三维异形截面管件充液成形工艺及优化分析  

Hydroforming Process and Optimization Analysis of Three Dimensional Special Section Tube

作　　者：张小勇 程鹏志 王耀 阮尚文 成刚 王增华 ZHANG Xiao-yong;CHENG Peng-zhi;WANG Yao;RUAN Shang-wen;CHENG Gang;WANG Zeng-hua(School of Automotive Studies,Tongji University,Shanghai 200000,China;Suzhou Automotive Research Institute(xiangcheng),Tsinghua University,Suzhou 215134,China;Aerospace Intelligent Manufacturing(Beijing)Engineering Technology Co.,Ltd.,Beijing 100191,China;Tianjin Tianqi Mo Aerospace High Pressure Forming Technology Co.,Ltd.,Tianjin 300000,China;School of Mechanical Engineering,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]同济大学汽车学院,上海200000 [2]清华大学苏州汽车研究院(相城),江苏苏州215134 [3]航宇智造(北京)工程技术有限公司,北京100191 [4]天津天汽模航宇高压成形技术有限公司,天津300000 [5]河北工业大学机械工程学院,天津300401

出　　处：《精密成形工程》2020年第3期125-130,共6页Journal of Netshape Forming Engineering

基　　金：江苏省基础研究计划(自然科学基金)青年基金(BK20160298);国家科技重大专项(SK201901A30-01);河北省自然科学基金青年基金(E2019202224)。

摘　　要：目的研究三维异形截面汽车纵梁充液成形过程的变形规律。方法通过数值模拟和试验研究相结合的方法,分析多工序中的充液成形过程,对影响构件成形性能的液压力加载路径关键参数进行分析。结果线性加载路径下试件最大减薄率为26.3%,试件出现了局部开裂现象。两段式线性加载条件下最大起皱指标为0.149,试件出现了起皱缺陷,最大壁厚减薄为23.2%,开裂现象并未明显缓解。分段式线性加载条件下试件的最大减薄率仅为16.8%,贴模偏移量为1.89 mm,未出现起皱叠料现象,成形质量较好,同时,试验结果与数值模拟结果有较好的一致性。结论液压力加载路径对试件壁厚分布影响较大,采用分段式线性加载,可以实现低压阶段的分段加压和有效补料,以及后期的线性高压整形,试件成形质量较高。The paper aims to study the deformation rule of three-dimensional special cross-section automobile longitudinal beam in hydroforming. Through the combination of numerical simulation and experimental research, the process of liquid filling forming in the multi process was analyzed, and the key parameters of the hydraulic pressure loading path that affected the forming performance of the components were analyzed. Combined with numerical analysis and test verification: under linear loading path, the maximum thinning rate of the specimen was 26.3%, and the specimen had local cracking;under two-stage linear loading condition, the maximum wrinkle index was 0.149, the specimen had wrinkle, the maximum wall thickness thinning was 23.2%, and the cracking phenomenon was alleviated obviously;under sectional linear loading condition, the maximum thinning rate of the specimen was only 16.8%, the offset was 1.89 mm, and the forming quality was good and free from wrinkle. At the same time, the experimental results were in good agreement with the numerical simulation results. The loading path of hydraulic pressure has a great influence on the wall thickness distribution of the test piece. The sectional linear loading can realize the sectional pressure and effective feeding in the low-pressure stage, and the linear high-pressure shaping in the later stage. The forming quality of the test piece is high.

关 键 词：液压成形 三维异形截面 纵梁 高强钢 数值模拟 

分 类 号：TG394[金属学及工艺—金属压力加工]