Research On Extrusion Deformation Mechanism And Process Parameters Optimizati Of AL6063 Aluminum Material

Aluminum materials are increasingly used in various fields of national defense and national economy because of their excellent performance.As the main processing method of aluminum material,the extrusion processing technology is complicated.At the same time,the quality of the aluminum material is greatly influenced by the value of process parameters.The reasonable value of processing technology and process parameters directly affects the product quality of the aluminum material,and affects the economic efficiency of the enterprise.Therefore,in-depth study of the deformation mechanism and optimization of process parameters for aluminum material extrusion process is of great significance for guiding practical production.Taking compression block as an example,the deformation mechanism and optimization of process parameters were studied in this paper.As a connecting piece between the fixed curtain wall and the glass support,the quality of the block directly affected the safety and reliability of the glass.However,in the forming process of the pressing block,the change of the grain size inside the metal material directly affected the quality of the block.Therefore,by combining the finite element numerical simulation analysis method with the plastic forming theory,in order to refine the grain size of the pressing block,the paper optimized several main process parameters in the process of extrusion forming,thus formulated the best combination of process parameters,and provided reference for the actual production of the factory.Firstly,the three-dimensional solid model of the extrusion structure was established by UG software,and the simulation analysis was carried out by the software of DEFORM-3D plastic forming.The maximum two points of the equivalent strain in the forming process were obtained.Then the microstructure module in DEFORM-3D software was used to observe the change of the grain size at the maximum two points of the equivalent strain at each extrusion stage of the forming process.The effects of process parameters such as extrusion temperature and extrusion speed on grain size changes were analyzed.The results were as follows:with the increase of extrusion temperature,the size of grain became larger,but w hen the deformation and extrusion speed increase,the grain size decreased.Subsequently,the simulation results of grain size at the two points of equivalent strain at final extrusion stage were verified and the results showed that the chemical composition of the aluminum bar?magnesium silicon ratio?also had a great influence on the grain size.Then,according to the simulation results of the change of grain size by the process parameters and the actual production conditions,the main process parameters which affected the grain size change during the forming process were optimized by orthogonal test.Five factors and four level orthogonal test tables L₁₆?4⁵?were designed by selecting the chemical composition of aluminum rods,extrusion temperature,extrusion speed,extrusion barrel temperature and preheating temperature of die.Through the range analysis and variance analysis of the test results,the main and secondary order of the influence of process parameters on the change of grain size was obtained,and the optimal ratio combination was also obtained.Finally,ZEISS Axio Vert.A1 was used to observe the optimized results obtained by orthogonal test showed that the effect of grain refinement was obvious.Further,the tensile strength of the final product was tested by the microcomputer control of electronic universal testing machine?GL028-100KN?,and the results showed that when the grain size of the briquetting was refined,its mechanical properties were also significantly improved,which proved the effectiveness of the research scheme.