External thread motor-assisted automatic tapping device

The utility model relates to an external thread motor-assisted automatic tapping device, and belongs to the technical field of machining equipment. The utility model discloses an external thread motor-assisted automatic tapping device. The tapping machine comprises a bottom plate, a clamping device, a tapping device, a motor support, a gear servo motor, a coupler, a long hexagonal sliding block, acircular die and a control switch. A clamping device, a tapping device and a motor support are sequentially arranged on the surface of the bottom plate. A speed reduction servo motor is mounted on the motor support; an output shaft of the speed reduction servo motor is connected with one end of a long hexagonal slider through a coupler; the other end of the long hexagonal sliding block is installed on the inner wall of the tapping device, a circular die is arranged at the end, located in the tapping device, of the long hexagonal sliding block, a circular bar hole is formed between the circular die and the long hexago