角平分屈服准则解析热轧厚板展宽轧制力  

Analysis of broadside rolling force for hot heavy plate using angle bisector yield criterion

作　　者：章顺虎[1] 王晓南[1] 赵德文[2] 陈礼清[2] 李长生[2] 刘相华[2] 黄贞益[3] ZHANG Shunhu;WANG Xiaonan;ZHAO Dewen;CHEN Liqing;LI Changsheng;LIU Xianghua;HUANG Zhenyi(School of Shagang Steel and Iron,Soochow University,Suzhou 215021,China;The State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China;School of Metallurgical Engineering,Anhui University of Technology,Maanshan 243002,China)

机构地区：[1]苏州大学沙钢钢铁学院,江苏苏州215021 [2]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819 [3]安徽工业大学冶金工程学院,安徽马鞍山243002

出　　处：《辽宁科技大学学报》2016年第6期418-423,共6页Journal of University of Science and Technology Liaoning

基　　金：国家自然科学基金(51504156);江苏省基础研究计划自然科学基金项目(BK20140334);江苏省高校自然科学研究资助项目(14KJB460024);中国博士后科学基金资助项目(2014M561707)

摘　　要：根据厚板轧制变形特点,提出了适用于展宽轧制阶段的二维流函数速度场。利用角平分屈服准则对提出的速度场进行解析求得了内部变形功率表达式。采用共线矢量内积法与积分中值定理分别求得了摩擦功率与剪切功率表达式。经总功率泛函最小化获得了轧制力矩与轧制力的解析解。与国内某厂320 mm板坯的实际轧制数据比较表明,该解析解具有较高的预测精度,最大误差不超过10.45%。轧制工艺参数分析表明,随着压下率的增加或几何因子的减小,轧制力矩与轧制力增加;摩擦系数对轧制力矩和轧制力的影响较小。According to the deformation characteristic of heavy plate rolling,a two-dimensional stream functionvelocity field for broadside rolling is proposed. With the proposed velocity field and the bisector yield criterion,the internal deformation energy rate is analyzed. By co-line vector inner product method and integralmean value theorem,both the expressions of friction energy rate and shear energy rate are deduced. Ultimately,by minimization of the total energy rate the analytical rolling torque and force are obtained. Comparedwith the experimental data of 320 mm billet from one domestic factory,it is shown that the present predictionhas a high precision since the maximum error is less than 10.45%. Analysis of the rolling parameters showsthat as the relative reduction increases or the shape factor decreases the rolling torque and force increase;theeffect of friction factor on the rolling torque and force is found to be negligible.

关 键 词：展宽轧制 流速度场 屈服准则 总功率泛函 轧制力 

分 类 号：TG301[金属学及工艺—金属压力加工]