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工程设计学报
Chin J Eng Design  2023, Vol. 30 Issue (3): 390-398    DOI: 10.3785/j.issn.1006-754X.2023.00.038
Mechanical Strength Design     
Research on influence of wire spring inclination angle on storage life of wire spring hole electrical connector
Hongjie GUO1(),Shuya LIANG1,Wenhua CHEN1(),Liqiang ZHONG1,Zhewen CHEN1,Jiahui YAN2
1.Zhejiang Province ' s Key Laboratory of Reliability Technology for Mechanical and Electrical Product, Zhejiang Sci-Tech University, Hangzhou 310018, China
2.Key Laboratory of Reliability Physics and Application Technology of Electronic Components, The Fifth Institute of Electronics, Ministry of Industry and Information Technology, Guangzhou 511370, China
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Abstract  

The wire spring inclination angle is one of the important design parameters for the wire spring hole electrical connector, which has a significant impact on its storage life. Aiming at this problem, the failure mechanism of the wire spring hole electrical connector was analyzed when the wire spring inclination angle changed in the storage environment, and its storage reliability statistical model was established. On this basis, a mathematical model of the storage life of wire spring hole electrical connector varing with the wire spring inclination angle was established. Finally, a constant stress accelerated degradation test scheme was developed and relevant tests were carried out. Through statistical analysis of the test data, the performance degradation model parameter estimates of the wire spring hole electrical connector under different wire spring inclination angles (7o?10o) were obtained, achieving the storage reliability evaluation of electrical connectors. The results showed that the goodness of fit of the functional relationship between storage life and wire spring inclination angle obtained by least square method was as high as 0.968 1, which verified the accuracy of the established model. The research results can provide a theoretical basis and reference for the reliability growth design of wire spring hole electrical connectors in the future.

Key words： wire spring inclination angle      wire spring hole electrical connector      storage life      reliability statistical model      accelerated degradation test     
Received: 21 October 2022      Published: 06 July 2023
CLC:  TB 114  
Corresponding Authors: Wenhua CHEN     E-mail: ghj17858382911@163.com;chenwh@zstu.edu.cn
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Hongjie GUO
Shuya LIANG
Wenhua CHEN
Liqiang ZHONG
Zhewen CHEN
Jiahui YAN
Cite this article:

Hongjie GUO,Shuya LIANG,Wenhua CHEN,Liqiang ZHONG,Zhewen CHEN,Jiahui YAN. Research on influence of wire spring inclination angle on storage life of wire spring hole electrical connector. Chin J Eng Design, 2023, 30(3): 390-398.

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https://www.zjujournals.com/gcsjxb/10.3785/j.issn.1006-754X.2023.00.038     OR     https://www.zjujournals.com/gcsjxb/Y2023/V30/I3/390


线簧丝倾角对线簧孔式电连接器贮存寿命的影响研究

线簧丝倾角是线簧孔式电连接器的重要设计参数之一，对其贮存寿命有显著影响。针对该问题，分析了贮存环境下线簧丝倾角改变时线簧孔式电连接器的失效机理，并建立了其贮存可靠性统计模型。在此基础上，建立了线簧孔式电连接器贮存寿命随线簧丝倾角变化的数学模型。最后，制定了恒定应力加速退化试验方案并开展相关试验，通过统计分析试验数据得到不同线簧丝倾角（7°~10°）下线簧孔式电连接器的性能退化模型参数估计值，实现了电连接器的贮存可靠性评估。结果表明，通过最小二乘法拟合得到的贮存寿命与线簧丝倾角的函数关系式的拟合优度高达0.968 1，验证了所构建模型的准确性。研究结果可为后续线簧孔式电连接器的可靠性增长设计提供一定的理论基础和参考。


关键词： 线簧丝倾角,  线簧孔式电连接器,  贮存寿命,  可靠性统计模型,  加速退化试验 
Fig.1 Schematic diagram of wire spring hole contact structure
Fig.2 Schematic diagram of internal contact between pin and wire spring socket
Fig.3 Schematic diagram of wire spring envelope surface
Fig.4 Resistance measurement site of wire spring hole contact

温度

T/℃

线簧丝倾角θ/(°)样本量/对测试间隔/h截尾时间/h
1057201201 500
8
9
10
12071572
8
9
10
14071524
8
9
10
15871512
8
9
10
Table 1 Schemes for constant stress accelerated degradation test of wire spring hole contact
Fig.5 Average performance degradation curves of wire spring hole contact under different wire spring inclination angles at 120 ℃
温度/℃P1φ(7°)P2φ(8°)P3φ(9°)P4φ(10°)
1050.9110.1190.2840.526
1200.9350.9160.5460.508
1400.5400.5330.2600.347
1580.3530.2530.2800.786
Table 2 Test results of logarithmic normal distribution of film resistance degradation rate of wire spring hole contact
线簧丝倾角/(°)σ?lnαγz?1z?2β?
70.329 91.660 7-2.679 30.519 7
80.334 11.372 0-2.541 60.507 3
90.341 81.335 6-2.497 10.496 2
100.344 11.851 9-2.687 70.497 9
Table 3 Maximum likelihood estimation of performance degradation model parameters for wire spring hole contact
Fig.6 Reliability curves of wire spring hole electrical connector under different wire spring inclination angles
线簧丝倾角/(°)78910
贮存寿命/h502 530537 485608 135720 806
Table 4 Storage life of wire spring hole electrical connector under different wire spring inclination angles（R=0.99）
Fig.7 Fitting curves between storage life and wire spring inclination angle of wire spring hole electrical connector
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