An analysis of drawbead restraining force in the stamping process
Journal
International Journal of Machine Tools and Manufacture
Journal Volume
38
Journal Issue
7
Pages
827-842
Date Issued
1998
Author(s)
Tszeng, P.-C.
Abstract
A theoretical model based on the virtual work principle was proposed to calculate the restraining force produced by the drawbead located on a stamping die surface. In the theoretical model the deformation of the sheet metal drawn over the groove shoulder or bead is assumed to be subjected to bending, sliding and unbending processes, and only the sliding process is responsible for the frictional force. The governing equations derived from the theoretical model were solved by a numerical procedure. In order to validate the proposed model, the finite element simulations were also performed to calculate the drawbead restraining forces for various steels. The simulated results together with the experimental data obtained from the published literature were compared with the predicted values calculated by using the numerical procedure. The good agreement between the simulated results, experimental data and the calculated values justifies the proposed theoretical model. © 1998 Elsevier Science Ltd. All rights reserved.
Type
journal article