CN114379110B - Split-mold paving self-adaptive soft mold forming method for super-thickness variable-curvature composite material part - Google Patents
Split-mold paving self-adaptive soft mold forming method for super-thickness variable-curvature composite material part Download PDFInfo
- Publication number
- CN114379110B CN114379110B CN202111509706.7A CN202111509706A CN114379110B CN 114379110 B CN114379110 B CN 114379110B CN 202111509706 A CN202111509706 A CN 202111509706A CN 114379110 B CN114379110 B CN 114379110B
- Authority
- CN
- China
- Prior art keywords
- layer
- curvature
- super
- sub
- self
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 92
- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000007731 hot pressing Methods 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000004744 fabric Substances 0.000 claims description 33
- 229920000728 polyester Polymers 0.000 claims description 33
- 238000013329 compounding Methods 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims 1
- 239000000835 fiber Substances 0.000 abstract description 6
- 238000007711 solidification Methods 0.000 abstract description 3
- 230000008023 solidification Effects 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 125
- 238000010586 diagram Methods 0.000 description 6
- 230000003044 adaptive effect Effects 0.000 description 4
- 238000005056 compaction Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009830 intercalation Methods 0.000 description 2
- 230000002687 intercalation Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000037303 wrinkles Effects 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
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
-
- 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
- B29C70/543—Fixing the position or configuration of fibrous reinforcements before or during moulding
-
- 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
- B29L2007/00—Flat articles, e.g. films or sheets
- B29L2007/002—Panels; Plates; Sheets
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a split-die paving self-adaptive soft die forming method of an ultra-thickness variable-curvature composite product, which comprises the steps of dividing the ultra-thickness variable-curvature composite product into a plurality of sub-layers, performing split-die paving hot-pressing preforming, sequentially combining the sub-layers on an ultra-thickness variable-curvature composite product forming die, performing hot-pressing again, and then covering the self-adaptive soft die on the sub-layer on the uppermost layer, and performing curing forming; the self-adaptive soft mold is a composite material soft mold designed according to the thickness change condition and the curvature change condition of the super-thickness variable-curvature composite material workpiece, can be completely matched with the super-thickness variable-curvature composite material workpiece in a region with severe thickness change or large curvature change, can uniformly conduct pressure, ensures the internal quality and size of a product, prevents complicated layer loss or material sheet slippage between the layers, ensures the fiber trend to be smooth and wrinkle-free, effectively solves a plurality of problems existing in layered hot press solidification of the super-thickness variable-curvature composite material workpiece, and has excellent application and popularization values.
Description
Technical Field
The invention relates to a split-die paving self-adaptive soft die forming method for an ultra-thickness variable-curvature composite material part.
Background
The super-thick variable-curvature composite material part refers to a carbon fiber composite material part with large thickness and large curvature change. Because the thickness difference is large, when the accumulated layering hot-press molding is adopted, the times of heat circulation of each layer of prepreg are inconsistent, and heat loss is brought by layering and multi-time tank feeding hot-press, so that the appearance quality of parts and the like are affected. At present, aiming at the problem, the effective measure is to carry out layered hot pressing, namely dividing a large-thickness ultra-complex curved surface workpiece into a plurality of sub-layers, adopting the same data source to manufacture a uniform pressing plate of the adjacent sub-layers and a parting surface of a paving tool, respectively carrying out hot pressing molding after paving, and sequentially combining the sub-layers of the hot pressing molding.
