Effect of the Friction Coefficient on the Connection Performance of High Strength Bolted Joints in Micro-car
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摘要: 针对目前大多汽车厂商没有控制螺栓的摩擦系数,联接可靠性差的问题,通过对控制摩擦系数前后的微车常用的电镀锌高强度螺栓进行拧紧实验和不同摩擦系数的螺栓进行横向振动实验,并从控制扭矩系数稳定性、扭矩转化率、防松脱等方面分析了摩擦系数对螺栓联接性能的影响。结果表明:随着摩擦系数的散差减小,扭矩系数的散差减小;随着摩擦系数的增大,螺栓的防松性能越好,但是扭矩转化率越低。控制螺栓的摩擦系数能控制扭矩系数的稳定性,提高摩擦防松的稳定性。Abstract: Aiming at the low connecting reliability resulting from uncontrolling the friction coefficient of bolted joints in vehicle assembly,by carrying out tightening experiments on different zinc-coated high strength bolted joints,and lateral experiments of bolted joints in different friction coefficients,effect of the friction coefficient on the performance of bolt connection are analyzed on different aspects of controlling torque coefficients' stability,energy dissipation of torque and preventing loosening. The results show that the decrease in dispersion of friction coefficient will reduce the dispersion of torque coefficient,and the increase in friction coefficient will better the performance of preventing loosening but lessen the conversion rate of toque,and to control the bolts' friction coefficients can control torque coefficients' stability and improve stability of preventing loosening. And the controlling range of fiction coefficients is also recommended.
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Key words:
- assembly /
- automobiles /
- bolted joints /
- connection performance /
- energy dissipation /
- experiments
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[1] Nassar S A,Matin P H,Barber G C. Thread frictiontorque in bolted joints [C]//American Society ofMechanical Engineers,ASME/JSME 2004 PressureVessels and Piping Conference,2004:145-154 [2] 李至广. 钛合金螺纹连接结构预紧力、 应力、 可靠性分析[D]. 长沙:国防科学技术大学,2004Li Z G. Analysis of preload,stress,reliability oftitanium screw joint structure[D]. Changsha: NationalUniversity of Defense Technology,2004 (in Chinese) [3] 熊云奇,张琼敏,卢海波. 汽车螺纹紧固件摩擦性能要求探讨[J]. 汽车科技,2000,(1):30-32Xiong Y Q,Zhang Q M,Lu H B. Automobile frictionperformance requirements of threaded fasteners[J].Auto Mobile Science and Technology,2000,(1):30-32(in Chinese) [4] 林湖. 高强度汽车紧固件调查报告[J]. 汽车工艺与材料,2006,(6):27-29Lin H. Investigation report on high-strengh automotivefasteners[J]. Automobile Technology and Material,2006,(6):27-29 (in Chinese) [5] 林浩. 如何合理选择螺栓的装配扭矩[J]. 汽车与配件,2012,(46):26-27Lin H. How to select the reasonable assembly torque ofthreaded fasteners[J]. Automobile and Parts,2012,(46):26-27 (in Chinese) [6] 徐关庆,林胜荣. 汽车防护性表面处理技术发展[J].电镀与精饰,2007,29(4):27-G Q,Lin S R. Development of automobile protectivesurface treatment technique[J]. Plating and Finishing,2007,29(4):27-32 (in Chinese) [7] 濮良贵,纪明刚. 机械设计[M]. 北京:高等教育出版社,2006Pu L G,Ji M G. Design of Machinery[M]. Beijing:Higher Education Press,2006 (in Chinese) [8] Sakai T. Bolted joint engineering: fundamentals andapplications[M]. Beuth Verlag,2008 [9] Nassar S A,El-Khiamy H,Barber G C,et al. Anexperimental study of bearing and thread friction infasteners [C ]//American Society of MechanicalEngineers. ASME/STLE 2004 International JointTribology Conference,2004: 1097-1114 [10] 刘朝英. 螺栓联接松脱分析[J]. 现代机械,2002,(1):70-71Liu C Y. Analysis of loosening of threaded fasteners[J]. Modern Machinery,2002,(1 ): 70-71 (in Chinese) [11] Jiang Y,Lee C H,Zhang M. A study of early stage self-loosening of bolted joints[J]. Journal of MechanicalDesign,2003,125(3):518-526 [12] Housari B A,Nassar S A. Effect of thread and bearingfriction coefficients on the vibration-induced loosening ofthreaded fasteners [J]. Journal of Vibration andAcoustics,2007,129(4):484-494 [13] 赵海川,王晶. 关于风电螺栓扭矩系数与摩擦系数的探讨[J]. 风能,2010,(9):54-56Zhao H C,Wang J. Study of torque coefficient and frictioncoefficient of wind power's threaded fasteners[J]. WindEnergy,2010,(9):54-56 (in Chinese) [14] Nassar S A,Zaki A M. Effect of coating thickness on thefriction coefficients and torque-tension relationship inthreaded fasteners[J]. Journal of Tribology,2009,131(2):021301 [15] 张志涌. 精通 Matlab 6[M]. 北京:北京航空航天大学出版社,2003Zhang Z Y. Proficient in Matlab 6[M]. Bijing:BeihangUniversity Press,2003 (in Chinese) [16] 王文森. 变异系数-一个衡量离散程度简单而有用的统计指标[J]. 中国统计,2007,(6):41-42Wang W S. Coefficient of variation-a simple and usefulstatistical index on dispersion[J]. China Statistics,2007,(6):41-42 (in Chinese) [17] 沈英明,杜彦良,李惠军. 螺纹联接防松方法研究综述[J]. 石家庄铁道学院学报,2002,15(4): 84-87Shen Y M,Du Y L,Li H J. Loosening preventionmethods of threaded connection [J]. Journal ofShijiazhuang Railway Institute,2012,15(4):84-87 (in Chinese)
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