锻压技术

预弯工艺及摩擦系数对管材内高压成形的影响

英文标题：Influences of pre-bending process and friction coefficient on

作者：李彩霞张晓峰王敬

单位：重庆工商职业学院

分类号：TG394

出版年,卷(期):页码：2018,43(11):48-52

摘要：

针对汽车用变截面薄壁空心零件的内高压成形技术，为研究不同预弯工艺和摩擦系数对零件内高压成形质量的影响规律，采用有限元软件AUTOFORM进行数值模拟，对比分析了分别采用绕弯工艺、无内压支撑压弯工艺和有内压支撑压弯工艺，以及在内高压成形时模具与管材之间的不同摩擦系数，对零件成形后的最大减薄率、最大增厚率和最大贴模间隙的影响。结果表明: 采用有内压支撑压弯后的内高压成形零件较采用其他两种预弯成形工艺的零件，壁厚分布更均匀，最大贴模间隙更小，尺寸精度更高；同时，在内高压成形时，模具与管材之间的摩擦系数越小，材料流动性就越好，壁厚分布更均匀，零件最大贴模间隙越小。

For the technology of hydroforming of thin-walled hollow parts with variable cross section for automobile, in order to study the influences of different pre-bending processes and friction coefficient on the hydroforming quality of part, the influences of the rotation bending process, the bending process without internal pressure support and the bending process with internal pressure support, and different friction coefficients between die and tube during the hydroforming on the maximum thinning rate, the maximum thickening rate and the maximum gap between die and tube were analyzed comparatively by the finite element software AUTOFORM. The results show that under the bending process with internal pressure support, the wall thickness distribution is more uniform, the maximum gap between the die and the tube is smaller, and the dimension accuracy is higher than the other two kinds of pre-bending forming processes. Meanwhile, during the hydroforming process, the smaller the friction coefficient between die and tube is, the better the material fluidityis, the more uniform the wall thickness distribution is, and the smaller the maximum gap between die and tubeis.

基金项目：

重庆市教委科学技术研究项目（KJ1503911）

李彩霞（1984-），女，硕士，副教授,E-mail：cqlicx@163.com

参考文献：

[1]韩聪，苑世剑. 汽车轻量化结构件内高压成形技术与装备最新进展[J]. 汽车工艺师，2017，(4)：24-26.

Han C, Yuan S J. Latest development of high pressure forming technology and equipment for light-weight automotive structural parts[J]. Auto Manufacturing Engineer, 2017, (4): 24-26.

[2]苑世剑. 现代液压成形技术[M]. 北京：国防工业出版社，2009.

Yuan S J. Modern Hydroforming Technology[M]. Beijing: National Defense Industry Press, 2009.

[3]李武全. 液压成形轻量化技术在副车架的应用[J]. 装备制造技术, 2018, (1)：215-218.

Li W Q. Application of hydraulic forming lightweight technology for subframe[J]. Equipment Manufacturing Technology, 2018, (1): 215-218.

[4]苑世剑，何祝斌，刘钢，等. 内高压成形理论与技术的新进展[J]. 中国有色金属学报，2011，21(10)：2523-2533.

Yuan S J, He Z B, Liu G, et al. New developments in theory and processes of internal high pressure forming[J]. The Chinese Journal of Nonferrous Metals，2011, 21(10): 2523-2533.

[5]陈名涛, 肖小亭, 刘易凡，等. 内压和加载路径对并列双支管内高压成形性的影响[J]. 塑性工程学报，2017，24(5)：19-24.

Chen M T, Xiao X T, Liu Y F, et al. Effects of internal pressure and loading path on hydroforming of parallel arrangement multi-way tube[J]. Journal of Plastic Engineering, 2017, 24(5): 19-24.

[6]周林. 异形截面空心结构件内高压成形工艺研究[D]. 合肥：合肥工业大学，2008.

Zhou L. Research on Hydroforming of Profiled Cross-section Hollow Component[D]. Hefei: Hefei University of Technology, 2008.

[7]蔡洋，王小松，苑世剑. 预弯对铝合金管材内高压成形缺陷与尺寸精度的影响[J]. 材料工程，2017，45(9)：108-115.

Cai Y, Wang X S, Yuan S J. Effects of pre-bending on defect and dimensional precision in hydroforming of aluminum alloy tubes[J]. Journal of Materials Engineering, 2017,45 (9): 108-115.

[8]刘忠利，郭训忠，徐金波，等. 汽车排气管件内高压成形数值模拟及试验[J]. 塑性工程学报，2015，22(4)：88-92.

Liu Z L, Guo X Z, Xu J B, et al. Numerical simulation and experiment of the hydroforming for automobile exhaust pipe[J]. Journal of Plastic Engineering, 2015, 22 (4): 88-92.

[9]唐勇，薛克敏，李萍，等. 汽车前梁多道次内高压成形[J]. 塑性工程学报, 2009, 16(2): 19-23.

Tang Y, Xue K M, Li P, et al. A simulation study on the multi-step hydroforming process for automotive front transom[J]. Journal of Plastic Engineering, 2009, 16(2): 19-23.

[10]Hu H W, Fan K T, Chen T Y , et al. Application of tube hydroforming and bending to scooter frame design[A]. Yuan S J. Tube Hydroforming Technology 2015[C]. Harbin: Harbin Institute of Technology Press, 2015.

[11]宋鹏，王小松，韩聪，等. 铝合金矩形截面内高压成形圆角充填行为研究[J]. 机械工程学报, 2010, 46(12): 59-64.

Song P, Wang X S, Han C, et al. Filling behavior of transition corner in hydroforming of aluminum alloy rectangular section tube [J]. Journal of Mechanical Engineering, 2010, 46(12): 59-64.

服务与反馈：

【文章下载】【加入收藏】