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Патент USA US2383927

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Aug. 28, 1945.
c. A. CARLSON
-
2,383,927
WIRE‘GRIND'ING MACHINE
Filed July 15, 1944
3 Sheets-Sheet l
257
///
///
/
56
l'
31 won'to-v
CARL A. CARLsoN
“Mum
Aug- 218, 1945'
I
c. A. CARLSON
2,383,927
WIRE GRINDING MACHINE
Filed July 15, 1944
3 Sheets-Sheet 2
CARL A. CARLsoN
Aug, 28, .1945.
} c. A. CARLSQN
WIRE GRINDING MACHINE
Filed July 15', 1944 _
Hg. 6
26
2,383,927
3 Sheets-Sheet 3
kg
CARL A. CARLsoN
“Mum
2,383,927
Patented Aug. 28, 1945
- 2,383,927
wmr: GRINDING
t
,
Carl A. Carlson, Worcester, Mass., assignor to
Norton Company, Worcester, Mass, a corpora
tion of Massachusetts
Application July 15, 1944, Serial No. 545,121
11 Claims. (El. 51-90)
This invention relates to grinding machines,
an enlarged scale, showing the relationship of
and more particularly to a machine for grinding _
the grinding wheels and the work steadying
wire or other similar work pieces.
One object of the invention is to provide a
guide; and
'
,Fig. 91s a fragmentary ‘detail view, showing the -
simple and thoroughly practical grinding ma
chine for grinding continuous work pieces such
‘as wire and the like. A further object of the
support for the work steadying guide.
A wire grinding machine has been shown in
the drawings having a base Ill which supports a
invention is to provide a wire grinding machine
pair of upwardly extending brackets H and it
having opposed rotatable grinding wheels which
which serve as rotatable support for a pair of
are revolved while the work piece to be ground
spaced rotatable trunnions i8 and It. The trun
is fed therebetween.
A further object of the invention is to provide
nions l3 and it are formed integral with a re
volvable wheel supporting drum 95 which is
a wire grinding machine having a rotatable
frame which supports a pair of opposed grind
ing wheels, in which the rotatable support and
the grinding wheels are independently driven.
A further object of the invention is to provide a
preferably formed by providing spaced plates
i6, H and it which are interconnected by longi
tudinally extending members I9, 20, 2!, 22, 2t
and 2d.
The end plates I8 and 68 are either
formed integral with or ?xedly mounted rela
wire grinding machine having a pair of opposed
revolvable grinding wheels which are adjustably
tive to the trunnions l3 and It, respectively.
'
A wire supporting reel 25 is rotatably supported-
supported and provided with feeding mecha
to carry a coil oi‘ wire 26 to be ground which is
nisms whereby the grinding wheels may be 20 fed through a central. aperture 21 in the trun
fed toward and from the axis of revolution dur
nion i3 and passes through the center of the
ing a grinding operation. Other objects will be
rotatable wheel support l5 and through a central
in part obvious or in part pointed out hereinafter.
aperture 28 formed withinthe trunnion id. The
The invention accordingly consists in the fea
ground wire is reeled up on a motor driven reel
tures of construction, combinations of elements,
29 which is supported adjacent to the right-hand
and arrangements or parts, as will be exempli?ed
end of the machine. The motor for driving the
in the structure to be hereinafter described, and
reel 29 is preferably a variable speed motor which
the scope of the application of which will be
indicated in the following claims.
In the, accompanying drawings in which is
- may be manually controlled so as to vary the
30 rate of feed of the wire 26 through the machine.
illustrated one of many possible embodiments of
the mechanical features of this invention,
A driving mechanism is provided for rotat
ing the wheel supporting drum l5 comprising a
variable speed electric motor-3t] which is provided
Fig. 1 is a cross sectional view, taken approxi
with a. multi-v-groove pulley 8|, The pulley 3i '
mately on the line l-i of Fig. 4, showing the
35 is connected by multiple V-belts 32 with a large
arrangement of the grinding wheels and the
diameter ,multi-V-groove. pulley 33 which is
rotatable support ‘therefor; '
mounted on the leftehand end of the trunnion l3.
