Method of production of a part formed with an opening

Details Method of production of a part formed with an opening Method of production of a part formed with an opening

1985-07-15

1986-04-22

Crane, Daniel C.

Metal fusion bonding

Process

With shaping

228152, 2281736, 72167, 72168, 72366, 72379, 219 9123, B21D 1108, B21D 5316, B23K 1110

Patent

active

045836752

ABSTRACT:
A method of production of a part formed with an opening wherein a metal strip material is subjected to rolling at its outer peripheral portion to have its thickness slightly reduced and shape the metal strip material into a ring-shaped blank, and at least one of inner and outer peripheral portions of the ring-shaped blank is drawn by a press to form at least one flange. The metal strip is supported in coil form on an uncoiler and payed out therefrom and subjected to a straightening before being subjected to rolling. When the metal strip material is rolled, its inner side is wrinkled. The ring-shaped blank is cut and a projection is formed at one end portion and superposed on the other end portion to be joined by electric spot welding to provide a completed ring-shaped blank. When the blank is drawn to form the flanges, by virtue of the wrinkles and thinned outer peripheral portion, the thickness of the part becomes substantially uniform.

REFERENCES:
patent: 1032718 (1912-07-01), White
patent: 1158294 (1915-10-01), Robinson
patent: 1887342 (1932-11-01), Vickerman
patent: 2365882 (1944-12-01), Kane
patent: 3266280 (1966-08-01), Wiig
patent: 3461702 (1969-08-01), Wallace et al.
patent: 3704616 (1972-12-01), Taira
patent: 3921432 (1975-11-01), Rivers

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