| Summary: | 碩士 === 國立勤益科技大學 === 工業工程與管理系 === 107 === The raising broaching machine is the machine tools to process the surface and one-cut shape and it is the one of the most critical machine tools for processing the inner surface of the sprocket plate. The quality of the raising broaching machine directly affects the quality of the processed products; on the other hand, the quality of the processed products can be used to reflect the quality of the raising broaching machine. This study applies the six sigma quality index to establish a process quality level analysis chart that can simultaneously evaluate the quality characteristics of small-the-better (STB), large-the-better (LTB) and nominal-the-best (NTB) types. This analysis chart uses the accuracy index as the horizontal axis and the precision index as the vertical axis to evaluate if the quality level of the process quality, accuracy and precision meet the standard and finally aims at the quality characteristics to make the process improvement. Therefore, this analysis chart can not only help the broaching machine purchasers to analyze the quality of the processed products which are manufactured by the broaching machine and find the critical to quality (CTQs) needed to be modified for process improvement. Meanwhile, the related feedback is given to the broaching machine manufacturers to offer the better product design and reasonable tolerance design to confirm the quality level of the process and further advance the quality of tool machines for improving process capability and industrial competitiveness with the broaching machine purchasers.
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