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.