US2018513A - Die press - Google Patents

Description

Oct 22,1935. G. A. DELF 2,018,513

DIE PRESS Filed Jay. 26, 1935 I 62-020: A. 05; F, 19 v w Patented Oct. 22, 1935 UNITED s'rrss PATENT OFFICE DIE PRESS Application January 26, 1933, Serial No. 653,744

4 Claims. 7 (Cl. 1231.5)

This invention relates generally to die presses, and particularly to an adjustable anvil construction for such machines.

In the ordinary die presses heretofore constructed a suitable anvil has been provided upon which the Work to be operated upon may be placed and positioned beneath a ram which may be mechanically driven. It has heretofore been the practice to resiliently mount either the ram or the anvil so that the parts may yield upon engagement with the work and particularly to prevent crushing of work which may be of larger dimensions than that to which the travel of the ram is limited. With such arrangements, however, it has been diilicult, if not impossible, with work, the parts of which are of varying dimensions, to obtain uniform finishes on parts of different sizes due principally to the fact that the pressure exerted by the device upon large parts was considerably greater than the pressure exerted upon similar parts of smaller dimensions. The present invention, however, contemplates a die press wherein the ram is moved with a uniform stroke, but wherein the anvil is readily adjustable over a comparatively wide range so as to adapt the machine to the particular dimensions of the work which may be presented to it.

The object of the present invention generally stated is to provide a die press capable of accurately finishing work of various sizes and capable of exerting the same pressure upon large and small pieces of work.

A further object of this invention is to provide an adjustable anvil for die press machines.

A more specific object of this invention is to provide an adjustable anvil so constructed and arranged as to apply high pressures without injury to the adjusting parts.

Other objects will become apparent to those skilled in the art when the following description is read in connection with the accompanying drawing, in which:

Figure l is a view in front elevation of a die press showing an anvil and adjusting parts thereof, partially in section;

Figure 2 is a sectional View taken along line 2 of Figure l and showing the adjusting parts for the anvil.

In accordance with the present invention a die press machine is provided wherein the ram or power movable member moves for a relatively short distance on its power stroke and for uniform distance regardless of the size of the work being operated upon. In accordance with the present invention an anvil is provided which is readily adjusted whereby the work to be operated upon may be brought into contact with the die to the pressure element before the ram is moved into pressure applying position. The present invention contemplates an anvil which is readily adjustable over ;:a comparatively wide range, but in which the parts are so arranged as to be able to withstand the stress of the pressing operation. Generally stated the adjustable 1o anvil of the present invention comprises a block. having a camming surface adapted to cooperate with another camming surface. When in normal position the two camming surfaces are maintained in slightly separated relation by suitable 15 yielding means. When, however, pressure is eX- erted upon the anvil, the surfaces move into contact and, since they are preferably roughened, mutually engage and thus present relative movement of the camming surfaces while pressure is applied. In the embodiment illustrated the camming member takes the form of a wedge, but it will be understood that any suitable arrangement may be provided.

Referring now particularly to Figure 1 the die press may be mounted upon a suitable table I having an upright frame 2. Upon the upper end of the frame 2 may be journalled a shaft 3 having a flywheel i and driven as through a belt 5 and pulley (5 from a suitable source of power I. Mounted intermediate the ends of shaft 3 may be a cam 8 having a relatively short shallow recess 9 while the major portion of the periphery is of uniform diameter. Also mounted upon frame 2 and disposed directly beneath cam 8 is a ram H mounted for up and down movement in trunnions I2. At the upper end of ram it is a follower l3 adapted. to cooperate with cam 8. Suitable springs may be provided for pressing the follower I3 against the surface of cam 8. Mounted upon the lower end of ram it may be a pressure die M which may be, if desired, heated as by means of an electrical coil.

Disposed directly beneath the ram ll is a collar l5 suitably secured to table I. The collar i5 has a central opening I 6 adapted to receive an anvil block H which may be in the form of a cylinder. As is clearly shown in Figure 1 the lower end of anvil block I! is inclined as at [8 and provided with a series of teeth l9 running crosswise.

