Pressurizing method for T-shaped and/or I-shaped stringer of composite reinforced wallboard

Abstract

The invention discloses a pressurizing method for a T-shaped and / or an I-shaped stringer of a composite reinforced wallboard, and belongs to the technical field of composite stringer forming. The method comprises the following steps: transferring a stringer preformed body to a curing tool, positioning two sides of the stringer preformed body through positioning pieces I, and positioning one end, in the length direction, of the stringer preformed body through a positioning piece II, wherein the stringer preformed body is in a T shape and / or an I shape; and placing an isolation film on the surface of the stringer preformed body, placing L-shaped soft films on two sides of the T-shaped stringer preformed body, placing the T-shaped stringer preformed body and the L-shaped soft films in a vacuum bag together, then placing L-shaped auxiliary sectional materials on two sides of the L-shaped soft films to form a T-shaped stringer preformed body assembly, and finally, clamping the T-shaped stringer preformed body assembly through a spring clamp and placing the T-shaped stringer preformed body assembly in an autoclave for curing. The pressurizing mode of the I-shaped stringer preformed bodyis the same as that of the T-shaped stringer preformed body, only the L-shaped soft films are replaced with C-shaped soft films, and the L-shaped auxiliary sectional materials are replaced with squareauxiliary sectional materials. The method is used for pressurizing the T-shaped and / or I-shaped stringer of the composite reinforced wallboard.

Description

technical field [0001] The invention belongs to the technical field of forming composite material long trusses, and in particular relates to a method for pressing T-shaped and / or I-shaped long trusses of composite material reinforced wall panels. Background technique [0002] The superior performance of composite materials makes it more and more widely used in the aviation field. More and more "T-shaped" and "I-shaped" long stringers of large-size, super-large-size and high-precision composite material reinforced panel parts are Choose between co-curing and co-adhesive molding. Since the pressurization of the long girder web and girder bars during the curing process of the composite material directly affects the intrinsic quality of the entire composite material product, it is one of the important factors to weigh whether the entire composite material part is qualified, and how It is particularly important to solve the compression problem of composite material reinforced pa...

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Problems solved by technology

[0003] 1. Most metal materials are used as curing molds. However, metal molds have stress deformation and plastic deformation. During the curing process of composite parts in the autoclave, if the pressure in the autoclave cannot eliminate the deformation of the metal mold, it will cause long-term Uneven pressure transmission occurs in the girder web and beams, resulting in defects such as glue splicing, delamination, and out-of-tolerance porosity in the long girder web, beams, and R-angle areas, resulting in the scrapping of composite parts

[0004] 2. A small number of fabric prepreg + Airpad rubber soft film form, the biggest disadvantage is that fabric prepreg and Airpad rubber have a long procurement cycle, high cost, low utilization rate, and high tooling costs

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