Composite T-shaped stiffened wallboard co-bonding forming method capable of eliminating edge wrinkles

Abstract

The invention discloses a composite material T-shaped stiffened wallboard co-bonding forming method capable of eliminating edge wrinkles, and the method comprises the following steps: co-bonding of a T-shaped stringer and a stiffened skin wallboard, bag making and vacuumizing, hot pressing and curing, and demolding. Edge wrinkles of the T-shaped stringer on the stiffened skin wallboard are effectively eliminated, vacuum hot-pressing curing forming is adopted, the curing pressure in the T-shaped stringer forming process is more uniform, and the risk of wrinkles of the skin gluing face of the T-shaped stringer and the stiffened skin wallboard is reduced. According to the T-shaped stringer, uniform conduction of tank pressure is facilitated, heat transfer in the curing process is more uniform, and the internal quality of the T-shaped stringer made of the composite material is easy to guarantee, so that the thickness of the T-shaped stringer made of the composite material is not affected while the internal quality of the T-shaped stringer is not affected, the manufacturing cost of the T-shaped stringer made of the composite material is reduced, and the manufacturing process is simplified.

Description

Technical Field

[0001] The invention belongs to the technical field of composite material manufacturing, and in particular relates to a composite material T-shaped reinforced wall panel co-bonding forming method for eliminating edge wrinkles. Background Art

[0002] In the forming of composite T-shaped reinforced wall panels, there is a process scheme that is to co-bond the cured T-shaped long stringer with the uncured skin wall panel. The advantage of this process scheme is that the manufacture of the T-shaped long stringer is completed first. During the co-bonding, the forming mold of the T-shaped long stringer does not need to participate in the curing process in the autoclave. It is more suitable for the manufacture of wall panels with a large number of T-shaped long stringers or more complex shapes of T-shaped long stringers.

[0003] The disadvantage of this process is that when the T-shaped long stringer is glued to the inner surface of the skin wall panel, a step will be formed at the joint of the bevel edge of the bottom edge of the T-shaped long stringer and the skin wall panel. If the packaging method is not paid attention to, skin wrinkles, adhesive accumulation or resin accumulation will often appear at the joint of the bevel edge of the bottom edge of the T-shaped long stringer and the skin wall panel. In severe cases, the porosity in this area will increase and stratification will occur. For this reason, we propose a co-bonding molding method for composite T-shaped reinforced wall panels that eliminates edge wrinkles. Summary of the invention

[0004] The object of the present invention is to provide a composite material T-shaped reinforced wall panel co-bonding molding method which eliminates edge wrinkles, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a composite material T-shaped reinforced wall panel co-bonding molding method for eliminating edge wrinkles, comprising the following steps: S1. T-shaped long stringer and reinforced skin panel are glued together: The reinforced skin wall panel is laid on the wall panel tooling by an automatic tape laying method, and then the T-shaped long stringer is placed on the reinforced skin wall panel, and the T-shaped long stringer is positioned and co-bonded by a detachable positioning device and a laser projection device. After the co-bonding is completed, the detachable positioning device is removed to obtain a T-shaped reinforced wall panel co-bonded prefabricated part; S2, bag making and vacuuming: A layer of wet peelable cloth is laid on both ends of the T-shaped long stringer and a pressing block is placed thereon, and then the insulating material and the breathable felt are laid on the T-shaped reinforced wall panel co-bonded prefabricated part in sequence, and the breathable felt is disconnected at the beveled edge of the bottom edge of the T-shaped long stringer, and then the T-shaped reinforced wall panel co-bonded prefabricated part is put into a vacuum bag as a whole, and after the vacuum bag is sealed, a vacuum nozzle is put into the vacuum bag, and the vacuum bag is evacuated to make the insulating material, the breathable felt and the vacuum bag closely attached to the T-shaped reinforced wall panel co-bonded prefabricated part; S3, hot pressing curing: Check the sealing status of the vacuum bag after evacuation. When the vacuum bag meets the requirements, send the vacuum bag into the autoclave for curing; S4, demoulding: After the T-shaped reinforced siding co-bonded prefabricated parts are cured, the vacuum bag, the breathable felt and the isolation material are removed, and the pressed blocks are demoulded by wet peelable cloth to obtain the composite material T-shaped reinforced siding parts.

