Dynamic characteristics of spindle with water-lubricated hydrostatic bearings for ultra-precision machine tools

2020 ◽  
Vol 63 ◽  
pp. 187-196 ◽  
Author(s):  
Dmytro Fedorynenko ◽  
Rei Kirigaya ◽  
Yohichi Nakao
Keyword(s):  
Dynamic Characteristics ◽  
Machine Tools ◽  
Precision Machine ◽  
Hydrostatic Bearings ◽  
Ultra Precision ◽  
Precision Machine Tools

C32 Dynamic characteristics of ultra-precision machine tools

2012 ◽  
Vol 2012.9 (0) ◽  
pp. 179-180
Author(s):  
Yoshiaki KAI ◽  
Masahiko FUKUTA ◽  
Atsushi MATSUBARA
Keyword(s):  
Dynamic Characteristics ◽  
Machine Tools ◽  
Precision Machine ◽  
Ultra Precision ◽  
Precision Machine Tools

Design of Spindle Supported by High Stiffness Water Hydrostatic Thrust Bearing

2013 ◽  
Author(s):  
Yohichi Nakao ◽  
Kohei Yamada ◽  
Kenji Suzuki
Keyword(s):  
Machine Tools ◽  
Water Pressure ◽  
Machining Accuracy ◽  
Thrust Bearings ◽  
High Stiffness ◽  
Precision Machine ◽  
Hydrostatic Bearings ◽  
Ultra Precision ◽  
Bearing Stiffness ◽  
Precision Machine Tools

A precision spindle is a key component of the ultra-precision machine tools that are used for machining precision molds for producing various lenses and other precise parts. The machining accuracy required for the parts now reaches several tens of nanometers. In order to achieve the desired machining accuracy, the precise spindle system with high stiffness bearings is inevitably needed for the ultra-precision machine tools. The paper thus deals with a design of a spindle supported by water hydrostatic bearings. An objective of the study is to design the precision spindle supported by the water hydrostatic bearings with the bearing stiffness of 1 kN/μm. Thus the paper presents the design procedure of the hydrostatic thrust bearings. In particular, the design of the bearing restrictors is introduced. The characteristics of water hydrostatic thrust bearings of the designed spindle are investigated theoretically. The influences of the gap sizes and the supply water pressure on the bearing stiffness are given. It is indicated that the bearing stiffness of 1 kN/μm can be obtained by the spindle design. Structure and materials of the developed spindle are also introduced.

Temperature field distribution of non-spherical hydrostatic bearings for ultra-precision machine tools

2012 ◽  
Vol 20 (8) ◽  
pp. 1759-1764 ◽  
Author(s):  
夏毅敏 XIA Yi-min ◽  
张刚强 ZHANG Gang-qiang ◽  
罗松保 LUO Song-bao ◽  
张建明 ZHANG Jian-ming
Keyword(s):  
Temperature Field ◽  
Field Distribution ◽  
Machine Tools ◽  
Temperature Field Distribution ◽  
Precision Machine ◽  
Hydrostatic Bearings ◽  
Ultra Precision ◽  
Precision Machine Tools

scholarly journals Ultra-precision: enabling our future

2012 ◽  
Vol 370 (1973) ◽  
pp. 3993-4014 ◽  
Author(s):  
Paul Shore ◽  
Paul Morantz
Keyword(s):  
Mass Production ◽  
Machine Tools ◽  
Well Being ◽  
First Century ◽  
Precision Engineering ◽  
Precision Machine ◽  
Ultra Precision ◽  
Manufacturing Accuracy ◽  
Precision Machine Tools ◽  
Wealth Generation

This paper provides a perspective on the development of ultra-precision technologies: What drove their evolution and what do they now promise for the future as we face the consequences of consumption of the Earth’s finite resources? Improved application of measurement is introduced as a major enabler of mass production, and its resultant impact on wealth generation is considered. This paper identifies the ambitions of the defence, automotive and microelectronics sectors as important drivers of improved manufacturing accuracy capability and ever smaller feature creation. It then describes how science fields such as astronomy have presented significant precision engineering challenges, illustrating how these fields of science have achieved unprecedented levels of accuracy, sensitivity and sheer scale. Notwithstanding their importance to science understanding, many science-driven ultra-precision technologies became key enablers for wealth generation and other well-being issues. Specific ultra-precision machine tools important to major astronomy programmes are discussed, as well as the way in which subsequently evolved machine tools made at the beginning of the twenty-first century, now provide much wider benefits.

Current Development and Countermeasure of Ultra-Precision Machine Tools

2010 ◽  
Vol 455 ◽  
pp. 632-636
Author(s):  
R.J. Song ◽  
J.L. Niu ◽  
Dong Hai Chen
Keyword(s):  
Machine Tools ◽  
Precision Machining ◽  
Machining Accuracy ◽  
Current Development ◽  
Factors Influencing ◽  
Precision Machine ◽  
Ultra Precision ◽  
Precision Machine Tools

Ultra-precision machine tools is an important machinery equipment to implement ultra-precision machining. Current development and the trend of the ultra-precision machine tools was analyzed. The factors influencing machining accuracy were pointed out from the viewpoint of system. Some suggestions were put forward on the domestic development and research of the ultra-precision machine tools.

Analysis on Dynamic Characteristics of Closed Hydrostatic Guideway Throttled by Capillary

2014 ◽  
Vol 607 ◽  
pp. 594-599
Author(s):  
Xiao Chuang Zhu ◽  
Wei Guo Gao ◽  
Teng Liu ◽  
Sheng Hui Zhao ◽  
Guan Wei Zhang ◽  
...  
Keyword(s):  
Dynamic Characteristics ◽  
Machine Tools ◽  
High Capacity ◽  
Volume Effect ◽  
Damping Coefficient ◽  
Theoretical Research ◽  
Oil Film ◽  
Damping Effect ◽  
Ultra Precision ◽  
Precision Machine Tools

Hydrostatic guideway is widely used in heavy and ultra-precision machine tools due to their high bearing capacity, low coefficient of friction and high capacity of precision-remaining. So it is necessary to carry on theoretical research on its dynamic characteristics. Firstly, the oil-film damping coefficient of closed hydrostatic guideway throttled by capillary is derived. Secondly, a new dynamic mathematical model, considering the oil damping effect, the extrusion effect and the volume effect, of the closed hydrostatic guideway is proposed. Thirdly, the frequency characteristics and step characteristics of it are simulated in Matlab Simulink through the transfer function. Finally, the paper investigates the influence of damping coefficient, the oil pressure, volume effect and the initial oil-film thickness on the dynamic characteristics of closed hydrostatic guideway throttled by capillary.

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