The tribological performance of a machined surface is greatly influenced by the quality and reliability of manufacturing processes employed in its creation. In the present study, an attempt has been made to investigate the effects of various cutting parameters which include cutting speed, feed rate, depth of cut, and ultrasonic vibration amplitude on surface tribological characteristics of C45 carbon steel while employing surface functional indices, namely, Surface bearing index (Sbi), Core fluid retention index (Sci), and Valley fluid retention index (Svi). Ultrasonic elliptical vibration-assisted turning (UEVT) and conventional turning (CT) experiments were carried out to comparatively assess the performance of both cutting methods in terms of the surface functional parameters’ response. The observed variations of the surface functional indices under the influence of the investigated cutting parameters were critically analyzed, and a detailed comparative discussion based on the surface generation mechanisms of both cutting methods is presented. The results obtained from the 3D surface measurement revealed that the variation trends of the surface functional indices in both processing techniques are relatively the same and the UEVC method was found to have higher potential of improving the overall tribological properties of the machined surface compared with the CC method.

机械加工表面的摩擦学性能在很大程度上取决于其制造过程中所采用的制造工艺的质量和可靠性。在本研究中，已尝试研究各种切削参数，包括切削速度，进给速度，切削深度和超声振动幅度对C45碳钢的表面摩擦学特性的影响，同时采用表面功能指数，即表面承载指数（Sbi），岩心流体保持指数（Sci）和谷流体保持指数（Svi）。进行了超声椭圆振动辅助车削（UEVT）和常规车削（CT）实验，以根据表面功能参数的响应比较评估两种切削方法的性能。严格分析了在所研究的切削参数的影响下观察到的表面功能指数的变化，并基于两种切削方法的表面生成机理进行了详细的比较讨论。从3D表面测量获得的结果表明，两种加工技术中表面功能指数的变化趋势相对相同，并且与CC相比，UEVC方法具有改善加工表面整体摩擦学性能的更大潜力。方法。