US2172701A

US2172701A - Shaping

Info

Publication number: US2172701A
Authority: US
Publication date: 1939-09-12
Anticipated expiration: 1956-09-12

Description

Sept. 12, 1939. T. PfEUSTEGE 2,172,701

SHAPING. STAMPING, AND THE LIKE PRESS Filed Feb. 20, 19s? THOMAS E E us TEGEI) Patented Sept. 12, 1939 UNITED STATES PAT N OFF SHAPING, STAMPING, AND THE LIKE PRESS Application February 20, 1-937, Serial No. 126,759 In Australia July v14, 1936 Claims.

The invention relates to presses adapted for shaping, stamping, forging, or similar operations on various kinds of materials such as hot or cold metal, sheet metal, plastics, and like, and ithas '5 been devised to simplify constructional features of such presses, to obtain maximum efiiciency from the driving means at all stages of the working stroke, and to provide efficient controlling means for all movements of the working tool.

In the accompanying drawing, which illustrates one form of the invention,

Fig. 1 is a part sectional front elevation of a press;

Fig. 2 is an enlarged perspective view of a thrusting block and rollers;

Fig. 3 is a part sectional front elevation of the upper end of the controlling means;

Fig. 4 is a front perspective view of manual controlling means;

Figs. 5, 6 and '7 are side views on reduced scale of peripheries of thrusting blocks.

'Fig. 8 is a section on the line 8-.8,--Fig. 1.

A strong, rigid metal frame of the press, suitably reinforced and stayed where desirable, includes uprights II] secured to a base and work table I l, the latter being fitted with a work holder l2 of any desired form. The uprights H] are secured at their upper end to, and support, a

' transverse member I3. The uprights between :30 this member and the base are of substantially uniform size in cross section, and they constitute guides on which certain parts of the press slide.

A stub shaft l4, carried by the member l3 and drivable from a power source in any suitable manner, has a fly wheel I5 and a bevel gear [6 fixed thereon. A crown wheel H, in mesh with the gear I6, is fast to a vertical shaft l8 journaled in .the cross member I3.

The lower portion of the shaft I8 has spaced annular abutments l8 and 28. A thrusting block 2! is journaled on this part of the shaft. It is provided to give reciprocating movement to certain parts of the press while it is locked on the shaft IS. The block includes a hub 22, which inside and between its ends has an annular ring 23 disposed between the abutments l9 and 20. The block thus is journaled on the shaft and held against axial movement thereon by the abutments. The block is formed on its diametral faces with cam faced axially projecting

runways

24 and 25. The upper end of the hub is formed with notches or abutments 26 for engagement by a dog 21, which is slidable longitudinally in a slot 28 of the shaft l8 and extends laterally therefrom. The dog is mounted on the lower end of a rod 29, which is disposed centrally in a bore of the shaft and extends above the upper end thereof.

Oppositely disposed sleeves 30 are slidable on the frame uprights ill, and they are connected .6 near their bottom by a cross member 3|, the sleeves and cross member being parts of the upper portion of the working head of the press. The sleeves carry upper axles 32 on which are rollers 33 in contact with the upper runway 2d of the 10 thrusting block, and lower axles'34 on which are rollers 35 in contact with lower runway 25 of the thrusting block.

A metal plate 36 is interposed between the lower end of the thrusting block hub' 22 and the cross 5 member 3!, the plate being centered by a pin 3? thereof disposed in a hole of the cross member. The plate is urged against the end 'of the hub by springs 33 seated in recesses in the cross member, and tension of the springs is adjustable by thread- 20 ed bolts 39.

oppositely disposed sleeves 40 carry a cross member as the lower part of the working head that constitutes the tool holder, set screws 52 being shown as example of suitable means for 25 holding a tool to work opposite the workholder I 2.

The upper and lower parts of the working head are connected by a threaded stem 43 turnable in the cross members 3! and 4!. The stem is turnable to adjust the distance between the two parts .30 of the working head, and it is locked by nuts 44.

A platform 45 on top of the press carries uprights 46 supporting a cross member A! at the top. The rod 29, which carries the dog 21, extends upwardly through the platform db and cross .35 member 4! and is guided thereby. A collar 48 is held on the rod between nuts 49. A spring 50 between the platform and the collar urges the rod upwardly and normally keeps the dog 2! out of engagement with the notches 26 of the 40 thrust block.

Cross arms 51 on the collar 48 are connected by links 52 to side bars 53 at median points thereof. The side bars are pivoted at Ed on the rear of the platform 45, and at the front they are 45 connected with swingable rods 55 that are connected with hand levers 56, the latter being pivoted to any suitable fixed part as at 5?.

The

runways

24 and 25 of the thrusting block may be of formation of their cam surfaces to 50 produce the desired motions of the working head. For example, the upper and lower runways illustrated in Fig. 5 are designed to effect uniform travel in upward and downward direction of the tool holder; as seen in Fig. 6, the upper runway 55 either direction.

is designed to effect uniform travel in upward direction and the lower runway to effect nonuniform travel in the downward direction; and, as seen in Fig. 7, the runways are designed to efiect non-uniform travel in both upward and downward directions.

The stub shaft l4, gear l6, crown wheel l1, and shaft l8 are in continuous motion while the press is ready for operation, the spring normally holds the dog 21 in its upper and normal position, and the thrusting block 2| is at rest. When the working head is to be reciprocated, the operator, by swinging the hand levers 56, causes the dog 21 to descend to engagement with the notches 26 of the thrusting block. The block rotates with the shaft l8 and reciprocates the working head as long as the dog is held down. When the operator releases the hand levers, the spring 50 withdraws the dog from the block.

The spring urged plate 36, which bears against the thrusting bloc-k hub, acts as a brake to prevent rotation of that block while idle without interfering with rotation of shaft I8. Without such deterrent, the block might be rotated merely by friction of its bearing on the shaft I8. In order that there may not be too much drag of the plate on the hub, the springs 38 may be adjusted by turning the bolts 39.

The maximum efficiency of the pressure stroke is applied for effective work from the beginning of each downward stroke of the holder at all stages until the withdrawal movement of the holder.

The construction of the press is such that the thrusting block is rotated in a fixed plane and does not travel longitudinally over the shaft l8 in The block is rotated in one direction only and effects reciprocating straight line movement of the, working head in a plane parallel to the longitudinal axis of the thrusting member.

At the end of any downward working stroke the operator may retain the tool in contact with the work by removing one or both hands from the levers 56.

I claim:

1. In a press of the class described, a shaft, drive means for said shaft, a dog axially movable in said shaft, a thrusting block normally loose on said shaft having peripheral cam faced runways and also having notches at one end to engage said dog, means to shift said dog into engagement with said notches, and a working head reciprocable by said runways.

2. In a press of the class described, a shaft, drive means for said shaft, a dog axially movable in said shaft and projecting laterally therefrom,

a thrusting block normally loose on said shaft having peripheral cam faced runways and also .having notches at one end to engage said dog,

said runways.

4. In a press of the class described, a shaft, drive means for said shaft, a thrusting block normally loose on said shaft having peripheral cam faced runways, a clutch to lock said block to said shaft, means for controlling said clutch, a working head reciprocable by said runways, and a brake element on said working head spring urged against said block.

5. In a press of the class described, a shaft, drive means for said shaft, a dog axially movable in said shaft, a thrusting block normally loose on said shaft having peripheral cam faced runways and also having notches at one end to engage said dog, means to shift said dog into engagement with said notches, a working head reciprocable by said runways, and a brake element on said working head spring urged against said block.

THOMAS PETER EUS'IEGE.