Patent ID: 8487214
Filing Date: 2013-07-16
Classification: B23K

Abstract:
1. A welding carriage for supporting at least one welding machine relative to a workpiece having substantially linear first and second lateral sides and a joint to be welded, the welding carriage comprising: a first lateral support having at least one first wheel assembly; a second lateral support having at least one second wheel assembly; a four-bar leading parallelogram linkage and a four-bar trailing parallelogram linkage, each of the leading and trailing parallelogram linkages comprising an actuator connected between the common fulcrum point and the common actuation point for driving the first and second parallelogram linkages together and apart for adjusting a lateral spacing between the first and second lateral supports, wherein the leading parallelogram linkage and the trailing parallelogram linkage form a frame for supporting the at least one welding machine; and the at least one first and the at least second wheel assemblies support the frame for movement upon the workpiece and guide the frame relative to the first and second lateral sides and along a path substantially parallel to the first and second lateral sides.