| 摘要 |
The present invention relates to a continuous heat treatment method for a rod including: a high frequency heat treatment step (a) for performing, by using high frequency, heat treatment on a rod moved by a conveyor or a roller; an external diameter dimension correction step (b), when the external diameter is out of an allowable error range by measuring the external diameter while rotating the rod passing through the high frequency heat treatment step, for forming the portion which is out of the allowable error range to be in the allowable error range by pressuring the portion with a press; a tempering step (c) for tempering the rod passing through the external diameter dimension correction step by accommodating the rod in a furnace for which heat is provided; and a grinding step (d) for grinding the external diameter of the rod passing through the tempering step. The present invention can improve productivity by continuously heat-treating a rod which is used for a industrial shaft or heavy equipment, can heat-treat a rod which is used for the heavy equipment continuously rather than the separate process, can improve productivity because of the continuous heat-treatment, and has the effect of automatically correcting the external diameter of the rod. [Reference numerals] (S1) High frequency heat treatment step;(S2) External diameter dimension correction step;(S3) Tempering step;(S4) Grinding step |
