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针对汽车底板前横梁内板的热成形过程中存在的工艺难点进行了研究，在常规热冲压工艺基础上进行改进，通过有限元仿真软件Autoform建立了有限元模型，对汽车底板前横梁内板热成形过程进行了模拟。分析不同的模具结构及成形方式后发现，在采取增加零件圆角半径并且采用分步热冲压成形的方法时，零件最大减薄率下降到0.146,最大增厚率下降到0.110,成功解决了汽车底板前横梁内板在成形过程中存在的局部起皱开裂问题。并对试制零件进行了力学性能与微观组织检测，发现经过分步热冲压后，微观组织完全马氏体化，抗拉强度为1350 MPa,通过实际制造的汽车底板前横梁内板零件验证了该方案的可行性。
Abstract：The process difficulties in the hot forming process of the automotive base plate front cross member inner plate were studied. Based on the improvement of the conventional hot stamping process, the finite element model was established by the finite element simulation software Autoform to simulate the hot forming process of the automotive base plate front cross member inner plate. After analyzing different die structures and forming methods, it is found that when increasing the fillet radius of parts and the step hot stamping forming method is adopted, the maximum thinning rate of parts decreases to 0.146 and the maximum thickening rate decreases to 0.110, which successfully solves the problems of local wrinkling and cracking during the forming process of the automotive base plate front cross member inner plate. The mechanical properties and microstructure of the trial-produced parts were tested, and it is found that after step hot stamping, the microstructure is completely martensified and the tensile strength is 1350 MPa. The feasibility of the scheme was verified by the actual manufacturing of automotive base plate front cross member inner plate parts.
[1]刘世锦，冯飞．汽车产业全球化趋势及其对中国汽车产业发展的影响[J]．中国工业经济，2002,(6):5-12.LIU Shijin,FENG Fei.Tendency of globalization of automobile industry and its impact on China's automobile industry[J].China Industry Economy,2002,(6):5-12．
[2]庄厚川，石海鑫，金科，等．汽车轻量化热成形技术应用概述[J]．汽车文摘，2019,(6):8-11.ZHUANG Houchuan,SHI Haixin,JIN Ke,et al.An application overview of hot stamping technologies for automotive lightweight[J].Automobile Digest,2019,(6):8-11．
[3]杨婷，熊自柳，孙力，等．汽车用先进高强钢韧性断裂模型的研究与应用进展[J]．锻压技术，2021,46 (1):10-16,23.YANG Ting,XIONG Ziliu,SUN Li,et al.Research and application progress on ductile fracture model of advanced high-strength steel (AHSS) for automotive[J].Forging&Stamping Technology,2021,46 (1):10-16,23．
[4]李有通，陈益庆，李沁逸，等．车辆A柱加强板热冲压工艺的NSGA-Ⅱ多目标优化[J]．锻压技术，2021,46 (2):59-65.LI Youtong,CHEN Yiqing,LI Qinyi,et al.Multi-object optimization on hot stamping process for vehicle A-pillar reinforced plate by NSGA-II[J].Forging&Stamping Technology,2021,46(2):59-65．
[5]张帅，杨德斌．热冲压成形汽车用高强钢板的组织与性能研究[J]．热加工工艺，2019,48 (7):145-147.ZHANG Shuai,YANG Debin.Study on micro-structure and properties of hot stamping high strength steel sheet for automobile[J].Hot Working Technology,2019,48 (7):145-147．
[6]TONG C,ZHU G,RONG Q,et al.Investigation of austenitising behaviour of medium-Mn steel in the hot-stamping heating process[J].Journal of Materials Processing Technology,2021,297:117269．
[7]张三敏，郎利辉，矫志辉，等．汽车结构钢大曲率变截面管件充液成形工艺优化[J]．锻压技术，2021,46 (4):96-100.ZHANG Sanmin,LANG Lihui,JIAO Zhihui,et al.Optimization on hydroforming process of large-curvature variable-section pipe for automobile structural steel[J].Forging&Stamping Technology,2021,46 (4):96-100．
[8]解焕阳，马治军，毛晴伟，等．某车型后防撞梁热冲压工艺研究[J]．精密成形工程，2019,11 (1):93-97.XIE Huanyang,MA Zhijun,MAO Qingwei,el at.Hot stamping process of rear bumper from a certain car model[J].Journal of Netshape Forming Engineering,2019,11 (1):93-97．
[9]SHI D,WATANABE K,NAITO J,et al.Design optimization and application of hot-stamped B pillar with local patchwork blanks[J].Thin-Walled Structures,2022,170:108523．
[10]杨建，覃显峰，李钊文，等．热成形门环的制造工艺[J]．锻压技术，2021,46 (7):71-78.YANG Jian,QIN Xianfeng,LI Zhaowen,el at.Manufacturing process on thermoforming door ring[J].Forging&Stamping Technology,2021,46 (7):71-78．
[11]朱帅，孙福臻，张泉达，等．基于AUTOFORM模拟的顶盖前边梁加强板热冲压工艺[J]．精密成形工程，2020,12 (4):146-151.ZHU Shuai,SUN Fuzhen,ZHANG Quanda,et al.Hot stamping process for the front side beam strengthening plate of the roof based on AUTOFORM[J].Journal of Netshape Forming Engineering,2020,12 (4):146-151．
[12]VENTURATO G,BRUSCHI S,GHIOTTI A,et al.Numerical modeling of the 22MnB5 formability at high temperature[J].Procedia Manufacturing,2019,29:428-434．
[13]李亚东，鄂宏伟，刘斌，等．基于Autoform的车门内板拼焊板成形仿真分析[J]．塑性工程学报，2021,28 (8):55-63.LI Yadong,E Hongwei,LIU Bin,et al.Simulation analysis of automotive door inner panel stamped for tailor welded sheet forming based on Autoform[J].Journal of Plasticity Engineering,2021,28 (8):55-63.
基本信息:
中图分类号:U466;TG307
引用信息:
[1]谢汶卓,杨建雷,寇兆阳,等.汽车底板前横梁内板热成形工艺[J],2023,30(01):37-41.
基金信息:
国家自然科学基金资助项目(51674004);; 安徽省自然科学基金资助项目(2108085ME143);; 安徽省教育厅高等学校自然科学研究项目(KJ2021ZD0045)