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Патент USA US2049623

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Aug. 4, 1936.
E. G. ROEHM
' 2,049,623
BROACHING MACHINE
Filed Nov. 5, 1954
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INVENTOR.
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flaw/7569059”
BY
ATTORNEY.
Aug. 4, 1935.
E, G_ ROEHM
’
2,049,623
BROAGHING MACHINE
Filed Nov. 5, ‘1954
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INVENTOR.
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ATTORNEY.
Aug, 4, 1936.,
2,049,623
E. G. ROEHM
BROACHING MACHINE
Filed Nov. 5, 1934
7 Sheets-Sheet 4 '
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I IN VENTOR.
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ATTORNEY.
Aug- 4, 1936‘
E. G. ROEHM
"
2,049,623
BROACHING MACHINE
'
Filed Nov. 5, 1934
7 Sheets-Sheet 7
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Patented Aug. 4-, 1936
I
entree stares eater rotting
2,049,623
BRQA€HING MASHENE
Erwin G. Roehm, Nor-wood, (Dhio, assignor to The
'
Cincinnati Milling Machine 00., Cincinnati,
Ohio, a corporation of Ohio .
Application November 5, 1934, Serial No. 752,829
20 (llaims. (01. 96-33)
This invention relates to improvements in ma- shown in Figure 1 as seen‘particularly from the
chine tools and particularly to improvements in
breaching machines.
One of the principal objects of this invention
5 is the provision of an improved breaching machine of the multiple or duplex type for mm
tinuously producing work pieces which is safe to
' a maximum degree,
_
-
right hand side of Figure 1.
‘
Figure 3 is a fragmentary plan view of the
work supporting table as seen from line 3--3 on
Figure 1.
5
Figure 4 is a fragmentary vertical sectional
‘view as seen from line t-i on Figure 1.
'
Another object of the invention is the provil0 sion of a broaching machine of the type above
speci?ed in which the work piece or pieces must
be securely clamped before the machine can be
set in operation.
A further object of the invention is the provi-
.
Figure 5 is a horizontal sectional view taken
immediately below the work supporting table sur
face as seen substantially from line 5-5 on Fig- 10
lire 4
Figure 6 is a vertical sectional view through
the control valve as seen from line 6-6 on Fig
ul'e 3-
I
'
~
_
_
l5 sion 01’ an improved hydraulically actuated
breaching machine of the duplex type including
a work supporting table adapted to support a
pair of work fixtures in which the work pieces
are to be secured by power means, which "power!
Figure'iisastaggered horizontal sectional view 15
taken on line l—_—l on Figure 6-Figure 3 is a longitudinal sectional view
through the work Supporting ?xture as seen for
example from line 8'4 011 Figure 3
means must be operated in order to e?‘ect the
operation of the broach ram.
Figure 9 is a horizontal sectional view as seen 20
from line 9-9 on Figure 3
It is alsotan object of this invention to provide
a breaching machine which includes a work sup-
Figure 10 is a sectional View of 9' form of Valve
uiflhzed for actuating the work clamping mecha'
port and in which the means for actuating the
“151m
25 :broach is interconnected with the work support
whereby each must be functioning in a normal
manner before the other can be operated_
It is also an object of the present invention to.
provide a breaching machine adapted to be con-30 tmuously operated but which, if. the operator has
.
.
.
..
.7
ams.m'
.
~.
.
'
.
Flgur? 12 is 8' dl'flgramnfatic ‘new mustratmg
the vanoushydrauhc circuits and control valves 30
tilized in the operation of the machine.
u
.
.
.
provision of a breaching machine which includes
with the work supporting ?xtures removed and
-
a movable work support and in which the work
cannot be released from the work support so long
as the work support is in position with its work
piece adjacent to or in line with the breaching
tools.
_
.
_ other oblects and adYantages of the “859m
invention should be readily apparent by reference
to the following speci?cation, considered in conjunction with the a‘iwmpanymg drawings form"
45 ing
ail-V a modl?eetwps
part‘; the1:e0f and
may isbetomade
be understood
m the exact
Structural detalls ' there shown and described,
the Scope of the appended claims,
departing from 01‘ exceeding the Spirit Of the in50 vention-
In the drawings!
55
w
not ?nished securing a work piece thereto, will
stopA still
at thefurther
completion
of each cutting cycle.
object of the invention is the
49
.
Figure 11 is a diagrammatic View °f 9' simple 25
hydraulic circuit as_ employed with the valve of
Figure 10 for operating the work clamping mech
.
.
?igure 13 if’ a‘itop platini‘snfeviv
oi: tn: wgikgme
S_up§
po ng mec an Sm an
sm M 0
illustrating a modi?cation of the invention.
35
_Figure 14 is an enlarged fragmentary eleva
tional view of certam of the parts on the right
?aéllldmersxgctggnéigure 13 and showing the valve Figure 15 is a fragmentary sectional view as 40
seen substantially from line l5—i5 on Figure 14.
Figure 16 is a diagrammatic View similar to
Figure 12, but including the additional valves and
circuits needed in connection with the modi?ca
tion
Throughout
shown in ?gures
the severaltoviewsinclusive.
of the drawings
similar reference characters are employed to de
note the Same or simila‘r parts.
As was noted above, this invention pertains to
hydraulically actuated machine tools and par- 50
ticularly hydraulically actuated broaching ma
Figure l is a front elevation 01’ a broaching ma~
chine embodying improvements of this inven-
chines of the duplex type. In this type 'of ma
chine tool a plurality of work supports are em‘
tion.
Figure 2 is a side elevation of the machine
ployed whereby onework piece is being operated
upon while the other work supportisbeing loaded. 55'
2
- 2,049,623
By the present invention the several parts or
units of the machine and the work supporting
In order to clamp the table in its operative posi
tion the plate 39, see Figure 4, is provided with
mechanism are interlocked so that the machine or
a guide way 56 in which is disposed a clamping
bar 51. The bar 51 is provided on its forward
face with rack teeth 58 adapted to mesh with the
teeth of a pinion 59 integral with or secured to
the arm 5|. From this it will be seen that the
the tool moving elements thereof cannot be oper
ated until the work is securely clamped.~ Further
more, by the present invention the work piece
that is being operated upon cannot be released
until its work support has been retracted a
sufficient distance from the tool, thereby prevent
ing the inadvertent loosening of the work while
in contact with the tool which would result in
bar 51 is axially shifted as the work table is '
oscillated. The ends of the bar 51 are adapted
to enter the space between a clamping blockor 10
anvil 60 and the opposed wall of the guide way
either damage to the work or the tool or a
56 for thereby accurately positioning the work
wrecking of the machine.
Speci?cally, the machine of this invention com
prises a base 25 which is of hollow construction
table and restraining the outward movement of
the table due to the cut thrust on the work. It
will be understood that there is a separate clamp
ing mechanism at each end of the bar for corre
and utilized as a tank for fluid, preferably oil, as
will later appear. Rising from the base 25 is a
column 26 to the forward face of which is secured
the knee or table support 21. It might be noted
at this time that the base column and knee are
of fabricated construction, that is, built up from
suitable sheets of steel welded to one another.
Since this welded construction forms no part of
the present invention the details thereof have not
spondingly securing the table in position depend
ing upon which of the broach rams 3| or 32 is
operating through its cutting stroke.
The means for actuating the broach rams, pis 20
tons and the table indexing piston is clearly shown
in Figure 12 in diagrammatic form. The mechan
ism is also shown both in diagrammatic and struc- ‘
tural form in co-pending application to Millard
Romaine and Erwin G. Roehm, Serial No. 25
The column 26 is provided with a front plate 744,552, to which reference may be had for the
28 to which is secured a plurality of bars 29 which ' structural mechanism and particularly the mech
between them form a guide way 39 for each of the anism tojactually shift the various valves. The
been further illustrated or described.
broaching tool slides or rams 3| and 32. The
rams 3| and 32 are substantially U-shaped in
cross section thereby providing a hollow space
50
60
75
a sump or tank 6| containing ?uid to be circulated 30
through the system, which is preferably oil and.
the tank is preferably located in the hollow base
25 of the machine. Located above the tank 6| is‘
means which actuates the said rams. The means the pump 62 driven, see Figure‘ 2, by the motor
for actuating the rams 3| and 32, as shown in the 63 which together with the pump 62 is mounted on 35
drawings, comprises a pair of cylinders 33 and 34, a plate 64 and disposed within the column through
each of which respectively encloses a piston 35 a suitable opening provided therethrough in the
and 36, see Figure 12. The piston 35 is connected rear thereof. As seen in Figure 12 the pump 62
by a strap or bracket 31 to the slide or ram 3| has connected to one side thereof a suction pipe
while the piston 36 is connected by a similar strap 65 which terminates in the sump or tank 6|. 40
or bracket 38 with the slide or ram 32. The means . Projecting from the other side of the pump 62 is
for actuating the pistons 35 and 36 is clearly the pressure pipe or conduit 66 which terminates
shown in Figure 12 and will be described in in a starting, stopping and emergency reverse
valve indicated in general in Figure 12 by the
detail later.
