GB/T 42252-2022 in English
VALIDTest method for torque and preload of aviation threaded collars
- Issued on:2022-12-30
- Implemented on:2023-04-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$97.00
| Standard No: | GB/T 42252-2022 |
| Document status: | VALID |
| Title in English: | Test method for torque and preload of aviation threaded collars |
| Title in Chinese: | 航空用高锁螺母力矩及预紧力测试方法 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2022-12-30 |
| Implemented on: | 2023-04-01 |
| ICS Classification: | 49.030.99-Other fasteners |
| Chinese Classification: | V20-Fasteners |
| Professional Classification: | GB-National Standard |
| Related Keywords: | electronic torque tester manual torque wrench
preload breaking torque torque test equipment requirements torsion torque measurement characteristics yield strength installation torque |
| Related Topics: | Stress test methods and standards
aviation lock aviation nut force test Nut torque torque Tensile test of m3 nut Colliers test force Coating stress test methods and Locking nut tightening torque Gaussmeter magnetic testing method |
《GB/T 42252-2022航空用高锁螺母力矩及预紧力测试方法》由TC435（全国航空器标准化技术委员会）归口，主管部门为国家标准委。
Introduction
1. Background of standard formulation and analysis of technological evolution
As a key connection part of aircraft, the accurate test of torque and preload of high-lock nuts is crucial to flight safety. Based on the needs of the aviation industry and technological development, the GB/T42252-2022 standard specifies the test method of high-lock nuts to ensure that their performance meets the requirements of aircraft.
2. Comparison of standard frameworks
| Standard dimensions | GB/T42252-2022 | MIL-HDBK-81935 | NASM-DTL-HD-87 |
|---|---|---|---|
| Scope of application | High locking nuts for aviation | Military aerospace fasteners | Civil aviation standard parts |
| Test parameters | Locking torque, loosening torque, breaking torque, preload | Breaking torque, yield strength | Installation torque, disassembly torque |
| Test equipment requirements | Torsion testing machine (accuracy level 1) | Electronic torque tester | Manual torque wrench |
3. Implementation suggestions
Test equipment selection suggestions:It is recommended to use a torsion testing machine that meets level 1 accuracy, and regularly calibrate the torque measurement characteristics to ensure accurate test results.
Test environment control:The test should be carried out in an environment with controlled temperature and humidity to avoid interference from external factors.
Data recording and analysis:It is recommended to use professional software to record the torque-angle curve and extract key parameters according to standard requirements.
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