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This paper reports for fundamental relationship between tip thickness of crushed cutter and thickness of indented sheet. By varying the tip thickness of trapezoidal center bevel cutter, the resistance of cutter indentation and the shared profile of aluminum sheet were inventigated experimentally. For discussing the deformation mechanism in the necking stage, Hill's solution with slip line theory and finite element analysis with elasto-plastic model were applied to this wedge indentation. The derived results were as follows : the load response after the local maximum point of the cutting force is characterized by the necking mode due to the wedge effect of cutter; the necked height of sheet material varies with the tip thickness of cutter; the occurrence limit of necking deformation exists in terms of the sheet thickness; the line force at the deflection point is varied with the tip thickness of cutter, but not with the sheet thickness; the residual sheet thickness beneath the cutter tip depends on the tip thickness of cutter.

Load Caracteristic and Deformation Mechanism of Trapezoidal Center Bevel Cutter Indentation to Aluminum Sheet