Workpiece positioner for arc welding and arc welding robot system having the positioner

摘要

A positioner (30) for arc welding having a few movable members and a simple structure, an arc welding robot system including the positioner and an arc welding robot (10), whereby the orientation of the workpiece corresponding to a welding site of the workpiece may be suitably changed by a minimum motion of the positioner. The positioner includes a pair of support members (32), a first member (36) having two ends supported by the pair of support members such that the first member is rotatable about a first axis (34) parallel to an installation surface of the positioner, a second member (42) having two ends supported by a pair of supporting portions (40) arranged on the first member such that the second member is rotatable about a second axis (38) perpendicular to the first axis, and a workpiece fixing part (44) for fixing the workpiece (100) to the second member.