US2116326A - Punch press - Google Patents

Description

May Y3, 1938. o. E. sElFFERT' 2,116,326

PUNCH PEss Filed Nov. 17, 1956 5 Sheets-Sheet l INVENTOR By QM f. Wawy ATTORNEY May 3, .1938.

O. E. SEIFFERT PUNCH PRESS Filed NOV. 17, 1956 5 sheetsms'hee; 2

011-0 E. SE/FFERT eh mm. A .w i MQ May 3, 1938. o. E. sElFFERT a PUNQH PRESS 1936 5 Sheets-Sheet :3

Filed Nov. 17

May 3,V 1938. o. E. SEIFFERT `PUNCH PRESS Filed Nov. 17, 1956 5 Sheets-'Sheet l4 V T M m` T www .m/M M f T @ffm ww@ ATTORNEY PUNCHPRESS Filed Nov. 17, 1936 5 Sheets--$heet 5 '0770 E. Sel/:Amr

INVENTOR ATTORNEY `Patented May 3, 1938 UNITED STATES PATENT OFFICE PUNCH PRE S S 16 Claims.

My invention relates topunch presses and has particular reference to presses adapted to form various articles from sheet metal.

The object of my invention is to provide a punch press which can be used to produce several individual parts and to assemble them into a more or less complete article during one cycle of operations of the press. For this purpose I provide means to support several dies producing corresponding number of pieces during each stroke of the ram of the press, there being preferably several strokes of the ram during one revolution of the main flywheel of the press. I also provide supplementary reciprocating members, also operated by the main flywheel, likethe ram, which can be provided with means to support various tools for performing additional operations on the pieces produced by the dies, also for assembling these pieces together, including certain parts delivered to the press from the outside sources.

Another object of my invention is to provide means for stopping andA starting the driving. mechanism within several cycles `ora. fraction ofi a cycle, the stopping means being manually controlled, including a remote electrical control. For

this purpose I provide a clutch, preferably of a jaw type, between the driving flywheel and the driving shaft in` the press, and a cam-shaped bushing on the driving shaft, which is under action of springs tending to press it against the clutch thereby engaging the latter. The cam` is moved by a pin in the frame, which can be moved in and out of engagement with the cam. B-y releasing the pin, the driving shaft can be made to stop at a desired point in the operating cycle of the press, for instance. when the ram and the reciprocating members are moved away' from the dies.

Another object of my invention is to provide plurality of sliding bars or slides radially extending from the operating zone at the dies to the sides of the press, the slides being `operated by rotary cams mounted on exposed ends of shafts? operated by the main driving shaft; Withk this arrangement it is possible to easily and` quickly' For this purpose I provide replace the various cams Without disturbing any other parts of the press, having at the saine time a number of slidesreciprocating in direction of the operating zone, and which can be arranged to perform Various additional operations on the articles being produced by means of various tools mounted on the inner portions of these' slides.

Another object of my invention is to provide a number of cam members on the end of each shaft, each cam member operating a separate slide, the slides operated by one shaft being arranged in sliding relation to each other. The cams are preferably made of different diameters, the inner cams being smaller, so that the corresponding slides can be placed under the slides from the outer cams.

Still another object of my invention is to provide additional fixtures or tools for the slides in the form of turret heads and ratchet wheels, so that each slide can be made to perform several different successive operations during its several strokes during one cycle.

With my punch press it is possible therefore to perform o-n a single machine various operations which would otherwise require the use of several separate presses, drop hammers, assembling machines, and additional manual operations.. It is also possible to perform these various operations in a single automatic cycle, thereby obtaining a finished and assembled product directly from the machine without any intermediate manual or other operations.

My invention is more fully described in the accompanying specification and drawings, in Which- Fig. 1 is an elevational view of my punch press employing a toggle drive.

Fig. 2 is a similar view of a punch press ernploying an eccentric drive, showing also a feeding mechanism.

Fig. 3 is a detail View of a slide drive by cams.

Fig. 4 is a top plan view of the press shown in Fig. 2.

Figs. 5 and 6 are views of a belt buckle as made on my press.

Fig. 7 is a sectional view of a caster head as made on my press.

Fig. 8 is a detail View of a slide with a dial mechanism for assembling certain parts of an article.

` Fig. 9 is a detail View of a device forassembling parts of the caster head shown in Fig. 7.

