| 摘要 |
<p>PURPOSE:To improve the shape and dimensional accuracy of products by controlling at least one of a rolling draft and a roll rotating speed of a three-way roll rolling mill based on at least one of a measured sectional profile of a rolled stock and an axial force generated in the rolled stock. CONSTITUTION:A rolled stock is made into a product through a furnace 1, rough rolling mill group 2, intermediate rolling mill group 3, and finish rolling mill group 4. At least two stands in the downstream side of the mill group 4 are replaced with three-way roll rolling mills 40. The measured result of a sectional profile of the stock by a profile meter 6 and the measured result of axial forces by an axial force detector 8 are sent to a computer 7. A rolling draft controller 9 and a rotation controller 10 control a rolling draft and a rotating speed of the mills 40 based on those measured results and the control specification. In this way, bars with the high accurate shape and dimension are manufactured.</p> |
