Abstract
The friction and wear process of the reciprocating sliding surface is different from that of the sliding condition that continuously rotates in one direction. Also, the sliding state changes suddenly due to poor lubrication and progress of surface damage, which not only leads to vibration and abnormal noise, but also seizure in the worst case. Especially when sliding at a high speed, the sliding state changes quickly. Therefore, in order to extend the lifetime of mechanical system, it is desirable to be able to detect and evaluate even slight changes in the sliding state at an early stage. In this study, the evaluation of the sliding state of high-speed reciprocating rotating parts by acoustic emission (AE) sensing which has excellent detection sensitivity was attempted. A comparative experiment under different lubricated conditions and an experiment to verify the effect of fine particle peening treatment for different sliding speeds were conducted. As a result of the experiment, it was found that the lubrication conditions and the effect of surface treatment can be evaluated with higher sensitivity than the rotational deviation of the drive motor by AE sensing.
