Contact Stability on Cutting Characteristics of Polycarbonate Sheets Subjected to Two-Line Wedge Indentation

Abstract

This paper describes a pushing cut process of a piled-up polycarbonate (PC) sheet. Resin laminated sheets such as thermal insulation films or liquid crystal panel are recently processed by using a wedge indentation due to its production efficiency and its precision cutting. However, deformation of laminated resin sheet is often unstable during cutting or creasing process, and its dynamic behavior is not sufficiently revealed. In this work, the cutting line force of several center bevel blades was measured by load cells, and the cutting deformation of the PC sheet was observed by a CCD camera in order to reveal the effect of blade tip profile and the contact condition. The deformation flow in the side view of the PC sheet was observed with respect to the blade indentation by varying the blade tip angle, the feed velocity and the surface contact condition.