Forming die for thin plate

Details Forming die for thin plate Forming die for thin plate

1993-06-25

1994-09-20

Crane, Daniel C.

Metal deforming

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

With interrelated clamp closer and tool mover

72452, B21D 504

Patent

active

053478380

ABSTRACT:
A method is disclosed of forming a thin plate having a negative angle-formed portion when a second die is moved straight to bump against a first die to form a work, when the first die is rotatably provided with a rotary cam having a negative angle forming portion, and the second die is equipped with a slide cam having a negative angle forming portion in its opposite position to said rotary cam, and the second die is so set to approach the first die, then the slide cam bumps against the rotary cam and moves to form a negative angle-forming portion between both cams, and after negative angle forming portions having been made, the second die withdraws from the first die and the rotary cam is made to rotate and retreat to the extent that the work can be taken out from the first die. In such a forming method, the negative angle forming portion of the bent work is divided into plural portions which are substantially straight within a range capable of processing with one rotary cam.

REFERENCES:
patent: 1183523 (1916-05-01), Bauroth
patent: 1408787 (1922-03-01), Weaver
patent: 1858047 (1932-05-01), Ireland

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