Study Of The Process Of The Hydro-Mechanical Deep Drawing Of Axisymmetric Part By Simulation With 6022 Aluminum Alloy

Because aluminum alloy is an important material with high ratio strength and has the advantages of light weight, corrosion resistant performance, it has been widely used in the manufacturing industry of the light weight structures and parts. Aluminum alloy sheets have found application in the industry of automobile. However, aluminum alloy sheet has poor plasticity and is also anisotropic. Therefore using the traditional stamping method usually causes rupture failure.On the other hand, hydro-mechanical deep drawing has the advantages of high forming limits, good surface quality and high dimension precision. The technique of hydro-mechanical deep drawing is an effective way for the forming of aluminum alloy sheets with low plasticity. Therefore it is necessary to research on the process of hydro-mechanical deep drawing of aluminum alloy sheet to obtain optimum process parameters.This study will take 6022 aluminum alloy sheets as the research object. Firstly, obtain its mechanical properties parameters and forming limit diagram and evaluate its forming performance through tensile test and bulging test. Then obtain optimum process parameters through the simulation analysis of the hydro-mechanical deep drawing of spherical part and conical part by using the finite element analysis software ABAQUS-Explicit.This study investigated the effect of pre-bulging pressure on deformed shape and thickness, the effect of pre-bulging height on deformed shape and thickness, the effect of pressure of liquid room on deformed thickness, the effect of the clearance between the blank holder and die on deformed thickness during the process of hydro-mechanical deep drawing for spherical part and conical part respectively. The following conclusions are obtained. Appropriate pre-bulging pressure and height can improve the quality of the final deformed parts, for the process of hydro-mechanical deep drawing for spherical part and conical part, the appropriate pre-bulging pressure are 0.5MPa and IMPa respectively; Appropriate clearance between the blank holder and die and loading curve of pressure of liquid room can improve the thickness distribution of the final deformed parts, the appropriate clearance between the blank holder and die are 1.1 times the thickness of the plate,the best appropriate pressure of liquid room for the process of hydro-mechanical deep drawing for spherical part and conical part are 7.5MPa and 8MPa respectively; Appropriately increase the friction between punch and reduce the friction between die can improve the quality of the deformed parts, the best appropriate friction between punch and the friction between die are 0.3 and 0.02 respectively. Finally, the optimum process parameters were obtained.