Study On The Control Of The Head,Tail And Edge Shape Of Aluminum Alloy Plate Rough Rolling

Aluminum and aluminum alloy materials have advantages in different aspects,such as smaller density,specific strength and hardness,abrasive and corrosion resistance and easier being processed and other performance advantages,as a result,in the transportation,aerospace,construction and bridges and other industrial areas they obtain a rapid development and application.The largest output of Aluminum and aluminum alloy processing and most widely used is aluminum and aluminum alloy strip.Rough rolling is the initial stage of aluminum strip rolling process.It is important to study the deformation and influencing factors of the head,tail and edge deformation of the strip during the rough rolling process.This article takes the project named “hot-rolled aluminum strip rolling process design and optimization software development” as the background,which is owned to China Erzhong Group(DeYang)Heavy Industries Co.,Ltd.Taking the 3003 and 5052 aluminum alloy materials as the main research object.Variable end face continuous reversible rolling simulation analysis,and thesimulation of the influence of the vertical roll rolling on the edge,which have been focused on during the rough rolling process of aluminum alloy plate.Then focus on the development of machine vision based on the blank shape detection system software.The hot compressive experiments of aluminum alloy materials were carried out on Gleeble 3800 thermal simulator.The real stress and strain curves under different temperature,strain rate and deformation were tested by using JMat Pro software.The physical parameters of the thermal conductivity,specific heat capacity,elastic modulus and Poisson's ratio of the aluminum alloy were calculated.The air temperature and temperature drop curves of the aluminum alloy were measured by the design experiment,two kinds of aluminum alloy surface Heat transfer coefficient.In order to study the head and tail double drum defects in the process of rough rolling of aluminum alloy,the prediction model of head and tail resection and the analysis of variable end face rolling process,rigid-plastic finite element analysis method has been used through Deform software.The results show that the influence of slab thickness and single pass pressure on the head and tail deformation can be analyzed and the prediction formula of head and tail resection can be obtained.By establishing the trapezoidal end face,the results show that the prediction model of head and tail resection can be compared with the actual production site measurement results,and the prediction model is validated by using the continuous reversible rolling model of the face aluminum alloy.The results show that the deformation depth of the head and the drum is affected by the slab reduction and the thickness of the slab,the linear change is obtained under the single deformation and the variable end face can obviously cancel the process of partial drum deformation,Head and tail resection;head and tail resection prediction model is similar to the actual production measurement results,the prediction model has good practicability.In order to make analysis of the influence of the edge deformation through vertical roll rolling on of the slab,Deformation software was used to establish the three-dimensional model of the whole rolling process without vertical roll rolling.And the influence on the depth of the drum of the technological parameters such as the amount of reduction and the thickness of the slab is studied.The vertical-flat roll rolling model is established,the influence of the amount of vertical roll rolling reduction on the vertical roll and the subsequent rolling is analyzed.At the same time,the three-dimensional simulation of the whole rolling process with vertical roll rolling is carried out.Edge deformation of aluminum alloy slab during rough rolling process after vertical roll rolling.The results show that the double drum is changed from local deformation to integral deformation,and the influence of stacking is reduced.After the appropriate pass during the hot rolling process to set the vertical roll rolling process,can effectively eliminate the side of the double drum.Which pass the roll rolling,rolling reduction and other factors will have a direct impact on the side effects of the final deformation of the workpiece.In addition,this article also aims at the problem of lack of effective detection method for the head and tail deformation of the slab in the actual process production of the aluminum plate,which leads to the problems that the vertical roll input,the head and tail cutting time and the numerical value can not be precisely controlled.As a result,machine vision of the slab shape detection system,and the detection system software are initial developed.The results show that the detection system software can obtain the information of slab shape and size by analyzing the image of the slab image collected offline.When the slab deformation dimension value exceeds the preset value,it will issue an early warning,rolling process to optimize the guidance.