CN113232329B - Preparation method of integrated composite material conduit with flange plate - Google Patents
Preparation method of integrated composite material conduit with flange plate Download PDFInfo
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- CN113232329B CN113232329B CN202110346782.4A CN202110346782A CN113232329B CN 113232329 B CN113232329 B CN 113232329B CN 202110346782 A CN202110346782 A CN 202110346782A CN 113232329 B CN113232329 B CN 113232329B
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- material conduit
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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
- B29C70/40—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
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
- B29C70/48—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM], e.g. by vacuum
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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
- B29C70/54—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
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
Abstract
The invention discloses a preparation method of an integrated composite material conduit with a flange plate, belonging to the technical field of composite material molding, and being characterized by comprising the following steps: a. completely coating the whole core mould on the core mould by adopting a reinforced fiber fabric through a two-dimensional weaving process; b. a stop block is arranged at the transition step of the core mold; c. setting the fabric in the folding area by using a qualitative agent and a setting tool to enable the shape of the fabric to meet the design size requirement; d. the integrated composite material conduit with the flange plate structure is prepared by a resin transfer molding process. The invention can flexibly adjust the thickness of the pipe wall and the flange plate area according to the actual requirement, flexibly adjust the size of the tows of the braided fiber, the number of the braided yarn ingots and the braiding angle parameters, fully ensure the continuity and the integrity of the structure, and obtain the rapid integral molding of the composite material pipe with the flange plate characteristic meeting the design requirement of mechanical property.
Description
Technical Field
The invention relates to the technical field of composite material forming, in particular to a preparation method of an integrated composite material conduit with a flange plate.
Background
Hollow tubular structures are a form of construction that has found a number of applications in the industrial field. In the field of aviation, various media are conveyed to an engine, an undercarriage and a cabin part by a hollow tubular structure, and various requirements of fuel oil, hydraulic pressure and environmental control of an airplane are met.
At present, the materials of the guide pipe on the airplane are mainly metal materials: the processing technology of the aluminum alloy, the stainless steel or the titanium alloy and the metal conduit mainly relates to a plurality of links of blanking, forming, cutting, oil removing, welding, anodizing, tightness test and paint spraying. Especially for the pipe with the flange structure, the connection of the flange and the pipe wall of the pipe is realized in a welding mode, the integrity of the whole pipe is reduced to a certain degree, the welding position also becomes the weak point of the whole structure, and the pipe is easy to damage in the assembling and using process.
In recent years, a composite material liquid molding technology is widely applied, and the composite material liquid molding technology is a composite material manufacturing technology for performing infiltration, infiltration and molding on a dry fiber reinforced preform by using liquid resin. As an important manufacturing technology of dry fiber reinforced preforms, the two-dimensional weaving has the advantages of strong designability, good shape adaptability and high automation degree, is applied to the fields of aerospace, automobiles and high-end sports goods, and can be combined with resin transfer molding to efficiently and quickly prepare hollow composite material parts with complex shapes.
The Chinese patent document with publication number CN 110239111A and publication date of 09 and 17 in 2019 discloses an integrated molding method of a composite material pipe body and a connecting piece, which comprises the following steps: winding the composite material on the surface of the core mold to form a composite material pipe body, and installing connecting pieces at one end or two ends of the composite material pipe body when the outer diameter of the composite material pipe body reaches the inner diameter of the connecting pieces; winding the winding material continuously from the middle part of the surface of the composite material pipe body to the root part of the composite material pipe body connected with the connecting piece according to the path of the geodesic line, and then continuously winding the flange plate or the upper end surface, the lower end surface and the outer circular surface of the disc of the connecting piece; when the composite material is the combination of fiber and resin, the winding material is fiber or a composite material prepreg tape, and the thickness of the winding layer reaches the standard, heating and pressurizing for curing; or when the composite material and the winding material are both elastic rubber belts and the thickness of the winding layer reaches the standard, vulcanizing; then, the core mold is cooled and removed.
Although the method for integrally molding the composite material pipe body and the connector disclosed in the patent document can be used for integrally molding the composite material pipe body and the connector, the continuity and integrity inside the structure are poor, and the mechanical properties are poor.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a preparation method of an integrated composite material pipe with a flange plate, the thickness of the pipe wall and the flange plate area can be flexibly adjusted according to actual needs, the size of tows of woven fibers, the number of yarns of woven yarns and the weaving angle parameters can be flexibly adjusted, the continuity and the integrity of the interior of a structure are fully ensured, and the rapid integrated forming of the composite material pipe with the flange plate characteristic meeting the design requirement of mechanical properties is obtained.
