| 摘要 |
<p>PURPOSE:To control a roll pressure in the width direction of a rolling sheet and to uniform its thickness in the width direction by providing thermometers to the central part and both end-parts of an upper work roll and operating the parameters, expressing the thermal crown of work roll under the conditions of those temperature differences and whether the sheet is under rolling or not, in case of rolling a steel sheet, etc. CONSTITUTION:A rolling stock 10 such as a steel sheet, is rolled by work rolls 12, 14 provided with intermediate rolls 24, 26 and backup rolls 28, 30. In this case, non- contact thermometers 18, 20, 22 are provided to both end-parts and the central part of the roll 12 to measure the temperatures of said parts, and the results are inputted to an average-value operator 38 and a temp.-difference computing element 40 to detect whether the stock 10 is under rolling or not at the same time by a rolling detector 58, then the parameters, expressing the thermal crown profiles of rolls 12, 14, are operated by a computing element 56 based on said measured conditions. From the operated results, the differences of the thermal crown quantities at respective points, 0.538B, 0.8B, 0.906B, when the width of stock 10 is represented by 2B, are controlled into specific values, to uniform the thickness in the width direction of rolling stock 10.</p> |
