Experimental and Analytical Study of Drawbead Restraining Force for Sheet Metal Drawing Processes
In recent years, implementation of aluminum alloys, advanced high strength steels and ultra high strength steels is quickly increasing in automotive components due to their superior structural performance and vehicle weight reduction capabilities. However, these materials often have more limited formability compared to broadly used mild steels. Design of the sheet metal drawing process requires accurate information about the restraining forces distribution usually accomplished by a set of drawbeads positioned along the perimeter of the die cavity. This study is targeting bringing together the results of analytical models, results of finite element analysis and experimental data in attempt to understand the most critical factors influencing the restraining force. The experimental study of the restraining force was performed using drawbead simulator tool installed into Instron tensile testing machine.