However, the layered hot pressing effectively solves the problem that heat loss is caused by multi-time tank feeding hot pressing of layering and the final mechanical property of the workpiece is affected by multi-time circulating hot pressing of accumulated layering. However, because the thickness of the composite material product with the over-thickness and variable curvature is larger, the number of sub-layers divided into the composite material product is larger, and the composite material product is sequentially combined and then solidified, and because the solidifying temperature is higher, the problem that the sub-layers at the bottom layer and the top layer slide relatively still exists, and the defects that the buckling, the wrinkling and the like of fibers are difficult to control are also existed. And secondly, when the sub-layers are combined and cured, the problem that gas among the layers is difficult to exhaust, internal defects such as pores and layering can occur after the part is cured, and the nondestructive quality is difficult to ensure still exists. Again, when combined post-cure, there is also a long time for the prepreg of the intermediate layer to reach the desired process temperature, and a short time for the surface layer to reach the desired process temperature after layup, resulting in a long thermal history time for layup of the surface layer, leading to a problem of product out of compliance with process specification requirements. In addition, the product of the super-thick variable-curvature composite material is required to meet the appearance and appearance requirements of the product through a lost layer design, however, the design of layered hot pressing aiming at the sub-layering is difficult to be compatible with the lost layer design, particularly, the product with complex appearance structure and severe change of the profile curvature of the product is complex in lost layer design, a plurality of intercalation layers can exist, and the lost layer or the intercalation layers can easily slide during hot pressing solidification after combination, so that the product quality requirements are difficult to be met.
Disclosure of Invention
Aiming at the problems, the invention provides a method for forming the super-thickness variable-curvature composite part by parting, paving and pasting the self-adaptive soft mold, wherein the super-thickness variable-curvature composite part is subjected to parting, layering and hot pressing by designing the self-adaptive soft mold to match, so that the period of the prepreg paving process of the part is short, the thickness is controllable, and the buckling and the folding of the fiber are controllable; the purposes of qualified product molded surface and internal quality, smooth and flat appearance and uniform thermal calendar process of each layer are achieved. The specific technical scheme is as follows:
the forming method is that after the super-thickness variable-curvature composite part is divided into a plurality of sub-layers, the sub-layers are subjected to split-die paving and hot pressing preforming, the sub-layers are sequentially combined on a super-thickness variable-curvature composite part forming die for hot pressing again, and then the self-adaptive soft die is covered on the sub-layer of the uppermost layer, and then the sub-layers are cured and formed; the self-adaptive soft mold is a composite material soft mold which is designed according to the thickness change condition and the curvature change condition of the super-thickness variable-curvature composite material piece and can be completely matched with the super-thickness variable-curvature composite material piece in a region with severe thickness change or large curvature change.
The method for forming the super-thick variable-curvature composite material part by split-die paving and pasting self-adaptive soft die is characterized in that the self-adaptive soft die is formed by compounding rubber materials and polyester cloth, and particularly is formed by compounding two layers of rubber materials with a plurality of layers of polyester cloth.
According to the method for forming the super-thick variable-curvature composite material part by split-die paving and self-adaptive soft-die forming, the number of layers of the polyester cloth is determined according to the thickness change condition and the curvature change condition of the super-thick variable-curvature composite material part, and the layer loss design is carried out in the area with severe thickness change or large curvature change.
Preferably, according to the method for forming the super-thick variable-curvature composite part by split-die paving and self-adaptive soft-die forming, the polyester cloth is subjected to layer loss design in the region with severe thickness change or large curvature change, and 1-4 layers of polyester cloth are reduced in the region with severe thickness change or large curvature change of the super-thick variable-curvature composite part.
The method for forming the super-thick variable-curvature composite part by split-die paving and self-adaptive soft die comprises the following steps of:
1) Preparing a soft mold forming tool: preparing a self-adaptive soft mold forming tool for self-adaptive soft mold forming according to the upper molded surface of the super-thick variable-curvature composite material part;
2) Layer loss design: determining the number of layers of polyester cloth used by the self-adaptive soft mold according to the thickness of the super-thickness variable-curvature composite material piece, and determining the position of a layer loss area, the number of layers of laid polyester cloth and the length according to the variable curvature of the super-thickness variable-curvature composite material piece;
3) Layering control: paving a layer of rubber material on the self-adaptive soft mold forming tool, paving polyester cloth layer by layer according to requirements, controlling the paving number and paving position of the polyester cloth in a layer loss area through laser projection according to the result of layer loss design, and covering a layer of rubber material after the polyester cloth is paved;
4) Soft mould solidifying and shaping: and packaging the self-adaptive soft mold after the paving, and performing hot press curing to obtain a self-adaptive soft mold finished product.
