横向变厚度轧制金属流动规律及轧制力研究  

Research on metal flow law and rolling force during variable thickness rolling

作　　者：王小巩 王赛 卢日环 张思佳 张广基 刘相华[6] 陈连生 WANG Xiao-gong;WANG Sai;LU Ri-huan;ZHANG Si-jia;ZHANG Guang-ji;LIU Xiang-hua;CHEN Lian-sheng(Key Laboratory of the Ministry of Education for Modern Metallurgy Technology,North China University of Science and Technology,Tangshan 063210,China;Research Center for New Materials Computing,Zhejiang Lab,Hangzhou 310024,China;School of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,China;College of Mechanical Engineering,Hebei University of Architecture,Zhangjiakou 075132,China;Dong Bao Metal Material Technology Ltd.,Zhangjiagang 215625,China;The State Key Laboratory of Rolling&Automation,Northeastern University,Shenyang 110819,China)

机构地区：[1]华北理工大学现代冶金技术教育部重点实验室,河北唐山063210 [2]之江实验室新材料计算中心,浙江杭州310024 [3]燕山大学机械工程学院,河北秦皇岛066004 [4]河北建筑工程学院机械工程学院,河北张家口075132 [5]苏州东宝海星金属材料科技有限公司,江苏张家港215625 [6]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

出　　处：《塑性工程学报》2025年第3期144-151,共8页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(52005432);河北省自然科学基金资助项目(E2021209041;E2021203179)。

摘　　要：以中间薄两边厚类型的横向变厚度板为研究对象,根据不同厚度区实际成形特点,进行了包括弯展轧制和展平轧制两步工艺的横向变厚度轧制试验研究,得到了厚区厚度1.75 mm,薄区厚度1.35 mm的平直板材。试验结果发现薄区的变形机制为轧向延伸和横向伸长的复合变形。为了揭示了横向变厚度轧制过程中的金属流动规律,开展了横向变厚度轧制成形的有限元模拟。通过对变形区的应力状态和金属流动特征进行分析,模拟结果显示薄区进入变形区后,一部分金属应变由以弯曲变形为主转变为轧向延伸和横向宽展复合变形,一部分金属应变则由宽向伸长转变为轧向延伸。此外,对变形区进行了简化,推导了适用于横向变厚度轧制的轧制力计算模型,并与有限元模拟结果进行了对比。Taking the type of rolled profile strips(RPS)with thinner middle and thicker edges as the research object,variable thickness rolling(VTR)experimental studies were conducted based on the actual forming characteristics of different thickness zones.The process comprised two stages:bending-spreading rolling(BSR)and flattening rolling(FR),ultimately the flat sheet with thickness of 1.75 mm in thick zones and thickness of 1.35 mm in thin zones was produced.Experimental results reveal that the deformation mechanism in thin zones involves combined deformation of rolling-direction extension and transverse-direction elongation.To reveal metal flow law during VTR process,finite element simulations were performed.Analysis of stress state and metal flow characteristics demonstrates that after thin zones enter the deformation zone,partial metal strain transitions from predominantly bending deformation to combined deformation pattern of rolling-direction extension and transverse spread,while another portion shifts from transverse-direction elongation to rolling-direction ex-tension.Furthermore,the deformation zone was simplified,and a rolling force calculation model suitable for VTR was derived.This model was then compared with finite element simulation results.

关 键 词：横向变厚度 弯展轧制 展平轧制 金属流动 应力状态 轧制力 

分 类 号：TG335.1[金属学及工艺—金属压力加工]