The table support or knee 21 has an upper plate reference numeral 61. The pressure pipe or con 45
39 which supports the work table and means for duit 66 is connected through a by-pass or relief
actuating it. As shown in Figure 4, the plate valve 68 with the tank 6| which mechanism,'as
39 has rising therefrom a stud or shaft 40 which is usual practice, determines the effective pres
constitutes a trunnion for the table 4|. As seen sure in the pipe or conduit 65 and therefore the
in Figure 3, the table 4| is provided on its inner operating pressure for the system.
50
end with a pair of angularly disposed faces 42 and
The valve mechanism 61 comprises a valve
43 which are adapted to be alternately aligned bushing 69 through which is formed a plurality
respectively with the rams 3| and 32 so that work of ports 10, 1|, 12, 13, 14, 15, 16 and 11 to each
of which is connected one end of a pipe or con
pieces thereon may be tooled or broached.
To oscillate the work table use is made of a duit as will be later pointed out. Disposed with 55
piston 44 enclosed within a suitable cylinder 45 in the bushing 69 is ‘a piston valve member 18
secured to and depending from the plate 39. The being provided with a plurality of collars or pis
piston 44 is secured to the inner end of a piston ton portions between which are formed reduced
rod 46 which is provided near its other end with portions or cannelures and adapted to connect the
rack teeth 41. The rack teeth 41 mesh with a ports in different combinations depending upon
suitable rack pinion 48 integral with or secured the position thereof. The valve member 18 has
to a vertically disposed shaft 49 rotatably jour-' three operative positions; the running position
naled in a bracket 50 depending from the plate 39. which is shown in Figure 12, a stopping position
The shaft 49 projects upwardly above the plate which is to the left of that shown in Figure 12
39 to receive an arm 5| most clearly shown in when the end of the valve member contacts with
Figure 5. The arm 5! has rotatably mounted the adjacent end of plug 19 and a reversing posi
thereon a roller 52 which has its axis eccentric tion when the said left hand end of the valve
to the axis of the shaft 5| . The roller 52 is adapted member 18 engages the housing 80' of the plug
to enter the space 53 provided between a pair 19 and the spring 8| behind the plug 19 is com
'
70
of lugs or blocks 54 and 55 secured to the under pressed.
In order to shift the valve to its several posi
side of the table 4|. From this it will be seen
that oscillation of the arm 5|, through the roller tions there is provided a pair of levers 82 and
52 and blocks 54 and 55, effects the oscillation of 83 respectively disposed on the right and left hand
the table 4| from one operative position to the sides of the machine and respectively secured to
the projecting ends of a shaft or rod 84 rotat~ 75
other.
behind each ram which, together with additional
space provided by the bar 29, is utilized for the
40
hydraulic circuit, as shown in Figure 12, comprises
'
aocaeas
alcly jourhaled lo the lmee or work support til. I yorid the rear oi‘ the column to which projecting
The lever 83: on the ‘hit hahcl side of the ma» end. is secured a lever and limit mechanism ill,
in tum connected at its upper end to a valve
chine, as seen in Figure 1, has connected there
with one cool oi’ a rod til, see Figure 2, the other shifter lever 923. The valve shifter lever 823 has
end of which is pivotaliy connected to a short its free or ball end illi received in a notch H25
arm lit secured. to a shaft @‘l. The shaft @‘l is formed in the valve member i it. For further de
rotatably mounted ‘in a valve hloclr tt disposed
within the column '26 and this hlocls has pressed
thereinto the valve bushing ht. Secured to the
ill shaft t7] and adjacent the valve loloclz 8t is a
valve shifter lit having one arm iiii disposed in a
notch iii formed in the valve member “it and a
second arm
engaging a shoulder or of a spring
pressed plunger til. The plunger so is provided
on its free end with a hose t5 adapted to engage
the valve member ‘it and latch same in a run"
ning position as shown in Figure 12. The valve
member 'lil is shifted to its stop position by a
spring 96 shown diagrammatically in Figure 12
20) as being disposed within the valve bushing til anol
abutting on its inner emi with the valve mem»
ber lt and its outer end. with a plug which closes
the end of the bushing til. it is against the re
tails of the mechanism for shifting this valve at
tention is invitecl to the co-pending application of
Millard Romaine and Erwin G. Roehm, above
identi?ed; it is su?ilcient to note that the oscil
lation °of the work supporting table effects the
shifting of the valve member lit at each end of
its stroke.
As seen in Figure 12 the valve bushing set has
respectively connected with its ports lilti, [Ill and
lit the pipes or conduits MS, Hill and H65. The
ports ill anol lilll have respectively connected
therewith one end of pipes or conduits lit} and
ill which terminate at their other ends in a sales
ty valve mechanism indicated in general in Fig 20
are 12 by the reference numeral [12513. The ports
i it and l ill have respectively connected therewith
one cool of pipes or conduits are and ltll which
sistance of the spring @t that the plunger or latch _ terminate at their other ends in the valve mech 25
anism indicated in general in Figure 12 by the
25 llt retains the valve member to when in a run
reference numeral ltl; this valve mechanism ill
hing position. The valve member “it is shifted
to the reversing position by either of the loan
dies against the resistance of the spring ill. Upon
release of the handle the said spring 31% returns
30 the valve rriemloer to its stop position.
As seen in Figure 12, the ports
or the valve
mechanism ill has corlhectccl therewith the pipe
or conduit
while the port ll’ has connected
i
therewith one one. ot a hrarica pressure concloit
the other coil of which is connected with the
pressure pipe or conduit
The ports it and “it
have respectively connected therewith discharge
pipes or conduits
ahrl
which terminate in
the swap or tari'c;
port "it
coririecteo
therewith ooe eml of a pipe or conclilit
which
(iii .
terminates. at its other one in a pressure recioc»
log or relici valve rriecl'lanisrh indicated in gen“
eral in
i2 hy the reference immoral tilt
‘and the saicl pipe or conduit ice is connected;
with a secomi valve mechanism indicated in gen”
eral in Figure it hy the reference numeral it?
‘by
hasmeans
corihectezi
of a pipe
therewith
or conduit
a pipe or The
conduit
port tilt
wi'iicli terminates in the valve mechanism it?
till while the remaining ports ‘iii and ‘it have lilee~
is under the control and operation of the breach
slide 32,- as will be described later. The remain
ing ports i l2 and. i it have respectively connected
therewith one end of pipes or conduits H32 and
i133 which terminate at their other ends in a valve
mechanism 8% which is similar to the valve mech‘
arilsro ill and is under the control and operated
Toy the breach slide iii as will later he olescriloed.
With the? valve members “ill ancl tliithe pres~
sure in. the pipe or conduit to is connected
through the pipe or consult lot with the pipe or
coiiciilit
and the valve mechanism till. ‘The
valve mechanism ltl comprises a valve bashing
in which. is termed ports i331, ill'i, its, Elie,
Mi, M2 and ital. Disposed. within the hero
iii the valve hashing‘ i525] is a piston type valve
member
being provided with a plurality of
piston portions forming between them reciiioerl
portions or canrrelores adapted to connect the
certs iii iiiiierent combinations depending upon
the position of the valve.
[is was mentioned above, the valve mechanism
Bill is operated by the slide it anal for this pur»
pose the valve member léléi thereof; is provided
wise connected therewith. one cool or a pioe or
with a transverse notch or groove lit receiving
conduit lot which terminates in the valve mechae
the hall cod tilt oi a valve shifting lever ill.
The lever i?lil is connected through suitable
linkage to a reel ltt which projects through the
column anal hevond the forward face thereof to
receive a flipper member tilt. see Figure l. The
?ipper} its is provided with a pair of offset lugs
tell and lot adapted to he respectively actuated
by clogs i552 anti let respectively secured to the .
slide at the lower and upper ends thereof. This
valve shifting mechanism is shown in further do:
tail in the aforementioned co-pendirig applica
tion. ‘It should he noted, however, that the valve
member ltirt is shifted to the position. shown toy 65
the clog E52 and to its second position to the
right of that shown by the clog H53. As seen in
nlsm
The valve mecl'iaiiisiri loll comprises
valve
hashing tell in which is formed ports till, lite,
its, illi, ill, llii, iii-l, lit cool lit. Disposecl
within the here in the bushing 8% is a valve
member i it having formed thereon a plurality of
piston portions for providing between them re‘
60 duced portions or camieliires adapted to connect
the bushing ports iii oll?ererit combinations. The
valve member lit has two positions. that shown
in Figure 12 and a second position to the right
thereof. This valve memloer is shifted by the
work table at the end oi’ each oscillation-thereof.