Fig. 10 is a detail View of a turret mechanism for making the shell of the caster head;

Fig. 11 is a detail view showing the caster shell in the process of being assembled by the turret mechanism shown in Fig. 10.

Fig. 12 is a detail view showing a preliminary stage in the assembling of the caster head.

Fig. 13 is a detail view showing another preliminary stage in the assembling of the caster head.

Fig, 14 is a top plan view of the machine fully assembled.

My punch press consists of a` frame with a bolster 2 which may be formed integrally with the frame as shown. A ram 3 is slidably supported on gibs 4 and has a face plate 5 operating dies 6, 1 supported on the face of the bolster 2 in a usual manner. The gibs and the sides of the ram are made with a slight taper so as to provide a closer fit when the ram is operating the dies than when it is moved away from them. This insures more accurate t of the dies and conserves the cutting edges. The gibs are shown located hori- Zonta-ily, although, of course, they can be made inclined with a correspondingly inclined bolster. In a particular embodiment shown in Fig. 1, the ram is reciprocated against the bolster by a toggle mechanism consisting of levers 8 and 9 pivotally connected at I8 and ll with the ram and a toggle block l2. The latter is held by tie rods |3 and |4, the latter being cast in the frame The lever 8 is pivoted at I5 to one end of a toggle rod IG, the other end of which is journaled on an eccentric portion l1 of a shaft I8. The latter has a gear |9 in mesh with a gear 20 on a main driving shaft 2l. IThe gear 2li is shown of a larger diameter than the gear I9 so that the ram makes more than one stroke for each revolution of the main shaft. A gear 22 on a shaft 23 is connected by a belt or chain 24 with a hopper or feeder' 25 for small parts which are delivered through a chute 25 to dies for assembling with the stampings. These parts are also shown in Fig. 4, the gear 22 being shown in dotted lines and provided with a pulley 21 for the belt. A flywheel 28 freely rotates on the outer extension of the driving shaft 2| and can be connected by a belt with a suitable source of power (not shown) for its operation. The flywheel has one or more teeth 29 which can engage corresponding slots 3Q in a sliding jaw clutch 3|.

The ciutch 3l is keyed to the shaft 2| so that it connects the flywheel with the shaft when the tooth 29 engages one of the slots 38. The clutch is pressed against the iiywheel by springs 32. It has an enlarged cylindrical portion 33 with a cani-shaped edge 54 engaged by a pin 35 slidably supported in a bearing 38 in the frame. The pin is pressed by a spring 31 against the clutch 3|. When the clutch is engaged, it rotates with the shaft 2|, and the pin 85 follows the curvature of the cam-edge 34 until a projecting portion of the cam engages the pin thereby forcing the clutch back and releasing the tooth 29. The position of the hump on the cam is arranged so that the press stops when the ram is moved away from the bolster to facilitate work with the dies. The pin 35 has an extension 38 pivoted at 39 to a bar 40 having a pedal 4! at one end and being pivoted at the other end on a pivot 42. By stepping on the bar, the pin 35 is withdrawn and cannot then stop the machin-e. The pin has also collars 43 which can be engaged by a slot 44 in a hand lever 45 pivotally supported at 46 on the frame. In order to release the clutch for continuous operation of the press, the pedal 4l is depressed and the lever 45 turned by hand until its slot engages the pin between its collars 43 thereby retaining the pin in an inoperative position. To stop the press, the lever 45 is turned back thereby releasing the pin, which snaps in its position at the cam and stops the press as soon as the hump of the cam engages the pin. The lever 45 has an extension 41 connected with a plunger 43 of a magnet 49. This magnet is controlled by push buttons at convenient places and can be used for stopping the press from various remote points. It cannot be used to start the press, however, and serves principally as a safety device and to insure quick stopping if there is any fault inv the press operations.

A modified form of drive for the ram is shown in Figs. 2 and 4. The frame 58 has gibs 5| for a ram 52. A stub shaft 53 is journaled in a clevis 54 at the end of the ram, the shaft having a hole for the threaded end of a driving rod 55 held by nuts 56. The other end of the rod 55 has a bearing for an eccentric portion of a shaft 51 connected by a gear 58 with the driving gear 28.

