부산대학교 도서관

Magnetic abrasive machining (MAM) is a machining technique in which magnetic fields are used to control abrasive tools during the machining process of a material. Due to the development of engineering technologies, various properties such as surface accuracy, dimensional accuracy, and lightweight materials are required in current engineering applications. This study proposes a new optimized magnetic abrasive machining process that used an ultra-high-speed system to perform precision machining on a cylindrical workpiece. The system can process several microns of material, either for machining surface roughness or for machining a workpiece for a precise micro-diameter. In this study, STS 304 bars were used as the cylindrical workpieces and were machined via magnetic abrasive machining processes with an ultra-high-speed of 80000 rpm, follow by 40000 rpm, 20000 rpm and 2000 rpm. In order to find the effect of parameters on magnetic abrasive machining process, the cylindrical workpieces were performed with different machining conditions such as machining speed, machining time, machining frequencies, inert gas in/out, magnetic pole types, and magnetic abrasive mesh size. A new technique was proposed for measuring and evaluating the plastic deformation and material life of the cylindrical workpiece before and after machining by an ultra-precision machined surface in terms of surface integrity. Taguchi method was applied to analyze the results of machining process to determine the effect of different process parameters in performance of machining process. To ensure the reliability of the ultra-high-precision machining equipment, the experimental data was analyzed using statistical analysis. It is found that all the machining parameters such as machining speed, machining time, machining frequencies, inert gas in/out, magnetic pole types, and magnetic abrasive mesh size have significant effect on outputs considered in the present study.