CN116728826A - Composite material transmitting cylinder body forming process - Google Patents
Composite material transmitting cylinder body forming process Download PDFInfo
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- CN116728826A CN116728826A CN202310672605.4A CN202310672605A CN116728826A CN 116728826 A CN116728826 A CN 116728826A CN 202310672605 A CN202310672605 A CN 202310672605A CN 116728826 A CN116728826 A CN 116728826A
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- carbon fiber
- composite material
- cylinder body
- forming
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 239000002131 composite material Substances 0.000 title claims abstract description 37
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 61
- 239000004917 carbon fiber Substances 0.000 claims abstract description 61
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 61
- 238000004804 winding Methods 0.000 claims abstract description 45
- 239000003292 glue Substances 0.000 claims abstract description 27
- 239000003822 epoxy resin Substances 0.000 claims abstract description 20
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 20
- 238000002347 injection Methods 0.000 claims abstract description 15
- 239000007924 injection Substances 0.000 claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000002679 ablation Methods 0.000 claims abstract description 12
- 239000003365 glass fiber Substances 0.000 claims abstract description 12
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000004744 fabric Substances 0.000 claims abstract description 6
- 238000005520 cutting process Methods 0.000 claims abstract description 5
- 229920005989 resin Polymers 0.000 claims description 26
- 239000011347 resin Substances 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 9
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 4
- 229920001568 phenolic resin Polymers 0.000 claims description 4
- 239000005011 phenolic resin Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 6
- 238000004321 preservation Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- -1 phenolic aldehyde Chemical class 0.000 abstract description 3
- 238000005452 bending Methods 0.000 abstract description 2
- 230000002706 hydrostatic effect Effects 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 abstract description 2
- 238000007493 shaping process Methods 0.000 abstract 1
- 238000003892 spreading Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 239000011157 advanced composite material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009730 filament winding Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000004046 wet winding Methods 0.000 description 1
Classifications
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- 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
-
- 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
- B29C70/545—Perforating, cutting or machining during or after moulding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention relates to a process method for forming a composite material transmitting cylinder body, which comprises the following steps: pretreating the surface of a core mold; high silica glass fiber/phenolic prepreg with ablation resistance is integrally paved on the mandrel; winding carbon fiber dry yarns on the surface of the high silica glass fiber/phenolic aldehyde prepreg; spreading demolding cloth, a flow guide net, a pressure equalizing plate, a flow guide pipe and a vacuum bag on the surface of the carbon fiber dry yarn winding product, and arranging a glue injection port and a glue outlet for vacuum introduction of epoxy resin; wrapping an electric blanket and a heat preservation layer on the surface of the product, and then solidifying and shaping; finally, demolding and cutting the length to form the product. Compared with the prior art, the invention has the following beneficial effects: the dimensional accuracy and mechanical property of the product meet the technical requirements, the production efficiency is obviously improved, and the manufacturing cost is greatly reduced. Through tests, the static friction force, the hydrostatic test, the bending test, the airtight performance and the like of the cylinder body all meet the technical requirements.
Description
Technical Field
The invention relates to the field of advanced composite material forming technology, in particular to a composite material transmitting cylinder body forming technology method.
Background
The launching tube plays roles in storing, supporting and guiding the missile, the working environment is complex, besides bearing impact load in the lifting and carrying process, the launching tube also needs to bear gas pressure and flushing of gas on the inner wall during launching, and the launching tube has high requirements on materials, structural performance and whole tube precision. The barrel body of the transmitting barrel adopts advanced composite materials to replace traditional metal materials, thereby greatly reducing the quality of a weapon system, effectively reducing the production cost and improving the striking and protecting capabilities of the weapon.
In the design of various composite material launching tube barrels, the high-strength carbon fiber winding forming launching tube barrel is one of the mainstream schemes, can meet the higher requirements of the strength, the rigidity and the function of the launching tube, can realize the light weight of a weapon system, and has great significance for the precision control and the range of missiles.
Composite shooting pots typically require curing to shape with the aid of a large autoclave/oven. Because the length of the cylinder body is longer, the prior art has too high dependence on large-scale curing equipment, and the preparation cost is high; the field environment of the wet winding process of the transmitting cylinder is poor, the defects in the product are more, and the product density is not high.
Disclosure of Invention
The invention solves the technical problems that: the method overcomes the defects of the prior art, and provides a low-cost forming process method for the composite material transmitting cylinder body, aiming at the current situations that the forming process of the composite material transmitting cylinder body depends on large-scale curing equipment too much, the preparation cost is high, the process field environment is poor, the internal defects of products are more, and the compactness is low, so that the product meets the requirements of the transmitting cylinder body on strength and rigidity, wear resistance, low friction, ablation resistance and the like.
