Outer diameter finish turning clamp for thin-wall workpiece

The utility model relates to an outer diameter finish turning clamp for a thin-wall workpiece. The outer diameter finish turning clamp comprises a long mandrel (38), a left-handed tight sleeve (34), a semicircular soft rubber supporting ring (42), an aluminum supporting ring (33) and a right-handed tight sleeve (40). The semicircular soft rubber supporting rings (42) and the aluminum supporting rings (33) are alternately arranged on the long mandrel (38), the aluminum supporting rings (33) are sleeved with workpieces, and the left rotating sleeve (34) and the right rotating sleeve (40) are installed at the left end and the right end of the long mandrel (38) respectively and used for fixing the two ends of the workpieces. The machining precision of the large-diameter thin-wall precise steel cylinder part is guaranteed, and the problem that the part is scrapped due to deformation of the large-diameter thin-wall precise steel cylinder part is solved. The large-diameter thin-wall precise steel cylinder part with