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Analysis of Roll’s Temperature and Stress Field in the Hot Rolling Process

Author: ZhaoZhiGuo
Tutor: ZhangXingZhong
School: Yanshan University
Course: Mechanical Design and Theory
Keywords: Roll Temperature field Stress field 3D coupled thermo Fatigue life
CLC: TG333.17
Type: Master's thesis
Year: 2011
Downloads: 137
Quote: 0
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Abstract


The rolls are the important components of the mill . The roll in the rolling process in a complex state of stress , especially hot strip mill roll poor working environment, with high - temperature rolling roll , the cooling water, and the support roller contact . Throughout the rolling roll to bear due to the contact stresses caused by the cyclical thermal stress caused by the cooling water , the rolling load , the shear stress and the residual stress, etc. . Production Practice has proved that the cracks , fatigue damage and spalling of the surface of the roll to roll fails to affect the life of the main reasons for which are closely related to the roll force status . If you can roll suffered a combination of factors such as temperature and load into account its stress , the causes of fatigue damage and crack do a more in - depth and comprehensive understanding of the mechanical model to create a line with the actual conditions and on this basis , to predict the fatigue life of the roll , and improve product quality to ensure smooth production . A hot strip mill work rolls , the subject is the object of study , from the analysis of change and stress change of the temperature of the heat transfer and mechanical angle of roll , and discussed based on the fatigue life of the roll . The details are as follows : First, using MSC.Marc finite element analysis software to establish a three-dimensional model roll and roll temperature field simulation stable rolling state temperature field ; Second, roll stability rolling state temperature field , consider rolling process rolling roller which are subject to the various loads to establish a rolling roll three-dimensional coupled thermo analysis model research roll stability rolling state of stress field distribution law ; Finally , discuss the roll failure in the form on the roll fatigue life prediction .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal pressure processing > Rolling > Rolling mill machinery equipment > Bodies and equipment of the mill primary columns > Roller and roller bearings
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