US512097A - Stamping and punching machine - Google Patents

Description

(No Model.) 3 Sheets-Sheet 1.

J. CASEY. I STAMPING AND PUNGHING MACHINE.

No 512,097. Patelited Jan. 2, 1894;

(160 Model.) s snets -sheea 2.

J CASEY. STAMPING AND PUNGHING MACHINE.

No. 512,097. Patented Jan. 2, 1894.

WITNESSES:

(No Model.) 3 Sheets-Sheet 3.

JIGASEY. STAMPING AND PUNGHING MACHINE.

No. 512.097. Patented Jan. 2, 1894.

w 2 3 m 3 y l UNlTED TATES inns JOHN CASEY, OF BALTIMORE, MARYLAND, ASSIGNOR TO JOS. S'lELWAGONS SON, OF PHILADELPHIA, PENNSYLVANIA.

STAlVlPlNG AND PUNCHlNG MACHINE.

SPECIFICATION forming part of Letters Patent No. 512,097, dated January 2, 1894.

Application filed August 16, 1893. Serial No.4831289. (No model.)

To all whom it may concern.-

Be it known that I, eTOHN OAsEY,ot Baltimore, Maryland, have invented certain new and useful Improvements in Stamping and Punching Machines; and I do hereby declare that the followingis a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying d rawin s and to the cw letters and figures of reference marked thereon, which form part of this specification.

This invention relates to certain improvements in sheet metal stamping or punching machines.

The object of the invention is to provide an improved feed for punching or stamping machines exceedingly simple in construction and sure and effective in operation, whereby a number of blanks can be automatically fed to the dies as required and consecutively punched or stamped as desired.

The invention consists in certain novel features in construction and in combination of parts more fully described hereinafter and particularly pointed out in the claims.

Referring to the accompanying drawings: Figure 1 is a perspective view showinga machine for punching or stamping provided with my present improvement. Fig. 2, is a detail perspective view ot the rotary die plate and its supports and attachments. Fig. 3, is a detail top plan view of the die plate support. Fig. 1-, is a sectional view through the die plate and its supports and attachments. Fig. 5, is a detail sectional view through the die plate and its supports showing the cam surface which elevates the pins in the dies of the die plate. Fig. 0, is a detail sectional view of the punch or stamp.

In the drawings the reierenceletter u, indicates the frame and supports of an ordinary bumping or stamping machine, and I), indi cates the table thereof located beneath the reciprocating head f, operated by the weighted lever (Z, fulcrumed in the upper part of the frame,

0, indicates the treadle suitably fulcrumed in the lower partof the machine and suitably connected to the outer port-ion of the lever d, by means of the linl; c, at the rear of the frame.

Although I show a foot power machine Ido not wish to limit my invention to use with a foot power machine as it is preferred to use the invention with steam or other suitable power machines.

The stamp or punch g, is suitably secured to the lower end of the head to form one memberof thedie; thefaceot this punch is formed to produce the shape desired, and the punch is detachably secured to the head so that punches of various shapes can be employed in the one machine. This punch is formed with a central longitudinal opening in which a spring pin 7t,is located. This pin projects a slight distance below the face of the punch and is surrounded by a coiled spring which, while constantly tending to force the pin outwardly, allows it to yield upwardly. The pin in its lower face is provided with adepression to receive the perforatingpin of the die. This spring pin also serves the purpose of throwing the stamp or punched articles from the punch-as it moves upward to leave the die, thus preventing the piece of sheet nietaljust punched from adhering to the punch.

On the table Z), of the machine frame abase platej, is suitably secured. The rotary die plate is, is concentrically mounted on a cen- So tral pivot so as to be supported by and turn on the base plate and have a strong rigid support. The die plate or block turns on a central axle or bolt 7 which passes down through the same into the base plate. This die plate is provided with any suitable nun ber of female dies (or male dies if desired) circularly arranged around the axle thereof. Each die is formed to lit the stamp orpuncher g, and the dies are arranged to pass in suc- 9o cession beneath the stamp as the die plate is revolved. This die plate is preferably formed of an integral block of metal and the dies are formed by depressions therein in which the stamp exactly tits.

