HIGH-FREQUENCY INDUCTION HEATING DEVICE FOR PIN PART OF CRANK SHAFT AND HIGH-FREQUENCY INDUCTION HARDENING APPARATUS PROVIDED WITH THE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a high-frequency induction heating device for pin parts and a high-frequency induction hardening apparatus with which the rotating speed (number of revolutions per unit time) of the pin parts can be raised without developing flaw on the surface of the pin part of a crank shaft and further uniform high-frequency induction heating or cooling for hardening can be applied. SOLUTION: A high-frequency induction heating coil following-up mechanism 52 which shifts a high-frequency induction heating coil 4 independently separated from the pin parts 14 of the crank shaft 1 rotation-driven with a crank shaft rotation-driving mechanism 51, is arranged. Then, the high-frequency induction heating is applied to the pin parts 4 by using this following-up mechanism 52 while shifting the heating coil 4 so as to follow up the pin parts 14 in the state having a prescribed interval to the pin parts 14 of the crank shaft 1 rotated by centering the rotating axis X of the crank shaft 1 by synchronously linking with the rotation-driving of the crank shaft 1 with the crank shaft rotation-driving mechanism 51.