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Патент USA US2575507

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Nov. 20, 1951
F. J. WRIGHT
2,5 75,504
HOT PIN HEADING MACHINE
Filed Jan. 18. 1949
8 Sheets-Sheet l
Nov. 20, 1951
F. J. WRIGHT
2,575,504
HOT PIN HEADING MACHINE
Filed Jan. 18. 1949
s sheets-sheet 2
_Il
|
.1.
26
'___
Nov.7 20, 1951
F. J. WRIGHT
2,5 75,504
HOT PIN HEADING MACHINE
Filed Jan. 18. 1949
8 Sheets-Sheet 5
E127. 5
To AIR
SUPPLY
/NVE/v TOR;
FRED JAA/mem,
ÄTTDK
NOV. 20, 1951
l:-~ J_ WRlGHT
2,575,504
HOT PIN HEADING MACHINE
Filed Jan. 18. 1949
8 Sheets-Sheet 4
Lui „L2
.
P
NOV' 20, 1951
F. J. WRIGHT
2,575,504
HOT PIN HEADING MACHINE
Filed Jan. 18. 1949
8 Sheets-Sheet 5
Ely. 9
O
ATT».
Nov. 20, 195,1
F. J. WRIGHT
2,575,504
HOT PIN HEADING MACHINE
Filed Jan. 18. 1949
8 Sheets-Sheet 6
„Ka/Vm,
ÁTT'Y,
Nov. 20, 1951
F. J. WRIGHT
2,575,504
HOT PIN HEADING MACHINE
Filed Jan. 18. 1949'
8 Sheets-Sheet '7
/N Vm T o R,
FRED J. WxQlGl-rr,
ÁTTpY.,
Nov. 20, 1951
F. J. WRIGHT
2,575,504
HOT PIN HEADING MACHINE
Filed Jan. 18. 1949
8 Sheets-Sheet 8
150
14S
I
Patented Nov. 20, 1951
2,575,504
UNITED
¿PATENT OFFICE
2,575,504
HOT PIN HEADING MACHINE
Fred J. Wright, Columbus, Ohio, assignor to The
Jeffrey Manufacturing Company, a corporation
Application January 18, 1949, Serial No. 71,465
13 Claims. (Cl. 10--11)
1
2
This invention relates to a pin heading machine
adapted to take round bar stock of predetermined
Fig. 12 is a side elevational View of the device
of Fig. 11 and associated parts of the pin heading
lengths, to heat one end thereof, and to form the
heated end into a head, the machine being auto
machine;
matic in operation and merely requiring the feed
ing of the pins thereto.
An object of the invention therefore is to pro
of Figs. 11 and 12;
hereinafter, the novel features and combinations
being set forth in the appended claims.
they have certain important characteristics in
common, while in other important characteristics
Fig. 13 is a front elevational View of the device
'
Fig. 14 is a view, similar to Fig. l2, with parts
broken away, and with the lower die in a dif
vide an improvedmachine of the above mentioned
ferent position, showing particularly the operation
type in which various operations are performed to
of the hold-down mechanism in cooperation with
heat the pin at one end, carry the heated pin 10 a pin just prior to the pin’s being received by the
to dies, clamp it in position and then form a head
lower die; and
on the heated end, thereafter ejecting it and re
Fig. 15 is a piping diagram of the pin heading
peating the operation, which is all automatically
machine of Figs. 7 to 10, inclusive.
and continuously performed.
In the accompanying drawings there are two
Other objects of the invention will appear 15 specifically different machines disclosed, though
In the accompanying drawings,
,
Fig. 1 is an elevational view showing one form
of the pin heading machine involving my inven
tion, with emphasis particularly on the clamping
and head forming dies and actuating hydraulic
they are diüerent.
Referring ñrst to the machine illustrated in
20 Figs. 1, 2, 3 and 4 of the drawings, it includes a
main frame 20 which includes a continuous en
circling framework having a large central open
ing 2| within which the heading operation on the
Fig. 2 is an elevational View of the machine
pins takes place. Rigidly attached to the' main
taken at right angles to Fig. 1, with parts in sec 25 frame 2E! and in the bottom of the opening 2|
tion, showing the induction heating mechanism
there is a supporting or guide block 22 formed of
for the pins as well as the guiding and feeding
two parts, removably connected together, which
means therefor, together with the clamping and
receive and hold a reciprocating die block 23,
heading dies;
which die block 23 is mounted for reciprocating
Fig. 3 is an enlarged sectional view showing
motion. This reciprocating motion is supplied by
particularly the relation of the holding dies and 30 a double acting air cylinder or motor 24 carried
associated limit switches, together with the pin
by a platform 25 which is rigidly connected to the
ejecting mechanism and the reciprocating carrier
top of a hydraulic tank 26, all of which is rigidly
for the lower die;
attached to the main frame 20.
Fig. 4 is a plan view showing particularly the in
The die block 23 carries a removable lower
duction heating mechanism for the pins to be 35 clamping die 21. It is evident that the die blocks
23 and lower clamping die 2'| are adapted to
headed;
.
Fig. 5 is a piping diagram of the hydraulic
reciprocate in a horizontal plane. The lower
»circuit of the machine of Figs. 1 to 4;
clamping die 2'| is provided with a transverse
Fig. 6 is an electrical wiring diagram of the
semi-cylindrical pin receiving groove 28 adapted
machine of Figs. l to 5;
ì
to receive a pin 29.
Fig. 7 is a view, similar to Fig. 1, of a modified
Above the guide block 22 and rigidly attached
form of pin heading machine;
to the main frame 20 there is a vertical guide
Fig. Sis a view, generally similar to Fig. 2, of the
block 3D which receives and guides a die block
modified machine, in which the induction pin
3| which is mounted therein between relatively
heating mechanism is not shown;
removable parts, being carried on opposite sides
Fig. 9 is an enlarged sectional view showing the
thereof for vertical or up and down reciprocatory
ejecting mechanism of the machine of Figs. '7
motion. Die block 3| carries a removable upper
and 8;
clamping die 32 on the bottom thereof, which
Fig. l0 is a view showing the upper and lower
clamping die 32 is provided with a semi-cylin
clamping dies, a headed pin stripping device,
drical pin receiving groove 33. The clamping
and the mechanism for supporting and reciprocat
dies 2l and 32 under one condition are adapted
cylinders therefor;
ing the lower clamping die;
Fig. 11 is an enlarged plan view showing par
ticularly a hold-down device for the pins and its
association with the heating mechanism;
to be positioned so that the grooves 28 and 33
are in alignment and cooperate to effectuate a
clamping of a pin 29 during a heading operation,
as hereinafter described. The die block 3| is
2,575,504
3
4
above stated, it will fall by gravity down a guide
carried at the bottom of a piston head 34 of a '
double acting hydraulic cylinder or motor 35
chute 49 which includes what is in effect an eX
carried adjacent the top of the main frame 20.
tension of the plate 132, an extension of the top
guide plate 134, and an extension of the guide bar
£3, together with an adjustable guide 53 Which
is adjacent the heated end of the pin 29. (See
Fig. 4.)
