Projection welding of an aluminum sheet
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United States of America Patent
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Aug 28, 2001
Grant Date -
N/A
app pub date -
Jun 28, 1999
filing date -
Jun 28, 1999
priority date (Note) -
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Abstract
A projection coined onto a metal sheet, preferably an aluminum sheet, for projection welding the sheet to an adjacent metal sheet. The projection has a thickness greater than the thickness of the sheet on which it is formed. The wall of the projection surrounds a first recess and a second recess is formed in a side of the sheet opposite the projection from which the metal cold flows to form the projection. A welding gun assembly having an improved low interia, fast response to the collapse of the projection welding the sheet having the projection to the adjacent sheet.
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