The Impact of Different Axial Oil Chamber Design on Hydrostatic Spindle

Abstract:

High-precision machining and large-scale tool are the most primary development trend of current machine tool and hydrostatic products are key technologies of high-precision machining equipments. However, these equipments mostly process miniature components, thus the adopted tools are relatively small and the spindles mainly use are mainly built-in types of HSK32 to HSK25 with revolutions speed over 25,000rpm. Some processing equipments are even equipped with hydrostatic or gas-static spindles. The study extends the axial oil chamber to radial ones to expand the action area of axial oil pressure and form a closed oil seal edge by combining the radial clearance. Consequently, the axial bearing stiffness can be enhanced to enlarge the application scope of hydrostatic spindle. The design mode can enhance axial stiffness of spindle modules or strengthen the stiffness of hydrostatic spindle in a ball screw.

• Periodical: Applied Mechanics and Materials (Volumes 789-790)
• Pages: 296-299
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.789-790.296
• Online since: September 2015
• Authors: Shao Hsien Chen*, Shang Te Chen, Chien Cheng Hsu
• Keywords: Hydrostatic Spindle, Oil Chamber

References

[1] A. A. Raimondi and J. Boyd , An Analysis of Orifice and Capillary Compensated Hydrostatic JournalBearing, Journal of the American Society of Lubrication Engineering, Vol. 13, pp.29-37, (1957).

[2] J. P. O'Donoghue, W. B. Rowe, and C. J. Hooke, Design of Hydrostatic Using an Operating Parameter, Wear, Vol. 14, pp.355-362, (1969).

DOI: 10.1016/0043-1648(69)90016-7

[3] B. Ghosh, An Exact Analysis of a Hydrostatic Journal Bearing with aLarge Circumferential Sill, Wear, Vol. 23, pp.377-386, (1972).

[4] Kang, Y., Chen, C. -H., Lee, H. -H., Hung, Y. -H., and Hsiao, S. -T., Design for Static Stiffness of Hydrostatic Bearings: Single-action Variable Compensations, ,. (will be included in Issue 2, Indus Lub Tribol, in 2011).

DOI: 10.1108/00368791111112225

[5] Patent US5462364, Application Method of Variable Velocity Bearing.

[6] Patent US5921731, High Speed Hydrostatic Spindle.

[7] Patent US6367977, HYBRID HYDROSTATIC SPINDLE.

[8] Shun-Te Hsiao, The Infinite Stiffness Characteristics Analysis of Hydrostatic Conical Bearings, Vol. 22, No. 2, July 2011, JOURNAL OF Lee-Ming Institute Of Technology.

[9] Sun Kungshou, Feng Ming, Design for Fluid Hydro-hybrid Bearing, World Publishing Corporation, (1993).

[10] Chen Shangte, Analysis on Hydrostatic Bearing Development Trend from the Current Situation of Hydrostatic Patents, Journal of the Mechatronic Industry.

[11] Weck M, Koch A. Spindle-BearingsSystems for High-Speed Applications inMachine Tools. Annals of the CIRP. 1993; 42: 445-448.

DOI: 10.1016/s0007-8506(07)62482-2

[12] Hale L, Donaldson R., Castro C, Chung C, Hopkins J. Development of a hydrostaticjournal bearing with slit-step compensation. Proceedings of the American Society forPrecision Engineering. 2006 Oct; 272-275.

[13] Y. S. Chen, Y. D. Cheng, and C. C. Chiou , The Critical Speeds Of a Machine Tool Spindle Bearing System With The High Stiffness Hydrostatics Journal Bearings, Department of Mechanical Engineering Yuan-Ze University Chungli, Taoyuan, Taiwan.

DOI: 10.20965/jaciii.2007.p0396