王新云夏巨諶：汽車飛輪盤沖鍛成形工藝研究081113(存儲版)
【正文】 g methods. This paper proposed a new stampingforging process. The forming process and mold parameters were optimized utilizing DEFORM2D. In order to shape the inner fillet of R5, a forming process with twostep was designed. A drawingpunch with bigger fillet drew the billet and an upsettingpunch pressed the wall first, and then the drawingpunch was replaced with another one which had a fillet of R5 and the wall was pressed until reaching the size requirements. The results are well shown that it could provide a theoretical basis to the practical industrial production.Keywords: stampingforging process。圖1為沖鍛成形與焊接成形過程的比較示意圖。為減小成形力，可在坯料成形之前先將中心孔沖出，用以分流降壓?？紤]到坯料與模具間的熱力耦合，選擇變形與熱傳導模塊，模具與坯料間熱傳導系數(shù)為11W/(m2K），(m2K）。而零件所要求的內圓角半徑為R5，為避免在該處的切削加工，這就要求在拉深結束，鐓粗過程中更換拉深凸模，作為型腔，以成形內圓角。 a）拉深成形圖 b）鐓粗折疊圖4 拉深凸模圓角半徑為R5時的成形情況 確定更換拉深凸模的時間確定更換拉深凸模的時間，即確定預成形終了時的成形程度，對最終的成形結果也有十分重要的影響。用不同預成形拉深凸模進行拉深成形，最終成形結果也不同。（2）借助有限元模擬軟件DEFORM2D，分析探討了金屬流動規(guī)律，討論了拉
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