System for attaching / detaching a workpiece to be machined on a jig

摘要

A workpiece changing system capable of automatically changing a heavy workpiece (10) using a robot (20). A jig (8) for attaching a workpiece thereto is mounted on a jig mounting device (1). The jig mounting device (1) comprises a jig mounting unit having a rotary member (6b) and an orientation changing member (6a). The rotary member (6b) rotates the jig (8) and the workpiece (10) on the jig (8) and holds them at a desired rotary position. The orientation changing member (6a) swings around an axis to tilt the jig (8) and the workpiece (10) on the jig (8) and hold them at a desired orientation. As the jig (8) and the workpiece (10) on the jig (8) can take a suitable orientation or posture for being handled by the handling robot (20), the handling robot (20) can hold a heavy workpiece (10) without exerting excessive load on the robot wrist (20b).