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An Optimal Control Method of Rolling Temperature for Reversing Mill
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A technology of optimal control and rolling temperature, applied in the direction of temperature control, metal rolling, etc., can solve the problems of poor control of rolling temperature, influence of surface quality and shape accuracy, etc.
Active Publication Date: 2020-03-06
BAOSHAN IRON & STEEL CO LTD
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[0011] The purpose of the present invention is to provide an optimal control method of rolling temperature suitable for reversible rolling mills. The present invention starts from the optimization of rolling process and provides a pass reduction method suitable for reversible mills with rolling temperature control as the goal. The comprehensive optimization technology of weight and tension realizes the optimal control of rolling temperature, improves the outlet surface quality of the strip and the rolling stability during the strip rolling process, and is used to solve the current problem of rolling in the reversible rolling process. Poor control of the manufacturing temperature leads to the problem that the surface quality and shape accuracy of the strip are affected
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Embodiment 1
[0095] In this embodiment, a typical specification of S302 stainless steel material is taken as an example, wherein the strip steel inlet parameter is 820×1.5 mm, and the finished strip steel thickness is 0.5 mm.
[0096] (a) Parameter collection:
[0097] (a1) Collect the rolling process parameters of the reversible unit, mainly including: incoming strip thickness H=1.5mm, strip exit thickness h=0.5mm, strip width B=820mm, strip yield strength K=235MPa, strip The average deformation resistance K of the material m =460MPa, surface initial temperature T 0 =26°C, strip density ρ=7800kg / m 3 , Specific heat of the strip S=470J / (kg·℃), exit speed v of each pass of the strip i ={85.57, 157.26, 246.75, 372.22, 504.9, 733.44, 954.52, 1075.42} m / min; (i means pass)
[0124] (a1) Collect the rolling process parameters of the reversible unit, mainly including: incoming strip thickness H=2.01mm, strip exit thickness h=0.58mm, strip width B=850mm, strip yield strength K=260MPa, strip The average deformation resistance K of the material m =520MPa, surface initial temperature T 0 =27.2℃, strip density ρ=7800kg / m 3 , Specific heat of the strip S=470J / (kg·℃), exit speed v of each pass of the strip i ={92.45, 162.3, 272.5, 390.6, 526.5, 769.6, 980.1, 1198.0} m / min; (i means pass)
[0125] (a2) Collect the roll process parameters of the reversible unit, mainly including: work roll radius R = 203.9mm, surface roughness Ra r =0.32μm, work roll elastic modulus E=206GPa, work roll Poisson's ratio ν=0.3;
[0126] (a3) Collect the process parameters of the emulsion, mainly including: the flow rate of the emulsion w=1100L / min, the initial temperature T of the emulsion c =58°C, the concentration C of the emulsion = 4...
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Abstract
The invention relates to a rolling temperature optimal control method suitable for a reversible rolling mill. The control method is characterized in that rolling reduction and tension of each pass areoptimized and set so as to realize the optimal control over the rolling temperature. The invention optimizes the rolling technology and provides the technology of comprehensive optimization of rolling reduction and tension of the passes, and the technology is suitable for the reversible rolling mill unit and aims to control the rolling temperature. According to the control method, the optimal control over the rolling temperature is realized, the exit surface quality of strip steel is improved, the rolling stability of the strip steel in the rolling process is improved, and the problem that inthe existing reversible rolling process, the control over the rolling temperature is poor so that the surface quality of the strip steel and the precision of the shape of the strip steel can be influenced is solved.
Description
technical field [0001] The invention relates to the field of reversible rolling, in particular to an optimal control method for rolling temperature suitable for a reversible rolling mill. Background technique [0002] The patent "Optimization method for reduction procedure applicable to five-stand UCM type cold tandem rolling mill" (application number: CN201210083834.4) considers the problems of rolling load balance, slipping and thermal scratch prevention, taking into account the plate Comprehensive control of shape and plate crown, so as to realize the optimization of the pressing procedure; [0003] The patent "Optimization Method of Process LubricationSystem Aiming at Prevention and Control of Pitting in Cold Continuous Rolling Mills" (Application No.: CN201310562473.6) is to prevent and control fuzzing by optimizing the process lubricationsystem; [0004] Patent "Comprehensive optimization control method for rolling schedule of cold strip continuous rolling mill" (ap...
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