Faster Generation and its Functionally of Surface Having Stratified Functional Properties by Ultrasonic Vibration Cutting

Surface texture is one of the most important factors that dominate the tribological properties of the surface. The current texturing technique has productivity issues that hinder its industrial application. Texturing by ultrasonic vibration cutting has a high productivity capacity and can accelerate industrial applications. However, the textured shape has a convex shape that limits the degree of freedom in shape because the vibration trajectory of the tool is transferred to the surface. This study therefore generates a surface having stratified functional properties while maintaining the high productivity of ultrasonic vibration cutting by transferring a portion of the vibration trajectory to the workpiece surface. For industrial applications, a micro-infeed device that can be mounted on a general-purpose lathe was developed and used. As a result, by taking into account the deformation of the cutting device, it was possible to texture the dimple depth as designed with an accuracy of 0.2 μm. Moreover, the tribological properties of the machined surface were measured by the ball-on-disk tribotest, which confirmed the effectiveness in collecting wear debris in the textured surface.