The solution of the invention is as follows: a process method for forming a composite material transmitting cylinder body comprises the following steps:
pretreating the surface of the core mould, removing oil stains on the surface, and smearing a release agent;
paving high silica glass fiber/phenolic prepreg on the outer surface of the core mold integrally to form an ablation-resistant layer;
winding carbon fiber dry yarns on the surface of the high silica glass fiber/phenolic aldehyde prepreg to form a carbon fiber dry yarn winding product;
introducing epoxy resin until the epoxy resin fully infiltrates into the carbon fiber dry yarn winding product to form a winding layer;
simultaneously curing and forming phenolic resin prepreg of the ablation-resistant layer and epoxy resin of the winding layer;
demolding the cured and molded product to obtain a composite material transmitting cylinder body blank;
cutting the blank of the composite material transmitting cylinder body to obtain the composite material transmitting cylinder body.
Preferably, according to the layering percentages of different angles and the required fiber volume fractions, the carbon fiber dry yarn winding line type is designed, so that the surface of the carbon fiber dry yarn winding product forms a compact structure and an overhead structure is formed inside, and comprises layering sequence, layering angles, carbon fiber dry yarn materials, yarn strand numbers, yarn widths and layer thicknesses.
Preferably, the carbon fiber dry yarn material is 25k-T700 grade carbon fiber.
Preferably, the layer thickness t ply The yarn width w and the yarn number n satisfy the following relation:
t ply ＝n·ρ l /ρ v /w/v f
in the formula, v f Is the fiber volume fraction; ρ v Is the density of carbon fiber body; ρ l Is the linear density of the carbon fiber.
Preferably, the vacuum introducing method of the epoxy resin comprises the following steps:
sequentially paving demolding cloth, a flow guide net, a pressure equalizing plate, a flow guide pipe and a vacuum bag on the surface of a carbon fiber dry yarn winding product, and arranging a glue injection port and a glue outlet on the vacuum bag;
horizontally placing the core mould, connecting the glue injection port with a resin tank, connecting the glue outlet with a buffer tank, connecting the buffer tank with a vacuum pump, and sealing the vacuum bag; a ball valve is arranged on the glue injection port;
after the resin in the resin tank is subjected to vacuum defoamation treatment, a valve of a glue injection port at the bottom is opened, a vacuum pump is started to start resin introduction, and the resin is kept stand for a period of time when rising to a certain height, so that the epoxy resin fully infiltrates into the carbon fiber dry yarn winding product;
and ending when the glue outlet continuously has resin to emerge and no bubbles exist.
Preferably, the glue injection ports are arranged at the middle position of the bottom of the vacuum bag, and two glue outlets are arranged at the top of the vacuum bag.
Preferably, the number of the guide pipes is two, and the guide pipes are respectively arranged at the bottom and the top of the core mold along the axial direction.
Preferably, the composite material launching tube body is provided with an anti-rotation platform.
Preferably, the curing and molding process conditions are as follows:
the whole process keeps vacuum, wherein the curing time is 2h at 90 ℃, 2h at 130 ℃, 2h at 150 ℃ and 2h at 165 ℃.
Preferably, the surface of the product is wrapped with the electric blanket and the heat preservation layer and then solidified and shaped.
Compared with the prior art, the invention has the beneficial effects that:
compared with the prior art, the invention has the following beneficial effects:
(1) The invention adopts the dry yarn winding and resin vacuum leading-in process, has the advantages of field operation and environment friendliness, high resin utilization rate and reduced material cost.
(2) The carbon fiber winding is performed by using dry yarns, tension is introduced in winding, the product density is improved, and the internal defects of the product are reduced.
(3) The high silica glass fiber/phenolic prepreg layer on the inner surface of the barrel body of the transmitting barrel ensures the requirements of wear resistance, low friction and ablation resistance of the barrel body.
(4) The invention adopts the electric blanket to heat and assist the product to solidify and shape, and the process cost is reduced.
(5) The phenolic resin prepreg (ablation resistant layer) and the vacuum-introduced epoxy resin (winding layer) are cured simultaneously, so that the process steps are saved.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:
FIG. 1 is a process flow diagram of an embodiment of the present invention.
Fig. 2 is a schematic diagram of a composite launching tube core mold with two platforms according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of auxiliary material laying in an embodiment of the present invention.
