Pressure welding with closed loop force control

Details Pressure welding with closed loop force control Pressure welding with closed loop force control

1991-07-31

1992-08-11

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

219 5621, 219 8632, 219109, 228 8, B23K 1124

Patent

active

051381273

ABSTRACT:
A parallel-gap welder applies a precisely controlled force to the weld head (40) by means of a solenoid (60) having a plunger (72) aligned with the axis of the welding electrodes (50,52). To precisely control the amount of force applied by the solenoid a load cell (80) is interposed between the weld head (40) and the solenoid plunger (72) to provide a feedback force signal (158) indicative of the force applied by the solenoid. The feedback force signal is used to control current through the solenoid coil (68) and thereby servo the applied force to a force command input. The solenoid plunger (72) and load cell (80) are axially aligned with the axis of the electrodes (50,52) and solenoid force is applied through a universal joint (76,78) connection to assure an in-line driving force on the electrodes.

REFERENCES:
patent: 3727822 (1973-04-01), Umbaugh
patent: 4697058 (1987-09-01), Mueller
patent: 4817848 (1989-04-01), Gabaldon

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