應用田口法於圓八齒T型銲接螺帽之成形模具改善

Improvement of the forming die for round clinch T welding nut by Taguchi method

許昭和(Hsu, Chao-Ho) ； 陳奕成(Chen, Yi-Cheng) ； 李沛璁(Li, Pei Cong)

《鍛造》 22卷4期 (2013/12) Pp. 31-38

摘要

圓八齒T型銲接螺帽為六道次複雜冷鍛成形，成形模具的幾何外型不同會影響成形過程。因此，為了取得良好的產品，成形模具幾何外型的優化設計是必要的。在本文中，利用有限元素方法與田口方法的基礎提出圓八齒T型銲接螺帽的成形模具優化，第五道次的最大鍛造負荷為目標函數。經由S/N比和變異數分析獲得最佳參數組合。由結果顯示，第五道次鍛造負荷有明顯的下降，並且降低了此道次後衝棒之最大等效應力。

並列摘要

The round clinch T welding nut is formed by six complex cold forming stages. The geometry of the forming die would affect the forming process of product. To obtain a good product, the optimization of geometry parameters of forming die is necessary. In this paper, an optimization is proposed for the forming die of round clinch T welding nut by based on the finite element method and Taguchi method. The maximum forging force of fifth stage is considered as the optimal objective. The optimal combination of parameters is obtained by S/N analysis and the analysis of variance (ANOVA). It is shown that, the maximum forging force and the maximum effective stress of back ejector are obviously reduced at fifth stage.