High-precision static pressure rotary working table for public oil supply track

Abstract

A high-precision static pressure rotary working table for a public oil supply track performs simultaneous identical-pressure oil supply to a static pressure system through the public oil supply track. No less than three independent axial supporting oil cavities are respectively arranged on two end faces of a bearing bush of a hydrostatic bearing, no less than three independent radial supporting oil cavities are arranged on an inner hole wall, hydraulic oil is respectively supplied to the axial oil cavities and the radial oil cavities through the public oil supply track and oil holes positioned on the bearing bush of the hydrostatic bearing, synchronous establishment of oil film pressure is achieved, and structural deformation is reduced. The public oil supply track is provided with symmetrically distributed oil inlets, the number of the oil inlets is even, and a random oil inlet can be selected according to the assembly requirements so as to feed oil; the static pressure rotary working table is provided with symmetrically distributed oil returning openings, the number of the oil returning openings is even, thermal symmetry of the rotary working table structure is guaranteed, and thermal tilt of a table top of the rotary working table is reduced. The static pressure rotary working table has high rigidity and dynamic performance, improves structural stability and rotation precision and is compact in structure and convenient to install.

Description

technical field [0001] The invention belongs to the application field of ultra-precision machine tools, and in particular relates to a high-precision static pressure rotary worktable of a public oil supply track. Background technique [0002] In the four-axis or five-axis linkage ultra-precision CNC machine tools, the oil hydrostatic rotary table is widely used. Since the oil hydrostatic system contains multiple hydrostatic oil chambers, the oil supply method of the oil chamber has a great influence on the pressure establishment and the pressure of the hydrostatic oil film. The structural deformation of the hydrostatic turntable has a significant effect. The oil supply system of the static pressure turntable in the prior art usually uses multiple oil channels to supply oil separately, resulting in asynchronous establishment of pressure in each oil chamber and inconsistent pressure, which affects the stiffness and dynamic performance of the static pressure turntable. The str...

AI Technical Summary

Problems solved by technology

The oil supply system of the static pressure turntable in the prior art usually uses multiple oil channels to supply oil separately, resulting in asynchronous pressure establishment and inconsistent pressure in each oil chamber, which affects the stiffness and dynamic performance of the static pressure turntable. The structural deformation caused by inconsistent pressure also reduces the rotation accuracy of the static pressure turntable

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