Method and apparatus for preventing tip sticking during welding operation
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United States of America Patent
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-
Oct 8, 1985
Grant Date -
N/A
app pub date -
Apr 12, 1983
filing date -
Apr 12, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method is provided for preventing tip sticking during the spot welding of workpieces including ultrasonic vibratory spot welding. The welding apparatus includes a welding tip and a complimentary anvil between which the workpieces to be welded may be inserted. The welding tip is adapted to introduce into and through the workpieces sufficient amounts of energy to effect a weld between the workpieces. Shim material is inserted between the welding tip and the workpieces and/or between the anvil and the workpieces, said shim material having a hardness greater than the hardness of the workpieces. After insertion of the shim material, welding energy is then introduced through the shim material and the workpieces and welds are effected therebetween. The shim material is then torn away and discarded. Apparatus for effecting this method is further provided.
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