Transactions of Materials and Heat Treatment

Title：Research on establishment method of BHF forming window

Authors： CHEN Yu-long JIANG Min ZHAO Shi-yu ZHAN Yan-ran

Unit： Fuzhou University Ningde Vocational and Technical College

KeyWords： sheet forming blank-holder force forming window numerical simulation critical wrinkling critical fracturing

ClassificationCode：TG386

year,vol(issue):pagenumber：2013,38(3):42-46

Abstract：

Based on the judgments of critical wrinkling and fracturing condition analysis, a method was proposed to build the forming window aiming at the variable blank-holder force (BHF) forming. In order to obtain a larger area of forming window, two extreme BHF loading modes were designed, namely the Z and inverse Z loading mode. And then, the boundary of forming window for a cylindrical cup was got by numerical simulation. Research results show that different extreme BHF loading modes lead to the different forming windows. Considering the safety and reliability, BHF loading curve can be chosen among the intersection of multiple forming windows.

Funds：

福建省自然科学基金资助项目（2008J0153）；福建省教育厅A类项目（JA12453）

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