| Summary: | 碩士 === 國立聯合大學 === 機械工程學系碩士班 === 101 === In recent years, smart phones become popular modern communication tools, taking into account the quality of the product and function, the manufacturer must be thinner mobile phone panels. For strength and life cycle of the demand, deeper glass reinforcing layer, increases the difficulty of processing technology. High speed CNC machine tools for processing tempered glass panel, with the testing standards improved, has been unable to achieve both quality and efficiency. This study investigates the optimal parameters of drilling process for tempered glass material by ultrasonic vibration assisted CNC machining. Using Taguchi methods, the optimal parameters for reducing burrs and machining time can be obtained based on drilling burrs less than 0.10 mm and machining time less than 50 second for initial machining. The control factors include: (A) the particle size of tool, (B) spiral feed rate, (C) tool angle of spiral operation, and (D) vibration amplitude. Three levels of each control factor establish the L9(34) orthogonal array. The influence and contribution of each contol factor are observed by the analysis of signal-to-noise ratios (S/N) and analysis of variance (ANOVA). The results demonstrate the optimal combination of process parameters is (A3B1C1D3). The control factors affect the processing quality in order are A, C, B and D.
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