In the figure, 301-mandrel, 302-dry yarn wound article, 303-release cloth, 304-flow guide net, 305-equalizing plate, 307-vacuum bag, 307-flow guide tube.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
The invention provides a process method for forming a composite material transmitting cylinder body, which is suitable for a cylindrical transmitting cylinder body and is also suitable for a transmitting cylinder body with an anti-rotation platform. By utilizing the process method provided by the invention, the dependence of large-scale curing equipment can be eliminated while each performance meets the technical requirement, so that the preparation cost of the composite material transmitting cylinder body is greatly reduced.
In a specific embodiment of the present invention, the structure of the composite material launching tube core mold with two anti-rotation platforms is shown in fig. 2. According to the product size and shape and position requirements, the core mould is designed, and has a certain taper within the allowable range of the cylinder tolerance, so that the mould is convenient to demould.
Example 1
The embodiment further describes a low-cost molding process method for the composite material transmitting cylinder body. As shown in fig. 1, the specific steps of the process method are as follows:
step one: core mold surface treatment
The mold is assembled on a filament winding machine, the surface of the mold is wiped with acetone for 3 times, oil stains on the surface are removed, and simultaneously, PMR release agents are smeared on the surface of the core mold 301 and the surface of the yarn hanging disc for 5 times.
Step two: ablation-resistant layer paving
1 layer of high silica glass fiber/phenolic prepreg is paved on the surface of a core mold 301, and the axis direction of the core mold 301 is 0 degree. The prepreg overlap region is located at the mandrel landing. The lay-up angle of the high silica glass fiber/phenolic prepreg in this example was (0,90). The high silica glass fiber/phenolic prepreg is provided with an ablation resistant effect.
Step three: winding of dry yarn
According to the size of the anti-rotation platform, the required layering form of the circle filling of the platform is calculated, the circle filling of the carbon fiber cloth is adopted, then carbon fiber dry yarn winding is carried out on the surface of the high silica glass fiber/phenolic prepreg, a carbon fiber dry yarn winding product 302 is formed, the carbon fiber winding adopts dry yarn winding, winding tension is introduced, and the product density can be improved.
The carbon fiber winding can carry out mesostructural design on a winding product: according to the layering percentages of different angles and the required fiber volume fractions, the winding line type of the carbon fiber dry yarns is designed, so that the surface of the carbon fiber dry yarn winding product 302 forms a compact structure, and an overhead structure is formed inside, thereby being beneficial to the flow of epoxy resin. The carbon fiber dry yarn winding line type comprises a layering sequence, a layering angle, a carbon fiber dry yarn material, yarn strands, yarn widths and layer thicknesses.
Layer thickness t ply The yarn width w and the yarn number n satisfy the following relation:
t ply ＝n·ρ l /ρ v /w/v f
wherein t is ply Is the layer thickness; v f Is the fiber volume fraction; ρ v The density of the carbon fiber body is g/cm3; ρ l Is the linear density of carbon fiber, g/m; w is the yarn width set by the machine and mm; n is the number of strands.
According to the above formula, in this example, a 5mm wall thickness composite material launch canister is recommended to be wound with the wire type as shown in Table 1 below. In the table, the carbon fiber dry yarn material is 25k-T700 grade carbon fiber; the density ρv=1.78 g/cm of the fiber mass 3 The method comprises the steps of carrying out a first treatment on the surface of the Fiber linear density ρl=1.58 g/m; the required fiber volume fraction vf=60%, and the yarn piece development theoretical width was 9.5mm.
TABLE 1 wound wire form
| Sequence number | Layering | Material | Number of strands | Yarn width/mm | Layer thickness/mm |
| 1 | 0 | 25k-T700 carbon fiber | 2 | 9.5 | 0.3115 |
| 2 | 45/-45 | 25k-T700 carbon fiber | 1 | 9.5 | 0.3115 |
| 3 | 90 | 25k-T700 carbon fiber | 2 | 9.5 | 0.3115 |
| 4 | 0 | 25k-T700 carbon fiber | 3 | 11.2 | 0.3963 |
| 5 | 45/-45 | 25k-T700 carbon fiber | 1 | 12 | 0.2466 |
| 6 | 90 | 25k-T700 carbon fiber | 3 | 11.2 | 0.3963 |
| 7 | 0 | 25k-T700 carbon fiber | 4 | 12 | 0.4931 |
| 8 | 90 | 25k-T700 carbon fiber | 4 | 12 | 0.4931 |
| 9 | 0 | 25k-T700 carbon fiber | 3 | 11.2 | 0.3963 |
| 10 | 45/-45 | 25k-T700 carbon fiber | 1 | 12 | 0.2466 |
| 11 | 90 | 25k-T700 carbon fiber | 3 | 11.2 | 0.3963 |
| 12 | 0 | 25k-T700 carbon fiber | 2 | 9.5 | 0.3115 |
| 13 | 45/-45 | 25k-T700 carbon fiber | 1 | 9.5 | 0.3115 |
| 14 | 90 | 25k-T700 carbon fiber | 2 | 9.5 | 0.3115 |
Step four: vacuum bag
As shown in fig. 3, in this embodiment, a demolding cloth 303, a diversion net 304 and a pressure equalizing plate 305 are sequentially laid on the surface of a carbon fiber dry yarn winding product 302, and a diversion pipe 306 is respectively laid at the bottom and the top of a core mold 301 along the axial direction, so that the resin can flow transversely. And a glue injection port is arranged in the middle of the bottom of the vacuum bag, a ball valve is arranged, and two glue outlets are respectively arranged at two ends of the top of the vacuum bag. A ball valve is arranged on the glue injection port; the glue injection port is connected with the resin tank, the glue outlet is connected with the buffer tank, the buffer tank is connected with the vacuum pump, and the vacuum bag is sealed. And (3) vacuumizing and detecting leakage after closing all valves, ensuring that the vacuum gauge pressure is less than or equal to-0.096 MPa, closing a vacuum pump and keeping for 20 minutes, and checking whether the vacuum bag leaks or not, and if the vacuum bag leaks, repairing the vacuum bag.
