Design of Recess-Type Hydrostatic Slide Tables for Precision Machine Tools

摘要

This paper aims to develop the design theory and analysis tool for hydrostatic slide tables using capillary or orifice restrictor in precision machine tool applications. More specifically, to develop a design and analysis computational tool for hydrostatic slide tables with specific bearing chamber configuration of recess-type that applies in precision lathe machines. Basic performance characteristics of hydrostatic bearings such as, load capacity, stiffness, damping, flow rate of oil, pumping power, friction power loss, etc. will be analyzed in this study. The design theory and analysis tool development of the hydrostatic slide table will be based on considering a single bearing pad, which constitutes then the basic, modular element to be used to construct any desired table/slide configuration. Once the characteristics of one pad are modelled and analyzed satisfactory in function of the design parameters, the obtained results can be used in other dedicated design environments to simulate the performance behaviour of any integrated system of interest, which comprises a number of different pads. Finally a recess-type hydrostatic slide table equipped with two different restrictors (i.e., capillary, orifice) will be analyzed, as a design example, to compare their basic performance characteristics.