Technological cover plate of combined structure and preparation method

Abstract

The invention discloses a technological cover plate of a combined structure. The technological cover plate comprises a plurality of split shaped panels in lap joint, and the split shaped panels comprise border parts provided with step surfaces and connecting parts connected with the ends, away from the step surfaces, of the border parts; the border parts and the connecting parts are molded throughone-time curing; and the split shaped panels are in lap joint through the step surfaces. According to the technological cover plate, the border parts with the step surfaces are adopted, motion coordination of internal structures of the technological cover plate is improved, the fitting degree of the technological cover plate and skin green bodies is optimized, and internal quality is guaranteed;lap joint clearances are prevented from being generated, the possibility of the material overflow problem is reduced, even though the material overflow problem occurs, only resin overflows, and overflowed materials can be treated through simple polishing; and the operation program is effectively simplified, the separated lap joint effect of the split shaped panels is improved, the possibility of material overflow at lap joint zones of the split panels is reduced, the structure is unique, the concept is novel, and the prepared technological cover plate of the combined structure has high structure motion coordination of rubber technological cover plates.

Description

technical field [0001] The invention relates to the technical field of composite material manufacturing, in particular to a composite structure process cover plate and a preparation method thereof. Background technique [0002] The process cover is a commonly used auxiliary forming tool for manufacturing composite skin structures. Among them, the process cover of composite material is based on its own stiffness and high-quality forming surface, and is currently widely used in the field of aerospace and other high-end composite structure manufacturing. application. [0003] However, the high rigidity performance of the composite material process cover plate leads to poor coordination of activities and easily causes position mismatch, especially the high-quality external surface, which uses a male mold to form a special-shaped skin. The special-shaped skin is rich in R-zones, knuckles, and breakpoints, and it is extremely difficult to prepare. If the traditional composite mat...

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Problems solved by technology

[0003] However, the high rigidity performance of the composite material process cover plate leads to poor coordination of activities and easily causes position mismatch, especially the high quality requirements of the outer surface, and the special-shaped skin formed by male mold

The special-shaped skin is rich in R-zones, knuckles, and breakpoints, and it is extremely difficult to prepare. If the traditional composite material technology cover plate is used, although the high-quality surface of the special-shaped skin is given, due to its high rigidity, the coordination of internal structure activities is poor. It is easy to cause position mismatch with the skin body, resulting in structural mutation areas such as R areas, knuckles, and breakpoints, forming internal defects such as knuckle protrusions, resin-rich, and delaminated, which obviously cannot meet the requirements for the manufacture of such composite special-shaped skins. need

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