复杂曲面零件五轴加工刀轴整体优化方法

doi:10.7527/S1000-6893.2013.0242

Abstract

Abstract:

Dramatic change of tool orientation during a five-axis machining process of sculptured surfaces affects the machining quality seriously. To solve the problem, a global tool orientation optimization method for five-axis machining is proposed based on critical constraints. Firstly, all the feasible swing planes according to the cutter contact points are constructed. Based on the critical constraints, critical tool orientations are obtained in the swing planes, and then the initial feasible tool orientation region is established with planar mapping. Secondly, by evenly discretizing the initial feasible region, an adjacency matrix is constructed according to the relative position relationship of the discrete points. Together with the shortest path algorithm, the initial reference tool orientation is calculated and then a new feasible region is obtained. Finally, the optimization model for tool orientation is established, which guarantees an interference-free current tool path as well as the smallest change between adjacent tool orientations. This method can realize the smooth control of tool orientation for five-axis machining of free-form surfaces without interference. Analysis of two different kinds of impellers with sculptured surfaces demonstrates that the tool orientation obtained by the proposed method can improve the movement performance of machine tools significantly, and the tool interference can be avoided. This method can thus improve the machining efficiency and quality of parts with complicated curvatures.

Key words: sculptured surface, critical constraint, tool orientation optimization, 5-axis machining, machine tools

CLC Number:

V261
TP391.7

WANG Jing, ZHANG Dinghua, LUO Ming, WU Baohai. A Global Tool Orientation Optimization Method for Five-axis CNC Machining of Sculptured Surfaces[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2013, 34(6): 1452-1462.

References

[1] Ho M C, Hwang Y R, Hu C H. Five-axis tool orientation smoothing using quaternion interpolation algorithm. International Journal of Machine Tool & Manufacture, 2003, 43 (12):1259-1267.

[2] Wang N, Tang K. Automatic generation of gouge-free and angular velocity-compliant five-axis tool path. Computer-Aided Design, 2007, 39(10): 841-852.

[3] Wang Q H, Li J R, Gong H Q. Graphics-assisted cutter orientation correction for collision-free five-axis machining. International Journal of Production Research, 2007, 45(13): 2875-2894.

[4] Kersting P, Zabel A. Optimizing NC-tool paths for simultaneous five-axis milling based on multi-population multi-objective evolutionary algorithms. Advances in Engineering Software, 2009, 40(6): 452-463.

[5] Luo M, Zhang D H, Wu B H, et al. Tool orientation control using quaternion interpolation in multi-axis milling of blade. Proceedings of the International Conference on Manufacturing Automation 2010. HongKong, 2010.

[6] Bi Q Z, Wang Y H, Zhu L M, et al. Wholly smoothing cutter orientations for five-axis NC machining based on cutter contact point mesh. Science China: Technological Sciences, 2010, 40(10): 1159-1168. (in Chinese) 毕庆贞, 王宇晗, 朱利民, 等. 刀触点网格上整体光顺五轴数控加工刀轴方向的模型与算法. 中国科学: 技术科学, 2010, 40(10): 1159-1168.

[7] Morishige K, Takeuchi Y, Kase K. Tool path generation using C-space for 5-axis control machining. Journal of Manufacturing Science and Engineering, 1999, 121(1): 144-149.

[8] Yin Z P, Ding H, Xiong Y L. Accessibility analysis algorithm and application based on visibility cone. Science China: Technological Sciences, 2003, 33(11): 979-988. (in Chinese) 尹周平, 丁汉, 熊有伦. 基于可视锥的可接近性分析方法及其应用. 中国科学: 技术科学, 2003, 33(11): 979-988.

[9] Balasubramaniam M, Laxmiprasad P, Sarma S, et al. Generating 5-axis NC roughing paths directly from a tessellated representation. Computer-Aided Design, 2000, 32(4): 261-277.

[10] Balasubramaniam M, Sarma S E, Marciniak K. Collision-free finishing toolpaths from visibility data. Computer-Aided Design, 2003, 35(4): 359-374.

[11] Bi Q Z, Wang Y H, Ding H. A GPU-based algorithm for generating collision-free and orientation-smooth five-axis finishing tool paths of a ball-end cutter. International Journal of Production Research, 2010, 48(4): 1105-1124.

[12] Jun C S, Cha K, Lee Y S. Optimizing tool orientations for 5-axis machining by configuration-space search method. Computer-Aided Design, 2003, 35(6): 549-566.

[13] Castagnetti C, Duc E, Ray P. The domain of admissible orientation concept: a new method for five-axis tool path optimization. Computer-Aided Design, 2008, 40(9):938-950.

[14] Zhang D H. Study on the theory, method and interface for multi-axis NC programming system. Xi'an: School of Mechanical Engineering, Northwestern Polytechnical University, 1989. (in Chinese) 张定华. 多轴NC编程系统的理论、方法和接口研究. 西安: 西北工业大学机电学院, 1989.

[15] Wang J, Zhang D H, Wu B H, et al. Tool orientation optimization method in four-axis CNC machining based on critical contrains. Journal of Mechanical Engineering, 2012, 48(17): 114-120.(in Chinese) 王晶, 张定华, 吴宝海, 等. 基于临界约束的四轴数控加工刀轴优化方法. 机械工程学报, 2012, 48(17): 114-120.

[16] Luo M. Research on dynamic modeling of low-rigidity process system and controlling of machining processes. Xi'an: School of Mechanical Engineering, Northwestern Polytechnical University, 2012. (in Chinese) 罗明. 弱刚性工艺系统动力学建模与加工过程控制研究. 西安: 西北工业大学机电学院, 2012.

[17] Ding H, Zhu L M. Geometric theories and methods for digital manufacturing of complex surfaces. Beijing: Science Press, 2011: 341-346. (in Chinese) 丁汉, 朱利民. 复杂曲面数字化制造的几何学理论和方法. 北京: 科学出版社,2011: 341-346.

A Global Tool Orientation Optimization Method for Five-axis CNC Machining of Sculptured Surfaces

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