Welding method for coated metal articles

Details Welding method for coated metal articles Welding method for coated metal articles

1991-02-28

1992-06-09

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

219 8621, 219108, B23K 1111, B23K 1116

Patent

active

051209241

ABSTRACT:
A method for spot welding metal articles having coatings on the surfaces thereof in which the coating on the outer surface of one of the articles is removed by heating the article as a resistance in an electric circuit. This is done using low amperage current. When the coating is removed, the current can flow freely between the electrodes at high current to effect a secure weld without sparking, distortion or boring of the articles.

REFERENCES:
patent: Re29762 (1978-09-01), Becker
patent: 3462577 (1969-08-01), Helms et al.
patent: 3510623 (1970-05-01), Wolgast
patent: 4419557 (1983-12-01), Gellatly
patent: 4908938 (1990-03-01), Thorwarth et al.

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