The bolster 2 which supports dies 6 and 1 shown in Fig. 1, also supports feed slides 59 on rails 68, there being individual slides for each die. Two slides are shown but there may be a larger number of them arranged side by side, all operated by individual levers 6|, 62, connected with the slides by links 53. The levers and 82 are connected gears 64, 85 rotatively mounted between collars 66 on a shaft 68 fitted by its ends in the sides of a. frame extension 81. The gears 64 and 65 are in mesh with gears 83 and S9 keyed on a shaft 1|) journaled in the sides of the extension 61 and having a lever 1| on one end. l

The lever 1| has a slot 12 for a bolt 13 connecting it to one end of a link 14 the other end of which is connected by a bolt passing through a slot 16 with a lever 11. This lever is pivoted at 18 in a bracket 85 and has a sliding block 19 with a pin engaging a cam slot 8| in a cam cylinder 82 mounted on the end of a shaft 51. By changing the position of the bolts 'f3 and 15 in the levers 1| and 11 it is possible to change the rate of feed for stock 84, usually in the form of strips of metal. The feed can be also changed individually for each slide 69 by changing the respective gears 64 and 58 or 65 and 89. The cam slot 8| may be made for different length of feed stroke, and it can be made to produce one or more feed strokes during one revolution of the shaft 33.

The shaft 51 has a second cani cylinder 86 with a cam slot 81 engaging a pin 88 on the end of a slide 89. The other end of the slide has a notch 9|) or similar arrangement for holding different tools used for supplementary operations on parts stamped out by the dies from the stock 34. The end of the shaft 51 has a bevel gear 9| in mesh with gears 92 and 93 preferably at right angles to the gear 9|. The gears 9|, 92, and 93 are located in the middle portion of the press near the dies and substantially at the sides of an opening 94 for scrap falling from the dies. The gears 92 and 93 are mounted on the ends of shafts 95, 95 extending outside of the frame and having on their outer exposed ends cam cylinders 98 and 91. The cylinders have cam grooves 98 and 99 for rollers |00 and 59| on the ends of slides |l2 and |03. The slides |82 are placed under the slides |03, which is made possible by having the cam grooves 98 of a smaller diameter than the grooves 99, as may be seen more clearly in Fig. 3. The outer end of the inner slide |02 has an additional roller |84 resting against the inner Il O flange of the outer cam cylinder 91, thereby providing a better bearing surface for exerting a.

inner ends` mounted on the end of a short shaft |01 .coni nected With the driving shaftv 2| by spur gears |08 and |09. With this arrangement there are four sets of slides converging by their inner ends to a zone `of operations near the main dies 3 and 1 where they can be used to perform various supplementary operations on stampings or similar parts produced by the dies.

The four sets of slides, converging from four diiferent directions to the Zone of operations, are driven by three central bevel gears and two outer spur gears. This arrangement `permits to have a free space for the scrap hole 94 where otherwise may have been the fourth bevel gear for the slides.

By combining operations by the tools `on the slides with the operations performed by the main dies, it is possible to produce more or less complicated articles entirely automatically. One example of such articles is shown in Figs. 5 and 6 representing a belt buckle ||0 with a claspy l. Another example is shown in Fig. 7 representing a stamped head of a caster with a disc l 2 wedged between the ends of the head I3 and provided with a central bearing H4. The method of making this article is shown in Figs..8 to 13 incl. For this work a turret head I 4 is employed rotative- 1y mounted on a pin 5 fitted in the end portion of the slide |02. The head ||4 works against a die IIB by its tools ||1, IIB, and H9. A ratchet wheel is mounted on thehead H4 and is turned by a pawl |2| pivoted at |22on alstation ary portion of the frame of the press.` A punch |23 is also mounted on the slide` i 02 and works in cooperation with adie block |24. A suitable punch (not shown) pierces holes in the strip B4 into which bearing bushings ||4 are fed by a chute 26 from the hopper 25. Discs ||2 are then punched out of the strip 84 and left in a circular dieV in a hole |26. The punch |23 separates a blank |21 from the strip 84. The blank is then formed into the head ||3 in the die H5 by the tool ||1 as shown in Fig. 10. The slide 89 turns the die 25 by a pawl |28, bringing the as.- sembled disc H2 with the bushing H4, which has been riveted in its place by a suitable tool (not shown), under a guiding block |29. A plunger |30, operated by a slide |03, `brings the disc ||2 in alignment with a slide |3| moving in a slot in the head |29 by the end of a lever |32. The lever |32 is mounted on a pin |33 supported von the frame of the press. The other end of the lever has a pawl |34 operated by the slide 89 hav ing ashoulder |35. The slide |3| moves the disc H2 into the open `end of the head H3 whose flanged upper portion remains suiciently open on top at the side to admit the disc. A movable f guide |36 temporarily retains the discuntil it is wedged in its place by the tool H8 as shown in Fig. 13. The tool H9 finally closes `the edges of the head I3 over the disc, and the assembled part is ejected by an arm |31 fitted on the frame of the press. A pin 38 guides the disc l2 when it enters the bushing 4.

