Velocity Characteristics of the Wheel in Grinding Axisymmetric Aspheric with AEGM

Abstract:

It is an important method to machine revolution aspheric with Arc Envelope Grinding Method（AEGM）. CNC system controls the feed rate of the arc center of the end of the wheel in grinding, Disk-shaped grinding wheel processing curve (ie, cross-section curve of rotary aspheric) and motion curve of the arc center of the wheel are equidistant curves each other . Based on the analysis of the angular velocity (ω) of the grinding point, the relationship between the feed rate of the arc of the wheel (υ0) and the feed rate of the grinding point (υ) is analyzed, the feed rate and the angular velocity of the grind point is discussed when the eccentricity of the meridional cross-section curve take different values. The results show: 1) the feed rate of the grinding pointυ=υ0±ωr; 2)ω is changing in grinding, When the caliber of axisymmetric aspheric (ie, z value) is small, ω will change slowly, otherwise, ω will change rapidly when the caliber of axisymmetric aspheric is large; 3) the ratio of υ/υ0 will change with the z-axis coordinate changes. υ/υ0is larger when the caliber of axisymmetric aspheric is smaller. By analyzing ,υ/υ0 and other parameters, the motion law of the wheel is obtained, which will provide confirm base for optimizing feed rate in grinding and improve the precision of grinding.

• Periodical: Advanced Materials Research (Volumes 472-475)
• Pages: 921-926
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.472-475.921
• Online since: February 2012
• Authors: Xu Guang Zhou, Qiu Sheng Yan, Guang Li Zhu, Ling Ye Kong
• Keywords: Arc Envelope Grinding Method, Aspheric, Equidistant Curves, Grinding Point

References

[1] T. Kuriyagawa, M. S. S. Zahmaty, K. Syoji. A new grinding method for aspheric ceramic mirrors. Journal of Materials Technology, 62 (1996) 387-392

DOI: 10.1016/s0924-0136(96)02440-5

[2] T. Kuriyagawa, T. Tachibana, K. Syoji, Y. Mori. Nonaxisymmetric aspheric ceramic mirror machining using arc envelope grinding method. Journal of The JSME(C) 63 (1997) 611:2532-2537

DOI: 10.1299/kikaic.63.2532

[3] Xie Jin, Zhu Guangyu. CNC Precision Grinding Method for Free-form Surfaces of Injection Mould Core，China Mechanical Engineering，2006(10)

[4] Xie Jin, Ruan Zhao-wu，Mirror form grinding of free-form surface of reflector mould core，Optics and Precision Engineering，2007，Vol. 15, No.3

[5] Yan Q.,Lin B., Zhang Z.. Analyses of cusp on free-from surface using arc envelope machining method. Journal of Tianjin University, 34 (2001) 5:619-622

[6] Q.S. Yan.,etc., A New Grinding Method for Large-scale Surface of Revolution and Error Analyzing of Its Wheel Dressing，Key Engineering Materials，Vol. 329 (2007) pp.111-116

DOI: 10.4028/www.scientific.net/kem.329.111

[7] Syoji Katsuo, Guo Yinbiao,etc., Grinding Technology，Beijing: China Machine Press，2007.9 (in Chinese)

[8] Pan Junhua, The design, manufacture and test of the aspherical optical surfaces，SuZhou：Suzhou University Press，2004.12 (in Chinese)