CN114311747A - Preparation method of fiber-mixed three-dimensional braided composite material pipe and pipe thereof - Google Patents
Preparation method of fiber-mixed three-dimensional braided composite material pipe and pipe thereof Download PDFInfo
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- CN114311747A CN114311747A CN202111656472.9A CN202111656472A CN114311747A CN 114311747 A CN114311747 A CN 114311747A CN 202111656472 A CN202111656472 A CN 202111656472A CN 114311747 A CN114311747 A CN 114311747A
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Abstract
The invention relates to a preparation method of a fiber-mixed three-dimensional braided composite material pipe and a pipe thereof, wherein the preparation method comprises the following steps of manufacturing a core mold; clamping the treated core mold by adopting a robot, arranging the core mold on a knitting machine, fixing the knitted head fibers by the knitting machine, continuously feeding the robot into the core mold, continuously knitting the fibers on the core mold at one time by the knitting machine, and fixing the knitted tail fibers by the knitting machine after the knitting is finished to obtain a preform; and (3) introducing the prefabricated body into the prepared epoxy resin through a vacuum auxiliary forming process, placing the epoxy resin into an oven for forming and curing, and demolding after curing and forming to obtain the three-dimensional braided composite pipe with the fiber hybrid structure. Compared with the prior art, the invention can effectively eliminate the layering phenomenon of the composite material, greatly improve the interlaminar performance of the composite material and solve the problem of low interlaminar shear strength in the traditional process.
Description
Technical Field
The invention relates to the field of three-dimensional weaving technology and composite material forming technology, in particular to a preparation method of a fiber hybrid three-dimensional weaving composite material pipe and a composite pipe.
Background
In recent years, the carbon fiber market is rapidly developed and widely applied to the fields of automobiles, aerospace, buildings and the like. The composite material market in China is developed quite rapidly, the product output is expanded continuously, the national industry policy encourages the composite material industry to develop towards high-technology products, and the investment of newly-increased investment projects of domestic enterprises is increased gradually. The investors' interest in the composite pipe market is becoming more and more intense, which makes the composite pipe market more and more interesting to all parties. The carbon fiber tube is one of carbon fiber basic products with wide application range and large quantity at present, and is also one of important application forms of the carbon fiber composite material. Similar to other applications, carbon fiber tubes are also lightweight materials favored in many fields due to their "lightweight and strong" performance advantages.
The market price of the current carbon fiber pipe material has been restricted to a certain extent, but with the continuous promotion of the technological level and the popularization of the mass production mode, the bottleneck is broken gradually. From the depth and trend of market demands, the development of the carbon fiber tube is developed towards the direction of function specialization and design combination. In conclusion, the product foundation determines the market demand, and the future development of carbon fiber pipes is not a little different and must play an increasingly important role in the process of light weight replacement of metal pipes.
More information about the above solution can also be found in the following documents:
in patent publication No. CN111926454A, a process for three-dimensionally knitting a ribbed tube and a ribbed tube are disclosed, the process is completed on a three-dimensional knitting machine, the three-dimensional knitting machine includes yarn carriers, a plurality of yarn carriers corresponding to a plurality of main knitting yarns are distributed on the circumference of concentric circles with different diameters and are continuously distributed on the circumference; a part of the plurality of yarn carriers corresponding to the plurality of rib knitting yarns is distributed on the same circumference as the main body knitting yarns, and the other part of the plurality of yarn carriers is distributed on the circumference which is arranged in/outside the innermost/outer ring circumference of the main body knitting yarns and is concentric with the innermost/outer ring circumference; the yarn carrying device moves in the radial direction and the circumferential direction to drive the main body weaving yarns and the rib weaving yarns to weave to form the ribbed tube with the reinforcing ribs axially arranged on the outer/inner peripheral side wall.
