Medium frequency heating equipment for heat treatment of taps

The tap is a special tool for machining internal threads manually or with a machine tool. Its working condition is to cut out part of the material from the workpiece, and its blade is subjected to large torsion and wear. The part has high hardness and good wear resistance, and at the same time has a certain degree of toughness and sufficient strength, and can smoothly remove chips. In order to prevent twisting during work, we need to heat the tap through intermediate frequency heating equipment.

During the heat treatment process of the tap, the material for making the tap should have good hardenability and high hardness. Therefore, in order to control the pitch diameter of the thread, a relatively mild heating medium should be used. It has been proved that for the thread diameter below 12mm High-quality carbon steel and alloy steel are heated by intermediate frequency heating equipment to meet their hardness and deformation requirements. For machine taps with larger diameters, the defect of low hardness after heat treatment often occurs. The reason is that the temperature is not strictly controlled during heating, and the clamping of large tools is too accumulated, which reduces the cooling rate and leads to secondary carbonization. a large amount of precipitation. The reasonable clamping method of the tap is to insert the blade downward along the milled groove into the special heating plate, so that the center of gravity of the tap moves down, which can reduce deformation.