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| 非对称凸起模型特征分割及其在FDM分层上的应用 |
| Feature Segmentation of Asymmetrical Raised Models and Their Application to FDM Stratification |
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| DOI：10.3969/j.issn.1674-6457.2023.03.022 |
| 中文关键词: 熔融沉积成型 凸起类模型 特征分割 自适应分层 路径分段 成型效率 |
| 英文关键词: fused deposition molding raised class model feature segmentation adaptive layering path segmentation molding efficiency |
| 基金项目:包头市科技计划(2019Z3004–6) |
| Author Name | Affiliation | | WANG Chun-xiang | School of Mechanical Engineering, Inner Mongolia University of Science and Technology, Inner Mongolia Baotou 014000, China | | WANG Qi-chao | School of Mechanical Engineering, Inner Mongolia University of Science and Technology, Inner Mongolia Baotou 014000, China | | YIN Jin-lin | School of Mechanical Engineering, Inner Mongolia University of Science and Technology, Inner Mongolia Baotou 014000, China | | PAN Yi-cheng | School of Mechanical Engineering, Inner Mongolia University of Science and Technology, Inner Mongolia Baotou 014000, China |
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| 中文摘要: |
| 目的 以熔融沉积成型(FDM)的非对称多突起类模型为研究对象，通过改进分层算法提升模型3D打印效率并降低模型表面粗糙度。方法 通过切片分层算法，输入STL格式的模型文件，利用面片模型的信息储存特点，将模型凸起区域分割，并将分割后的模型凸起特征单独提取。以面片法向量与z轴的夹角为判据，对各部分模型进行自适应分层，然后调整打印路径，对各个部分的打印路径进行分段式优化，确定分段路径的打印次序，并输出3D打印机执行代码，完成实物制造。结果 对于实验所采用的汽车转向节模型，算法能够精确地分割提取模型的凸起特征区域。通过分层模型和实物打印的对比，相较于传统算法，新算法在保证尖端高度为0.005 mm的前提下，实现了模型分层更加精确的效果，并且整个打印过程中，喷头在凸起特征之间的空行程次数减少了93.42%，打印效率提升了28.09%。结论 对于非对称凸起模型熔融沉积工艺的3D打印，新的切片算法能减弱模型的阶梯效应和拉丝现象，极大地减少喷头空行程次数，从而提升打印效率并降低模型的表面粗糙度。 |
| 英文摘要: |
| The work aims to improve the model 3D printing efficiency and reduce the surface roughness of the model by improving the layering algorithm with the asymmetric multi-raised model of fused deposition modeling (FDM) as the research object. Through the slice layering algorithm, the model file in STL format was input, and the raised area of the model was divided through the information storage characteristics of the patch model, and the raised features of the segmented model were extracted separately. With the angle between the patch normal vector and the z-axis as the criterion, the adaptive layering of each part of the model was carried out. And then the printing path was adjusted. The printing path of each part was optimized in segments. The printing order of the segment path was determined. And the 3D printer execution code was output to complete physical manufacturing. For the automobile steering knuckle model used in the experiment, the algorithm can accurately segment and extract the raised feature area of the model. Through the comparison of layered model and physical printing, compared with the traditional algorithm, the new algorithm realized more accurate layering of the model under the premise of ensuring that the tip height of 0.005 mm, and the number of idle running between the raised features of the nozzle was reduced by 93.42% during the whole printing process, and the printing efficiency was improved by 28.09%. For the 3D printing of the asymmetric raised model fused deposition process, the new slicing algorithm weakens the step effect and wire drawing phenomenon of the model, and greatly reduces the idle running of the nozzle, thereby improving the printing efficiency and reducing the surface roughness of the model. |
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