In patent publication No. CN113183496A, a three-dimensional braided composite material marine conduit and a preparation method thereof are disclosed, the trailing edge of the marine conduit is provided with an integrally formed bionic protruding structure, the marine conduit is formed by compounding a carbon fiber three-dimensional braided structure and a water-resistant resin material, a propeller blade and a propeller hub are installed inside the marine conduit, and the bionic protruding structure comprises saw-tooth-shaped protrusions and circular arc-shaped protrusions which are uniformly arranged along the circumference. The invention carries out composite manufacturing on the three-dimensional woven structure prefabricated part and the water-resistant resin by a vacuum auxiliary technology or an RTM (resin transfer molding) process, and carries out special design on a tail edge structure.
In the process of implementing the invention, the inventor finds that the following problems exist in the prior art:
the existing fiber reinforced composite material pipe is generally prepared by adopting a short fiber reinforced matrix or adopting long fibers and two-dimensional fabric prepreg through a layering process to obtain a composite material part. Finally, the fiber is cut and paved, the fiber has fracture, the interlaminar performance is poor, particularly, the delamination is easy to generate during axial compression, and the interlaminar shear strength is low.
Disclosure of Invention
Therefore, the preparation method of the fiber-mixed three-dimensional braided composite material pipe and the pipe are needed to be provided, and the technical problems that fibers have fractures, interlayer performance is poor, delamination is easy to generate particularly during axial compression, and interlayer shear strength is low in the prior art are solved.
In order to achieve the above object, the inventors provide a method for preparing a fiber hybrid three-dimensional braided composite material pipe, comprising the following steps:
core mould for making
Processing a metal raw material to manufacture a core mold, and coating a release agent on the core mold for later use;
three-dimensional weaving
Clamping the treated core mold by adopting a robot, arranging the core mold on a knitting machine, fixing the knitted head fibers by the knitting machine, continuously feeding the robot into the core mold, continuously knitting the fibers on the core mold at one time by the knitting machine, controlling the moving speed of the robot and the knitting speed of the knitting machine, and fixing the knitted tail fibers by the knitting machine after the knitting is finished to obtain a preform;
curing treatment
And (3) introducing the prefabricated body into the prepared epoxy resin through a vacuum auxiliary forming process, placing the epoxy resin into an oven for forming and curing, and demolding after curing and forming to obtain the three-dimensional braided composite pipe with the fiber hybrid structure.
Different from the prior art, the core mould is manufactured, the processed core mould is clamped by a robot, the core mould is arranged on a knitting machine, the knitting machine fixes the knitted head fibers, the robot continuously sends the core mould, the knitting machine continuously knits the fibers on the core mould at one time, the moving speed of the robot and the knitting speed of the knitting machine are controlled, and after the knitting is finished, the knitting machine fixes the knitted tail fibers to obtain a prefabricated body; and (3) introducing the prefabricated body into the prepared epoxy resin through a vacuum auxiliary forming process, placing the epoxy resin into an oven for forming and curing, and demolding after curing and forming to obtain the three-dimensional braided composite pipe with the fiber hybrid structure. Therefore, the reinforced fibers in the three-dimensional woven composite material adopt an integrated weaving forming process, the fibers are staggered in three-dimensional space according to angles, are integrally continuous, have no seam or fracture, the three-dimensional woven fiber reinforced composite material has a completely integral reinforcing system, the fibers do not have cutting cuts, and the fibers are consistent in orientation in all directions in the plane and out of the plane, so that the layering phenomenon of the composite material can be effectively eliminated, the interlaminar performance of the composite material can be greatly improved, and the problem of low pain points of interlaminar shear strength in the traditional process is solved.
In one embodiment of the present invention, in the step of manufacturing the core mold,
the metal material is treated by applying a release agent to form a core mold, a polytetrafluoroethylene film with a back adhesive is attached to the surface of the core mold, the release agent is applied again, and then three-dimensional weaving is performed.
