The camshaft is quenched and heat treated by quenching equipment. What is the sensor like?

There are two types of cam sensors: circular and profiling. Most of the engine cam sensors use a circular effective ring. In order to prevent the adjacent cams or journals from being tempered by the influence of the magnetic field, it is necessary to stride the magnetic conductor beam on the effective ring, which not only improves the efficiency of the inductor, but also prevents the magnetic field lines from scattering. The early cam inductors were equipped with magnetic conductor plates and short-circuit rings at both ends of the effective ring, which also had the shielding effect, but the loss was large, and now they have been eliminated.

The cam sensor is sometimes connected in series with double holes, mainly to utilize the power of the variable frequency power supply. Generally, the number of journals of the camshaft is small (such as 3), and the heating surface area is large, and the number of cams is large (such as 8) and the heating area is small. . Therefore, when a double-station camshaft quenching machine is used, the double-hole cam sensor and the single-hole journal sensor work alternately, which can be properly matched.

The camshaft journal sensor is generally a one-time heating with a liquid spray structure, and the journals of special sizes are also scanned and quenched. Brake cam sensor, because the hardened parts required by the workpiece are two arc surfaces, most modern brake cam sensors are designed as profiling structures. In order to prevent the temperature of the cam tip from being too high, some sensors are designed with a needle valve structure for the peach tip. When the cam is heated, a tiny quenching cooling medium is ejected from the needle valve hole to adjust the temperature.