电镀锌螺栓摩擦因数影响因素的实验研究

Experimental Research on the Key Interference Factors of Zinc-coated Bolts Friction Coefficient

针对目前电镀锌螺栓扭矩系数散差大,不利于预紧力控制的问题,基于单因素方差分析理论,通过对不同螺栓强度等级、镀层厚度、钝化层、支撑面硬度的镀锌螺栓进行拧紧实验,找出影响螺栓摩擦因数的关键因素,发现D级钝化层螺栓比C级能承受更大轴向力,可以有效提高螺栓效能。对影响螺栓摩擦因数的关键因素进行控制,通过对控制前后实验数据的对比,发现控制后能有效地减少螺栓扭矩系数的散差,提高镀锌螺栓连接的可靠性。

For the problem of big dispersion of nut factor,which is unfavorable for pre-tightening force control,based on the one-way analysis of variance theory,through the tighten experiments on different strength grade,coating thickness,rota-tional speed,bolt chromate treatment,bearing surface hardness of the bolts,the key factors affecting bolt friction coefficient were found out.It is shown that D chromate treatment bolts can effectively improve the tighten bolt axial force and give full play to the bolt＆#39;s using efficiency.Through control the key factors affecting bolt friction coefficient,the dispersion of nut factor is effectively reduced and the reliability of connector is improved.