Positioning method of flexible tool in forming process of composite product

Abstract

The invention discloses a positioning method of a flexible tool in a forming process of a composite product. The positioning method comprises the following steps: more than two dovetail-shaped positioning grooves are respectively formed in two sides of a flexible tool forming mold; a metal false piece is placed on the surface of the flexible tool forming mold; when the flexible tool is laid and adhered to the surface of the metal false piece, the dovetail-shaped grooves are filled with rubber, the rubber is connected with the flexible tool, the outside of the flexible tool is sealed under vacuum by a vacuum bag, and then the sealed flexible tool enters an autoclave for forming; after a rubber flexible mold is formed, the vacuum bag is removed, the metal false piece is taken out, the shaped flexible tool is filled with composites, then the outer layer of the shaped flexible tool is sealed under vacuum by the vacuum bag, and the flexible tool enters the autoclave for forming to obtain the composite product. By the dovetail-shaped positioning groove structure, positioning between the flexible tool and the forming mold is finished, the flexible tool is fixed and does not deviate in the forming process of the composite product, and therefore, the surface forming quality of the composite product is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of advanced composite material manufacturing, and in particular relates to the manufacturing of high-performance carbon fiber composite structural parts in the industry of aircraft, spacecraft and automobiles. Background technique [0002] Resin-based carbon fiber composite materials have superior properties such as specific strength and specific stiffness, strong designability, good fatigue fracture resistance, corrosion resistance, and good dimensional stability. They are currently widely used in aviation, aerospace, transportation and other fields. High-performance structural materials. Among various carbon fiber composite molding processes, the autoclave process has uniform molding temperature and pressure, and has good adaptability to parts of different materials, shapes, sizes and structures. One of the main process methods of material components. [0003] The U-shaped web is a representative structu...

AI Technical Summary

Problems solved by technology

[0006] Soft tooling generally uses rubber as the main material, and the overall rigidity is poor, and it cannot be mechanically positioned with the forming tooling. Therefore, during the molding process of composite parts, the position of the soft tooling often shifts

If the part to be formed has elements such as thickened areas, once the position of the soft tooling deviates, it will inevitably affect the surface quality and contour of the part after molding, and cause the position deviation of the thickened area. In severe cases, it may lead to scrap

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