Suitable for satellite antenna reflector composite material radial curved surface rib forming mold

Abstract

The present invention provides a molding die suitable for composite radial curved surface ribs of satellite antenna reflectors. The design idea of ​​the overall die is as follows: using a composite material prefabricated plate with several positioning boss structures, and positioning it on the surface of the bottom plate and the prefabricated plate On several card slots on the positioning plate, lay layers on both sides of the prefabricated slab, and position the pressurized soft mold components on both sides by designing annular steps with increasing height on the bottom plate, and the pressurized soft mold components on both sides are composed of steel molds The core is composed of silicone rubber wrapped outside it or is composed of silicone rubber strips and their limit steel plates. The invention develops a composite material prefabricated plate with a bottom plate and a pre-set positioning plate to open slots for positioning and laying layers on both sides. Both sides are designed with soft mold pressurization.

Description

technical field [0001] The invention relates to mold design, in particular to a molding mold suitable for forming radial curved surface ribs of composite materials for satellite antenna reflectors. In particular, it relates to a design method suitable for forming molds for hexagonal radial curved surface ribs of composite materials for satellite antenna reflectors. Background technique [0002] Due to the use requirements of the satellite reflector, the size of the components is large. In order to ensure sufficient strength, rigidity and high precision requirements, the general components adopt the structure of the skin glued to the back of the large-scale overall reinforcing rib, that is, the back rib described in the present invention. The overall rigidity of the components, and in order to take into account the requirements of lightweight, most of the reinforced back ribs are made of composite material components with high specific strength and specific stiffness. [000...

AI Technical Summary

Problems solved by technology

[0003] At present, due to the problems that the steel molds on both sides cannot be pressurized in place and the soft molds on both sides have no lay-up reference for composite components with large-sized ribs, the molding method of one steel mold and one side vacuum bag or soft mold pressurization is mostly used. However, for large-scale and complex radial ribs, after using this method, the steel formwork is fixed on the bottom plate between two radial angles as the laying reference, and the adjacent angle area must be realized with a full soft mold structure. The overall pressurization, and so on, three of the six radial angle areas are the all-steel mold laying reference, the three areas are all soft mold pressurization, and the two methods appear at intervals, which will cause two types of product outer contours. The problem with apparent state

On the other hand, the curved surface of the back reinforcement has a large curvature, and the height difference between the highest point and the lowest point is nearly 100mm. If the method of designing the flat bottom plate with the height of the lowest point as the reference plane is adopted, the height of the steel mold in the pressurized soft mold assembly will also be close to 100mm. Generally, the length of commonly used standard screws and pins cannot meet the positioning and fastening of steel moulds. Using large-diameter screws and pins will increase the thickness of the corresponding steel mould, and the overall weight of the mould, and the weight of a single part are both overweight, resulting in difficult operation.

Images