锻压技术

变截面型材拉弯成形工艺仿真与优化

英文标题：Simulation and optimization on stretch bending process for variable cross-section profile

作者：金妍杜建宁崔丽王金权王鑫宇关志彬

关键词：7075铝合金变截面型材拉弯起皱回弹

分类号：TG394

出版年,卷(期):页码：2023,48(2):88-94

摘要：

根据7075铝合金变截面缘条零件的特征建立有限元仿真模型，研究变曲率型材成形过程中的各项工艺参数对零件拉弯成形时所产生的起皱和回弹等表面质量问题的影响。在等截面与变截面的不同条件下的拉弯仿真工艺参数的选择，会直接影响成形结果。加大拉紧力，可以有效解决拉弯后零件的起皱现象；在相同拉紧力下，减小型材宽度，可以避免型材断裂的问题。增加包覆角度，可以降低拉弯后零件的回弹量，也可以使零件卸载后的相对于模具的位移缩短。工艺仿真与工艺参数的优化可以解决拉弯后零件的起皱和回弹现象，并通过工艺试验对仿真后的结果进行工艺验证。

The finite element simulation model was established by the characteristics of 7075 aluminum alloy variable cross section edge strip parts, and the influences of various process parameter in the forming process of variable cross-section profile on the surface quality problems of wrinkling and springback generated during the stretch bending of parts were studied. The selection of stretch bending simulation process parameters under different conditions of equal and variable cross-sections directly affected the forming results. And increasing the tensile force could effectively solve the wrinkling phenomenon of parts after stretch bending. Under the same tensile force, reducing the width of profile could avoid the problem of profile breakage, and increasing the cladding angle could reduce the amount of springback of part after stretch bending and shorten the displacement relative to the die after the part was unloaded. The process simulation and the optimization of process parameters can solve the wrinkling and springback phenomena of parts after stretch bending, and the process verification of simulation results is carried out by the process tests.

基金项目：

金妍(1978-)，女，学士，高级工程师 E-mail：584496540@qq.com

参考文献：

[1]金朝海, 刘聪,李小强,等. 型材拉弯工艺理论解析研究进展[J]. 锻压技术,2021,46(4):21-28.

Jin C H，Liu C，Li X Q，et al. Research progress on theoretical analysis for profile in stretch-bending process [J]. Forging & Stamping Technology，2021,46(4):21-28.

[2]崔广磊, 李超,沈盛军,等. 铝型材三维拉弯工艺[J]. 锻压技术,2022,47(2):78-82.

Cui G L，Li C，Shen S J，et al. Three-dimensional stretch-bending process for aluminum profile[J]. Forging & Stamping Technology,2022,47(2):78-82.

[3]王妍琴, 王东,李继光,等. U形7A09铝型材拉弯成形截面畸变控制[J]. 锻压技术,2022,47(1):119-123,152.

Wang Y Q，Wang D，Li J G，et al. Control on section distortion for U-shaped 7A09 aluminum profiles in stretch-bending[J]. Forging & Stamping Technology, 2022,47(1):119-123,152.

[4]郑高媛, 赵亦希,崔峻辉.车身用铝饰条拉弯成形面畸变缺陷形成规律[J].上海交通大学学报,2022,56(1):53-61.

Zheng G Y,Zhao Y X,Cui J H. The formation of distortion defects on the tensile bending forming surface of aluminum trim strips for the car body[J]. Journal of Shanghai Jiao Tong University,2022,56(1):53-61.

[5]中国航空材料手册编辑委员会. 中国航空材料手册第3卷:铝合金镁合金 [M]. 北京: 中国标准出版社, 2001

Editorial Board of China Aeronautical Materials Manual. China Aeronautical Materials Manual Volume 3: Aluminum Alloy Magnesium Alloy [M]. Beijing: China Standards Press, 2001.

[6]刘志民, 张攀,刘晓立,等. 高强钢辊弯成形中预冲孔尺寸及位置对回弹的影响[J]. 锻压技术,2021,46(12):133-140.

Liu Z M，Zhang P，Liu X L，et al. Influence of size and position of pre-punched hole on springback in roll bending for high-strength steel [J]. Forging & Stamping Technology，2021,46(12):133-140.

[7]胡晓, 尹晶晶,汪创伟,等. 某轿车底盘车架弯管弯制过程的起皱缺陷分析与优化[J]. 锻压技术,2022,47(9):112-117.

Hu X，Yin J J，Wang C W，et al. Analysis and optimization on wrinkling defect in bending process for a car chassis frame bending pipe [J]. Forging & Stamping Technology,2022,47(9):112-117.

[8]卜晓珍, 翟华,周丽华,等.π截面铝合金型材拉弯成形工艺数值模拟研究[J]. 塑性工程学报, 2019, 26(2): 151-161.

Bu X Z, Zhai H, Zhou L H, et al. Numerical simulation research on stretch-bending process for π-section aluminum alloy profiles [J]. Journal of Plasticity Engineering, 2019, 26(2): 151-161.

[9]于传浩, 张毅. 基于Dynaform的凸缘圆筒件拉深工艺有限元分析[J]. 锻压技术,2022,47(2):56-61.

Yu C H，Zhang Y. Finite element analysis on drawing process for cylinder parts with flange based on Dynaform[J]. Forging & Stamping Technology,2022,47(2):56-61.

[10]孟德安, 朱成成,董渊哲,等. 振动辅助塑性成形工艺及机理的研究进展[J]. 锻压技术,2022,47(4):1-13.

Meng D A，Zhu C C，Dong Y Z，et al. Research progress on vibration-assisted plastic forming process and mechanism[J]. Forging & Stamping Technology,2022,47(4):1-13.

[11]刘惠, 刘腾飞,陈宗强,等. 基于试验设计和响应曲面法的大型带筋薄壁铝型材挤压工艺优化[J]. 锻压技术,2022,47(5):144-152.

Liu H，Liu T F，Chen Z Q，et al. Optimization on extrusion process for large reinforced thin-walled aluminum profile based on experimental design and response surface method[J]. Forging & Stamping Technology,2022,47(5):144-152.

[12]黎明, 魏耀光,王永军,等二维型材拉弯成形有限元模拟夹头运动轨迹设计算法[J].塑性工程学报,2019,26(2):253-258.

Li M,Wei Y G，Wang Y J,et al. Two-dimensional profile tension bending finite element simulation chuck motion trajectory design algorithm[J]. Journal of Plasticity Engineering, 2019, 26(2): 253-258.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】