New Method to Evaluate and Compensate 3D-Springback

A new method for evaluating and compensating springback is presented. It is based on prediction of the change in curvature after springback by the mechanics of the elastic recovery. Starting from the nodal coordinates and the stress and strain distributions predicted by the FEM simulation at the beg...

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Bibliographic Details
Main Authors: Ito, Koichi, Kondou, Tetsuya, Uemura, Gen, Mori, Naomichi
Format: Conference Proceeding
Language:English
Online Access:Get full text
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Summary:A new method for evaluating and compensating springback is presented. It is based on prediction of the change in curvature after springback by the mechanics of the elastic recovery. Starting from the nodal coordinates and the stress and strain distributions predicted by the FEM simulation at the beginning of springback, it first calculates the curvature and bending moments on the stamped sheet surface. Then, by modifying bending moment and curvature of sheet surface as well as process conditions it predicts an ideal sheet state at the beginning of springback. While predicting the ideal sheet state, it solves optimization problems to minimize springback defects with the aid of shape defect evaluation software named 'NXT Defect Evaluator'. The springback process from this ideal state is expected to generate the desired shape. Therefore, the ideal sheet shape is helpful when designing compensational tools and renewing the FEM model.
ISSN:0094-243X
DOI:10.1063/1.2741017