GB/T 10431-2008Transverse vibration testing method for fasteners (English PDF)
紧固件横向振动试验方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
August 25, 2008
Implementation date
February 1, 2009
Scope
GB/T 10431-2008 is the English-translated version of 紧固件横向振动试验方法.
GB/T 10431-2008 is the Chinese national test method for measuring how well a fastener resists self-loosening under transverse vibration.
The fastener is tightened to a set clamping force between two metal plates of a vibration testing machine, an alternating lateral displacement is applied, and the clamping force is recorded continuously, so that the rate of loss shows the locking performance.
It fixes the equipment, with a sinusoidal waveform, clamping force measured within ±3% and lateral displacement within ±1%, and the test conditions: ambient temperature and pressure, lubricated threads and bearing surfaces, a recommended frequency of 12.5 Hz, the pre-test clamping force and ten specimens per group, fifteen when results scatter.
Results serve only as a basis for comparison, not as absolute values. It replaces GB/T 10431-1989, was issued on 25 August 2008 and has applied since 1 February 2009.
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Document preview — GB/T 10431-2008
National Standard of the People's Republic of China
- ICS
- 21.060.10
- Classification
- J 13
- Replacing
- GB/T 10431-1989
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Test principle
- 3 Test equipment and instruments
- 4 Test conditions
Foreword
This standard replaces GB/T 10431-1989 "Transverse vibration testing method for fasteners." This standard compared with GB/T 10431-1989 main changes are as follows.
--- Change the test curve example;
--- Increase the data analysis and the results of its judgment (see 7.2);
--- Cancellation Appendix C.
The Standard Appendix A and Appendix B are informative.
1 Scope
This standard specifies the lateral vibration testing and data processing methods for the determination of the fastener locking properties. The resulting test according to this standard As a result only under certain conditions than the evaluation basis, there is no absolute quantitative indicators.
2 Test principle
Test on the fastener lateral vibration test machine. Tighten the fastener to be tested in the test apparatus so that a certain clamping force.
By means of alternating lateral displacement in the testing machine is clamped between two metal plates to produce, so that a loose connection, resulting in the clamping force is reduced or even completely lose Loss. Continuous recording of the instantaneous value of the clamping force, based on the analysis of the recorded data can match the performance of locking fasteners determined. During the test, Clamping force decreases slower, locking the better the performance; the other hand, the clamping force decreases faster, locking the worse performance.
3 Test equipment and instruments
3.1 Constituting
A block diagram of the test apparatus and the apparatus shown in Figure 1.
A block diagram of FIG. 1 testing facility
3.2 Vibration test machine
As used in this test vibration test machine should be able to meet the test requirements of the frequency and amplitude of the test, the lateral vibration waveform should be sinusoidal.
3.3 Precision equipment
3.3.1 clamping force measurement error should be within ± 3%.
3.3.2 The lateral displacement measurement error should be within ± 1%.
4 Test conditions
To make the results comparable, you should choose the same test conditions.
4.1 Environmental conditions
The test shall be carried out at ambient temperature and pressure, clean environment.
4.2 Lubrication
When the specimen clamping, thread and should be added to the lubricant in the bearing surface to avoid scratches threads and bearing surfaces or heat generated by friction killed Phenomenon, affecting the accuracy of test results.
4.3 Free state test frequency and amplitude
The frequency of testing according to the actual frequency of use or testing requirements to determine, if not determined, recommended 12.5Hz; free state (clamping force Amplitude zero) under the bolt should ensure that the specimen is not cut.
4.4 Pre-test clamping force
Pre-test clamping force according to test requirements or specimen clamping force is determined.
4.5 Number of test pieces
The number of specimens in each group is determined according to test requirements. In general, it is recommended to take 10 each, if you find the vibration characteristics, security in the test There are large differences when loading or removing torque, etc., should be supplemented with 15.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Similar standards
Editions of GB/T 10431
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 10431-2008 | Transverse vibration testing method for fasteners | current edition | Current |
| GB/T 10431-1989 | Transverse vibration testing method for fasteners | previous edition | Superseded |
This page sells the current edition, GB/T 10431-2008. Earlier editions are listed for reference only.
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