A method for forming composite I-beams

Abstract

The invention relates to a method for forming a composite material I-beam, which is characterized in that it includes the following steps: Step 1: first, respectively complete the left and right C-shaped parts of the I-beam on the upper mold body of the forming mold, the lower mold body of the forming mold, and the pressing plate. Layup and compaction of the upper and lower cover plates; Step 2: After the layup and compaction of the prepreg blanks of each part of the I-beam are completed, the blanks are not removed from the mold body, and the mold body is directly placed on the mold body , the lower mold body of the forming mold, and the pressure plate are assembled together through the positioning support structure and movable pins. Step 3: Complete the vacuum bag packaging of the assembly obtained in Step 2 in the tooling vacuum bag packaging area; Step 4: Transfer the packaged system to solidify in the autoclave; a mold for forming a composite I-beam includes a forming die upper die body and a forming die lower die body, and the forming die upper die body and the forming die lower die body are in an H-shaped vertical opposition In combination, a positioning support structure is set between the upper mold body of the forming mold and the lower mold body of the forming mold.

Description

technical field [0001] The invention relates to an H-shaped molding die of a composite material I-shaped structural beam part and a manufacturing technical scheme, in particular to a composite material I-shaped structural beam molding die with a relatively large thickness and a technical manufacturing method. Background technique [0002] The I-shaped structural beam is a beam-rib form commonly used in aircraft composite structures. It is widely used as the main structural form in laminated plate beams. It is mostly used for girders and ribs in wing surface structures, longitudinal beam. The structural beam is composed of left and right C-shaped pieces, upper and lower cover plates and core materials. [0003] The original "I"-shaped structural beam forming tooling is a modular structure, which is mostly composed of the lower formwork, left and right mandrels. When forming, first complete the laying of C-shaped parts on the left and right mandrels, and then The upper and l...

AI Technical Summary

Problems solved by technology

[0004] The curing process in the above-mentioned prior art is a thermal reaction process. In the early stage of heating, the resin in the layup is softened by heat, and the left and right mandrels lose the support of the bottom layup. Due to gravity and external pressure, they are prone to roll, which in turn causes The local pressure in the web and edge area is insufficient. Therefore, after solidification and molding, the thickness of the web and edge of the I-shaped structural beam is often uneven, and the appearance quality is difficult to meet the requirements, and it is easy to have quality problems in non-destructive testing, especially When the thickness of the parts is large, it is easy to cause the shortage of scrapped parts. The invention provides a mold and method for forming I-beams made of composite materials.

Images