On one side the main frame 2û carries a double
acting pin heading cylinder or motor 36 which
has a heading tool or die 31 connected to the
piston rod thereof, which tool or die 31 has a pin
head forming recess "33 on‘the right hand or
outer end thereof.
The yoperation-foi the machine, together with
The axis of the horizontal
various valves and limit »switches'c‘ontrdllcd by it
motor or cylinder 38 is through a Vertical plane " is described hereinafter in connection with the
-description of a complete cycle of operation which
which bisects the groove 33 of die 32. In align
ment with the heading tool 31 and onthe'opposite Y
is-.described 4in conjunction with a description of
side of the dies 21 and 32 there is a bucking tool
Figs. 5 and 6 of the drawings.
or head 39, carried by the rma'in )f1-‘ame L20, >which
cooperates to take the axialfthrus't-from >‘aß-pin >1219
'.Itïîis evident, Ihowever, that the heading oper
ation "will atake place on a pin 2S when it is
clamped between -the dies 21 and 32. When a
@1m29 'hastbeen .headed the die 32 will be lifted
While the head is being formed by the tool or
die 31.
~ '
’
Adjacent one side of the main frame 26 and
upon the platform 25 there is a combination A'pin
from the die 21 by elevating the die block 3|,
"whereupon the die block 23 together with the die
21 Will be reciprocated rearwardly, or at right
#angles .ito the yaxis of v:movement :of »die y32; and .die
heating and feeding mechanism 4U by which the
>mnheaded îpins :are îfed :through :an induction
.heater-.sothat-oneaend of «themzis heated so "that
a head may be formed thereon by the .heading
mechanism, a >heated pin lbeing 'carried to and
received by the reciprocating lower «,‘clamping die
:'»tool 2:1îby -whic'h ‘It is '.Íe'd .to .a clamping and
-h'eading position, ìas .fhereinafter vdescribed more
completely.
-
ïblock'S I, to receivesanotherheatedfpin. :During
this-rearward or 'feeding reciprocating .movement
of 'fthe . block 23 4the ~headeo1 :pinfZ’S ’will be .ejected
l; wby «a ‘bell :crank :lever .5I .which :is 1pivote-:fd tothe
die block 23 about a horizontakaxïisandr-is biased
'by :a -spring 152 >so that one farm of Ithe vïlever 5i
rnormally rests fon 'a Apin-53 also fcarrie'd `:by ¿the
‘The‘pinfheating andïeeding mechanism [email protected] in
.'cludes ‘.a‘fram'e '4I v.which ¿is :generally joox >type »and
has an upwardly sloping top plate s2. ll’ins '2'9
¿block '23. As kthe block £23 :moves "to Íthe `áriglit,
»as viewed lin Fig. 3, thelnorm'ally upstanding arm
fito ‘.b'e ihead'edtare i. guided along >a rchute provided
by the feeding mechanism .kill Vwhich 'includes vthe
pivoted lever [email protected] which 'is `pivota‘lly -fattachedîto
'top iplate .'42 vupon‘which’the vpins lare supported
.an-amide, together .withran :adjustable vpin guid
mally held against -a stop ¿55, Tcarried ¿bly ïbloc'k
3i, by a spring "56 ‘attached Avat-‘one -end'ïto c:said
of thelever fEä will ìbecaughtby one ‘wing :of 'a
'the ~upper die block T31 and ïh'a‘s Íone wing Lnor
Ling 'bar 143 which I‘extends îalong :one end -of :the
blocks-i.
‘pins 129 .fand adjacent vwhich `they lgenerally .abut
while sliding over the plate 42.
Y
Y
»
»
'
During the reverse travel vof «the y‘block 12.3 ’the
upstanding arrn-’o'f the ibe'illcrank 'lever til, upon
As .viewed in ¿Eigmé of ithe drawings, `.there is
an adjustable top .guide .plate .'34 which ‘loosely
-contacting the downwardly v'extending wing of
the lever 523, -will -swing it `raga'inst'ïthe ftens'i‘onfof
4clamps .thezpins‘29 `ín‘ place :while permittingtheir
-lfreesli‘ding .movement .over the 'plate ¿132, rsimul
taneously .maintaining .them :in ¿adjacent ‘stacked
positions as illustrated‘in’i‘ig. 2rof Cthe-drawings.
As ‘viewed in Fig. ‘.4 :of the drawings, only .ap
>proXimately the flower two-thirds of each. pin’259 I. Cl
ïrides on -:the #plate >«l2 :and is îbelowith'e guideplate
"44. '.'ll‘he upper ione-'third of .reach pin, v'as ‘.Viewed
fin said‘Fig. ‘4, ¿(which fis :actually rin ya lhoriáontal
position), lextends "freely beyond the supporting
the spring :lit 'to re-set »theeje'ctingzmechanism
Attention is now directedparticularlyfto Figs.
5 and 5 of the drawings which‘willlbe described
in connection «with a 'complete cycleo'f opera
>tion of the complete unit. To »start 4the'fun‘it '11n
operation the switch MS'I‘QFigxöì) is=closed which
>energizes >relay Ci 'over an obvious -circu'it ffrom
energized lines or conductors yLI and L2. Asig
nal lamp 51 is energized when switch TMSI `Ais
closed, to designate its iclosed condition. Relay
CI, on energizing, -closes the Vcircuit 4to the high
ypla'tef42 '.andnthe :guide plate M .fand into a U- '
:shaped îlongitudinal channel of :an induction
-frequency induction unit 58 through a Astep-up
transformer, energy being «derived from ~a high.
frequency source, such as the "Tocco irri” yunit
"heating unit '115 `so 'that one >.of fthe .ends -.of .each
of the pins 29 is subject ¿to high frequency »elec
` îth'efltop
Itni'cál induction
Ito ‘the .bottom
heating,
.of .the
.fas îthe
Aplate
>pin42,»a‘sïherein‘travels ¿from ‘ -' previously mentioned.
Switch MS2 is then closed which `energires 4Vre
lay CZ over conductor 59 and the normally closed
contacts of'relay [email protected] andthe vcontacts of a'ilimit
iafterrdescribed. 'The'.heating Vunit t5 Vmayïbe iparît
:o'f Jany standard fhigh if-requ'ency induction :elec
etri'cal èh'eating lunit -such fas that sold under .the
ítrad'e inamefof “Blocco îJrï’ This ¿type .of 'heating
is preferred because it tends `to concentrate ïthe
inenting of .thep'in .fat itheî'head lend which iis to
»1re 'upset ito ¿form «a pin lhead.
Eßhe `ft'opmost vof the 'pins ‘29 .mayîbe .fed by hand
lfor mechanically, :as §desired,fas.eac‘h heated :pin is
ëfed ’from >:the bottomof :the stack. To :feed a pin
’from îthe `:bottom :of -a ¿stack :a ‘.pivoted "feed ïlever
#i 'is provided ‘which 'is carried ‘by >the frame «el
Y fand '.«is .actuated lvby va ‘double acting air cylinder
‘or imotor <’41 to lpus‘h >‘on the ltop pin 29 -o'f the
:groupfc‘f pinscarried on the piatefdä. This push
switch LSB, which ,limit switch LSB iis‘a‘ssocia'ted
4with and operated by the Vhydraulic icylinder or
.motor 2è when said cylinder or 'motor §24 ‘is in
à,
its -“out” 0r pin receiving position which is 'the
.physical .relation of the mechanical parts at _the
.start cfa cycle vof operation.
