Study On The Thermal Stress Analysis And Orthopedic Technology Of Aluminum Alloy Thin-walled Die Castings

In the present age,the science technology and industry are developing rapid ly,especially in aviation,aerospace,rail transportation,automotive and so on.These areas are the most widely used aluminum alloy parts,aluminum alloy parts has some advantages,such as light weight,high strength and good corrosion resistance,and,Many of them are thin-walled aluminum alloy castings.In these fie lds,it needs high precision requirements on the wall thickness,size,strength and so on,but in the actual industrial production,Aluminum Alloy thin-walled castings due to internal therma l stress and influence of some outside factors,occurs deformation frequently and result ing in a substant ial reduction in yield,Therefore,it is crucial to the analysis of thin-walled castings deformation mechanism and correction technique.Based on thin-walled castings Aluminum Alloy D2 UB shift bracket as the research object,establish the correction process model,and to support the deformation mechanis m was analyzed,what is more,using the finite element software ABAQ US studies thermal-stress analysis during high temperature heat cooling mode.It studies the influence of temperature change rate on the deformation of thin wall support and simulates that the bracket can be cooled under the two condit ions of the furnace and the room temperature,the results show that the stress variation of the bracket at each moment of the holding furnace is obvious ly less than that of the room temperature environment,and the amount of deformation of the deformation posit ion of the bracket is lower than that of the support under the room temperature condit ion.But C ompared with the ambient temperature,the disadvantage of each bracket in the environment cooling of the heat preservation furnace is that it takes a long time and it do esn't suit for the production of fast-paced industry.In order to more rapid and efficient correction,the research group designs a set of detection and correction of the automation test platform.And paper introduce the structure and princ iple of the design of the platform,and according to the establishment of orthopedic devices,the establishment of orthopedic simp le mathematical models,studying the change of stress and strain under elastic-plastic stage by theoretical analys is.Through the orthopedic device,a large number of orthopedic experiments were performed and obtains the change rule of the displacement of the push rod and the residual shape variable of the support leg and the change rule of gasket thickness and the residual shape of support plate,through the theoretical calculation and the experiment,obtaining the practical and reliable parameters related to the bracket,which can be used as a reference for the research of thin-walled castings.