The Trial Research on Suppressing the Chatter by Variable Speed Milling

Abstract:

The vibration occurring in cutting process is a very harmful phenomenon, which destroys the surface finish and dimensional integrity of workpieces and quickens the wear of cutting tool. Cutting chatter can be suppressed or reduced by applying the method of suppressing chatter by variable speed cutting. In order to investigate the effect of variable speed parameters and cutting conditions on suppressing the chatter in face milling, the tests have been conducted.The results have shown that cutting with variable spindle speed cutting in face milling will suppress the development of chatter. If chatter occurs in cutting process, the vibration amplitude of variable speed cutting can reduce by 3-6 times lower than that of constant speed cutting, as long as the variable speed parameter are selected suitably.The values of speed variation amplitude Δn/n_o and speed variation frequency f_n of spindle speed trajectory parameter have great effect on suppressing chatter, Δn/n_o = 15- 20% and f_n = 0.4 - 0.5Hz are suitable.

• Periodical: Advanced Materials Research (Volumes 291-294)
• Pages: 2010-2013
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.291-294.2010
• Online since: July 2011
• Authors: Zhi Jian Gou
• Keywords: Chatter Supression, Milling, Time – The Varying Spindle Speed

References

[1] Sexton J. S. ,Stone B. J. : The stability Of machining with continuously varying spindle speed. Annals of the CIRP, 1978 27(1), p.321

[2] 4 Smith S.,Tlusty J. : Stability Chatter by Automatic Spindle Speed Regulation, Annals of CIRP, 1992, 4(1), p.436

DOI: 10.1016/s0007-8506(07)61238-4

[3] Sexton J. S. , Stone B. J. . :A Stability Analysis of Single—Point Machining with Varying Spindle Speed. Appl. Math. Modeling, 1977, p.310

DOI: 10.1016/0307-904x(77)90062-2

[4] Shinichi OHNO, Toshihiro ARAI. On the Relation between the Fluctuation of the Rotational Speed of the Workpiece and the Fluctuation of the Frequency of the Self—Excited Machine Tool Vbration. Bulletin of the JSME. , 1979, 22(172), P.1479

DOI: 10.1299/jsme1958.22.1479

[5] Sexton J.S. , Stone B. J. . : An lnvestigation Of the Transient Effects During Variable Spindle Cutting, J. of Mech. Eng. Science. 1980, P.107

[6] Yunyi Y. , Zheng W. B. , Bao S. F. . : Study Of Controlling Chatter in Machining Operations with On-line Adjusting Feed Rate. IXth ICPR, August l7-20, 1987, B 105-110(in chinese)

[7] Olbich., Fu R. J., Bray H. J. and Devor R. E. . : Study of a Control with Varying Spindle Speed in Face Miling, Proc. of the 13th North American Manufcturing Res. Conf. ,1985, P.567

[8] Stone B. J. , The Effect of Time Varying Parameters On the Build-up of Chatter in Turning， Annals of The CIRP.1985, 34(1),P. 37l

DOI: 10.1016/s0007-8506(07)61792-2

[9] Zhijian G., Junyi Y. and Zhanhui Y. : Stability Analysis of Variable Speed Milling Systerm. Journal of Chongqing University (Natural Science Edition). Vol.22(1999), P. 108(in chinese)