Free-Form Surface Five-Axis Machining Tool Path and Tool Posture Simultaneous Multi-Objective Optimization Theory Research

Abstract:

In view of all sorts of questions existing in CNC machining, such as machining vibration, so proposed a new simultaneous multi-objective optimization algorithm on free-form surface five-axis machining tool path and tool posture based on constant scallop height. In the algorithm, we first complete the surface fitting on the base of feature points obtained. Secondly calculate principal curvatures of the surface, select tools, and at the same time generate tool axis vector in the current cutter-contact point tool axis. Once again get the maximum spacing and surface curvature in accordance with the tool effective cutting radius, discrete into cutter-contact point, and calculate the cutting depth to adjust the machine feed rate. And finally connect adjacent curve path using the diagonal to achieve a continuous cutting scallop height tool path. This algorithm can achieve the goals such as the same precision, improving processing efficiency, reducing the number of tool cutting in and out, reducing cutting vibration and tool wear and so on. That is the algorithm can achieve simultaneous multi-objective optimization of the free-form surface NC machining finally.

• Periodical: Key Engineering Materials (Volumes 467-469)
• Pages: 900-905
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.467-469.900
• Online since: February 2011
• Authors: Shu Kun Cao, Li Song, Kai Feng Song, Jie Lv, Xiu Sheng Chen
• Keywords: CNC Machining, Constant Power, Constant Scallop Height, Freeform Surfaces, Path Optimization

References

[1] Shi Fazhong, On certain integrals of Lipschitz-Hankel type involving products of Bessel functions, Beijing: Beihang University Press, (1994).

[2] Liu Yazhen, Research on feasible tool computation of NC machining for NURBS surface, Master's Thesis, (2005).

[3] Wu Baohai, Li Shan, Zhang Dinghua and Wang Shangji, Study on 5-axis End Milling of Free-form Surface, Chinese Mechanical Engineering, vol. 18, No. 10, p.1135–1139, June (2007).

[4] Liu Xiongwei, Title of paper with only first word capitalized, Beijing: Machinery Industry Press, (2001).

[5] Caoshukun, and Songli, Research on Path Optimization Technology for Free-form Surface Five-axis NC Machining, International Coferengce on Intellectual Technique in Industrial Practice, September (2010).