Investigation On Drawing Of 5A06 Alluminum Alloy Frame-shaped Part

In recent years, with the rapid development of the aerospace industry, the demand for the thin- walled aluminum parts with complex shape is increasing. Especially, the application of frame-shaped parts is very extensive, which are used for connection or fuselage structure strengthening. Due to it’s poor plasticity and formability of aluminum alloy, it is difficult for aluminum alloy to form with conventional deep drawing. Setting pre- manufactured hole on the blank can help to release the deformation stress near the hole. Forming limit of these parts can be effectively improved with a compound deformation mode of drawing- flanging.In this paper, based on the forming of frame-shaped parts in the field of aerospace, the forming process of 5A06 aluminum alloy frame-shaped parts was studied by means of simulation and experiment. The influence of different para meters on the forming process was analyzed, and the limited drawing depth of frame pa rts with different parameters was obtained.The forming process of frame-shaped parts was simulated by finite element simulation software Dynaform5.9. The effects of the blank shape and size, the radius of cone corner, cone angle, and chamber pressure on the thickness distribution were studied, and the reasonable shape and size of the blank was Determined. The strain distribution law of frame-shaped parts with different parameters was analyzed. The causes of defects were studied and the controlling methods were discussed.In order to verify the practicability of the forming method and effects of the blank shape and size, tool structure parameters and chamber pressure, experiments on the forming process of the frame-shaped parts were carried out. The effects of the blank size, the radius of cone corner, cone angle, chamber pressure and forming pass on the thickness distribution were analyzed. It was found that experimental results agree with experimental results.Finally, the cracking position and the direction of the cracks were summarized, and the limited drawing depth of frame-shaped parts with different parameters were obtained. The forming limit of the frame-shaped parts could be effectively improved by designing reasonable pre- manufactured hole, increasing the radius of cone corner, reducing the cone angle, and multi pass forming.