| Summary: | 碩士 === 國立高雄應用科技大學 === 模具工程系碩士班 === 101 === Design of drill point die, preform design of billet and forming parameters of drill point are significantly affected the using life of drill point die on high speed self drilling screws which used in thick steel plate. In this paper, the main aim is to investigate the effects of the parameters in the drill point forming process, and its goals are to reduce the maximum forging force, forging energy and maximum effective stress of drill point die during forming process. This study uses CAD software (Pro/E), finite element software (DEFROM-3D) to analyze forming and die stress of the drill point. By using two-stage Grey-Taguchi method, the optimal parameters in drill point forming process can be obtained. From results of analysis, the maximum forging force, forging energy and maximum effective stress of the die for optimal forming process of drill point is about 24100N (26.3%), 28400N-mm (38.4%) and 460MPa (20.4%) lower than the original forming process of drill point.
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