Method for forming hollow articles

Details Method for forming hollow articles Method for forming hollow articles

1991-09-18

1992-12-15

Crane, Daniel C.

Metal deforming

With cutting

By shearing tool-couple

72358, 470 25, 470 89, B21D 5324

Patent

active

051706555

ABSTRACT:
The method includes a step of compressing a portion of a cylindrical stock into a third section of a cavity of a die. The cavity of the die includes a first section having a polygonal internal surface, a second section being narrower than the first section and having a first circle in cross section with a diameter substantially equal to the diameter of the stock which is fed in the second section and a third section between the first and second section. The third section has a second circle in cross section with a diameter gradually decreasing from the first section towards the second section.

REFERENCES:
patent: 3247534 (1966-04-01), McClellan
patent: 3267500 (1966-08-01), McClellan

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