High-precision positioning clamp for turning of fixing and sealing device

The utility model relates to the technical field of fixing and sealing device machining, in particular to a high-precision positioning clamp for turning of a fixing and sealing device. According to the technical scheme, the clamping device comprises a chuck, a clamping jaw is arranged on the chuck and used for positioning a cap pressing blank, a groove is formed in the positioning side of the clamping jaw, a connecting plate is arranged in the groove, and fixing blocks are fixedly arranged at the two ends of the side face, opposite to the cap pressing blank, of the connecting plate respectively. The opposite sides of the two fixing blocks are connected with abutting blocks through elastic assemblies correspondingly, and the vertical faces of the extrusion sides of the two abutting blocks make contact with a cap pressing blank. The pressing cap blank positioning device has the advantages of positioning the pressing cap blank in the horizontal direction, positioning the pressing cap blank in cooperation with th