CN115042453A - Thin-wall tool for manufacturing H-shaped variable cross-section honeycomb sandwich structure composite material product - Google Patents
Thin-wall tool for manufacturing H-shaped variable cross-section honeycomb sandwich structure composite material product Download PDFInfo
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- CN115042453A CN115042453A CN202210712188.7A CN202210712188A CN115042453A CN 115042453 A CN115042453 A CN 115042453A CN 202210712188 A CN202210712188 A CN 202210712188A CN 115042453 A CN115042453 A CN 115042453A
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- Prior art keywords
- tool
- thin
- paving
- layer
- honeycomb
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 239000002131 composite material Substances 0.000 title claims abstract description 16
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 32
- 239000004917 carbon fiber Substances 0.000 claims abstract description 32
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000003365 glass fiber Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 17
- 230000007306 turnover Effects 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims description 33
- 239000010410 layer Substances 0.000 claims description 25
- 239000004744 fabric Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 239000012792 core layer Substances 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 238000009966 trimming Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3076—Aircrafts
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention belongs to the technical field of manufacturing methods of molding tools, and relates to a thin-wall tool for manufacturing H-shaped variable cross-section honeycomb sandwich structure composite material parts. The invention adopts a thin-wall tool, the tool combines the excellent performances of enough rigidity and certain flexibility of the cured carbon fiber, and simultaneously utilizes the advantage of strong plasticity of a glass fiber thin-shell tool to solve the problems of honeycomb area forming and pressurization. The carbon fiber thin-wall tool can be used for a long time, is light in weight, is beneficial to the operation of paving and demolding processes, is low in cost, needs to be newly manufactured for each piece to ensure the molding quality of a honeycomb region, and is quick, simple and convenient to manufacture. The invention realizes the reversal, turnover and paving of the prepreg by using the thin-wall tool, breaks thought limitation of the traditional paving, and solves the problem that the original narrow area of the triangle is difficult to pave and paste. The original narrow area is changed into an open type paving paste, so that the operability of paving paste is greatly enhanced.
Description
Technical Field
The invention belongs to the technical field of manufacturing methods of molding tools, and relates to a thin-wall tool for manufacturing H-shaped variable cross-section honeycomb sandwich structure composite material parts.
Background
The H-shaped variable cross-section honeycomb sandwich structure composite material part is applied to the airplane control surface structure more, as shown in figure 1, the H-shaped variable cross-section honeycomb sandwich structure has the characteristics that the shape is irregular, the honeycomb is embedded in the center of the inside of the H-shaped structure, and the like, and the forming difficulty of the part is higher. For example, chinese patent publication No. CN105172164B discloses a tooling and a manufacturing method for manufacturing a variable cross-section i-shaped composite material part, and particularly relates to a manufacturing method for ensuring the internal and external quality of a composite material variable cross-section i-shaped part in the manufacturing process, which provides the following technical solutions: the tool for manufacturing the variable cross-section I-shaped composite material part is composed of the upper male die, the lower male die and the middle partition plate, by adopting the technical scheme, the overall stability of the tool for vertically combining the upper male die and the lower male die is good, the prepreg blank combination and the pressure transmission are convenient in the manufacturing process, the forming quality is improved, and the forming and the pressurization of a honeycomb area are problematic for the H-shaped variable cross-section honeycomb sandwich structure composite material part.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a thin-wall tool for an H-shaped variable cross-section honeycomb sandwich structure composite material part, and the tool is applied to part forming so as to ensure that a honeycomb area is smooth and flat, the appearance is accurate, and the interior is free of defects.
The technical scheme adopted by the invention is as follows:
the method for manufacturing the thin-wall tool of the H-shaped variable cross-section honeycomb sandwich structure composite material part comprises the following steps:
the first step is as follows: and paving and pasting the cut and molded carbon fiber prepreg on the metal lower male die tool layer by layer to obtain a lower C paving layer.
The second step is that: and (3) paving and pasting the cut and molded carbon fiber prepreg on the left and right metal side plate tools layer by layer to obtain a left and right edge strip paving layer.
The third step: and placing a honeycomb and a glue film on the lower C layer to obtain a sandwich structure.
