锻压技术

压下量对中厚板矫直过程中关键参数的影响

英文标题：Influence of rolling reduction on key parameters in the straightening process of plate

作者：刘志芳

单位：重庆理工大学

分类号：TG306

出版年,卷(期):页码：2015,40(5):109-113

摘要：

为了探讨中厚板在不同压下量条件下的矫直力能参数和工艺参数的分布规律，首先根据连续梁的三弯矩方程，推导了矫直力和矫直扭矩的模型，然后以相同的板材作为初始条件，研究了压下量对这些关键矫直参数的影响。研究结果表明：随着压下量的增加，板材与1号矫直辊的接触点逐渐向出口侧偏移，反弯曲率、残余曲率以及奇数辊处的矫直轨迹上升的幅度增加；塑性变形区域和程度逐渐增大，横向残余应力的消减量增加，但消减速度变慢，因此不应为了消减残余应力而盲目增加压下量；矫直力和弯曲内力矩的分布从三角形逐渐向梯形过渡。

To study the distribution rules of straightening force parameters and process parameters of plate during straightening process with different rolling reductions, the straightening force and torque models were deduced according to three moment equations of the continuous beam firstly, and then the influences of rolling reduction on these key straightening parameters were studied by taking the same plate as initial condition. The results show that, with the increment of rolling reduction, the contact point between plate and straightening roller No.1 moves partially to exit, the incremental amplitudes of the bending curvature, residual curvature and straightening trajectory at the odd roller are improved, the area and degree of plastic deformation increase gradually, and the reduction of transverse residual stress increases, but its reduction velocity gets slower. Therefore, the rolling reduction should not be improved blindly to diminish residual stress. And the distribution of straightening force and internal bending torques transforms from triangle to trapezoid.

基金项目：

校级科研启动基金（2014ZD23）

刘志芳(1984-)，男，博士，讲师

参考文献：

［1］井永水, 窦忠强, 李忠富. 矫直理论的新探索[J]. 北京科技大学学报, 2002, 1(2): 64-66. Jing Y S, Dou Z Q, Li Z F. New explore on straightening [J]. Journal of University of Science and Technology Beijing, 2002, 1(2): 64-66.
［2］Park Kee-Cheo, Hwang Sang-Moo. Development of a finite element analysis program for roller leveling and application for removing blanking bow defects of thin steel sheet [J]. ISIJ International, 2002, 42(9): 990-999.
［3］Hoon Huh, Hyoung Wook Lee. The parametric process design of tension leveling with an elasto-plastic finite element method[J]. Journal of Materials Processing Technology, 2001, 113: 714-719.
［4］李胜祗, 刘宇，李珺，等. 宽厚板热矫直和冷却过程的三维有限元模拟[J]. 重型机械, 2009,（3）: 25-29.Li S Z, Liu Y, Li J, et al. 3-D FEM simulation of hot-leveling and cooling process of heavy plate [J]. Heavy Machinery, 2009,（3）: 25-29.
［5］周存龙, 王国栋, 刘相华, 等. 压弯量对轧件矫直变形影响的有限元分析[J]. 塑性工程学报, 2006, 13(2): 78-81. Zhou C L, Wang G D, Liu X H, et al. The FEM analysis for the effect of intermesh to plate leveling deformation [J]. Journal of Plasticity Engineering, 2006, 13(2): 78-81.
［6］徐冰, 薛军安, 丁天军, 等. 中厚板辊式矫直仿真软件设计[J].重型机械, 2008，（5）: 39-42.Xe B, Xue J A, Ding T J, et al. Development of simulation software for roller leveling of plate heavy machinery[J]. Heavy Machinery, 2008,（5）: 39-42.
［7］薛军安, 胡贤磊, 刘相华, 等. 辊式矫直过程弹塑性弯曲数学模型[J]. 钢铁研究学报, 2008, 20(11):33-36. Xue J A, Hu X L, Liu X H, et al. Mathematical model of elastic-plastic bending for roller leveling[J]. Journal of Iron and Steel Research, 2008, 20(11):33-36.
［8］薛军安, 崔丽, 胡贤磊, 等. 辊式矫直过程的接触倾角与曲率耦合分析[J]. 中国冶金, 2009, 12(2): 23-26.Xue J A, Cui L, Hu X L, et al. Analysis of contact angle and curvature during roller leveling Process[J]. China Metallurgy, 2009, 12(2): 23-26.
［9］薛军安, 崔丽, 胡贤磊, 等. 塑性变形率对辊式矫直板材的影响[J]. 东北大学学报, 2009, 30(5): 681-684. Xue J A, Cui L, Hu X L, et al. Effect of plastic deformation rate on plate steel during roller leveling [J]. Journal of Northeastern University, 2009, 30(5): 681-684.
［10］方剑辉, 王占军. 基于有限元仿真的钢管压力矫直方案设计[J]. 锻压装备与制造技术, 2014, 49(2):65-68. Fang J H, Wang Z J. Design of pressure straightening scheme for steel pipe based on the finite element simulation [J]. China Metalforming Equipment and Manufacturing Technology,2014, 49(2):65-68.
［11］杨云, 李友荣, 王志刚. 七辊板带矫直机矫直力计算模型研究[J]. 冶金设备, 2009, 2(4): 55-57. Yang Y, Li Y R, Wang Z G. Study of straighten force calculational model for seven-roller plate[J]. Straightener Metallurgical Equipment, 2009, 2(4): 55-57.
［12］李学通, 杜凤山, 于凤琴. 中厚板矫直过程的有限元研究[J]. 重型机械, 2005, (1): 44-46. Li X T, Du F S, Yu F Q. FEM study on plate straightening[J]. Heavy Machinery, 2005, (1): 44-46.
［13］王勇勤, 刘志芳, 严兴春. 中厚板热矫直过程中曲率的解析[J]. 钢铁, 2012, 47(1): 51-54. Wang Y Q, Liu Z F, Yan X C. Curvature analysis for plate during hot leveling[J]. Iron and Steel, 2012, 47(1): 51-54.
［14］王勇勤, 徐维, 严兴春, 等. 中厚板横向残余应力控制对策研究[J]. 钢铁, 2012, 47(4):60-62.Wang Y Q, Xu W, Yan X C, et al. Research on controlling residual stress in width direction of medium plate [J]. Iron and Steel, 2012, 47(4):60-62.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】