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Co-curing molding die for composite material with wallboard structure

A composite material and solidification molding technology, which is applied in the field of composite material molding, can solve problems such as skin indentation, reinforcement rib sinking, and affect the quality of co-cured molding products, so as to avoid indentation and ensure product quality.

Active Publication Date: 2013-09-11
BEIJING AERONAUTICAL MFG TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcoming of this molding die is: the corner between the side of the lower flange of the reinforcing rib 8 and the skin during the co-curing process is prone to bridging phenomenon, which leads to the problem that the pressure transmission is not in place on the skin at this place, resulting in manufacturing The sinking of the ribs and the indentation on the lower surface of the skin will affect the product quality of the co-curing molding

Method used

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  • Co-curing molding die for composite material with wallboard structure
  • Co-curing molding die for composite material with wallboard structure
  • Co-curing molding die for composite material with wallboard structure

Examples

Experimental program
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Embodiment 1

[0018] A composite material reinforced wallboard has 14 I-shaped ribs in total, with a length of 6000mm to 7000mm. This wallboard is formed by one-time co-curing. The scheme of the present invention is:

[0019] (1) Soft mold 4 is a rubber soft mold formed by vulcanizing Airpad rubber. It adopts a structure in which 8 layers of carbon fiber prepreg are added to two layers of Airpad rubber. The thickness of soft mold 4 is equal to the thickness of the flange under the rib; the soft mold 4 covering all areas on the skin 7 except for the ribs 8;

[0020] (2) The left rigid gasket 5 is made of aluminum plate, the cross section of the aluminum plate is quadrilateral, and the transition area between the left side and the upper surface is inclined or rounded;

[0021] (3) The right rigid gasket [6] is also made of aluminum plate, the cross section of the aluminum plate is quadrilateral, and the transition area between the left side and the upper surface is inclined or rounded.

Embodiment 2

[0023] A composite material reinforced wallboard has 3 T-shaped ribs in total, with a length of 4000mm to 5000mm. This wallboard is formed by one-time co-curing. The scheme of the present invention is:

[0024] (1) Soft mold 4 is a rubber soft mold formed by vulcanization of Airpad rubber. It adopts the structure of adding 4 layers of carbon fiber prepreg into two layers of Airpad rubber. The thickness of soft mold 4 is 1mm greater than the thickness of the rib lower flange; Die 4 covers all areas except reinforcing rib 8 on skin 7;

[0025] (2) The rigid gasket 5 on the left side is made of steel plate, the cross-section of the steel plate is quadrilateral, and the transition zone between the left side and the upper surface is inclined or rounded;

[0026] (3) The rigid spacer 6 on the right side is also made of steel plate, the cross-section of the steel plate is quadrangular, and the transition zone between the left side and the upper surface is inclined or rounded.

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Abstract

The invention which belongs to the composite material molding technology relates to an improvement of a co-curing molding die for a composite material with a wallboard structure. The molding die which comprises a sheath molding die [1], and left molding dies [2] and right molding dies [3] of reinforcing ribs is characterized in that: the molding die also comprises a soft die [4], left rigid pads [5] and right rigid pads [6]. The molding die of the invention, which adopts the combination of the soft die [4] with the left rigid pads [5] and the right rigid pads [6] to realize the pressure transmission in the co-curing process, so a problem of the bridging between the reinforcing rib and the sheath combination position in the co-curing molding process of the composite material with the wallboard structure is solved, and the co-curing molded product quality is guaranteed.

Description

technical field [0001] The invention belongs to composite material forming technology, and relates to the improvement of co-curing forming molds for composite material wall board structures. Background technique [0002] Composite materials are widely used in the aerospace field due to their advantages such as high specific strength, high specific stiffness, fatigue resistance, good designability and easy overall forming, and their dosage has become an important indicator to measure the advanced nature of aircraft. Reinforced wall panels are one of the most commonly used structures of composite materials, and are widely used in large-scale airfoil structures and fuselage structures. The cross-sections of the ribs include I-shaped and inverted T-shaped. figure 1 It is a structural schematic diagram of a composite material panel with I-shaped reinforcement, wherein 7 is a composite material skin, and 8 is a composite material I-shaped reinforcement. currently used for figure...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C33/42B29C33/38B29C35/02
Inventor 陈永清杨博王菲曹正华谢富原刘善国
Owner BEIJING AERONAUTICAL MFG TECH RES INST