Optimum Forging Preform Shape Design by Interpolation of Boundary Nodes

In the present paper, a new method for forging preform design has been developed based on linear interpolation technique. The use of preform shapes obtained by this technique would result in enhancement of the geometrical and mechanical quality of final part. It was found that among the obtained preform shapes there exists one preform that gives more uniform accumulated equivalent plastic strain. Using plasticine as an ideal material to validate the findings it is shown that by the use of this optimum preform shape, the geometrical defects such as under filling and fold over defects may be eliminated in the final product. In addition, a more uniform strain distribution through final part is achievable. Therefore its metallurgical and mechanical properties are improved.