Lathe quick-change positioning clamp for small-hole thin-wall part

The utility model discloses a lathe quick-change positioning fixture for a small-hole thin-wall part, which comprises a main body, one end of the main body is fixedly mounted on a three-jaw chuck, a through hole is arranged in the main body, and a conical hole is arranged at one end of the through hole; a threaded hole is formed in the center of the fixing piece, and evenly-distributed connecting holes are formed in the fixing piece along the center of the fixing piece; and the outer surface of the pull rod is provided with an external thread matched with the threaded hole, one end of the pull rod is provided with a conical head, and the conical head is matched with the conical surface hole. According to the lathe quick-change positioning clamp for the small-hole thin-wall part, the clamping part on the main body is matched with the conical head on the pull rod, so that the small-hole thin-wall part can be quickly fixed, and the workpiece can be conveniently clamped; the clamp is simple in structure, can be d