Deep-drawn stamping process including side piercing

Details Deep-drawn stamping process including side piercing Deep-drawn stamping process including side piercing

1997-02-19

1998-06-09

Crane, Daniel C.

Metal deforming

With cutting

By composite tool

72334, 72335, 72348, B21D 2810, B21D 2416

Patent

active

057619492

ABSTRACT:
A method for forming a deep-drawn, one-piece, double-walled, cylindrical ring having tabs extending inwardly from the inner wall. The inner wall is formed and pierced to form the tabs. The outer wall is subsequently formed, or completed, to cover the tabs extending from the inner wall. In a preferred embodiment, the tab is formed with a bend by working the inner wall both outwardly and inwardly.

REFERENCES:
patent: 1040567 (1912-10-01), Newell
patent: 1672694 (1928-06-01), Shrum
patent: 2324468 (1943-07-01), Brickman
patent: 2460721 (1949-02-01), Thompson
patent: 4395811 (1983-08-01), Fryet
patent: 4552005 (1985-11-01), Matsushita
patent: 4621512 (1986-11-01), Tachikawa
patent: 4669295 (1987-06-01), Koitabashi

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