Center hole positioning device for high-precision gear machining

The utility model discloses a center hole positioning device for high-precision gear machining, which comprises a support and a positioning and clamping part capable of clamping the side face and the end face of a workpiece, the positioning and clamping part is provided with an end face clamping part, the end face clamping part comprises a positioning block for supporting the workpiece and a fixing block fixed on the positioning block, and the end face clamping part is provided with a clamping part. A pressing block is arranged in the fixing block, the pressing block and the fixing block are connected through a first electric push rod, a supporting block is arranged at the bottom of the positioning block, the supporting block and the positioning block are connected through a first motor, and a side face clamping component is connected between the supporting block and the support through a second electric push rod and arranged on the upper end face of the positioning block. The side face clamping component com