1426 印刷板紙の押抜切断挙動に及ぼす重合枚数と刃先形状の影響(S12-2 塑性加工の動向とその展開II,21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

抄録

In the processing process of white-coated cardboard such as a postal card, the cutting quality on wedged cardboards is empirically known as affected by the piled-up pieces of the cardboards, its friction coefficient, the thickness of coated layer, the blade tip specification and so on. In this work, the effects of mechanical conditions on the cardboard cutting characteristics were experimentally investigated by varying the blade apex angle, the surface roughness of the blade, the tip thickness and the piled-up numbers of cardboard. The followings were revealed: 1) the breaking down, local minimum point of cutting line force was characterized with the blade apex angle and the surface roughness or the tip thickness; 2) the blade indentation stroke for each layer depended on the piled-up numbers and its order; 3) the apex angle of 30 degree is stable for the release of break down layer, while the apex angle of 53 degree is fairly sticky state and unstable for that.