关键词: 增材制造, 区域分割, 填充扫描, 轮廓数据, 3D打印机

Abstract: To solve the filling and scanning problems of complex slicing region in additive manufacturing,a region segmentation and scanning algorithm was proposed.In this method,the region segmentation points in the internal contours and the segmentation intersection points in all contours were identified,and were stored in sequence to update the contour data.The updated contour data was traversed by the proposed searching algorithm of region contour to realize the rapid extraction for individual filling and scanning regions.On this basis,by considering the kinematic characteristics of 3D printing machine,a computing method of optimal scanning direction which had taken the minimum printing time as objective was proposed.The proposed algorithms could segment the complex slicing region which contained complex features such as holes and islands into several continuous printing sub-regions,so that the number of idle motion of printing head was reduced.Combined with the optimized scanning direction,the printing efficiency was improved.The validity of the proposed algorithms was verified by several simulation experiments.

Key words: additive manufacturing, region segmentation, filling and scanning, contour data, 3D printing machine