锻压技术

虚拟成形速度对渐进成形数值模拟精度的影响

英文标题：Influence of virtual forming speed on the precision in the numerical simulation of incremental forming

作者：杨凯程赵伟陈丽

单位：福州大学

分类号：TG386

出版年,卷(期):页码：2015,40(2):103-106

摘要：

针对渐进成形数值模拟过程中精度不足的问题，以成形中板料动能和内能的比值小于5%、数值模拟零件和实验零件壁厚误差小于3%为判断准则，采用数值模拟与实验研究相结合的方法，并以圆锥件为例，研究了渐进成形数值模拟中工具头虚拟成形速度对模拟精度的影响。结果表明：虚拟成形速度对数值模拟精度影响较大，过大的虚拟成形速度会降低模拟精度；过小的虚拟成形速度虽然能提高模拟精度，但会降低模拟效率。当虚拟成形速度为800 mm·s-1 时，既能保证模拟精度，也能提高模拟效率。

For the problem of low precision in the numerical simulation of the incremental forming, with the ratio of kinetic energy to internal energy less than 5% and the error of thickness less than 3% proposed as a set of criterion, the numerical simulation and experiment were adopted in the study. Taking cone part as an example, the influence of virtual forming speed on the precision in the numerical simulation of incremental forming was investigated. The results show that the virtual forming speed has a greater impact on the precision of numerical simulation, excessive virtual forming speed can reduce the precision in numerical simulation. Although slow virtual forming speed can improve numerical simulation precision, the numerical simulation efficiency will be reduced. When the virtual forming speed is at 800 mm·s-1, the precision of numerical simulation can be ensured and numerical simulation efficiency can be improved as well.

基金项目：

福建省大学生创新创业项目（201313470019）

杨凯程（1992-），男，学士赵伟（1987-），男，硕士，助教

参考文献：

［1］李龙杲, 高霖, 韦红余. 金属板料渐进成形有限元仿真过程中复杂成形路径的构建方法[J]. 机械工程学报, 2006, 42(6): 227-230.Li L G, Gao L, Wei H Y. Method on generating complex loading path for FEM simulation of incremental sheet metal forming process[J]. Chinese Journal of Mechanical Engineering, 2006, 42(6): 227-230.
［2］赵伟, 詹艳然. 基于数值模拟的方锥件渐进成形规律研究[J]. 热加工工艺, 2013, 42(1): 103-105.Zhao W, Zhan Y R. Study on law of incremental forming square cone-shaped parts based on numerical simulation[J]. Hot Working Technology, 2013, 42(1): 103-105.
［3］刘罡, 林忠钦, 张卫刚. 薄板成形仿真动力显式算法的虚拟凸模速度分析[J]. 上海交通大学学报, 2000, 24(10): 1406-1408.Liu G, Lin Z Q, Zhang W G. Study on virtual punch velocity in simulation of sheet metal forming by explicit method[J]. Journal of Shanghai Jiaotong University, 2000, 24(10): 1406-1408.
［4］解后循, 朱茂桃, 张敏中. 虚拟凸模速度对冲压仿真结果的影响[J]. 模具工业, 2003, 29(3): 17-19.Jie H X, Zhu M T, Zhang M Z. The effect of the virtual punch velocity on the stamping simulation result[J]. Die & Mould Industry, 2003, 29(3): 17-19.
［5］胡玉梅, 张健, 邓兆祥. 板料成形仿真中冲模速度的确定方法[J]. 机械工程学报, 2007,12(43):88-92.Hu Y M, Zhang J, Deng Z X. Definition method on punch velocity in forming simulation of sheet metal[J]. Chinese Journal of Mechanical Engineering, 2007, 12(43): 88-92.
［6］曾国, 来新民, 于忠奇. 多道次辊弯成形动力显式仿真的虚拟速度[J]. 上海交通大学学报, 2008, 42(9): 1429-1432．Zeng G, Lai X M, Yu Z Q. The virtual speed in dynamic explicit FEM simulation for multi-stand roll forming[J]. Journal of Shanghai Jiaotong University, 2008, 42(9): 1429-1432．
［7］王进, 姜虎森, 陶龙，等. 板料渐进成形极限图测试方法研究[J]. 锻压技术, 2013, 38(2): 34-36.Wang J, Jiang H S, Tao L, et al. Study on experimental method of measuring forming limit diagram in incremental sheet forming[J]. Forging & Stamping Technology, 2013, 38(2): 34-36.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】