Preweld test method

Details Preweld test method Preweld test method

1988-07-25

1989-10-24

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

2191171, 437 2, B23K 1124

Patent

active

048764302

ABSTRACT:
A method for welding together the broad faces of two conductive sheets increases the reliability and consistency from weld to weld. The sheets are accessible from only one side for parallel electrical resistance welding. The electrical resistance between one sheet and the other is measured and taken as an indication of the amount of dirt or corrosion in the interface between the sheets. The measured resistance is compared with a predetermined standard. If the resistance exceeds the standard, the faces are cleaned. If the resistance is below the standard, electrical power is applied to fuse the sheets together.

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patent: 3590372 (1971-06-01), DeSantis et al.
patent: 3735254 (1973-05-01), Severin
patent: 3837924 (1974-09-01), Baron
patent: 3849880 (1974-11-01), Haynos
patent: 4176313 (1979-11-01), Wrinn
patent: 4178543 (1979-12-01), Wrinn et al.
patent: 4179652 (1979-12-01), Davis
patent: 4218650 (1980-08-01), Matzen

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