增材制造中STL模型的自适应分层算法研究
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摘要
增材制造技术是一种先进的智能加工技术,并且通过其制造原理"分层—叠加"来加工实体。为了满足增材制造成型实体阶梯误差的要求,提出一种基于STL三角形网格法向量的自适应分层算法。首先根据三维实体成型后出现正、负偏差原理,得到统一正偏差截面轮廓的选择方法;其次以阶梯效应为依据,根据三角形网格法向量以及所允许的阶梯高度,确定自适应分层的分层厚度;最后对该算法进行实例验证。结果表明该算法符合自适应分层的要求,可有效减少阶梯效应并使得后处理工序更为方便。
Additive Manufacturing Technology is an advanced and intelligent manufacturing technology,and its principle to fabricate entities is"slicing and adding". In order to satisfy the requirement of staircase error of the entities acquired by Additive Manufacturing,an adaptive slicing algorithm based on the vector of STL triangular grid is proposed. Firstly according to the principle of the positive and negative error in the entity a method is proposed to decide the cross section contour of a STL data model;then under the staircase effect,the adaptive slicing thickness is calculated which is determined by the normal vector of triangular meshes and the allowable staircase error;lastly,an example was proposed to verified the algorithm. The results showed that this algorithm can satisfy the requirements of adaptive slicing algorithm and the staircase effect is decreased effectively,it also can provide convenience for post-processing.
Additive Manufacturing Technology is an advanced and intelligent manufacturing technology,and its principle to fabricate entities is"slicing and adding". In order to satisfy the requirement of staircase error of the entities acquired by Additive Manufacturing,an adaptive slicing algorithm based on the vector of STL triangular grid is proposed. Firstly according to the principle of the positive and negative error in the entity a method is proposed to decide the cross section contour of a STL data model;then under the staircase effect,the adaptive slicing thickness is calculated which is determined by the normal vector of triangular meshes and the allowable staircase error;lastly,an example was proposed to verified the algorithm. The results showed that this algorithm can satisfy the requirements of adaptive slicing algorithm and the staircase effect is decreased effectively,it also can provide convenience for post-processing.
引文
[1]卢秉恒,李涤尘.增材制造技术发展[J].机械制造与自动化,2013,42(4):2-3.(Lu Bing-heng,Li Di-chen.Development of the additive manufacturing(3D printing)technology[J].Machine Building&Automation,2013,42(4):2-3.)
[2]王春香,郝志博.快速成型技术STL模型等厚度分层算法研究[J].机械设计与制造,2014(4):133-136(Wang Chun-xiang,Hao Zhi-bo.The uniform thickness hierarchical algorithm of rapid prototyping technology STL model[J].Machinery Design&Manufacture,2014(4):133-136.)
[3]Prashant Kulkarni,Debasish Dutta.An accurate slicing procedure for layered manufacturing[J].Computer-Aided Design,1996,28(9):683-697.
[4]陈昆,潘小帝,陈定方.一种快速成型自适应分层算法[J].武汉理工大学学报:交通科学与工程版,2014,38(3):547-551(Chen Kun,Pan Xiao-di,Chen Ding-fang.An adaptive slicing algorithm of rapid prototyping[J].Journal of Wuhan University of Technology:Transportation Science&Engineering,2014,38(3):547-551.)
[5]李文康,陈长波,吴文渊.有效保留模型特征的自适应分层算法[J].计算机应用,2015,35(8):2295-2300.(Li Wen-kang,Chen Chang-bo,Wu Wen-yuan.Adaptive slicing algorithm to retain model characteristics[J].Journal of Computer Applications,2015,35(8):2295-2300.)
[6]A.Dolenc,I.Makela.Slicing procedures for layered manufacturing techniques[J].Computer Aided Design,1994,26(2):119-126.
[7]Wang S,Wang Y,Chen C.An adaptive slicing algorithm and data format for functionally graded material objects[J].The International Journal of Advanced Manufacturing Technology,2013,65(1):251-258.
[8]Zhang Z,Joshi S.An improved slicing algorithm with efficient contour construction using STL files[J].The International Journal of Advanced Manufacturing Technology,2015,80(5):1347-1362.
[9]Dutta P K A D.An accurate slicing procedure for layered manufacturing[J].Computer-Aided Design,1996,28(9):683-697.
[10]W.Rattanawong,S.H.Masood,P.lovenitti.A volumetric approach to partbuild orientations in rapid prototyping[J].Journal of Materials Processing Technology,2001,119(1):348-353.
[2]王春香,郝志博.快速成型技术STL模型等厚度分层算法研究[J].机械设计与制造,2014(4):133-136(Wang Chun-xiang,Hao Zhi-bo.The uniform thickness hierarchical algorithm of rapid prototyping technology STL model[J].Machinery Design&Manufacture,2014(4):133-136.)
[3]Prashant Kulkarni,Debasish Dutta.An accurate slicing procedure for layered manufacturing[J].Computer-Aided Design,1996,28(9):683-697.
[4]陈昆,潘小帝,陈定方.一种快速成型自适应分层算法[J].武汉理工大学学报:交通科学与工程版,2014,38(3):547-551(Chen Kun,Pan Xiao-di,Chen Ding-fang.An adaptive slicing algorithm of rapid prototyping[J].Journal of Wuhan University of Technology:Transportation Science&Engineering,2014,38(3):547-551.)
[5]李文康,陈长波,吴文渊.有效保留模型特征的自适应分层算法[J].计算机应用,2015,35(8):2295-2300.(Li Wen-kang,Chen Chang-bo,Wu Wen-yuan.Adaptive slicing algorithm to retain model characteristics[J].Journal of Computer Applications,2015,35(8):2295-2300.)
[6]A.Dolenc,I.Makela.Slicing procedures for layered manufacturing techniques[J].Computer Aided Design,1994,26(2):119-126.
[7]Wang S,Wang Y,Chen C.An adaptive slicing algorithm and data format for functionally graded material objects[J].The International Journal of Advanced Manufacturing Technology,2013,65(1):251-258.
[8]Zhang Z,Joshi S.An improved slicing algorithm with efficient contour construction using STL files[J].The International Journal of Advanced Manufacturing Technology,2015,80(5):1347-1362.
[9]Dutta P K A D.An accurate slicing procedure for layered manufacturing[J].Computer-Aided Design,1996,28(9):683-697.
[10]W.Rattanawong,S.H.Masood,P.lovenitti.A volumetric approach to partbuild orientations in rapid prototyping[J].Journal of Materials Processing Technology,2001,119(1):348-353.