High-precision copying method of carbon fiber composite space optical mirror plane

A technology of composite materials and space optics, which is applied in the field of high-precision replication of carbon fiber composite material space optics mirrors, to achieve high replication accuracy, high repeatability of mirror surface quality, and the effect of expanding applications

Active Publication Date: 2016-06-08
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Application Information

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For reasons of confidentiality, domestic research institutes rarely see public reports on CFRP mirrors

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  • High-precision copying method of carbon fiber composite space optical mirror plane
  • High-precision copying method of carbon fiber composite space optical mirror plane

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Embodiment Construction

[0024] The present invention will be specifically described below.

[0025] The present invention is a carbon fiber composite material space optical mirror high-precision replication technology, the specific steps are:

[0026] 1) Duplicate mold design and production

[0027] According to the structural characteristics and surface precision requirements of the optical mirror surface, high-precision stainless steel molds are processed by high-precision grinding and polishing technology on the working surface of the stainless steel mold blank. The surface precision of the mold is PV=1μm, RMS=0.1μm, which meets the optical mirror surface Accuracy requirements for replicating molds.

[0028] 2) Design of prepreg parameters and mirror layup sequence

[0029] According to the mechanical performance requirements of the optical mirror, especially the structural rigidity, the lamination sequence of the mirror is designed by using the method of numerical simulation analysis and experi...

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Abstract

The invention relates to a high-precision copying method of a carbon fiber composite space optical mirror plane, particularly relates to an optical mirror plane product which is a spherical-crown or spherical-crown-like curved surface structure and is made of a carbon fiber enhanced cyanic acid composite, and belongs to the technical field of advanced composites. The optical mirror plane is a large-aperture spherical-crown concave surface structure. The mirror plane copying technology comprises the following steps: carrying out technological simulation analysis and experimental confirmation according to surface precision and performance requirements, and determining a suitable cyanate/carbon fiber prepreg system and a prepreg laying sequence; laying prepreg wires of a large-size optical mirror plane with a curved surface structure by using an automatic wire laying technology, accurately controlling a laying angle of the prepreg wires, and guaranteeing high-quality copying at a full laid angle; and curing the laid prepreg by using an autoclave to obtain the copied high-precision optical mirror plane. The copied mirror plane is high in surface precision and high in repeatability and consistency; and compared with manufacturing of the traditional optical mirror plane, the copying technology is short in manufacturing cycle and low in manufacturing cost.

Description

technical field [0001] The invention belongs to the technical field of advanced composite materials, and relates to a method for high-precision duplication of space optical mirror surfaces of carbon fiber composite materials. Background technique [0002] As early as 1981, H.M. Weissman found that a thin epoxy resin layer (between 25 and 100 μm) could reproduce high-precision optical surfaces. Later, this technology was used in the research of the CERGA project in France. The project used a 100μm thick resin layer to successfully reproduce pure epoxy resin mirrors with a diameter of 0.5m and 1m. The microroughness of the mirror in the visible light band is 0.5 nm, surface replication accuracy PV value ≥ λ / 25 (λ is the wavelength of visible light). It can be seen that the use of a resin layer can completely replicate the precision of a glass mold; a thin resin layer can replicate an optical mirror that requires high precision. [0003] NASA's Jet Propulsion Laboratory (JPL)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/38B29C70/44B29B15/10B29L11/00
CPCB29B15/10B29C70/382B29C70/443B29L2011/0016
Inventor 杨智勇张建宝孙宝岗
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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