Metal deforming – By use of non-deforming work-gripping clamp and relatively... – By individually non-deforming clamps
Patent
1997-04-15
1998-04-07
Crane, Daniel C.
Metal deforming
By use of non-deforming work-gripping clamp and relatively...
By individually non-deforming clamps
72 57, 72370, 72465, 294211, B21D 901
Patent
active
057351600
ABSTRACT:
A hollow metal body is shaped by a process including simultaneous stretching and bending. The body is stretched longitudinally by pulling end portions in opposite directions with sufficient force to exceed an elastic limit and to initiate elongation through plastic deformation. While the body is being stretched longitudinally, it is bent between its end portions transversely of the direction of pulling. Solid polymeric first and second mandrels are inserted into end portions of the body to prevent collapse during bending.
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Evert Robert P.
VanSumeren Thomas J.
Aluminum Company of America
Crane Daniel C.
Klepac Glenn E.
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