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Патент USA US2406508

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Aug- 27, 1946- >
R. A. PAPSDORFA
SELF-ACTING
‘
STOCK
FEED
Filed March 2, 1945
$406,503
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s Sheets-Sheet 1
Aug- 27,1946-
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‘1
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R. A.,PAPSDO'RF
SELF-ACTING
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' 2,406,508
STOCK FEED
Filled March 2, 1945
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5 Sheets-Sheet 2
5K
. Aug- ‘27> 1946»
_
' R. A. PAPsDoRF
2,406,508
“SELF-ACTING STOCK FEED
Filed March 2, 1945
5 Sheets-Sheet .3 -
a;
m
Aug. 27, 1946.
‘
R. A. PAPSDQRF
'
SELF-ACTING
’
STOCK
-
FEED
FiledMarch 2, 1945
‘2,406,503
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,
V
5 Sheets-Sheet 4
in
hnrrn. Papa (an; .
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pvvawrok;
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Aug. 27, 1946.
' ~ R. A. IPAPSDOé-F
2,406,508
SELF-ACTING 'STOCK FEED;
Filed March 2, 1945
@7/
5 Sheets-Sheet 5
Patented Aug. 27, 1946
2,406,508 '
UNITED STATES PATENT OFFICE
2,406,508
SELF-*ACI‘ING STOCK FEED
Robert A. Papsdorli', Los. Angelesi Calif.“
Application March 2, 1945, Serial No. 580,577
22 Claims. (Cl. 164-1171)
1
This invention is in the, art of punch press ‘
equipment for machine shops, and its concept is,
in improvements in means for feeding strip. stock
Figure 8 is an elevation showing the rear side of
the. clamp and a portion of the bed frame. '
Figure 9 is a plan of a double action feeder in= ‘
to the press dies,v or other given working parts.
volving the same principles asset out as to Fig. 1,
It is an, object. of this invention to. provide a. Cl and Figure- 10" is front elevation thereof. Figure '
simple, highly ef?c-ient, practical, substantial and
reliable. mechanism for alternately holding the.
work strip and for alternately automatically feeds.
I1 is across-section (vertically) on line !I—H of
Fig‘. 10:. Figure 12' is a vertical section on line
l2.——l.2 of Fig. 11. Figure I3 is a horizontal plane,
ing. the strip in predetermined amounts length
section on line. I3—-.I3 of Fig..l0 of a rod‘ and'vise'
wise) _, to the work performing, tool parts in a 10
assembly;
given'press. It. is to be understood,v however, that
the use of the feeding mechanism is. not limited
A further object of the invention is to provide
circuit in a two-wire cable 5 serving a solenoid- 6,
vide a self-acting control for the pressure
activated vise.
Also. an. object of the invention is to provide
punch press with but little or no tooling or ma!
will engage the normally’ open lever of the switch
andv close the switch whereby to effect closure of
I Fig. 2.
'
a unitarily organizedholding; and feeding mecha
nism. readilyrbodily attachable to a given type. of
'
ram 3 of the press rises an abutment 2a thereon
1,5
210
An additional object of the invention is to pro=
device.
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of the feeding means is an electric switch 2,‘
though other devices may be used instead as the
to. punch presses- .
‘a press controlled, independently powered stock
feeder including a separately powered, stock vise
and vise reciprocating assembly; it being an ob:
ject, in this connection, to provide. for fluid pres,
sure activation. of. the. vise and its reciprocating
'
In the present disclosure the primary controller
A feature of this invention resides in a more
or less unitary frame or bed ‘I which carries all
of the, mechanical means used here to hold or
to step-by-step 'feed the given stock strip Hl.
Therefore the organized assembly can be readily
bolted in suitable position on the table 411 of the
as
press.
I
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The solenoid 6 is fixed on the outer end of the
bed ‘I- and has a reciprocating, axial core I l suit
chilling, or alteration of the. original machine or
ably affixed to the stem ii‘ of a cylindrical valve
12 closely ?tting in a valve ‘chest. I3 and having
The invention resides in. certainnovel concep 30 a cross-port- H, which vin the position. shown in
tions improving the art of stock‘feed to given “ Fig. 2‘ delivers fluid pressure ('air preferred) from
apparatus, such as punch presses, as set forth in
a constant pressure chamber £5 to a power-duct
the ensuing text and having, with the above, addi!
Hi feeding one end of a pressure cylinder I"! to
force a piston l8, therein, far to the right. Mean;
tional obiects and advantages as hereinafter de-v
press.
