微尺度激光弯曲成形数值模拟与实验研究

刘杰; 孙胜; 管延锦

中国激光, 2008, 35 (2): 276, 网络出版: 2008-03-05

微尺度激光弯曲成形数值模拟与实验研究

Numerical and Experimental Study on the Laser Micro-Bending Process

论文大纲

刘杰 ^*孙胜管延锦

作者单位

山东大学模具工程技术研究中心, 山东济南 250061

摘要

建立了厚度为0.1 mm的不锈钢钢箔激光弯曲成形的三维热力耦合有限元模型,并采用有限元软件MSC.Marc模拟计算得到了箔材弯曲变形过程中的温度场、变形场与应力应变场。分析了应力、温度、变形三者之间的内在关系,阐述了激光弯曲成形的温度梯度机制(TGM)。建立了微尺度激光弯曲成形的实验装置,验证了有限元模型(FEM)的可靠性,模拟计算结果与实验结果吻合较好。通过实验分析了激光功率、扫描速度以及激光扫描次数等工艺参数对激光弯曲角度的影响规律,并对影响原因进行了初步分析,为进一步对微尺度激光弯曲成形机制及工艺的研究打下了基础。

Abstract

A three-dimensional (3D) thermal-mechanical finite element analysis model for laser micro-bending of 0.1 mm thick stainless steel foil is developed. The software MSC.Marc is used in the numerical analysis of this process. The detailed simulation results such as temperature distribution, deformation filed, stress and strain field are obtained. The inner relationship among them is investigated and the temperature gradient mechanism (TGM) is expressed. Laser micro-bending experiments have been carried out on the steel foil samples, and the simulation results are in good agreement with the experimental results. Through analyzing the experimental results, the influence of laser power, scanning velocity and scanning times on bending angles is described. The works of the finite element method (FEM) simulation and experiments of the laser micro-bending are helpful for further studying on this process.

参考文献

[1] . Richard Zhang, Xianfan Xu. High precision microscale bending by pulsed and CW lasers[J]. Journal of Manufacturing Science and Engineering, 2003, 125(3): 512-518.

[2] . Richard Zhang, Xianfan Xu. Laser bending for high-precision curvature adjustment of microcantilevers[J]. Appl. Phys. Lett., 2005, 86(2): 021114-1.

[3] G. Dearden, C. Taylor, K. Bartkowiak et al.. An experimental study of laser micro-forming using a pulsed Nd:YAG laser and scanning optics [C]. Proceeding of the 21st International Congress on Applications of Laser & Electro-Optics, 2003, M409:1～10

[4] Guan Yanjin, Sun Sheng, Zhao Guoqun et al.. Study on relationship between material properties and bending angles in laser forming process of sheet metals [J]. Chinese J. Lasers, 2004, 31(4):499～504
管延锦,孙胜,赵国群等. 材料性能参数与板料激光弯曲成形角度的相关性研究[J]. 中国激光, 2004, 31(4):499～504

[5] Li Weimin, M. Geiger, F. Vollertsen. Study on laser bending of metal sheets [J]. Chinese J. Lasers, 1998, A25(9):859～864
李纬民,M. Geiger,F. Vollertsen. 金属板材激光弯曲成形规律的研究[J]. 中国激光, 1998, A25(9):859～864

[6] Chen Huohong, Yin Weiqi. User Guide of MSC.Marc Secondary Development [M]. Beijing: Science Press, 2004. 54～62
陈火红,尹伟奇. MSC.Marc二次开发指南[M]. 北京：科学出版社, 2004. 54～62

[7] . McBride, F. Bardin, M. Gross et al.. Modelling and calibration of bending strains for iterative laser forming[J]. J. Phys. D:Appl. Phys., 2005, 38: 4027-4036.

刘杰, 孙胜, 管延锦. 微尺度激光弯曲成形数值模拟与实验研究[J]. 中国激光, 2008, 35(2): 276. Liu Jie, Sun Sheng, Guan Yanjin. Numerical and Experimental Study on the Laser Micro-Bending Process[J]. Chinese Journal of Lasers, 2008, 35(2): 276.

微尺度激光弯曲成形数值模拟与实验研究

关于本站 Cookie 的使用提示

全站搜索

微尺度激光弯曲成形数值模拟与实验研究

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索