\Vhen it is desired to stamp caps, tops, or the like with central holes, each die is pro vided with a central perforating pin a, arranged to normally project just su't'liciently above the bottom of the die to punch a hole 100 in the metal when the stamp descends, the

point of the perforating pin entering the recess in the bottom face of the spring center or pin of the stamp. These perforating pins extend through the die plate and have heads projecting beneath the same, and a coil spring n, on each pin tends to force the same downwardly to its limit of downward movement. The base plate is provided with a circular groove 0, in which the heads of all the pins move. On one side, this groove is provided with a raised or elevated cam portion p, in its bottom having beveled edges as shown. This cam portion is so arranged as to engage the head of each pin immediately after the die has passed from beneath the stamp and to force up the perforated pin through the die so as to lift the sheet metal cap or other articles that have just been stamped out of the die for the purpose hereinafter described. Each die is also provided with a lifting or ejecting pin q, extending down through the die plate and a short distance below the same so that when the stamp descends upon the piece of sheet metal in the die the ejecting pin will be forced down below the surface of the die and will not have any effect upon the sheet metal, but as the plate moves around the lower end ofeach pin will engage the cam surface in the bottom of said groove and will raise one side of the article stamped thus preventing the article sticking to the perforating pin,and alsotilting up the forward side thereof so that the article will be engaged by the stripperk. This stripper consists of a piece of metal or other material having the base 8 at its lower end, and secured to the edge of the base plate and from thence extending upwardly at the outer edge of the die plate and then horizontally over the die plate with its lower edge in engagement with or very close to the upper face of the die plate. This stripper is located on the die plate immediately over the front portion of the cam in the bottom of the groove in the base plate and is inclined rearwardly and outwardly. Thus as the front edges of the stamped articles are tilted up by the ejector pins in the bottoms of the dies, the stripper will engage the same consecutively and throw them out of the dies and laterally off the die plate by reason of the inclination or angle of the stripper. It will thus be observed that the articles after being stamped are automatically thrown from the die and the plate laterally into a suitable receptacle which can be located beside the machine.

Suitable means are provided to automatically feed the sheet metal or tin blanks to the dies. This feeding device preferably consists of a vertical magazine 9, in the shape of a tube open at the ends and located immediately above the die plate so that the dies will consecutively register with the open bottom thereof just before they pass beneath the punch. This magazine is carried by a bracket 25, passing over the upper face of the die plate and at its inner end secured by the bolt on other in the magazine and as the die plate revolves the disks will drop one at a time into the dies, the lower end of the magazine be ing so located with respect to the upper surface of the die plate that only one disk at a time can drop into each die. The lower edge of the magazine is notched to permit passage of the pins in the dies.

Any suitable means can be provided to rotate the die plate step by step or otherwise so as to present a new die to the stamp every time the stamp descends to form its operation. I here show an operating machine adapted for use in connection with a foot power machine but of course this feed operating mechanism will have to be altered and moditied to operate the die plate in connection with steam, electric or other power machines,

and I do not wish to limit myself to any peculiar mechanism for rotating the die plate as desired. The upper portion of the outer edge of the die plate is preferably provided with ratchet teeth or notches 3, each tooth preferably equal in length to the distance between the dies, and the abrupt edge or shoulder of each tooth or notch is located opposite each die. An operating or ratchet ring 1 6, loosely surrounds the lower portion of the die plate and rests on the base plate so that the ring can have a limited turning movement. A spring pawl 17 is mounted on the upper edge of this ring and is adapted to engage the ratchet teeth of the die plate so as to rotate the die plate a tooth at a time or otherwise as desired. This ring is provided with a lateral lug 6, to which a short length link 7 is loosely pivoted. This short link is loosely pivotally connected to the upper arm of the bell crank lever h, by means of a link 9', extending along the table b, between the base plate and the upper extension of the frame a. The bell crank lever is suitably fulcrumcd on a depending bracket or pin secured to the under side of the frame a, so that the bell crank lever will rock in a vertical plane and its lower horizontal end will be located above the treadle to which it is loosely connected by links 11 and 12 as clearly shown. Thus it will be seen that when the treadle c, is depressed to force down the punch the bell crank lever is rocked so that its upper end moves toward the die plate thereby, through the medium of the links mentioned, swinging the ratchet ring around so that the pawl will move back into engagement with a new tooth. When the stamp has struck the blank on the die and ICC performed its work and starts on its upward movement, the treadle moves down thereby rocking the bell crank lever through the medium of the links, which moves the ring and the die plate around the length of one tooth. This operation presents a new die to the stamp and at the same time the die just previously under the stamp moves under the stripper and the stamped article is thrown therefrom and also a die moves under the magazine and receives a blank. It will .thus be seen that this operation is entirely automatic, the die plate presents a new die to the stamper, the stamped article is removed from the previous die, and a die is provided with a blank by one operatio n.

In order to hold the die plate in the proper position and to insure the proper position of the die immediately under the stamp the head f, is provided with a pin 13 tapered at the point and located immediately to one side of the stamp so that when the stamp descends the pin will enter a tapered hole 14c beside the die in operative position and will thereby hold the die plate in the proper position. These holes 1e are located between the dies at proper points and if desired can have their upper edges tapered or beveled substantially as shown so as to move the die plate in the proper position if it is not moved to that position by the ratchet movement. These die plates are interchangeable so that several sets of plates and stamps can be provided in order that different kind of articles can be stamped by the machine.