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veloped. and whose constructions, combinations,
while operating fluid. is exhausting by way of one
and sub-combinations, and details of means and
the manner of operation will be made manifest
in the following description of the herewith ile
lustrative embodiments; it being understood that
modifications. variations and adaptations may be
nately Opened by passage of relative ends of the
valve I! to clearance position from these ports.
The. valve I2 is normally pulled to the position,
in Fig. 2 by a light spring 21 to effect‘ movement
of two exhaust ports [9. and 2a which are alter
resorted to within the scope, spirit and principle
of the piston l8 to an idle or right end location i
of the‘presently claimed invention. .
Figure 1 is a front elevation of the combined
punch press, the stock feeding unit, and the
feeder control. ‘Figure 2 is a longitudinal plan
and sectional view of the fluid powered,‘ vise reg
ciprocator. Figure 3 is a plan of the assembled,
in, readiness to. be driven to the left- instantly the
ram 3 closes the Solenoid circuit. When this cir
cuit is closed the valve snap-s to the right and: its
port it registers with a power port [6" feeding
pressure to the right end of‘the piston l8 with
the: consequence that this is rapidly'driven on its
unitary feed mechanism; With-the stock holding
clamp and the travelling vise, and end sets of
used to e?eot leftfeed of the stool; strip lil- EX
.
functioning stroke tov the left; this stroke being
stock guide rollers. Figure 4 is a front elevation. 5.0 haust of ?uid from the left end oi the cylinder H
of the holding clamp and the, vise,.and the guide
rollers, and the assembly bed frame. Figure .5
is a cross-Section of. the vise and the stationary
supporting rails. Figure 6 is a leit end elevation,
and Figure '7 is a right end elevation; as to Fig. 4‘
is by way of the port or duct .16 and exhaust- port
2!]. when this latter is uncovered by the valvev 12.
As soon as the. solenoid is desenergized the spring
2| again retracts the valve IE and ?uid pressure
returns the piston to the right end of the cylinder..
' 2,406,508
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The travelling vise
‘therefore act to press'the bar ?rmly onto the -
7
interposed strip [0.
Means are provided whereby to intermittently
V
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.
End pairs of vcontrol and guide rollers 46 are
grip and release the strip l0 and this means is
mounted on the ends of the box 4| and the
automatically reciprocated by the aforesaid piston
bearing frame 7, Figs. 3 and 4, to vertically and
laterally guide the stock through the feeding
l8; in onedirection whilst the vise is gripping and
in the opposite when the stock is free in the vise.
The piston l8 has and 22 passing from the
cylinderhead 23 and rigidly a?ixed to a block
24 forming the body of a vise device which» is
assembly.
'
Double action feed means
In Figs. 9 to 13, inclusive, the mechanism shown
slidably mounted on a pair of ?xed parallel tubué 10 is designed to positively feed the stock ID at each
lar or other- rails;25-25; clearly shown in Figs.
stroke of the punch 3 of a press which is pro
73 and 4.
vided with a switch 2’ of such type that current
_ Extending from the constant pressure chamber
IE is a flexible hose 2B constantly supplying ?uid ,
pressure to a feed port’ 21 in the vise body block‘
;will excite the solenoid 6, Fig. 9, on each stroke
.of thepunch. Fig. 12 shows the solenoid rod
pulling the valve l2 to the left to serve air to the
24 and which is alternately'openedand closed
by a spool valve 28 more or less freely sliding
endwise in the block to supply pressure to or stop
it from a chamber 29 in the block and in which
a' piston 39 is constantly resisted by an up
thrusting spring 3|.
port lb‘ of the cylinder I1, and open exhaust port
IS; the piston I8 being driven to the right. In
this device there is an adjustable bumber screw
20
When the'valve 28 opens '
?ow to the chamber 29 the .piston 30 moves down
and by its rod 32 rocks alever 33 pivoted in the
block'and having one end engaginga button 34‘
50 whereby to stop the piston at any desired
right end position and thus regulate the amount
of ‘stock feed at each piston stroke in eitherv
direction.
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.
"For the purpose of advancing stock to the left
at each reciprocation of the piston the rod 22 is
25
pressed down bygits spring 35. The button is
attached by a block 5!, Fig. 13, to the near end
?xed to a push rod 36 ‘having ?xed on its upper
of a carrier or slide bar 52 mounted in ways 53,
' end avise jaw'3l. ' Close above the moving jaw
parallel to the cylinder I1, and to the bar 52 is
3'! is a ?xed upper jaw 33 which cooperates with
?xed a parallel rack 54 constantly meshing?‘with
the lower jaw to grip an interposed portionyof
a pinion 55 whose‘upper rim portion meshes with
30
the stock strip ‘l 9 which is to be fedinto the press.
a rack‘bar ?xed ‘to and carrying a slide 51 run- '
The normal position of the jawS'l is as it is when
ning in ways 58.
