Drawbeads in sheet metal forming |
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Authors: | M Y Demeri |
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Affiliation: | (1) Ford Motor Company, Scientific Research Labs, 48121-2053 Dearborn, MI |
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Abstract: | Drawbeads are used to control the flow of sheet metal into the die cavity during stretch-draw forming of large panels. They
prevent wrinkling in formed panels, reduce the blankholder force, and minimize the blank size needed to make a part. Drawbead
restraining forces (pulling forces) and failure locations in the formed sheets are usually evaluated by using drawbead simulation
tooling. In this article, a drawbead simulation apparatus is used to assess the influence of variation in material, bead penetration,
and fric-tion conditions on the drawbead restraining force. Results from the test can be used as input for sheet metal forming
simulation programs. |
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Keywords: | computer simulation drawbeads forming |
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