Precise micropore cold machining device for copper pipe contact tube

The utility model discloses a precise micropore cold machining device for a copper pipe contact tube, and relates to the technical field of contact tubes. The drilling device comprises a base, a water tank, a clamping turntable, a stepping motor and a drilling machine, the water tank is mounted above the base through a plurality of fixed supporting rods; the stepping motor is mounted on the lower end face of the water tank; an output shaft of the stepping motor penetrates into the water tank from the lower part of the water tank and is connected with the clamping turntable; the output shaft of the stepping motor is in sealed running fit with the bottom of the water tank; the clamping turntable is fixedly connected with an output shaft of the stepping motor through a bolt; a support frame is mounted on the base on one side of the water tank; the drilling machine is vertically installed on the supporting frame through an electric lead screw sliding block mechanism, and a drill bit of the drilling machine extend