Ring forming method

Details Ring forming method Ring forming method

1994-12-15

1996-10-08

Crane, Daniel C.

Metal deforming

With cutting

By shearing tool-couple

72339, 723796, B21D 2802

Patent

active

055619991

ABSTRACT:
A method of forming corrugated rings of sheet metal which include the steps of: punching a circular area in the sheet material; punching a plurality of kidney-shaped areas concentrically spaced around the circular hole forming an annular area still connected to the sheet material; deforming the annual area between two mating dies having equal radius radial corrugations therein to corrugate the annual area and concentrically punching the corrugating annular area between a circular punch and a corresponding die, the punch and die having mating cutting surfaces which are corrugated and mate with the corrugated annual area of the sheet thereby forming a circular ring having radial corrugations.

REFERENCES:
patent: 155098 (1874-09-01), Merriken
patent: 1159322 (1915-11-01), Livingston
patent: 2219602 (1940-10-01), Rayner
patent: 2605730 (1952-08-01), Dennis
patent: 3460368 (1969-08-01), Brown
patent: 3748888 (1973-07-01), Gerich
patent: 4958430 (1990-09-01), Grieb

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