According to the method for forming the super-thick variable-curvature composite part by the split-die paving self-adaptive soft die, the super-thick variable-curvature composite part is divided into a plurality of sub-layers to be subjected to split-die paving hot-pressing preforming, and the end head and the baffle on one side of each sub-layer split-die tool are detachable and are used for ensuring smooth demolding after the sub-layers are preformed.
Preferably, in the method for forming the super-thick variable-curvature composite part by split-die paving and self-adaptive soft die, the super-thick variable-curvature composite part forming die is a split-die tooling of a sub-paving layer at the bottom layer; and the mold separating tool is provided with a detachable total end and a total baffle for molding the whole super-thickness variable-curvature composite part.
Preferably, in the above method for forming the super-thick variable-curvature composite part by split-die paving and self-adaptive soft-die forming, after the thermal compression preforming of the bottommost sub-layer, demolding is not needed, only the end head and the baffle of the bottommost sub-layer split-die tooling are required to be disassembled, then the rest sub-layers are sequentially combined on the bottommost sub-layer, and then the total end head and the total baffle are assembled and are subjected to thermal compression again.
According to the method for forming the super-thick variable-curvature composite part by split-die paving and self-adaptive soft die, the auxiliary positioning is carried out by adopting the laser projector when all the sub-layers are sequentially combined in sequence: when each sub-layer is combined, the laser projection of the sub-layer to be combined is projected on a paving tool or the sub-layer which is combined at the bottom, and the boundary with obvious surface characteristics of the sub-layer to be combined is selected to be positioned and matched with the corresponding laser projection boundary.
According to the method for forming the super-thick variable-curvature composite part by split-die paving and self-adaptive soft die, all sub-layers and the self-adaptive soft die are packaged on the super-thick variable-curvature composite part forming die, and the super-thick variable-curvature composite part forming die is sent into an autoclave for curing, wherein parameters of curing and forming are as follows: the temperature is 180+/-6 ℃, the curing pressure is 0.55-0.65 Mpa, and the heat preservation time is 150-220 min.
The invention has the beneficial effects that:
the forming method adopts the self-adaptive soft die to divide the super-thickness variable-curvature composite material part into a plurality of sub-layers, pre-forms, combines the sub-layers with heat compaction again, and then cures, and adopts the self-adaptive soft die in the curing process to automatically adapt to the appearance of the product, uniformly conduct pressure, ensure the internal quality and size of the product, prevent complex layer loss or material sheet slippage between the inserting layers, ensure the fiber trend to be smooth and wrinkle-free, and effectively solve a plurality of problems existing in layered heat pressing curing of the super-thickness variable-curvature composite material part.
The self-adaptive soft mold adopted by the forming method is formed by compounding the rubber material and the polyester cloth, and the purpose of uniformly pressurizing the ultra-thickness variable-curvature composite material part in the curing process is achieved while the smoothness and flatness of the surface of the product are ensured.
The forming method provided by the invention carries out layer loss design on the polyester cloth reinforcing layer of the self-adaptive soft mold, so that the self-adaptive matching performance of the self-adaptive soft mold on the appearance of the super-thickness variable-curvature composite material product in the curing process is ensured.
When the forming method is used for preparing the self-adaptive soft mold layer control and combining all preformed sub-layers, laser projection auxiliary positioning is adopted, and the accuracy of paving and combining is ensured.
According to the forming method, the end head of the forming tool die of each sub-layer and the baffle plate on one side are designed to be detachable, so that the preformed sub-layers are ensured to be smoothly demoulded; and after the bottom-layer sub-layer is preformed by hot pressing, demolding is not needed, and after only the end head for forming the bottom-layer sub-layer and a baffle plate on one side are disassembled, the rest sub-layers are sequentially combined on the bottom-layer sub-layer, and after the total end head and the side baffle plates are assembled, the thermal compaction is performed again, so that the combination steps and the number of dies are saved, and the combination precision of each preformed sub-layer can be better ensured.
