Projection for resistance welding of soft metals

Details Projection for resistance welding of soft metals Projection for resistance welding of soft metals

1981-10-13

1985-01-22

Envall, Jr., Roy N.

Electric heating

Metal heating

For bonding with pressure

219 861, B23K 1114

Patent

active

044953976

ABSTRACT:
A projection for use in electrical resistance welding of sheet metals and thin-wall parts, a method of fabricating such projection and the use of the same are disclosed. The flanks of the projection possess internally thereof an angle of about 40.degree. to 75.degree. and externally an angle of about 40.degree. to 100.degree., and the strength of the material at the region of the flanks is about 50% greater than the strength of the neighboring basic material. The method of forming the projection contemplates fabricating the same through plastic deformation of the basic material and the dimensionally exact shaping is accomplished by compression molding of the flowable metal between a punch and die of a tool.

REFERENCES:
patent: 3988562 (1976-10-01), Becker
S. A. Westgate and R. M. Rivett, Research Report, The Welding Institute, "Effect of Projection Design When Welding Single Projections in Aluminium Autobody Sheet", 3/1979.
American Society for Metals; Metals Handbook, vol. 6, Welding and Brazing; 1971; pp. 444-445.

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