提高厚规格板材的道次变形量对改善厚规格板材的性能具有重要意义。分析轧制扭矩在道次轧制中的变化特点，可知头部咬入阶段的峰值扭矩是制约道次压下量的关键因素。结合轧制过程的稳态轧制扭矩的变化规律，提出尾部大压下法，即在正向道次的尾部阶段增大压下量，将板材尾部轧制成楔形或阶梯形，反向道次轧制时，由于头部厚度薄，对扭矩冲击小，可适当增加道次压下量，从而增大整个道次压下量。通过推导轧制扭矩和压下量的关系式，分析了道次压下量的放大范围。该方法能在不改动轧机设备的前提下提高厚规格板材的芯部变形能力。
To enhance reduction in pass is of significance to improve performances of thick plates. By analyzing the change of torsion in each rolling pass, it is known that the peak torsion at biting-in phase of front end is the critical factor which limits the pass reduction. Based on the change rules of rolling torque at steady phase of the whole rolling process, end heavy-reduction method was put forward, which means that the reduction in pass can be properly increased at the plate end for forward rolling pass to form wedge or ladder shape, then the reduction in pass of full-length can be increased at the subsequent inverse rolling pass because the front end of plate is thinner. The amplifying range of reduction in pass was determined by the relationship of rolling torsion to reduction in pass. The method can effectively increase the core de-formability of thick plate without reforming the rolling equipments, so it is suitable for application in plate mill.
参考文献
| [1] | 陶魄.中厚钢板轧机扭矩监测的应用研究[J].机械设计与制造工程,2002(01):72-74. |
| [2] | C. H. MOON;Y. LEE .Approximate Model for Predicting Roll Force and Torque in Plate Rolling with Peening Effect Considered[J].ISIJ International,2008(10):1409-1418. |
| [3] | 崔桂梅,赵继威,李仲德.基于无线传感器扭矩检测的轧机扭振前馈控制[J].钢铁,2013(07):44-48. |
| [4] | 杜国君,张忠健,高崇一.考虑打滑和双间隙影响的厚板轧机主传动系统扭振[J].钢铁,2013(02):39-43. |
| [5] | 胡贤磊 .中厚板轧机过程模型的研究[D].沈阳:东北大学,2003. |
| [6] | 胡贤磊;矫志杰;邱红雷 等.中厚板轧制规程的综合负荷优化分配方法的应用[J].钢铁研究学报,2003,15(02):24. |
| [7] | Saito Y;Enami T;Tanaka T .Mathematical Model of Hot Defor-mation Resistance With Reference to Microstructural Changes During Rolling in Plate Mill[J].Transactions ISIJ,1985,25(11):1146. |
| [8] | 孙一康.带钢热连轧数学模型基础[M].北京:冶金工业出版社,1979 |
| [9] | 祝夫文,胡贤磊,赵忠,刘相华.中厚板生产中无测厚仪下的自适应轧制模型[J].钢铁,2008(04):57-60,69. |
| [10] | ZHU Fu-wen,ZENG Qing-liang,HU Xian-lei,LI Xi-an,LIU Xiang-hua.Long-and Short-Term Self-Learning Models of Rolling Force in Rolling Process Without Gaugemeter of Plate[J].钢铁研究学报（英文版）,2009(01):27-31,61. |
| [11] | ZHU Fu-wen,HU Xian-lei,ZHAO Zhong,LIU Xiang-hua.Analysis of Process Control Model of Plate MAS Rolling[J].钢铁研究学报(英文版),2010(04):31-33. |
| [12] | L S. Bayoumi .A kinematic analytical approach to predict roll force, rolling torque and forward slip in thin hot strip continuous rolling[J].Ironmaking & Steelmaking: Products and applications,2007(5):444-448. |
| [13] | Lindgren M .Experimental Investigations of the Roll Load and Roll Torque When High Strength Steel is Roll Formed[J].Jour-nal of Materials Processing Technology,2007,191(03):44. |
| [14] | Dixit U S;Chandra S .A Neural Network Based Methodology for the Prediction of Roll Force and Roll Torque in Fuzzy Form for Cold Flat Rolling Process[J].International Journal of Ad-vanced Manufacturing Technology,2003,22(11/12):883. |
| [15] | 孙浩,杨景明,车海军.基于遗传算法的PP及冷连轧轧制规程多目标优化[J].钢铁,2014(09):55-60. |
| [16] | 白埃民,周和敏.轧机与轧制条件对AGC稳定性和厚控的影响[J].轧钢,2001(06):11-13. |
| [17] | HU Xian-lei,WANG Jun,Wang Zhao-dong,LIU Xiang-hua,WANG Guo-dong.Application of Shape Lock-on Method in Plate Rolling[J].钢铁研究学报(英文版),2004(03):24-26. |
| [18] | 姬亚锋,彭文,孙杰,张殿华.基于负荷平衡的监控AGC在热连轧中的应用[J].中国冶金,2014(02):36-39. |
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