Process and apparatus for press forming

Details Process and apparatus for press forming Process and apparatus for press forming

1993-09-15

1995-05-23

Crane, Daniel C.

Metal deforming

With cutting

By shearing tool-couple

72339, 72404, 72442, B21D 2802, B21D 5304

Patent

active

054170974

ABSTRACT:
A process of press-forming a strip fed in its longitudinal direction to continuously produce press-formed articles with arbitrary lengths through forming stages including a draw-forming stage, the process comprising the steps of: a first step of continuously forming a semi-finished product having a middle portion formed over a length corresponding to that of a final product and an unformed leading end connected to an unformed following end of a neighboring antecedent semi-finished product, while feeding a strip in the direction of the strip length at a selected pitch; a second step of simultaneously draw-forming the unformed leading end of the semi-finished product and the unformed following end of the neighboring antecedent semi-finished product to a selected shape, the ends being connected to the respective semi-finished products; and a third step of separating scrap from peripheries of the leading end of the semi-finished product and the following end of the neighboring antecedent semi-finished product. An apparatus for carrying out the process is also disclosed.

REFERENCES:
patent: 1113442 (1914-10-01), Irvin
patent: 1302870 (1919-05-01), Spery
patent: 1657449 (1928-01-01), Amsden
patent: 1942353 (1934-01-01), Berger
patent: 1994428 (1935-03-01), Keil
patent: 2614515 (1952-10-01), Wheeler
patent: 4125080 (1978-11-01), Moller
patent: 5119666 (1992-06-01), Fujiwara
patent: 5271140 (1993-12-01), Futamura
Yasusada Yonemura, "Jitsurei Puresu Kako To Katasekkei No Kaizen", Nikkan Kogyo Shimbunsha, Feb. 28, 1969, pp. 1-4, 128 & 221.

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