The invention is realized by the following technical scheme:
the preparation method of the integrated composite material conduit with the flange plate is characterized by comprising the following steps of:
a. designing a detachable two-section core mould according to the diameter of the conduit and the diameter of the flange plate, and completely coating the whole core mould on the core mould by adopting a reinforced fiber fabric through a two-dimensional weaving process according to design requirements;
b. after weaving, mounting a stop block at the transition step of the core mold, and enabling the stop block to abut against the large end face of the core mold connection part;
c. removing the core mould at the big end, folding the reinforced fiber fabric coated at the big end according to the design thickness requirement, and shaping the fabric in the folding area by adopting a qualitative agent and a shaping tool to ensure that the shape of the fabric meets the design size requirement;
d. and taking down the shaping tool, putting the pre-shaped prefabricated body into the shaping tool, and then preparing the integrated composite material conduit with the flange plate structure by a resin transfer molding process.
The reinforced fiber fabric is one or more of glass fiber, quartz fiber, basalt fiber, carbon fiber and aramid fiber.
In the step a, the two-dimensional knitting process is a two-dimensional two-axis knitting process or a two-dimensional three-axis knitting process.
The weaving angle of the reinforced fiber fabric woven by the two-dimensional weaving process is 15-85 degrees.
In the step c, the shaping treatment is one or more of solution shaping, powder shaping and film shaping.
In the step d, the fiber volume fraction in the composite material conduit is 30-55%.
In the step d, the bus in the composite material conduit is characterized by one or more of a straight bus, a folded bus, an arc bus and a free bus.
In the step d, the section of the composite material conduit is characterized by an equal-thickness equal section or an equal-thickness variable section.
The beneficial effects of the invention are mainly shown in the following aspects:
1. according to the invention, a detachable two-section type core mould is designed according to the diameter of a conduit and the diameter of a flange plate, and the whole core mould is completely coated on the core mould by adopting a reinforced fiber fabric through a two-dimensional weaving process according to the design requirement; b. after weaving, mounting a stop block at the transition step of the core mold, and enabling the stop block to abut against the large end face of the joint of the core mold; c. removing the core mould at the big end, folding the reinforced fiber fabric coated at the big end according to the design thickness requirement, and shaping the fabric in the folding area by adopting a qualitative agent and a shaping tool to ensure that the shape of the fabric meets the design size requirement; d. the forming tool is taken down, the preformed body after pre-forming is placed into the forming tool, then the integrated composite material pipe with the flange plate structure is prepared through a resin transfer molding forming process, the thickness of the pipe wall and the flange plate area can be flexibly adjusted according to actual needs, the size of tows of woven fibers, the number of woven yarn spindles and the weaving angle parameters are flexibly adjusted, the continuity and integrity of the interior of the structure are fully guaranteed, and the rapid integrated forming of the composite material pipe with the flange plate characteristics meeting the mechanical property design requirements is obtained.
2. The invention is suitable for the liquid forming process of composite material pipe products with flange structural characteristics, can keep the continuity of the reinforced fiber fabric in the whole structure, and overcomes the defect that the discontinuous fiber at the flange and the pipe wall can not be realized in the conventional secondary bonding process or injection molding process.
3. The invention fully exerts the overall reinforcing effect and advantages of the reinforced fiber fabric, has the characteristics of low cost and high efficiency, and can realize the rapid manufacture of various typical tube structure composite materials with flange plate structures.
Detailed Description
Example 1
A preparation method of an integrated composite material conduit with a flange plate comprises the following steps:
a. designing a detachable two-section type core mold according to the diameter of the guide pipe and the diameter of the flange plate, and completely coating the whole core mold on the core mold by adopting a reinforced fiber fabric through a two-dimensional weaving process according to the design requirement;
b. after weaving, mounting a stop block at the transition step of the core mold, and enabling the stop block to abut against the large end face of the core mold connection part;
c. removing the core mould at the big end, folding the reinforced fiber fabric coated at the big end according to the design thickness requirement, and shaping the fabric in the folding area by adopting a qualitative agent and a shaping tool to ensure that the shape of the fabric meets the design size requirement;
d. and taking down the shaping tool, putting the pre-shaped prefabricated body into the shaping tool, and then preparing the integrated composite material conduit with the flange plate structure by a resin transfer molding process.
