Geometrical characteristics analysis of slant blades drum flying shear

ZHANG Yahui; BU Wanghui; XU Jun

doi:10.3969/j.issn.1001-196X.2025.05.010

Abstract：Slant blades drum flying shear is an important equipment of stripe manufacturing,and its performance directly affects production efficiency and cutting quality.Through the analysis of the geometry characteristics of slant blades drum flying shear,it is found that the variation regularity of blades'gap on different sections of the drums.At the middle of drum,the gap value is relatively larger than the two sides of the drum.Such difference is much bigger when the overlap of top and bottom blades or the slant angle is increased.By establishing a mathematical model for the unfolding line of the cutting curve of blades,it is found that the unfold line is a triangle function curve,and the engagement length was calculated by the integration method.The research results indicate that increasing the slant angle of blade can reduce the engagement length and cutting force,but it can also lead to uneven distribution of blades'gaps,which can easily cause blades'biting.Reducing the overlap of blades can improve the uniformity of the blades'gap.This article provides a theoretical basis for the design and modification of the slant blades drum flying shear,which is an important guiding significance for solving the problems of blades wearing and cutting quality in practical production.