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A Numerical Study on formability improvement by adjusting blank holding force  

Choi, Hyun-Seok (Graduate School, Department of Mechanical Engineering, Korea Univ, Molds&Dies Technology R&D Department, KITECH)
Chung, Wan-jin (Department of Mechanical System and Design Engineering, Seoul National University of Science and Technology)
Publication Information
Design & Manufacturing / v.10, no.1, 2016 , pp. 31-35 More about this Journal
Abstract
In sheet metal forming process, drawing is typical process. And the key factor of drawing is blank holding force (BHF) A low BHF can cause wrinkling, whereas a high BHF can cause fracture during a deep drawing process. Thus, formability can be influenced by application appropriate BHF. In this study, a variable blank holding force (VBHF) is applied to extend the forming limit by avoiding both wrinkling and fracture. To determine VBHF in drawing process, numerical simulations and statistical analysis are carried out using commercial FEM software.
Keywords
Drawing process; Variable Blank Holding Force; Finite Element Analysis; Statistical Methods;
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  • Reference
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