Reliability determination method based on compression spring stress relaxation testing data

A technology of stress relaxation and test data, which is applied in the field of reliability determination based on compression spring stress relaxation test data, which can solve problems such as long test time, poor accuracy of evaluation data sources, and large data dispersion

Active Publication Date: 2016-02-03
CHINA ACADEMY OF SPACE TECHNOLOGY
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical solution solved by the present invention is: to overcome the deficiencies of the prior art, to provide a reliability determination method based on the compression spring stress relaxation test data, and to solve the problems of large dispersion of compression spring reliability evaluation data, long test time, and evaluation data sources. The problem of poor precision

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
  • Reliability determination method based on compression spring stress relaxation testing data
  • Reliability determination method based on compression spring stress relaxation testing data
  • Reliability determination method based on compression spring stress relaxation testing data

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0072] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0073] Such as Figure 6 As shown, a reliability determination method based on compression spring stress relaxation test data, including Figure 6 The steps shown in the following are illustrated by an example.

[0074] 1. Installation and test preparation of test equipment

[0075] In this example, a helical compression spring wound with 60Si2MnA oil-quenched and tempered steel wire is used for the test. The basic parameters of the spring are d=2mm, D=15mm, t=10mm, H 0 = 65mm.

[0076] The present invention provides a kind of stress relaxation test equipment that can be used for the reliability assessment of compression springs, such as figure 1 and figure 2 As shown, it mainly includes the following modules: bottom plate 1, top plate 2, mounting screw 3, pressure sensor 4, push rod 5, push rod cap 6 and loading nut 7.

[0077] Such as figure 1 and figure ...

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

A reliability determination method based on compression spring stress relaxation testing data comprises the steps of 1) mounting test equipment and performing test preparation; 2) determining test temperatures, performing compression spring stress relaxation tests at different temperatures, acquiring bearing forces at different test times and drawing a stress relaxation curve; 3) respectively drawing a semi logarithmic curve between compression spring load loss rate and time at each testing temperature according to the bearing force and the test time acquired in the step 2) in a manner than the compression spring load loss rate is used as an ordinate and the logarithm of the corresponding test time is used as an abscissa, furthermore obtaining a stress relation equation of a spring sample at an actual operation temperature, and calculating the load loss rate and residual load of the spring sample at the actual operation temperature in the late period of the service life of the spring sample; and 4) acquiring the reliability of the spring sample (8) in the late period of the service life. The reliability determination method effectively settles the problems of high data discreteness, long test time and relatively low data source evaluation precision in reliability evaluation of the compression spring.

Description

technical field [0001] The invention belongs to the technical field of life prediction and reliability evaluation of helical compression springs, and in particular relates to a reliability determination method based on compression spring stress relaxation test data. Background technique [0002] Stress relaxation refers to the process of transformation from pure elastic strain to inelastic strain in the material during the constant strain process. Stress relaxation is the direct cause of failure of many elastic components and fasteners. Stress relaxation inevitably occurs under loads such as extension, compression, bending and torsion. Stress relaxation resistance is an important mechanical performance index of elastic components. Studies have shown that the stress relaxation of the compression coil spring under the long-term compression stress will lead to a decrease in the driving force of the spring, which will directly affect the reliability of satellite system related ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/00
Inventor 王宗仁李毅刘波林逢春袁俊刚
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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