Relay C2, on `energizing,.closes 4a .hold .circuit
VVfor vitself `which extends `fromline LI _through the
Ynormally closed vcontacts .of limit switch .LSI Ato
the upper contacts of relay C2, thence by con
ductor [email protected] through ‘the `normally vclosed contacts
-r'leten't @8 rwhich normally holds ïthe :pins VA29 in
of a push button PBL-thence to one terminal of
lthe solenoid .of relay C2.
At its lower contacts, relay :02, ¿upon .ener
gizing, .energizes solenoid :Sal Iover :an :obvious ïcir
.the‘iposition illustrated íin`Fig. 2 ofthe drawings.
cuit. ¿Solenoid .S I , `on energizing, .controls .a valve
ing .on the top pin vwill lpi-'ovide sufficient force
itc force »the lower pin 23 Aover a spring-pressed
Whenever the lcwermost pin-29
`~releasexi, -aä
»5I (see Eig. l5) fso :as to:supplyyairlunderpressure
\
2,575,504.
5
to the head or left-hand end of cylinder 41 to
cause its piston and piston rod to move to the
right, as viewed in Figs. 2 and 5 of the drawings.
This actuates the previously described feed lever
46 to feed the lower heated pin 26 down the
guide or chute 49 into the lower clamping die
21 which is positioned directly below said chute
49 to receive it, as illustrated in dotted lines in
Fig. 2 of the drawings.
Cylinder or motor 41, in operating, actuates
of the coil of which is connected directly to the
line L2. The circuit for relay C3 is the same
up to the conductor which branches off relay
C6, which conductor is extended to one terminal
of the winding of relay C3. The other terminal
of the winding of relay C3 is extended by con
ductor 64 to the line L2.
Relay C6, on energizing, energizes solenoid
S3 over both of its contacts.
Solenoid S3 ener
gizes a four-way hydraulic valve 65 (see Fig. 5)
which when in its neutral position, to which it is
switch LSI which opens its normally closed con
spring-biased, provides a normal no-load by
tacts and closes its normally open contacts, the
pass for a hydraulic pump 66 which derives
former breaking the above described holding cir
hydraulic ñuid from the tank 26, the return ñow
cuit for relay C2, which thereupon drops out
and de-energizes solenoid SI. The air valve 16 from the by-pass into valve 65 being by way of
pipe or conduit 61. A protective pressure relief
6| is biased so that when solenoid SI is de
valve 68 is also preferably provided for the pump
energized it moves automatically to divert the
66.
air to the piston rod or right-hand end of the
When solenoid S3 is operated, as aforesaid, the
cylinder 41 which will return the piston and piston
hydraulic iiuid delivered by the pump 66 to con
rod thereof to its pin feeding position, as illus
duit, pipe or line 69 is delivered by conduit or pipe
trated in Fig. 2 of the drawings.
10 through a sequence valve 1I to a fluid actuated
The normally open contacts of switch LSI, on
four-Way valve 12 lwhich shifts its spool to con
closing, energize relay C5 over an obvious cir
nect the piston rod side of the cylinder 35 to con
cuit which includes the normally closed contacts
of switch PS2 which is a pressure responsive
switch in the hydraulic circuit, as hereinafter
1 duit, pipe or line 13 which circulates the oil on
the piston rod side of the cylinder 35 to the piston.
head sideA thereof to effect a speed-up operation
thereof. Four-way valve 12, in operating, also
a holding circuit for itself over the normally
connects a hydraulic pipe, conduit or line 14 to
closed contacts of limit switch LS2 which is con
the tank conduit, pipe or line 15.
trolled by the die block 23.
Sequence valve 1I will operate under a rela
The two lower contacts of the relay C5 close
tively low pressure, such as one hundred and fifty
lan obvious circuit to solenoid S2 to energize it.
pounds per square inch which is adequate to shift
Solenoid S2 controls a valve 62 (see Fig. 5). The
the spool of four-way valve 12. As soon as this
valve 62 thus being actuated delivers air under
pressure to the double acting cylinder 24 to move 35 pressure is developed in the line 16, the hydraulic
fluid therein will be diverted to pipe, conduit or
it to the left, as viewed in Figs. 2, 3 and 5 of the
line 16 and through sequence valve 11, flowing to
drawings, which will feed the pin 23, carried in
the head end of cylinder 35 which expands, mov
the lower die 21, inward or to the left, as viewed
ing the die block 3l and upper clamping die 32
in said figures, until said die 21 is positioned
downward, clamping the pin 29 between the dies
directly below the die 32, with the two grooves
21 and 32. In other words, this effects a clamping
28 and 33 in alignment.
of a pin to be headed, between the upper and
When the lower or bottom die 21 reaches its
lower or top and bottom dies 21 and 32.
inward position, as above mentioned, the die
The sequence valve 11 will operate in response
block 23 will actuate limit switch LS2 to close
its normally open contacts and open its normally 45 to relatively low pressure, such as two hundred
and ñfty pounds per square inch, which will be
closed contacts. Bridging the normally closed
developed after cylinder 35 is expanded, as above
contacts of limit switch LS2 is a manual switch
set forth. The circulating circuit above described,
MS3. If switch MSS is not now closed, relay
provided by the four-way valve 12, will produce
C5 is de-energized, as is solenoid S2, and valve
62 is spring-biased so that it automatically 50 high speed operation of the cylinder 35.
When sequence valve 11 opens, the hydraulic
reverses itself, causing cylinder 24 to reverse,
fluid in the line 16 will be diverted by way of
which ejects this pin without heading it and
pipe, conduit or line 18 to the head end of head
positions the die 21 to receive another pin. This
ing cylinder 36 which will move the piston rod
operation is desirable in case a pin 29 has been
and heading tool 31 to the right, as viewed in
Afed which has not been heated, as frequently
Figs. 1 and 5 of the drawings, forcing the heading
will happen during the starting of the machine
tool 31 against the heated end of the pin 2S, the
in operation.
opposite end of which will abut the bucking tool
For normal and automatic operation of the
or head 38. At this time the piston rod end of
unit, switch MSS will be closed. Under such
the cylinder 36 is connected to tank over line 14.
conditions, relay C5 will have a holding circuit
It is intended that a relatively high pressure
which extends through switch MS3 over an
will be developed in lines 15, 16 and 13 during
obvious conductor to the second contact from
a heading operation and once the head is formed
the top of said relay and through normally closed
this pressure will actuate the pressure responsive
switch PS2. Under these conditions the lower
65 switch PSI which may be set to operate at a
die 21 will be held in its “in” position.
pressure in the neighborhood of two thousand
On closing the normally open contacts of limit
pounds per square inch.
