Abstract
A method has been developed for predicting the drawcavity shape of a draw blank during the blankholder closed, predraw punch impact stage in the sheet metal draw stamping process. By selecting and progressively feeding particular increments of a proposed set of blank holder surface displacements as input boundary conditions, the nonlinear shell computer program developed by Ford Research is utilized to accurately predict the deformed shape of a blank during this stage. The method and computer program have been successfully applied to several symmetrical body panels on an experimental basis. Further work is required to both expand the scope and provide a practical system for the production engineering of sheet metal stampings. However, this method represents a step forward to computerized predictive binder design.
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Tang, S.C. Computer prediction of the deformed shape of a draw blank during the binder-wrap stage. J. Applied Metalworking 1, 22–29 (1980). https://doi.org/10.1007/BF02833902
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DOI: https://doi.org/10.1007/BF02833902