In general, the forming method solves a plurality of problems existing in the hot press curing process of the super-thickness variable-curvature composite product due to large thickness and large curvature change, achieves the aim of ensuring the quality of the product from inside to outside, and has excellent application and popularization values.
Drawings
FIG. 1 is a schematic diagram of a split-die paving self-adaptive soft die forming assembly of an ultra-thick variable-curvature composite part;
FIG. 2 is a schematic diagram of adaptive soft mode matching according to the present invention;
FIG. 3 is a schematic diagram of an adaptive soft mold structure according to the present invention;
FIG. 4 is a schematic diagram of an adaptive soft mode layer loss region according to the present invention;
FIG. 5 is a schematic diagram of a parting tool according to the present invention;
FIG. 6 is a schematic diagram of a forming die for a composite material with variable thickness and curvature according to the present invention.
In the figure: 1. an ultra-thick variable-curvature replica; 11. sub-layering; 2. a forming die for the thickness variable curvature replica; 21. a main end; 22. a total baffle; 3. self-adaptive soft mold; 31. a rubber material; 32. a polyester cloth; 4. self-adaptive soft mold forming tool; 5. layer loss areas; 6. separating a die tool; 61. an end head; 62. and a baffle.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments and the accompanying drawings, and it is obvious that the described embodiments are only preferred embodiments of the present invention, not all embodiments, nor other forms of limitation of the present invention, and any person skilled in the art may make changes or modifications and equivalent variations using the disclosed technical matters. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present invention still fall within the protection scope of the technical solution of the present invention.
Examples:
the embodiment is a method for forming an ultra-thickness variable-curvature composite part by dividing, paving and pasting a self-adaptive soft mold, wherein the method comprises the steps of dividing the ultra-thickness variable-curvature composite part 1 into a plurality of sub-layers 11, performing split-mold paving, pasting and hot-pressing preforming, sequentially combining the sub-layers on an ultra-thickness variable-curvature composite part forming mold 2, performing hot-pressing again, and then covering the self-adaptive soft mold 3 on the uppermost sub-layer 11, and performing curing forming; the self-adaptive soft mold 3 is a composite material soft mold designed according to the thickness change condition and the curvature change condition of the super-thickness variable-curvature composite material part 1 and capable of being completely matched with the super-thickness variable-curvature composite material part 1 in a region with severe thickness change or large curvature change, can uniformly conduct pressure, ensures the internal quality and size of a product, prevents complicated layer loss or material sheet slippage between the inserting layers, ensures the fiber trend to be smooth and wrinkle-free, and effectively solves a plurality of problems existing in layered hot press solidification of the super-thickness variable-curvature composite material part.
The method for forming the super-thick variable-curvature composite part by split-die paving and pasting self-adaptive soft die 3 is formed by compounding rubber materials 31 and polyester cloth 32, and specifically is formed by compounding two layers of rubber materials 31 with a plurality of layers of polyester cloth 32 sandwiched therebetween. The number of layers of the polyester cloth 32 is determined according to the thickness variation condition and the curvature variation condition of the super-thickness variable-curvature composite part 1, and a layer loss design is performed in a region with severe thickness variation or large curvature variation, for example, 1-4 layers of polyester cloth 32 are reduced in the region with severe thickness variation or large curvature variation of the super-thickness variable-curvature composite part 1, so that the super-thickness variable-curvature composite part can be completely attached to the part, and meanwhile, the smoothness and flatness of the surface of a product are ensured.
In this embodiment, the method for preparing the adaptive soft mold 3 includes the following steps:
1) Preparing a soft mold forming tool: preparing a self-adaptive soft mold forming tool 4 for forming the self-adaptive soft mold 3 according to the upper molded surface of the super-thick variable-curvature composite part 1;
2) Layer loss design: the number of layers of the polyester cloth 32 used by the self-adaptive soft mold 3 is determined according to the thickness of the super-thickness variable-curvature composite part 1, and the position of the layer loss area 5, the number of layers of the laid polyester cloth 32 and the length are determined according to the variable curvature of the super-thickness variable-curvature composite part 1;
3) Layering control: paving a layer of rubber material 31 on the self-adaptive soft mold forming tool 4, paving polyester cloth 32 layer by layer according to requirements, controlling the paving number and paving position of the polyester cloth 32 in the layer loss area 5 through laser projection according to the result of layer loss design, and covering a layer of rubber material 31 after the polyester cloth 32 is paved;
4) Soft mould solidifying and shaping: and packaging the self-adaptive soft mold 3 after the paving and the forming tool thereof, and then carrying out hot press curing to obtain a finished product of the self-adaptive soft mold 3.
