Forming method for improving ablation and controlling deformation of special-shaped structure product

Abstract

The invention discloses a forming method for improving ablation and controlling deformation of a special-shaped structure product. The forming method comprises the following steps that by using a prepreg formed by dipping 2.5D woven fabric in flexible phenolic resin as a thermal protection layer, laying of a heat-proof layer is completed layer by layer, a silicon rubber layer is added between a special-shaped structure metal shell and the heat-proof layer, finally pressurizing, curing and forming are conducted, and a special-shaped structure product coated with the heat-proof layer is obtained. According to the forming method for improving the ablation and the controlling deformation of the special-shaped structure product, the linear expansion coefficient difference between an internal metal material and an external surface composite material of the special-shaped structure product is reduced, the bonding quality is improved, surface composite material loss is avoided, the heat-proof performance of the special-shaped product can be kept, the normal working time of an aircraft is prolonged, and the maintenance cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of composite materials, in particular to a forming method for improving ablation and controlling deformation of special-shaped structure products. Background technique [0002] Aircraft refers to all machines or man-made objects capable of flying. Aircraft are divided into aircraft and spacecraft according to different flight environments. Aircraft flying in the atmosphere of the earth or other planets are called aviation aircraft, aircraft for short, such as airplanes, helicopters, etc. , they rely on the static buoyancy of the air or the aerodynamic force generated by the relative motion of the air; the aircraft that fly in space are called aerospace vehicles, or spacecraft for short, such as artificial earth satellites, manned spacecraft, space probes, aerospace vehicles, etc. Airplanes, etc., are propelled by the launch vehicle to obtain the necessary speed to enter space, and then rely on inertia to do ...

AI Technical Summary

Problems solved by technology

For heterogeneous structure products, there are many defects disclosed in the prior art, including the difficulty of net size molding, and the influence of the large difference in linear expansion coefficient between the internal metal material and the outer surface composite material of heterogeneous structure products. There are irregular deformations, which affect the bonding quality, and the larger the product size, the more serious the impact on the bonding quality of the product, resulting in unreliable bonding of special-shaped products during the assembly process, or the lack of composite materials on the outer surface, resulting in product failure. Poor heat resistance, affecting the normal operation of the aircraft and even causing damage

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