| Summary: | 碩士 === 國立雲林科技大學 === 工業工程與管理研究所碩士班 === 91 === Carbide possess high strength and hardness, it is a proper material for cutting tool and mould. Since the excellent mechanic properties of the carbide that make it difficult for shape forming, the conventional machining would dissatisfy the multiplicity, complication and precision machining. Electro-discharge machining (EDM) machining performances independent the materials hardness, so it satisfies for machining the materials of high strength and hardness such as carbide. The machining accuracy of wire electro-discharge machining (WEDM) well suits to the mould manufacture and design specially applied in high strength materials machining. The breakage of WEDM would disturb machining process that will obvious increase the production cost, reduce the efficiency and deteriorate the precision. So it is an important subject to prevent the wire breakage for WEDM.
The present research proposes an integration mechanism of WEDM with ultrasonic machining (USM). In the integration mechanism used an ultrasonic transducer attaches to WEDM device that excited the wire electrode of WEDM. Then using the integration mechanism conducts the experimental study with specimen material of ceramics, in this study proposes Taguchi experimental method that primary chooses the important machining parameters and various levels of each parameter. We propose the orthogonal combination experiment and ANOVA (analysis of variation) to obtain the maximum MRR, and the lowest surface roughness. Concern with the pattern of wire breakage to propose the specific and available prevent method to modified the machining performance of WEDM by this integration mechanism of WEDM with USM to promote the industrial application.
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