In this embodiment, in order to ensure smooth demolding after the preforming of each sub-layer 11, the super-thickness variable-curvature composite part 1 is divided into a plurality of sub-layers 11 for mold separation, spreading and hot pressing preforming, and the end 61 of the mold separation tool 6 of each sub-layer 11 and the baffle 62 on one side are detachable. The parting tool 6 of the sub-layering 11 at the lowest layer can be used as an ultra-thickness variable-curvature composite part forming die 2 at the same time, and is provided with a detachable total end head 21 and a detachable total baffle 21 which correspond to the end head 61 and the baffle 62 of the parting tool 6 and are used for forming the whole ultra-thickness variable-curvature composite part 1. After the bottom-layer sub-layer 11 is preformed by hot pressing, demolding is not needed, only the end head 61 and the baffle plate 62 of the mold separating tool 6 of the bottom-layer sub-layer 11 are required to be disassembled, then the rest sub-layers 11 are sequentially combined on the bottom-layer sub-layer 11, the total end head 21 and the total baffle plate 21 are assembled and hot pressed again, the combination steps and the number of molds are saved, and the combination precision of all preformed sub-layers can be better ensured.
In order to ensure the combination precision of the sub-mats 11, the embodiment adopts a laser projector to perform auxiliary positioning, when each sub-mat 11 is sequentially combined, each time one sub-mat 11 is combined, the laser projection of the sub-mat 11 to be combined is projected on a paving tool or the sub-mat 11 which is combined in the lower part, and the boundary with obvious surface characteristics of the sub-mat 11 to be combined is selected to perform positioning matching combination with the corresponding laser projection boundary.
According to the method for forming the super-thick variable-curvature composite part by split-die paving and self-adaptive soft die, all sub-layers 11 and the self-adaptive soft die 3 are packaged on the super-thick variable-curvature composite part forming die 2 and then sent into an autoclave for curing, and parameters of curing and forming are as follows: the temperature is 180+/-6 ℃, the curing pressure is 0.55-0.65 Mpa, and the heat preservation time is 150-220 min.
The forming method provided by the invention adopts the self-adaptive soft mold to divide the super-thickness variable-curvature composite material part into a plurality of sub-layers, performs the pre-forming, combines the pre-forming with the hot compacting, and then cures, and adopts the self-adaptive soft mold in the curing process to automatically adapt to the appearance of the product, uniformly conduct pressure, ensure the internal quality and size of the product, prevent the complex layer loss or the slippage of a material sheet between the inserting layers, ensure the smooth fiber trend without wrinkles, effectively solve a plurality of problems existing in the layered hot pressing curing of the super-thickness variable-curvature composite material part, and simultaneously ensure the smoothness and flatness of the surface of the product. According to the method, the polyester cloth reinforcing layer of the self-adaptive soft mold is subjected to layer loss design, so that the self-adaptive soft mold is guaranteed to self-adaptively match the appearance of the super-thickness variable-curvature composite material product in the curing process, and the laser projection auxiliary positioning is adopted when the self-adaptive soft mold is prepared for layer spreading control and each preformed sub-layer is combined, so that the accuracy of paving and combining is guaranteed. In addition, the end head of the forming tool die and the baffle plate on one side of each sub-layer are designed to be detachable, so that the preformed sub-layers are ensured to be smoothly demoulded; and after the bottom-layer sub-layer is preformed by hot pressing, demolding is not needed, and after only the end head for forming the bottom-layer sub-layer and a baffle plate on one side are disassembled, the rest sub-layers are sequentially combined on the bottom-layer sub-layer, and after the total end head and the side baffle plates are assembled, the thermal compaction is performed again, so that the combination steps and the number of dies are saved, and the combination precision of each preformed sub-layer can be better ensured. In general, the forming method solves a plurality of problems existing in the hot press curing process of the super-thickness variable-curvature composite product due to large thickness and large curvature change, achieves the aim of ensuring the quality of the product from inside to outside, and has excellent application and popularization values.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail herein, but rather is provided for the purpose of enabling those skilled in the art to make and use the embodiments described herein.
