具凸緣及壓扁特徵扣件成形製程分析

Forming Process Simulation for Fasteners with Flange and Flatten Features

許進忠(Sheu, Jinn-Jong) ； 陳靖(Chen, Jing) ； 張晉誠(Chang, Chin-Cheng) ； 余征諴(Yu, Cheng-Hsien)

《鍛造》 27卷4期 (2018/12) Pp. 13-20

摘要

扣件成形主要依產品幾何特徵設計各道次製程，本文討論具凸緣及壓扁特徵之扣件成形製程參數，並探討不同特徵成形之交互影響。以田口法討論製程參數對凸緣成形性之影響程度，製程參數包括特徵尺寸、材料模型及成形條件，並以CAE進行分析以找出最具影響力之設計因子。另進行端部壓扁成形分析，評估壓扁時材料流動所造成凸緣尺寸變異，並利用複動成形拘束壓扁時之材料流動，以降低凸緣變形量，將可提升凸緣與壓扁特徵之尺寸精度。

關鍵字

法蘭成形 ； 田口分析 ； 有限元素分析

並列摘要

The fastener forming is mainly designed according to the geometric characteristics of the product. This paper discusses the fastener forming process parameters with flange and flattening characteristics, and discusses the interaction effects of different feature forming. The effect of process parameters on the formability of the flange was discussed by Taguchi method. The process parameters included feature size, material model and forming conditions. The most influential design factors were identified by CAE analysis. In addition, the end flattening analysis is used to evaluate the flange size variation caused by material flow during flattening. The multi-action forming restrains the flow of the material during the flattening to reduce the amount of deformation of the flange, and the dimensional accuracy of the flange and the flattening feature can be improved.