Fig. 2 is a fragmentary elevation, on an en
By varying the speed or the motor 30, the rotat
larged scale, of one of the-grinding wheel units;
able wheel supporting drum may be rotated at »
Fig. 3 is a fragmentary sectional view, on an
the desired speed for the grinding operation.
enlarged scale, of the feeding mechanism for 40 The rotatable drum l5 serves as a support-for
the grinding wheel unit shown in Fig. 2; 1
Fig. 4 is a longitudinal sectional view, taken
approximately on the line ?~4 of Fig. 1;
Fig. 5 is a fragmentary horizontal sectional 45
view, on an enlarged scale, taken approximately
on the line 5—5 of Fig. '7, showing the plunger
mechanism for actuating the wheel feed;
Fig. 6 is a diagrammatic plan view of the ma
chine,_ showing the wire reeling and supporting
mechanism together with the drive for the revolv
able wheel unit;
Fig. 7 is a fragmentary front elevation of the
improved wire grinding machine;
'
I
_
Fig. 8 is a fragmentary diagrammatic view, on
a pair of - opposed grinding wheels 35 and 36
which are arranged to engage thewire 26 to be
ground on diametrically opposite sides. Each of
the grinding wheels 35 and 36 is preferably inde
pendently rotated by independent variable speed
motors so that the speed of- rotation of the wheels _
may be adjusted to produce .the- desired grinding
action. Each of the grinding wheels is preferably
‘supported on a. movable member so that the wheel
may be adjusted toward "and from the wire to
be ground so as to compensate for wheel wear
and also't'o produce the desired feeding action.
In the preferred construction, the grinding wheel
36 is supported on a pivotally mounted frame in v '
.2
2,383,927
_
er 15 will impart a partialrotation to the star
which is supported by a pair of spaced opposed
40 is
wheel ‘II and thus transmit a feeding movement
:djustably supported on the wheel support ?an:
to adjust the ‘grinding wheel 36 either toward
ivot screws 38- and 39. An electric motor
through the mechanism above described so as I
is connected by a multiple v-belt 4i wi dle
pllley 42 on the left-hand end of a wheel n A
or from the axis of the drum [5.
Similarly, if
the plunger 16 is moved into an operative posi
43 which supports the grinding wheel_
b
manually adjustable screw 44 is provide d I};
tion 16a, as shown in dotted lines in Fig. 5. the
‘ revolving star wheel ‘ll engaging the plunger ‘l6
means of which the motor 40 may be adjuste ‘on
will impart a rotary motion to the star wheel
the wheel support 31 so as to properly tensio 10 ‘H in the opposite direction which will transmit
driving belts 4|.
'
a feeding movement to the grinding wheel 30,
mi similar wheel support 45 is provided for the
also in the opposite direction. ‘A pair of actu
rinding wheel 35. The wheel support 45. is
ating knobs ‘l1 and 18 are provided for actuat
ing the plungers ‘l5 and 16, respectively.
.
pivot screws 45 and 41. An electric ‘motorrt 45 15 It is desirable that only one of the plungers
adjustably mounted on the wheel suppo “I a
be moved into an operating position while the
and is connected by a multiple V-belt 49 W1 d
other plunger is maintained in an inoperative
givotally supported by a pair Of spaced 0139:8861:
pulley 50 which is supported on the leflt-han
end of a wheel spindle 5| which rotatab y sus
ports the grinding wheel 35. A manually ah
justable screw 52v is provided for adiustingt te
position. This is preferably accomplished by
providing an inter-connection between the two
20 plungers.
motor 38 relative to the support 45 to facili a e
tensioning the driving belts 49 as desired.
rock arm BI is pivotally supported by a stud 82
The rock arm 8i is con
nected by studs 83 and 84' with the plungers ‘l5
on the bracket ‘I8.
