High-precision antenna reflector forming process

Abstract

The invention discloses a high-precision antenna reflector forming process. A first impact forming of a reflector inner layer and a reflector outer layer is carried out; compression molding of the reflector inner layer and the reflector outer layer is carried out by using a secondary forming die to form the high-precision antenna reflector. According to the invention, cambered surface precision is improved by utilizing precision of the secondary forming die and interaction between stretching and compression stress generated simultaneously in a forming process; different back reinforced structure forms are adopted to meet different product operation requirements; not only reflector springback is reduced, but also reflector strength is improved; antenna reflector gain is improved; noise coefficient is decreased; and the high-precision antenna reflector forming process is beneficial to signal reception and signal transmission.

Description

technical field [0001] The invention relates to a satellite TV ground receiving device, and especially designs a high-precision antenna reflective surface forming process. Background technique [0002] At present, for high-precision antenna reflectors, the level of gain is the main performance index. [0003] gain ……………Formula 1 [0004] G: Gain [0005] λ: the wavelength of the received signal, the higher the frequency, the shorter the wavelength [0006] A 0 : Effective area of ​​the antenna face [0007] e A : Antenna Efficiency [0008] where the antenna efficiency e A =e i e b e x e ph e s e δ …………Formula 2 [0009] e i : Amplitude irradiation efficiency [0010] e b : Aperture blocking efficiency [0011] e x : Cross-polarization efficiency [0012] e ph : Phase error efficiency [0013] e s : Leakage efficiency [0014] e δ : Surface Error Efficiency of Reflecting Surface [0015] Among them, the surface error efficiency of the reflective s...

AI Technical Summary

Problems solved by technology

[0020] Currently commercially available satellite TV receiving equipment, its high-precision antenna reflection surface is mainly made of aluminum plate and angle steel, glass fiber reinforced plastic material, carbon fiber material, steel plate material with spinning process, etc. These methods have high material cost and high cost for the processing of product parts. The production cycle is long, the production cost is high, and it is not conducive to mass production and other defects; among them, the steel plate material adopts the spinning process and is limited by the shape of the product, so it is only suitable for the feed-forward reflective surface of the symmetrical rotary axis

[0021] Stamping is a relatively common forming method in industrial design, which can effectively solve the problems in the above-mentioned forming process, but almost all metal materials have the problem of rebound after stamping, and the rebound of the reflective surface will cause the antenna The gain of the reflector decreases and the noise figure increases, which is not conducive to signal reception and transmission. If the rebound deformation is too large, it cannot be used as a high-precision transceiver antenna.

[0022] In order to solve the problem of springback, the existing high-precision antenna reflective surface forming process also adopts different methods: such as method 1: modify the theoretical curve / surface of the mold, and take the error of springback into the molding process of the mold, so that the parts The stamping deformation surface in the production process is larger than the theoretical surface of the part. This method is only suitable for high-quality materials with good tensile properties. Its disadvantages are that a set of molds has poor versatility for materials. The strength is poor, and it is not suitable for the production of reflective surfaces with a diameter of 1.0 meters and above; the second disadvantage is that it is not suitable for irregularly shaped parts, and the deformation of irregularly shaped parts is irregular, and the raw materials of different manufacturers have different springback and stress. There are slight differences, and it is impossible to meet the ideal accuracy requirements

[0024] 1. The skin curved panel and the supporting bone curved panel are formed by stretching technology, and there are problems pointed out in the above method 1.

[0025] 2. The material of the reflective surface in this patent is limited to aluminum alloy and has been quenched. Compared with ordinary carbon structural steel, this material has the disadvantages of high cost and low strength, and has no price advantage in the fierce market competition.

[0026] 3. In this patent, in order to increase the stiffness of the reflective surface, the aluminum alloy Z-shaped rib beam designed to support the back surface of the curved bone plate is formed by a stretching process. The Z-shaped profile of this processing technology needs to be stretched The clamping parts at both ends add about 100mm of processing auxiliary materials, so the utilization rate of materials is not high; in addition, due to the asymmetrical shape of the Z profile, the tensile force it receives during the stretching process is also asymmetrical. Therefore, there is a difference between the actual arc surface and the theoretical arc surface after stretching. In order to improve the accuracy of the arc surface, a correction process is usually added, so the production efficiency is low. The accuracy of the arc surface is greatly affected by human operation factors, which is not conducive to the product. quality stability

Therefore, in this high-precision molding process, it is necessary to have corresponding supporting facilities to provide vacuum negative pressure. In mass production, products need to be equipped with more supporting facilities. The corresponding maintenance and maintenance related costs are high and energy consumption is high, which reduces the product quality market competitiveness

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