【摘要】 针对光固化立体造型技术中因层间收缩力所引起的原型翘曲变形问题 ,深入研究了激光功率、扫描速度、扫描间距等因素对固化深度、固化线宽的影响 ,并在此基础上实现了二次曝光法 .利用分区域、变速度扫描等方法对传统的二次曝光法进行了改进 ,提出了改进的二次曝光法 .实验证明 ,改进的二次曝光法不仅可以减小原型的翘曲变形 ,而且还消除了传统二次曝光法的层间错位缺陷 ,从而提高了原型的制作精度更多还原

【Abstract】 The warpage is dominated by laser scanning strategy to a great extent and it is a key factor leading to the loss of part accuracy in SL process. Based on the study of the affections on cure depth and cure width by the power of laser, scanning velocity and gap, the double exposal method has been used in an experiment. Moreover, the traditional method has been improved by subdividing scanning with various speeds and an improved double exposal method is proposed. It is tested that the improved method can not only reduce the warpage, but also ensure the accuracy of the prototype.更多还原