Abstract
Abstract One quartz glass surface manufacturing case study by CNC machining center is proposed in this thesis. This study aims to optimize the design parameter for machining center to proceed the quartz glass surface manufacturing process based on Taguchi methods. First, we define the quality characteristic of the process, and then consider the noise factors in the system. The noise factors considered in this study include different quartz glass and various machining centers in the factory. Then, by discussing with the experienced engineers, the factors including grinding tools, cutting speed, feed rate and machining depth are selected as the control factors in the experiment. After setting up three levels for each of these control factors, we arrange nine experimental runs by orthogonal array to conduct the experiment. Implementation results show that artificial diamond grit size of grinding tools causes the most influence to the surface roughness of quartz glass. The lower speed level setting for feed rate could cause smaller surface roughness and slow cutting speed would make the roughness value bigger. It seems that there would be no strong evidence to show that machining depth would have obvious effect on surface roughness. Conclusions and suggestions in this thesis could not only be executed in this case but also be referred to future study for CNC machining center and quartz glass surface manufacturing process. Keywords: Taguchi methods, machining center, quartz glass, roughness