A high-precision carbon fiber sub-reflective surface forming method
A technology of sub-reflector and forming method, which is applied to antennas, electrical components, etc., can solve the problems of poor accuracy, permanent deformation, and unstable precision of metal sub-reflectors, and achieves mild fatigue resistance and lightening Good effect of load and thermal stability
Active Publication Date: 2017-10-03
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP +1
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Problems solved by technology
[0008] 3. When used in areas with large environmental temperature differences such as polar regions, the accuracy of the metal secondary reflector is relatively poor. Due to the large thermal expansion coefficient of the metal, it will deform with the change of environmental temperature difference, resulting in unstable accuracy and even permanent deformation. cause loss of function
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[0041] Such as figure 1 As shown, the present invention includes a front skin 1, a middle skin 2, and a rear skin 3 that are stacked in sequence. The front skin 1 includes a composite metal reflective layer 1-1 and a front skin carbon fiber The cladding layer 1-2, the front skin carbon fiber cladding layer 1-2 is paved on the upper surface of the metal reflective layer 1-1, the front skin carbon fiber cladding layer 1-2, the middle skin 2 and the rear skin 3 are made of carbon fiber material, the lower sandwich core 4-1 is sandwiched between the front skin 1 and the middle skin 2, and the upper sandwich core 4-1 is sandwiched between the middle skin 2 and the upper skin 3 The core 4-2, the front skin 1, the lower sandwich core 4-1, the middle skin 2, the upper sandwich core 4-2, and the rear skin 3 are compounded and solidified into an integrated structure, and the integrated structure has a concave cavity The disc shape is filled with foam in the concave cavity of the rear s...
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Abstract
A high-precision carbon fiber sub-reflector forming method is provided. First, the mathematical model of the front, middle and rear skin surfaces is established by using design software, and the front, middle and rear molds are designed according to each mathematical model, and the front mold is manufactured. For the front skin with a metal reflective surface, the middle skin is made of carbon fiber prepreg on the middle skin mold, the rear skin is made of carbon fiber prepreg on the rear mold, and the front, middle and rear Carry out co-curing treatment, co-cure to form an integrated sub-reflecting surface, use foam to foam in the concave cavity of the sub-reflecting surface, seal the carbon fiber sealing plate after smoothing to make a high-precision carbon fiber sub-reflecting surface, the present invention adopts carbon fiber composite material As a skin, it has the advantages of acid resistance, salt spray resistance, and seawater resistance. The obtained high-precision secondary reflector is suitable for use in humid environments such as coastal areas and shipboards.
Description
technical field [0001] The invention belongs to the field of reflective panels working in the Ka frequency band and above, and particularly relates to a high-precision carbon fiber secondary reflective surface forming method. Background technique [0002] With the rapid development of communication, measurement and control, and radio astronomy technology, the working frequency band is getting higher and higher, and the demand for large and medium-sized antennas is becoming more and more extensive. The antenna sub-reflector, one of the important components, also faced greater challenges. [0003] So far, the definition of high precision at home and abroad is still the mean square error of the antenna profile (r.m.s.)≦λ / 100, and the mean square error of the cm wave antenna profile is required to be 10 -1 order of magnitude, the mean square error of the mm wave antenna should be 10 -2 order of magnitude. The accuracy of the secondary reflector of the antenna is higher than t...
Claims
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IPC IPC(8): H01Q15/16
Inventor 宁晓磊王海东刘建弟黄光耀
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP