CN115042453B - Thin-wall tool for manufacturing H-shaped variable-section honeycomb sandwich structure composite material part - Google Patents
Thin-wall tool for manufacturing H-shaped variable-section honeycomb sandwich structure composite material part Download PDFInfo
- Publication number
- CN115042453B CN115042453B CN202210712188.7A CN202210712188A CN115042453B CN 115042453 B CN115042453 B CN 115042453B CN 202210712188 A CN202210712188 A CN 202210712188A CN 115042453 B CN115042453 B CN 115042453B
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- Prior art keywords
- thin
- tool
- wall
- carbon fiber
- layer
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 239000002131 composite material Substances 0.000 title claims abstract description 14
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 34
- 239000004917 carbon fiber Substances 0.000 claims abstract description 34
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000003365 glass fiber Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims description 34
- 238000003892 spreading Methods 0.000 claims description 8
- 239000004744 fabric Substances 0.000 claims description 7
- 230000001680 brushing effect Effects 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 239000002313 adhesive film Substances 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000004806 packaging method and process Methods 0.000 claims description 2
- 238000009966 trimming Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 238000009461 vacuum packaging Methods 0.000 description 1
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)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
Abstract
The invention belongs to the technical field of manufacturing methods of forming tools, and relates to a thin-wall tool for manufacturing an H-shaped variable-section honeycomb sandwich structure composite material part. According to the invention, the thin-wall tooling is adopted, the tooling combines the excellent performances of enough rigidity and certain flexibility of the cured carbon fiber, and meanwhile, the problems of honeycomb area forming and pressurization are solved by utilizing the advantage of strong plasticity of the glass fiber thin-shell tooling. The carbon fiber thin-wall tooling 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 ensuring the molding quality of honeycomb areas, and is rapid and simple to manufacture. The invention utilizes the thin-wall tooling to realize the reverse folding and pasting of the prepreg, breaks through the thinking limit of the traditional pasting and solves the problem that the pasting is difficult in the narrow area of the original triangle. The original narrow area is changed into an open type paving, so that the operability of the paving is greatly enhanced.
Description
Technical Field
The invention belongs to the technical field of manufacturing methods of forming tools, and relates to a thin-wall tool for manufacturing an H-shaped variable-section honeycomb sandwich structure composite material part.
Background
The H-shaped honeycomb sandwich structure composite material part is more applied to the aircraft control surface structure, and as shown in fig. 1, the H-shaped honeycomb sandwich structure has the characteristics of irregular appearance, honeycomb embedded in the center of the H-shaped structure and the like, and the forming difficulty of the part is high. The invention discloses a tool and a manufacturing method for manufacturing a variable cross-section type I-shaped composite material part, in particular to a manufacturing method for ensuring the internal and external quality of the composite material variable cross-section type I-shaped part in the manufacturing process, and the invention provides the following technical scheme: by last positive mould, lower positive mould, middle baffle constitute a frock that is used for making variable cross section class I type combined material finished piece, adopt above-mentioned technical scheme, vertical combination positive mould frock overall stability is good from top to bottom, is convenient for prepreg combination and pressure transmission in the manufacturing process, improves shaping quality, but to H type variable cross section honeycomb sandwich structure combined material finished piece, has the problem to honeycomb region shaping and pressurization.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a thin-wall tool for an H-shaped variable-section honeycomb sandwich structure composite material part, which is applied to part molding so as to ensure that a honeycomb area is smooth and flat, the appearance is accurate and the inside is free from defects.
The technical scheme adopted by the invention is as follows:
the method for manufacturing the thin-wall tooling of the H-shaped variable-section honeycomb sandwich structure composite material part comprises the following steps of:
the first step: and paving the cut and formed carbon fiber prepreg layer by layer on a metal lower male die tooling to obtain a lower C-shaped paving layer.
And a second step of: and paving the cut carbon fiber prepreg layer by layer on the left and right metal side plate tools to obtain left and right edge strip paving layers.
And a third step of: and placing a honeycomb and an adhesive film on the lower C layer to obtain the sandwich structure.
Fourth step: spreading the upper C spreading layer by layer on the honeycomb core, compacting the web area, forming an upper C structure by adopting a reverse folding spreading method, and combining and positioning the upper C thin-wall tool and the lower C metal tool through metal wedge-shaped positioning blocks in the reverse spreading process.
The upper C thin-wall tool consists of a carbon fiber thin-wall tool and a glass fiber thin-wall tool.
The manufacturing method of the carbon fiber thin-wall tool comprises the following steps:
a) The left main body and the right main body of the combined metal female die tool and the honeycomb space occupying block;
b) Paving the cut carbon fiber prepreg on a metal female die tooling to meet the thickness requirement;
c) Trimming the carbon fiber prepreg according to the position of the honeycomb occupying block and the metal wedge-shaped positioning block;
d) Packaging and solidifying the laid metal female die tooling;
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 occupying block;
b) Brushing epoxy resin and a curing agent with the mass ratio of 100:40 onto glass fiber cloth to form a matrix;
c) And paving the matrix layer by layer at the joint of the carbon fiber thin-wall tool and the honeycomb.
The invention has the beneficial effects that:
according to the invention, the thin-wall tooling is adopted, the tooling combines the excellent performances of enough rigidity and certain flexibility of the cured carbon fiber, and meanwhile, the problems of honeycomb area forming and pressurization are solved by utilizing the advantage of strong plasticity of the glass fiber thin-shell tooling.
