Study On Stress And Deformation Control Of 5B06 Aluminum Alloy Arc Additive Manufacturing Components

5B06 aluminum alloy takes an important position in the aerospace industry,it has a moderate strength,good plasticity,low density,strong corrosion resistance,and its crack resistance is good,using this material to replace steel can greatly reduce the quality of components,can also achieve the purpose of energy conservation and environmental protection.In recent years,with the extensive application of composite materials and titanium alloy materials in the aerospace field,the aerospace aluminum alloy materials must be optimized to reduce the density,improve the material strength and comprehensive performance,and reduce the cost.Produced in the process of welding residual stress and caused by the welding deformation of material forming quality is an important test,in order to overcome this problem,this article through arc increasing material manufacturing aluminum alloy CMT multilayer thin walled components,and,by means of finite element simulation analysis on the stress field in aluminum alloy arc added material manufacturing and welding deformation observation and study of the main results were as follows:(1)The experiment of additive manufacturing of 5B06 aluminum alloy welding wire was designed,and the parameters were selected by summarizing the results of preliminary exploration experiment,and the components with good forming effect were obtained.(2)The CMT additive manufacturing process of 5B06 aluminum alloy wire is simulated by finite element method,and its temperature field and stress field are analyzed and discussed.(3)When studying the temperature field,it is found that the temperature of each cladding layer is the highest in the first cladding,and the peak temperature of each cladding layer decreases gradually as the number of cladding layers increases.The lowest cooling temperature of cladding layer shows an increasing trend until it tends to be stable.This is due to the heat dissipation effect of the substrate.The cladding layer in the lower layer is closer to the substrate,while most of the substrate is at room temperature and has a large heat dissipation area,so the cooling is faster.And with the increase of cladding layer,a heat source heating effect,the substrate temperature gradually raised,and the heat source and the cladding layer substrate is becoming more and more far distance,heat passed on by the component layers increase,and the heat transfer area is reduced,resulting in a decline in the cooling effect of the substrate,easy to form the heat accumulation,also more and more high,the lowest temperature cooling until the base surface heat dissipation reduced to almost negligible,the influence of minimum temperature has leveled off.(4)By comparing and analyzing the simulated residual stress with the measured residual stress,it is found that the two answers are in agreement with each other,which indicates that the simulated results have high credibility and correctness,which is of great significance to the research of stress and deformation control.(5)By means of finite element simulation and prediction,the arc additive manufacturing process of 9 groups of different process parameters was calculated,and the results were collected and plotted as a graph for analysis and discussion.The laws of residual stress and deformation after welding affected by process parameters are studied.It is concluded that the residual stress and deformation can be controlled to some extent by adjusting welding heat input.