Fixture for threaded sleeve machining

The device comprises a base, the top of the base is fixedly connected with an air cylinder, the air cylinder is sleeved with a sliding barrel, the output end of the air cylinder is fixedly connected to the inner top of the sliding barrel, and the outer surfaces of the upper end and the lower end of the sliding barrel are fixedly connected with a plurality of first installation bases in a surrounding mode. A plurality of sliding seats are arranged at the top of the machining clamp base, and the tops of the multiple sliding seats are fixedly connected with supporting plates used for clamping threaded sleeves. By arranging the sliding barrel, the air cylinder, the sliding seat, the supporting plate and other assemblies, the air cylinder is used for controlling the sliding barrel to ascend and descend, the connecting rod drives the sliding seat to slide on the base so as to control the supporting plate to conduct outward supporting and control the protection pad to abut against the inner side wall of the thread s