Electric heating – Metal heating – For bonding with pressure
Patent
1990-02-20
1992-03-17
Evans, Geoffrey S.
Electric heating
Metal heating
For bonding with pressure
219 869, 219158, B23K 1110, B23K 3704
Patent
active
050971093
ABSTRACT:
A spot welding fixture for holding worpieces in correct orientation has a water cooled aluminum body processed to have an aluminum oxide coating. The coating electrically insulates the body but provides good thermal conductivity so that a fixed electrode on the fixture body can be cooled by the body but no electrical shorts occur. Locating elements on the fixture are likewise insulated to prevent weld current from straying from intended paths. The coating is formed by immersing the aluminum body in sulfuric acid at 23 degrees Fahrenheit after all features have been machined into the body.
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Evans Geoffrey S.
General Motors Corporation
Meland C. R.
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