| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a high frequency induction heating coil and a high-frequency induction heating method, by means of which a cam top and a cam base are uniformly heated to obtain the constant depth of a quench-hardened layer, and excellent quenching quality without any overheated structure is obtained even without using any offset mechanism and a follow-up mechanism of the high frequency induction heating coil or a control circuit of them causing an increase in the cost of a heating apparatus. <P>SOLUTION: The high frequency induction heating coil 1 heats an outer circumferential surface of a camshaft 50 which is a metal component in which the distance from the center axis of rotation to the outer circumferential surface is not constant, and includes: one annular first heating conductor 2 having a slit 5 arranged at one part on the circumference so as to cut an annular body; second heating conductors 3a, 3b which are arranged in an outer circumferential area of the first heating conductor 2 and the ends of which are connected to the position other than a pair of ends 6 formed by the slit 5 in the outer circumferential part of the first heating conductor 2 across the slit 5; and a pair of power supply conductors 4a, 4b with one-side ends being connected to the second heating conductors 3a, 3b, and the other-side ends being connected to a high frequency power source 20. <P>COPYRIGHT: (C)2013,JPO&INPIT |
