How many process methods are there for high-frequency induction heating equipment quenching of crankshaft journal? What are the advantages?

For the induction hardening of the crankshaft journal, we usually use high-frequency induction heating equipment to achieve it. In this heat treatment process, there are three quenching methods:

One is that on the semi-automatic crankshaft quenching machine tool, the crankshaft shaft diameter is heated by an open and close sensor sleeve. When heating, the shaft does not rotate, and it is quenched with water. This method can not only mass production Quenching the crankshaft journal can also reduce labor intensity and reduce human resources. But the disadvantage is that the quenching is not uniform, so that the hardness of the shaft diameter surface is inconsistent.

The second is to use a semi-circular sensor. The crankshaft is heated by rotating motion on a semi-automatic or fully automatic quenching machine tool, and it is quenched and cooled by water spraying. This method not only meets the uniform temperature and hardness of the hardened zone of the shaft diameter, etc. According to requirements, the heating range of the crankshaft can also be expanded, and the fillet of the shaft diameter can also be quenched, so as to further improve the fatigue resistance of the crankshaft.

The third is to still use a semi-circular inductor, but the main coil and the secondary coil should be coupled and heated. This method greatly shortens the heating time and prolongs the service life of the induction heater.

To sum up, no matter what method is used, the high-frequency induction heating equipment can control the induction heating of the crankshaft journal, the quality of the shaft diameter after quenching is good, the pass rate is high, the heating efficiency is high, and it has obvious energy-saving effect. The heating speed is fast, the surface oxidation of the crankshaft is reduced or avoided, and the working efficiency is higher than that of the general heating device. It realizes accurate intelligent automatic control of the heated workpiece, purifies the air, improves and protects the working environment, and ensures the health and safety of the staff. The key point is that the components of the heating equipment are imported IGBT power devices, with power semiconductors as the core, no need to heat in advance, and the operation of opening and closing is simple and convenient. The entire quenching heating process will not produce open flames, which is highly safe. In short, it is a more advanced heating method.