Two-edge special end milling cutter for through groove

The invention discloses a two-edge special end milling cutter for a through groove, which comprises a cutter handle and a cutter body. The cutter body consists of a spiral groove, a side edge, an end surface cutting edge and a chip discharge groove. The two-edge special end milling cutter is characterized in that the end surface cutting edge is arranged at the top end of the cutter body and the inclination angle lambda s is equal to 3-8 degrees; and the chip discharge groove is arranged on the spiral groove adjacent to the central part of the end surface cutting edge, the front angle gamma 1 of the internal side of the end surface cutting edge is equal to 0-10 degrees, the front angle gamma 2 of the external side of the end surface cutting edge is equal to 30 degrees, the rear angle alpha 0 of the end surface cutting edge is equal to 12-15 degrees and the spiral angle beta of the spiral groove is equal to 30 degrees. The end milling cutter has the advantages that the cutting edge is sharp, the chips are discharged smoothly, the processing efficiency is high, the problems that the groove bottom quality is poor and the cutter is apt to be broken when the common two-edge end milling cutter is used for milling through grooves are solved, and the end milling cutter is suitable for processing all kinds of through grooves.