switch LS2, as above described, relays C3 and
When the normally opened contacts of pressure
C6 are energized in parallel over the now closed
switch PSI are thus closed in response to the
contacts of relay C5. The circuit for relay C6
is as follows: through the now closed normally 70 completion of a heading of the heated pin 29
which is clamped between the upper and lower
opened contacts of limit switch LS2 over an
dies 21 and 32, relay C1 (see Fig. 5) is energized
abviousconductor to the upper now closed con
over an obvious circuit including the normally
tacts of relay C5, thence by a conductor 63 to the
closed contacts of pressure responsive switch PS2,
‘ normally closed upper contacts of relay C1, thence
by an obvious conductor to relay C6, one side 75 which are now closed since this switch is con
described. Relay C5, upon energizing, establishes
7
nected to line ‘Hl now connected to dra-ín by’ four
includes a mainframe ,83 which _includes a con
way valve 72.
tinuous encircling framework having a large
central opening 84 within which the heading
operation on the pins takes place. Rigidly at
f
Relay Cl, on energizing, closes a holding cir
cuit _over the second from the top contacts
through pressure _switch PS2. Relay C?, on ener
gizing, de-energizes relays C5 and C3, the hold
ing circuits of which extend over the upper nor
mally closed contacts of said relay C1 as above
described.
_
tached to the main frame 83 and in _the bottom
of the opening 84 there is a supporting or guide
block 85 formed of two parts (see Fig, ,9) re
movably connected together, which receive _and
i hold a reciprocating die block 85, which die block
Relay CE, on cle-energizing, de-energizes sole- .
86 is mounted for reciprocatory motion in a hori
noid S3. Relay'Câ', on die-energizing, de-ener
zontal plane. This reciprocatory motion is sup
Vgizes _relay Cd, unless the Vtimer contacts of a
plied by a double acting hydraulic cylinder or
timer TR1 _are closed, in which _case relay Cd
motor 8l' carried by a pin supporting frame
remains energized until the contacts-of the timer
88 which is Vrigidly attached to the main frame 83.
TRI are opened. Timer TR1 starts into _opera
The die block 86 carries a removable lower
tion when relay _C3 is energized _and continues
clamping die 89. The lower clamping die 89 is
in operation until it breaks its own contacts, the
provided with a transverse semi-cylindrical pin
circuit for it being obvious by reference to Fig.
receiving groove 9i! adapted to receive a pin 9i.
6 of the drawings.
Above the guide block 85 and rigidly attached
When relay C2'v is energized, as above men 20 to the main frame 83 there is a vertical guide
tioned, it also energizes solenoid S4 which con
block S2 which receives and guides a die block
trols the valve B5 (see Fig. 5) to reverse its posi
e3 which is mounted therein between relatively
tion `from that above described; this »valve 55
removable parts, being carried on Yopposite sides
being a self-centering spring-biased valve. Upon
Athereof for vertical ,or up and down reciprocatory
valve 65 vbeing reversed by solenoid Sii, pressure 25 motion at right angles to the reciprocatory mo
from the pump 66 is delivered over line 69 to
tion of the die block 88. Die block 83 carries a
pipe., conduitor line ‘.18 through a `sequence valve
removable upper clamping die @il _on the _bottom
.3B which is similar ’to valve li and" provides a
thereof, which .clamping die 9.4 is provided with
free path to four-way valve 'l2 which ¿is there
a semi-cylindrical pin receiving groove Sii.y The
upon reversed. Sequence valve '88 then Ioperates » clamping dies 88 and Sd under one condition are
to deliver <hydraulic iiuid to pipe, conduit or line
adapted rto be positioned so that thegrooves 90
:81 which retracts cylinders 35 and 35, the'former
and 95 are in alignment (as illustrated in Fig. 10
.by Way of rpipe, ¿conduit or line '82 which fis now
of the drawings), whereupon they may. 'be
«connected -to »conduit '7d by the four-way valve
clamped together to effect a clamping _of .the .pin
12. Conduit 'i3 is now connected to tank conduit ~' 9| during a _heading operation, as hereinafter de
7.5 by four-way valve 'l2 and a check valve built
scribed.
__
into vsequence valve 'I-'I connects conduit ‘1_-8 to
The die block 93 is carried at the bottom of a
conduit 13 and `ultimately to tank, thus'provid
piston head _Se of a double vacting hydraulic cyl
'ing for the ready retractive movement 4of the
inder orr motor Sl carried adjacent the top of the
40 main frame 83. On one side the main frame
4cylinders `3-5>and 3E.
When the cylinders 35 and ‘36 are retracted,
33 carries a double acting pin heading cylinder
pres-sure :in the line 8l _will build up to .operate
or motor .£8 which has a heading tool or die 99
the pressure responsiveswitch PS2 which may be
connected to -the piston rod thereof, which tool
set at a medium pressure, such as ñve hundred
'pounds per square inch. Switch PS2, on operat- .
Yor die 99 has a pin head forming recess H20 on
which they are supported 'and heated.
hydraulically, thus >eliminating entirely the
-electrical-systern and eliminating the lair operated
ried by the .supporting plate 102 which guides
the pins v8l as they slide .by gravity _down the in
clined plate 182. An adjustable _hold-down _bar
104 (see Figs. „8, 12 and 14) is provided Vto hold
the pins 8i on said plate 102. This bar _is not
shown in Figs. 11 and 13 of -`the drawings, in the
cylinders, though, if desired, one or- `more of the
interest of clearness.
the right-hand ,or outer _end thereof.
ing, opens its normally closed contacts and de
The axis of the horizontal motor or cylinder
venergizes relays C5 and C'i. Relay C1, on de
98 is through a vertical plane which bisects the
_energizingn yde-energizes solenoid YSii andthe main
groove 95 0f the die _94. >In alignment with the
four-way valve 65 returns-to its neutral position
heading tool 99 yand on the opposite side of the
to which it is Yspring-biased, thus by-passing 50 working portions of the _dies 8_8 and 9d, there is
pump :66. Relay C5, on ele-energizing, de_-ener
a bucking tool or head liil carried by the main
.gies solenoid S2 which causes cylinder 2d »to move
frame .83, which vcooperates to take the ,axial
the Adie block 23 and the lower or clamping d-ie
thrust from a pin Si _While the head is being
2'! to -their “out” position, or, in other Words, to
formed by the tool or die 9S.
their position adjacent the support and feed
To ,one side of the main frame 83 and carried
mechanism for _the pins 29, where >the-die 21 is in
on the supporting frame 88 there Ais _a _down
position to receive another pin 28. When said
wardly sloping pin supporting plate vl'ílZ which
V«die block 23 moves to this position, the ¿contacts
constitutes part of a pin feed-ing, supporting and
of yswitch LSB 'are closed. This `energizes relay
heating mechanism which in its general struc
C2 Vto start automatically ythe above described 60 ture `and function is similar `to the pin heating
cycle -all over again.
and feeding mechanism 4D above described. It
It"-is‘thus evident that once‘the unit is placed
diifers therefrom, however, in certain details
into operation it will continue automatically to
which are evident from the drawings and _from
head the pins 29, the only requirement being
the description to follow.
that »they be continuously fed to the ‘top of the 65
As best seen by reference to Fig. 11 of thedraw
pin heating and feeding mechanism A!! upon
ings, there is van _adjustable guideplate 1,83 car
_
Attention Yis -now directed to Figs. ‘7 through
V10 and 1-5, show-ing a modified form of heading
machine ¿in which all of the controls are affected
`.cylinders Amay be air operated.