The fourth step: and paving and pasting the upper C spread layers on the honeycomb core layer by layer, compacting the web plate area, forming an upper C structure by adopting a reverse turnover paving and pasting method, wherein an upper C thin-wall tool is required to be adopted in the process of reverse paving and pasting, and the upper C thin-wall tool and a lower C metal tool are combined and positioned through a metal wedge-shaped positioning block.
Go up C thin wall frock and constitute by carbon fiber thin wall frock, glass fiber thin wall frock.
The manufacturing method of the carbon fiber thin-wall tool comprises the following steps:
a) combining the left and right main bodies of the metal female die tool and the honeycomb station block;
b) paving the cut carbon fiber prepreg on a metal female die tool to meet the thickness requirement;
c) trimming the carbon fiber prepreg according to the position of the honeycomb spacer and the wedge-shaped positioning block;
d) packaging and curing the paved metal female die tool;
the manufacturing method of the glass fiber thin-wall tool comprises the following steps:
a) cutting the glass fiber cloth according to the size of the honeycomb station block;
b) coating epoxy resin and a curing agent with a mass ratio of 100:40 on glass fiber cloth to form a matrix;
c) and paving the base body layer by layer to the joint of the carbon fiber thin-wall tool and the honeycomb.
The invention has the following beneficial effects:
the invention adopts a thin-wall tool, the tool combines the excellent performances of enough rigidity and certain flexibility of the cured carbon fiber, and simultaneously utilizes the advantage of strong plasticity of a glass fiber thin-shell tool to solve the problems of honeycomb area forming and pressurization.
The carbon fiber thin-wall tool can be used for a long time, is light in weight, is beneficial to the operation of paving and demolding processes, is low in cost, needs to be newly manufactured for each piece to ensure the molding quality of a honeycomb region, and is quick, simple and convenient to manufacture.
The invention realizes the reversal, turnover and paving of the prepreg by using the thin-wall tool, breaks thought limitation of the traditional paving, and solves the problem that the original narrow area of the triangle is difficult to pave and paste. The original narrow area is changed into an open type paving paste, so that the operability of paving paste is greatly enhanced.
The H-shaped variable cross-section honeycomb sandwich structure composite material part manufactured by the invention has the advantages of simple and convenient molding operation and excellent quality, solves the problem of nondestructive detection defects of an R angle and a web area in the original process method, has long-term stable product quality, and can be popularized and applied to the composite material parts.
Drawings
FIG. 1 is a schematic structural view of an H-shaped honeycomb rib composite article;
FIG. 2 is a sectional view of a tooling assembly for varying cross-section;
FIG. 3 is a schematic view of a thin-wall tooling;
fig. 4 is a carbon fiber thin-wall tool forming tool.
In the figure: 1, a metal lower male die tool; 2, a left metal side plate tool; 3, a right metal side plate tool; 4, thin-wall tooling; 5, metal positioning blocks; 6, carbon fiber thin-wall tooling; 7, glass fiber thin-wall tooling; 8, a metal female die; 9 cellular bit blocks.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
Example 1:
a frock for making H type variable cross section honeycomb sandwich structure combined material finished piece, as shown in figure 2, the frock main part includes metal lower male die frock 1, left metal side board frock 2, right metal side board frock 3, goes up C thin wall frock 4 and metal locating piece 5
As shown in fig. 3, the carbon fiber thin-wall tool 6 and the glass fiber thin-wall tool 7 form an upper C thin-wall tool 4. And the upper C thin-wall tool 4 is combined through a metal positioning block 5 on the metal lower male die tool 1.
Example 2:
a manufacturing method of an upper C thin-wall tool 4 is used for manufacturing the upper C thin-wall tool 4 shown in figure 3, and the part of the upper C thin-wall tool 4 consists of a carbon fiber thin-wall tool 6 and a glass fiber thin-wall tool 7.
In the process of manufacturing the carbon fiber thin-wall tool 6, the carbon fiber thin-wall tool 6 is paved and adhered in the metal female die 8, the carbon fiber fabric at the position of the honeycomb occupying block 9 is removed in the paving and adhering process, and the carbon fiber at the position of the metal positioning block 5 needs to be removed in the paving and adhering process so as to be used for subsequent combined positioning.
And forming a glass fiber thin-wall tool 7 after combination according to the combination of the carbon fiber thin-wall tool 6 and the paved workpiece.
