| 摘要 |
PURPOSE:To obtain the apparatus for high-frequency induction heating a crank shaft, while controlling an output supplied from a high-frequency oscillator through a current transformer to a heating coil with an output balancer, by using as said heating coil an astraddle type provided at each of pin parts different in mass all over the entire circumferential surface of the rotation-angle phase of the crank shaft. CONSTITUTION:All of the pin parts P1... of a multi-cylinder crank shaft CR are high-frequency quenched at the same time by one high-frequency oscillator 1. For this purpose, a body to be induced having a configuration suited to controlling an output in response to the distribution of heat mass on the outer surfaces of the pin parts is stationarily provided at each of air cylinders, with respect to the output-controlling inductors B1... of output balancers B1... following the motion of heating coils C1... revolutionarily moving under a condition staddling the pin parts of the rotating crank shaft. Hence the apparatus for high-frequency quenching the crank shaft CR, which enables to uniformly quench the entire circumferential surfaces of the pin parts while reducing quench strain as shown in the pin part P4 of the fourth cylinder can be provided. |
