超声振动振幅对金属表面滑动性能影响的研究

Study on Influence of Ultrasonic Vibration Amplitude on Sliding Property of Metal Surface

超声减摩是一种有效的减摩方法,已有诸多研究和试验。基于已有理论成果,研究超声振动振幅对金属表面滑动性能的影响。将摩擦学动载荷分析与微观表面超声振动运动学相结合,建立减摩特性理论模型。引入振幅作为第一变量,减摩效果随着振幅的增大而提升。根据平面微观接触的相对振动,建立表面形貌理论模型。通过改变单参数进行对照试验,将试验结果和理论结合,分析振幅增大过程中水平超声振动和垂直超声振动在减摩中的作用,并明确主导因素。

Ultrasonic friction reduction is an effective method of friction reduction,which has been studied and tested by many times.Based on the existing theoretical result,the influence of ultrasonic vibration amplitude on the sliding property of metal surface was studied.The tribological dynamic load analysis was combined with the microscopic surface ultrasonic vibration kinematics to establish a theoretical model of friction reduction characteristic.The amplitude was introduced as the first variable,and the friction reduction effect increases with the increase of amplitude.According to the relative vibration of the plane microscopic contact,a theoretical model of surface morphology was established.By changing the single parameter for the control test,the experimental result was combined with the theory,and the effects of horizontal ultrasonic vibration and vertical ultrasonic vibration in the amplitude increasing process on friction reduction were analyzed,and the leading factor was clarified.