潘科峰,孔令旺,赵刚.孔洞特征模型特征分割及自适应分层算法[J].精密成形工程,2023,15(12):217-224.
PAN Ke-feng,KONG Ling-wang,ZHAO Gang.Feature Segmentation and Adaptive Slicing Algorithm of Hole Feature Model[J].Journal of Netshape Forming Engineering,2023,15(12):217-224. |
| 孔洞特征模型特征分割及自适应分层算法 |
| Feature Segmentation and Adaptive Slicing Algorithm of Hole Feature Model |
| 投稿时间：2023-05-11 |
| DOI：10.3969/j.issn.1674-6457.2023.12.026 |
| 中文关键词: 3D打印 孔洞特征模型，特征分割 自适应分层 成形精度 成形效率 |
| 英文关键词: 3D printing pore feature model feature segmentation adaptive slicing forming accuracy molding efficiency |
| 基金项目:国家自然科学基金(62076109) |
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| 中文摘要: |
| 目的 针对传统整体式3D打印分层算法对孔洞特征模型分层处理时层厚不够合理、难以较好平衡成形精度和成形效率等问题，通过改进分层算法，实现了孔洞特征模型3D打印成形精度和成形效率的提升。方法 首先确定模型上下水平面区域，剔除该区域的三角面片，使孔洞特征三角面片与其他部分处于非邻接状态，其次通过建立三角面片拓扑结构，将模型孔洞特征包含的三角面分离，最后以当前层相交三角面片法向量与z轴最小夹角为层厚判据，分别对模型孔洞特征及其他部分进行自适应分层，并将模型各部分分层路径整合，形成完整的模型3D打印机执行代码。结果 示例模型分层模拟及实际打印结果表明，对于实验所用的螺母模型和拇指轮模型，与三角面片法向量自适应分层算法相比，所提算法的模型成形精度分别提升了20.18%和62.68%，打印耗时分别缩短了34 min和11 min。结论 对于孔洞特征模型，采用分离模型孔洞特征与单独自适应分层的策略，能够较好地提升模型成形精度，并且缩短模型成形时间。 |
| 英文摘要: |
| In view of the problems that the traditional integral 3D printing slicing algorithm does not have reasonable layer thickness for the hole feature model slicing, and it is difficult to balance the molding accuracy and molding efficiency, the work aims to improve the forming accuracy and molding efficiency of the hole feature model 3D printing by improving the slicing algorithm. The upper and lower horizontal surface areas of the model were determined. The triangular patch in this area was removed. The hole feature triangular patch and other parts were kept in a non-adjacent state. Then the triangular surface contained in the model hole feature was separated through the established triangular patch topology. And finally the model hole features and other parts were adaptively sliced according to the layer thickness criterion of the normal vector of the triangular patch that intersected the current layer and the minimum angle of axis z. The slicing paths of each part of the model were integrated to form a complete model 3D printer execution code. Through the slicing simulation of the example model and the actual printing results, for the nut model and thumb wheel model used in the experiment, the model forming accuracy was improved by 20.18% and 62.68%, and the printing time was reduced by 34 min and 11 min, respectively, compared with the triangular patch normal vector adaptive slicing algorithm. For the pore feature model, the strategy of separating the pore features of the model and adaptive slicing separately can improve the model forming accuracy and reduce the model molding time. |
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