The means for vshifting the said valve is shown
structurallyiri Figure ‘l and comprises a disc iii
secured to the lower cool of the shaft it for rota
tion or rather oscillation with the shaft it. Se
cured to the periphery of the disc i ii. is a pair of
dogs lit and i691 adapted to engage lugs depencl-=
ing from a flipper member 626. The ?ipper lie
is secured to the inner end of an oscillatable roci
ill rotatahly journaled in hearings provided by
the column. The rod ill projects outwardly loc
Figure lithe port its has connected therewith
one end of a pipe or conduit i555 which has its
other end connected to the pipe or conduit 82?. 70
‘The port it? has connected with it one end of a
pipe or conduit 555, the other end or which is
‘ connected with a pipe or conduit llit which ex-= '
tends between the valve mechanisms Bill anoi
lit.
e ports lit and tilt have respectively 75
4
2,049,c23
I connected therewith one end of pipes or conduits
I51 and I58 which terminate at their other ends
in the valve mechanism I34. The ports I“ and
I43 have respectively connected therewith the
ends of the pipes or conduits I29 and I30 ex
is connected with the pipe or conduit I19 and the
tending from the valve mechanism I02 while the
remaining ports i39 and I42 have respectively
I69 and I60 which respectively terminate at ‘the
lower end of cylinder 33 for e?ecting the up
ward movement of the piston 35. The medium
ahead of the piston 35 is at this time connected
through the pipe or conduit I06 to the valve
lower and upper ends of cylinder 34.
mechanism I34 and through the pipe or conduit
With the valve member I44 in the position
shown in Figure 12 the pressure in the pipe or
conduits I 29 is connected with the pipe or conduit
I60. for causing a downward movement of the
I33, valve mechanism I62, pipe or conduit I65,
valve mechanism 61 and discharge pipes or con
duits99 and 38 with the sump or tank 6|. From
the foregoing it will be noted that the piston 36
piston 36 in the cylinder 34. The hydraulic
and slide or ram 32 are now descending and pass
medium on the other side of the piston 36 is ex
hausted through the pipe or conduit I59 to the
valve mechanism I3I where it is connected with
the pipe or conduit I58 and the valve mecha
ing through a cutting stroke while the‘ piston 35
and slide or ram 3i is ascending and passing
through an idle stroke. These movements of the
parts continue until the said rams reach the
' connected therewith one end of pipes or conduits
'20
nism I3I is connected with the pipe or conduit
I58 with the valve mechanism I34. With the
valve member I10 of the valve mechanism I34 in
the position shown in Figure 12 the said exhaust
nism I34.
limits of their movements whereupon the valve 20
The valve mechanism I34, as was noted above,
is similar to the valve mechanism I3I_ and com
prises a valve bushing I6I through which is
members I10 and I44 are shifted to their second
or right hand positions as seen in Figure 12.
When the said valve members I44 and I10 have
been shifted to their second or right position
the pressure in the pipe or conduit I23 is cut 25
off from the pipe or conduit I60 and connected
with the pipe or conduit I68. It should be noted
at this time that if the piston 35 and slide or ram
3i are not at their upper limit of movement the
said pressure in the pipe or conduit I58 is con
formed ports I62, I63, I64, I65, I66, i61, I68 and
I69. Disposed within the bore in the bushing I6!
is a valve member I10 of the sliding piston type
which has provided thereon a plurality of spool
or piston portions between which is formed
cannelures or reduced portions for connecting the
bushing ports in different combinations depend
ing upon the position of the valve member I10.
The valve member I10 is shifted-and controlled,
as was noted above, by the ram 3|, for which
purpose the slide 3| has adjustably secured dogs
35 which are similar to the dogs I52 and I53 of the
slide 32. These dogs are adapted to respectively
engage lugs I1! and I12 projecting in offset rela _
nected with the pipe or conduit I19 for continuing l
the movement of these parts to their final posi
tion. As soon as these parts are properly posi
tioncd, as mentioned above, the valve member I 10
is shifted for connecting the pressure in the pipe
or conduit I58 with the pipe or conduit I56 and
the pressure reducing or relief valve IOI.
tion from a flipper member I13 secured to a
As shown in Figure 12 the pressure reducing or
shaft or rod I14 oscillatably journaled in the
relief valve mechanism IIII comprises a bushing
40 column in a similar manner that rod I48 is
MI in which is formed a plurality of ports I82, 40
I83 and I84. Disposed within the bore in the
mounted. The rod- or shaft I14 is adapted ‘to
actuate a valve shifting lever I15 which has its bushing I8I is a valve member I85 having formed
"call end I16 received in a transverse notch or thereon piston portions I 86 and I81. Extending
groove I11 formed in the valve member I 10.. from the, piston portion I86 is the reduced portion
.45 This valve shifting mechanism is clearly dis
50
I88, while extending from the piston portion I81 45
is a conical portion I89 which terminates in the
reduced portion I88. The conical portion I89 is
closed in the above mentioned co-pending appli
cation to which reference may be had for further
details. It will be appreciated, however, that
the valve member I10 is actuated by the ram ‘or
utilized to more or less throttle the port I84.
slide 3|.
abuts on one end with the piston portion I81 and 50
on its other end with an adjustable abutment
By reference to Figure 12 it will be noted that
the ports I63 and I66f/of the bushing I6I have re
spectively connected therewith one end of ‘the
pipe or conduit I56 and I51 which respectively
55 extend from the relief or pressure reducing mech
anism IOI and the valve mechanism I3I while
the ports I61 and I69 have respectively connected
therewith the other ends of the pipes or conduits
60 I32 and I33 which extend from the valve mecha
nism I02. The port I62 has connected with it
one end of a pipe or conduit I18, the other end
of which is connected to the pipe or conduit I26
which extends between the safety ‘valve mecha
65 nism I28 and the table actuating valve mecha
nism I02, while the port I64 has connected with
it the end of the pipe or conduit I58 which ex
tends from the valve mechanism MI. The re
maining bushing ports I65 and I68 have respec
70 tively connected therewith one end of a pipe or
conduit I19 and I80 which respectively terminate
at their other ends in the lower and upper ends
of the cylinder 33.
As was noted above, the hydraulic medium ex
up hausted from the cylinder 34 to the valve mecha
Dis
posed within the bushing MI is a spring I90 which
I9I for varying the tension in the spring M10.
The port I83 of the bushing IBI’ has connected
therewith the pipe or. conduit I56 through which
the pressure is now ?owing. The port I84 has 55
connected with it the end of the pipe or conduit
I00 extending from the valve mechanism 61. The
remaining port I82 has connected therewith one
end of a pipe or conduit I32 which has its other
one! connected with the pipe or conduit I56 and 60
the pipe or conduit I92 has therein a hydraulic
resistance or choke coil I63.
The operation'of this pressure reducing or re
lief valve is well understood since the pressure in
the pipe or conduit I56 ?owing through the pipe 65
orv conduit I92 and the resistance coil I93 shifts
the valve member I85 against the resistance of
the spring I90 for opening the port I84 an amount
determined by the adjustment of the abutment
I 9|. The opening of the port I84 permits the 70
discharge of a certain quantity of ?uid ?owing
throughthe pipe or conduit I56 through the pipe
or conduit I00 to the valve mechanism 61 and
tank or sump 6|. The remaining ?uid in the pipe
or conduit I56 is connected by way of pipe or 75
2,049,623
conduit E55 and the valve mechanism lti where
it is connected with the pipe or conduit 651%.
Since, and as was mentioned above, the pipe or
conduit 6% is connected with the pipe or conduit
t2’? the pressure is now connected with the safety
valve mechanism 628.
This valve mechanism 628 comprises a valve
bushing i913 through which is formed a plurality
of ports W5, MS, Hill and H98. Disposed within
the bore in the bushing tilt is a valve member
nelures 223 and 22d adaptedto connect ports as
shown in Figures 6 and 12_when the, valve mem
ber is'in the said position and when in its sec
ond position to cut off the ports 2H? and M9 re
spectively from the ports are and 228.
As was mentioned above, this valve mechanism
2% is utilized to prevent the operation of the
work table until the parts are in the proper or
desired position, that is, the table is prevented
from being oscillated unless the un?nished work 10
‘999 of the sliding piston type and has formed - piece is securely clamped in its work ?xture. Be- ‘
thereon a plurality of piston portions between fore describing the mechanism which actuates the
valve member 222 it is desired ‘to describe the
which are provided reduced portions or cannel
ures for connecting the port 595 with the port work ?xture and means for operating the same.