Claims (6)
1. A method for forming an ultra-thick variable-curvature composite part by separating, paving and pasting a self-adaptive soft mold is characterized by comprising the following steps of:
dividing the super-thickness variable-curvature composite part (1) into a plurality of sub-layers (11), performing split-die paving and hot pressing preforming, sequentially combining the sub-layers on the super-thickness variable-curvature composite part forming die (2), performing hot pressing again, and then covering the self-adaptive soft die (3) on the sub-layer (11) on the uppermost layer, and performing curing forming;
the self-adaptive soft mold (3) is a composite material soft mold which is designed according to the thickness change condition and the curvature change condition of the super-thickness variable-curvature composite material piece (1) and can be completely matched with the super-thickness variable-curvature composite material piece (1) in a region with severe thickness change or large curvature change;
the self-adaptive soft mold (3) is formed by compounding a rubber material (31) and polyester cloth (32), and is particularly formed by compounding two layers of rubber materials (31) with a plurality of layers of polyester cloth (32) sandwiched therebetween;
the layer number of the polyester cloth (32) is determined according to the thickness change condition and the curvature change condition of the super-thickness variable-curvature composite material (1), and the layer loss design is carried out in the area with severe thickness change or large curvature change;
specifically, the polyester cloth (32) is subjected to layer loss design in the region with severe thickness change or large curvature change, namely 1-4 layers of polyester cloth (32) are paved in the region with severe thickness change or large curvature change of the super-thickness variable-curvature composite part (1);
the preparation method of the self-adaptive soft mold (3) comprises the following steps:
1) Preparing a soft mold forming tool: preparing a self-adaptive soft mold forming tool (4) for forming a self-adaptive soft mold (3) according to the upper molded surface of the super-thickness variable-curvature composite material part (1);
2) Layer loss design: the number of layers of polyester cloth (32) used by the self-adaptive soft mold (3) is determined according to the thickness of the super-thickness variable-curvature composite material (1), and the position of a layer loss area (5), the number of layers of the laid polyester cloth (32) and the length are determined according to the variable curvature of the super-thickness variable-curvature composite material (1);
3) Layering control: paving a layer of rubber material (31) on the self-adaptive soft mold forming tool (4), paving polyester cloth (32) layer by layer according to requirements, controlling the paving number and paving position of the polyester cloth (32) in a layer loss area (5) through laser projection according to the result of layer loss design, and covering a layer of rubber material (31) after the polyester cloth (32) is paved;
4) Soft mould solidifying and shaping: and packaging the self-adaptive soft mold (3) after the paving, and performing hot press curing to obtain a finished product of the self-adaptive soft mold (3).
2. The method for the split-die paving self-adaptive soft die forming of the super-thick variable-curvature composite part, which is characterized by comprising the following steps of: the super-thick variable-curvature composite material part (1) is divided into a plurality of sub-layers (11) for split-die paving and hot-pressing preforming, and the end head (61) of each sub-layer (11) split-die tool (6) and a baffle (62) on one side are detachable and are used for guaranteeing smooth demolding after the sub-layers (11) are preformed.
3. The method for forming the super-thick variable-curvature composite part by split-die paving and self-adapting soft die according to claim 2, which is characterized by comprising the following steps: the forming die (2) of the super-thick variable-curvature composite product is a die separating tool (6) of a divided bottommost sub-layer (11); and the mold separating tool (6) is provided with a detachable total end (21) and a total baffle (22) for molding the whole super-thickness variable-curvature composite material (1).
