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

作　　者：刘杰[1] 孙胜[1] 管延锦[1] 

机构地区：[1]山东大学模具工程技术研究中心,山东济南250061

出　　处：《中国激光》2008年第2期276-280,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金(50575125)资助项目

摘　　要：建立了厚度为0.1mm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。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 resuhs 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.

关 键 词：激光技术 傲尺度激光弯曲成形 有限元方法 温度梯度机制 数值模拟 

分 类 号：TN249[电子电信—物理电子学] TG665[金属学及工艺—金属切削加工及机床]