Electric heating – Metal heating – For bonding with pressure
Patent
1994-06-16
1995-12-05
Leung, Philip H.
Electric heating
Metal heating
For bonding with pressure
219 81, 219 82, 219 83, B23K 1106, B23K 1114
Patent
active
054731330
ABSTRACT:
Two pieces of steel strip are welded together by a method employing projection resistance welding. A portion of one strip is formed with a series of aligned projections and arranged in superimposed relation with a portion of the other strip. The superimposed portions are moved through a welding zone located between upper and lower electrodes, typically a pair of rotatable welding wheels, through which a continuous electrical current flows. As the projections move into and through the welding zone, they are heated, flattened, melted and welded to the other of the two superimposed portions. The projections may be in the form of a continuous, elongated ridge (when the steel strips are uncoated) or in the form of spaced apart dimples (when the steel strips are coated or uncoated).
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Makarov, et al., "Resistance Projection-Seam Welding of Low-Carbon Steel with Reduced-Pause Current Pulses on MSHP Machines," Svarochnoe Proizvodstvo, vol. 18, No. 11, p. 42 (Nov., 1971).
Williams, et al., "High Speed Resistance Seam Welding of Uncoated and Coated Steels," p. 71, British Steel Corporation (1988).
Inland Steel Company
Leung Philip H.
Pelham J.
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