Clamp for machining

The utility model relates to a fixture for machining, which comprises a base and a turntable, a clamping mechanism is mounted on the turntable, a support mechanism and a push rod are mounted on the base, the support mechanism comprises at least three support units, and each support unit comprises a bottom block, a mounting block, a connecting rod, a strut, a support block and a roller. A movable block, a push plate and a spring are sequentially mounted in the mounting block, one end of a connecting rod is fixedly connected with the movable block, the other end of the connecting rod is fixed to a supporting block, and a roller is connected with the supporting block. According to the utility model, the structure can be freely changed according to requirements, the device can be used as a clamp and also can be used as a cart, workpieces can be directly transferred without taking down the workpieces after machining is finished, and the workpieces can be fixed through the clamp when being used as the cart, so that