Preheat time compensating weld control

Details Preheat time compensating weld control Preheat time compensating weld control

1985-11-18

1987-06-23

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

219 911, 219110, B23K 1124

Patent

active

046754946

ABSTRACT:
A spot weld controller includes a current transformer, a current amplitude detector, a keypad data entry, a solenoid, an air valve and pneumatic cylinder, welding electrodes, a connection to an electric power supply, a source of pressurized air, and programmed logic that controls the sequential operation of the equipment. The controller performs a weld cycle that includes a preheat period, during which inorganic material that bonds metal laminas together is heated and forced away from the electrodes, and a weld period, during which electric current at welding amplitude produces the weld after the metal lamina contact one another.

REFERENCES:
patent: 2021477 (1935-11-01), Bohn
patent: 2313941 (1943-03-01), Humphrey
patent: 2897444 (1959-07-01), Garscia et al.
patent: 3155809 (1964-11-01), Griswold
patent: 3418444 (1968-12-01), Ruehlemann
patent: 3538293 (1970-11-01), Procacino
patent: 3578940 (1971-05-01), Sands
patent: 3899653 (1975-08-01), Spinnato
patent: 4072843 (1978-02-01), Szabo
patent: 4329561 (1982-05-01), Schafer et al.
patent: 4456810 (1984-06-01), Schumacher et al.

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