The Optimization Of Large Cross Section Profile Crank Type Flying Shear Design And Key Technology Research

Profile production line project in China is being launched in large quantities,especially large-scale wire rod production line accounted for a larger proportion.The large wire rod production line of high-speed heavy crank flying shear allimported from abroad, from the perspective of conducive localization andmaintenance, we need to reload the crank flying shear in-depth study. However,to accurately study a flying shear, we must have a deep understanding of flyingshear structure with the working principle, accurate understanding of the shearforce and shear power while cut workpieces.Based on this background, we conducted a large cross-section profilescrank flying shear design theory and technology research. The main contentsare as follows: Integrated crank fly shear size and transmission system, theshear mechanism optimal design, the optimal size of the flying shears shearmechanism; Shear mechanism after optimization dynamic simulation to derivedprecise acceleration time, cut time and the time of the end of the cut, study oncutting mechanism of size on the Clipper cutting edge tracks, speed effects;Through the shear force analysis of the herringbone blade during the shearingprocess, using the equivalent component crankshaft, obtained the relationshipbetween the angular velocity of the crankshaft and the moment of inertia androtational torque, and determine the kinetic equation in the flying shear shearingprocess; With LS-DYNA finite element analysis software for numericalsimulation of flying shear process, better understanding of rolling material,diameter, shear velocity on shear force effect; By site measurement of shearforce, analyzed and compared with finite element analysis results and theoreticalresults of a formula, and quantitative analysis of the speed drop.Through the study of the subject, can greatly improve the efficiency in theuse of the flying shears, simplify the mechanical structure, improve the qualityof cross-section, has a very important practical significance to increaseproduction, reduce energy consumption, improve enterprise efficiency.