Forming method of L-shaped variable cross-section hollow-structure composite material wave-absorbing component with sawteeth

Abstract

The invention relates to a forming method of an L-shaped variable cross-section hollow-structure composite material wave-absorbing component with sawteeth. The forming method comprises the following steps of: S1, according to the appearance size of a product, cutting a honeycomb after leaving a margin, and cutting to obtain a honeycomb blank meeting the processing requirement; S2, preparing a soaked material into a wave-absorbing honeycomb blank; S3, machining the wave-absorbing honeycomb blank to prepare a honeycomb part blank; S4, exposing the part where the sawteeth need to be machined; S5, filling low-dielectric pouring sealant in the part, where the sawteeth need to be machined, of the part blank; S6, adopting a forming tool to lay and cure soaked material skin; and S7, adopting a milling tool for sawtooth machining, and thus obtaining the product through preparation. The forming method has the advantages that the size precision control of a part meets the design requirement, the size stability is good, the appearance quality of the formed part is good, the temperature resistance of the part is improved, and the problems that the part is prone to buckling deformation and surface wrinkles are solved; and the sawtooth parts are filled and reinforced by the pouring sealant, so that the sawteeth are not easy to break.

Description

technical field [0001] The invention relates to a forming method of a composite material wave-absorbing part with serrated L-shaped variable-section hollow structure. Background technique [0002] Radar stealth technology is an indispensable electronic countermeasure technology in modern warfare. There are two main ways to achieve stealth technology: one is to reduce the radar cross-sectional area RCS through shape design, and the other is to apply materials that absorb radar waves. With the development of science and technology, a single method can no longer meet the needs of RCS reduction. The comprehensive application of shape design and radar wave absorbing material can improve the shrinkage of RCS. The use of radar-absorbing materials can improve the stealth performance of components without affecting the structure, strength and aerodynamic shape of components. In order to achieve this approach, the radar wave absorbing material can be attached to intermediate materia...

AI Technical Summary

Problems solved by technology

The disadvantages are: ①Using thermoplastic materials to make wave-absorbing components, the dimensional stability is poor and difficult to control; ②The overall structural strength of the product is weak, especially the sawtooth parts are easy to break; ③Small burrs are easily produced on the sawtooth parts , it is difficult to clean; ④ After plastic foam molding, it is inevitable that there will be holes inside the foam. After the product is made, the holes are exposed and the appearance is not beautiful; ⑤ The temperature resistance of the product is unstable, and it is easy to warp and deform and surface wrinkles; Product resistance power does not meet the demand

Images