Molding tool and molding method for zero-degree fiber bundles for R-angle reinforcement of composite material

Abstract

The invention provides a molding tool and a molding method for zero-degree fiber bundles for R-angle reinforcement of a composite material. The tool is composed of a molding die, a membrane removing sheet, a fixing block and a hand rocking arm, wherein a molded surface of the molding die and a bulged molded surface on the fixing block are combined so as to form a die cavity for to-be-compressed zero-degree fiber bundles. In molding, the molding die and the fixing block which are matched with an R-angle filling zone are selected according to the size of the R-angle filling zone; the amount of zero-degree fiber bundles is calculated according to the area of the R-angle filling zone; prepreg of the zero-degree fiber bundles is rolled to be cylindrical and is put into the die cavity which is formed by the combination of the molded surface of the molding die and the bulged molded surface on the fixing block; the molding die is driven to rotate by the hand rocking arm, the zero-degree fiber bundles are compressed to be of required shapes, and finally the compressed zero-degree fiber bundles are taken out from the die cavity by utilizing the membrane removing sheet. Because the precision of the die cavity formed by the molding die and the fixing block is provided by numerical control process, the size quality required for the R-angle zero-degree fiber bundles can be ensured.

Description

technical field [0001] The invention relates to a zero-degree fiber bundle forming tool for R-angle reinforcement of composite materials and a forming method thereof, belonging to the technical field of composite material manufacturing. Background technique [0002] Composite parts such as trusses, beams and ribs are common structural parts in aircraft load-bearing components. In these structural parts, there are a large number of filling areas of R-angle zero-degree fiber bundles. How to control the filling quality of the R-angle filling area is of great significance to the molding quality of composite parts. Therefore, in order to ensure the molding quality of the parts, it is necessary to adopt the necessary molding methods for the R-angle zero-degree fiber bundles. [0003] Existing zero-degree fiber bundle forming methods for R-angle reinforcement of composite materials include manual rolling forming and vacuum pressing forming. In the manual roll forming method, the ...

AI Technical Summary

Problems solved by technology

In addition, the vacuum forming method requires the preparation of relatively large vacuum forming tooling, resulting in a large footprint

Therefore, although the vacuum compression molding method can guarantee the molding quality, its application in industrial production is limited due to its narrow application range, high production cost, and large floor space.

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