Numerical Modelling of Drawbeads for Forming of Aluminium Alloys

10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes

Joshi, Y.^1 ; Christiansen, P.^2 ; Masters, I.^1 ; Bay, N.^2 ; Dashwood, R.^1

WMG Centre HVM Catapult, International Manufacturing Centre, University of Warwick, Coventry

CV4 7AL, United Kingdom^1

Department of Mechanical Engineering, Technical University of Denmark, Kgs. Lyngby

2800, Denmark^2

关键词: Drawbead;    Drawbead designs;    Drawbead model;    LS-DYNA;    Plane strains;    Restraining force;    Stamping tools;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/734/3/032082/pdf
DOI  :  10.1088/1742-6596/734/3/032082

来源: IOP

【 摘 要 】

The drawbeads in stamping tools are usually designed based on experience from the forming of steel. However, aluminium alloys display different forming behaviour to steels, which is not reflected in the drawbead design for tools used for stamping aluminium. This paper presents experimental results from different semi-circular drawbead geometries commonly encountered in automotive dies and compares them to those obtained from Stoughton's analytical drawbead model and the 2D plane strain drawbead model set up using LS-DYNA. The study was conducted on lubricated NG5754 strips. The results presented are in terms of drawbead restraining force versus strip displacement, as a function of drawbead depth. The FE drawbead model agrees well with the experiments whereas the analytical model overpredicted the drawbead forces.