Advanced high speed form processing with respect to a multiple-layered flexible thin sheet

利用本基金引进的高速摄像机对厚纸板和AC树脂厚板的剪切过程进行了监测。揭示了AC厚板的一些开裂形态，其剪切性能与冲头速度和间隙有关。最近发现，当考虑交叠间隙时，AC板的开裂模式是可以控制的。当楔形叶片受到超声振动激励时，其激励方式可从几种指定的模式中选择，从而提高了PC树脂板材剪切轮廓的稳定性。利用楔形叶片的超声振动来激活AC厚板的部分熔化区。这种现象对于稳定切割厚板是有利的。然而，它的最佳条件还没有被揭示。利用所介绍的高速摄像机，可以分析落卡运动。这对于了解动态行为…很有用针对瓦楞纸板结构的变形特点，提出了一种新的力学性能模型--组合模型。该组合由正交各向异性弹性衬垫(基于面内拉伸试验)和各向同性弹塑性介质(基于环形压碎试验)组成。在此模型的基础上，利用有限元程序对三维旋转压痕进行了分析。这一模拟结果与台架试验的内衬和介质的挠度相似。对于脆性树脂和弹性橡胶模型，我们建立了曲线拟合的非线性弹性模型和基于模式的开裂模型(VCCT)。对叶片在工作板上的浅压痕进行了数值分析，其结果较好地解释了实验中的破裂行为。一种新的方法：开发薄膜切割模具为了在不压碎刀具边缘的情况下切割一层薄的PET薄膜(厚度为15um，25um)，设计了几个波形刀片，并在原始模具(一种新的模具结构)上实现了该方法。它的切割性能将在各种研讨会上展示。较少

Monitoring of cutting motion and diagnosis of imperfect separation stateShearing process of thick paperboard and AC resin thick sheet was monitored using the high speed camera introduced by this fund. Some cracking patterns of AC thick sheet were revealed and the shearing performance depended on the punch velocity and the clearance. It is recently revealed that the cracking patterns of AC sheet are able to control when the overlapping clearance is considered. When a wedge blade is excited by the ultrasonic vibration, and its excitation mode is chosen from several specified patterns, the stability of sheared profile of PC resin sheet is increased. Partially melted zone of AC thick sheet is activated by using the ultrasonic vibration of a wedge blade. This phenomena is superior for stably cutting the thick sheet. However, its optimal condition is not revealed yet. Using the introduced high speed camera, a card dropping motion can be analyzed. This is useful for knowing a dynamic behavior … More of the card collided to acounter floor.SimulationRegarding the deformation characteristics of a corrugated fiberboard structure, a new mechanical properties model called as the combination model was introduced. This combination is composed of an orthotropic elastic liners (based on In-plane tensile testing) and an isotropic elasto-plastic medium (based on Ring Crushed Test). Usingthis model, three dimensional rotary creasing was analyzed using an FEM code. This simulation result was similar to a bench marked experiment with respect to the deflection of inner liner and medium. Regarding a fragile resin and a flexible rubber models, we have developed a curve-fitting non-linear elastic model and a pattern based cracking model (VCCT). Shallow indentation of blade to the worksheet was numerically analyzed and its results fairly explained about the experimental cracking behaviors.A new method: development of thin film form cutting dieIn order to cut off a thin PET film (a thickness of 15um, 25um) without any crushing of cutter edge, several waveform blades were designed and implemented to an original die set (a new die structure). Its cutting performance is going to be presented in various workshops. Less