Surface finish of the bulk metallic glass using abrasive jet polishing process on the machining center

• Main Authors: Nguyen Hai Dang, 阮海燈
• Other Authors: Fang- Jung Shiou
• Format: Others
• Language: en_US
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/nf5zhy

碩士 === 國立臺灣科技大學 === 機械工程系 === 99 === This thesis aims to investigate the optimal abrasive jet polishing parameters for Zr-based bulk metallic glass (BMG) material by using the Taguchi method. An abrasive jet polishing (AJP) system has been newly designed and installed on a machining center. In order to determine the optimal polishing parameters for the BMG sample, four polishing parameters, namely the hydraulic pressure, the impact angle, the stand-off distance, and the polishing time were chosen as the factors of experiments. The optimal AJP parameters have been determined after carrying out the experiments based on the Taguchi’s L9 orthogonal array experimental results. These optimal parameters are the combination of the hydraulic pressure of 2 kg/cm2, the impact angle of 50o, the stand-off distance of 15 mm, and the polishing time of 60 minutes. The surface roughness can be improved from about Ra 0.13 μm to 0.044 μm by using the AJP optimal parameters. Besides, an analysis of variation (ANOVA) of the experimental data indicated that the polishing time and hydraulic pressure was the dominant parameters of the AJP process for the BMG material.