Nonequivalent Milling of Roller Gear Cams Based on Approximation Method of Offset Surface

Abstract:

The roller gear cam surface is manufactured with nonequivalent milling method in many cases, by which the machining error is unavoidable. In order to simplify the tool position, we can transform one problem approximating the designed surface with the tool envelope surface to another problem approaching the theoretical tool axis trajectory surface with the actual one. Furthermore, the theoretical tool axis trajectory surface, which is an offset surface of the designed cam surface, is reconstructed by the NURBS ruled surface. In order to find the best tool axis vector to minimize the machining error, a simple least square approximation method is established to figure out all the control points of the NURBS tool axis trajectory surface. A numerical calculation and simulation example is described to verify the effectiveness of the tool position method proposed in the paper.

• Periodical: Advanced Materials Research (Volumes 97-101)
• Pages: 1998-2001
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.97-101.1998
• Online since: March 2010
• Authors: Rong Yu Ge, Xian Ying Feng, Pei Quan Guo
• Keywords: Approximation, Nonequivalent Milling, Non-Uniform Rational B-Spline (NURBS), Offset Surface, Roller Gear Cam

References

[1] R.Y. Ge, X.Y. Feng and P.Q. Guo: The 2009 International Conference On Information, Electronic and Computer Science (World Academic Union Press, China 2009).

[2] M. Nishioka: Transactions of the Japan Society of Mechanical Engineers 69-C, Vol. 562 (2003), p.3403 (In Japanese).

[3] Y.T. Zhang and M.F. Yin: Chinese Journal of Mechanical Engineering, Vol. 10 (1997), p.176.

[4] H. Gong, L.X. Cao and J. Liu: Computer-Aided Design, Vol. 37 (2005), p.1205.

[5] Y.W. Sun, H.J. Wu and J. Liu: Chinese Journal of Mechanical Engineering, Vol. 40 (2004), p.10 (In Chinese).