Gas bulging forming method of large-sized thin-walled aluminum alloy ball-segment skin

Abstract

The invention discloses a gas bulging forming method of large-sized thin-walled aluminum alloy ball-segment skin. The gas bulging forming method includes the steps: 1) feeding according to the size of the ball-segment skin so as to obtain a sector plate with process allowance; 2) welding the sector plate for the ball-segment skin into a conical barrel; 3) welding a process blind to a small end of the conical barrel, and welding a process flange to a large end of the conical barrel so as to form a ball-segment skin billet; 4) placing the ball-segment skin billet into an inner cavity of a heated gas bulging forming die, closing an upper cover of the gas bulging forming die, and forming a closed cavity between the ball-segment skin billet and the upper cover; 5) feeding compressed gas into the closed cavity until the ball-segment skin billet is attached to the wall of the inner cavity of the gas bulging forming die so that the ball-segment skin is formed; and 6) cutting off the process allowance on the formed ball-segment skin according to the size requirements of the ball-segment skin so that a finished product is obtained. The ball-segment skin prepared by the method only has one welding seam so as to be good in integrality, size precision and surface quality of parts are high, and cost for the die is low.

Description

technical field [0001] The invention belongs to the technical field of precision sheet metal processing, and relates to an inflatable forming method for aluminum alloy large-size thin-walled spherical segment skins, which is suitable for forming various large-sized thin-walled aluminum alloy spherical segment skin parts. Background technique [0002] Due to its excellent performance, aluminum alloys are widely used in aerospace, rail transit, weaponry and other fields. In the field of aerospace, the integration and lightweight of large-scale skin shell parts and components are getting higher and higher, and the requirements for manufacturing precision are getting higher and higher. In the field of aluminum alloy sheet metal forming, cold stamping is mostly used in industry at present. Compared with steel plates, aluminum alloy sheet metal formed at room temperature has the disadvantages of large rebound and low plasticity, so forming large-sized and complex aluminum alloy sh...

AI Technical Summary

Problems solved by technology

[0003] The technical solution of the present invention is to provide an air-inflation forming method for aluminum alloy large-size thin-walled spherical skin, which can overcome the shortcomings of poor integrity of parts processed in the prior art, difficulty in controlling the shape accuracy or high cost, and can effectively ensure large-size Precise Forming of Thin-walled Spherical Segment Skin

Images