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Winding forming method of variable-taper heat-proof layer

A technology of winding forming and heat-proof layer, applied in the field of winding and forming of variable-taper heat-proof layer, can solve the problems of increasing production process, easy shortage of materials, and high mold cost, achieving high continuous productivity and production efficiency, and good application prospects. , the effect of excellent molding quality

Inactive Publication Date: 2018-12-14
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among the above schemes, the processing scheme will cause waste of raw materials; the docking scheme will increase the production process and prolong the production cycle; the mold cost in the molding scheme is high, and the sudden change of the cone angle is prone to material shortage, and it is not suitable for thin-walled structures

Method used

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  • Winding forming method of variable-taper heat-proof layer
  • Winding forming method of variable-taper heat-proof layer

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Embodiment

[0039] Such as figure 1 with figure 2 As shown, the product is a double cone angle rotary body structure, the total length of the product is 400mm, and the diameter of the small end is length is The cone angle is The big end taper angle is The thickness requirement is 20mm. The material adopts high silicon oxygen / phenolic material system. The mold design cone angles are 16° and 4° respectively. Within the scope of the product area, the diameter of the small end of the mold is 399.8mm, and the diameter of the mold at the corner is 400+200×tan16° ×2=514.70mm, the diameter of the big end of the mold is 514.70+200×tan4°×2=542.67mm; considering that the airflow at the small end is more serious, the winding angle of the small end is designed to be 15°, and the winding angle of the big end is 15+16- 4=27°, the theoretical fabric width of the small end is 20 / sin15°≈80mm, the theoretical fabric width of the big end is 20 / sin27°≈44mm, considering the machining allowance and tap...

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Abstract

The invention relates to a winding forming method of a variable-taper heat-proof layer and belongs to the technical field of composite forming. The overall size of a mold is designed according to thestructural size of a product; the winding angle of a large end and cloth strip width of each taper section are set according to the angle of each taper section of the product and the thickness of theheat-proof layer; the single taper section is regarded as the single taper angle for inclined winding, and winding cloth strips for the nest taper section are replaced for transition in a range of 5-20 mm before winding to the next taper section; finally, an isolation material of a whole product blank is bond and cured, demolding is performed after cooling, and a multi-taper-section heat-proof product is obtained. The product has good integrity and ablation resistance.

Description

technical field [0001] The invention relates to a winding forming method of a variable taper heat-proof layer, which belongs to the technical field of composite material forming. Background technique [0002] The aerospace vehicle will experience a complex aerodynamic environment during flight, and the external temperature can reach 1000-2000°C, or even higher. In order to ensure the normal use of the internal instruments and equipment of the aircraft, there is an ablation material layer on the outside of the metal shell. Under the action of heat flow, the ablation material undergoes various physical and chemical changes such as decomposition, melting, evaporation, sublimation, etc., and takes away a large amount of heat through the mass consumption of the material itself, thus playing the role of anti-heat insulation. It has high heat protection efficiency and work It is the most commonly used thermal protection material for spacecraft and has a wide range of applications. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/32
CPCB29C70/32
Inventor 王晓静李寅操亚平吴文敬赵宇宁高玉光李毅邓立松张朝辉
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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