_
_
l ,
_ `’,«I‘his _particular embodiment of the invention
’
The _left-hand ends Aof the pins, as viewed inV
_F-ig. ll, project vbeyond the .plate _|82 _and pass
9
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under the influence of the coils |05 of a high
frequency induction heating unit which may be
supplied with high frequency current from any
desired source, such as the “Tocco Jr.” unit.
Adjacent its forward end the plate |02 carries
10
the instant the pin drops on top of the die block
86, or of the die 89 which constitutes a continu
ation thereof, the bell crank ||1 will have been
sufûciently moved from its inactive position, as
illustrated in Fig. 12, to its active postion, as
a pivoted feed arm |06 which has an upwardly
illustrated in Fig. v14, so as to stretch a helical
spring |59 extending between the upper arm of
lowermost pin 9| and works between the lower
the crank | i1 and a pivoted lever |20 sufficient to
end of the supporting plate |02 and a stop bar
swing the lever |29 from its inactive position of
|08 which is carried by a bracket which forms 10 Fig. 12 to its active position of Fig. 14.
in effect an extension of the pin supporting plate
The lever |26 is rigidly attached to a pivot rod
|02.
.
52E pivotally mounted on the plate | I2 and carry
As clearly illustrated in Figs. 10 and l2 of the
ing a rigidly attached wing, butterfly or ñapper
drawings, when the die block 36 and die 89 are
|22. The flapper |22, when inactive, in effect
in their “in” or pin clamping position the head 15 constitutes a part oi the plate | I3. The plate | I3,
|01 will rest beneath the lowermost pin 9|.
however, has an opening through which the
When the die block 86 is removed to its “out” or
iiapper can swing on the pin |2| from the inac
pin receiving position, as illustrated in Figs. 8
tive position of Fig. 12 to the active position of
and 14 of the drawings, the cam surface |09
Fig. 14.
on the die block 86 cooperates with a roller llll 20
Thus when a pin 9| has been dropped onto the
carried by the feed arm |06 to swing said feed
die block 96 or the die 89, as above mentioned,
arm about its pivot, thus moving thc head |01
spring H9 will be tensioned suñìciently so as to
upwardly to push the pin over the stop bar |08
swing the ?lapper |22 down over the pin 9| and
and allow it to» roll into the pin groove 90 of
hold it down against the upper surface of said
the lower clamping die 89.
25 die block 86 or die 89. The flapper |22 is biased
It has been found in practice that for some
to its inactive position by a helical spring |23
pins, depending upon their size and/or material,
which surrounds the pivot rod |21, being attached
the pin is not always accurately received in the
to the hub of the lever |29 at one end, and to a
slot 90, with the mechanism as illustrated in Figs.
stationary journal box on the plate ||5 at the
extending head |01 which is positioned below the
8 and 10 of the drawings. To overcome this diffi 30 other end.
'
culty, a pin hold-down mechanism |||, as dis
The two springs | |9 and |23 cooperate so that
closed in Figs. 11 to 14 of the drawings, was de
a snap action in both directions is imparted to
vised which constitutes the invention of Kenneth
the ñapper | 22. That is, as bell crank ||1 is
T. Davis. This particular mechanism is disclosed
swung rearwardly, or to the left, as viewed in
and claimed in application Serial No. 86,265, filed 35 Figs. 12 and 14, spring | |9 will be expanded until
April 8, 1949, now Patent No. 2,554,564, dated
May 29, 1951. However, since it is a desirable ad
junct to the pin heading machine, under certain
circumstances, it will be described in detail here
it has adequate force to overcome spring |23.
Flapper |22 will then snap from its inactive po
sition of Fig. 12 to its active position of Fig. 14.
Any further rearward movement of the die block
1n.
40 86 will merely further expand spring IIS with
Pin hold-down mechanism ||| includes a gen
out significant effect.
erally horizontal body plate or frame | |2 to which
Fig. 14 shows the relation of the parts just
is connected an upwardly inclined integrally
prior to the die block 86 reaching its rearmost or
formed bracket and pin guide plate ||3 having
outer position and under these conditions the pin
a wing H4 provided with an elongated slot
9| thereon will be rolling over the surface of
45
adapted to be releasably connected to the stop
the die 89, being guided by the ñapper |22 and
bar |08 to support the plate |12, ||3 at one end.
by the plate H5 adjacent one end thereof. The
Adjacent the other end there is a generally ver
other end is guided by an adjustable guide block
tical guide plate ||5 which has an outwardly
|24 which is adjustably mounted on the horizon
tal plate ||2.
ñared top and which is rigidly attached to the
50
left-hand end of the plates ||2 and ||3, as
When the die block 86 reaches its rearmost
viewed in Fig. 1l of the drawings.
position a pin 9| will have been rolled into the
Guide plate ||5 acts as a guide and abutment
groove 99 and as the die block 86 moves for
plate for the left-hand or heated ends of the
wardly the parts will ultimately assume the posi
pins 9|, as viewed in Fig. l1, guiding said pins as
tions illustrated in Fig. 12, with a pin 9| car
they are ejected by the head |01 and rolled over 55 ried in the die 99, as illustrated in said Fig. 12.
the top of the stop bar |08. The guide plate I|5
There is also a hold-down spring tongue |25
is punched to receive a pivot stud H6 which has
carried by the plate H2 and extending forwardly
a double function of attaching the left-hand end
therefrom to hold the pin 9| in the groove 98
of the pin hold-down mechanism ||| to the stop
60 after said pin passes from under the plate | I2.
bar |08 and providing a pivot to support a bell
The operation of the heading machine, to
crank actuator ||1. The actuator ||'| has a
gether with its hydraulic control circuit, can best
downwardly extending curved arm which is
be understood by a description of one complete
adapted to be contacted by a pin Hi8 carried by
the die block 86, as the die block 86 moves toward
its outer or retracted position.
In Fig. 14 of the drawings the various parts
are illustrated, in which feed arm |06 has been
actuated by cam |09 to push a pin 9| over the
stop bar |08, which pin 9| was then guided by
the guide plate ||3 as it rolled over the curved
lowermost nose of the stop bar |08 and fell onto
a ?latsurface on the top of the die block 86 or
die 89.
cycle of operation thereof. Referring to Fig. 15
of the drawings, wherein the hydraulic circuit
is illustrated, it will be seen that there are two
hydraulic pumps, one pump being designated |2|a`
and constituting a constant delivery pump which
derives hydraulic fluid, such as oil, from a tank
|21. The other pump, designated |28, is a vari
able volurne pump. By adjusting the volumetric
output of the variable volume pump |28 the speed
of operation of the system may be controlled.
