Research the Influence of Grit Size Polished on Work Surface

• Main Authors: Bien-Nguyen Van, 阮文邊
• Other Authors: Neng-Hsin Chiu
• Format: Others
• Language: en_US
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/04881063682396822233

碩士 === 國立高雄第一科技大學 === 工程科技研究所 === 95 === Polishing is a manufacturing process for surface-smoothing. The polishing process is based on the operation of applying a fine abrasive powder from a polishing wheel, with a relatively slow motion on to the work surface such that work surface roughness can be reduced. Polishing operated manually is time-consuming, high in cost and low in quality. If mistakes induced to during the process committed by a human operator may result in expensive re-working or even scrapping of the work surface. Usually, operator cost increases without increasing efficiency, which makes the process even more expensive. Polishing parameters such as rotational speed, feed rate, and abrasive concentration should be determined to efficiency when polishing is to be performance. The effect of the polishing parameters on the work surface was evaluated and optimum polishing conditions for minimizing the work surface were determined. The objective of this research is to determine the effect of polishing parameters. The study was especially focused on investigating the influence of grit size on work surface. Taguchi method is applied for the optimization of the finishing parameter. The surface finish parameter, namely, RZ (average of ten points) is considered as criteria for optimum. ii The experimental results, it indicates that the grit size is the most significant, with the contribution of grit size (66%); followed by rotational speed (4%), feed rate (27%) and variance error (3%). In addition, the results show that the processing parameters of the grit size 100# become the important controlling factors with conditions in the sub-stage of roughing stage which give highest contribution during the polishing action. The factors and levels selective method used by the Taguchi Methods are also shown to be superior to the traditional experimental scheme using the complete set of parameters.