[0006] Preferably, in S1, the specific steps of gluing the T-shaped long stringer and the reinforced skin panel together are as follows: The positions of the cured T-shaped long stringers and the uncured skin on the reinforced skin panels are determined by projection positioning and then bonded together by adhesive film.

[0007] Preferably, in S2, the air-permeable felt is an air-permeable felt woven from polyester non-woven material.

[0008] Compared with the prior art, the present invention has the following beneficial effects: The invention provides a method for facilitating the bonding of the T-shaped panels to the outer wall of the T-shaped panel and preventing the panel from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of laying out the reinforced skin wall panel of the present invention; Figure 2 It is a structural schematic diagram of the T-shaped long stringer and the reinforced skin wall panel of the present invention being co-glued and positioned; Figure 3 It is a schematic diagram of the bagging and vacuuming structure of the T-shaped reinforced wall panel co-gluing prefabricated parts of the present invention; Figure 4 This is a schematic diagram of the structure of placing a pressing block at the end of a T-shaped long stringer of the present invention; Figure 5 It is a metallographic diagram of the skin folds without a pressing block placed at the end of a T-shaped long stringer of the present invention; Figure 6A schematic diagram of the metallographic structure of the skin with a pressing block placed at the end of a T-shaped long stringer of the present invention; Figure 7 A schematic diagram of the metallographic wrinkles at the bottom bevel edge of a T-shaped long stringer on a reinforced skin panel without using the method of the present invention; Figure 8 The figure is a metallographic diagram of the bottom bevel edge of the T-shaped long stringer on the reinforced skin wall panel using the method of the present invention.

[0010] In the figure: 1. Reinforced skin panel; 2. Panel tooling; 3. T-shaped long stringer; 4. Wet-peelable cloth; 5. Press block; 6. Isolation material; 7. Breathable felt; 8. Vacuum bag. DETAILED DESCRIPTION

[0011] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0012] See also Figure 1-Figure 4 The present invention provides a composite material T-shaped reinforced wall panel co-bonding forming method for eliminating edge wrinkles, comprising the following steps: S1. T-shaped long stringer and reinforced skin panel are glued together: The reinforced skin wall panel 1 is laid on the wall panel tooling 2 by an automatic tape laying method, and then the T-shaped long stringer 3 is placed on the reinforced skin wall panel 1, and the T-shaped long stringer 3 is positioned by a detachable positioning device and a laser projection device, and the positions of the solidified T-shaped long stringer and the unsolidified skin on the reinforced skin wall panel are determined by projection positioning, and then they are bonded together by adhesive film. After the co-bonding is completed, the detachable positioning device is disassembled and removed to obtain a T-shaped reinforced wall panel co-bonded prefabricated part; S2, bag making and vacuuming: A layer of wet peelable cloth 4 is laid on both ends of the T-shaped long stringer 3 and a pressing block 5 is placed thereon, and then the insulating material 6 and the breathable felt 7 are laid on the T-shaped reinforced wall panel co-bonded prefabricated part in sequence. The insulating material 6 is an insulating film, which can isolate the resin, ensure the quality of the parts and prevent the solidification bag from bursting. The breathable felt is a breathable felt woven from polyester non-woven material. The breathable felt has good absorption performance and can absorb additional resin or serve as a medium in the vacuum process. The breathable felt 7 is disconnected at the bevel edge of the bottom edge of the T-shaped long stringer 3, and then the T-shaped reinforced wall panel co-bonded prefabricated part is placed in a vacuum bag 8 as a whole. After the vacuum bag 8 is sealed, a vacuum nozzle is placed in it, and the vacuum bag 8 is evacuated to make the insulating material 6, the breathable felt 7 and the vacuum bag 8 close to the T-shaped reinforced wall panel co-bonded prefabricated part; S3, hot pressing curing: Check the sealing state of the vacuum bag 8 after evacuation, and when the vacuum bag 8 meets the requirements, send the vacuum bag 8 after evacuation into the autoclave for curing; S4, demoulding: After the T-shaped reinforced siding co-bonded prefabricated parts are cured, the vacuum bag 8, the air-permeable felt 7 and the insulating material 6 are removed, and the pressing block 5 is demoulded by the wet peelable cloth 4 to obtain the composite material T-shaped reinforced siding parts.

