Large-thickness honeycomb sandwich structure reinforcing area forming process method

Abstract

The invention belongs to the technical field of aviation composite material manufacturing, and discloses a large-thickness honeycomb sandwich structure reinforcing area forming process method which comprises the following steps: aiming at a honeycomb piece with a reinforcing area, paving a gasket layer at a position, corresponding to the reinforcing area, on the molded surface of a mold, and then placing a large-thickness honeycomb on the mold on which the gasket layer is paved, shaping the reinforcing area of the large-thickness honeycomb, and stabilizing the large-thickness honeycomb after shaping; and taking down the large-thickness honeycomb and the gasket layer, laying a reinforcing layer on the mold, and finally the placing stabilized large-thickness honeycomb on the mold for structural forming. According to the method, the problem that in the preparation process of the large-thickness honeycomb sandwich structure, a machining procedure needs to be carried out on a pneumatic face honeycomb reinforcing area is solved, the preparation process level of the large-thickness honeycomb sandwich structure is improved, and the method has a high practical application value; according to the invention, the honeycomb is shaped and stabilized only after the molded surface is compensated by the reinforcing layer, so that the manufacturing process and flow of workpieces are reduced, and meanwhile, the resources of processing equipment are also saved.

Description

technical field [0001] The invention belongs to the technical field of aviation composite material manufacturing, and relates to a fixing process method of a honeycomb sandwich structure, in particular to a forming process method of a reinforced area of ​​a large-thickness honeycomb sandwich structure. Background technique [0002] During the design process of the aircraft wing-body fairing, the wing-body fairing needs to be connected with the fuselage by connecting pieces. In the fairing design process, it is necessary to set a reinforced area in the honeycomb sandwich structure, and the sandwich structure core layer of the reinforced area is generally a foam sandwich structure, and lay multi-layer prepreg for local strength strengthening. [0003] For the shape surface (aerodynamic surface) of the part, if the reinforced area protrudes from the shape of the part, it will affect the aerodynamic shape of the part. Therefore, honeycomb processing is required to keep the shape...

AI Technical Summary

Problems solved by technology

[0005] There are two methods in the past: one method is to add honeycomb to the reinforced area of ​​the part. In this machining process, the honeycomb needs to be fixed on the machining surface and positioned, and then the profile of the honeycomb is manufactured. This method extends the length of the part. Manufacturing process, at the same time, due to the poor rigidity of the honeycomb in this process stage, it is difficult to operate the positioning and shaping of the honeycomb

Another method is to additionally design and manufacture a mold that meets the requirements of the honeycomb, but this method consumes a lot of cost, and this method is generally not used

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