面曝光快速成形系统制作工艺参数的优化研究  

Optimization of the Processing Parameters of Mask Projection Stereolithography System

作　　者：胥光申[1] 杨根[1] 

机构地区：[1]西安工程大学机电工程学院,西安710048

出　　处：《机械科学与技术》2015年第2期224-228,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(50745017;50875194);陕西省教育厅产业化培育项目(2011JG17)资助

摘　　要：应用田口方法的信噪比(SN)对液面曝光辐照度、曝光时间、液面等待时间及面收缩补偿系数4个主要影响面曝光快速成形的因素进行了优化试验研究。采用自由度为26的L27(313)形式的正交表,通过实验得到各个因素不同水平对应的制作零件尺寸误差的信噪比。实验结果的直观分析和方差分析表明:面收缩补偿系数、液面曝光辐照度、面收缩补偿系数与液面曝光辐照度的交互作用及液面等待时间对制作精度有显著影响;面收缩补偿系数与液面等待时间之间的交互作用对制作精度有一定的影响。针对面曝光快速成形系统,得出了以曝光平面内的制作精度为优化目标的制作参数的最佳组合。试验结果表明:在最佳的制作工艺参数条件下,曝光平面内的制作误差在±10μm范围内,显著提高了面曝光快速成形制作精度。Taguchi method is used to optimize the four main influencing factors including the irradiation( factor D),exposure time( factor C),liquid surface waiting time( factor B) and the coefficient of shrinkage compensation( factor A). Adopting orthogonal table of the L27( 313),the signal-to-noise ratio of the building dimension error is obtained with different level of these factors. Through analyzing the intuitive and variance in orthogonal table,it is found that the factors A,B,D and A × D significantly affect the dimension accuracy,the interaction between the factors A and B also affect on the dimension accuracy. Based on the experimental results,an optimal combination of the integral SL system was concluded. With the optimal combination,an error of ±10 μm in the horizontal X and Y dimension has been reached by using the integral SL system. The confirmation experimental results show that the dimension accuracy has been significantly improved with the optimal combination.

关 键 词：面曝光快速成形 参数优化 田口方法 

分 类 号：TP391.72[自动化与计算机技术—计算机应用技术] TH16[自动化与计算机技术—计算机科学与技术]