One of the important advantages of -my press is that it can automatically perform a variety of operations usually requiring several separate machines plus some hand labor. By combining several independent feeds for separate dies, it is possible to make several `separate stampings by a single stroke of the ram; the working stroke of` the ram occupying a fraction of one revolution of the driving shaft, the remaining portion of the revolution can be used for performing additional y.

operations on the stampings. delivered from the main die, using for these additional operations multiple slides working from four different di rections, there being more than one slide in each direction; these additional operations can be further expanded or elaborated by using ratchet operated dials and turret heads on the slides; using these various devices to assemble together parts made on the different dies of this press, in-

cluding also parts made o-n other machines andv delivered by separate feeding devices.

Another important advantage of my press is that it can be easily changed from a toggle ram to an eccentric ram, the rest of the machine including its drive rem-aining unchanged. This is important when it is desired occasionally to change the type of work on the press: for light work, where a low power expenditure is preferred, the eccentric drive will be used; and for a heavy work it may be changed over to the toggle drive.

Another important advantage resides in the construction of my clutch. The cam 34 can be provided with as many projections to be operated by the pin 35, as there are strokes of the ram in one revolution of the driving shaft, and

the projections can be located so that the clutch Y theoperation of the ram when the operation is I no longer wanted or is dangerous to the Work. This feature of the clutch is especially useful in connection with the electromagneticV control of the pin 35. The magnet can be controlled by push buttons placed conveniently in various places around the machine where the operator may need them for stopping the ram in time to prevent its operation, or where some adjustments may be needed. The magnet can be also controlled automatically, and some of the applications of the automatic control are shown in Figs. 8 and 10. Here an automatic switch is shown, consisting of a stationary contact plate |38 mounted on an insulation post |39 on the bolster or on the die vided with two legs in case of two strips of stock` being fed into the dies.

A lug or button |42, made of an insulating material, extends from the plate |40 down'and `rests against the-strip 34 or 84', thereby keeping the end of theplate |40 away from the plater|38. The plates |38 and |40 are included in the cir` cuit of the magnet 49, `so that this circuit remains open as long as there is a strip of stock being fed intoone of the dies.

As soon as one'of the stock f strips is all used up, the button |42 drops down and the end `of the resilient contact plate |40- l comes to rest against the end ofthe plate |38, thereby closing the circuit for the magnet 49 and stopping `the machine. magnetic `indicators |43 of an ordinary construction, preferably mounted in an indicator board |44 One of the electro? l on the side of the press, is also included in the circuit ofthe contact plates |38 and |40, so that the operator will instantly know Ythe reason-Why. the press stopped, by glancing at the indicator-- board. Other indicators, suitably numberedor4 provided with symbols or Wordsfare"connectedftf to various other automatic switchesronthe press. Another automatic switch, shown in conjunctionr with the plate in Figs. 8 andlO, althoug-hfit`r can be used independently, is used'to 'stopthe/ press in case the dies and other 4devices .become-v defective and will not let the strips, moved byfthe4 feeding devices, to pass through, so that the strips will begin to buckle.l This switchiconsists of a stationary contact plate |',='shown as an extension of the plate |40,.and a movable resilientv z plate |46 located under the stationary Aplate `and supported on an insulation post |41. The plate'sf:l |45 and |46 are included in the circuit. of `the magnet 49 and close this circuitwhenthe strip 84 #becomes-buckled; risingfrom the surface of the bolster. or die, and ypressingfthefplate |46 l againstfthe. plate* :I 45u A- separate 'indicator is. includedin this circuit;

Another automatic switch is formed with` a photoelectric tube |48 placedunder a hole |49 inY Athe die or in-thepress, over whichis' moved .the

stripf84 or 84"- after a punching operation. An` ordinary electric lamp |5iis placed opposite fthe photocelly |48 and energizeslthe latter when therv light passes through a hole"|5|fpunched in` the stock 'by the die.y The currenty in this Acase is 1 usednto render inoperative the-magnet circuit which otherwise'would be closedI bythe movement of thel strip 84 from'the die.

