Abstract
In this paper, we report on the dynamic cutting resistance of coated paperboard and the impact force on a blade tip during the pushing shear process. The cutting force on a blade was measured using a strain gauge by varying the rotation velocity NC of the crankshaft that controls the vertical motion of the blade. The transient cutting force of the blade was investigated in terms of the maximum cutting resistance ƒCmax, and the dynamic peak force ƒDmax after breaking down. As a result of the experiment, the impact factor υm=ƒDmax/ƒCmax of the cutting force was shown to be a function of NC, and the velocity dependency of the cutting resistance was found at the pushing stage. Furthermore, the release of the compressive elastic energy of the paperboard during the breakdown was discussed in relation to the variance of the dynamic cutting force.
