Machine tool geometric accuracy optimization method based on value analysis method

An optimization method and geometric precision technology, applied in geometric CAD, computer parts, special data processing applications, etc., can solve problems such as low work efficiency, lack of functional and structural features, and high cost

Active Publication Date: 2018-05-18
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, many studies at home and abroad have focused on the optimal design of the precision distribution of machine tool geometric errors, but most studies still do not pay enough attention to the close relationship between precision and cost, and many studies still stay in the precision design of machine

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
  • Machine tool geometric accuracy optimization method based on value analysis method
  • Machine tool geometric accuracy optimization method based on value analysis method
  • Machine tool geometric accuracy optimization method based on value analysis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0122] Step 1: Establish geometric error model of precision machining center

[0123] Step 1.1 establishes the feature matrix of the precision horizontal machining center

[0124] The present invention takes the horizontal coordinate boring machining center JIG630 as an example to model and analyze its geometric error. topology see figure 1 , there are 30 geometric errors including positioning error, straightness error, angle error, etc. The symbols and descriptions of these 30 errors are shown in Table 1. The present invention uses a homogeneous transformation matrix for error modeling, and the homogeneous transformation matrix between the moving parts is shown in Table 2.

[0125] Step 1.2 Establish geometric error model of precision machining center

[0126] Suppose the coordinates of the tool forming point in the tool coordinate system are:

[0127] P t =(p tx p ty p tz 1) T (33)

[0128] The coordinates of the workpiece forming point in the workpiece coordin...

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 present invention discloses a machine tool geometric accuracy optimization method based on a value analysis method. The method based on a value analysis method is characterized in that: a method for combining the global sensitivity analysis of machine tool machining accuracy and the geometric error correlation analysis is used to analyze each error item of the four-axis machining centers. Themethod comprises that: the geometric error modelling is carried out on the four-axis machine tool by using the homogeneous transformation matrix method; then the global sensitivity analysis and correlation analysis are carried out on the machining accuracy of the numerical control machine tool to determine the influence degree of each error item on the machine tool machining accuracy and determinethe function coefficient and the cost coefficient in the value analysis method; an accuracy distribution optimization model of the geometric error of the machine tool is established; and according tothe value analysis method, optimized design is carried out on the machine tool machining accuracy.

Description

technical field [0001] The invention relates to an analysis method for the geometric precision of a multi-axis machine tool, belongs to the field of machine tool precision design, and specifically relates to a method for optimizing the geometric precision of a machine tool based on a value analysis method. Background technique [0002] In the process of modern mechanical design and manufacturing, with the development of cutting-edge science and technology, the processing technology requirements for precision and ultra-precision instruments are getting higher and higher, and the processing accuracy of machine tools is even more important. In recent years, more and more attention has been paid to the machining accuracy of CNC machine tools, and breakthroughs have been made in related technologies. However, with the continuous improvement of machining accuracy, the machining cost of machine tools has also increased. Therefore, in order to meet market demand , it is necessary to...

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): G06F17/50G06K9/62
CPCG06F30/17G06F18/23
Inventor 程强董立芳赵永胜李佳颖刘志峰
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