Porous Ceramic Water Hydrostatic Bearings for Improved for Accuracy Performance

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• 作者：J. Corbett ; R.J. Almond ; D.J. Stephenson ; Y.B.P. Kwan
• 关键词：Water Hydrostatic Bearing ; Ceramic ; Precision
• 刊名：CIRP Annals - Manufacturing Technology
• 出版年：1998
• 出版时间：1998
• 年：1998
• 卷：47
• 期：1
• 页码：467-470
• 全文大小：861 K

文摘

Demand continues for the supply of machine tools with improved accuracy and productivity. This necessitates machine structures and spindle assemblies with much higher static and dynamic stiffness than are currently available, together with very low levels of thermal drift. The medium term accuracy of oil hydrostatic bearings has traditionally been limited by the thermal effects and although aerostatic bearings have relatively good thermal characteristics they suffer from a low relative stiffness and load capacity. New concepts are therefore required, and the authors describe a programme which is using fundamental principles to develop a new improved generation of porous bearings.