CN103317360B - A kind of high precision static pressure rotating table of public fuel feeding track - Google Patents

Abstract

A high-precision static pressure rotary table with a common oil supply track, which supplies oil to the static pressure system at the same time through the public oil supply track, and no less than 3 independent There are no less than 3 independent radial support oil chambers on the wall of the inner hole, and the hydraulic oil is supplied to the axial oil through the common oil supply rail through the oil holes arranged on the bearing bush of the hydrostatic bearing. cavity and radial oil cavity, realizing the synchronous establishment of oil film pressure and reducing structural deformation; the common oil supply rail has symmetrically distributed oil inlets, and the number of oil inlets is an even number, and one oil inlet can be selected arbitrarily according to assembly needs Oil inlet: The static pressure turret has symmetrically distributed oil return ports, and the number of oil return ports is an even number, which ensures the thermal symmetry of the turret structure and reduces the thermal inclination of the turret table. The hydrostatic rotary table has high rigidity and dynamic performance, improves structural stability and rotary precision, and has a compact structure and is easy to install.

Description

A high-precision hydrostatic rotary table with a common oil supply track

technical field

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

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 structural deformation caused by inconsistent pressure also reduces the rotation accuracy of the static pressure turntable.

Contents of the invention

The object of the present invention is to provide a high-precision static pressure rotary worktable with a common oil supply track, which realizes simultaneous oil supply to each oil chamber at the same pressure, overcomes structural deformation caused by inconsistent pressure in the oil chamber, and has a high Structural stability and rotation accuracy. And the invention also has the advantages of compact structure and convenient installation.

In order to achieve the above object, the technical solution adopted by the present invention is: comprising the turntable table top and the turntable frame, and the hydrostatic bearing arranged between the turntable table top and the turntable frame; The hydrostatic bearing bush, and the hydrostatic bearing radial support arranged inside the hydrostatic bearing bush and the hydrostatic bearing axial support on the lower side; the turntable table is installed on the upper end surface of the hydrostatic bearing radial support; the The upper end surface of the axial support of the static pressure bearing is coaxially fixed on the lower end surface of the radial support of the static pressure bearing, and a public oil supply track connected with the oil hole of the bearing pad of the static pressure bearing is provided between the turntable base and the bearing pad of the static pressure bearing .

The two end faces of the hydrostatic bearing bush are respectively provided with no less than 3 independent axial support oil chambers, and the inner hole wall is provided with no less than 3 independent radial support oil chambers.

Said turntable base is arranged with symmetrically distributed oil inlets and oil return ports connected to the common oil supply rail.

The number of the oil inlet and the oil return port is an even number.

The invention supplies oil at the same pressure to the static pressure system of the static pressure rotary table through the common oil supply track, realizes the synchronous establishment of oil film pressure, reduces the structural deformation of the turntable, and improves the stiffness and dynamics of the static pressure rotary table performance, to ensure structural stability and rotation accuracy; the public oil supply track has symmetrically distributed oil inlets, and the number of oil inlets is an even number, and one oil inlet can be randomly selected to feed oil according to assembly requirements; the hydrostatic turntable has two symmetrical Distributed oil return ports, the number of oil return ports is an even number, ensures the thermal symmetry of the turntable structure and reduces the thermal inclination of the turntable table.

Description of drawings

Fig. 1 is the overall structural representation of the present invention;

FIG. 2 is a side view of FIG. 1 .

In the figure, 1. Turntable table top, 2. Hydrostatic bearing bearing bush, 3. Hydrostatic bearing radial support, 4. Hydrostatic bearing axial support, 5. Turntable base, 6. Public oil supply rail, 7. Oil inlet 8, oil return port.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings.

See Figure 1, Figure 2. The present invention comprises a turntable frame 5 and a hydrostatic bearing bush 2 fixed on the turntable frame 5. The radial support 3 of the hydrostatic bearing is arranged on the inner side of the hydrostatic bearing bush 2, and the axial support of the hydrostatic bearing is arranged on the lower side. 4. The turntable table surface 1 is installed on the upper end surface of the radial support 3 of the static pressure bearing, and a common oil supply rail 6 is arranged between the turntable frame 5 and the bearing bush 2 of the static pressure bearing. The oil inlet port 7 and the oil return port 8 are arranged symmetrically on the turntable frame 5 .

The two end faces of the hydrostatic bearing bush of the rotary table of the present invention and the inner hole wall are provided with no less than 3 independent axial support oil chambers and no less than 3 independent radial support oil chambers, providing Axial and radial support of bearings. All the oil chambers on the hydrostatic bearing pads are supplied with oil through the common oil supply rails on the turntable base and the hydrostatic bearing pads to ensure simultaneous oil supply and consistent pressure for each oil chamber, improving the rigidity and dynamic performance of the hydrostatic rotary table. Ensure structural stability and rotation accuracy. The common oil supply rail has symmetrically distributed oil inlets, and the number of oil inlets is an even number, and one oil inlet can be randomly selected to feed oil according to assembly requirements. The static pressure turntable has symmetrically distributed oil return ports, and the number of oil return ports is an even number to ensure the thermal symmetry of the turntable structure and reduce the thermal inclination of the turntable table.

Claims (2)

1. A high-precision static pressure rotary table with a public oil supply track, including a turntable table (1) and a turntable base (5), and a static pressure table arranged between the turntable table (1) and the turntable base (5). Pressure bearing; the hydrostatic bearing includes a hydrostatic bearing bush (2) fixed on the turntable base (5), and a hydrostatic bearing radial support (3) arranged inside the hydrostatic bearing bush (2) and The static pressure bearing axial support (4) on the lower side; the turntable table (1) is installed on the upper end surface of the static pressure bearing radial support (3); the upper end surface of the static pressure bearing axial support (4) is the same as The shaft is fixed on the lower end surface of the radial support (3) of the hydrostatic bearing, and it is characterized in that there is an oil hole connected to the hydrostatic bearing bush (2) between the turntable base (5) and the hydrostatic bearing bush (2) common public oil supply rail (6); The two end surfaces of the hydrostatic bearing bush (2) are respectively provided with no less than 3 independent axial support oil chambers, and the inner hole wall is provided with no less than 3 independent radial support oil chambers; Said turntable base (5) is arranged with symmetrically distributed oil inlets (7) and oil return ports (8) connected to the common oil supply rail (6). 2. The high-precision hydrostatic rotary table for a common oil supply track according to claim 1, characterized in that: the number of the oil inlet (7) and the oil return port (8) is an even number.