Each of the wheel supports 31 and 45 is pro
'
' vided with a
feeding mechanism whereby the
and 35 respectively may be
grinding wheels 3!
toward and from the axis of
A bracket 19 is fixedly mounted on
a casing 80 which surrounds the machine. A
25
and 16, respectively. It will be readily apparent
from the foregoing disclosure that when~ the
plunger or stud ‘I5 is moved into an operative
These mechanisms Y
i5.
rotation of the drum
identical, consequently only
are substantially
d m data“ A feed screw ,
position by manual actuation of the knob 11,
the'plunger .16 will be moved, in’ the opposite
one will be describe
.
to a Snde 30 direction__and maintained in an inoperative po
'55 is pivotally connected by a stud‘ 56
sition. Similarly, when the plunger 16 is moved
lock 51 which is slidably supported on the _wheel
into an operative position, the plunger 15 will
tsupport 3'1. The feed screw 55‘ meshes with or
be maintained in an inoperative position.
engages a nut 58 which is rotatably supported in.
‘Balanced compression springs ‘are associated
a portion 55 formed integral with or ?xedly 35 with each of the plungers ‘l5 and ‘I6 normally
mounted relative to the drum IS. The nut 58
to maintain them in an inoperative position.
‘is provided with an outwardly'extending integral"
A pair of similar plungers 85 and 86 are pro
gear Bl formed on its pg;
vided on the opposite side of the casing 80 which
are arranged to be moved ‘into the path of op
posite sides of the star wheel 13 as it revolves
40
stud 163 also supports a gear 64 which is keyed
with the drum IS. The plungers 85 and.“ are
meshes
with
a
gear
65'
thereto. The gear 64
interconnected by means of a rock arm 81 so
' ?ange 80 which has a
ri h
meshing with a gear 62. The gear
m supported on a rotatable stud 6'3. The
-isp?xedly
which is formed integral with a rotatable sleeve _
B havin a central clearance aperture 61 with
ion whichg the feed screw 55 may telescope. A
gear 68 is mounted at the lower end of the sleeve
66 and meshes with a gear 99 which is sup-1
ported on a rotatable shaft 10. A star whee
‘H is ?xedly mounted on the outer end of the
shaft ‘I0. It will be readily apparent that ro
tary motion of the star wheel 1i W111 be trans
mitted through the gear 69, the gear 68, the
sleeve“, the gear 65, the gear 64, the gear 62.
and'the gear 6!, to rotate the nut 58 relative to
the non-rotatable screw 55 so as tocause the
ers 85 and 86 on the opposite side of the casing,
the grinding wheel 35 may be adjusted either
screw 55 to move in an axial direction so as to 55
feed the grinding wheel 36 either toward or from _
the axis of the rotatable support It.
that only one of the plungers 85 or B6 may be
moved into an operative position while the
other plunger is maintained inoperative. Actu
45 ating knobs 88 and 89 are provided for actuating
the plungers 85 and 86, respectively. It will be
readily apparent from the foregoing disclosure
that by actuating the plungers 15b!‘ 16 on one
side of the frame 80, the grinding wheel 36 may
be fed either toward or_ from‘ the wire to be
ground and similarly by actuation of the plung
toward or from the axis of the wire to be ground‘
during rotation of the drum 1!.
The wire 26, after it leaves the reel 25, passes
through a pair of opposed guiding ‘surfaces 80
Only one pairof opposed grinding wheels has _ v and 91 which are preferably adiustable.rela
'
'
ll he
been illustrated .in the drawings but it wi _
,tively toward and from each other so that the
readily apparent that, if desired, a plurality i31f
pairs of opposed grinding wheels may be read y
provided by- lengthening the machine so as to
provide sufficient support‘for the same on the
rotatable drum l5.
.
-
In order to provide a ‘controlled feeding move
ment of the grinding wheel 85 during rotation
of the drum I‘, a pair of spring-pressed plung
ers ‘I5 and 16 are provided which are arranged
to be thrown into the path of the star wheel ‘II.
When it is desired ‘to-initiate a feeding move
ment ofthe
‘ ding wheel 36, the plunger ‘Ii
is moved towagignthe right (Fig. 5) into an oper
ative position in the path of the star wheel ‘ll.
