Auxiliary device of high-precision deep hole drill

The utility model discloses an auxiliary device for a high-precision deep hole drill, and belongs to the technical field of deep hole drills. Comprising a device body, the device body comprises a mounting base, a drill chuck, a drill bit and an auxiliary device, a rotating shaft is arranged in the mounting base, the auxiliary device comprises a U-shaped base, a sliding frame, a spring and a sleeve, a sliding groove is formed in the U-shaped base, limiting grooves are symmetrically formed in the two side walls of the sliding groove, a limiting block is arranged on the sliding frame, and a chip groove is formed in the drill bit. The auxiliary device of the high-precision deep hole drill comprises a drill bit, a sliding frame and a sleeve, the drill bit is arranged in the sliding frame, a chip groove is formed in the outer side face of the drill bit in a spiral mode, a liquid adding hole is formed in the side face of the bottom of the sliding frame, and a supporting rod is fixed between the sleeve and the slidin