Heat treatment device for internal cooling milling cutter machining

The heat treatment device comprises an outer box shell, a heat treatment box is movably sleeved with the outer box shell, a placing plate is fixedly installed on the inner wall of the heat treatment box, a milling cutter placing frame is fixedly installed on the top of the placing plate, and an adjusting groove is formed in one side of the outer surface of the outer box shell. An adjusting frame is fixedly installed in the middle of the outer surface of the outer box shell, a welding frame is welded to the top of the adjusting frame, and the top of the welding frame is welded to the outer surface of the outer box shell. According to the scheme, by means of mutual cooperation of the heat treatment box, the placing plate, the milling cutter placing frame and other structures, a large number of milling cutters can be placed into the milling cutter placing frame at the same time, then heat treatment is conducted through the heat treatment box, and the heat transfer effect can be improved during heat treatment thr