The Compensation Algorithm of Infiltration Error of the Droplet Injection in 3DP Technique

doi:10.3901/JME.2021.21.269

Abstract

Abstract: In the 3DP process based on microdroplet jetting, the error caused by binder penetration is one of the main factors affecting the accuracy of the printing model. In order to obtain a high-precision printing model and reduce the influence of the infiltration error, the infiltration error should be compensated. For this reason, a compensation algorithm for the permeability error of microdroplet injection process is put forward. The penetration error is decomposed into two components of Z direction and XY direction, and then they were compensated one by one. The compensation method based on point migration is adopted to compensate error component in Z direction infiltration, which ensures the integrity of STL model before and after compensation, simplifies the calculation model, and realizes the high-efficiency compensation of Z direction error. Then, the stratified compensation method based on the stratified plane migration is used to compensate the infiltration error component in XY direction. In the stratification process, the corresponding stratified plane migration is calculated according to the angle characteristics of the triangular surfaces on each layer of the STL model, and the compensation of the infiltration error component in XY direction of the STL model is realized. The experiments verify that the function of infiltration error compensation for STL model can be realized through the calculation of infiltration error component compensation in Z direction and XY direction for the design sample successively. After compensation, the size error and roundness error are significantly reduced. After comprehensive compensation, the sizes of the printed sample are closer to the design sizes, so that their precision is improved.

Key words: 3DP process, infiltration error, error compensation, printing accuracy

CLC Number:

TH164

YANG Weidong, GAO Xiangyu, LIU Weisheng, TAN Runhua, ZHANG Zhengyan. The Compensation Algorithm of Infiltration Error of the Droplet Injection in 3DP Technique[J]. Journal of Mechanical Engineering, 2021, 57(21): 269-278.