So, can be better through the polytetrafluoroethylene membrane demold, in the actual production process, the fibre sets up on the mandrel through the polytetrafluoroethylene membrane, and the in-process of drawing of patterns as long as take off the fibre from the polytetrafluoroethylene membrane can, stay the polytetrafluoroethylene membrane on the mandrel, convenient reuse next time because the performance of polytetrafluoroethylene membrane, can be better demold, improve the efficiency of drawing of patterns.
In one embodiment of the present invention, the mold release agent is applied again 2 or more times at 20min intervals.
In this way, by coating the release agent more than 2 times and forming more than 2 layers of release agent at intervals of 20min, better release can be performed, and the release efficiency can be further improved.
In one embodiment of the present invention, the metal raw material is a chrome-plated metal bar, an outer diameter of the chrome-plated metal bar is adapted to an inner diameter of the three-dimensional braided composite pipe, and a cross-sectional shape of the chrome-plated metal bar is a circle, a rectangle, or a polygon, which may be any one or a combination of more of them.
Therefore, the metal raw material is the chrome-plated metal rod, the outer diameter of the chrome-plated metal rod is matched with the inner diameter of the three-dimensional braided composite material pipe, the cross section of the chrome-plated metal rod is circular, rectangular or polygonal, various shapes of pipes can be manufactured, and the pipe is convenient to use.
As an embodiment of the present invention, the extended shape of the chrome-plated metal bar is a straight cylinder shape or a curved shape.
Therefore, the extending shape of the chromium-plated metal rod is a straight cylinder shape or a curve shape, so that an arc-shaped pipe can be manufactured, and the pipe is convenient to use.
As an embodiment of the present invention, in the step of the curing process,
heating to 50 deg.C, holding for one hour, heating to 100 deg.C, holding for one hour, cooling to room temperature, taking out, and demolding.
Therefore, the curing treatment effect can be improved, and scalding is prevented.
In one embodiment of the present invention, in the three-dimensional weaving step,
the fibers are carbon fiber yarns and/or glass fiber yarns.
Therefore, the three-dimensional woven composite pipe with the mixed fibers can be manufactured by mixing the carbon fiber yarns and the glass fiber yarns, the characteristics of the carbon fiber yarns or the glass fiber yarns can be fully utilized, and the carbon fiber yarns or the glass fiber yarns can be selected according to actual needs.
In one embodiment of the present invention, in the three-dimensional weaving step,
the moving speed of the robot is 2mm/s, the speed of the knitting machine is 6mm/s, the knitting angle is 60 degrees, and the fiber knitting thickness is 1.5 mm.
Therefore, the knitting angle and the knitting thickness can be adjusted by controlling the moving speed of the robot and the speed of the knitting machine, and the three-dimensional knitted composite pipe with different performances and different thicknesses can be conveniently produced.
In order to achieve the above object, the inventor also provides a fiber hybrid three-dimensional braided composite pipe, which is prepared by any one of the fiber hybrid three-dimensional braided composite pipe preparation methods provided by the inventor.
Different from the prior art, the fiber-mixed three-dimensional woven composite pipe material adopting the technical scheme adopts an integral weaving forming process, fibers are staggered in three-dimensional space according to angles, are integrally continuous, have no seam or fracture, and the three-dimensional woven fiber reinforced composite material has a completely integral reinforcing system, the fibers do not have cutting notches any more, and the fibers are consistent in orientation in all directions in the plane and out of the plane, so that the layering phenomenon of the composite material can be effectively eliminated, the interlaminar performance of the composite material can be greatly improved, and the problem of low pain points of interlaminar shearing strength in the traditional process is solved.
As an embodiment of the present invention, the fiber hybrid three-dimensional braided composite pipe is applied to the fields of police, security, explosion prevention, riot control, training and defense.
Therefore, the anti-explosion training device can be effectively applied to the fields of police, security, explosion prevention, violence control, training and defense.
