For example, the purpose of the hammer head in the picture is different from that of the tail. The head is used to hammer other objects, so it is required to be hard and wear-resistant, but must not be cracked; the tail is used to pull out nails and the like. So the requirement cannot be broken. An induction heating furnace is used to heat and heat the head and tail of the hammer respectively to obtain different performance requirements. The head of the forging head is cylindrical, and the spiral induction coil can be used to heat the head to the quenching temperature. The tail of the hammer head has a special shape, so the inductor shown in Figure 12-99 is used for heating. The inductor is a one-turn coil connected to the intermediate frequency step-down transformer. 9 forging hammers can be placed in the induction coil at the same time, and the hammer head and tail can be quenched after being heated to the required temperature. Induction heating furnace before quenching Device, its power 100kW, current frequency 25 x10³Hz