关键词: 增材制造, 偏置路径, 图形处理器, 体素化

Abstract: To improve the calculate efficiency,avoid mutual-intersection and self-intersection in additive manufacturing process,a voxel-based contour offsetting algorithm was proposed.The image structure for slice model was constructed,and the index of intersections was recorded to realize information inheritance.The Graphics Process Unit (GPU) multi-threading was used to perform contour filling and offset operations in parallel.When the information was restored to the vector graphics structure,the index of intersections was used to reduce the amount of data in the calculation results,so as to realize the GPU parallelization of the model.The experimental results showed that the proposed algorithm improved the processing efficiency compared with the existing algorithm,and could avoid the problem of contour intersection,especially suit for contour offsetting of complex models.

Key words: additive manufacturing, offset path, graphics process unit, voxelization