Device for confirming opening of welding gun

Details Device for confirming opening of welding gun Device for confirming opening of welding gun

1997-05-23

1999-04-20

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

B23K 1130

Patent

active

058955852

ABSTRACT:
A device for confirming an open state of a welding gun having a reciprocating mechanism or moving a movable electrode into and out of contact with a workpiece has a pin feeler mounted on an end of a cylinder of the reciprocating mechanism and movable into and out of contact with a piston movably disposed in the cylinder. The device also has a helical compression spring for resiliently biasing the pin feeler, a housing accommodating the biasing means, and a proximity switch fixedly mounted in the housing. When the piston moves in a direction to open the welding gun, the piston presses and moves the pin feeler until an end of the pin feeler is detected by the proximity switch to confirm the open state of the welding gun. The open state of the welding gun can be detected without being adversely affected by dust and dirt particles, grease, and a mist in the cylinder. The device can be assembled highly efficiently.

REFERENCES:
patent: 4207564 (1980-06-01), Isakson et al.
patent: 4861959 (1989-08-01), Cecil
patent: 4875009 (1989-10-01), Leveque
patent: 4970361 (1990-11-01), Fuse
patent: 4984171 (1991-01-01), Tsujii

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