Thermal diaphragm preforming method

Abstract

The invention discloses a thermal diaphragm preforming method. The thermal diaphragm preforming method comprises the following steps that a combined detachable tool is used as a common forming tool for paving and preforming a thermal diaphragm, after prepreg is paved and precompacted on the combined preforming tool, an auxiliary paving tool is dismounted, and thermal diaphragm preforming operation is carried out on a reserved preforming body tool, and finally, a desired prepreg sheet laminated preform is obtained. According to the thermal diaphragm preforming method, the problem that at least two sets of tools for paving and preforming are needed in a traditional thermal diaphragm preforming process can be solved, the defect of material piece deformation caused by transfer of uncured prepreg material pieces is eliminated, the repeated positioning process of the prepreg material pieces is avoided, and the thermal diaphragm preforming method has important significance on improving the forming precision, quality and forming efficiency of a thermal diaphragm preformed body.

Description

technical field [0001] The invention relates to a composite material preforming method, more specifically, a thermal diaphragm preforming method which eliminates the uncured prepreg sheet transfer process. Background technique [0002] Composite materials reinforced with panels have been widely used in the aerospace field because of their efficient reinforcement of structures. Most of the ribs of wall panel reinforced composite materials are L-shaped, C-shaped, T-shaped, I-shaped, Ω-shaped, etc. No matter whether the co-curing or co-gluing process is adopted, it is faced with the preparation of a large number of preforms. Traditional manual The molding efficiency and quality stability of paving are increasingly difficult to meet the development requirements. [0003] In recent years, with the development and maturity of composite material automatic molding technology, two automatic molding methods are usually used for the preparation of preforms. One is to directly adopt th...

AI Technical Summary

Problems solved by technology

This method involves the transfer process of uncured prepreg between two sets of tooling, resulting in deformation of the prepreg

In addition, this method needs to complete the secondary positioning of the blank on the thermal diaphragm preforming tooling, but the laminated edges of automatic wire laying or automatic tape laying are often non-aligned, and it is difficult to achieve accurate positioning, resulting in prepreg The positional deviation of the blank and the deviation of the fiber angle affect the molding accuracy and quality

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