Perforating device for valve body mounting hole machining

The utility model relates to the technical field of valve machining equipment, in particular to a punching device for machining a valve body mounting hole, which comprises a machining platform, a positioning device and a punching device, the positioning device and the punching device are arranged on the machining platform, the positioning device comprises a rotating base, and a plurality of positioning pressing blocks which are annularly and uniformly distributed are arranged above the rotating base. A synchronous adjusting mechanism is arranged in the rotating base, the lower end of the positioning pressing block penetrates through a sliding groove formed in the end face of the rotating base and is connected with the adjusting end of the synchronous adjusting mechanism, an outer gear ring is arranged on the outer wall of the rotating base, an adjusting motor is arranged on the machining platform, and a straight gear meshed with the outer gear ring is arranged at the driving end of the adjusting motor. The pu