Method and apparatus for projection welding

Details Method and apparatus for projection welding Method and apparatus for projection welding

1986-10-21

1987-10-13

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

219 95, B23K 922

Patent

active

047000414

ABSTRACT:
Two metal plates 1a, 1b are projection welded together using a truncated conical projection 12 on a first one of the plates having a spherical end surface. The plates are pressed together through the projection, and a welding current pulse is applied which reaches a maximum value in less than 2 milli-seconds. The shape and dimensional limitations of the projection coupled with the high amplitude, short duration current spike result in a thin welding nugget 9 and prevent any thermal distortion of the outer plate surface due to localized overheating.

REFERENCES:
patent: 3364564 (1968-01-01), Kurtz et al.
patent: 4115682 (1978-09-01), Kavesh et al.
Union Carbide Catalog Excerpts for "Ultrapulse Welding Machine Model 2030/2", 12/1980.

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