基于双流函数的立轧力能参数研究  

Research on mechanics parameters of edge rolling based on dual-stream function

作　　者：刘元铭 王涛 王振华[2,3,4] 郝平菊[1] 和东平 LIU Yuan-ming;WANG Tao;WANG Zhen-hua;HAO Ping-ju;HE Dong-ping(College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Advanced Forming and Intelligent Equipment Research Institute,Taiyuan University of Technology,Taiyuan 030024,China;Engineering Research Center of Advanced Metal Composites Forming Technolgy and Equipment,Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China;TYUT-UOW Joint Research Center,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学机械与运载工程学院,山西太原030024 [2]太原理工大学先进成形与智能装备研究院,山西太原030024 [3]太原理工大学先进金属复合材料成形技术与装备教育部工程研究中心,山西太原030024 [4]太原理工大学中澳联合研究中心,山西太原030024

出　　处：《塑性工程学报》2020年第8期172-178,共7页Journal of Plasticity Engineering

基　　金：国家自然科学基金青年科学基金资助项目(51904206,51805359);国家自然科学基金重点项目(U1710254);国家重点研发计划项目(2018YFB1308700);山西省科技重大专项(20181102015,MC2016-01);山西省应用基础面上青年基金资助项目(201801D221130);山西省高等学校科技创新项目(2019L0258)。

摘　　要：根据体积不变条件,建立了三次函数模型描述立轧板坯的三维狗骨形状,然后提出了基于双流函数的变形区金属三维流动的运动许可速度场。根据刚塑性第一变分原理,获得变形区的内部塑性变形功率、剪切功率和摩擦功率,然后得到了轧制力能和狗骨形状参数的计算模型。将本模型预测的轧制力数据与现场的实测值对比,狗骨形状预测值和其他模型计算值对比,预测精度良好。此外,基于模型计算结果研究了不同减宽率、板坯厚度、摩擦因子和立辊半径等轧制工艺参数对应力状态影响系数的影响规律。According to the incompressibility condition,the cubic function model was established to describe three-dimensional dog bone shape of the edge rolling slab,and then the kinematically admissible velocity field of three-dimensional metal flow in the deformation zone was proposed on the basis of the dual-stream function. According to the first variational principle of rigid-plastic,the plastic deformation power,shear power and friction power were received,and the calculation models of parameters of rolling force energy and dog bone shape were obtained. The rolling force predicted by this model was compared with the measured value in the field,and the predicted value of dog bone shape was compared with the calculated value of other model and the prediction accuracy is good. Additionally,the impacts laws of various rolling process parameters such as width reduction ratio,slab thickness,fraction factor and edge roll radius on stress state influence coefficient were researched.

关 键 词：立轧 狗骨形状 三次函数模型 双流函数 力能参数 

分 类 号：TG331[金属学及工艺—金属压力加工]