Cutter structure

The invention relates to a cutter structure which comprises a cutter main body. A milling cutter portion is arranged on the cutter main body, a chamfering portion is formed on the peripheral edge at the front end of the milling cutter portion, and a thread cutter portion is formed on the cutter main body and located behind the milling cutter portion in a connected mode. Therefore, the chamfering portion in the front of the cutter main body is utilized for achieving an equidistant chamfering function through numerical control, then a numerically-controlled spiral curve equation is utilized for driving a cutter edge of the milling cutter portion to mill a bottom hole, and lastly, the thread cutting portion is used for carrying out a thread milling process continuously, so that forming operation of a threaded hole can be finished once. During implementation, working hours consumed for changing cutters cumbersomely in a machining process can be effectively reduced, errors generated due to recalibration when the c