Method and device for composite position error evaluation

A composite position degree and error evaluation technology, which is applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems that the composite position degree error evaluation cannot be accurately realized

Active Publication Date: 2015-07-01
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method and device for compound position d...

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 and device for composite position error evaluation
  • Method and device for composite position error evaluation
  • Method and device for composite position error evaluation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0057] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0058] According to the definition of compound position error in ASME (American Society of Mechanical Engineers, American Society of Mechanical Engineers), the compound position error is the allowable variation of each actual element between each other or with respect to one or more reference positions, that is, The limit range that the actual position after processing is allowed to deviate from the ideal position specified by the design. In the prior art, with the development of CMM (Coordinate Measuring Machining, Coordinate Measuring Machine) technology, it becomes possible to use a geometric algorithm to realize compound error degree error evaluation for discrete measurement points based on CMM.

[0059] At present, scholars have proposed a large num...

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 provides a method and device for composite position error evaluation, and relates to the field of mechanical engineering. The method and device solve the problem that in the prior art, the composite position error evaluation cannot be achieved accurately. The method for the composite position error evaluation comprises the steps of acquiring geometrical characteristic information and composite position error setting information of a to-be-evaluated product; acquiring function geometry and benchmark geometry theory constraint information of the to-be-evaluated product according to the geometrical characteristic information; building a composite position error theory mathematical model of the to-be-evaluated product according to the function geometry and benchmark geometry theory constraint information and the composite position error setting information; performing three-dimensional convex hull construction on pre-acquired discrete sampling points of the to-be-evaluated product by adopting the convex hull theory of computation geometry; evaluating the composite position error of the to-be-evaluated product according to a three-dimensional convex hull and the theory mathematical model. According to the scheme, the accurate evaluation of the composite position error is effectively achieved.

Description

technical field [0001] The invention relates to the field of mechanical engineering, in particular to a method and device for evaluating compound positional errors. Background technique [0002] Due to the influence of factors such as machine tool fixtures, tools, and process operation levels, there are inevitably differences between the surface of machined parts and the ideal surface. In order to ensure the assembly quality of the product, it is necessary to measure the geometric error of the product before assembly. Guarantee the geometric design requirements of the product. [0003] Although a lot of progress has been made in the measurement and evaluation of geometric errors, the evaluation of compound position errors is still one of the problems that plague scholars. Although functional gauges can realize the judgment of compound position errors, they cannot provide composite position errors. The exact value of the degree of error. Contents of the invention [0004]...

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): G06F19/00
Inventor 刘检华丁晓宇郭崇颖刘少丽鲍强伟
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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