A, designing a detachable two-section type core mould according to the diameter of a conduit and the diameter of a flange plate, and completely coating the whole core mould on the core mould by adopting a reinforced fiber fabric through a two-dimensional weaving process according to design requirements; b. after weaving, mounting a stop block at the transition step of the core mold, and enabling the stop block to abut against the large end face of the joint of the core mold; c. removing the core mould at the big end, folding the reinforced fiber fabric coated at the big end according to the design thickness requirement, and shaping the fabric in the folding area by adopting a qualitative agent and a shaping tool to ensure that the shape of the fabric meets the design size requirement; d. the forming tool is taken down, the preformed body after pre-forming is placed into the forming tool, then the integrated composite material pipe with the flange plate structure is prepared through a resin transfer molding forming process, the thickness of the pipe wall and the flange plate area can be flexibly adjusted according to actual needs, the size of tows of woven fibers, the number of woven yarn spindles and the weaving angle parameters are flexibly adjusted, the continuity and integrity of the interior of the structure are fully guaranteed, and the rapid integrated forming of the composite material pipe with the flange plate characteristics meeting the mechanical property design requirements is obtained.
Example 2
A preparation method of an integrated composite material conduit with a flange plate comprises the following steps:
a. designing a detachable two-section type core mold according to the diameter of the guide pipe and the diameter of the flange plate, and completely coating the whole core mold on the core mold by adopting a reinforced fiber fabric through a two-dimensional weaving process according to the design requirement;
b. after weaving, mounting a stop block at the transition step of the core mold, and enabling the stop block to abut against the large end face of the core mold connection part;
c. removing the core mould at the big end, folding the reinforced fiber fabric coated at the big end according to the design thickness requirement, and shaping the fabric in the folding area by adopting a qualitative agent and a shaping tool to ensure that the shape of the fabric meets the design size requirement;
d. and taking down the shaping tool, putting the pre-shaped prefabricated body into the shaping tool, and then preparing the integrated composite material conduit with the flange plate structure by a resin transfer molding process.
The reinforced fiber fabric is glass fiber.
In the step a, the two-dimensional weaving process is a two-dimensional biaxial weaving process.
The reinforced fiber fabric is woven by a two-dimensional weaving process, and the weaving angle is 15 degrees.
In the step c, the shaping treatment is solution shaping.
In the step d, the fiber volume fraction in the composite material conduit is 30%.
In the step d, the bus in the composite material conduit is characterized by a straight bus.
In the step d, the section of the composite material conduit is characterized by equal thickness and equal section.
Example 3
A preparation method of an integrated composite material conduit with a flange plate comprises the following steps:
a. designing a detachable two-section type core mold according to the diameter of the guide pipe and the diameter of the flange plate, and completely coating the whole core mold on the core mold by adopting a reinforced fiber fabric through a two-dimensional weaving process according to the design requirement;
b. after weaving, mounting a stop block at the transition step of the core mold, and enabling the stop block to abut against the large end face of the core mold connection part;
c. removing the core mould at the big end, folding the reinforced fiber fabric coated at the big end according to the design thickness requirement, and shaping the fabric in the folding area by adopting a qualitative agent and a shaping tool to ensure that the shape of the fabric meets the design size requirement;
d. and taking down the shaping tool, putting the pre-shaped prefabricated body into the shaping tool, and then preparing the integrated composite material conduit with the flange plate structure by a resin transfer molding process.
The reinforced fiber fabric is quartz fiber.
In the step a, the two-dimensional weaving process is a two-dimensional three-axis weaving process.
The reinforced fiber fabric is woven by a two-dimensional weaving process with a weaving angle of 30 °.
In the step c, the shaping treatment is powder shaping.
In the step d, the fiber volume fraction in the composite material conduit is 35%.
In the step d, the bus in the composite material conduit is characterized by being a folded bus.
In the step d, the section of the composite material conduit is characterized by an equal-thickness variable section.
Example 4
A preparation method of an integrated composite material conduit with a flange plate comprises the following steps:
a. designing a detachable two-section type core mold according to the diameter of the guide pipe and the diameter of the flange plate, and completely coating the whole core mold on the core mold by adopting a reinforced fiber fabric through a two-dimensional weaving process according to the design requirement;
b. after weaving, mounting a stop block at the transition step of the core mold, and enabling the stop block to abut against the large end face of the core mold connection part;
c. removing the core mould at the big end, folding the reinforced fiber fabric coated at the big end according to the design thickness requirement, and shaping the fabric in the folding area by adopting a qualitative agent and a shaping tool to ensure that the shape of the fabric meets the design size requirement;
d. and taking down the shaping tool, putting the pre-shaped prefabricated body into the shaping tool, and then preparing the integrated composite material conduit with the flange plate structure by a resin transfer molding process.
The reinforced fiber fabric is basalt fiber.
