| Summary: | 碩士 === 國立聯合大學 === 機械工程學系碩士班 === 105 === This study aims to investigate the roughness of carbon steel through CO2 laser removing. In order to reduce experimental cost and time, using the Taguchi method to optimize the parameters and also using the signal-to-noise with analysis of variance to find the important factors and the best combination of parameters which affect the surface roughness. The control factors are: (A) laser power, (B) processing speed, (C) focal distance, and (D) carving step. Each control factors has three levels. The results show that the optimal combination of laser removing is (A3B1C2D1). The control factors affect the processing quality are A>D>C>B. Furthermore, this study also discusses the vibration of carbon dioxide laser machine by the finite element analysis (FEA) and also using the laser vibration meters to measure the vibration when using the CO2 laser machine. The results show that the practical measurements aren’t the same with the theoretical values. Therefore, it doesn’t cause the resonance when using the CO2 laser machine.
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