Method of welding cylindrical bodies

Details Method of welding cylindrical bodies Method of welding cylindrical bodies

1998-05-19

2000-03-28

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

219 64, B23K 1124

Patent

active

060434481

ABSTRACT:
A method for welding using an on/off switching control. The switching control forms a wave cycle with a plurality of peaks. Within a half wave cycle (1/2f) of welding current f, the wave form takes the shape of an inclined straight line A rising to a predetermined current value S1, a pause in the current which causes a straight line B to extend from upper end of line A, a voltage drop as shown by straight line C, which is shown as a straight line from B to a predetermined current drop, a drop pause as shown by straight line D and at least another current rise and current pause extending from straight line D, wherein all the welding periods are of the same time duration so that welding nuggets are evenly formed.

REFERENCES:
patent: 4414455 (1983-11-01), Schneider et al.
patent: 4554430 (1985-11-01), Belamaric
patent: 4595326 (1986-06-01), Matsuno et al.
patent: 4654503 (1987-03-01), Tajiri
patent: 4721841 (1988-01-01), Pazzaglia et al.
patent: 4868364 (1989-09-01), Kawano et al.
patent: 5237147 (1993-08-01), Pazzaglia
patent: 5489757 (1996-02-01), Schuermann et al.

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