Automatic switches are also :used in mypress to indicate any defects in forming operations'ias shown in Fig. 10. Here aresilientcontact'member |52`issupported on aninsulati'on post |53 i and presses by its point'lon a flange y|54-ofr an' article ||3 being formedin a bendngdie. Thepoint is insulated from the rest ofthe-plate. Another contact plate |55, which can be mounted on the same insulationpost |53,is adapted to be depressed by the descending larmfof the punch |23.,.thereby bringing the hooked'end'of the plate |52y in opposition toa hooked endv of 'the plate |55 as shown in Fig. 10. The plates-.become sepa-'- rated by the flange |54,A keeping the magnet; circuit disconnected. The circuit becomesk closed,v .f however; if the-flange is-:notformed in its proper Vplace, indicating', defect inl thestockrorV intthev-` dies.

It is understood that`- my punchipress fca'n'vbe f modified without `departing fromrthespirit' of my invention as set forth in the appended claims.

I claim asmy invention:`

l.y A punchy press comprising a bolster Y"and Va f ram, means to reciprocate-the ram .againstthe bolster, a driving member adapted'to operatey the reciprocating means, an electromagnetic means to render the reciprocating vmeans inoperative,

dies on the bolster, means to feed stock.k into the s dies, andapluralityof contact members adapted to be operated bythe stockiand adapted-to lrenderV the electromagnetic means-operative'when the .progress of the stockideviates from normal.

2. A punchfpress comprising a pluralityofmeciprocating members "adapted to supporttools, a driving member adapted: to vsuccessively operate the reciprocating members during its one. revolution, an electromagnetic means to'frenderthei driving member inoperative before the' next op;v erative movement of the next reciprocating member, means to feedstock for'the tools, and a` plu' rality of switches adapted 4to be operated by the f Lstoclt `.under action of; the. .tools .andl adapted-to I- amasser`I render the electromagnetic meansoperative when f the results ,of operations of the/feeding means:

and tools deviate fromnormal.

3.A punch press comprising a bolster and a ram; a driving member, means to reciprocate the ram by the drivingmember, a centralgear mechv anism operatively connected with the driving.; member, shafts radially extending from the gear,v mechanism, ,carri members on the outer exposed i:

ends of the shafts, tool slides adapted to be reciprocated by the cam members, dies adapted to be supported between the'bolster land the ram',

means to feed stock into the dies by one of. the.

cam members, tools on the slides adapted lto operate on the stock in cooperation withthe dies, v saidtools Yand :saidfdies being adapted to com.

plete .their operations during/one revolutionrof the driving memben'and means to automatically.

control said operations and their order of succession;

4. A punch press comprising a bolster and a ram, a plurality of dies adapted to be supportedr on the bolster and adapted to be operated by the ram, means to reciprocate the ram, a shaft, oper-vv ative connections between the shaft and the reciprocating meansya drivingmember, a clutch connecting the driving member andthe shaft', means to feedstock individually to the dies,

means to adjust the length of feed, a plurality of.V

tool supporting slides in cooperative relation to the dies, and means to individually operate the slides by the driving member.

5. A punch'press comprising a frame; a bolsteron the frame, a ram `movably supported on the frame, means to reciprocate the ram against the f bolster, the bolster being adapted to support a plurality of dies,'a shaft, means to operate thel ram by the shaft, a driving member for the shaft,

means to feed stock tothe dies, a plurality'of i' cams rotatively and replaceably supported at the exposed portions of the frame, means torotate the camsby theshaft, slides operatively connected with the cams, and means to support tools on the slides in cooperativerelationv to they to support respective positions of dies, a driving f member,` a plurality/of shafts extending in dif# f ferent directions outside of the frame, operative connections between the driving member, the

reciprocating means and the shafts, cams're'A placeably supported on the exposed portions of f the shafts, means to'feed stock to the dies, slides operatively connected with the cams and converging to a point at the side `of the dies, and means on the slides to support tools for additional operations on-the stock in the dies.

7. A punch press comprising a frame, a bolster formed on the frame, a ram movably supported on the frame', means to reciprocate the ram against the bolster, a driving member, operative connections between the driving member and the reciprocating means, the bolster being adapted to support a plurality of dies, means to feed stockr individually to the dies, a commondrive for the individual feeding means, a cammember adapted to operate the common drive and operatively connected with the driving member, and means to :djust the common drive for different rates lof fee 8. A punch press comprising a frame, a bolster on the frame, a tram movablysupported-on the frame, adriving member, means to reciprocate the ram by the driving member, the bolster being adapted to support a plurality of dies, means to feed stock individually to the dies, a common drive for the feeding means, a shaft operatively connected with the driving member, a cam member mounted on the shaft and operatively connected with the common drive, and means to adjust the rate of feed individually for the separate feeding means.