References

[1] FADEL G M, KIRSCHMAN C. Accuracy issues in CAD to RP translations[J]. Rapid Prototyping Journal, 1996, 2(2):4-17.
[2] CAO W, MIYAMOTO Y. Direct slicing from AutoCAD solid models for rapid prototyping[J]. International Journal of Advanced Manufacturing Technology, 2003, 21(10-11):739-742.
[3] ROHIT V, SAM A. Image Processing assisted tools for pre-and post-processing operations in additive manufacturing[J]. Procedia Manufacturing, 2016, 5:958-973.
[4] ALLAVARAPU S, PAUL R, ANAND S. A new additive manufacturing file format using bezier patches[J]. Transactions of the North American Manufacturing Research Institution of SME, 2013, 41:580-590.
[5] 陈松茂, 白石根. 基于CAD模型外轮廓线的3D打印自适应分层算法[J]. 华南理工大学学报, 2018, 46(2):38-43. CHEN Songmao, BAI Shigen. Adaptive slicing algorithm based on contour line of CAD model in 3D printing[J]. Journal of South China University of Technology, 2018, 46(2):38-43.
[6] 李娜, 程继红, 杨继全. 3DP分层切片中基于点云射线投影的NURBS曲面切片算法[J]. 机械科学与技术, 2015, 34(2):242-246. LI Na, CHENG Jihong, YANG Jiquan. Research on Ray-NURBS slicing method directly from point cloud for 3DP[J]. Mechanical Science and Technology for Aerospace Engineering, 2015, 34(02):242-246.
[7] 张争艳, 陈萍, 杨丽, 等. 快速成型中粗糙STL模型细分算法[J]. 机械工程学报, 2016, 52(7):178-186. ZHANG ZhengYan, CHEN Ping, YANG Li, et al. The subdivision algorithm of STL model with low precision in rapid prototyping process[J]. Journal of Mechanical Engineering, 2016, 52(7):178-186.
[8] NATHAN B, CRANE. Impact of part thickness and drying conditions on saturation limits in binder jet additive manufacturing[J]. Additive Manufacturing, 2020, 33:101127.
[9] FAYAZFAR H, SALARIAN M, ROGALSKY A, et al. A critical review of powder-based additive manufacturing of ferrous alloys:Process parameters, microstructure and mechanical properties[J]. Materials & Design, 2018, 144:98-128.
[10] HODDER KJ, NYCHKA JA, CHALATURNYK RJ. Process limitations of 3D printing model rock[J]. Progress in Additive Manufacturing, 2018, 3:173-182.
[11] MA X, LIN F. ZHANG L. The heterogeneous compensation for the inﬁltrative error of binder jetting additive manufacturing processes[C]//26th International Solid Freeform Fabrication Symposium. Austin:The University of Texas at Austin, 2015:200-208.
[12] 高翔宇, 杨伟东, 王媛媛, 等. 微滴喷射工艺参数与液滴形态关系的数值模拟[J]. 机械科学与技术, 2021, 40(3):475-480 GAO Xiangyu, YANG Weidong, WANG Yuanyuan, et al. Numerical simulation on the relationship between process parameters of droplet ejection and droplet droplet morphology[J]. Mechanical Science and Technology for Aerospace Engineering, 2021, 40(3):475-480.
[13] GAO X, YANG W, XIAN H, et al. Numerical simulation of multi-layer penetration process of binder droplet in 3DP technique[J]. Computer Modeling in Engineering & Sciences, 2020, 124(1):227-241.
[14] 杨伟东, 牛子佳, 贾鹏飞, 等. 3DP工艺中粘结剂撞击与渗透仿真研究[J]. 河北工业大学学报, 2018, 47(3):53-58. YANG Weidong, NIU Zijia, JIA Pengfei, et al. Simulation research on impact and infiltration of binder in 3DP process[J]. Journal of Hebei University of Technology, 2018, 47(3):53-58.
[15] 马旭龙. 铸造砂型三维打印工艺中渗透误差分析及补偿技术研究[D]. 北京:清华大学, 2016. MA Xulong. The heterogeneous compensation for the infiltrative error of the binder jetting additive manufacturing processes[D]. Beijing:Tsinghua University, 2016.
[16] 徐敬华, 盛红升, 张树有, 等. 基于邻接拓扑的流形网格模型层切多连通域构建方法[J]. 计算机辅助设计与图形学学报, 2018, 30(1):180-190. XU Jinghua, SHENG Hongsheng, ZHANG Shuyou, et al. A method of constructing layered multi-connected domains for manifold mesh model based on adjacency topology[J]. Journal of Computer-Aided Design & Computer Graphics, 2018, 30(1):180-190.
[17] 张应中, 谢馥香, 罗晓芳, 等. 采用半边编码的三角网格拓扑数据结构[J]. 计算机辅助设计与图形学学报, 2016, 28(2):328-334. ZHANG Yingzhong, XIE Fuxiang, LUO Xiaofang, et al. A topological data structure using coding of half-edges for triangle meshes[J]. Journal of Computer-Aided Design & Computer Graphics, 2016, 28(2):328-334.
[18] 王彦云, 陈鸿, 谢明师, 等. 基于哈希表的STL格式文件拓扑重建的算法[J]. 现代制造工程, 2015(12):61-64. WANG Yanyun, CHEN Hong, XIE Mingshi, et al. Algorithm of topological reconstruction for STL format file based on Hash table[J]. Modern Manufacturing Engineering, 2015(12):61-64.
[19] 王增波. STL格式文件的快速拓扑重建算法[J]. 计算机应用, 2014, 34(9):2720-2724. WANG Zengbo. Fast topological reconstruction algorithm for a STL file[J]. Journal of Computer Applications, 2014, 34(9):2720-2724.
[20] 田仁强, 张义飞. 快速成型中STL模型直接切片新算法研究[J]. 机床与液压, 2019, 47(16):55-59. TIAN Renqiang, ZHANG Yifei. A new algorithm for direct slicing of STL model in rapid prototyping[J], Machine Tool & Hydraulics, 2019, 47(16):55-59.
[21] 杨晟院, 杜亚娟, 舒适. 基于STL文件的曲面网格重建算法[J]. 计算机工程, 2011, 37(4):10-11+14. YANG Shengyuana, DU Yajuanb, SHU Shi. Reconstruction algorithm of surface meshes based on STL files[J]. Computer Engineering, 2011, 37(4):10-11+14.
[22] 杨晟院, 舒适. 基于数据相关性的STL曲面网格快速重建算法[J]. 计算机辅助设计与图形学学报, 2009, 21(1):67-71. YANG Shengyuan, SHU Shi. Fast reconstruction of STL surface meshes based on data correlation[J]. Journal of Computer-Aided Design and Computer Graphics, 2009, 21(1):67-71.