Finite element analysis on the coined-bead mechanism during the V-bending process
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Author list: Thipprakmas S.
Publisher: Elsevier
Publication year: 2011
Journal: Materials & Design (0264-1275)
Volume number: 32
Issue number: 10
Start page: 4909
End page: 4917
Number of pages: 9
ISSN: 0264-1275
eISSN: 1873-4197
Languages: English-Great Britain (EN-GB)
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Abstract
The coined-bead technique is commonly applied to solve the spring-back problem in the V-bending process. However, the coined-bead mechanism on the spring-back/spring-go feature has not been clearly identified yet. In this study, the finite element method (FEM) and laboratory experiments were used to investigate the coined-bead mechanism and its effects on the spring-back/spring-go feature. The features were clearly identified using a stress distribution analysis. The results revealed that the mechanism of the coined-bead technique not only increases the compressive stress on the bending allowance zone, where the spring-back feature decreases, but also increases the reversed bending zone on the leg of the workpiece, where the spring-go feature increases. Therefore, after compensating for the increases in the compressive stress and the reversed bending feature, the amount of spring-back on the bent part was decreased. The FEM simulation bending force and bending angle results were agreed with those from the experimental results. ฉ 2011 Elsevier Ltd.
Keywords
Elastic behavior
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