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The rail straightening Research Based on ANSYS

Author: YangWeiGuo
Tutor: ZhaoYunCai
School: Jiangxi University of Technology
Course: Mechanical Engineering
Keywords: Roller leveler Finite Element Residual stress ANSYS
CLC: TG335
Type: Master's thesis
Year: 2011
Downloads: 54
Quote: 1
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Abstract

As China's economy continues to grow, the state of the industrial sector also more and more attention to the rapid development of the steel industry, In addition, the rise of a variety of other industries, demand for steel increases, their rise, but also indirectly the promotion of the development of the iron and steel industry, and different industries are not the same type of steel demand, why, steel production, steel types continue to increase. While increasing production and steel types customer requirements for steel material quality is getting higher and higher, so producers out to increase production, more energy and financial resources should also be placed on the study of the quality of how improve steel quality, is the urgent need to solve the problem of each steel producers. An integral part of the straightening also improve steel quality process, improve steel flatness and to improve the steel stress plays a very crucial role. According elastoplastic theory i.e. steel after bending through larger elastoplastic, regardless of its starting curvature much difference will eventually converge, by setting the appropriate curvature of the steel repeatedly straightening , the curvature of the steel will be reduced, and ultimately achieve the purpose of straightening. Based on the elastic-plastic theory and application of dynamic analysis software ANSYS / LS-DYNA 38Kg heavy rail straightening model, the heavy rail web thickness of 13 mm, the yield limit of 645MPa, using the theory of large deformation straightening discussed lower rollers and upper roller roller fixed on four roll reduction. Found reduction measure and theoretical calculation of the amount of reduction and respectively the rail two different reduction i.e. finite element simulation quantitatively studied under two different reduction after straightening rail straightening effect as well as the impact of the stress distribution, and discuss some of the major factors in the actual production can not improve the rail quality. By comparing the results of two different reduction procedures, analysis, and replace the original pressed for money, the rail straightening residual stress, flatness better reduction procedures. Heavy rail roller straightening process method of combining the use of analytical calculations and computer simulations of the topics, a more in-depth study of eleven roller straightening process parameters, determine the relevant parameters of the roll system to simulate the heavy rail straightening process to obtain reasonable straightening parameters, the results provide a theoretical basis for the actual production in the straightening process parameters set to optimize the design and straightening machine and scientific guidance, and thus can shorten the product development cycle leveler, reducing production costs to adapt to the changing needs of the market, and promote the development of China's roller straightening technology. At the same time, the approach to the study of the subject to provide a new means of straightening the further development of the theory.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal pressure processing > Rolling > Rolling process
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