Spinning forming method for large-diameter ratio thin-walled aluminum alloy special-shaped member

Abstract

The invention relates to a spinning forming method for a shell of a large-diameter ratio thin-walled aluminum alloy special-shaped member for aerospace, and belongs to the technical field of storage tank forming. A circular plate blank is adopted, precise numerical control spinning forming of the shell of the large-diameter ratio thin-walled aluminum alloy special-shaped member is directly carriedout, and auxiliary processes such as pre-forming and intermediate heat treatment are not required; and through process design and precise control, a spinning path is adopted, specifically, firstly, 11-times (hot strong spinning-hot normal spinning) forming is alternately performed in a circulating mode, and then finishing is carried out through one-time hot strong spinning. Only one set of spinning dies is needed, one-time loading clamping is needed, precise spinning forming of the shell of the large-diameter ratio thin-walled aluminum alloy special-shaped member can be achieved in one numerical control program, the process flow is shortened, the production efficiency is improved, the forming precision of the member can be greatly improved, the unilateral clearance between the inner profile of the shell of the formed special-shaped member and the theoretical profile template is less than 0.1mm, and the wall thickness difference is less than 0.2mm.

Description

technical field [0001] The invention relates to a spinning forming method of a thin-walled aluminum alloy special-shaped component with a large length-to-diameter ratio for aerospace, and belongs to the technical field of tank forming. The "large aspect ratio" in the thin-walled aluminum alloy special-shaped component with a large aspect ratio refers to the ratio of the total height of the component blank to its maximum diameter not less than 1.8; the "special-shaped component" refers to the profile of the component The number of profile categories is not less than 2. For example, the profile of a component includes a circular arc profile and a straight tube profile. Thin-walled means that the wall thickness of a component is not greater than 2mm. Background technique [0002] For thin-walled aluminum alloy special-shaped components with a large aspect ratio ≥ 1.5 and a wall thickness ≤ 2 mm, the following two methods are generally used for forming: Option 1 is to use multip...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, and to provide a method for directly spinning the shell blank of a thin-walled aluminum alloy special-shaped member with a large length-to-diameter ratio from a plate, which can overcome the deficiencies of the prior art. More processes, increased cost and decreased accuracy

Images