In the step a, the two-dimensional weaving process is a two-dimensional biaxial weaving process.
The reinforced fiber fabric is woven by a two-dimensional weaving process, and the weaving angle is 60 degrees.
In the step c, the shaping treatment is film shaping.
In the step d, the fiber volume fraction in the composite material conduit is 45%.
In the step d, the bus in the composite material conduit is characterized by an arc bus.
In the step d, the section of the composite material conduit is characterized by equal thickness and equal section.
Example 5
A preparation method of an integrated composite material conduit with a flange plate comprises the following steps:
a. designing a detachable two-section type core mold according to the diameter of the guide pipe and the diameter of the flange plate, and completely coating the whole core mold on the core mold by adopting a reinforced fiber fabric through a two-dimensional weaving process according to the design requirement;
b. after weaving, mounting a stop block at the transition step of the core mold, and enabling the stop block to abut against the large end face of the core mold connection part;
c. removing the core mould at the big end, folding the reinforced fiber fabric coated at the big end according to the design thickness requirement, and shaping the fabric in the folding area by adopting a qualitative agent and a shaping tool to ensure that the shape of the fabric meets the design size requirement;
d. and taking down the shaping tool, placing the pre-shaped prefabricated body into the shaping tool, and then preparing the integrated composite material conduit with the flange plate structure by a resin transfer molding process.
The reinforced fiber fabric is carbon fiber.
In the step a, the two-dimensional weaving process is a two-dimensional biaxial weaving process.
The reinforced fiber fabric is woven by a two-dimensional weaving process, and the weaving angle is 85 degrees.
In the step c, the shaping treatment is film shaping.
In step d, the fiber volume fraction in the composite conduit is 55%.
In the step d, the bus in the composite material conduit is characterized as an arc bus.
In the step d, the section of the composite material conduit is characterized by equal thickness and equal section.
The method is suitable for the liquid forming process of composite material pipe products with flange structural characteristics, can keep the continuity of the reinforced fiber fabric in the whole structure, and overcomes the defect that the discontinuous fibers at the flange and the pipe wall cannot be realized in the conventional secondary bonding process or injection molding process.
Example 6
A preparation method of an integrated composite material conduit with a flange plate comprises the following steps:
a. designing a detachable two-section core mould according to the diameter of the conduit and the diameter of the flange plate, and completely coating the whole core mould on the core mould by adopting a reinforced fiber fabric through a two-dimensional weaving process according to design requirements;
b. after weaving, mounting a stop block at the transition step of the core mold, and enabling the stop block to abut against the large end face of the core mold connection part;
c. removing the core mould at the big end, folding the reinforced fiber fabric coated at the big end according to the design thickness requirement, and shaping the fabric in the folding area by adopting a qualitative agent and a shaping tool to ensure that the shape of the fabric meets the design size requirement;
d. and taking down the shaping tool, putting the pre-shaped prefabricated body into the shaping tool, and then preparing the integrated composite material conduit with the flange plate structure by a resin transfer molding process.
The reinforced fiber fabric is aramid fiber.
In the step a, the two-dimensional weaving process is a two-dimensional three-axis weaving process.
The reinforced fiber fabric is woven by a two-dimensional weaving process, and the weaving angle is 85 degrees.
In the step c, the shaping treatment is film shaping.
In step d, the fiber volume fraction in the composite conduit is 55%.
In the step d, the bus in the composite material conduit is characterized by being a folded bus.
In the step d, the section of the composite material conduit is characterized by equal thickness and equal section.
Example 7
A preparation method of an integrated composite material conduit with a flange plate comprises the following steps:
a. designing a detachable two-section type core mold according to the diameter of the guide pipe and the diameter of the flange plate, and completely coating the whole core mold on the core mold by adopting a reinforced fiber fabric through a two-dimensional weaving process according to the design requirement;
b. after weaving, mounting a stop block at the transition step of the core mold, and enabling the stop block to abut against the large end face of the core mold connection part;
c. removing the core mould at the big end, folding the reinforced fiber fabric coated at the big end according to the design thickness requirement, and shaping the fabric in the folding area by adopting a qualitative agent and a shaping tool to ensure that the shape of the fabric meets the design size requirement;
d. and taking down the shaping tool, putting the pre-shaped prefabricated body into the shaping tool, and then preparing the integrated composite material conduit with the flange plate structure by a resin transfer molding process.
The reinforced fiber fabric is basalt fiber and carbon fiber.
In the step a, the two-dimensional weaving process is a two-dimensional biaxial weaving process.
The reinforced fiber fabric is woven by a two-dimensional weaving process, and the weaving angle is 85 degrees.