When the‘ drum i5 is rotated, the star wheel 1!
moves past the plunger ‘IS, the stationary plung
wire passing through the 'drum I5 may be main
tained under proper tension. As the wire 28
’
passes from the other end of ‘the machine, it
passes‘under a dial indicator 92 which visibly
indicates the size of the finish ground wire. By
65
observing the dial indicator, the operator may
readily observe whether or not the wire-is being
ground to size and make suitable feeding ad
justments of the wheels to compensate for any
70 deviations in wire size. . '
In order to drive the grinding wheels 85 and 38
independently, a plurality of slip rings 84 are
provided adjacent to the right-hand ‘end of the
trunnion H. A main starter switch 85 is pro
vided for opening and closing ,the circuit to.
2,888,927
supply power through independent switches 96
,
frame, a pair of spaced journal hearings on said
base rotatably’ to support said trunnions and
frame, a central aperture through said trunnions
and frame for guiding wire to be ground there
through, means to rotate said frame, a rotatable
grinding wheel on said frame, an adjustable sup
port on said frame for said wheel, an electric
and 91 which are connected through slip rings
. 94 to control the electric current passing to the
motors 40 and 48, respectively.
.
It is desirable to steady the wire being ground
between the grinding wheels 35 and 36 by means
' of a work steadying guide bar I00 which is ?x
ediy supported on a bar “I I. The bar I0! is keyed ’ motor on said support for rotating said grinding
to the plates I6 and I7, as indicated in Fig. 9.
wheel, a work steadying guide on said frame, a
The grinding wheels 35 and 35 are preferably 10 nut and screw mechanism for adjusting said sup
rotated in opposite directions, that is, so that
port relative to said frame to feed the grinding
at the point of grinding contact with the wire
wheel either toward or from the wire to be ground,
being ground, the thrust of the grinding wheels
and means including a star wheel mechanism to
will be in a direction so as to hold the wire against
facilitate automatically adjusting the position of
the work supporting guide I00 so that the wire 15 said grinding wheel while said frame is rotating.
will be rigidly supported as it is ground away.
3. In a wire grinding machine having a base,
The operation of the improved wire grinding
a rotatable frame, a trunnion at each end of said
machine will be readily apparent from the fore->
going disclosure. A reel of-wire 26 to be ground
is supported on the rotatable reel 25. The wire
2b is passed through the tension guides 90 and
9| and is threaded through the central apertures
.in the trunnions I3 and M, respectively, through
a guiding surface 93 which is located below the
frame, a pair of spaced journal hearings on said ,
20
base rotatably to support said trunnion and
frame, a central aperture through said-trunnions
and frame for guiding wire to be ground there
through, means to rotate said frame, a pair of
opposed rotatable grinding wheels supported
within said frame, an adjustable. support on said
dial gauge 92, and onto the motor driven wind-up 25 frame for each of said wheels, an independent
reel 28. The motor 30 may then be started to
driving motor on each of said supports for in
rotate the drum l5, and the motors M) and d8
dependently rotating each of said wheels in opw
started to rotate the grinding wheels 36 and 35,
site directions, a work steadying guide between
respectively. The wheels 85 and 35 may then
said wheels to steady the wire during grinding,
be fed toward the periphery of the wire to be 30 -_and an independent nut and screw mechanism
ground to the desired extent, after which the
for‘radjusting each of said suppbrts relative to
motor driven reel 29 may be started to draw the
said frame to feed said wheels either toward or
wire 26 through the machine while the grinding
from the wire to be ground.
'
wheels 36 and 35 rotate and revolve about its
4. In a wire grinding machine having a base,
peripheral surface to grind the same to the de 35 a rotatable frame, a trunnion at each end of
sired and predetermined extent. As above de
said frame, a pair of spaced journal bearings on
scribed, either of the wheels 36 or 35 may be ad
said base rotatably to support said trunnions and
_ justed by manipulation of the independent feed
frame, a central aperture through said trunnions
ing mechanisms. The speed of revolution of the
and frame for guiding wire to be ground
drum i5, the speed of rotation of the grinding 40 therethrough, means to rotate said frame, a pair
wheels 35 and 35, and the speed of rotation of the
of opposed rotatable grinding wheels supported
wind-up reel 29 may be independently adjusted
within said frame, a pivotally mounted support
as desired so as to produce the desired and pre
on said frame for each of said grinding wheels,
determined grinding action upon the surface of
an independent driving motor on each of said
the‘wire 2b to be ground.
