定宽压力机定宽过程中金属流动规律与板坯断面形状研究  

Study on metal flow rule and slab section shape during sizing press process

作　　者：彭文[1] 武文腾 万子龙 李旭东 张殿华[1] PENG Wen;WU Wenteng;WAN Zilong;LI Xudong;ZHANG Dianhua(State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China;Research Institute of Technology,Shougang Group Co.Ltd.,Beijing 100043,China)

机构地区：[1]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 [2]首钢集团有限公司技术研究院,北京100043

出　　处：《中南大学学报（自然科学版）》2021年第10期3419-3428,共10页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51704067,51634002);中央高校基本科研业务专项资金资助项目(N180704006,N2004010)。

摘　　要：基于刚塑性变分原理,利用ANSYS/LS-DYNA建立SP定宽过程有限元模型,使用有限元法分析板坯初始宽度、初始厚度和侧压量等工艺参数对断面金属流动的影响规律,进一步通过曲线拟合建立各工艺参数与狗骨厚度、中部厚度和狗骨影响区的函数关系,实现断面形状的模型化描述。研究结果表明:现场测量数据与狗骨断面的模拟曲线吻合度高,曲线的相对误差为1.20%;狗骨厚度、中部厚度和狗骨影响区所占比例的预测精度分别为98.78%,98.54%和98.10%,验证了所建立模型的有效性,为后续粗轧过程宽度和厚度的高精度控制提供了基础。A finite element model of SP sizing process was established by ANSYS/LS-DYNA based on the principle of rigid-plastic variation, and the influence of the initial slab parameters, such as initial width, thickness and the width reduction was analyzed by the finite element method. Furthermore, the functional relationship was set up via curve fitting, in which the crafts parameter, the height of the bone peak, the thickness of the middle part and the range of dog bone were taken into consideration, finally the cross-sectional shape was described. The results show that the simulation and field data are in high conformity, except that the deviation is about 1.20%. The prediction accuracy of dog bone thickness, middle thickness and proportion of dog bone affected zone is 98.78%,98.54% and 98.10%, respectively, which verifies the validity of the established model and lays a foundation for the high-precision control of width and thickness in the subsequent rough rolling process.

关 键 词：定宽压力机(SP) 狗骨 有限元分析 曲线拟合 

分 类 号：TG335.5[金属学及工艺—金属压力加工]