The glass fiber thin-wall tool 7 is formed by coating epoxy resin and a curing agent with the mass ratio of 100:40 on glass fiber cloth, paving and pasting the glass fiber thin-wall tool 7 on an exposed area of a carbon fiber thin-wall tool 6 matched with a workpiece layer by layer until the thickness of the glass fiber thin-wall tool 7 is 2mm, and curing a vacuum bag. In the curing process, the glass fiber thin-wall tool 7 and the carbon fiber thin-wall tool 6 form an integral connection mode.
The whole manufacturing sequence is as follows: manufacturing a carbon fiber thin-wall tool 6, paving and pasting a lower C part of a workpiece on a metal lower male die tool 1, paving and pasting a left edge strip and a right edge strip, combining the left edge strip, the right edge strip, a left metal side plate tool and a right metal side plate tool, paving and pasting a glue film layer and a honeycomb, paving and pasting a C prepreg, and combining the carbon fiber thin-wall tool 6 by utilizing a metal positioning block 5 to manufacture a glass fiber thin-wall tool 7.
Carrying out vacuum bag packaging on the assembly, and curing the assembly in an autoclave at the curing temperature of 180 +/-5 ℃ under the curing pressure of 0.3-0.4MPa in a vacuum process;
demoulding and subsequent detection are carried out on the cooled workpiece;
and cleaning a metal tool and a carbon fiber thin-wall tool 6.
Claims (2)
1. The method for manufacturing the thin-wall tool for the H-shaped variable cross-section honeycomb sandwich structure composite material part is characterized by comprising the following steps of:
the first step is as follows: paving and pasting the cut and molded carbon fiber prepreg on a metal lower male die tool (1) layer by layer to obtain a lower C paving layer;
the second step is that: laying and pasting the cut and molded carbon fiber prepreg on a left metal side plate tool and a right metal side plate tool layer by layer to obtain a left and right edge strip laying layer;
the third step: placing a honeycomb and a glue film on the lower C layer to obtain a sandwich structure;
the fourth step: paving and pasting the upper C spread layer on the honeycomb core layer by layer, compacting the web plate area, forming an upper C structure by adopting a reverse turnover paving and pasting method, adopting an upper C thin-wall tool in the process of reverse paving and pasting, and positioning the upper C thin-wall tool and a lower C metal tool through a metal wedge-shaped positioning block in a combined mode;
the upper C thin-wall tool (4) consists of a carbon fiber thin-wall tool (6) and a glass fiber thin-wall tool (7);
the manufacturing method of the carbon fiber thin-wall tool (6) comprises the following steps:
a) a left main body, a right main body and a honeycomb station block of a combined metal female die (8) tool;
b) laying and sticking the cut carbon fiber prepreg on a metal female die (8) tool to meet the thickness requirement;
c) trimming the carbon fiber prepreg according to the position of the honeycomb spacer and the wedge-shaped positioning block;
d) and packaging and curing the paved metal female die (8) tool.
2. The method for manufacturing the thin-wall tool for the H-shaped variable cross-section honeycomb sandwich structure composite material part according to claim 1, wherein the method for manufacturing the glass fiber thin-wall tool (7) comprises the following steps:
a) cutting the glass fiber cloth according to the size of the honeycomb station block;
b) coating epoxy resin and a curing agent with a mass ratio of 100:40 on glass fiber cloth to form a matrix;
c) and paving the base body layer by layer to the joint of the carbon fiber thin-wall tool (6) and the honeycomb.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210712188.7A CN115042453B (en) | 2022-06-22 | 2022-06-22 | Thin-wall tool for manufacturing H-shaped variable-section honeycomb sandwich structure composite material part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210712188.7A CN115042453B (en) | 2022-06-22 | 2022-06-22 | Thin-wall tool for manufacturing H-shaped variable-section honeycomb sandwich structure composite material part |
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| Publication Number | Publication Date |
|---|---|
| CN115042453A true CN115042453A (en) | 2022-09-13 |
| CN115042453B CN115042453B (en) | 2024-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210712188.7A Active CN115042453B (en) | 2022-06-22 | 2022-06-22 | Thin-wall tool for manufacturing H-shaped variable-section honeycomb sandwich structure composite material part |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116787807A (en) * | 2023-07-28 | 2023-09-22 | 沈阳飞机工业（集团）有限公司 | No-margin manufacturing method of composite long truss parts |
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| CN115042453B (en) | 2024-03-08 |
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