The collar is also provided with a laterally extending opening 2t adapted to receive a wedge 2| for cooperation with the lower face of block [1. Wedge 2| is provided on its upper surface with a series of teeth 22 corresponding to and adapted to cooperate with, teeth IS on the lower surface of block H. The Wedge 2| is adapted to slide back and forth relative to block so as to raise 22 of wedge 2| since when the teeth are in engagement it is difficult, if not impossible, to relatively adjust the members without lifting the block. In accordance with the present invention, however, and particularly since teeth l9 and 22 are preferably so shaped that when in engagement relative movement of the block and wedge is prevented, a suitable yielding means is provided for normally maintainingthe teeth out of engagement. In order to accomplish this one or 7 more pins, such as Ed, may be mounted in recesses in block having the lower ends thereof extending outwardly therebeyond and into a groove 25 in the upper surface of wedge 2|, as

clearly shown in Figure 2. Against the heads of pins 25 may be seated coil springsysuch as 26, the other ends of which may seat against suitable abutments which may be in the form of screw plugs 21. With an arrangement of this sort it is apparent that springs 26 normally maintain. the ends of pins 24 projecting beyond the teeth I9 to an extent sufiicient to engage the bottomof groove 25 and maintain teeth l9 out of engagement with teeth 22. 'When, however, pressure is applied to work seated upon the upper surface of block then it is apparent that i springs 25 yield, pins 24 retract and teeth I9 engage teeth 22. If desired, wedge 24 may be cushioned as illustrated. This may be accomplished by. the provision of suitably arranged springs or blocks of rubber. As illustrated in the drawing this is accomplished by a rubber block 28 secured to table I. Interposed between the. block 28 and the lower surface of wedge 2| may be a plurality of thrust members-such as 29, slidably extending through the base of collar and through table I so as to resiliently support wedge 2|.

The adjustable anvil construction just described is particularly adaptable for die presses wherein the driving shaft is automatically arranged to take, for instance, one complete revolution upon each actuation of the clutch Ac- 55 cordingly it will be understood that operation of the machine may be initiated by actuation of clutch pedal 38. This starts the machine and operation continues until cam 8 has made one complete revolution whereupon the machine illustrated automatically stops. If it is desired, however, to employ the adjustable anvil of the present invention with a machine of a different character, this may, of course, be readily accomplished.

In the operation of the machine just described taking, for instance, for the purpose of illustration the use'of .such machine in molding the heel seats of shoes while on a last, such as shown at 3|; the last 3| having thereon a lasted and bottomed shoe may be placed upon the upper surface of block l1 and wedge 2| moved toward the left until the surface of the shoe sole to be operated upon is firmly pressed against the operating surface of die I4. This, of course, is

accomplished by the lever, not shown, through linkage 23 to adjust the position of wedge 2|.

With the parts thus arranged and the shoe sole thus in the engagement with die |4, clutch pedal 30 may be actuated to start the machinery. Upon initial movement of the cam 8ram II is forced downwardly a distance corresponding to the difference in diameter between recess 9 and the remainder of the periphery thereof. Or-

dinarily this stroke of the ram-slightly exceeds 10 the lost motion which will betaken up upon. yielding of springs 26 to permit teeth |9-to engagewith teeth 22. When the teeth are forced into engagement there is provided a firm .and

solid construction against which the pressure of ram may be exerted. After cam 8 has made one complete revolution and the follower 3 is again seated in the recess of cam 8 the lasted shoe may be removed from block I! and a new shoe inserted into position. The same procedure is then repeated, the position of the block 7 being adjusted in each instance so as to press the surface to be operated upon into firm contact with the die before the machine is set into operation.

and the use of such individual features and subcombinations of features as do not depart from the spirit of this invention, although not specifically described herein, are contemplated by and within the scope of the appended claims.

Having thus described the invention, what is claimed is: I

1. The combination with a die press of an anvil comprising an adjustable block, a wedge supporting said block and movable to adjust the same, and resilient means between said block and said wedge and yieldable to permit the wedge and block to contact.

2. The combination with a die press of an anvil comprising an adjustable block, a wedge engaging the lower end of said block, the cooperating faces of said block and wedge being roughened, and yieldable means for normally maintaining said roughened faces out of engagement.

3. The combination with a die press of an anvil 5 comprising an adjustable block, a wedge engaging the lower end of said block, the cooperating faces of said block and wedge being roughened, and yieldable means carried by said block and cooperating with a smooth track on said wedge to v normally maintain the roughened faces out of engagement.

4. The combination with a die press having a head movable with a uniform stroke, of an anvil disposed beneath said head and adjustable relative thereto, cooperating toothed camming members relatively movable to adjust said anvil toward and away from said head, and means for normally maintaining said toothed surfaces out of engagement but yieldable to permit engage- 7O ment thereof upon the application of pressure to said anvil.

V GEORGE A. DELF.

It is to be understood 3.0

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