The output of pump |28 is delivered to a pres
,The parts are so timed that substantially at 75 sure pipe, line or conduit |29 through a high pres
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sure relief valve |30 which will spill to tank
inî‘re'spónse to excessive pressure. There vis also
a'reverfse'flow eheckva-lve |3'l' interposed between
relief'valve |39 and cönduit "|291 A pressure re
liefvalve |32 and a reverse -ñow check 'valve |33
are interposed between the variable delivery 'pump
la
groove 99 moves from Vunder it, whereupon 'the'
pin will roll over the upper surface of the v«fzljie 13'9
while being held in the groove 95a; th'e’die's 89
and 94 preferably separating only an amount
suñjcient to produce this action.
As a conse
quence, as the die block 85 moves to the right
>|28 and the pressure conduit |29.
from the position illustrated in Fig. 10, the re
i" "Beading from each of the high Vpressure relief
valves |39 and V|332 there is a branch conduit
moved pin 9| will roll ofi the left-hand end of
the upper surface of the die -block 95.
Should there be any tendency for the pin 9|
to stick in the upper groove 95, it will be ejected
which is connected to a manually operableunload
ing valve |34, there being a'reverse iiow check
by an ejecting cam |34 carried by an arm l|45
which is attached to a bracket |39 which in turn
is attached to the die block 33. The cam |44 will
ing valve
By operating the unloading valve
>|34 in onepositionï," -’relief valves |39 and |32 15 Contact the head of any pin 9| which tends to
stick in the groove 95 and eject it, causing the
become- effective b’y-p'a's'sf valves and by-pass
pin to fall on the bracket |43. which constitutes
the'ï'outpu't of- 'botlif the pumps |26 and |29
a downwardly sloping chute over which the
tò tank.v In the 'other position of the unload
headed pins can roll from the machine into any
in_g valve |34, pressure relief valves |39 and |32
valve |34" in eac-h of'these branch conduits. A
tank conduit orï'pipe' |35 leads from the unload
.
act asnorìnal pressure relief- valves. The un 20 desired receptacle.
Reverting to a consideration of the hydraulic
loading valve |34 can therefore be employed to
system of Fig. 15 and its operation, simultanee
stop the -complete operation of the heading ma
ously with the contraction of ejecting cylinder
chine at any >time and substantially instantane
|39, hydraulic fluid under pressure. is. also de
çùslyi.
,
,
.
,
.
,
.
VmUnder normal operating conditions hydraulic
fluid will be delivered/tothe pressure conduit
|29. Assuming that Va pin 9| has just been re
ceived'í? the groove V9!) of the lower clamping die
89 when it is in'itsV “out” or pin receiving posi
tion and the die block 86 is ready to be shuttled
forwar'dfor'to its “in” position. Under these con
25 livered through a sequence valve |41 to the head
end of free cylinder 81„ causing the die block 85
and the lower clamping die, 8.9 to, shuttle, to,` its
“in” or heading and clamping position. At the
end of its stroke, pressure will develop. in line |38
to` actuate sequence valve |41, whichV will bea
relatively low pressure, such asonehundred and
fifty pounds per square inch.
ditions the spoolsV ofïtwo four-way valves |36
Sequence valve |41, on operating, will deliver
af'nd |31v are in' their left-hand positions, as
the hydraulic fluid under -pressure to line, pipe
viewed ‘in Fig. 15.` " '
~
'
'
» Pressure Vfrom the pressure conduit |35 is there 35 or conduit |43 which ñows through sequence
valve |49 to the head end or top of clamp, cyl
fore delivered to the two right-hand cylinder
inder 91, forcing the die block 93„and the upper
ports of- these valves |35 and I3?. Valve |39
clamping die 94 downwardi to clamp a pin 9|
is actually r'a control valve which controls the
between the> two dies 89 and 94,
,
position ofvalve |31. Hydraulic ñuid under pres
sure' will therefore How from valve |31 to line, 40 When pressure in the line |48 reaches a pre
determined. velue, Such @sone hundred» and; flity
pipe or conduit |38, to the top of a pin ejecting
pounds per Square inch,V sequence valve |49 will
cylinder |39. The pin ejecting cylinder |39 is
l part of 'a pin ejecting mechanism which is best
disclosed in Fig. 9 ofthe drawings. It consti
tutes a small cylinder which is fixed to the guide
block r85 and has an actuating piston rod |49I
which is in` alignment with the groove 95 of the
upper die 94.
`
'
'
ï
’
The die block 83 carries a spring-pressed
plunger |4l which is adapted to align itself with
the piston rod |49 when the lower pin clamping
die 89 is in its “in” position, or, in other words,
the pin groove 99 is in alignment with the pin
groove 95, as illustrated in Fig. 10 of the'draw
ings.
APlunger |4| preferably carries a cross-head
|42 which cooperates with one or more pins |43
which project through the bottom of the groove
9U in the die 89. As illustrated in Fig. 9 of the
drawings, the die 89 has a removable insert por
tion over part of its length which may or may not
be employed. In seme instances it has been
found desirable to make this insert portion of
very high tensile steel and to make it separate.
In other cases, this has not been found necessary.
Opera, delivering the hydraulic fluid` t9 _line-,pine
0r, Qorlslult. |58. and bv it [email protected] thev head and, Qf. the
heading cylinder 9_8 throughl sequence valve |5|¿.
Heading ¿vlinder 9.6, upon. Operating will. forse,
the die 99 against the heated end off, the pin 9|
which, is clamped bett/[email protected] clamping dies 89.
and 94 and forma headron it.
‘ When theA pressure in the line |59 builds up
- to a relatively high value, such as fifteen hun
dred pounds per square inch, the sequencevalve
|5| will divert the hydraulic ñuid to line, pipe or
conduit |52 whichfis connectedy withvconduit |59
through a reverse ñow check valve |53,
The high pressure fluid in the line |52 is de-l
livered to the left-hand endrof valve |35. which
reverses the spool thereof, thusv delivering fluid
from the pressure line |35 to the left-hand, end
of the valve or spool |33, alsoreversing it. Fluid
pressure is then delivered from conduit |35 by
valve |3ï to line, pipe orconduit |54 which op-erates the pin ejecting cylinder |39 to push the
headed pin 9| upwardly, or, in otherY words,
maintainit in the upperV groove 95' of die 94, as
said die 94 moves upward, as hereinafter de
In any event, the pins |43, or at least one of
scribed.
them, when moved upwardly, will contact any
The iiuid in conduit or pipe |54 ilows through
pin 9| in the groove 99 and push it upwardly,
sequence valve |55 to the piston rod end ofthe
preferably with the upward movement ofthe
cylinder 98 to retract it. When pressure builds
upper clamping die 94, holding it in the groove 70 up in this line |99 to a predetermined value,
95 thereof until the pin 9| is rolled over the
whichmay be relatively low, such as one hun
upper surface of the die 89, as said die 99 moves
dred and ñfty pounds per square inch,` oil-is de
to its "out” or right-hand position, as viewer
livered through pipe, line or conduit |56, to the
in Figs. Sand 10. The effect of this, of coursejis
piston rod end ofthe shuttle or feed cylinderfßï;
to hold .the pin in the upper groove 95 until-'the 75 through sequencevalve |51». causing the cylinder
13
14
81 to move outwardly or to the right, thus
shuttling the guide block 86 and/ or clamping die
89 to the pin receiving position.
operated means to elevate said upper pin clamp'
' When the valve |31 was actuated to the right,
pin clamping means to its pin receiving position,
ing means and second to operate the second
named power operated means to move said lower
as above described, the constant fluid pressure>
and mechanism operable in response to said sec
in the line |29, which is delivered to the piston
rod end of the cylinder 91, immediately moved`
it upward `together with the die block 93 and die
ond operation to eject the headed pin from the
slot of said lower pin clamping means.
