扣件成形製程與模具輔助設計系統之研發

鍛造產業已朝向高品質、短的訂貨交付時間、少量多樣及客製化等方向發展，為了因應此趨勢，數位輔助設計與設計客製化技術之研發已成為鍛造產業關注的研發主題。本研究針對螺絲類扣件產品，分析與歸納其形狀複雜度之變化，提出一種螺絲形狀分類指標，並考慮材料之成形極限與使用電腦輔助模擬驗證預成形設計，發展螺絲鍛品成形道次數預估方法與鍛胚幾何設計模型，以建構可提供螺絲形狀複雜度、成形道次數及預成形幾何等資訊之預成形設計系統。此外，考慮鍛胚與模具之關鍵尺寸，本研究也建立一個模具參數化設計之模型。本文所提之預成設計系統不僅可有效地預估多種螺絲鍛品之成形道次數，並可提供其預成形與模具設計之參考資料。

The forging industry has been heading toward high quality, short lead time, low volume and high variety, and customization. In response to these trends, the research and development of digital aided design and design customization techniques have been widely interested in the forging industry. This study analyzes and summarizes the changes in the shape complexity of screw fastener products to establish a classification rule of screw shape. By considering the forming limit of the material and using the computer simulation for verifying preform designs, the method for estimating the number of forming stages of the screw forging and the geometric design models of the forging products have been developed to construct a preform design system which can provide the information on the shape complexity of the product, the number of forming stages, and the preform geometry. This study also considered the critical dimensions of the workpiece and die to construct a parametric model for die design. The developed preform design system can not only effectively estimate the number of forming stages but also provide references for the preform and die designs for various screw forgings.