‘
" v
it is under pressure by way of the ?uid activated
In’Fig. 13 the rack v54 is shown rigidly attached
' piston 30 and that isxwhile the \main piston I8 '
is to the‘right limit, Fig.2, as then also is the
vise 24.
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to the lower part of a stock feeding vise 59; a
35 like vise 59 being rigidly a?ixed torthe upper .bar
55. These vises?have spring raised pistons 6|.
With the objective of simplicity, the vise valve
28 is self-acting and of utmost simplicity in con
whose rods 6|’ have ‘press'er jaws 62 driven'down
" I struction and is motivated by its own kinetic
7 control valve 28a (of the same principle as set
energy; preferably. 'Therefore valve28 is here
shown in Fig. 3 as extending entirely through the
block or body 24 and having enlarged heads 28'
which not only give it desired weight but further
serve as valve stops at the ends of its reciproca
when air pressure from a relative momentum,
40 out above asxto the valve 28),opens air port 21a,»
when in'position XI, Fig. 9. When the valve 28a
shifts to position like X2 9. relative exhaust port:
23x is opened tovent the trapped air'and let the
piston rise and lift the effective'jaw 62?from the
tions in the vise body 24; the valve having suf? 45 stock. Solong as air pressure is. applied to the cient‘stroke to open and close theport 27. In
jaw‘ of either vise '59 or. 6!! the stock is clamped
Fig. 3 the valve 28 is in effective vise jaw closing
on the stock rest 63 of the vise and then as either '
position and the vise is considered as moving to
rack 54 or 55 is shifted toward the left the gripped >_ 7
the left and the stock In is being shifted in the
stock is fed tothe press.
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direction of the arrow." ' When the vise reaches
Sudden stop of the piston l8 and thereby the
the end of its'feeding stroke the energy stored 50 related Vises, in either direction of their move-:
in the spool valve 28 will cause it to'automatically ‘
ments, causes the momentumjvalves28a‘ to be
shift to the left and to stop ?ow of ?uid pressure
instantly: shifted from an open to a closed posi-..
to the vise piston 30' and the compounding lever
tion, or vice versa: one or the other of these Vises.
33 will release the jaw-3T of clamping elfort on
feeds stock at every stroke ‘of the driving piston
55
the stock strip. Therefore, when the ‘main valve
18, but only the vise thatis' moving toward the
[2 is released. by the-solenoid the spring 2| re-‘
left is effective on'the stock. The vise valves are
tracts the valve l2,v and the piston and its con
fed'air constantly from a common supply head
nected vise rod 22 and the vise 24 all shift to the
l5av,'which also feeds the'inoto'r valve l2.
right free from the stock It).
‘
‘ ‘
A presser foot 45a, Fig. 10, acts tohold the
Means are provided whereby to exert, con 60 stock still while notfeedingly gripped byQa vise. ‘
stantly, a ?rm pressure on' the strip I 0 so that
What is claimed is:
’ it will not be moved to the right in'the interim
.1. In an automatic stock feeding mechanism: '
of'right hand stroke of the vise 24; and yet which
the combination of a double-action. ?uid pressure I
will not interfere with left hand feed of the stock
operated, reciprocating motor, a vise reciproca-'
by like motion of the effective ivise. This means 65 tive by said motor and includingra self-acting
as disclosed here includes an elongate clamp bar
clamping and self-releasing device, and a master;
49 disposed above and along a box or cover plate
control for the motor adapted for operation bya ~
M which houses the above set forth pressure
coacting part of apparatus to which .the stockjs
‘chest and cylinder relative to the main piston
18; this cover plate forming arplatform for the
incoming_'strip; as-frorn reel 42. The bar has
pins 43'interengaged with the near ‘ends of over‘
hanging levers 44; Figs. 7 and 8, andywhose outer,
ends are up-thrust by’ jack springs 45 which
to be fed. ~
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2. In a stock feeding mechanism: the combi-,
nation of a, reciprocating motor, and a reciproz-l
cable; self-acting stock gripping and self-‘acting
releasing vise, and a, drive connection between
the vise and the motor, and a motor controller’
2,406,508
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adapted for actuation by a coacting part of ap
paratus to which the stock is to be fed.
3. The combination, in a stock feeder, with a
it from interposed work and including a part
motor having a reciprocable part: of an auto
matic, power activated Vise reciprocative by said
part and including a self-acting device to both set
and to open the vise, and a master controller for
controlled by vise motions, power means con
nected to and reciprocating th'e vise, an auto
matic control apparatus for said power means,
and a clamp to hold the stock when the stock
is freed by the vise.
