Reverse simulation using the simulation block technique and its application in the precision forging process

Abstract Referring to die forging as an example, the so-called reverse simulation of the forming process, regardless of whether it is hot or cold forging, is executed. Separating imaginarily the two half-parts of the forging die from their closed position, they move apart from each other progressively. As they move, material in the die cavity deforms and results in an opposite movement to that of the normal forming process. Finally an initial billet or a simplified preform forging is obtained. In this paper, basic points in the execution of reverse simulation with UBET are described. For the purpose of easy execution, a new approach named the Simulation Block Technique (SBT) is introduced. Example of successful applications in practice using the above methods are presented.