Abstract
In this work, a methodological scheme for a reduction of both the try-out and lead-time of complex stamping/draw dies is presented, since it is commonly known that dies and punches are deformed during stamping process leading to changes in the shape and making very costly their manufacturing. The finite element simulation of the system press/tool behaviour along the stamping process results in criteria for the best design of high-cost dies/punches. Die deflection during the pressing process is, in this work, investigated in order to correct the sculptured surfaces of the die or punch in the manufacturing, specifically the finishing milling pass stage. With the proposed methodology, die manufacturers are able to avoid errors coming from die deformation due to their asymmetrical shape, in a systematic form. At the same time, time of manual adjustment and polishing is reduced in a 30%. Examples are deeply explained as well as experimental evidences. Modifications of the main geometry, components and functional parameters are so recommended.
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