In this embodiment, the equalizing plate 305 is formed by splicing two symmetrical semicircular shell components, the flow guide pipe 306 is located at the joint of the two semicircular shell components of the equalizing plate, and after the flow guide pipe 306 is covered by a rectangular flow guide net, two sides of the flow guide net are pressed in the two semicircular shell components, so as to fix the flow guide pipe 306.
Step five: vacuum introduction of resin
Introducing epoxy resin until the epoxy resin fully infiltrates into the carbon fiber dry yarn winding product 302 to form a winding layer;
the mandrel 301 is placed horizontally and the anti-rotation land area is in an up-down orientation. After the resin is prepared according to a preset proportion, the resin in the resin tank is subjected to vacuum defoamation treatment, a valve of a glue injection port at the bottom is opened, a vacuum pump is started to start resin introduction, the resin stands for a period of time when rising to a certain height, so that the epoxy resin fully infiltrates into the carbon fiber dry yarn winding product 302, and when the glue outlet continuously has the resin to emerge and has no bubbles, the process is finished. In this example, the lower the speed of injecting the epoxy resin, the better the epoxy resin is, the more the epoxy resin is injected, and the height is 30mm to 50mm, and the period of time is 60 minutes.
The invention adopts the dry yarn winding and resin vacuum leading-in process, has the advantages of field operation environment friendliness, high resin utilization rate and reduced material cost.
Step six: auxiliary curing of electric blanket
And wrapping an electric blanket and a plurality of heat preservation layers on the outer surface of the vacuum bag, and simultaneously curing and forming phenolic resin prepreg of the ablation-resistant layer and epoxy resin of the winding layer. Meanwhile, 3 thermocouples are separately arranged on the inner surface of the core mold 301, the temperature rise condition is monitored in real time, and the curing is carried out according to a process system of keeping vacuum in the whole process, wherein the curing time is 2h at 90 ℃, 2h at 130 ℃, 2h at 150 ℃ and 2h at 165 ℃. The heat preservation time error in the curing process is controlled to be +/-10 min, and the heat preservation temperature error is controlled to be +/-5 ℃.
And an electric blanket is adopted to heat and assist the product to solidify and shape, so that the process cost is reduced.
Step seven: demolding
And demolding the cured and molded product to obtain the composite material transmitting cylinder blank.
The demoulding process is as follows: and disassembling the yarn hanging disc, installing a demoulding baffle, and demoulding on a demoulding machine.
Step eight: cutting length
Cutting the blank of the composite material transmitting cylinder body according to the design requirement size on a machine tool to obtain the composite material transmitting cylinder body.
The strength and rigidity of the composite material transmitting cylinder body are realized through the performance of carbon fiber materials and the design of winding lines; the high silica glass fiber/phenolic aldehyde prepreg layer on the inner surface ensures the wear resistance, low friction and ablation resistance requirements of the cylinder.
The dimensional accuracy and various performances of the transmitting cylinder body prepared by the method meet technical requirements, meanwhile, the production efficiency is obviously improved, and the preparation cost is greatly reduced. Through tests, the static friction force, the hydrostatic test, the bending test, the airtight performance and the like of the cylinder body all meet the technical requirements.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the claims without affecting the spirit of the invention.