4. The method for forming the super-thick variable-curvature composite part by split-die paving and self-adapting soft die according to claim 3, which is characterized by comprising the following steps of: after the bottom-layer sub-layer (11) is hot-pressed and preformed, demolding is not needed, only the end head (61) and the baffle (62) of the bottom-layer sub-layer (11) mold separating tool (6) are required to be disassembled, then the rest sub-layers (11) are sequentially combined on the bottom-layer sub-layer (11) in sequence, and then the total end head (21) and the total baffle (22) are assembled and hot-pressed again.
5. The method for the split-die paving self-adaptive soft die forming of the super-thick variable-curvature composite part, which is characterized by comprising the following steps of: and when the sub-layers (11) are sequentially combined in sequence, a laser projector is adopted for auxiliary positioning: when each sub-layer (11) is combined, the laser projection of the sub-layer (11) to be combined is projected on a paving tool or the sub-layer (11) which is combined, and the boundary with obvious surface characteristics of the sub-layer (11) to be combined is selected to be positioned and matched with the corresponding laser projection boundary.
6. The method for the split-die paving self-adaptive soft die forming of the super-thick variable-curvature composite part, which is characterized by comprising the following steps of: the curing and forming process is to package all the sub-layers (11) and the self-adaptive soft mold (3) on an ultra-thickness variable-curvature composite part forming mold (2), send the materials into an autoclave for curing, and the parameters of the curing and forming process are as follows: the temperature is 180+/-6 ℃, the curing pressure is 0.55-0.65 Mpa, and the heat preservation time is 150-220 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111509706.7A CN114379110B (en) | 2021-12-10 | 2021-12-10 | Split-mold paving self-adaptive soft mold forming method for super-thickness variable-curvature composite material part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111509706.7A CN114379110B (en) | 2021-12-10 | 2021-12-10 | Split-mold paving self-adaptive soft mold forming method for super-thickness variable-curvature composite material part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114379110A CN114379110A (en) | 2022-04-22 |
| CN114379110B true CN114379110B (en) | 2024-01-30 |
Family
ID=81196123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111509706.7A Active CN114379110B (en) | 2021-12-10 | 2021-12-10 | Split-mold paving self-adaptive soft mold forming method for super-thickness variable-curvature composite material part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114379110B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104290337A (en) * | 2014-08-14 | 2015-01-21 | 航天海鹰(镇江)特种材料有限公司 | Method for realization of co-cementing of reinforcing rib web composite produced part by accurate positioning soft tooling |
| CN105643951A (en) * | 2015-09-29 | 2016-06-08 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Pre-forming method for large-thickness composite material structure |
| CN107199714A (en) * | 2017-06-27 | 2017-09-26 | 中国航空工业集团公司基础技术研究院 | A kind of variable curvature Composite Material Stiffened Panel moulding technique of co-curing |
| CN110774515A (en) * | 2019-10-08 | 2020-02-11 | 华中科技大学 | Method for manufacturing thick-wall transparent plastic part by sequential welding |
| CN110815854A (en) * | 2019-11-26 | 2020-02-21 | 航天海鹰(镇江)特种材料有限公司 | Manufacturing method and application of flexible tool for molding longitudinal and transverse T-shaped reinforcing rib workpieces |
| CN110815857A (en) * | 2019-11-26 | 2020-02-21 | 航天海鹰(镇江)特种材料有限公司 | Forming method and application of flexible tool for reinforcing rib and web plate co-bonding |
| CN110815856A (en) * | 2019-11-26 | 2020-02-21 | 航天海鹰(镇江)特种材料有限公司 | Soft die manufacturing method for forming I-beam composite material part and application thereof |
| CN111572061A (en) * | 2020-05-26 | 2020-08-25 | 航天海鹰(镇江)特种材料有限公司 | Manufacturing method of fully-adaptive support tool for soft mold auxiliary support |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2310192B1 (en) * | 2008-06-13 | 2014-02-26 | Lockheed Martin Corporation | Process and apparatus for molding continuous-fiber composite articles |
