A Study on the Analysis of Stich-Slip Phenomenon Relating the Properties of Lubricants.

粘滑现象被认为是由摩擦的速度特性决定的，但还没有得到详细的阐明，特别是它与润滑剂性质的关系。本研究项目的目的是：确定润滑剂对粘滑现象的影响，并分析摩擦的速度特性。制作了球盘摩擦仪，通过计算发生粘滑的极限载荷来分析润滑剂的作用效果。研究发现，由于表面条件的细微差异，试件的制备和表面的光整加工都会受到影响，因此应特别注意试件的制备和表面光整。在下一阶段的研究工作中，通过引入带有A/D转换器的个人计算机系统，对摩擦装置进行了改装，使其能够分析边界摩擦的速度特性。结果表明，滑移过程中运动物体最高速度处的动摩擦系数(&lt；Mu&gt；k)随润滑油粘度的增加而减小，但超过一定的粘度后又增大。研究还发现，滑移宽度与&lt；Mu&gt；k值密切相关。

It is considered that stick-slip phenomenon is determined by the velocity characteristics of the friction, but it has not been clarified in detail, especially, its relation to the properties of the lubricants. The purposes of this research project are; determination of the effect of the lubricant on the stick-slip phenomenon, and analysis of the velocity characteristics of the friction. A ball on disk friction apparatus was made to analyze the effect of the lubricants by obtaining the limiting load where the stick-slip begin to occur. It is found that much attention should be paid to the preparation of the specimen and finishing the surface, because the results may be affected by the slight differences in the surface conditions. It is also found that a polymer compound which was added in the lubricating oil as a viscosity lidex improver may not affect the results by itself alone but it may affects the results when oiliness agent such as fatty acid are present in the lubricating oil.In the next stage of the research work, the friction apparatus was then modified to analyze velocity characteristics of the boundary friction by introducing a personal computer system with A/D converter. It is found that kinetic friction coefficient at the highest velocity of the moving body in the slip process (<mu>_k) decreased with increasing viscosity of the lubricant but it changed to increase beyond certain value of the viscosity. It was also found that slip width was closely related to the <mu>_k value.