Referring, therefore, to Figures 3, 4, 5, 8 and 9 115
15 Hi6 and the port 99? with the port lilil when in
its second operative position, that to the right of it will be noted that the work table M has se
the position shown in Figure 12. The valve cured thereto a pair of work ?xtures respectively
member 5957 is normally in. the position shown indicated in general by the reference numerals
225 and 226 and since these ?xtures are substan
in Figure 12 and is yieldably shifted to this po
20 sition by a spring 288 disposed Within the valve tially identical ‘but one of them will be described 20
bushing lied and abutting on one end with the
valve member 999 and on its other end with a
plug which closes the bore in the valve bushing.
The valve member i953 is adapted to be shifted
25 to its second operative position by each of the
slides or rams 3i and 32vwhen said slides or rams I
are respectively in their uppermost position.
For
this purpose each ram has secured to‘ it a third
dog 269. The dog 2!]! on the slide or ram 32 is
30 adapted to engage a lug 202 projecting from flip
per dog 293 secured to an oscillatable rod or shaft
264 journaled in the column and projecting
therefrom the rod or shaft 2% is connected
through suitable linkage with a valve shifter lever
35 285 which has its reduced or ball end 206 dis
posed in a transverse slot or groove 20'? formed in
the valve member 499. This linkage is clearly
shown in the above mentioned co-pending ap
plication and since the details thereof form no
40 part of the present invention it should suffice
that the ram 32 actuates the valve member W9.
In order that the slide or ram at can eifect the
operation of this valve the ?ipper 203 has pro
jecting from it a tongue 208 which is received in
a transverse groove or slot 2% formed in a sec
ond flipper dog 2E0 properly mounted to the
face of the column. The second ?ipper dog 2“!
has projecting therefrom a lug 2! i which is sim
ilar to lug 2G2 and adapted to be engaged by the
50 dog 20! of the slide or ram 3!.
By reference to Figure 12 it will be noted that
the pipe or conduit I2‘! is connected with the port
N5 of the bushing we while the port Hill has con
nected therewith the end of the pipe or conduit
55 I26. The remaining ports or conduits E955 and
H8 have respectively connected'therewith one end
of pipes or conduits 2H2 and 2 l3 which terminate
at their other ends in a valve mechanism 2%,
which valve mechanism is utilized for prevent
60 ing the operation or indexing of the work table cri
cept when the parts are in a desired position.
The valve mechanism 2% is shown structurally
in Figure 6, and as there shown, comprises a
valve casing 2E5 which is adapted to be secured
to the right hand side of the table support or
knee 2‘! as shown in Figure 2.
Pressed into a
suitable bore in the casing 255 is a valve bushing
2H3 having formed therethrough a plurality of
sets of radial ports 2H, 2H8, Eli! and 228, each set
70 of ports being encircled by a similar circumfer
ential groove 22! formed in the exterior of the
' bushing 2 l 6.
Disposed within the bore in the
bushing 286 is a valve member 222 having formed
thereon a plurality of piston portions for pro
viding between them reduced portions or can
in detail. Accordingly, and as seen in Figure 8,
there is provided a plate 22? supporting on its
upper surface for sliding movement relative
thereto a carriage 228 to the rear end of which
is secured a plate 2%.
Rotatably carried by 25
the plate 221' is a screw 2% having its threaded
end 2M received in a nut 232 secured to the
upper surface of the plate 22?. The screw rec
projects forwardly of the plate 229 to receive a
knob 233 whereby thescrew may be rotated. 30
This adjusting mechanism is provided in order to
accurately position the ?xtures and the work
carried thereby relative to rams 3t and 32 and
the broach tools carried thereon.
At the forward end ofthe carriage 228 there
is provided a work rest 23% disposed forwardly
of a rib or anvil 235 from which'projects pins
236 and 231i._ The anvil 235 through the pins
236 and 23? takes the outward thrust of the
broach tools while the rest 23% takes the down 40
ward thrust. To secure the work 238, here shown
as a connecting rod cap, on the rest 23% the
carriage 228 has rising therefrom a pair of pivot
pins 239 and 2130 on which are respectively jour
naled arms 2M and 2&2. Secured to the outer 45
ends of the arms 2M and 252 are respectively
clamping jaws 243 and 24% adapted to be ad
justably secured by suitable adjusting screws and
clamp bolts'shown in Figure 9. The arms 2M
and?t are actuated about their pivot pins by. 50
means of a rotatable cam M5 having cam sides
2% and 2M which respectively engage lugs 24%
and 2M projecting from the arms 2M and M2.
In order to hold the arm lugs 248 and 2&9 in
contact with their cam faces 246 and 2M the said 55
arms have each connected therewith o?set ends
of a spring 253. The cam 265 is keyed or other
wise secured to» an oscillatable shaft 25!) jour
naled in bosses 258 and 252 rising from the upper
surface‘ of the carriage 228.
'
60
In order to rotate or oscillate the shaft 250
the said shaft projects beyond the carriage 228
to which projecting end is keyed or otherwise
secured a rack pinion 255 meshing with rack
teeth 255 formed on a piston rod 256, see Fig 65
ure 3. The piston rod 256 has secured thereto
a piston 25'? which is enclosed‘ in a suitable cyl
inder 258. The cylinder 258 is closed at opposite
ends by heads 259 and 269, the latter of which
may ‘be formed integral with the carriage 70
plate 229.
From the foregoing it will be noted that each
work ?xture is power actuated to securely clamp
work pieces therein. While the work piece shown
in the drawings is a connecting rod cap it should 75
6
2,049,623
be noted that the mechanism is not to be limited
to this type of work piece as the invention will
operate with equal facility on all types and kinds
of work pieces.
The piston 251 is adapted to be either hydrau
lically or pneumatically actuated, it being shown
in the drawings as operated by air pressure. In
order to connect the pressure with alternate ends
of the cylinder there is provided a valve mecha
10 nism indicated in general in the drawings by
reference numeral'26l which, as shown in Fig
ure 10, comprises a housing or casing 262 having
an oscillatable plug valve member 263 therein.
The casing 262 is provided with ports 264, 265,
15 266 and 261.
The ports 264 and 266, as shown
in Figure 11,'have respectively connected there
with one end of pipes or conduits 268 and 269
respectively terminating at the inner and outer
ends of the work clamping cylinder. The port
20 265 is open to atmosphere while the port 261
has connected therewith one end of a pressure
pipe or conduit 218. In order to alternately con
nect the pipes 268 and 269 to pressure and to
atmosphere the plug valve member 263 is pro
25 vided with passages 2H and 212 adapted to be
alternately connected with the pressure pipe 218
and atmosphere.
‘
Each of the work clamping cylinders has con
nected with it its own control valve and their
30
respective plug valve members 263 project beyond
the casing. The said valves are respectively se
cured to the outer surface of their adjacent side
walls of the table support or knee 21. To the
projecting end of the valve member for work
?xture 226 is secured an arm 213 pivotally con
nected to one end of a link 214 which has its
other end pivotally connected to a lever 215,
in turn pivotally mounted on the right hand side
of the table support or knee 21.
From the foregoing it will be seen that oscil
40
lation of the handle 215 oscillates the valve plug
member 263 for the right hand ?xture to initiate
the movement of the clamping piston to release
‘the work and subsequently clamp an un?nished
45 work piece. From Figure 2 it will be seen that
the handle 215 is actuated in a clockwise direc
tion or rearwardly to open the work ?xture and
in _,an opposite direction to clamp the ?xture.
As was noted above, there is provided the valve
mechanism 2I4 which prohibits the oscillation
of operation of the work table once the work
?xture to be next operated upon is in proper
clamped condition. For this reason the valve
member 222 is actuated simultaneously with the
55 operation of the work clamping valve 263. The
link 214 is therefore provided intermediate its
ends with a vertical groove or slot 216_ receiving
therein a pin 211 projecting laterally from the
free end of an arm 218. The arm 218 is pinned
60 or otherwise secured to a stud 219 rotatably or
oscillatably journaled in a suitable bore formed
in.a bracket integral with the valve casing 2l5.‘
The stud 219 projects through the right hand
wall of the knee 21 and to said projecting end
65 is pinned or otherwise secured an arm 280.
The
arm 288 has its inner or free end 28l cam-shaped
and provided with the cam portion 282, see Fig
ure 6. Lying adjacent to and contacting the said
free or cam-shaped ends of the arm 288 is a
roller 283 rotatably secured to the upper end of
an arm 284, the arm 284 being in turn pinned
or otherwise secured to a short shaft or stud 285
oscillatably mounted in a bearing provided by
the valve housing 2l5. As seen in Figure '7 the
15 shaft or stud 285 projects into the interior of
the valve housing 21 5 and has pinned to the
said projecting end a lever 286 with its ball
end 281 disposed in a transverse notch or slot
288 formed in the valve stem 289 of valve mem
ber 222.
