Tooling and forming process for forming aircraft skin parts of hook type

Abstract

The invention provides a tool and a forming process for forming hook aircraft skin parts. The tool comprises a left bracket and a right bracket, wherein a rolling shaft is arranged on the left bracketand the right bracket; the two ends of the rolling shaft are fixed with the left bracket and the right bracket through a left end cover and a right end cover; and a transverse key and a vertical keyare separately arranged inside the left bracket and the right bracket. The forming process comprises the following steps of: fixing and connecting the left bracket and the right bracket to a mould through the keys, blanking, pre-bending plates, mounting the plates, clamping the plates, regulating a jaw angle of a tong head of stretching equipment, stretching the plates by a left stretching cylinder and a right stretching cylinder of the stretching equipment, cutting side parts of the plates, and the like. The tool and the forming process have the advantages that: integrity of the skin parts can be guaranteed, quantity of cut skin parts is reduced, and integral strength and rigidity of the skin parts are improved. The process of the hook aircraft skin parts further can be simplified, processing difficulty further can be reduced, production efficiency and advanced manufacturing level of plate rib parts in the plastic processing filed are effectively improved, and the production cost is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of forming and manufacturing of sheet metal parts, and in particular relates to a tooling and a forming process for forming hook-type aircraft skin parts. Background technique [0002] Skin stretch forming is a typical sheet forming method in the field of aviation manufacturing. It is mainly used to produce large-scale skin parts that constitute the aerodynamic shape of the aircraft. The process is as follows: first clamp the sheet with clamps located on both sides of the sheet, Then, through the cladding stretching movement of the clamps or the vertical upward lifting movement of the drawing mold, the sheet is gradually attached to the surface of the drawing mold and stretched and deformed to obtain the final shape. The characteristic of the drawing process is to add tangential tension while the plate is bending, so that the stress in the section of the plate tends to be uniform and reduce the bending momen...

AI Technical Summary

Problems solved by technology

Compared with the integrally processed parts, the skin parts made by the aforementioned forming methods have poorer structural integrity, which affects the overall strength and stiffness of the parts; at the same time, additional connecting frames are required, which increases the difficulty of positioning the parts. Reduce production efficiency, consume a lot of assembly time and production costs, and reduce the competitiveness of enterprises

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