| 摘要 |
<p>PURPOSE:To improve crown amounts and crown amount reducing amounts and to surely establish schedule-free rolling by installing at least 2 taper roll shift rolling stands and changing respective shift amounts within a range by which a sum of the respective shift amounts equals to a prescribed amount. CONSTITUTION:At least two taper roll shift rolling stands are installed. In the stands, upper and lower work rolls 2, 3 whose one end is formed into a tapered shape are positioned so that the tapered parts are oppositely located in right and left positions to each other and the rolls 2, 3 are shifted into opposite directions every rolling tie or every an optional number of rolling times so that both edges of a steel stock 1 locate in the tapered part on a basis of a taper starting point changing in accordance with wear of the rolls 2, 3. Respective shift amounts of the rolls 2, 3 are changed within a range by which a sum of shift amounts of the two stands equals to a prescribed amount. Hence, wear of the rolls 2, 3 and thermal crown amounts over the total width of the stock 1 are uniformized and crown amounts and crown amount reducing amounts are improved, so that stable schedule-free rolling is established.</p> |