From the foregoing it will be noted, with par
ticular reference to Figures 2 and 6, that opera
5
tion of the handle 215 in a clockwise direction or
rearwardly causes the link 214 to be shifted to
the left, thereby actuating the arms 218 and 288 10
in a counterclockwise direction. This movement
of the arm 288 through the arm 284 and lever
286 effects a downward movement of the valve
member 222 for cutting off ports 2“ and 2"!
respectively from the ports 2l‘8 and 228. This 15
would, of course, interrupt any flow between the
said ports and pipes connected therewith as will
later be made clear and it should be noted that
with the valve member 222 in this position the
indexing mechanism for the work supporting 20
table is cut off. The movement of the valve
member 222 as just described is against the yield
ing resistance of a spring 296 disposed in the
lower end of the valve bushing 2l6, the spring
298 abutting on one end with the valve member 25
222 and on its other end with a plug 29! which
closes the end of the bushing bore. The spring
298 effectively maintains contact between the
roller 283 and the end of the arm 288.
The foregoing description deals with the opera
tion of the valve member 222 when the clamping
valve mechanism associated with the right hand
?xture 226, as seen in Figure 3, is operated. As
was noted above, the valve member 222 is actu
ated simultaneously when the other ?xture is 3"
operated and for this purpose the valve mecha
nism indicated in general in Figure 3 by the
reference numeral 292 for the work ?xture 225
has its plug valve member connected with a
handle 293 which is identical with the handle 40
215 by way of a link 294 which is substantially
identical with the link 214. The link 294 is pro
vided with a groove or slot 295 receiving a pin
296 eccentrically disposed to and carried by a
disc 291 which is secured to a shaft 298 extend
ing substantially entirely across the work sup
port or knee 21. The shaft 298 stops short of
the inner surface of the right hand wall of the
knee and is in axial alignment with the stud
219, see Figure. 7. Secured to the end of the 5“
shaft 298 adjacent the arm 284 is an arm 299
which is similar in contour to the arm 288 and
is provided at its free end with, a cam portion
which is similar in all respects to the cam por
tion 282 of the arm 288. The said cam portion
of the arm 299 is adapted to engage the roller 283
of the arm 284, the said roller being of a width
equal to the combined width of the arms 288 and
299 as seen in Figure 7. From the foregoing it
will be seen that the operation of the work clamp
ing andreleasing handle 293 on the left hand
side of the work support or knee 21 through the
linkage just described and arm 299 effects the
operation of the valve member 222 in the same
manner as above described in connection with
the work clamping and releasing handle 215.
By reference to Figure 12, it will be noted that
the ports H8 and M9 of the valve bushing 2|6
‘has respectively connected therewith the other 0
ends of the pipes H2 and H3 which extend from
the valve mechanism I28. The remaining ports
H1 and 228 have respectively connected there
with the ends of pipes or conduits 388 and 38!
which respectively terminate at their other ends 75
9,049,623
in the forward and rear ends of the
work table
indexing cylinder 65.
As was mentioned above, this machine em»
bodies means whereby the work ?xture whose
work piece is being tooled cannot be unclamped
until the work supporting table has been oscil
lated or backed away from the tool a certain
predetermined distance to clear the work of the
tool.
This means, as shown in the drawings,
comprises a pair of pins 302 and 303 projecting
respectively from the sides of the table ti which
is adjacent the work clamping ?xtures 226 and
22?. With the table it in the position shown in
Figure 3 the pin cs2 lies behind an arm or ?nger
15 306i, pinned or otherwise secured to the shaft in
which for convenience is a part of the arm 280.
of pipe or conduit I55 and is connected by said
valve with conduits IM and I2‘! and valve mech
anism I28. At this time the ?ow in the pipe or
conduit i2? is connected with the pipe or conduit
2 I 2, valve mechanism 2 I t, pipe or conduit 30! and
cylinder 455 for actuating the piston M and there
by indexing the table. The medium behind the
piston M is exhausted through the pipe or con
duit 390, valve mechanism Zlli, pipe or conduit
By reference to Figure 3 it will, therefore, be
2L3, valve mechanism l28, pipe or conduit 826,
noted that with the table as there shown a move
valve mechanism I66, pipes or conduits I 03 and
I09, valve mechanism 6'5 and pipe or conduit 38
ment of the handle 2% outwardly in order to
20 release the clamped work piece would require
the moving of the table thereby. Since this
would be impossible the ?xture cannot be oper
ated until the table has indexed suiiiciently to
retract the work from the line of movement of
25
The excess fluid or flow in the pipe or conduit 255
is connected with the pipe or conduit Ill!) by way
of the valve mechanism ill! to the valve mecha»
nism 61 where it is directed to the pipe or con
duit 98 and therefore the sump BI. The remain;
ing flow and pressure in the pipe or conduit I55
is connected with the valve mechanism I3 I by way
the tool.
'
The pin M3 on the other side of the table ti
cooperates with a ?nger or lever and which is
pinned or otherwise secured to the shaft 298, and
similarly the ?nger 3M physically resists the
to the sump or tank 6 I.
I
90
As soon as the table is fully indexed the valve
member I E6 of valve mechanism W2 is shifted to
its second or right hand position, thereby revers
ing the circuits above described to the broach
jcylinders 33 and 34 for reversing the flow therein 25
and effecting the downward movement of the ram
BI and upward movement of the ram 32. During
this movement the work ?xture 225 is operated
to release the ?nished work piece therein and to
80 operation of the valve mechanism 292 when the secure in position an un?nished work piece. As 30
was fully described above, this operation shifts
work in the ?xture 225 is being operated upon.
the valve member 222 of the valve mechanism
The operation of the machine is as follows:
With the valves in the position shown in Figure
12 the work slide or ram 32 is descending be
85 cause the pressure. developed by the pump 62 is
40
45
50
60
"connected with the upper side of its piston
through the following circuit. Pressure from
the pump 62 is discharged through the pipe or
conduit 66, valve mechanism 6i, pipe or conduit
I?tl, valve mechanism I02, pipe or conduit I29,
valve mechanism I3I and pipe or conduit M0.
The slide or ram 3i is at this time ascending
which is effected by the exhaus. from the cylin
der M-through the following circuit. The ex
haust from the cylinder 38 is through the pipe or
conduit E59, valve mechanism I3I, pipe or con
duit I58, valve mechanism I“ and pipe or con
duit I79 to the lower end of the cylinder 33 and
the under side of the piston 35. This exhaust
medium has 'su?icient pressure to elevate the
piston 35 and the upper end of the cylinder is'
connected with the sump or tank through the
following circuit. The exhaust from the said
cylinder 33 is by way of pipe or conduitIllB,
valve mechanism I34, pipe or conduit I33, valve
mechanism I02, pipe or conduit “15, valve mech
anism 6'1 and discharge pipes or conduits 99 and
98 to the sump M. The rams 3i and 32 con
tinue to move as just described until they each
reach the respective ends of their travels, that
is, the ram 32 its lowermost position while the
ram 3i its uppermost position.
As soon as the rams have been respectively po
sitloned the valve members of valve mechanisms
935, I35 and I28 are shifted and each assumes a
position to the right of that shown in Figure 12.
‘At this time the pressure in the pipe or conduit I29
is connected with the pipe or conduit I 58 through
the valve mechanism I3I to the valve mechanism
I3Ii where the said pressure is connected with the
pipe or conduit I56 and the valve mechanism It“.
The said pressure upon ?owing through the
pipe or conduit I92 positions the valve member of
the valve mechanism IBI to reduce the flow and
75 therefore the pressure in the pipe or conduit I56.
2M, thereby preventing any ?ow through the
pipes .or conduits 2I2 and M3.
Should the rams
3| and 32 reach the ends of the movements they
are effecting before the operator gets the un?n
ished work piece properly clamped and the valve
members of valve mechanisms I3I, I34 and I28
shifted to their proper positions, the machine
would cease to operate until the work clamping is 40
completed. As soon as the work clamping is com
pleted and the valve mecahnism 2 Id positioned as
shown in Figure 12 the table would then index
and the machine continue to operate. From this
it will be seen' that there has been provided a 45
mechanism in which the work must be properly
clamped in its ?xture at the completion of each
cycle of the machine or the machine will'auto
matically stop untilthe clamping of the work is
completed.
50
It will also be noted, as particularly described
above, that the work table cannot be indexed
until the cutting stroke of either ram is com
pleted due to, the physical interference of the
table pins 302 and 303 to the shifting of the work 55
?xture clamping valves.