2. A pin heading machine including means
94, since the line or conduit |48 is now con
supporting a row of pins, means for heating one
nected to drain through the sequence valve |41
end of each pin by electrical induction, relative
ly movable upper and lower pin clamping means
which provides a free reverse iiow between con
having alignable pin receiving grooves cooperat
duit |48 and conduit |38; conduit |38 under these>
circumstances being connected by four-way valve
|31 to drain line |35.
When the sequence valve |527 is actuated, upon
the cylinder 81 reaching its outermost position
of travel, the hydraulic fluid is delivered to con-l
duit, pipe or line |58 to reverse the
|36, moving it to the left, which
ment of the four-way valve §31 to
ing to clamp a pin, power operated means for
reciprocating said upper pin clamping means up
wardly and downwardly, power operated means
for reciprocating said lower pin clamping means
between two extreme positions in one of which
the pin receiving grooves of said upper and lower
spool of valve
pin clamping means are in alignment and in the
effects move
the left, thus 20 other of which the lower pin clamping means is
in a-position to receive a pin from said pin sup
porting means, power operated means for feeding
described se
starting a new cycle of operation,
Associated with the previously
quence valve |5| is a needle valve 55€ which
.vents valve 55| so that it will operate at a low
pressure rather than a high pressure. This is
one pin at a time from said pin supporting means
to said lower pin clamping means while it is
in said pin receiving position, means for actuating
the second named power operated means to move
desirable whenever a pin 9| is clamped in the
two dies 89 and 94, which has not been heated,
thus allowing the pin to be discharged without
applying a heading pressure to the tool @9
through cylinder Q8. This operation is generally
required when the unit is ñrst placed in opera
tion, since there will be a number of pins which
have not been heated or adequately heated to
it and a received pin from its pin receiving posi
tion to its position where the pin receiving groove
thereof is in alignment with the pin receiving
groove of the upper pin clamping means while
said upper clamping means is elevated, means op
erable then to actuate the first named power
operated means to lower said upper pin clamp
ing means into pin clamping position, heading die
Obviously those skilled in the art may make 35 means operable rectilinearly along the axis of
said pin to form a head on said pin, and actuating
various changes in the details and arrangement
means operable thereafter in sequence ñrst to
of parts without departing from the spirit and
effect the heading operation.
operate the first named power operated means
to elevate said upper pin clamping means and
not to be restricted to the precise construction 40 second to operate the second named power oper
ated means to move said lower pin clamping
herein disclosed.
means to its pin receiving position.
Having- thus described and shown an embodi
3. A pin heading machine including means sup
ment of the invention, what it is desired to se
porting a row of pins, means for heating one end
cure by Letters Patent of the United States is:
of each pin, relatively movable upper and lower
1. A pin heading machine including means
scope of the invention as deñned by the claims
hereto appended, and applicant therefore wishes
supporting a row of pins, means for heating one
pin clamping means having alignable pin receiv
end of each pin by electrical induction, relatively
ing grooves cooperating to clamp a pin, power
operated means for reciprocating said upper pin
clamping means upwardly and downwardly, pow
movable upper and lower pin clamping means
having alignable pin receiving grooves cooperat
ing to clamp a pin, power operated means for 50 er operated means for reciprocating said lower
pin clamping means between two eXtreme posi
reciprocating said upper pin clamping means up
tions in one of which the pin receiving grooves
wardly and downwardly, power operated means
of said upper and lower pin clamping means are
for reciprocating said lower pin clamping means
in alignment and in the other of which the
between two eXtreme positions in one of which
lower pin clamping means is in a position to
the pin receiving- grooves of said upper and lower
receive a pin from said pin supporting means,
pin clamping means are in alignment and in the
power operated means for feeding one pin at
other Aof which the lower pin clamping means is
a time from said pin supporting means to said
in a position to receive a pin from said pin sup
lower pin clamping means while it is in said
porting means, power operated means for feed
pin receiving position, means for actuating the
ing one pin at a time from said pin supporting
second named power operated means to move it
means to said lower pin clamping means while
and a received pin from its pin receiving posi
it is in said pin receiving position, meansfor
tion to its position where the pin receiving groove
actuating the second named power operated
thereof is in alignment with the pin receiving
means to move it and a received pin from its
groove of the upper pin clamping means while
pin receiving position to its position where the
pin receiving groove thereof is in alignment with
said upper clamping means is elevated, means op
the pin receiving groove of the upper pin clamp
erable then to actuate the ñrst named power op
erated means to lower said upper pin clamping
ing means While said upper clamping means is
means into pin clamping position, heading die
elevated, means operable then to actuate the
first named power operated means to lower said 70 means operable rectilinearly along the axis of
upper in clamping means into pin clamping po
said pin, actuating means operable thereafter in
sition, heading die means operable rectilinearly
sequence ñrst to operate the ñrst named power
operated means to elevate said upper pin clamp
along the axis of said pin to form a head on said
pin, actuating means operable thereafter in se
ing means and second to operate the second
quence first to operate the ñrst named power 75 named power operated means to move said lower
y
l
:2,575,504
17
18
its4 pin receiving position, and mechanism oper
receiving groove thereof is in alignment with the
pin receiving groove of the upper pin clamp
` able in response to said second operation to eject
ing means while said upper clamping means is
the headed pin from the slot of said lower pin
clamping means.
8. A pin heading machine including means
supporting a row of pins, relatively movable
upper and lower pin clamping means having
elevated, means operable then to actuate the
first named power operated means to lower said
along the aXis of said pin to form a head on said
alignablepin receiving grooves cooperating to
pin, actuating means operable thereafter in
clamp a pin, power operated means for recipro
sequence ñrst to operate the first named power
operated means to elevate said upper pin clamp
ing means and second to operate the second
’ means to move said lower pin clamping means to
cating said upper pin clamping means upwardly
and downwardly, power operated means for re
ciprocating said lower pin clamping means
between two extreme positions in one of which
the pin receiving grooves of said upper and lower
` pin clamping means are in alignment and in the
yother of which the lower pin clamping means is
in a position to receive a pin from said pin sup
porting means, power operated means for feeding
one pin at a time from said pin supporting means
to said lower pin clamping means while it is in
lsaid pin receiving position, means for actuating
the second named power operated means to move
it and a received pin from its pin receiving posi
tion to its position where the pin receiving groove
thereof is in alignment with the pin receiving
groove of the upper pin clamping means while
said upper clamping means is elevated, means
upper pin clamping means into pin clamping
position, heading die means operable rectilinearly
named power operated means to move said lower
pin clamping means to its pin receiving position,
and means for removing said pin from said lower
clamping means after said first-named power
operated means is elevated, including an ejector.
