Resistance welding of high strength steels

Details Resistance welding of high strength steels Resistance welding of high strength steels

2006-10-24

2006-10-24

Kerns, Kevin (Department: 1725)

Electric heating

Metal heating

For bonding with pressure

C219S118000

Reexamination Certificate

active

07126077

ABSTRACT:
The formation of spot welds in high strength steel workpieces is improved by using welding electrodes with annular, or donut shaped welding tips for the formation of the molten metal weld pool at the weld site. The annular poll solidifies to form an annular weld nugget. Preferably the donut shaped nugget has an internal diameter that is no more than three-quarters of the outside diameter. The method is applicable to carbon steel workpieces with allowing elements for strengthening, and to thick sheets of mild carbon steels.

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