Claims (10)
1. A process method for forming a composite material transmitting cylinder body is characterized by comprising the following steps:
pretreating the surface of a core mold (301), removing oil stains on the surface, and smearing a release agent;
paving high silica glass fiber/phenolic prepreg on the outer surface of the core mold (301) integrally to form an ablation-resistant layer;
winding carbon fiber dry yarns on the surface of the high silica glass fiber/phenolic prepreg to form a carbon fiber dry yarn winding product (302);
introducing epoxy resin until the epoxy resin fully infiltrates into the carbon fiber dry yarn winding product (302) to form a winding layer;
simultaneously curing and forming phenolic resin prepreg of the ablation-resistant layer and epoxy resin of the winding layer;
demolding the cured and molded product to obtain a composite material transmitting cylinder body blank;
cutting the blank of the composite material transmitting cylinder body to obtain the composite material transmitting cylinder body.
2. The process for forming the composite material transmitting cylinder body according to claim 1, characterized in that according to different angle layering percentages and required fiber volume fractions, a carbon fiber dry yarn winding line type is designed, so that a compact structure is formed on the surface of a carbon fiber dry yarn winding product (302), and an overhead structure is formed inside the carbon fiber dry yarn winding line type, wherein the carbon fiber dry yarn winding line type comprises layering sequence, layering angle, carbon fiber dry yarn material, yarn strand number, yarn width and layer thickness.
3. The process for forming the composite material transmitting cylinder body according to claim 2, wherein the carbon fiber dry yarn material is 25k-T700 grade carbon fiber.
4. A process for forming a composite material launch canister body according to claim 2, characterized in that said layer thickness t ply The yarn width w and the yarn number n satisfy the following relation:
t ply ＝n·ρ l /ρ v /w/v f
in the formula, v f Is the fiber volume fraction; ρ v Is the density of carbon fiber body; ρ l Is the linear density of the carbon fiber.
5. The process for forming the composite material transmitting cylinder body according to claim 1, wherein the vacuum introducing method of the epoxy resin is as follows:
a demolding cloth (303), a diversion net (304), a pressure equalizing plate (305), a diversion pipe (306) and a vacuum bag (307) are sequentially paved on the surface of a carbon fiber dry yarn winding product (302), and a glue injection port and a glue outlet are arranged on the vacuum bag (307);
horizontally placing the core mould, connecting the glue injection port with a resin tank, connecting the glue outlet with a buffer tank, connecting the buffer tank with a vacuum pump, and sealing the vacuum bag; a ball valve is arranged on the glue injection port;
after the resin in the resin tank is subjected to vacuum defoamation treatment, a valve of a glue injection port at the bottom is opened, a vacuum pump is started to start resin introduction, and the resin is kept stand for a period of time every time the resin rises to a certain height, so that the epoxy resin fully infiltrates into the carbon fiber dry yarn winding product (302);
and ending when the glue outlet continuously has resin to emerge and no bubbles exist.
6. The process for forming the composite material transmitting cylinder body according to claim 5, wherein the glue injection ports are arranged at the middle position of the bottom of the vacuum bag (307), and two glue outlets are arranged at the top of the vacuum bag (307).
7. The process of forming composite material emitting cylinder according to claim 5, wherein the number of the flow guide pipes is two, and the flow guide pipes are respectively arranged at the bottom and the top of the core mold along the axial direction.
8. The process for forming the composite material launching tube body according to claim 1, wherein the composite material launching tube body is provided with an anti-rotation platform.
9. The process for forming the composite material transmitting cylinder body according to claim 1, wherein the curing and forming process conditions are as follows:
the whole process keeps vacuum, wherein the curing time is 2h at 90 ℃, 2h at 130 ℃, 2h at 150 ℃ and 2h at 165 ℃.
10. The process of forming composite material transmitting cylinder as claimed in claim 9, wherein the product is solidified and shaped after being coated with electric blanket and heat insulating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310672605.4A CN116728826A (en) | 2023-06-07 | 2023-06-07 | Composite material transmitting cylinder body forming process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310672605.4A CN116728826A (en) | 2023-06-07 | 2023-06-07 | Composite material transmitting cylinder body forming process |
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| CN116728826A true CN116728826A (en) | 2023-09-12 |
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| CN202310672605.4A Pending CN116728826A (en) | 2023-06-07 | 2023-06-07 | Composite material transmitting cylinder body forming process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117002035A (en) * | 2023-09-27 | 2023-11-07 | 天津爱思达航天科技股份有限公司 | Composite material transmitting cylinder and preparation method thereof |
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2023
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117002035A (en) * | 2023-09-27 | 2023-11-07 | 天津爱思达航天科技股份有限公司 | Composite material transmitting cylinder and preparation method thereof |
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