基于Taguchi的铜合金薄板脉冲激光弯曲成形工艺研究

为研究铜合金薄板的脉冲激光弯曲成形工艺, 基于 Taguchi方法对单道单次扫描成形 V形件的工艺进行了正交试验设计。以弯曲角为响应目标, 以望大特性的信噪比评估弯曲角的品质特性, 得到了最佳工艺参数组合: 激光功率 P为 24W, 扫描速率淄为 500 mm/min, 离焦量 L为 4 mm, 实验测得弯曲角为 1.362毅。在成形 V形件的实验基础上采用多道多次扫描方式进行了预定曲率半径的圆弧曲面成形实验。依据扫描次数与弯曲角之间的关系规划了扫描路径和扫描次数, 实验结果与预设目标有较好的一致性; 半路径扫描比全路径扫描更能得到理想的变形效果和表面质量。实验中发现, 因铜合金薄板热传导率高、厚度小, 激光扫描时上下表面的温度梯度不太明显, 成形机理以屈曲机理为主。

Abstract

In order to study pulsed laser bending process for C194 copper alloy thin-plate, based on Taguchi method orthogonal testis adopted to form V -shape by signal scan. Using signal -to -noise ratio (larger -the -better), the effect of the bending angle isevaluated, and the optimal combination of laser process parameters is obtained, that is, laser power is 24 W, scanning speed is 500mm/min, defocusing amount is 4mm, and the experimental result of bending angle is 1.362毅. Based on the experiment of forming V-shape, the pulsed laser forming experiment of circular-arc surface with predetermined curvature radius by repeated multiple -passscanning is carried out. Scanning path and scanning times are planned based on the relationship between the scanning times and thebending angle, the experimental result and the presupposition target are in good agreement; ideal shape and excellent surface qualitycan be obtained by the method of half path scan in width. It has been found during experiments that due to high thermal conductivityand film thickness of copper alloy thin -plate, the temperature gradient between upper and lower surfaces is insignificant in theprocess of multiple-pass scan by pulsed laser, and buckling mechanism plays a dominant role in laser bending.

参考文献

[1] WULFSBERG JP, TERZIM.Investigation of laser heating in microforming applying sapphire tool [J].Annals of the CIRP, 2007, 56(1): 321-326.

[2] YANG LIJUN, WANG YANG.Analysis on the stress field during 3D laser forming of square sheet to spherical dome[J].Journal of Plasticity Engineering, 2008, 15(3): 86-92.杨立军, 王扬.正方形薄板激光三维成形球冠面的应力场分析[J]. 塑性工程学报, 2008, 15(3): 86-92.

[3] ZHOU JIANZHONG, LIU HUIXIA.Laser Rapid Manufacturing Technology & Application [M].Beijing: Chemical Industry Press, 2009: 2.周建忠, 刘会霞.激光快速成形制造技术及应用[M].北京: 化学工业出版社, 2009: 2.

[4] DAHOTRE NB, HARIMKAR SP.Laser fabrication and machining of materials[J].Laser forming, 2008(8): 291-352.

[5] 吴东江, 马广义, 曹先锁, 等.脉冲激光弯曲成形技术中硅片表面的形貌分析[J]. 中国激光, 2007, 34(11): 1589-1593.

WU DONGJIANG, MA GUANGYI, CAO XIANSUO, et al.Analysis of silicon surface profile of pulsed laser bending processing [J].Chinese J. Lasers, 2007, 34(11): 1589-1593.

[6] JEONGH, HATAS.Microforming of three-dimensional micro-structures from thin-film metallic glass [J].Journal of Mi-croelectromechanical Systems, 2003(12): 42-52.

[7] WANGJIANGTAO, MA JINGHUAI, SHENMINGQIAN. Laser bending process optimization of sheet metal based on integrated genetic algorithm [J].Porging &Stamping Technology, 2009, 34(5): 156-158.王江涛, 马景槐, 申明倩.集成遗传算法下板料激光弯曲成形工艺优化[J]. 锻压技术, 2009, 34(5): 156-158.

[8] LIU REN, WANG ZHONGLEI, JI ZHONG.ANN based process optimization of metal sheet laser forming [J].Porging &Stamping Technology, 2005(1): 26-29.刘韧, 王忠雷, 季忠.基于人工神经网络的板料激光成形工艺优化[J]. 锻压技术, 2005(1): 26-29.

[9] TAGUCHIG, CHOWDHURYS, WUY.Taguchi’s Quality engineering handbook [M].New Jersey: John Wiley& Sons Press, 2004.

[10] 于奎刚，金隼，来新民.基于Taguchi 的柔性薄板装配夹具稳健设计[J]. 上海交通大学学报, 2009, 43（12）：1941-1945.

YU KUIGANG, JING SUN, LAI XINMIN.A Fixture Locating Robust Design Method of Compliant Sheet Metal Assembly Based on Taguchi Method[J].Journal of Shanghai Jiaotong University, 2009, 43(12): 1941-1945.

[11] 裴继斌, 张立文, 张全忠, 等.扫描次数对钢板激光弯曲成形影响的模拟 [J]. 中国激光, 2007, 34(12): 1721-1725.

PEI JIBIN, ZHANG LIWEN, ZHANG QUANZHONG, et al.Simulation on influence of scanning passes during laser bending of steel plate[J].Chinese J. Lasers, 2007, 34(12): 1721-1725.

蒋素琴, 周建忠, 胡玲玲, 吴建华, 裴旭. 基于Taguchi的铜合金薄板脉冲激光弯曲成形工艺研究[J]. 应用激光, 2012, 32(4): 299. Jiang Suqin, Zhou Jianzhong, Hu lingling, Wu Jianhua, Pei Xu. Laser Bending Parameters and Control Factor Levels[J]. APPLIED LASER, 2012, 32(4): 299.

基于Taguchi的铜合金薄板脉冲激光弯曲成形工艺研究

关于本站 Cookie 的使用提示

全站搜索

基于Taguchi的铜合金薄板脉冲激光弯曲成形工艺研究

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索