1l. A pin heading machine including means
supporting a row of pins, means for heating one
end of each pin, relatively movable upper and
lower` pin clamping means having alignable pin
receiving grooves cooperating to clamp a pin,
power operated means for reciprocating said up
per pin clamping means upwardly and down
wardly, power operated means for reciprocating
said lower pin clamping means between two eX
treme positions in one of which the pin receiv
ing grooves of said upper and lower pin clamping
means are in alignment and in the other of
operable then to actuate the iirst named power
operated means to lower said upper pin clamping 30 which the lower pin clamping means is in a po
sition to receive a pin from said pin supporting
-means into pin clamping position, heading die
means, power operated means for feeding one pin
means operable rectilinearly along the axis of
at a time from said pin supporting means to
said pin to form a head on said pin, and actuat
s_aid lower pin clamping means while it is in said
ing means operable thereafter in sequence ñrst
pin receiving position, means for actuating the
to operate the’ñrst named power operated means
second named power operated means to move it
to elevate said upper pin clamping means and
and a received pin from its pin receiving posi
second to operate the second named power oper
tion to its position where the pin receiving groove
ated means to move said lower pin clamping
thereof is in alignment with the pin receiving
means to its pin receiving position.
9. A pin heading machine including a frame, 40 groove of the upper pin clamping means while
said upper clamping means is elevated, means
a top clamping cylinder on the top of said frame
operable then to actuate the first named power
and extending downwardly into said opening, a
operated means to lower said upper pin clamp
vertically reciprocal clamping member on the
ing means into pin clamping position, heading
bottom of said top clamping cylinder, a horizon
die means operable rectilinearly along the axis
tally reciprocable clamping member adjustable
of said pin to form a head on said pin, actuating
into clamping aligned position with said ñrst
means operable thereafter in sequence first to
named clamping member and. adjustable into a
operate the first named power operated means to
pin receiving position out of alignment with said
ñrst clamping member, and a heading die mem
ber in alignment with said first clamping mem
ber reciprocable at right angles to the direction
of reciprocation of said horizontally reciprocable
clamping member adapted to head a pin held
between said clamping dies.
10. A pin heading machine including means
elevate said upper pin clamping means and sec
50 ond to operate the second named power operated
means to move said lower pin clamping means
supporting a row of pins, means for heating one
to its pin receiving position, and means for re_
moving said pin from said lower clamping means
after said first-named power operated means is
elevated, including an ejector.
12. A pin heading machine including means
end of each pin by electrical induction, relatively
supporting a row of pins, means for heating one
end of each pin, relatively movable upper and
lower pin clamping means having alignable pin
ing to clamp a pin, power operated means for 60 receiving grooves cooperating to clamp a pin,
movable upper and lower pin clamping means
having alignable pin receiving grooves cooperat
power operated means for reciprocating said up
reciprocating said upper pin clamping means up
per pin clamping means upwardly and down
wardly and downwardly, power operated means
wardly, power operated means for reciprocating
for reciprocating said lower pin clamping means
said lower pin clamping means between two ex
between two extreme positions in one of which
treme positions in one of which the pin receiving
the pin receiving grooves of said upper and lower
grooves of said upper and lower pin clamping
pin clamping means are in alignment and in the
means are in alignment and in the other of
other of which the lower pin clamping means is
in a position to receive a pin from said pin sup
which the lower pin clamping means is in a posi
porting means, power operated means for feed
tion to receive a pin from said pin supporting
ing one pin at a time from said pin supporting 70 means, power operated means for feeding one pin
means to said lower pin clamping means while
at a time from said pin supporting means to
it is in said pin receiving position, means for
said lower pin clamping means while it is in said
actuating the second named power operated
pin receiving position, means for actuating the
means to move it and a received pin from its pin
second named power operated means to move it
e receiving position to its position where the pin
and a received pin :from its pin receiving positief;
2,575,504
20
1,9
Ato its vposition where Vthe pin ,receivingy groove
`thereof is in alignment with the pin receiving
«grooveof the upper pin clamping means while
said upper clamping means is elevated, ‘means
operable then to actuate the ñrst named power
Voperated means to lower said upper pin clamping
Vmeans into pin clamping position, heading die
means operable rectilinearly along the axis of
_said pin to form a head on said pin, actuating
>means operable thereafter in sequence ñrst to_ l0
operate the ñrst named power operated means
to Velevate said upper pin clamping means and
zsecondv to operate the second named power oper
ing one pin at a time from said pin supporting
means to said lower pin clamping means while
it is in said pin receiving position, means for
actuating the second named power operated
means to move it and a received pin from its pin
receiving position to its position where the pin
receiving groove thereof is in alignment with the
pin receiving groove of the upper pin clamping
means while said upper clamping means is ele
vated, means operable then to actuate the first
named power operated means to lower saidv up
per pin clamping means into pin clamping posi
tion, heading -die means operable rectilinearly
ated means to move said lower pin clamping
along the axis of said'pin to form a head on said
'means to its pin Vreceiving position,`mechanism
operable while said 'lower pin clamping means
Aisinv the aligned groove position to push a pin
upwardly with the upward elevating movement
of said upper pin clamping means, and ejector
pin, actuating meansV operable thereafter’in'se
quence ñrst to operate the iîrst named power
operated means to elevate-saidv upper pin clamp
means to strip a pin from the upper pin' clamp
ing means.
ing means and 'second to operate the second
named power operated means to move said ‘lower
20 -pin clamping means to its pin receiving position,
and means for removing said pin from said lower
13. A pin heading machine íncluding'means
- clamping means after said first-named power op
supporting a row of pins, relatively movable'up
erated-means is elevated, including an ejector.
per and lower pin clamping means having align
'
'
>FRED J. WRIGHT. '
able pin receiving grooves cooperating to- clamp 25
, REFERENCES CITED
a pin, power operated means for vreciprocating
said upper pin clamping means upwardly and
'The following references are of record'in the
downwardly, power operated means for recipro
ñle of this patent:
Veating said lower piny clamping means between
UNITED STATES PATENTS
two extreme positions in one of which «the pin're 30
Number
Name
l
.
Date
ceiving groovesV of said upper and lower pin
clamping means are in alignment and in the
other of which the lower pin clamping mea-ns is
in a position> to receive a pin from -saidpin-sup
Vportingv means, power operated means‘for feed 35
v59,464
1,766,484
1,835,598
2,288,643
Seward ___________ __ Nov. 6,
yClouse __________ __ June 24,
Hogberg __________ __ Dec. 8,
Purtell ____________ __ July 7,
1866
1930
1931
1942
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