Application of spiral channels in abrasive flow machining

• Main Authors: hsiao-hsuan chiu, 邱筱軒
• Other Authors: A-Cheng Wang
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/09449427274381964959

碩士 === 清雲科技大學 === 機械工程研究所 === 95 === Abrasive flow machining (AFM) is a simple and economical polishing method. However, it is difficult to reach the uniformity of surface roughnesses because of the processing mechanism that polishes the workpiece with axial movements. Therefore, several spiral cores with different shapes are put in the machine to form various channels, that changes the processing mechanism of AFM from simple axial reciprocations to axial and radial ones. The influence of diverse channels on surface roughnesses is investigated in this research. Flow fields and strain rate changes of media flowing in channels are obtained by CFD-RC simulation to gauge the improvement in surface roughness. Results show variances in surface roughnesses in axial direction of the workpiece with a deep circular hole. Furthermore, it can be meliorated much both uniformity and the improving rate by placing a spiral core in the workpiece.