| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve the precision of the calculation of the rolling load to be used for the control of the actual operation of the cold rolling, and to provide the method estimating the rolling load in the cold rolling by using flow stress formulas facilitating learning. SOLUTION: The sum of static flow stress ks and dynamic flow stress kd is set to a cold flow stress (k), and the cold flow stress is found by Formula I k=ks +kd , Formula II ks =a0 +a1 .ε-a2 .exp(-a3 .ε). (whereεis a plastic strain, and when the plate thickness of a stock is expressed by H and the plate thickness after working is expressed by (h),εis found byε=1n (H/h), and a0 , a1 , a2 and a3 are constants to be determined by the kinds of steels and a hot rolling condition.) The rolling load in the cold rolling is estimated by the cold flow stress found in this way.</p> |
