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The Effect of the Drawbead Shape on the Sheet Metal Forming Process

드로우비드 형상에 따른 박판 성형공정에 미치는 영향에 관한 연구

Jeong, Dong-Won;Lee, Sang-Je
정동원;이상제

  • Published : 2000.06.01

Abstract

In the sheet metal forming process, the drawbead is used to control the flow of material during the forming process. The drawbead provides proper restraining force to the material and prevents defe cts such as wrinkling or breakage. For these reasons, many studies for designing the effective drawbead have been conducted. In this paper, the effect of the drawbead shape will be introduced. For the analysis, the numerical method called the static-explicit finite element method was used. The finite element analysis code for this method has been developed and applied to the drawbead process problems. In result, convergence problem and computation time due to large non-linearity in the existing numerical analysis methods were no longer a critical problem. Futhermore, this approach could treat the contact friction problem easily by applying very small time intervals. It is expected that various results from the numerical analysis will give very useful information for the design of tools in sheet metal forming process.

Keywords

Sheet Metal Forming Process;Restraining Force;Static-Explicit Method;Convergence Problem;Non-Linearity

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