14. The'feeder of claim 13; said vise setting
the motor adapted for operation by apparatus to
which the stock is fed.
means including a pneumatic motor having a
bodily reciprocated by the motor.
and a self-setting and self-opening vise bodily
vise-motion motivated valve.
4. In combination: an independently activated 10
15. The combination with a punch press hav
master controller; a prime motor controlled
ing a reciprocating ram, of a mechanism to in
thereby, and an independently motivated vise,
termittently feedstock to the press and includ
to grip stock to be fed, which is bodily recipro~
ing an organized, bodily installable assembly
cated by the motor, and a momentum device to
comprising a mounting having a solenoid whose
alternately self-set and self-release the vise.
15 circuit is controlled by said ram, a pressure ?uid
5. In combination: an independently activated
operated motor having a valve connected to the
master controller; a prime motor controlled
core of the solenoid for stroke in one direction
thereby, and a self-setting and self -releasing vise
thereby and an automatic retractor for the valve,
6. A stock feeding device comprising a unitary
'reciprocated by the motor.
assembly adapted to be bodily attached to or re
15. A pneumatic vise for feeding stock to a
moved from a given work handling apparatus
press, including a bodily movable structure hav
and which assembly includes a reciprocative,
ing a stock rest, a cylinder and a piston therein
power actuated stock vise and means to recip
having a jaw to grip stock on the rest, means to
rocate the vise, and a common bodily portable 25 automatically retract the piston and the law
mounting for the vise and said means and which
from the rest, and a momentum activated valve
is adapted for aforesaid attachment, and a self
for supplying air to the piston cylinder during
acting power control means for effecting auto
shift of the vise bodily in one direction and
matic gripping and automatic releasing vise ac
to cut off air on reverse shift of the vise.
tions.
17. The combination with a punch press, of a
'7. The device of claim 6; said vise control
plurality of self-acting gripping and releasing
means being kinetically motivated.
action vises, means for concurrently shifting the
8. The device of claim 6; said control includ
vises bodily in opposite directions, and a press
ing a self -mo-tivate<:l control member.
actuated control for said means; said vises having
9. A stock feeding device comprising a unitary
control means whereby each is made effective to
assembly adapted to be bodily installed in ef- ‘
grip stock when the Vises shift in one direction
fective combination with a given work machine
only and release it on reverse shift.
and including an independently motivated vise
18. An electro-pneumatic feed apparatus for a
means having a self-setting and self-releasing
stock working machine; having a pair of vises, a
gripper, and stroke making means which are
pair of carriers to which they are respectively
interconnected so that the vise is shifted to and
?xed, means for concurrently shifting the car-,
fro to feed interposed stock when clamped in the
riers and their Vises in opposite directions, and
said vise.
self-acting means for automatically setting the
10. A strip stock feeder for a work performing
vises on and automatically releasing the vises
machine, having in combinationr'a power motor
from the stock at given reciprocations.
having a piston rod, a' power actuated vise includ
19. The apparatus of claim 18; said setting and
ing self-setting and self-releasing grip means,
releasing means including air driven pistons, and
said rod connected to said vise to bodily recipro
automatic momentum valves for control of the
cate it, and a master controller for the motor and
pistons.
,
including a part adapted to be actuated by an
20. The apparatus of claim 18; said shifting
element of said machine.
means including a pneumatic motor for actuat
11. In a stock feeder for a work performing
ing the carriers, and an automatic control for the
machine: a double acting, pneumatic motor hav
motor.
ing a piston rod and a reciprocating valve, a
21. Apparatus, for feeding stock to a stock
solenoid whose core is connected to the valve to
working machine, including a pair of vises and a
shift it in one direction, means to retract the
pair of carriers to which they are respectively
valve, a controller for the solenoid which is op~
?xed, means for concurrently shifting the car
erable by a cooperative part of said machine, a
riers and their vises in opposite directions, and
power-set vise connected to and bodily recipro
means for automatically setting the vises on the
cated by said rod, and an automatic control for 60 stock at given reciprocations; said shifting means
set and release of the vise.
.1
including racks ?xed to the carriers, a pinion
12. The feeder of claim 11; said vise control
engaging and reversely driving the racks, and a
including a self-shifting valve controlling power
motor connected to and reciprocating one of the
flow to the vise.
.
13. In a stock feeder of the class described: a 65
carriers.
22. The apparatus of claim 18; said setting and
mounting structure for bodily attachment to a
releasing means including a pneumatic motor
given machine, a system of guides on the struc
having self-actuated, double-action air'valve.
ture for work stock control, a stock vise guidedly
reciprocative on the structure, a self-acting
ROBERT A. PAPSDORF.
means to alternately set the vise on and release 70
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