In the step c, the shaping treatment comprises powder shaping and film shaping.
In step d, the fiber volume fraction in the composite conduit is 55%.
In the step d, the bus in the composite material conduit is characterized by a straight bus and a folded bus.
In the step d, the section of the composite material conduit is characterized by equal thickness and equal section.
Example 8
A preparation method of an integrated composite material conduit with a flange plate comprises the following steps:
a. designing a detachable two-section core mould according to the diameter of the conduit and the diameter of the flange plate, and completely coating the whole core mould on the core mould by adopting a reinforced fiber fabric through a two-dimensional weaving process according to design requirements;
b. after weaving, mounting a stop block at the transition step of the core mold, and enabling the stop block to abut against the large end face of the core mold connection part;
c. removing the core mould at the big end, folding the reinforced fiber fabric coated at the big end according to the design thickness, and shaping the fabric in the folding area by using a qualitative agent and a shaping tool to ensure that the shape of the fabric meets the design size requirement;
d. and taking down the shaping tool, putting the pre-shaped prefabricated body into the shaping tool, and then preparing the integrated composite material conduit with the flange plate structure by a resin transfer molding process.
The reinforced fiber fabric is aramid fiber.
In the step a, the two-dimensional weaving process is a two-dimensional biaxial weaving process.
The reinforced fiber fabric is woven by a two-dimensional weaving process, and the weaving angle is 85 degrees.
In the step c, the shaping treatment is film shaping.
In step d, the fiber volume fraction in the composite conduit is 55%.
In the step d, the bus in the composite material conduit is characterized as an arc bus.
In the step d, the section of the composite material conduit is characterized by an equal-thickness variable section.
The reinforced fiber fabric has the advantages of being low in cost and high in efficiency, and the composite material with the flange plate structure and the typical pipe structure can be rapidly manufactured.
Claims (5)
1. The preparation method of the integrated composite material conduit with the flange plate is characterized by comprising the following steps of:
a. designing a detachable two-section type core mold according to the diameter of the guide pipe and the diameter of the flange plate, and completely coating the whole core mold on the core mold by adopting a reinforced fiber fabric through a two-dimensional weaving process according to the design requirement;
b. after weaving, mounting a stop block at the transition step of the core mold, and enabling the stop block to abut against the large end face of the core mold connection part;
c. removing the core mould at the big end, folding the reinforced fiber fabric coated at the big end according to the design thickness requirement, and shaping the fabric in the folding area by adopting a qualitative agent and a shaping tool to ensure that the shape of the fabric meets the design size requirement;
d. taking down the shaping tool, placing the pre-shaped prefabricated body into the shaping tool, and preparing the integrated composite material conduit with the flange plate structure by a resin transfer molding process;
the weaving angle of the reinforced fiber fabric woven by a two-dimensional weaving process is 15-85 degrees;
in the step d, the fiber volume fraction in the composite material conduit is 30-55%;
in the step d, the section of the composite material conduit is characterized by an equal-thickness equal section or an equal-thickness variable section.
2. The method for preparing the integrated composite pipe with the flange plate according to claim 1, wherein the method comprises the following steps: the reinforced fiber fabric is one or more of glass fiber, quartz fiber, basalt fiber, carbon fiber and aramid fiber.
3. The method for preparing the integrated composite pipe with the flange plate according to claim 1, wherein the method comprises the following steps: in the step a, the two-dimensional knitting process is a two-dimensional two-axis knitting process or a two-dimensional three-axis knitting process.
4. The method for preparing the integrated composite pipe with the flange plate according to claim 1, wherein the method comprises the following steps: in the step c, the shaping treatment is one or more of solution shaping, powder shaping and film shaping.
5. The method for preparing the integrated composite pipe with the flange plate according to claim 1, wherein the method comprises the following steps: in the step d, the bus in the composite material conduit is characterized by one or more of a straight bus, a folded bus, an arc bus and a free bus.
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| CN112936912B (en) * | 2021-04-12 | 2023-08-25 | 江苏集萃碳纤维及复合材料应用技术研究院有限公司 | Composite material transmission shaft and forming method thereof |
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| JPH03161324A (en) * | 1989-11-20 | 1991-07-11 | Mitsubishi Electric Corp | Pipe fitted with flange made of fiber reinforced composite material and preparation thereof |
| JP2009542459A (en) * | 2006-07-06 | 2009-12-03 | エアバス ドイッチュラント ゲゼルシャフト ミット ベシュレンクテル ハフツング | Method for producing aerospace and space navigation fiber composite material member and molded core |
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