These machines are particularly adapted for stamping caps for bottle tops, covers and for many other purposes. The dies herein shown in the machine are particularly adapted for forming caps used in securing roofing.

It is evident that various changes might be made in the forms, constructions, arrangements and operation of the parts described without departing from the spirit and scope of myinvention. Hence I do not wish to limit myself to the construction herein set forth but consider myself entitled to all such changes as fall within the spirit and scopeof my invention.

Having thus fully described my invention, what I claim as'new, and desire to secure by Letters Patent of the United States, is-

1. In the stamping machine, the combination of a frame, a reciprocating punch and mechanism for operating the same, a rotary horizontal die plate on the frame below the punch provided with a circular series of dies on its upper face, a locking mechanism carried by and moved with the punch to hold the die plate in position as the punch descends, and die plate operating mechanism, substantially as described, controlled by the punch operating mechanism, substantially as described.

2. In a stamping machine, the combination of a frame, a punch and its operating mechanism, the rotary die plate connected with and rotated by said operating mechanism and having the series of dies in its upper face arranged to consecutively pass beneath the punch, a blank feeding mechanism arranged to feed a blank to each die before it reaches the punch, ejectors to raise the punched articles from the dies and a stripper extending across the dies arranged to throw the stamped articles from the die plate after being raised by said ejectors so as to engage the stripper, substantially as described.

3. In a stamping machine, the combination of a frame, a base plate having a circular groove therein having a portion of its bottom raised, the rotary die plate having the circular series of dies, each die provided with a movable pin projecting through the same into said groove so as to be forced outwardly by said raised portion, thepunch, and operating mechanism, substantially as described.

4:. In a stamping machine, the combination of a frame, a reciprocating punch, a rotary die plate having the circular series of dies, each die provided with a movable pin extending up into the same, means, substantially as described,to move said pins vertically, and operating mechanism for the punch and die plate, substantially as set forth.

5. A stamping machine having a rotary die plate provided with a series of dies each having an automatic ejector, and a stripper extending across the dies to engage the stamped articles when raised by said ejectors and throw the same from the dies and plate, substantially as set forth.

6. In a stamping machine, a die plate having a die provided with a vertically movable ejector pin located to one side of the center thereof, and means to force up said pin so as to raise one edge of the stamped article from the die, substantially as described.

7. In a stamping machine, the combination with the rotary die plate provided with a series of dies each provided with a central vertically movable spring perforating pin, and with an ejector pin, of a base for said die plate provided with means for operating said pins, substantially as set forth.

8. In combination, a frame, a punch and its operating mechanism, abase, a rotary die plate on said base beneath the punch having a series of dies and ratchet teeth or notches, a ring loosely surrounding said die plate hav ing a pawl to engage said ratchet teeth, and operating connections between said ring and said punch operating mechanism, substantially as described.

9. In a stamping machine, the combination of the frame, a reciprocating head provided with a punch, a rotary die plate having the series of dies, and a pin 0 tried by said head and arranged to engage said plate and lock the same as the punch descends, substantially as described.

10. In a stamping machine, the combination of a frame, a reciprocating punch, a treadle connected to operate said punch, a rotary die plate having a series of dies and ratchet notches, a loose ring surrounding said die plate and provided with a pawl to engage said teeth, and lever and link connections between said ring and said treadle to rotate the ring step by step, substantially as described.

11. In a stamping machine, a die plate provided with a series of dies on its face and flared or tapered sockets, and means, substantially as described, to move said plate step by step, in combination with the reciprocating punch and its operating means, and a rigid pin moving with and located to one side of the punch to entera socket and hold the die plate as the punch enters a die, substantially as described.

12. The rotary die plate, and its operating mechanism, a base on which said plate turns in combination with the stripper bar having inclined face and secured rigidly at one end to said base and extending upwardly therefrom and then laterally across the face of the die plate at an angle and engaging the face of the die plate so that its inclined edge will catch the stamped articles and lift them from the dies and sweep them from the die plate, substantially as described.

13. The combination with a die plate having a depressed die, a vertically movable punching pin in said die, of a reciprocating punch having a convexed face and provided with a central spring ejector pin arranged opposite said punching pin, as and for the purpose as described.

14. The combination of operating means, a punch, a rotary die plate having the series of dies therein, ejectors in said dies, a base for said die plate provided with means to operate said ejectors to lift the stamped articles in said dies, and means to strip the stamped article from the dies, substantially as described.

15. The rotary die plate having the dies, each provided with a central punching pin and with an ejector pin between the center and edge of the die, said pin projectingthrough the die plate, in combination with a base having a circular groove in which the ends of said pins project, the bottom of the groove on one side of the base being raised for the purpose mentioned.

In testimony that I claim the foregoing as my own I affix my signature in presence of two witnesses.

JOHN CASEY.

WVitnesses:

CHARLES W. CHASE, THEoPHtLUs N. WEEMS.

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