A thermal diaphragm preforming method suitable for z-type structural composite materials

Abstract

The present invention provides a method for preforming a thermal diaphragm suitable for Z-shaped structural composite materials. First, the primary forming is completed by a primary preforming tool, and then the secondary forming is completed by inverting the first main tool and connecting it with the secondary preforming tool. , to obtain a preform. By means of the primary pre-forming tool and the secondary pre-forming tool, the present invention makes the laying of the prepreg no longer limited by the size of the tape laying head or the wire laying head, realizes the stable laying of the prepreg, and can realize the uncured material. The controllable transfer of the prepreg laminate blanks avoids the risk of instability of the prepreg profile caused by the tooling change of the two thermal diaphragm preforms, and ensures the accurate forming of the Z-shaped structure.

Description

technical field [0001] The invention relates to the processing field of composite materials, in particular to a thermal diaphragm preforming method suitable for Z-shaped structural composite materials. Background technique [0002] The special application environment of aerospace determines its continuous pursuit of lightweight structural materials. Resin matrix composites have become the preferred material option in aerospace structures due to their outstanding specific strength and specific modulus advantages. In addition to its own light weight and high strength, composite materials can further develop the mechanical properties of high-performance fibers by designing different reinforcement forms, such as the use of different forms of long trusses to enhance the skin structure. Among them, the Z-shaped truss is a typical form of truss. In the composite material structure, the Z-shaped structure can be used as a reinforcement after curing and bonding for the reinforcemen...

AI Technical Summary

Problems solved by technology

[0003] Traditionally, Z-shaped trusses are preformed by manual laying. Due to the concave and convex shape of the laying process, the laying efficiency and quality stability are relatively low, which is difficult to meet the further expansion and application of composite material structures.

However, due to the special structural form of the Z-shaped structure, the automatic forming methods that have been widely used at present, including the automatic tape laying process and the automatic silk laying process, are limited by the size of the tape laying head and the silk laying head, and it is difficult to achieve 90% of the structure. ° and 45° plies for stable placement

For the Z-shaped structure, if the traditional thermal diaphragm preforming method is used, it is difficult to achieve effective and accurate positioning and fixing measures between the blank and the tooling, and cannot meet the precise forming quality assurance

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