Method for stretch forming drop hammer parts utilizing stretch w

Details Method for stretch forming drop hammer parts utilizing stretch w Method for stretch forming drop hammer parts utilizing stretch w

1986-05-28

1987-10-13

Crane, Daniel C.

Metal deforming

By use of non-deforming work-gripping clamp and relatively...

By individually non-deforming clamps

72302, 72378, B21D 1102, B21D 2502

Patent

active

046989951

ABSTRACT:
Jaws (20) and (23) on a stretch former (10) hold a metal sheet while the tension cylinders (18) and (19) stretch the metal sheet into its "yield state." In one embodiment, a bulldozer platen (33) carries a female die (32) into and out of forming contact with the metal sheet wrapped over a male die (31) carried between jaws (20) and (23). Bulldozer cylinders (35), (36), (38), and (39) are mounted in lightly spaced-apart relation to provide access to the metal forming parts of former (10). In another embodiment, a cantilever mounted transverse bulldozer beam (40) carries a female die (32). Beam (40) includes a retractable cylinder rod (46) which assists in moving die (32) into forming engagement with die (31) and, between reciprocations, can be retracted to permit unobstructed access to the metal forming interior of the machine.

REFERENCES:
patent: 2961028 (1960-11-01), Bath
patent: 3034560 (1962-05-01), Matthews
patent: 3113607 (1963-12-01), Maize
patent: 3314269 (1967-04-01), MacKenzie

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