,
supports for independently rotating each of said
It will thus be seen that there has been pro
wheels in opposite directions, a work steadying
vided by this invention apparatus in which the
guide on said frame which projects between said'
various objects hereinabove set forth together
wheels to steady the wire being ground, and an
with many thoroughly practical advantages are
independent nut and screw mechanism for inde
successfully achieved. As many possible embodi-~ 50 pendently swinging said supports relative to said _
ments maybe made of the above invention and
frame to feed said grinding wheels either toward
or from the wire to be ground.
as many changes might‘ be made inv the em
5. In a wire grinding machine having a base,
bodiment above set forth, it is to be understood
that all matter hereinbefore set forth or shown
. a rotatable frame, a trunnion at each end of
in the accompanying drawings is to be interpreted 55 said frame, a pair of spaced journal bearings on
as illustrative and not in a limiting'sense.
said base rotatably to support said trunnions and
‘frame, a central aperture through said. trun»
nions and frame for guiding wire to be ground
1. In a wire grinding machine having a base,
therethrough, means to rotate said frame, a pair
a rotatable frame, a trunnion at each end of said'
frame, a pair of spaced journal bearings on said 60 of opposed rotatable grinding wheels supported.
within said frame, a pivotally mounted support
base rotatably to support said trunnions and
on said frame for each of said grinding wheels,
frame, a central aperture through said trunnions
an independent driving motor on each of said
and frame for guiding wire to be ground there
supports for independently rotating each of said
through, means to rotate said frame, a pair of
wheels, an independent nut and screw mecha~
opposed rotatable grinding wheels within said
nism for independently swinging said‘supports
frame, an adjustable support on said frame for
relative to said frame to feed said grinding wheels
each of said wheels. an independent electric motor
either toward or from the wire to be ground, and
on each of said supports for rotating each of said
means including a star wheel mechanism auto
grinding wheels, and independent means for inde
to adjust said screws during rotation ‘
pendently adjusting each of said supports relative 70 matically
of said frame.
to said frame to feed the grinding wheels either
6. In a wire grinding machine having a base,
toward or from the wire to be ground.
I claim:
"
‘
'
2. In a wire grinding machine having a base,
I a rotatable frame, a trunnion at each end of said
frame, a'pair of spaced journal lbearings onsaid
a rotatable frame, a trunnion at each end of said 75 base rotatably to support said trunnions and
4
2,383,927
‘ frame, a central aperture through said trunnions
and frame for guiding wire to be ground there
through, means to rotate said frame, a pair of
opposed rotatable grinding wheels supported
within said frame, a pivotally mounted support
on said frame for each of said grinding wheels,
said pivot for the supports being adjacent to the‘ ‘
periphery of said'frame, an independent driving
motor on each of said supports for independ~
ently rotating each of said wheels, and means 10
including a nut and screw mechanism for swing
ing each of said supports about its pivot to feed
said grinding wheels either toward or from the
mounted support on said frame for each of said '
wheels, said pivotal supports~ being arranged so
that the grinding wheel axes swing along a path
substantially diametrically of said frame, an in
dependent motor on each of said supports for
independently rotating said wheels, an independ
ent nut and screw mechanism for adjusting each
of said, supports relative to said frame to feed
said grinding wheels either toward or from the
wire to be ground, a star wheel operatively con
nected to rotate each of said feed screws, a pair
of normally inoperative plungers which are ar
ranged to be moved into the path of said star
wire to be ground.
wheels at diametrically opposite positions to
7. In a wire grinding machine having a. base,
a rotatable frame, a pair of trunnions at each
end of said frame, a, pair of spaced journal bear
ings on said base rotatably to support said trun
nions and frame, a central aperture through said
trunnions and frame for guiding wire to be .20
‘facilitate adjustment of said grinding wheel either
ground therethrough, means to rotate said frame,
" 10. In a wire grinding machine having a'base,
a' pair of opposed rotatable grinding wheels sup
ported on said frame, an independent pivotally
mounted support on said frame for each of said
a rotatable frame, a pair of trunnions at each,
wheels, said pivotal supports being arranged so
toward or from the work axis, and interconnec
tions between said plunger whereby only one of
said plungers may be rendered operative while
the other is maintained in an inoperative position.
