A method of manufacturing an antenna rib

A manufacturing method and technology of ribs, applied in the field of composite material preparation, can solve the problems of long cycle, high cost, low product qualification rate, etc.

Active Publication Date: 2016-07-06
XIAN TUOFEI COMPOSITE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the ribs of the satellite antenna are generally prepared by autoclave forming, but this method has long cycle time, high energy consumption and high cost, and the inner film is used in the autoclave, so the appearance and precision of the product cannot meet the design requirements. The accuracy ranges from 1 to 3mm, and the qualified rate of the product is low

Method used

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  • A method of manufacturing an antenna rib
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  • A method of manufacturing an antenna rib

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0044] A method of manufacturing an antenna rib, comprising the following steps:

[0045] (1), the mold of prefabricated antenna rib is polished, and mold comprises upper die and lower die 3;

[0046] (2), adopt raw silica gel and pine wood to prepare mandrel and remove the burr on the mandrel;

[0047] The mandrel is mainly used for preforming (equivalent to pulling out the mandrel after laying carbon fiber prepreg on the mandrel, and putting the preformed product into the mold cavity of the split die to form and solidify); the mandrel The design principle is to determine the outer diameter size according to the inner diameter of the product (because the product shape is known). Of course, it cannot be considered that the inner diameter of the product is the outer diameter of the mandrel, because the mandrel must be put on the nylon air bag in advance. , the thickness of the air bag is about 0.05mm. When preparing the shape of the product, it is necessary to reserve a margi...

specific Embodiment 2

[0073] It is basically the same as the specific embodiment, the only difference is:

[0074] 1. In step (3), place the cut nylon air bag 8 in the coating agent and soak for 2 hours;

[0075] 2. Step (9) thermoforming comprises the following steps:

[0076] (91), the thermocompression molding machine is heated up to 128 ℃;

[0077] (92), one end of the trachea made of steel is connected to the air compressor, and the other end is connected to the nylon air nozzle 6, and the nylon air bag 8 is pressurized by the air compressor, and the pressure is 99psi;

[0078] (93), the step (8) mold is placed on the workbench of the thermocompression molding machine, and the thermocompression molding machine is clamped, and the pressure of the step (8) mold is pressurized by 9.9Mpa, and solidified for 123min.

specific Embodiment 3

[0079] It is basically the same as the specific embodiment, the only difference is:

[0080] 1, 1, step (3) the nylon air bag 8 that is cut through is placed in the coating agent soaking time is 3 hours;

[0081] 2. Step (9) thermoforming comprises the following steps:

[0082] (91), the thermocompression molding machine is heated up to 132 ℃;

[0083] (92), one end of the trachea made of steel is connected to the air compressor, and the other end is connected to the nylon air nozzle 6, and the nylon air bag 8 is pressurized by the air compressor, and the pressure is 102psi;

[0084] (93), the mold of step (8) is placed on the workbench of the thermocompression molding machine, and the thermocompression molding machine is clamped, and the pressure of step (8) mold is pressurized by 10.1Mpa, and solidified for 117min.

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Abstract

The invention relates to a method for manufacturing an antenna rib. The method comprises the following steps that (1) a mould of the antenna rib is prefabricated and polished; (2) a core membrane is manufactured; (3) a nylon air bag is soaked with coating agents and then aired for standby application; (4) the nylon air bag is wound on the core membrane through adhesive tape; (5) a pre-forming body is manufactured; (6) the core membrane is pulled out; (7) the pre-forming body is placed in a mould cavity of a lower female mould, and each of the two ends of the pre-forming body is connected with a nylon air nozzle in a fastening mode; (8) mould assembly is carried out; (9) hot press molding is carried out; (10) cold press molding is carried out; (11) after demoulding, grinding and punching are carried out; (12) after the test is qualified, the antenna rib is obtained. A double-forming structure of an external mould and the core membrane is used, the size of a formed inner cavity of an original hot press tank is ensured, the most important appearance size and the parabola precision of the rib are improved, the precision of the rib reaches 0.012, and the method completely meets and exceeds the design requirement.

Description

technical field [0001] The invention relates to a method for preparing composite materials, in particular to a method for manufacturing antenna ribs. Background technique [0002] With the development of my country's communication industry, communication satellites are increasingly showing their important status. The communication antenna system on the communication satellite is its key equipment. In order to increase the sending and receiving frequency of communication satellite signals and reduce signal loss, the manufacturing precision of satellite antennas is highly required. Satellite antennas are exposed to the space environment, and antenna materials and structures must withstand the test of the space environment. [0003] The antenna rib of the satellite antenna is an important component in the structure of the antenna reflector. Its function is to provide precision support for the antenna reflector. It has strict requirements on its accuracy and dimensional stabil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/34B29C33/38B29C33/58
CPCB29C33/3842B29C70/342
Inventor 叶荣森谷建巍姚愿红宋金鹏
Owner XIAN TUOFEI COMPOSITE MATERIAL
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