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Preparation method of special-shaped negative curvature composite ceramic wave-transparent radome based on winding forming

A technology of composite ceramics and winding molding, which is applied to ceramic molding machines, manufacturing tools, etc., can solve the problems that fabrics cannot be woven with negative curvature, long process cycle, and prone to wrinkles, so as to avoid extremely easy wrinkles and improve densification The effect of speed and productivity improvement

Active Publication Date: 2019-08-23
湖北三江航天江北机械工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the body of the quartz composite ceramic radome is mostly woven into a fiber fabric prefabricated part of a certain structure with fiber or fiber cloth, and then compounded by vacuum impregnation or liquid phase infiltration, and finally sintered and formed. However, this quartz The molding process of composite ceramic radome has a long cycle and relatively high cost, which has become a common problem in the process
In addition, for the radome cover products with negative curvature special-shaped structure, under the existing process, wrinkles are easily produced when weaving the special-shaped structure, and even for fabrics with 2.5D structure, there is a problem that negative curvature weaving cannot be performed.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Preparation method of special-shaped negative curvature composite ceramic wave-transparent radome based on winding forming
  • Preparation method of special-shaped negative curvature composite ceramic wave-transparent radome based on winding forming
  • Preparation method of special-shaped negative curvature composite ceramic wave-transparent radome based on winding forming

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Embodiment 1

[0042] A preparation method for a special-shaped negative-curvature composite ceramic radome cover body of a certain type of weapon system, the cross-sectional major axis of the special-shaped negative-curvature composite ceramic radome cover body is 400mm, the short axis is 400mm, and the length is 1200mm, including the following steps:

[0043] 1) Mandrel preparation: design and prepare the shaped mandrel and the winding mandrel according to the structure and size of the radome body, as shown in the figure, the shaped mandrel 1 has a negative curvature concave surface, and the winding mandrel 2 has a positive curvature convex shape In terms of surface, the negative curvature concave surface of the shaping mandrel 1 and the positive curvature convex surface of the winding mandrel 2 are mirror images; the shaping mandrel 1 and the winding mandrel 2 both have an open end and a closed end, and the opening size is determined by the opening end It gradually decreases toward the clo...

Embodiment 2

[0052] A preparation method for a special-shaped negative-curvature composite ceramic radome cover body of a certain type of weapon system, the long axis of the section of the special-shaped negative-curvature composite ceramic radome cover body is 300mm, the short axis is 150mm, and the length is 600mm, including the following steps:

[0053] 1) Mandrel preparation: design and prepare the shaped mandrel and the winding mandrel according to the structure and size of the radome body, as shown in the figure, the shaped mandrel 1 has a negative curvature concave surface, and the winding mandrel 2 has a positive curvature convex shape In terms of surface, the negative curvature concave surface of the shaping mandrel 1 and the positive curvature convex surface of the winding mandrel 2 are mirror images; the shaping mandrel 1 and the winding mandrel 2 both have an open end and a closed end, and the opening size is determined by the opening end It gradually decreases toward the closed...

Embodiment 3

[0062] A preparation method for a special-shaped negative-curvature composite ceramic radome cover body of a certain type of weapon system, the cross-sectional major axis of the special-shaped negative-curvature composite ceramic radome cover body is 500mm, the short axis is 300mm, and the length is 1600mm, including the following steps:

[0063] 1) Mandrel preparation: design and prepare the shaped mandrel and the winding mandrel according to the structure and size of the radome body, as shown in the figure, the shaped mandrel 1 has a negative curvature concave surface, and the winding mandrel 2 has a positive curvature convex shape In terms of surface, the negative curvature concave surface of the shaping mandrel 1 and the positive curvature convex surface of the winding mandrel 2 are mirror images; the shaping mandrel 1 and the winding mandrel 2 both have an open end and a closed end, and the opening size is determined by the opening end It gradually decreases toward the clo...

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Abstract

The invention discloses a preparation method of a special-shaped negative-curvature composite ceramic wave-transparent radome body based on winding formation. The preparation method comprises the following steps of 1, preparing a core mold; 2, compounding an oxidation silica gel solution; 3, winding fibers; 4, shaping a prefabricated blank material; 5, curing a radome body blank material; 6, dipping and compositing a radome body blank body; 7, repeating step 6 1-4 times till the density index requirement for the radome body is met; and 8, conducting sintering formation and processing. According to the preparation method of the special-shaped negative-curvature composite ceramic wave-transparent radome body based on winding formation, a silicon dioxide base material is introduced in the process when fiber fabrics are woven for formation; performance of a quartz composite ceramic material can be designed and adjusted by designing and adjusting the structures and parameters such as the structural orientation of the fiber fabrics, the volume content of the fibers, the density of composites and the porosity; and in addition, the preparation cycle is short, and cost is low.

Description

technical field [0001] The invention relates to the technical field of preparation of wave-transparent composite ceramic materials for missiles, in particular to a preparation method for a special-shaped negative-curvature composite ceramic wave-transparent radome based on winding molding. Background technique [0002] Quartz composite ceramic radome has the characteristics of high strength, high temperature resistance, ablation resistance, broadband wave penetration, etc. It is used to protect the high Mach missile guidance antenna and ensure the normal operation of the radar system. [0003] At present, the body of the quartz composite ceramic radome is mostly woven into a fiber fabric prefabricated part of a certain structure with fiber or fiber cloth, and then compounded by vacuum impregnation or liquid phase infiltration, and finally sintered and formed. However, this quartz The molding process of composite ceramic radome has a long cycle and relatively high cost, which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28B1/42B28B1/38B28B11/24C04B35/82C04B35/622C04B35/14
Inventor 吴广力佘平江王芬金秀秀
Owner 湖北三江航天江北机械工程有限公司
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