132 Cutting Characteristic of Polycarbonate Sheet Subjected to Wedge Indentation by Knife Edge Plate

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  • 132 溝刃付き面板を用いたPC材の突切加工特性(塑性加工とその周辺技術)

Abstract

Asymmetric plunge cutting by using grooved knife edge plate was proposed for advanced die cutting of a polycarbonate (PC) sheet. By varying the tip angle α_U and the tip thickness wv of knife edge in the counter plate, and combining a standard steel cutting rule of 42 degree center bevel blade, a cutting load response of PC sheet was investigated and also that deformation was observed through a CCD camera. Through this works, the followings were found : 1) there were two deformation modes of sheared profile. 2) the tip thickness W_U was a primary factor, compared to the tip angle of α_U. 3) the equivalent wedge angle effect was revealed with respect to the upper/lower angles α, α_U, while the PC sheet was bent up by the lower knife indentation.

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