Electric heating – Metal heating – For bonding with pressure
Patent
1986-09-08
1988-05-17
Shaw, Clifford C.
Electric heating
Metal heating
For bonding with pressure
219114, B23K 1124
Patent
active
047452552
ABSTRACT:
A method and arrangement are described for regulating the welding operation in a resistance welding machine by sensing the welding current and controlling the welding time. A first integrator (20) determines the desired total energy to be supplied to a welding spot from a desired welding current preset by means of a function generator (18) and a preset welding time. An integrating device (25) connected to the welding-current sensor (14) determines the actual energy supplied. A comparator (24) compares the desired total energy with the actual energy in order to switch off the welding current by means of a start/stop module (30) in the event of equality between desired value and actual value. In this manner, fluctuations in the supply voltage are compensated by lengthening or shortening the time during which energy is supplied to the welding spot in order to ensure the quality of the welding from one welding spot to another.
REFERENCES:
patent: 3194939 (1965-07-01), Hill
patent: 3335258 (1967-08-01), Barnhart et al.
patent: 4343980 (1982-08-01), Stanna et al.
patent: 4516008 (1985-05-01), Jones
Elpatronic AG
Shaw Clifford C.
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