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The Dynamics Analyzing and System Optimization of CV Flying Shear

Author: YanHongJuan
Tutor: MengRongGuang；ZhangChaoYing
School: North China University of
Course: Mechanical and Electronic Engineering
Keywords: Clippers Drive System Cutting system Clutch Brakes System Optimization
CLC: TG333.21
Type: Master's thesis
Year: 2002
Downloads: 222
Quote: 2
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Abstract

Clutch (CV type) speed Bar-fold foot clipper small and medium line, bar rolling shop is one of the key equipment. With rolling the diversity of species, from low speed to high speed large section rolled slit rolling small section of the Clippers have become increasingly demanding, and its performance will directly affect the productivity of rolling workshop, taught rates and Length yield. This paper analyzes the CV-type flying shears movement characteristics, response characteristics, load characteristics and shear state characteristics, the use of elastic dynamics theory, a flying shear machine drive system and cutting system dynamics model, and qualitative analysis of the impact Clippers performance of the main factors. Made in the design of CV-type clippers should kinematic conditions necessary to meet the dynamic conditions but also to meet the optimal design ideas. Profiles for Shougang steel mill bar production line of two CV-type flying shears, the existing production process conditions, the operating status of the machine line integrated testing and fault diagnosis. Through the analysis of a large number of measured data, find out the CV-type flying shears law of motion and running, extracting the CV-type flying shears physical characteristic parameters identified in the practical application of the quality and impact of shear failure caused by a major reasons. On this basis, further discussion of the drive system and motor step excitation characteristic parameters, the energy dependence of the flywheel, clutch and brake of the CV-type flying shear as the core component, in practice, to change its parameters to the system characteristics. The CV-type flying shear system optimization design should meet the limits of the production process rolling conditions: 1) The rated torque at low speed clutch large section of maximum shear torque and high shear the maximum starting torque is based on the maximum OK; 2) high slit rolling shear, shear system flywheel energy should be a minimum of the objective function to optimize cutting system structure size to ensure that the step response and dynamic braking rapidity, thus contributing to the system Exercise and movement control reliability; 3) low shear large section shall be satisfied when the system is large enough flywheel energy requirement that the flywheel drive system by optimizing the structure parameters to ensure its step excitation characteristics. Through the practical application of CV-type flying shear machine performance analysis, flying shears drive system and cutting system optimization program, and proposed to improve the system startup and braking performance, avoid exercise effective intervention measures and methods.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal pressure processing > Rolling > Rolling mill machinery equipment > Rolling auxiliary equipment > Shears
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