Hydrostatic rotary table kinematic error modeling and computing method

A technology of motion error and static pressure turntable, which is applied in calculation, special data processing applications, instruments, etc., can solve the problem of insufficient processing error of turntable

Active Publication Date: 2015-04-22
BEIJING UNIV OF TECH
View PDF3 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, scholars at home and abroad have conducted extensive and in-depth research on the basic theory of static pressure bearings and the general design method of static pressure turntables, but...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hydrostatic rotary table kinematic error modeling and computing method
  • Hydrostatic rotary table kinematic error modeling and computing method
  • Hydrostatic rotary table kinematic error modeling and computing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The present invention implements a static pressure turntable motion error modeling and calculation method that considers machining contour errors. The implementation of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0022] figure 1 It is a schematic diagram of the structure of the static pressure turntable. The turntable is composed of a turntable, a base, a supporting oil pad, a pre-pressing oil pad, and a radial bearing. The supporting oil pad is a double-circle circular oil pad, and the pre-pressing oil pad is an annular pre-pressing oil pad. Pad, a radial bearing is installed in the center of the turntable. The oil pads of the turntable are supplied by quantitative pumps. Due to processing, the guide rail surface of the turntable will be uneven, and the sine function is used to describe the fluctuation of the guide rail surface of the turntable equivalently. The self-weight of the turntable is G, and the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a hydrostatic rotary table kinematic error modeling and computing method. The method comprises the steps that a single oil pad theoretical model based on the reynolds equation works out pressure distributions of a prepressing oil pad and a bearing oil pad during kinematic error considering, and then integration is carried out on pressure distributions to obtain bearing force Fy, Fi and Fj of the prepressing oil pad and the bearing oil pad; the oil film thickness of each oil pad is simplified to be the oil film thickness of the center of the oil pad, rotary table machining contour errors are considered and form functions in a fitting mode, and the oil film thickness and speed of each oil pad are determined according to the geometrical relationship between the oil film thickness of the oil pads; a kinetic equilibrium equation of the rotary table is built; the kinetic equation of the rotary table is solved in the Matlab software through the Runge-Kutta Method, so that influences of main parameters such as the rotary table rotating speed, the machining contour errors and the like on the kinematic error are obtained, and a reasonable range is provided for the hydrostatic rotary table machining precision.

Description

technical field [0001] The invention belongs to the field of static pressure turntable analysis, and relates to a static pressure turntable motion error modeling and simulation calculation method supported by a double-circle oil cushion, more specifically, a method for calculating the motion error of a static pressure turntable that considers the rotation speed of the turntable and the processing contour error Modeling and simulation calculation methods. Background technique [0002] Hydrostatic Rotary Table (Hydrostatic Rotary Table) uses pressurized fluid to separate two surfaces with relative motion and carry it by hydrostatic pressure. Since the kinematic pairs are completely separated by the oil film, the friction between the kinematic pairs is greatly reduced, while its bearing capacity, motion accuracy and life are greatly improved. Because of the many advantages of hydrostatic support, it is widely used in heavy machine tools and becomes one of its key components. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06F17/50
Inventor 刘志峰李小燕湛承鹏赵永胜
Owner BEIJING UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap