基于响应面法的激光打孔工艺稳健性优化  

Robustness Optimization of Laser Hole-punching Based on Response Surface Model

作　　者：郑明亮 冯鲜[1] 李文霞[1] Zheng Mingliang;Feng Xian;Li Wenxia(School of Mechanical and Electrical Engineering,Taihu University of Wuxi,Wuxi,Jiangsu 214064,China)

机构地区：[1]无锡太湖学院机电学院,江苏无锡214064

出　　处：《应用激光》2021年第5期991-996,共6页Applied Laser

基　　金：江苏省高等学校自然科学基金资助项目(18KJB460027,20KJD460001)

摘　　要：将稳健设计方法应用于激光微细打孔工艺,以克服不确定因素带来的成形质量波动问题。通过考虑激光打孔工艺中噪声因素(加工时间、气体气压等)的随机不确定性对3个可控设计变量(脉冲能量、脉冲宽度和离焦量)的影响,对孔型出口直径进行了分析性稳健优化设计。首先,通过正交试验设计,利用响应面模型建立了质量指标与参数之间的显示二次回归方程;其次,运用泰勒级数展开,得到指标的期望和波动方差,建立了以方差最小为目标和期望值为约束的稳健优化设计模型;最后,结合MATLAB优化算法得到工艺参数的最佳组合,并与确定性优化对比,验证了所采用的优化方法具有良好的效果。The robust design method is applied to laser microdrilling to overcome the quality fluctuation caused by process uncertainty. Considering the stochastic uncertainty of noise factors(processing time, gas pressure, et al.) to affect the controllable pulse energy, pulse width and defocus in the laser hole-punching process, the exit diameter of hole is analytical robust optimal design. Firstly, through orthogonal experimental design, the quadratic regression equation between quality index and parameters is established by using response surface model. Secondly, the expectation and variance of index are obtained by using Taylor series expansion, and a robust optimal design model with minimum variance as the objective and expectation as the constraint is established. Finally, combining with optimization algorithm in MATLAB obtains the best combination of process parameters, and comparing with the deterministic optimization, which verifies the good effect of the robust method.

关 键 词：激光打孔 工艺参数 响应面 稳健优化 

分 类 号：TG386.3[金属学及工艺—金属压力加工]