Positioning mechanism for machining

The utility model discloses a positioning mechanism for machining, and relates to the technical field of positioning mechanisms. The upper side of the base is provided with a plate body, the plate body is provided with an insertion opening in the transverse direction, a rotating disc is arranged in the plate body in a running fit mode, a plurality of clamping rods are arranged in an elastic sliding mode, one side of each clamping rod is provided with a rod body, the rotating disc is provided with an arc-shaped groove corresponding to the rod body in the transverse direction, the periphery of the rotating disc is provided with a gear ring, and the plate body is internally provided with a motor. The output end of the motor is provided with a gear corresponding to the gear ring. The arc-shaped grooves are matched with the rod bodies, the rotating disc is conveniently driven to rotate, meanwhile, the multiple clamping rods are driven to slide, the convenience of positioning and positioning relieving of the tubula