Conversion method study from cutter-location points to nonuniform rational B-spline toolpath NC file for high-speed machining
Conversion method study from cutter-location points to nonuniform rational B-spline toolpath NC file for high-speed machining
复制标题
高速加工刀位点到非均匀有理B样条刀具路径NC文件转换方法研究
DOI：
10.1177/0954406218762018
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Su Wei-wei
中科院分区：
文献类型：
--
作者：
Ma Jian-wei;Song De-ning;Jia Zhen-yuan;Hu Guo-qing;Su Wei-wei
复杂曲面零件应用广泛，对此类复杂零件的加工质量和加工效率的要求越来越高。为了实现高速、高质量的加工，非均匀有理B样条插值被广泛研究，并被证明具有传统直线或圆弧插补所不能比拟的上级优势。然而，非均匀有理B样条刀具路径NC文件不能直接从计算机辅助设计（CAD）模型通过使用商业计算机辅助制造（CAM）软件生成。针对这一问题，提出了一种将刀位点数据转换为非均匀有理B样条刀位轨迹数控文件的方法。为了避免刀位曲线在尖角处拟合效果不佳的问题，同时减少计算量，提出了刀位数据的预处理方法，包括数据分割和数据简化。然后，采用最小二乘法对非均匀有理B样条曲线进行刀位拟合，提出了一种线性/非均匀有理B样条混合刀位轨迹的迭代拟合方法。最后，设计了一个用户界面，用于显示拟合结果和输出非均匀有理B样条刀轨的NC文件。该方法利用非均匀有理B样条曲线，可生成复杂曲面零件高速加工的非均匀有理B样条与线性刀轨混合插补数控程序。实验结果证明了该方法的可行性和优越性。
Parts with complex curved surfaces are widely applied and the demands for the machining quality and the machining efficiency of such complex parts become increasingly higher. In order to realize high-speed and high-quality machining, the nonuniform rational B-spline interpolator is widely researched and demonstrated to be superior to the conventional linear or circular interpolators. However, the nonuniform rational B-spline toolpath NC files cannot be directly generated from the computer-aided design (CAD) models by using commercial computer-aided manufacturing (CAM) software. To deal with this problem, a conversion method from the cutter-location points to the nonuniform rational B-spline toolpath numerical control (NC) file is presented. To avoid the bad curve-fitting effect at sharp corners of the toolpath and to meanwhile reduce the computational burden, the cutter-location pre-processing method, consisting data segmentation and data simplification, is provided first. Then, the least-square method is employed to fit the cutter locations to the nonuniform rational B-spline curves, and an iterative fitting approach is proposed for linear/nonuniform rational B-spline hybrid toolpath generation. Finally, a user interface is designed for displaying the fitting results and outputting the NC file with nonuniform rational B-spline toolpaths. By using this method, nonuniform rational B-spline and linear toolpaths hybrid interpolation NC program can be generated for the high-speed machining of complex curved surface parts with the utilization of the nonuniform rational B-spline interpolator. The experimental results demonstrate the feasibility and the advantages of the presented method.
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影响因子：
10.4
作者：
Yuan-Lung Lai
通讯作者：
Yuan-Lung Lai
DOI：
10.1016/j.cie.2014.12.018
发表时间：
2015-03
期刊：
Comput. Ind. Eng.
影响因子：
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作者：
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影响因子：
3.7
作者：
Dung VT;Tjahjowidodo T
通讯作者：
Tjahjowidodo T
DOI：
10.1007/s00170-007-1271-x
发表时间：
2008-11
期刊：
The International Journal of Advanced Manufacturing Technology
影响因子：
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作者：
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通讯作者：
K. Lin;Wen-Der Ueng;J. Lai