A Closed Angle Inner Pressurization Process Suitable for Composite Hard Adhesive Bonding Structure
A composite material and joint structure technology, which is applied to household components, household appliances, and other household appliances, can solve the problems of inapplicable metal tooling, many closed-angle areas, and small operating space in the inner cavity of parts, so as to achieve good design and use. effect, prevent parts misalignment, and ensure the effect of bonding quality
Active Publication Date: 2017-04-26
JIANGXI HONGDU AVIATION IND GRP
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Problems solved by technology
Due to the small operating space in the inner cavity of the part and many closed corner areas, it brings great difficulty to the process of demoulding and the control of the gap between the glued surfaces. Traditional metal tooling is no longer applicable.
Method used
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Embodiment
[0021] Example: see figure 1 .
[0022] A closed-angle internal pressurization process suitable for composite hard glue joint structures, the steps of which are as follows:
[0023] 1) Fabrication of FRP blocks: use the bonding part 2 as a negative mold, lay 120-160 layers of EW210 FRP prepreg in the inner cavity of the bonding part 2, and cure it by vacuum bag molding in an autoclave;
[0024] 2) FRP block modification: modify the FRP block 4 according to the fit;
[0025] 3) FRP block opening: open two threaded holes 6 on the FRP block 4;
[0026] 4) Production of the expanded rubber block: place the FRP block 4 on the flat plate, block it with a ruler around it, slowly pour the aircast3700 brand expanded rubber mixture onto the FRP block, cover the entire surface, with a thickness of 3-4 mm, and cure at room temperature;
[0027] 5) Modification of the expanded rubber block: Properly modify the expanded rubber block 3 according to the fit;
[0028] 6) Cover the glass fi...
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The invention relates to the field of airplane composite material adhesive joint, in particular to a closed-corner internal pressurization process suitable for a composite material hard adhesive joint structure. The process includes the following steps of (1), manufacturing a glass fiber reinforced plastic block; (2), modifying the shape of the glass fiber reinforced plastic block; (3), perforating the glass fiber reinforced plastic block; (4), manufacturing an expanding rubber block; (5), modifying the shape of the expanding rubber block; (6), wrapping the glass fiber reinforced plastic block and the expanding rubber block with imporous isolating films; (7), placing the wrapped glass fiber reinforced plastic block into an inner cavity of an adhesive joint part; (8), placing the wrapped expanding rubber block on the glass fiber reinforced plastic block, making the wrapped expanding rubber block closely attached to the upper flange surface of the adhesive joint part, and guaranteeing that all matching portions are in a free state instead of being forced; (9), fixing the expanding rubber block to the glass fiber reinforced plastic block through pressure-sensitive adhesive tape; (10), performing adhesive joint heating curing; and (11), taking out the glass fiber reinforced plastic block after adhesive joint heating curing forming. According to the process, the adhesive joint quality of parts is guaranteed, dislocation of the parts is avoided, and excellent design and use effects are achieved.
Description
technical field [0001] The invention relates to the field of aircraft composite material gluing, in particular to a closed-angle internal pressurization process suitable for composite hard gluing structures. Background technique [0002] Since the beginning of this century, various composite materials and composite structures have come out one after another and have been widely used in various fields. Due to the continuous improvement of aircraft's requirements for shape accuracy, the composite material bonding process that controls the shape with a metal mold and applies pressure through the product cavity is becoming more and more popular. Due to the small operating space in the inner cavity of the part and the many closed corner areas, it brings great difficulty to the process of demoulding and the control of the gap between the glued surfaces, and the traditional metal tooling is no longer suitable. Contents of the invention [0003] The object of the present inventio...
Claims
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IPC IPC(8): B29C65/70B29L31/30
Inventor 龚文马军高慧聪胡芳芝李跃李云龙梅钦海敖春燕
Owner JIANGXI HONGDU AVIATION IND GRP