Electric heating – Metal heating – By arc
Patent
1980-08-04
1982-08-31
Shaw, C. C.
Electric heating
Metal heating
By arc
219127, 219137R, 219161, B23K 912
Patent
active
043474268
ABSTRACT:
A method and apparatus for making a plurality of arc-spot welds in a predetermined pattern is disclosed. A plurality of welding torches are mounted upon a carriage which is longitudinally movable relative to a work piece. The work piece is supported by work piece supports which are vertically movable to allow exit of a completed work piece and insertion of a new work piece. A clamping assembly mounted above the work piece supports is movable toward the work piece to engage the work piece to hold it in place for welding, and is movable away from the work piece to allow exit of a completed work piece. The carriage is provided with a control which stops the carriage whereby the torches will be located at positions above the work piece corresponding to the desired pattern of arc-spot welds. The control preferably comprises a cam connected to the carriage which follows a track located on the frame which defines the welding pattern. Limit switches located on the cam or the track temporarily stop movement of the carriage and initiate arc-spot welding at desired positions on the pattern. Stop means are provided which engage when the pattern has been completed and initiate movement of the clamp assembly and work piece supports to allow the welded work piece to be moved out of the assembly. Wire feed reels and wire feed motors and drive rolls are mounted on the frame. Flexible conduits containing the weld wire move with the carriage and the torches. Arc burn back is provided to insure that the weld wire is free of the work piece after each arc-spot weld is completed.
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Coughlin Steve A.
Ware Don A.
Whatley Oscie B.
ACF Industries Incorporated
Cummings Henry W.
Shaw C. C.
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