Method for sewing and integrally forming metal member and composite material

Abstract

The invention relates to a method for sewing and integrally forming a metal member and a composite material. The method comprises the following steps that sewing holes for sewing are machined in a sewing area of the metal member, the total area S0 of the sewing holes is equal to k0S, S is the area of the sewing area of the metal member, and k0 is larger than or equal to 0.01 and smaller than or equal to 0.1; the hole side distance d1 of the sewing holes is equal to k1d, and the hole spacing distance d2 of the sewing holes is equal to k2d; d is the diameter of the sewing holes, k1 is larger than or equal to 1 and smaller than or equal to 12, and k2 is larger than or equal to 1.5 and smaller than or equal to 15; a glue film is attached to the sewing area of the metal member, dry fabric is laid on the upper surface and / or the lower surface of the metal member, then the dry fabric is shaped, and finally the shaped dry fabric is compacted; sewing is carried out, and a preformed body is obtained; and the liquid forming technology is adopted, and a composite material product with the metal member is manufactured. According to the method, secondary machining and riveting working proceduresare not needed, the forming working procedure is simplified, the cost is reduced, and the product quality is improved.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a method for sewing and integrally forming metal components and composite materials. Background technique [0002] Resin-based composite materials are widely used in the aerospace field for main load-bearing parts such as wings and wing structures due to their high specific stiffness, specific strength, and corrosion resistance. At present, the forming of composite material structure basically adopts the method of integral forming and split forming machine. The advantages of integral molding of composite materials are that each structural component can transmit load evenly, reduce the number of parts, and reduce assembly costs. However, the more complex the composite material component is, the more difficult it is to design and manufacture the mold. Composite materials that are formed in separate parts are connected into a whole by gluing, screwing or riveting, whic...

AI Technical Summary

Problems solved by technology

However, the more complex the composite material component, the more difficult it is to design and manufacture the mold

Composite materials that are formed in separate parts are connected into a whole by gluing, screwing or riveting, which can reduce the difficulty of forming, but the connection methods such as riveting and screwing will cause damage to the composite material structure, and the performance of the structural parts is lower than that of the composite material. Integral molded composite structure

[0003] In the preparation process of composite products, most of them need to involve the connection of composite materials and metals. The traditional process method adopts rivet assembly for connection. The use of a large number of rivets not only increases the weight and process cost of the product, but also leads to composite materials. The fiber continuity of the material is destroyed, resulting in many problems such as damage around the assembly hole or the need for reinforcement, which directly affects the bearing capacity of the airfoil

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