| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an apparatus for induction-hardening a crank shaft with which a plurality of journal parts or pin parts can simultaneously be hardened by using one set of high frequency transformer and a plurality of high frequency induction heating coils, a facility cost can be restrained to low and also, hardening man-hours can be reduced and a cycle time can be shortened. SOLUTION: A secondary conductor 23 having conductive first and second blocks 40, 42 and at least one of conductive third block 41 insulated from the first and the second blocks 40, 42, connected with an output electrode, respectively between the high frequency transformer (e.g. a thin type transformer 9) and the high frequency induction heating coils, are disposed. High frequency power is supplied to the plurality of the high frequency induction heating coils 7a, 7b from one set of the high frequency transformer by connecting the plurality of the high frequency induction heating coils (e.g. two pieces of high frequency induction heating coils 7a, 7b) with the secondary conductor 23, respectively.</p> |