The above description of the present invention is only an overview of the technical solutions of the present application, and in order to make the technical solutions of the present application more clearly understood by those skilled in the art, the present invention may be further implemented according to the content described in the text and drawings of the present application, and in order to make the above objects, other objects, features, and advantages of the present application more easily understood, the following description is made in conjunction with the detailed description of the present application and the drawings.
Drawings
The drawings are only for purposes of illustrating the principles, implementations, applications, features, and effects of particular embodiments of the present application, as well as others related thereto, and are not to be construed as limiting the application.
In the drawings of the specification:
fig. 1 is a flow chart of a method of making a fiber hybrid three-dimensional braided composite tubing according to one embodiment of the present application;
FIG. 2 is a perspective view of the preparation of a fiber hybrid three-dimensional braided composite tubing according to one embodiment of the present application;
FIG. 3 is a schematic illustration of the preparation of a fiber hybrid three-dimensional braided composite tubing according to one embodiment of the present application;
FIG. 4 is a schematic structural view of a fiber hybrid three-dimensional braided composite tubing according to one embodiment of the present application;
fig. 5 is a schematic view of a weaving process of the fiber hybrid three-dimensional woven composite tube according to an embodiment of the present application.
The reference numerals referred to in the above figures are explained below:
1. a core mold is provided,
2. a polytetrafluoroethylene film, wherein the polytetrafluoroethylene film is a polytetrafluoroethylene film,
3. a three-dimensional woven composite material.
Detailed Description
In order to explain in detail possible application scenarios, technical principles, practical embodiments, and the like of the present application, the following detailed description is given with reference to the accompanying drawings in conjunction with the listed embodiments. The embodiments described herein are merely for more clearly illustrating the technical solutions of the present application, and therefore, the embodiments are only used as examples, and the scope of the present application is not limited thereby.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or related to other embodiments specifically defined. In principle, in the present application, the technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution as long as there is no technical contradiction or conflict.
Unless defined otherwise, technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the use of relational terms herein is intended only to describe particular embodiments and is not intended to limit the present application.
In the description of the present application, the term "and/or" is a expression for describing a logical relationship between objects, meaning that three relationships may exist, for example a and/or B, meaning: there are three cases of A, B, and both A and B. In addition, the character "/" herein generally indicates that the former and latter associated objects are in a logical relationship of "or".
In this application, terms such as "first" and "second" are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
Without further limitation, in this application, the use of "including," "comprising," "having," or other similar expressions in phrases and expressions of "including," "comprising," or "having," is intended to cover a non-exclusive inclusion, and such expressions do not exclude the presence of additional elements in a process, method, or article that includes the recited elements, such that a process, method, or article that includes a list of elements may include not only those elements but also other elements not expressly listed or inherent to such process, method, or article.
As is understood in the examination of the guidelines, the terms "greater than", "less than", "more than" and the like in this application are to be understood as excluding the number; the expressions "above", "below", "within" and the like are understood to include the present numbers. In addition, in the description of the embodiments of the present application, "a plurality" means two or more (including two), and expressions related to "a plurality" similar thereto are also understood, for example, "a plurality of groups", "a plurality of times", and the like, unless specifically defined otherwise.
The inventor finds that the existing fiber reinforced composite material pipe is generally obtained by adopting a short fiber reinforced matrix or adopting long fibers and two-dimensional fabric prepreg through a layering process to obtain a composite material part. Finally, the fiber is cut and paved, the fiber has fracture, the interlaminar performance is poor, particularly, the delamination is easy to generate during axial compression, and the interlaminar shear strength is low.