9. A punch press comprising a frame, a bolster on the frame, a ram movably supported on the frame, a driving member, means to reciprocate the ram by the driving member, the bolster being adapted to support a plurality of dies, a plurality of shafts operatively connected with the driving member, a plurality of cam members on each shaft, slides adapted to be reciprocated by the cam members, and means to support tools on the slides supplementing the dies.

10. A punch press comprising a frame, a b01- ster on the frame, a ram movably supported on the frame, the bolster being adapted to support a plurality of dies, means to reciprocate the ram against the dies, a driving member operatively connected With the reciprocating means, means to feed stock to the dies into an operating zone, a plurality of shafts radially extending in the frame from the operating zone, a plurality of cylindrical cam members on each shaft, slides extending from the cam members to the operating Zone, the slides from the cam members on one shaft being supported in slidable relation to each other, and means to support tools on the inner ends of the slides.

11. A punch press comprising a frame, a bolster on the frame, a driving member, a ram movably supported on the frame and adapted to be reciprocated by the driving member, the bolster being adapted to support dies in an operating zone, a plurality of shafts radially extending from the operating Zone, means to rotate the shafts by the dirving member, a plurality of cylindrical cammembers of different diameters on each shaft the inner cams being of a smaller diameter, slides extending from the cam members and operatively connected therewith, the inner slides from the smaller cam members being adapted to slide under the outer slides, the inner ends of the slides being adapted to support tools in the operating zone, and means to feed stock to the dies in the operating zone.

l2. A punch press comprising a frame, a bolster on the frame, a driving member, a ram movably supported on theframe and adapted to be reciprocated by the driving member, the bolster being adapted to support dies in the operating zone, four shafts extending radially from the operating zone, three outer shafts being connected by bevel gears at their inner ends, a drive shaft operatively connected With the driving member, and spur gears connecting the drive shaft with the fourth shaft and with the oppositely located one of the three shafts, the portion ofthe frame at the inner end of the fourth shaft being provided with an opening for the removal of scrap.

13. A punch press comprising a frame, a bolster on the frame, a ram movably supported on the frame, the bolster being adapted to support a plurality of dies, slides movably supported on the frame, a driving member, means to independently reciprocate the ram and the slides by the driving member, the slides converging by their inner ends to the zone of operations at the dies, one slide being adapted to support a die on its inner portion, the other slide having a turret head adapted to support a plurality of tools for cooperation with the die, and means to rotate.

the turret head by the reciprocating movement of the slide supporting the same.

14. A punch press comprising a frame, a bolster on the frame, a ram movably supported on the frame, the bolster being adapted to support a plurality of dies, slides movably supported on the frame, a driving member, means to independently reciprocate the ram and the slides by the driving member, the slides converging by their inner ends to thezone of operations at the dies, the slides being adapted to support tools cooperating with the dies, and a dial rotatively supported on a die and adapted to be rotated by the reciprocating movement of a slide, the dial being adapted to support a die and to transport a portion of Work from one set of tools to another.

15. A punch press comprising a frame, a bolster on the frame, a ram movably supported on the frame, a driving member, means to reciprocate the ram by the driving member, the bolster being adapted to support a plurality of dies, a

plurality of shafts rotatively supported in the frame, means to rotate the shafts by the driving member, cylindrical cam members on the shafts, slides movably supported on the frame, rollers on the ends of the slides engaging the cam members, the slides being adapted to support tools cooperating with the dies, thrust rollers on the ends of the slides, and flanges on the cam members abutting the thrust rollers, the thrust rollers being adapted to relieve the strain from the guiding rollers during the operating strokes of the slides.

16, A punch press comprising a frame, a bolster and a ram on the frame, means to reciprocate the ram, the bolster being adapted to support dies, slides movably supported in the frame, means to independently reciprocate the slides, the slides being adapted to support tools cooperating with the dies, a dial on a slide adapted to be intermittently `rotated by the movement of the slide and adapted t0 Support tools, means to feed stock to the dies and tools in the press, and a hopper adapted to feed semi-finished parts for assembling with the product from the dies and tools.

QT'IO E. SEIFFERT.

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