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Study on Modeling and Rolling Force Prediction Model for Hot Rough Rolling of 5052 Aluminum Alloy

Author: ChenZuo
Tutor: HuangChangQing
School: Hunan University
Course: Materials Processing Engineering
Keywords: Aluminum Hot rough rolling Mathematical model Rolling force Deformation resistance
CLC: TG339
Type: Master's thesis
Year: 2009
Downloads: 158
Quote: 1
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Abstract


Modern metal rolling process control is very complicated, it relates to pressure, velocity, flow, temperature and other large physical parameters, as well as elastic deformation, plastic deformation, thermal - mechanical coupling and other complex processes, internal organizational structure and properties of the workpiece and changes in multi- issues. From a control point of view, the metal rolling process with a typical multi-variable, non-linear, strong coupling properties. With aluminum rolling technology, the application of mathematical models in hot rough rolling system procedures set occupies an important position. Mathematical model is reasonable or not on the reduction of energy consumption during the rolling process, improving product quality has an important impact. Therefore, the design consistent with the actual mathematical model, in the actual production has a positive role and significance. A large number of domestic and foreign literature references to factory single twin coiling aluminum hot rolling mill hot rough rolling process mathematical model as the main line, the rolling temperature model, deformation resistance model, the rolling force model were studied. Firstly, single rack for aluminum hot rolling characteristics, in order to heat transfer theory, this paper analyzes the process of rolling temperature changes caused by rolling a major factor in heat radiation and convection, resulting from contact with the roll thermal conductivity and plastic deformation work, etc. the impact of changes in temperature, obtained during hot rolling aluminum temperature calculation model, and with the actual measured temperature contrast strip in good agreement. In order to calculate the temperature model rolling temperature deformation resistance as the basis for subsequent calculations. Secondly, by setting different deformation temperature, strain rate, in Gleeble-1500 thermal physics simulation machine on 5052 aluminum alloy single-channel inferior hot compression deformation experiments. Detailed analysis of the deformation temperature, strain rate and extent of deformation resistance of the material impact in the deformation temperature of 300 ~ 500 ℃, strain rate 0.01 ~ 20s-1 deformation conditions, through data fitting, establish its constitutive equations and determine thermal deformation material constants obtained 5052 aluminum alloy deformation resistance model. In the computer-controlled production of hot-rolled strip, rolling force setting is a very important part. It is the heart of the rolling process mathematical model, its settings will directly affect the accuracy of the quality of the strip. This article is based on the classic rolling theory, a detailed analysis of the rolling temperature, roll elastic flattening radius, stress state and deformation resistance coefficient on the impact of the rolling force and the establishment of aluminum hot rolling process mathematical model of rolling force . Basic control rolling force prediction error of 5% to 7% in between. This article determines aluminum strip rolling process mathematical model is feasible, basically achieve the expected requirements of the actual production rolling schedule setting and rolling force predictive control has a certain significance. This paper calculations were performed using MATLAB programming, on-site production to provide a reference for setting the actual production and optimization of rolling schedule has certain guiding significance.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal pressure processing > Rolling > Non-ferrous metal rolling
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