[0013] In this embodiment, Figure 5-Figure 8 As shown in the figure, the composite material T-shaped reinforced wall panel after demoulding is tested. Figure 5 and Figure 6 It can be seen that the folds at the ends of the T-shaped long trusses disappear significantly after the pressure blocks are placed at the ends of the T-shaped long trusses. Figure 7 and Figure 8 Combination Figure 3 It can be seen that the air permeable felt is disconnected at the bevel edge of the bottom edge of the T-shaped long stringer, which effectively eliminates the wrinkle problem at the glue joint between the bevel of the bottom edge of the T-shaped long stringer and the skin of the reinforced skin wall panel. At the same time, the removal of the metal cover during the curing process does not affect the internal quality of the T-shaped long stringer, thereby reducing production costs.

[0014] In the present invention, a layer of wet peelable cloth 4 is laid on both ends of the T-shaped long stringer 3 and a pressing block 5 is placed thereon, and then the isolation material 6 and the breathable felt 7 are laid on the T-shaped reinforced wall panel co-bonded prefabricated part in sequence, and the breathable felt 7 is disconnected at the bevel edge of the bottom edge of the T-shaped long stringer 3 to avoid the vacuum bag bridging phenomenon at the bevel edge of the bottom edge of the T-shaped long stringer 3, effectively eliminating the edge wrinkles of the T-shaped long stringer 3 on the reinforced skin wall panel 1, and the vacuum hot pressing curing molding is adopted, so that the curing pressure during the forming process of the T-shaped long stringer is more uniform, reducing The risk of wrinkles on the adhesive joint surface between the T-shaped long stringer and the reinforced skin wall panel 1 is reduced, and the present invention removes the metal cover plate during the curing process of the T-shaped long stringer, so that the T-shaped reinforced wall panel co-bonded prefabricated parts have good openness, which is conducive to the uniform conduction of the tank pressure, and the heat transfer during the curing process is more uniform, so that the internal quality of the composite material T-shaped reinforced wall panel parts is easy to ensure, so when the internal quality of the T-shaped long stringer is guaranteed, the thickness is also guaranteed, thereby reducing the manufacturing cost of the composite material T-shaped reinforced wall panel parts and simplifying the manufacturing process.

[0015] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A composite material T-shaped reinforced wall panel co-bonding forming method for eliminating edge wrinkles, characterized in that: The steps include: S1. T-shaped long stringer and reinforced skin panel are glued together: The reinforced skin wall panel is laid on the wall panel tooling by an automatic tape laying method, and then the T-shaped long stringer is placed on the reinforced skin wall panel, and the T-shaped long stringer is positioned and co-bonded by a detachable positioning device and a laser projection device. After the co-bonding is completed, the detachable positioning device is removed to obtain a T-shaped reinforced wall panel co-bonded prefabricated part; S2, bag making and vacuuming: A layer of wet peelable cloth is laid on both ends of the T-shaped long stringer and a pressing block is placed thereon, and then the insulating material and the breathable felt are laid on the T-shaped reinforced wall panel co-bonded prefabricated part in sequence, and the breathable felt is disconnected at the beveled edge of the bottom edge of the T-shaped long stringer, and then the T-shaped reinforced wall panel co-bonded prefabricated part is put into a vacuum bag as a whole, and after the vacuum bag is sealed, a vacuum nozzle is put into the vacuum bag, and the vacuum bag is evacuated to make the insulating material, the breathable felt and the vacuum bag closely attached to the T-shaped reinforced wall panel co-bonded prefabricated part; S3, hot pressing curing: Check the sealing status of the vacuum bag after evacuation. When the vacuum bag meets the requirements, send the vacuum bag into the autoclave for curing; S4, demoulding: After the T-shaped reinforced siding co-bonded prefabricated parts are cured, the vacuum bag, the breathable felt and the isolation material are removed, and the pressed blocks are demoulded by wet peelable cloth to obtain the composite material T-shaped reinforced siding parts.

2. The method for co-bonding and forming composite material T-shaped reinforced wall panels with eliminated edge wrinkles according to claim 1, characterized in that: In S1, the specific steps of gluing the T-shaped long stringer and the reinforced skin panel are as follows: The positions of the cured T-shaped long stringers and the uncured skin on the reinforced skin panels are determined by projection positioning and then bonded together by adhesive film.

3. The method for co-bonding and forming composite material T-shaped reinforced wall panels with eliminated edge wrinkles according to claim 1, characterized in that: In S2, the air-permeable felt is an air-permeable felt woven from a polyester non-woven material.

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