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Co-curing forming method of airplane spherical frame

A curing molding, spherical frame technology, used in other household appliances, household appliances, household components, etc., can solve the problems of low fiber volume content, large differences in resin wettability, poor fatigue resistance, and poor corrosion resistance, achieving simplification The effect of molding process, shortened manufacturing cycle, and stable molding quality

Inactive Publication Date: 2020-08-07
海鹰空天材料研究院(苏州)有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the spherical frames of composite materials are mostly formed by the resin film immersion molding (RFI) process or the vacuum assisted liquid molding (VARTM) process, such as the spherical frames of A380 and B787. During the process, due to the different surface states of the fibers, the wettability of the resin is very different, and finally the porosity of the part after curing is large, the fiber volume content is low, and the fatigue resistance and corrosion resistance are poor.

Method used

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  • Co-curing forming method of airplane spherical frame

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Embodiment Construction

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0027] In order to achieve the above object, the present invention provides a co-curing molding method for an aircraft spherical frame, comprising the following steps:

[0028] Step 1: Fix the foam blank with a fixture, start the five-axis machine tool, and machine the outer surface of the foam blank according to the part digital model. The foam blank is machined into a long foam clip with a trapezoidal cross section core.

[0029] Step 2: Support and fix the...

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Abstract

The invention discloses a co-curing forming method of an airplane spherical frame. The method comprises the following steps of firstly, foam core sandwich panel machining forming; secondly, paving ofprepreg sheets of a cap-shaped stringer; thirdly, positioning and mold assembly of a foam core sandwich panel stringer; fourthly, spherical skin paving forming; and fifthly, co-curing integrated forming. The spherical skin paving efficiency is high, and the manufacturing period can be shortened.

Description

technical field [0001] The invention relates to the technical field of structural and functional integrated aviation material molding, in particular to a co-curing molding method for an aircraft spherical frame. Background technique [0002] The spherical frame is the rear end frame of the middle and rear fuselage of the aircraft, which mainly bears the airtight pressure. Most of the traditional spherical frames are made of metal structure, and the parts are heavy, so they are gradually replaced by composite materials with higher specific strength and specific stiffness. At present, the spherical frames of composite materials are mostly formed by the resin film immersion molding (RFI) process or the vacuum assisted liquid molding (VARTM) process, such as the spherical frames of A380 and B787. Although these process forms are simple and easy to operate, the resin liquid is injected During the process, due to the different surface states of the fibers, the wettability of the ...

Claims

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Application Information

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IPC IPC(8): B29C70/38B29C70/34B29C70/54B29L31/30
CPCB29C70/342B29C70/382B29C70/54B29L2031/3082
Inventor 倪敏轩唐中华陈超张帅刘秀张智佳嵇培军
Owner 海鹰空天材料研究院(苏州)有限责任公司