Microstructuring of Surfaces by Two-stage Vibration-assisted Turning

作     者：R. Zhang P. Steinert A. Schubert 

作者机构：Technische Universität Chemnitz Faculty of Mechanical Engineering Professorship Micromanufacturing Technology 09126 Chemnitz Germany Fraunhofer Institute for Machine Tools and Forming Technology 09126 Chemnitz Germany 

出 版 物：《Procedia CIRP》 (CIRP会议集)

年 卷 期：2014年第14卷

页      面：136-141页

学科分类：12[管理学] 1201[管理学-管理科学与工程(可授管理学、工学学位)] 08[工学] 

主　　题：Surface microstucturing Vibration-assisted turning Tribology 

摘      要：Microstructuring is one suitable method to improve the tribological properties of surfaces. It leads to a reduction in friction and wear, especially in highly loaded tribological contacts. There are several machining techniques to generate microstructures, such as laser beam removal, cold forming, etching or fly-cutting. This paper describes a new method to produce microstructured surfaces more economically, based on a two- staged vibration-assisted turning process. During the first step, a specific microstructure is realized by ultrasonic vibration assistance of the turning tool in the direction perpendicular to the workpiece surface. In the subsequent step, the peaks of the obtained microstructured surface are removed by precision turning without vibration. This results in a plateau-shaped and microdimpled surface. The two-staged vibration- assisted turning process offers the advantage that no additional process is required after finishing because the microstructuring process is already part of the finishing operation. The investigated process can easily be integrated into large batch production, e. g., for tribological optimization of powertrain components.