Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Matching error calculation method for error transfer modeling of precision mechanical system

A system error and precision mechanical technology, applied in the field of manufacturing quality prediction and control, can solve the problems of non-uniform stress and strain of parts, deformation error, and the error of unconsidered matching surface shape, and achieve the effect of improving accuracy

Active Publication Date: 2012-04-25
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF2 Cites 30 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, all current error transfer models do not take into account the shape error of mating surfaces
In addition, due to the shape error of the parts, under the action of the assembly force, the parts will produce non-uniform stress and strain, resulting in deformation errors

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
  • Matching error calculation method for error transfer modeling of precision mechanical system
  • Matching error calculation method for error transfer modeling of precision mechanical system
  • Matching error calculation method for error transfer modeling of precision mechanical system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] by image 3 The assembly shown is an embodiment. Part one 7 and part two 8 in the assembly are parts of a revolving body, and the two cooperate at circular end faces. The end face is the mating surface 2; the two parts are respectively provided with two radially symmetrical pin holes 9 and four screw holes 10 evenly distributed in the circumferential direction on the circumference of the end face; the establishment is as follows image 3 In the measurement coordinate system shown, the origin o of the coordinate system is located on the center of rotation of the assembly, the line connecting the centers of the two pin holes 9 is used as the x-axis, the plane where the mating surface is located is used as the xoz plane, and the y-axis is determined according to the right-hand rule.

[0036] In this embodiment, the nominal matching surfaces of the matching surface 1 and the matching surface 2 are located in the xoz plane, and all the data and coordinates measured below are...

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 matching error calculation method for error transfer modeling of a precision mechanical system. The method comprises the following steps of: measuring shape errors D1 and D2 of two matching surfaces by applying a three-coordinate measuring machine to obtain data of a difference surface, and determining a contact point according to the data of the difference surface; calculating deformation errors delta 1 and delta 2 of the two matching surfaces of a part according to the contact point and assembly force applied to the two matching surfaces, thereby obtaining actual matching surface data D1+delta 1 and data D2+delta 2 considering the shape errors and the deformation errors of the two matching surfaces of the part; and calculating matching error component of the two actual matching surface to obtain matching error so as to be used for error transfer modeling of the precision mechanical system. In the method, the shape errors of the matching surfaces and the part deformation errors produced under the action of the assembly force are considered, a more accurate error transfer model can be established for the precision mechanical system on the basis, and the accuracy for the manufacturing quality prediction and control is improved.

Description

technical field [0001] The invention relates to a matching error calculation method for precision mechanical system error transmission modeling, which belongs to the field of manufacturing quality prediction and control. Background technique [0002] A common problem in the manufacture of precision mechanical systems is that when the components are qualified, the accuracy of the assembled system cannot meet the design requirements, and the assembly yield is low. One of the main reasons is that the influence of factors such as part processing error, surface quality, assembly error and assembly process parameters in the precision mechanical system on the system assembly accuracy is not clear in theory, and the assembly process is blind. The invention is proposed in the process of constructing an error transfer model expressing the relationship between the processing error of a precision mechanical system part and the system precision. [0003] In the manufacture of products w...

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 金鑫张之敬左富昌叶鑫
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com