面接触多体摩擦过程界面特性试验研究  

Experimental study on the interfacial characteristics in multi-body plane contact friction process

作　　者：熊其玉[1] 王伟[1] 贾文兵[1] 刘焜[1] 

机构地区：[1]合肥工业大学摩擦学研究所230009合肥

出　　处：《应用力学学报》2015年第2期226-232,351,共7页Chinese Journal of Applied Mechanics

基　　金：国家自然科学基金(51175136;51475135);中国博士后科学基金(2014M550339);清华大学摩擦学国家重点实验室开放基金(SKLTKF13A02)

摘　　要：基于前期自制的精密摩擦测试系统,以界面间噪声、摩擦系数等界面特性为研究对象,对Si C金相砂纸和不锈钢试件组成的摩擦副由二体摩擦状态向三体摩擦状态演变的过程进行了实时监测,考察了磨粒粒径、载荷、转速等工况条件对界面特性的影响,并探究了试验后试件表面粗糙度情况。试验结果表明:二体摩擦状态向三体摩擦状态演变过程中,界面间噪声逐渐下降后保持稳定;粒径在15μm^30μm范围内,粒径越小,稳定噪声越大,载荷、转速对稳定噪声的影响不明显,摩擦系数先迅速减小又逐渐增大后趋于稳定;粒径在15μm^30μm范围内,增大磨粒粒径、转速、载荷均会使摩擦系数的稳定状态提前、稳定摩擦系数增大;试验后的试件表面粗糙度与界面间的摩擦系数具有很强的相关性,但基于不同工况条件,这种相关性并不一致;对于变磨粒粒径试验,摩擦系数越大,试件表面粗糙度值越大;对于变载荷试验和变转速试验,摩擦系数越大,试件表面粗糙度值越小。The real-time observation on interfacial noise and friction coefficient is conducted in the process of the transformation from two-body friction to three-body friction for the friction pair composed of Si C sandpaper and stainless-steel workpiece based on an established self-modified precise friction testing system. Effects of particle size, load, and rotational speed on interfacial properties are studied and the surface roughness of the workpiece is also investigated. Results show that during the transformation from two-body friction to three-body friction, the interfacial noise of the interface decreases gradually to a stable value during the tests. For the case of particle size is between 15~30μm, the larger the particle size is, the smaller the stable value is, while the effect of load and rotational speed on the stable noise is indistinct. Friction coefficient between the interfaces decreases rapidly at first, then increases gradually to a stable value. The increasing of particle size, load, and rotational speed can advance both the stable time and stable value of the friction coefficient. The friction coefficient has strong relevance with surface roughness of specimens after test, while the relevance has no consistency in different groups of experiments. When the friction coefficient is bigger, the roughness is bigger in variable particle size experiments, while it is smaller in variable load or variable rotational speed experiments.

关 键 词：多体摩擦过程 噪声 摩擦系数 表面粗糙度 工况条件 

分 类 号：O39[理学—工程力学]