The modi?cation shown in Figures 13 to 16 in
clusive discloses a mechanism for accomplishing
substantially the same function as the mechanism‘
previously described except that the oscillation or 60
indexing of the table may be initiated whether the '
work piece is clamped or not, but the said index
ing of the table will be stopped before the work is
in line with the breaching tool and therefore the
rams will be held against operation until the work
is fully clamped, whereupon the indexing of the
table is completed and the movement of the rams
initiated. Additionally, with the modi?ed struc
ture the ?nished work piece may be released from
its ?xture shortly after the retraction thereof
from the breach tool, thereby cutting down the
idle time of the machine and affording the opera
tor a greater period of time in which to release a
?nished work piece and clamp an un?nished
work piece. These additional functions are pro 75
2,049,828
vided by a different arrangement of the valves op
erated by the work ?xtures and by the oscillation
of the table, as will now be described in detail.
Speci?cally, each work ?xture'is provided with
a control valve identical with those above re
ferred to and indicated in’Figure 13 by the refer
ence characters 26l' and 292’. The valve mecha
nism 26l' has the plug valve member 263' pro
339.‘ .The bushing 339 is additionally provided
with ‘circumferential grooves 345 and 346 which
provide a passage around the bushing to act as
conduits for the medium as will be seen in dia
grammatic form in Figure 16. The valve mem- 5
ber 323 is provided with a plurality of piston por
tions forming between them reduced portions or
cannelures adapted- to connectthe several sets
jecting therefrom to which is secured one end of
10 an arm 306 to the free end of which is secured
of radial ports depending upon the position of
the valve member. The valve member is shifted to
one‘end of a link 301 extending along the right
hand side of the table support or knee 21. The
other end of the link 301 is connected with one
end of an arm 308 extending from the clamping
lever 309 pivoted at 310 to the side of the knee.
The link 301 is provided intermediate its ends
with a transverse slot receiving therein a pin 3“
projecting from the upper end of an arm 3l2.
The'arm 312 is pinned or otherwise secured to a
shaft 3l3 rotatably mounted in a bearing pro
vided by the valve casing 314. The shaft 313 has
additionally keyed or otherwise secured thereto a
second arm 3l5 having pivotally connected to its
free end a link (H6. The link 3| 6 is in turn piv
otally connected to a lever 311 which is secured to
a stud 3I9 oscillatably mounted in the valve cas
ing 314. Within thesaid valve casing 3 l4 the stud
3| 9 carries a valve shifter lever 320 having its re
its operative positions by the handle 309 through
15
20
.
25
duced or ball end 321 received in a slot 322 formed
in a valve member 323 of a valve mechanism in
dicated in general in Figure 16 by the reference
numeral 324. From the foregoing it‘will be noted
that the operation 01' the valve mechanism 26!‘
effects the operation of the valve mechanism 324.
35
The valve mechanism 292’, similar to the valve
mechanism 26l’, has its plug valve member pro
jecting therefrom. The said plug valve member
has connected therewith one end of a link 325,
. the other end of which is connected to the clamp
ing handle 326, which construction is similar to
that described in connection with handle 309.
Intermediate its.length the link 325 is provided
with a transverse slot 326 receiving therein a pin
_ 321 projecting from one end of an arm 328 which
45 is similar to the arm 3| 2.
The arm 328 is se
cured to one end of a shaft 329, rotatably jour
naled in suitable bearings provided by the table
support or knee 21 and extending entirely across
the said support. To the other end of the shaft
50 329 is secured a lever 330 having pivotally con
nected to its free end one end of a link 33l which
' is similar to the link 3l6. The other end of the
link 331 is pivotally connected to an arm 332,
in turn secured to a stud 333 rotatably or oscil
55 latably mounted in a bearing provided by the
valve casing 3“. The stud 333 is in axial align
ment with the stud 319 and the said stud 333 has
keyed or otherwise secured to it a valve shifter
lever 334 which has its reduced or ball end 335
received in a notch 336 formed in the stem of a
valve member 331. The valve member 331 is as
sociated with a valve ‘mechanism indicated in
general in Figure 16 by the reference numeral
338. From the foregoing it will now be seen that
65 operation of the handle 326 for actuating the
valve mechanism 292’ simultaneously shifts a sec
ond valve mechanism, the purpose of which will
be described in detail ‘later.
The valve mechanism 324, as seen in Figure 14,
70 comprises a valve bushing 339 pressed into a suit
able bore in the valve casing 3 I 4. The valve bush
the mechanism above described and these posi
tions are ?rst as shown in Figure 14 and second
a position below the one shown.
The valve mechanism 338 is shown structur
ally in Figure 14, and is similar to the valve mech
anism 324 and comprises a bushing 341 pressed
into a suitable bore in the valve casing 3l4. The
bushing 341 is provided therethrough with a plu
rality of sets 01’ radial parts 348, 349, 350 and 35l, 20
each set of ports being encircled by similar cir
cumferential grooves 352 formed in the exterior
of the bushing 341. This bushing 341 is addition
ally provided with a circumferential groove 353
for-providing a conduit or passage around the 25
valve mechanism 338.
-
The hydraulic circuit shown in Figure 16 in
the main and up to the valve mechanism I28 is
substantially identical to the valve mechanism
shown in Figure 12 and from there on the circuit 30 v
is different to accommodate the valve mecha
nisms 324 and 338 and a valve mechanism indi
cated in general in Figure 16 by the reference
character 354. The pipes or conduits 2l2 and 2 I3
which extend from the valve mechanism I28 in- 35
stead of connecting with the valve mechanism 214
respectively connect with pipes or conduits 355 ,
and 356. The pipe or conduit 355 extends be
tween the valve mechanism 324 and 354 while the
pipe or conduit 356 extends between the valve 40
mechanism 354 and 338. As seen in Figure 16,
the pipe or conduit 355 connects with the port
342 of the valve mechanism 324. The ports 3“
have connected therewith one end of a pipe or
conduit 351 which terminates at its other end in 45
the rear end of work table indexing cylinder 45,
while the ports 340 have connected therewith one
end of a pipe or conduit 358 which terminates at
its other end in a. pipe or conduit 359. The re
maining ports 343 of the valve mechanism 324 50
have- connected therewith one end of ‘a pipe or
conduit 360, the other end of which is connected
with a pipe or conduit 36l.
The valve mechanism 338, as shown in Figure
16, has respectively connected with its ports 348 65
and 351 the other'ends of the pipes or conduits
359 and 36L while the port 349 has connected
therewith the pipe or conduit 356. The remain
ing port 350 of the valve mechanism 338 has con—
nected therewith one end of pipe or conduit 362
which terminates at its other end in the forward
end of table oscillating cylinder 45. The valve
mechanism 354 is shown structurally in Figure 14
and comprises a valve bushing 363 through which
is formed a plurality of sets of radial ports 364,
365, 366 and 361, each set of ports being encir
cled by a similar circumferential groove 368; In
addition, the bushing 363 is provided with a pair
of circumferential grooves 369 and 310 which act
as conduits for the medium in by-passing the
fluid through the valve block 314. Disposed with
60
65
'
70
ing has formed therethrough a plurality of sets . in the bore in the valve bushing 363 is a piston
of radial ports 340, 3“, 342Vand 343, each set of valve member 31! provided with a plurality of
ports being encircled by a similar circumferential piston portions forming reduced portions or can
75 groove 344 formed in the exterior of the bushing nelures between them for connecting the sets of 75
9,049,628
radial ports through the valve bushing in di?er
ent combinations.
In order to shift the valve member til it has
extending therefrom a stem in which is formed
a transverse groove or slot 372 receiving the ball
end 313 of a valve shifter lever 31%. ‘ The valve,
shifter lever Sid is pinned or otherwise secured to
a shaft 3'85 oscillatably or rotatably mounted in
suitable bearings provided by the valve casing 3 it.
