Method for single side welding of laminate steel

Details Method for single side welding of laminate steel Method for single side welding of laminate steel

2006-10-11

2010-11-16

Ralis, Stephen J (Department: 3742)

Electric heating

Metal heating

For bonding with pressure

C219S091200, C219S092000, C219S117100, C083S030000, C076S107100, C156S273900, C156S274400, C228S173100, C228S174000

Reexamination Certificate

active

07834292

ABSTRACT:
A method is provided for welding a laminated metal sheet to a workpiece. The laminated metal sheet includes an outer metal sheet and an inner metal sheet bonded together by a polymer material that impedes the flow of weld current. A punch is applied against the outer metal sheet and driven through the laminated metal sheet to create a hole and also create an annular metallic burr that bridges across the polymer material layer between the outer metal sheet and the inner metal sheet. A weld electrode is positioned against the outer metal sheet at the punched hole and weld current is conducted through the first annular metallic burr to create an electric resistance weld between the laminated metal and the workpiece.

REFERENCES:
patent: 2703997 (1955-03-01), Sowter
patent: 2974704 (1961-03-01), Rheingold et al.
patent: 3338199 (1967-08-01), Taylor
patent: 4650951 (1987-03-01), Koga et al.
patent: 4743146 (1988-05-01), Khmelnitsky et al.
patent: 58181487 (1983-10-01), None
patent: 59144585 (1984-08-01), None
patent: 01027784 (1989-01-01), None
Official English translation of Yokoi (JP 58181487 A); Oct. 1983.

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