end of said frame, a pair of spaced journal bear-- _‘
ings on said base rotatably to support said trun
nions and frame, a central aperture through said
trunnions and frame for guiding wire to be
ground therethrough, means to rotate said
that the grinding wheel axes swing along a path
substantially diametrically of said frame, an in
frame, a. pair , of opposed rotatable grinding
dependent motor-on each of said supports for
wheels supported on said frame, ‘an independ
independently rotating said wheels, an independ
ent nut and screw mechanism for adjusting each 30 entpivotally mounted support on said frame for
each of said wheels, said pivotal supports being
of said supports relative to said frame to feed said
arranged so that the grinding wheel axes swing
grinding wheels either toward or from the wire
along a path substantially diametrically of said
- to be ground, a star wheel operatively connected
frame, an independent motor on each of said
to rotate each of said feed screws, and a normally
inoperative plunger'which is arranged to be man 35 supports for independently rotating said wheels,
ually moved into operative position in the path
an independent nut and screw mechanism for
adjusting each of said supports relative to said
of said star wheel as it revolves to facilitate ad
frame to feed said grinding wheels either toward
justment of the position of the grinding wheels.
or from the wire to be ground, a star wheel op
8. In a, wire grinding machine having a base,
a rotatable frame, a pair of trunnions at each 40 eratively connected to rotate each of said feed
screws, and a normally inoperative plunger asso
end of said frame, a pair of spaced journal bear
ciated with each of said feed screws which is
ings on said base rotatably to support said trunq
arranged to be moved into the path of said star
nions and frame, a central aperture through said
wheels as they revolve independently to adjust
trunnions and frame for guiding wire to be
the position of each of said grinding wheels.
ground therethrough, means to rotate said frame,
11. In a wire grinding machine having a base.
a pair of opposed rotatable grinding wheels sup
ported on said frame, an independent pivotally
a rotatable frame, a pair of trunnions at each
-end of said frame, a pair of spaced journal bear—
mounted support on said frame for each of said
ings on said base rotatably to support said trun
wheels, said pivotal supports being arranged so
nions and frame, a central aperture through said
that the grinding wheel axes swingalong a path
trunnions and frame for guiding wire to be
substantially diametrically of said frame, an in
ground therethrough, means to rotate said frame,- ’
dependent motor on each of said supports for
a pair of opposed rotatable grinding ‘wheels sup
independently rotating said wheels, an independ
ported on said frame, an independent pivotally
ent nut and screw mechanism for adjusting each
mounted support on said frame for each of said
ofrsaid supports relative to. said frame to feed
wheels, said pivotal supports being arranged m
said grinding wheels either toward or from the
wire to be ground, a star wheel operatively con- ‘ , that the grinding wheel axes swing along a path
substantially diametrically of said frame, an in
nected to rotate each of said feed screws, and
dependent motor on each of said supports for
a pair of normally ‘inoperative spaced plunger's
independently rotating said wheels, an independ
which are arranged to be moved into the path
ent nut and screw mechanism for adjusting each
ienjsaid star wheel at diametrically. opposite po
of said supports relative to said frame to feed
sitions to facilitate adjustment of said grinding
wheel either- toward or from the wire to be
said grinding wheels either toward or from the
ground. .'
r
wire to ‘be ground, a star wheel operatively con
- 9. In a wire grinding machine having, a base, - nected to rotate each of said feed screws, and a
a rotatable frame,’ a pair of trunnions at each , pair of normally’ inoperative spaced plungers
end of said frame, a pair of spaced journal bear
which are arranged to be moved into the path of
ings on said base rotatably'to support said trun
movement of each of ‘said star wheels at diamet
nions and frame, a central aperture through said
rically opposite positions to facilitate independ
trunnions' and frame for guiding wire to be
ent adjustment of each of said grinding wheels
70
ground therethrough, means to rotate said frame,
either toward orfrom the work axis.
a pair of opposed rotatable grinding wheels sup
'
CARL A. CARL-SON.
ported on said frame. an independent pivotally‘
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