10' Additionally pinned or otherwise secured to the
shaft 315 is an arm 3% having its reduced or ball
end 311 received in a groove or slot 318 formed
in one end of a rod 31s. The rod 319 is mounted
in suitable bearings for sliding movement rela
it tive thereto provided by the valve casing 356 and.
is further provided at its outer end with a slot or
groove 386.’ Received in the slot or groove 3%
is the reduced or ballend 333i of an arm 3&2 se
cured to a pivot pin 383 oscillatably journaled in
the table supporting plate 39. The pivot pin 383
has further keyed or otherwise secured thereto
a plate 3% having formed in its periphery a slot
335 to provide shoulders 3% and 387. The plate
at
385% is additionally provided with a pair of v
notches, the adjacent sides of which terminate at
the apex of a conical point 388.
the valve mechanism 326, pipe or ‘conduit 355 and
pipe or conduit 283 to the valve mechanism I 28
where it is connected with the sump or tank
through the circuit above described/
The foregoing description deals with the hy- 5
draulic circuit with the valves in the position
shown. Assuming now that the valve mechanism
338 is not in the position shown but in the position
with the valve member to the left of the position
shown and the work piece therefore unclamped, 10
under these circumstances the table will oscillate
a certain ‘amount and the ?ow will be as follows:
From the pipe or conduit M2 to the ‘pipe or con~
duit 358 into the valve mechanism'338 and valve
mechanism 3% simultaneously. The ?ow from 15
the valve mechanism 338 is at this time out o?
from the flow in the pipe or conduit 356 so that
the ilow will therefore be from this pipe or con
duit 356 into the valve mechanism 35d. The ?ow
from the valve mechanism 35s is by way of pipe at
or conduit 36!! to the valve mechanism 338 where
upon it is connected with the pipe or conduit 362
and the cylinder 65. This, of course, effects the
operation of the piston dd therein for initiating
the indexing of the work supporting table. As 25 I
soon as the table has indexed a small amount the
valve member of-the valve mechanism 356 is shift
ed, thereby cutting o? the flow between the said
in a clockwise and a counterclockwise‘direction. ~ valve mechanism 35% and pipe or conduit 38! and
50 The said dogs are respectively. actuated in the stopping the movement of the piston M and there- 8%
fore the table until the work is clamped and the
directions above indicated by spring loaded plung
ers 3st and 392 which normally hold said dogs in valve mechanism 338 properly actuated. From
a position to provide a non-yielding dog point see this it will be seen that'the work table’s oscilla
and 3% which are adapted to respectively engage tion may be initiated whether the work is secure- _
'
lid
as the shoulders 38% and it? on the plate 8% for ly clamped in position or not.
Due to this interconnection, of the valves the
eilecting its operation .or oscillation. Cooperat
ing with the V notches and conical lug 38d of the valve mechanism 32d may be actuated upon the
plate are is a pivotally mounted spring loaded dog releasing or unclamping of the ?nished work piece
3% which in e?ect provides a spring loaded ?ring without interfering with the iiow of the ?uid
through the system. This will be appreciated
dog,
By reference to Figure 13 it will be noted that fromFigure 16 because the valve mechanism 338
oscillation of the work table iii in a clockwise is connected directly with the valve mechanism
direction will cause the dog point 3% to engage 35% and lay-passes the other valve mecha
the shoulder see and oscillate the plate 8%. This ni'sm 32%, while the valve mechanism 326 is like
movement of the plate carries with it thearm or wise directly connected with the valve mechanism 45
lever 3&2 causing the free end dbl to take up the ttd and by-passes-the valve mechanism 339. The
lost motion in the slot std and the load and ?re operation of the parts for indexing to the right is
dog 81% to rideup to the apex of the conical lug substantially the same as that just described ex
sec of the plate set. Sulntantially at the time cept that the pressure at this time is ?owing
the lost motion in the slot 3th is taken up the through the pipe or conduit 2E3 instead of the
load and ?re dog 3% is at the ‘apex of the lug ass, pipe or conduit 2 B2.
c
,
It should be noted that while the various con- '
whereupon the spring plunger causes the said
dog to ‘descend from the said apex and shift the nections between the ports, and particularly 35b,
lever 3&2 and therefore the rod 319, which through 3%,.359 and'tti, have been described as pipes or .
levers tit and are actuates the valve member conduits these may be, and in effect are, merely
is the
' interdrilled ports in the main valve block as de
Mi.
By reference to Figure 16 it will be noted that scribed in detail above in connection with Figure
the ports 526i, 366, 3th and 36d of the valve mech .14.
anism the have respectively connected therewith
What is claimed is:
»
I
i. In avdupleii broach of the class described the dd
the pipes or conduits 35s, 5555, 356 and set.
The operation of the modi?ed construction in? ‘ combination ‘with a pair of reciprocating'broach
volving valve mechanisms 32d, 38d and 356 is as rams, oi’ hydraulic means for e?ecting the opera
follows: With the valve members of the said valve tion of said rams, an oscillatable work supporting '
table adapted to have secured thereto a pair of
mechanisms in the positions shown and assum
ing that the table safety valve mechanism 52d work pieces, means for oscillating the table for as
has been thrown to connect the hydraulic pres alternately presenting a work piece to the broach
sure through said valve mechanism with the pipe rams, power actuated means for securing work
' ‘Secured to the table Qli is a pair of dogs tddand
398 respectively pivotally mounted for oscillation
or conduit M2 the flow of the medium will be as
follows: Through the pipe or conduit M2 and the
70 pipe or conduit 3%, valve mechanism 3% and pipe
or conduit sea to the left hand end of the table
cylinder 435. This causes the table ‘to be oscil
lated in a counterclockwise direction and the
‘medium behind the piston lid is exhausted from
the cylinder as through the pipe or conduit ddll'to
pieces to a table, control means therefor and valve
means operable to stop the operation of the rams
when the control means are in work releasing to
position.
2. In a breaching machine of the class de
scribed the combination of a pair of broach rams
adapted to be alternately actuated through a cut
ting and an idle stroke, an oscillatable table, is
10
2,049,623
means for securing a pair of work pieces to the
table for alternate presentation to the broach
rams when traveling through their cutting
strokes, a hydraulic circuit for- actuating the
broach rams, means for securing the work pieces
to the table, and a valve operable by the work
securing means to interrupt the operation or the
hydraulic circuit when the securing means are in
releasing position.
3. In a breaching machine or the class de
scribed the combination of a pair of reciprocat
10
scribed the combination of a pair of ‘broach rams,
means for e?ecting a continuous cyclic move
ment of said rams through a cutting and an idle
stroke, an oscillatable work supporting table for
supporting a work piece for each ram and oper-
5
able at the conclusion of each cycle of operation
of the rams, means for securing each work piece
to the oscillatable work table, means operable
with the last mentioned means for automatically
stopping the cyclic operation of the rams unless 10
the work pieces are properly secured to the table,
ing rams, an oscillatable table adapted to support I including a valve in the hydraulic circuit for -
a pair of work pieces and operable for presenting
interrupting the ?ow therethrough, and a single
one piece to one ram and the second piece to the
15 other ram, a work ?xture for each work piece on
means for actuating the work securing means and
the table, independent means for actuating the
work piece ?xtures to release the ?nished work
8. In a breaching machine the combination of
a pair of breaching rams each adapted to be actu
ated through a cutting stroke while the other is
passing through an idle stroke, the movements of
the rams constituting a complete cycle during
which a work piece is machined, automatic means
for effecting a continuous repetition of said cycle,
an oscillatable-work table adapted to support a
pair of work pieces, one for each of said rams and
for presenting the work pieces to the ram passing
piece in one ?xture and secure an un?nished
work piece therein, and means operable with said
20 last mentioned means to stop the tooling move
ment of the ram unless the work piece ?xture
therefor is actuated into work securing position.
4. In a broaching machine or the class de
scribed the combination of a pair of broach rams,
25 means for effecting a continuous cyclic move
ment oi‘. said rams through a cutting and an idle
stroke, an oscillatable work supporting table for
supporting a work piece for each ram and oper
able at the conclusion of each cycle of operation
30 of the rams, means for securing each work piece
to the oscillatable work table, and means operable
with the last mentioned means for automatically
stopping the cyclic operation of the rams, when
the securing means are in releasing position.
5. In a broaching machine of the class, de
scribed the combination of a ?rst ram, a second
ram, means for simultaneously actuating said
rams, one through a cutting stroke while the
other is being actuated through an idle stroke,
hydraulic means for effecting the cyclic move
ment of the rams, a work supporting mechanism
operable at the completion or each cycle of move
ment of the rams for retracting the ?nished work
piece from the ram passing through the idle
valve.
_
15
through its cutting stroke, a work supporting
?xture for each work piece on the table,,power
operated means for securing each work piece in
its ?xture, and ‘means operable with the work
securing means for interrupting the continuous
repetition of the cycle and stopping the ram at
the end oi’ the cycle when the securing means are
released.
»
9. In a breaching machine the combination of r
a pair of broaching rams each adapted to be 3°
actuated through a cutting stroke while the other
is passing through an idle stroke, the movements
of the rams constituting a complete cycle during
which a work piece is machined, automatic means
for effecting a continuous repetition of said cycle, 40
an oscillatable work table adapted ‘to support a
pair of work pieces, one for each of said rams and
for presenting the work pieces to the ram pass
ing through its cutting stroke, a work supporting
?xture for each work piece on the table, power
to the ram passing through the cutting stroke, ' operated means for securing each work piece in
control means operable to secure each work piece its ?xture, means operable with the work secur
to the work supporting means, and means oper
ing means for interrupting the continuous repe
able with the last mentioned means {or stopping tition oi.’ the cycle and stopping the ram at the
50 the movement of the rams at the completion of end of the cycle when the securing means are
a given cycle of movement unless the control released, and means for effecting the oscillation
means are in work securing adjustment.
of the work supporting table at the conclusion of
6. In a broaching machine of the class de
‘each cycle of the machine.
