Clamp for machining mechanical parts

The clamp for machining the mechanical parts comprises a sliding groove, the right side of the sliding groove is fixedly connected with a servo motor, the left side and the right side of the inner wall of the sliding groove are both connected with nut pairs in a penetrating and sliding mode, the output end of the servo motor is fixedly connected with a threaded rod, and the threaded rod and the nut pairs are connected in a penetrating and threaded mode. A second fixing block is arranged at the top of the nut pair, a first fixing block is fixedly connected to the middle of the top of the second fixing block, and second inserting blocks are fixedly connected to the left side of the top of the first fixing block on the left side and the right side of the top of the first fixing block on the right side. Compared with the prior art, before parts are machined, the clamp with the matched shape is selected, the second plug pin and the first plug pin are extracted, then the original clamp is taken down by sliding the