Abstract
This research treats with high precision shearing process for the plastic sheet. By performing the tensile test, the material characteristics of plastics were evaluated. Furthermore the Finite Element Method (FEM) analysis was performed for the shearing process of the plastic sheet. In addition, the optimum clearance between the punch and the die was examined for the machining condition affecting the cut end shape. The various stress distributions near the crack tip, the punch force strength and the appearance of shear plane were shown in the figures for the evaluation of the process. The optimum processing condition were discussed from those result.