45
stroke and advancing an un?nished work piece
55
ram, means for simultaneously actuating said
rams, one through a cutting stroke while the
other is being actuated through an idle-stroke,
hydraulic means for e?'eoting the cyclic move
ment of the rams, a work supporting mechanism
scribed the combination or a ?rst ram, a second
' operable at the completion of each cycle of move
ment of the rams for retracting the ?nished work
piece from the ram passing through the idle
stroke and advancing an un?nished work piece
to the ram passing through the cutting stroke,
65 means operable to secure each workpiece to the
work supporting means, means operable with the
last mentioned means for stopping the movement
of the rams at the completion or a given cycle of
movement unless the work pieces are, properly
70 secured to the work supporting mechanism, and
means for preventing the operation 0! the work
securing means until the work supporting means
has been retracted a given amount from the
broach ram.
7
g
7. In a broaching machine of the class de
10. In a breaching machine the combination
of a pair of broaching rams each adapted to be
actuated through a‘cutting stroke while the other
is passing through an idle stroke, the movements
of the rams constituting a complete cycle during
which a work piece is machined, automatic means
for effecting a continuous repetition of said cycle, 60
an oscillatable work table adapted to support a
pair of work pieces, one for each of said rams and
for presenting the work pieces to the ram passing
through its cutting stroke, a work supporting ?x
ture for each work piece on the table, power op- 65
‘erated means for securing each work piece in its
?xture, means operable with the work securing
means for interrupting the continuous repetition
of the cycle and stopping the ram at the end of
the cycle if the work pieces are not securely 70
clamped in their work ?xtures, means for effect
ing the oscillation oi the workv supporting table
at the conclusion of each cycle of the machine,
and means preventing the operation of the work
supporting ?xtures until the work piece being‘
‘El
2,049,628
~operated upon has been retracted a‘ given dis-'
tance from the ram.
.
11. In a breaching machine of the class de
scribed the combination of a pair of broach rams
each operable through a cutting stroke while the
other is operable through, an idle stroke, an oscil
able by the table for continuing the indexing of
the table upon the operation of the work clamp
ing means.
~.
,
16. A duplex broaching machine including a
bed, a pair. of broach rams movable on the bed in 5
opposition one to the other, work supporting
latable work supporting table, a-?rst work ?xture means having portions individual to each ram
secured to the table for presenting a work piece , for presentation of a work piece to the ram dur
ing the broaching stroke thereof, means for shift
to one of said rams, a second work ?xture se
cured to the table for presenting a'work piece to ing the work support means to retract same with 10
the other ram, each of said work ?xtures include respect to the ram during the non-tooling stroke
ing power operated means for securing the work thereof, means for e?ecting power clamping of
therein, means for oscillating the table, means the work by the work supporting means, a man
for e?'ectlng the reciprocation of the rams, means ual control for said power clamping, and means
operable by the rams for energizing the table operable by said manual control for interrupting
operation of the broach when the manual'con
‘oscillating means, and means operable to pre
vent the oscillation of the table unless each work trol is in work releasing position.
‘ 17. A duplex broaching machine including a
?xture is in a work clamping position.
bed, a pair of broach rams movable on the bed in
12.‘ In a broaohing machine of the class de
opposition one to the other, work supporting 20
20 scribed the combination or a pair of reciprocat
ing broach tools each adapted to be actuated means having portions individual to each ram
through a cutting stroke and an idle stroke, an for presentation of a work piece to the ram dur
oscillatable work supporting table for presenting ing the breaching stroke thereof, means for shift
a work piece to said rams during a cutting stroke, ing the work support means to retract same with
25 a work supporting ?xture on said table for each respect to the ram during the non-tooling stroke 25
work piece, power means for securing a work thereof, means for e?ecting power clamping of
piece in the ?xture, individual controls for‘ the the workby, the work supporting means, a mum
' power means of the respective ?xtures, automatic
means for actuating the rams and oscillating the
30 table, and means associated with the controls for
stopping the oscillation of the table if a control
is in releasing position. -
'
13. In a broaching machine of the class de
scribed the combination with a pair of reciprocat
35 lng broach rams, of means for actuating said
rams respectively through a cutting and an idle
stroke,
including
hydraulic
a hydraulic
means
circuit
for actuating
and a piston
the asso
‘can
ciated with each ram, a table oscillatably mount
ed adjacent said rams and adapted to support a
pair of work ?xtures, one for each ram, hydraulic
means for oscillating the table, valve means oper
able by the rains for irritating the oscillation of
‘ the table, valve means operated by the table for
45 initiating the movement of the rams, and addi
tional valve means associated withthe ?xture
operating means for interrupting the circuit and
stopping the oscillation of the table unless a work
piece is secured in the ?xture.
it. In a breaching machine of the class de
50
scri
the combination of a pair of reciprocating
broach rams, each ram adapted to be alternately
actuated through a cutting stroke, an indexable
table operable between a loading position and a
55 cutting position for presenting a work piece to
ual control for said power clamping, means oper
able by said manual control for interrupting op
eration of the broach when the manual control 30
is in work releasing position, and means prevent
ing releasing movement of the manual control
when the individual work holding means is in
operative relation to its ram.
18. A duplex broach including a bed, a pair of 35
vertically reciprocating broach rams carried
thereby, breaching means operable by the rams,
work supporting means alternately movable to
ward and from the respective rams, each of said
work supporting means including a manually ac
tuable work clamping mechanism, means for ef
footing continuous cyclic movements of the parts
including alternate presentation of the respec
tive work piece holders to their individual broachf
ing rams and successive broaching movements of
the rams with respect to their associated work
piece holders, means operable by the manual
clamp control when in work releasing position
for interrupting the cycle of movement of the
parts, and means for preventing actuation of 50
the manual control when an individual work
piece holder is in operative relation to its ram.
19. a duplex breaching machine of the char
acter described including a bed or support,
a pair of broaching rams carried thereby and 55
alternately shiitable through a breaching stroke,
each rain prior to its movement through a cut
ting stroke, a work
ture for each work piece ' means for cheating movement of the rams,
on said table, means for securing the work in its an oscillatable work supporting table having
?xture, means for indexing the table, and means work supports individual to the respective rams,
means for e?ecting an oscillation of the table to 6%
operable by the work clamping means for pre
present one or the other of the work supports to
venting the indexing of- the table when the secur
its associate ram during the tooling movement of
ing means are in work releasing
ustment;
15. In a breaching machine of the class do». the ram, means including an hydraulic circuit
scribed the combination of a pair of reciprocat~ ior e?ecting successive movements of the rams
and work supports in predetermined cycle, indi- $5
65 lng broach rams, each ram adapted to be alter=
tely actuated through a cutting stroke, an vidual manually controllable means for clamp
ing and unclamping the work piece in the re
indexable table operable betwen a loading posi
tion and a cutt
position for presenting a work spective supports, a stop valve in the hydraulic
piece to each ram prior to its movement throh circuit, and individual operating connections
70 a cutting stroke, a work ?xture for each work from the respective clamp controls to the valve 70
piece on said table, means for securing the work for shifting the valve into stop position for inter
in its ?xture,
1":- a for inde mg the table, it
operable by the work clamping means for stopping
the indexing of the table unless a work piece is
$5
ruption of the cycle when either of the indi
vidual control means is shifted to work releasing
position.
ao. a duplex broac
machine of the 0- i5
12
2,049,628
acter described including a bed or support, a pair
0! broaching rams carried thereby and alter
nately shiftahle through a breaching stroke,
means for e?ecting movement of the rams, an
oscillatable work supporting table having work
supports individual to the respective rams, means
for effecting an oscillation of the table to present
one or the other of the work supports to its asso
ciate ram during the tooling movement of the
10 ram, means including an hydraulic circuit for
eil’ecting successive movements of the rm and
work supports in predetermined cycle, individual
manually controllable means for clamping and
'unclamping the work piece in the respective sup
ports, a stop valve in the hydraulic circuit, indi
vidual operating connections front the respective
clamp controls to the valve for shifting the valve .5
into stop position for interruption of the cycle
when either of the individual control means is
shifted to work releasing position. and means
for reversely shifting the stop valve when the
work has been clamped.
.
'
mwm G. ROEHM.
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