-
2021
- 2021-12-10 CN CN202111509706.7A patent/CN114379110B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104290337A (en) * | 2014-08-14 | 2015-01-21 | 航天海鹰(镇江)特种材料有限公司 | Method for realization of co-cementing of reinforcing rib web composite produced part by accurate positioning soft tooling |
| CN105643951A (en) * | 2015-09-29 | 2016-06-08 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Pre-forming method for large-thickness composite material structure |
| CN107199714A (en) * | 2017-06-27 | 2017-09-26 | 中国航空工业集团公司基础技术研究院 | A kind of variable curvature Composite Material Stiffened Panel moulding technique of co-curing |
| CN110774515A (en) * | 2019-10-08 | 2020-02-11 | 华中科技大学 | Method for manufacturing thick-wall transparent plastic part by sequential welding |
| CN110815854A (en) * | 2019-11-26 | 2020-02-21 | 航天海鹰(镇江)特种材料有限公司 | Manufacturing method and application of flexible tool for molding longitudinal and transverse T-shaped reinforcing rib workpieces |
| CN110815857A (en) * | 2019-11-26 | 2020-02-21 | 航天海鹰(镇江)特种材料有限公司 | Forming method and application of flexible tool for reinforcing rib and web plate co-bonding |
| CN110815856A (en) * | 2019-11-26 | 2020-02-21 | 航天海鹰(镇江)特种材料有限公司 | Soft die manufacturing method for forming I-beam composite material part and application thereof |
| CN111572061A (en) * | 2020-05-26 | 2020-08-25 | 航天海鹰(镇江)特种材料有限公司 | Manufacturing method of fully-adaptive support tool for soft mold auxiliary support |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114379110A (en) | 2022-04-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108407332B (en) | Compression molding method for composite material grid skin structural part | |
| TWI520844B (en) | Method for fabricating preform and fiber-reinforced resin molded article | |
| JP5971409B2 (en) | Manufacturing method of fiber reinforced composite material molded article | |
| CN110103487B (en) | Process method for forming composite material part with Z-shaped section | |
| CN109228398B (en) | Production process method of die-pressed composite plate spring | |
| CN110103488B (en) | Continuous die pressing manufacturing process of fan blade thermoplastic composite material beam cap | |
| CN108928012A (en) | A kind of process of efficient forming composite leaf spring | |
| CN108016054A (en) | Carbon fibre composite is molded membranous disc manufacturing process | |
| CN113681937B (en) | Composite material cap-shaped stringer wallboard structure and preparation method | |
| CA3088144A1 (en) | Method for producing fiber-reinforced resin | |
| CN114269548A (en) | Method and device for producing a component made of a fiber composite material | |
| CN111113943A (en) | C-shaped beam forming method and C-shaped beam | |
| CN111941875A (en) | Forming method of carbon fiber composite material for vehicle | |
| CN110091521A (en) | A kind of forming method and composite element of composite element | |
| CN114379110B (en) | Split-mold paving self-adaptive soft mold forming method for super-thickness variable-curvature composite material part | |
| CN117774375A (en) | Composite material ring frame and forming method and device thereof | |
| CN112757663A (en) | Automatic filament-laying forming method for continuous fiber reinforced thermoplastic composite material | |
| CN107351429A (en) | A kind of method of the polymer matrix composites Forming Quality of raising Z Pin enhancings | |
| CN112936909A (en) | Forming process of thickened V-shaped composite material part at bottom of trainer | |
| CN110303693A (en) | A kind of compression-moulding methods of small-sized aerofoil Composite Sandwich part | |
| CN108215239A (en) | A kind of forming method for being suitable for T shapes and L-shaped Composite Panels | |
| CN111169037B (en) | Pressing die and method for molding resin-based composite material special-shaped piece | |
| CN112123810A (en) | Process method for improving forming quality of large-thickness composite material rudder | |
| CN112078150A (en) | Compression molding process of composite plate spring | |
| CN111361179A (en) | Thermoplastic composite material forming process suitable for complex large curvature |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |