Large wind tunnel contraction section manufacturing method

Abstract

The invention discloses a large wind tunnel contraction section manufacturing method. The method comprises the steps that a reverse molded surface mould is designed and manufactured according to the size of a wind tunnel contraction section; scribing is carried out on the installation positions of contraction section shell body frames on the molded surface mould; rechecking is carried out on the assembly positions after scribing; then assembling and welding are carried out on the contraction section frames on the mould; after welding is completed, checking is carried out on the size of the frame; overturning is carried out after the size is checked to be qualified, so that the inner molded surface is upward, and skin assembly is carried out; and finally, integrally assembling is carried out, and the upper frame, the lower frame, the left frame and the right frame are welded together. The manufacturing method can effectively guarantee the molded surface size of the large wind tunnel contraction section, has the advantages of being easy and convenient to operate, capable of saving the construction period, wide in application range and the like, and has important reference and application value for manufacturing other large-size and poor-rigidity curved surface steel structure equipment.

Description

technical field [0001] The invention belongs to the field of equipment manufacturing, in particular a method for manufacturing a contraction section of a large wind tunnel in the field of wind tunnel manufacturing. Background technique [0002] The wind tunnel is a multi-disciplinary fusion simulation ground test equipment established for the key aerodynamic and related problems that must be solved in the development of large-scale advanced aircraft. The contraction section is located between the stable section and the test section. The uniformity of the flow in the test section reduces the turbulence of the air flow in the test section. [0003] The shrinkage section of the wind tunnel is one of the key sections in the steel structure wind tunnel. The more difficult the shape tolerance and dimensional tolerance are. In the past wind tunnel construction, due to the small size of the wind tunnel, the mold was designed, and the skin was directly laid on the mold for shaping,...

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Problems solved by technology

[0005] The first purpose of the present invention is to propose a method for manufacturing the shrinkage section of a large-scale wind tunnel on the basis of the prior art, so as to solve the problem of self-deformation caused by too large skin

[0006] The second purpose of the present invention is to solve the problem that a large amount of deformation occurs in the skin during the welding process of the first purpose

[0007] The third purpose of the present invention is to solve the problem of how to ensure the installation accuracy in the assembly process

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