| 摘要 |
<p>An arrangement structure of guide chips for a high-frequency induction heating coil which can be relatively easily and inexpensively implemented, wherein the center of a journal portion or pin portion of a crankshaft can be correctly positioned and the journal or pin portion can be evenly heated by high-frequency induction heating to homogenize a hardening layer. A guide chip (21a) for a high-frequency induction heating coil on the upper side is fixedly attached to a side plate (7), while at least one of guide chips (21b, 21c) for a high-frequency induction heating coil on the right and left sides is so disposed as to be movable in the radial direction of a journal portion (2) or pin portion (4). The dimension between the guide chips (21b, 21c) for a high-frequency induction heating coil on the right and left sides is so set as to be smaller than the outer diameter of the journal portion (2) or pin portion (4) in a free state wherein none of the three guide chips (21a, 21b, 21c) for a high-frequency induction heating coil are in contact with the journal portion (2) or pin portion (4).</p> |
