Electric heating – Metal heating – For bonding with pressure
Patent
1997-06-13
1999-09-21
Shaw, Clifford C.
Electric heating
Metal heating
For bonding with pressure
219 8519, 219 8651, 219 89, 219 911, B23K 300, B23K 1124
Patent
active
059549769
ABSTRACT:
A pressure regulator system for a pneumatically- or hydraulically-actuated weld head. The weld head includes a switching valve comprising several ports: an inflow port attached to a source of pressurized gas, preferably air; an exhaust port; a first line port; and a second line port. Two-way valves are provided on the first line port and the second line port. A valve sensor connected to a switch for determining weld force in the weld head is connected to means for simultaneously closing the first line port valve and the second line valve port when a desired weld force is attained between one or more electrodes and a workpiece, thereby maintaining a constant, maximum pressure in the cylinder and consequently maintaining the desired weld force between the electrode(s) and the workpiece during the welding operation.
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patent: 3553420 (1971-01-01), Shearer, Jr. et al.
patent: 3727822 (1973-04-01), Umbaugh
patent: 3925635 (1975-12-01), Schneider
patent: 4317980 (1982-03-01), Goodrich et al.
patent: 4733042 (1988-03-01), Nishiwaki et al.
patent: 5360958 (1994-11-01), Bogue et al.
Shaw Clifford C.
Unitek Miyachi Corporation
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