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http://dx.doi.org/10.5228/KSPP.2002.11.5.394

Drawbead Model for 3-Dimensional Finite Element Analysis of Sheet Metal Forming Processess  

금영탁 (한양대학교 기계공학부)
김준환 (한양대학교 일반대학원)
차지혜 (한양대학교 일반대학원)
Publication Information
Transactions of Materials Processing / v.11, no.5, 2002 , pp. 394-404 More about this Journal
Abstract
The drawbead model for a three-dimensional a finite element analysis of sheet metal forming processes is developed. The mathematical models of the basic drawbeads like circular drawbead, stepped drawbead, and squared drawbaed are first derived using the bending theory, belt-pulley equation, and Coulomb friction law. Next, the experiments for finding the drawing characteristics of the drawbead are performed. Based on mathematical models and drawing test results, expert models of basic drawbeads are then developed employing a linear multiple regression method. For the expert models of combined drawbeads such as the double circular drawbead, double stepped drawbead, circular-and-stepped drawbead, etc., those of the basic drawbeads are summed. Finally, in order to verify the expert models developed, the drawing characteristics calculated by the expert models of the double circular drawbead and circular-and-stepped drawbead are compared with those obtained from the experiments. The predictions by expert models agree well with the measurements by experiments.
Keywords
Drawbead Model; Sheet Metal Forming; Drawbead Restraining Force; Drawbead-exit Pre-srain; Linear Multiple Regression Method;
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