振动裁切的机理与应用研究

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (3) : 88-91,9.

论文

振动裁切的机理与应用研究

武吉梅1；侯玉鹏2 ；马利娥1

作者信息 +

Vibration cutting mechanism and its application

WU Ji-mei1； HOU Yu-peng2； MA Li,e1

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摘要

从运动学方面对比分析了普通裁切与振动裁切过程中裁刀与纸叠间的相对运动关系。通过分析知，实现振动裁切效果的前提条件是裁切速度小于裁刀的最大振动速度，二者的相对关系决定了一个振动裁切周期内的裁切时间。裁切速度越小，振动频率越高，每一振动裁切周期内的裁切时间越短。振动裁切过程中产生的脉冲裁切力与纸张剪应力、裁刀振动周期、裁切时间以及裁切厚度有关。振动裁切优于普通裁切效果的原因是，脉冲裁切力的细微分割效果减小了一次性裁切面积，从而降低了裁切抗力，提高了裁切质量。

Abstract

The relative movement between the cutting tool and the paper stack was compared based on the kinematics analysis of the ordinary and vibratory cutting process respectivly. The prerequisite of realizing the vibratory cutting effect is that the cutting speed is smaller than cutting tool's maximum vibration velocity, which is known from the analysis, and the relative size of the two parameters decides the cutting time in a vibration cutting cycle. The smaller the cutting speed is and the higher the vibration frequency is, the smaller the cutting length is in a vibration cutting cycle. The impulsive cutting force, which is created in the vibratory cutting process, is related to the paper shearing strength, vibration cutting cycle, cutting time as well as cutting length. The reason of the vibratory cutting effect surpassing the ordinary cutting effect is obtained as follows. The slight division effect of impulsive cutting force reduces the cutting area in a vibration cutting cycle, thus reduces the cutting resisting force, and the cutting surface quality is improved.