| 摘要 |
<p>PURPOSE:To prevent the meandering of a rolling material and to stabilize an operation by providing a detector for the transverse end position of a rolling material and a detector for the meandering rate of the rolling material to a multi-passes rolling mill having >=3 pieces of work rolls rotating at different peripheral speeds in one stand and changing independently the roll gaps of the rolling passes. CONSTITUTION:The rolling material S is rolled by work rolls 8 and 9, 9 and 10, 10 and 11 in the stage of rolling the material S with the multi-passes rolling stand having the work rolls 8-11 and backup rolls 7, 12. The transverse end position of the material S is detected by the optical detector 21 for the transverse end just before the material enters the space between the rolls 8 and 9. The resultant detection signal is fed to a meandering rate calculator 22 which inputs the calculated value to a relational calculator 23. Said calculator calculates relationally the meandering rate and a target signal 24 from a setter. The deviation signal for the meandering rate by such calculation is processed by a meandering controlling 25 and is applied to bending controllers 26a, 26b which drive liquid pressure cylinders 18a, 18b for the respective work rolls, thereby adjusting the work roll gaps and preventing the meandering of the rolling material.</p> |
