Non-shaft high-precision static pressure numerical control rotary worktable

A rotary table, high-precision technology, applied in the direction of manufacturing tools, metal processing equipment, metal processing machinery parts, etc., can solve the problems of increased processing and assembly of turntable, complicated processing technology, complicated adjustment, etc., to reduce processing and assembly The effect of adjusting difficulty, good dynamic performance and compact structure

Inactive Publication Date: 2010-09-15
XIAN RUITE RAPID MFG ENG +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with cylindrical hydrostatic bearings, the processing technology of hemispherical hydrostatic bearings is more complicated, and the radial stiffness is smaller. The motor rotor of the turntable and the turntable rotor are connected by a transmission shaft. As mentioned above, the processing of the transmission shaft design The processing and assembly accuracy of the turntable increases the difficulty. In addition, the turntable uses a total of 18 oil chambers, and the adjustment is relatively complicated.

Method used

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  • Non-shaft high-precision static pressure numerical control rotary worktable
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  • Non-shaft high-precision static pressure numerical control rotary worktable

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Embodiment Construction

[0011] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0012] see figure 1 , the present invention includes a rotary table and a bearing stator 4 installed on the upper end of the fixed plate 5 of the rotary table, the bearing axial support 15 and the bearing axial downward support 13 are respectively installed on the upper and lower two ends of the bearing radial support 14 , and the bearing axial support 13 is located inside the rotary table fixed plate 5, the bearing axial support 15, the bearing axial support 13 and the bearing radial support 14 form the bearing rotor, which cooperates with the bearing stator 4 to form a liquid Hydrostatic bearing oil film, the oil separation ring cover plate 2 is installed on the upper end of the bearing stator 4, and the sealing gasket 3 is used to seal between the two; Air seal and sealing ring 12 double sealing method, the outer circle of the motor stator 7 is matched wi...

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Abstract

The invention provides a non-shaft high-precision static pressure numerical control rotary worktable. The rotary worktable adopts a hollow non-shaft structure; the surface of the worktable and a motor rotor are directly arranged on a bearing rotor of a liquid static pressure bearing respectively; and the rotary worktable adopts a realizing mode of direct-drive motor driving, rotary encoder feedback and computer numerical control, so that the rotary worktable lowers the difficulty of processing, assembling and adjusting parts of the rotary worktable, improves the precision of the rotary worktable and has the characteristics of compact structure, small inertia and high dynamic property and rigidity. The designed positioning precision of the rotary worktable is 3.5 angular seconds, the repeated positioning precision of the rotary worktable is 1 angular second, the resolution is 0.5 angular second, the radial rigidity is 4,000N/mu m, and the axial rigidity is 30,000N/mu m.

Description

technical field [0001] The invention relates to a numerical control rotary workbench applied to an ultra-precision machine tool, in particular to a shaftless high-precision static pressure numerical control rotary workbench. Background technique [0002] In four-axis or five-axis linkage CNC machine tools, the workpiece rotary table is required to achieve continuous rotation of 0 to 360°. For large CNC machine tools, the workpiece rotary table is also required to have a larger rated torque to ensure that it can withstand its own And the load of the workpiece and has good dynamic performance. [0003] The traditional workpiece rotary table mainly adopts the driving mode of servo motor and gear reduction mechanism. Due to the transmission gap of the gear reduction mechanism, it is difficult to meet the precision requirements of precision machine tools for the rotary table. The existing precision workpiece rotary table usually adopts two driving methods, one is to use a servo ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q1/38
Inventor 陈耀龙何仲赟赵万华薛飞位文明卢秉恒
Owner XIAN RUITE RAPID MFG ENG
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