Compression method for t-shaped and/or i-shaped stringers of composite material reinforced panels

Abstract

The invention relates to a method for pressurizing T-shaped and / or I-shaped long trusses of composite material reinforced wall plates, belonging to the technical field of composite material long truss forming. Transfer the girder preform to the curing tooling, position the two sides of the girder preform with positioning piece 1, and position one end of the girder preform in the length direction with positioning piece 2, and the shape of the girder preform is T-shaped and / or or I-type; place a separator on the surface of the stringer preform, place an L-shaped soft film on both sides of the T-shaped stringer preform, and place the T-shaped stringer preform together with the L-shaped soft film in a vacuum bag , and then place L-shaped auxiliary profiles on both sides of the L-shaped soft film to form a T-shaped stringer preform assembly, and finally clamp the T-shaped stringer preform assembly with a spring clip and place it in an autoclave for curing; the I-shaped stringer The pressurization method of the preform is the same as that of the T-shaped truss preform, except that the L-shaped soft film is replaced by a C-shaped soft mold, and the L-shaped auxiliary profile is replaced by a square auxiliary profile. The invention is used to pressurize T-shaped and / or I-shaped long trusses of composite material reinforced wall panels.

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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