FE FORMING MODELS INCLUDING PRESS BEHAVIOR ALLOW FOR REALISTIC COMPUTATION OF BLANKHOLDER FORCES

Modeling the elastic and dynamic influences on the drawing part was and is a major re- search object in many finished and ongoing research projects conducted by the authors. As a result, new simulation models are available which allow for implementing the machine's properties into the process simulation of deep drawing and help to increase its prediction accuracy. A more precisely computed tool surface allows for resource efficient manufacturing since material use, machine hours, work force, and even the number of production tools due to higher potential drawing ratios can be reduced. In particular, proper- ties, advantages and disadvantages of the simulation methods are discussed and the modeling procedures are specified. The potential of the advance forming process models was demonstrated for practical issues from the die spotting stage. Those include predictions of part-specific cylinder forces, virtual die spotting and adjusting the local lubrication on the tool's surface.