The carbon fiber thin-wall tooling 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 ensuring the molding quality of honeycomb areas, and is rapid and simple to manufacture.
The invention utilizes the thin-wall tooling to realize the reverse folding and pasting of the prepreg, breaks through the thinking limit of the traditional pasting and solves the problem that the pasting is difficult in the narrow area of the original triangle. The original narrow area is changed into an open type paving, so that the operability of the paving is greatly enhanced.
The H-shaped variable cross-section honeycomb sandwich structure composite material manufactured by the method is simple and convenient in molding operation and excellent in quality, solves the problem of nondestructive testing defects of an R angle and a web area of the original process method, is stable in product quality for a long time, and can be popularized and applied to the composite material.
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 variable cross-section;
FIG. 3 is a schematic diagram of a thin-wall tooling;
fig. 4 is a carbon fiber thin-wall tooling forming tooling.
In the figure: 1, a metal lower male die tool; 2 left metal side plate tooling; 3, right metal side plate tooling; 4, thin-wall tooling; 5, a metal wedge-shaped positioning block; 6 carbon fiber thin-wall tooling; 7, glass fiber thin-wall tooling; 8, a metal female die; 9 cell occupancy blocks.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
Example 1:
a frock for making H type variable cross section honeycomb sandwich structure combined material finished piece, as shown in fig. 2, the frock main part includes under the metal male mould frock 1, left metal curb plate frock 2, right metal curb plate frock 3, go up C thin wall frock 4 and metal wedge locating piece 5
As shown in fig. 3, the carbon fiber thin-wall tooling 6 and the glass fiber thin-wall tooling 7 form the upper C thin-wall tooling 4. The upper C thin-wall tooling 4 is combined through a metal wedge-shaped positioning block 5 on the metal lower male die tooling 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 fig. 3, and 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 tooling 6, the carbon fiber thin-wall tooling 6 is paved in the metal female die 8, the carbon fiber fabric at the position of the honeycomb occupying block 9 is cumulatively paved to 2mm, and the carbon fiber at the position of the metal wedge-shaped positioning block 5 is removed in the paving process for subsequent combined positioning.
And combining the carbon fiber thin-wall tool 6 with the paved workpiece, and forming a glass fiber thin-wall tool 7 after combination.
The glass fiber thin-wall tooling 7 is formed by brushing epoxy resin and curing agent with the mass ratio of 100:40 onto glass fiber cloth, paving the exposed area of the carbon fiber thin-wall tooling 6 matched with a workpiece layer by layer to be 2mm thick, and curing by 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 a lower C part of a workpiece on the metal lower male die tool 1, paving left and right edge strips, combining the left and right edge strips with left and right metal side plate tools, paving a glue film layer and a honeycomb, paving a C prepreg, combining the carbon fiber thin-wall tool 6 by using a metal wedge-shaped positioning block 5, and manufacturing a glass fiber thin-wall tool 7.
Vacuum packaging the above combination, curing in autoclave at 180+ -5deg.C under 0.3-0.4MPa, and vacuum;
demoulding and subsequent detection are carried out on the cooled workpiece;
and cleaning the metal tool and the carbon fiber thin-wall tool 6.
Claims (2)
1. A method for manufacturing an H-shaped variable cross-section honeycomb sandwich structure composite material workpiece by means of a thin-wall tool is characterized by comprising the following steps:
the first step: paving the cut carbon fiber prepreg layer by layer on a metal lower male die tool (1) to obtain a lower C-shaped paving layer;
and a second step of: paving the cut carbon fiber prepreg layer by layer on a left metal side plate tool and a right metal side plate tool to obtain left and right edge strip paving layers;
and a third step of: placing honeycomb and adhesive film on the lower C layer to obtain a sandwich structure;
fourth step: spreading the upper C spreading layer by layer on the honeycomb core, compacting the web area, forming an upper C structure by adopting a reverse folding spreading method, and combining and positioning the upper C thin-wall tool and the lower C metal tool through a metal wedge-shaped positioning block in the reverse spreading process;
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) Assembling left and right main bodies and honeycomb space occupying blocks of a metal female die (8) tool;
b) Paving 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 occupying block and the metal wedge-shaped positioning block;
d) Packaging and solidifying the laid metal female die (8) tool;
the glass fiber thin-wall tool (7) is formed by brushing epoxy resin and curing agent with the mass ratio of 100:40 onto glass fiber cloth, paving the exposed area of the carbon fiber thin-wall tool (6) matched with a workpiece layer by layer to be 2mm thick, and curing by 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.
2. A method for manufacturing an H-section honeycomb sandwich structure composite material product by means of a thin-wall tooling according to claim 1, characterized in that the glass fiber thin-wall tooling (7) is manufactured by the following steps:
a) Cutting the glass fiber cloth according to the size of the honeycomb occupying block;
b) Brushing epoxy resin and a curing agent with the mass ratio of 100:40 onto glass fiber cloth to form a matrix;
c) And paving the matrix 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115042453A CN115042453A (en) | 2022-09-13 |
| CN115042453B true 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 |
Country Status (1)
| Country | Link |
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| CN (1) | CN115042453B (en) |
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| CN115042453A (en) | 2022-09-13 |
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