Method for analyzing sensitivity of geometric errors of dual-rotation axes of five-axis CNC machine tool

A sensitivity analysis, dual-rotation axis technology, applied in program control, computer control, general control system, etc., can solve the problem of rapid identification of geometric errors of dual-rotation axes, etc.

Inactive Publication Date: 2020-02-25
TIANJIN POLYTECHNIC UNIV
View PDF7 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The geometric errors of the rotary axes are coupled with each other, and it is difficult to quickly identify the geometric errors of the dual rotary axes by the general method. Therefore, it is very

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
  • Method for analyzing sensitivity of geometric errors of dual-rotation axes of five-axis CNC machine tool
  • Method for analyzing sensitivity of geometric errors of dual-rotation axes of five-axis CNC machine tool
  • Method for analyzing sensitivity of geometric errors of dual-rotation axes of five-axis CNC machine tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0074] In order to solve the above-mentioned problems, the present invention proposes a method for identifying the geometric errors of the dual rotation axes of a five-axis CNC machine tool based on sensitivity analysis. Errors were subjected to Sobol sensitivity analysis. The invention can easily and accurately identify geometric errors, obtain the degree of influence of each error element on the total error, and then improve processing quality by controlling key geometric errors. Specific steps are as follows:

[0075] Step 1. Using multi-body system theory and homogeneous transformation matrix to model geometric errors, the specific steps are as follows:

[0076] Step 1.1. Set the reference coordinate system and the local coordinate system for the CNC machine tool based on the topological structure relationship of the CNC machine tool components, and set the Y-axis local coordinate system to coincide with the reference coordinate system. The reference coordinate system of ...

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 proposes a method for analyzing sensitivity of geometric errors of dual-rotation axes of a five-axis CNC machine tool, and the method comprises the following steps of firstly constructing a mathematical model of geometric errors of the dual-rotation axes based on a multi-body system theory and a homogeneous transformation matrix; performing error parameter sampling by using a Monte Carlo method, and analyzing the sensitivity of the geometric errors of the dual-rotation axes of the CNC machine tool; finally performing sensitivity analysis on the error parameters based on the positions of the specific rotation angles of the dual-rotation axes, and calculating the first-order sensitivity and global sensitivity of each geometric error of the dual-rotation axes at this position bysetting the positions of five groups of specific rotation angles, wherein the Sobol sensitivity analysis method can be used to identify the key geometric error among the 20 geometric errors of the dual-rotation axes, and complete the identification of the geometric errors of the dual-rotation axes of the five-axis CNC machine tool. The method has the advantages of simple detection steps, convenient measurement and high identification accuracy.

Description

technical field [0001] The invention belongs to the technical field of error detection of numerical control machine tools, and in particular relates to a method for identifying geometric errors of dual rotation axes of five-axis numerical control machine tools based on sensitivity analysis. [0002] technical background [0003] Compared with three-axis CNC machine tools, five-axis CNC machine tools have the ability to process complex parts. The reason is that five-axis CNC machine tools have added two rotation axes compared with three-axis CNC machine tools. When the five-axis CNC machine tool is used for machining, the generated tool path has greater flexibility than that of the traditional three-axis machine tool. However, the rotary axis introduces its own error elements during machining, and the geometric error has a great influence on the total error, which affects the machining accuracy of the machine tool to a large extent. [0004] Geometric errors are generally con...

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): G05B19/404
CPCG05B19/404G05B2219/35408
Inventor 蒋晓耕崔志威王量
Owner TIANJIN POLYTECHNIC UNIV
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