To solve the above problems, referring to fig. 1 to 5, the present embodiment relates to a method for preparing a fiber hybrid three-dimensional braided composite material tube, comprising the following steps:
manufacture of the core mold 1
Processing a metal raw material to manufacture a core die 1, and coating a release agent on the core die 1 for later use;
in some embodiments, in the step of manufacturing the core mold 1, a metal raw material is treated with a release agent to be used as the core mold 1, a polytetrafluoroethylene film 2 with a back adhesive is attached to the surface of the core mold 1, the release agent is applied again, and then three-dimensional weaving is performed. So, can be better through the drawing of patterns of polyfluortetraethylene membrane 2, in the actual production process, the fibre sets up on the mandrel 1 through polyfluortetraethylene membrane 2, and the in-process of drawing of patterns as long as take off the fibre from polyfluortetraethylene membrane 2 can, leave polyfluortetraethylene membrane 2 on mandrel 1, make things convenient for reuse next time, because the performance of polyfluortetraethylene membrane 2, can be better draw of patterns, improve the efficiency of drawing of patterns.
In this embodiment, the polytetrafluoroethylene membrane 2 is a microporous membrane made of Polytetrafluoroethylene (PTFE) by calendering, extrusion, biaxial stretching, or the like. The polytetrafluoroethylene membrane 2 has a fibrous microporous structure with a porosity of greater than eighty percent, 14 hundred million micropores per square centimeter, and a pore size in the range of 0.02 μm to 15 μm. Because the fabric substrate of the polytetrafluoroethylene film material is glass fiber, the diameter range of the fiber is 3.30-4.05 μm, the weight of the fiber is more than 150g/m, the coating is mainly made of polytetrafluoroethylene resin, the content of the polytetrafluoroethylene resin is not less than ninety percent, the mass of the coating is almost more than 400g/m, and the thickness of the film is more than 0.5 mm.
In some embodiments, the release agent is applied again more than 2 times, each at 20min intervals. In this way, by coating the release agent more than 2 times and forming more than 2 layers of release agent at intervals of 20min, better release can be performed, and the release efficiency can be further improved.
In some embodiments, the metal raw material is a chrome-plated metal bar, the outer diameter of the chrome-plated metal bar is matched with the inner diameter of the three-dimensional braided composite material 3 pipe, and the cross-sectional shape of the chrome-plated metal bar is circular, rectangular or polygonal, any one or combination of more of the shapes. Therefore, the metal raw material is the chrome-plated metal rod, the outer diameter of the chrome-plated metal rod is matched with the inner diameter of the three-dimensional braided composite material 3 pipe, the cross section of the chrome-plated metal rod is circular, rectangular or polygonal, various shapes of pipes can be manufactured, and the pipe is convenient to use.
In some embodiments, the extended shape of the chrome-plated metal bar is a straight cylinder or a curved shape. Therefore, the extending shape of the chromium-plated metal rod is a straight cylinder shape or a curve shape, so that an arc-shaped pipe can be manufactured, and the pipe is convenient to use.
Specifically, in this embodiment, the diameter of the core mold 1 is the same as the inner diameter of the pipe after molding. The release agent used was 832 semi-permanent release agent available from Kyoto Class technologies, Inc. The application times are 3 times, and the application is carried out for the first time at intervals of 20 min.
Three-dimensional weaving
Clamping the treated core mold 1 by using a robot, arranging the core mold 1 on a knitting machine, fixing the knitted head fibers by using the knitting machine, continuously feeding the robot into the core mold 1, continuously knitting the fibers on the core mold 1 at one time by using the knitting machine, controlling the moving speed of the robot and the knitting speed of the knitting machine, and fixing the knitted tail fibers by using the knitting machine after the knitting is finished to obtain a preform;
in this embodiment, three-dimensional knitting is a key step, and yarns are divided into two systems of knitting yarns and axial yarns. The knitting yarn is hung on the machine chassis and can move on the yarn carrier, and the axial yarn is directly hung on the machine chassis. In the knitting process, each yarn carrying device moves on a machine chassis along different directions according to a certain rule, so that knitting yarns are driven to move, but axial yarns are not moved. Therefore, the knitting yarns are mutually interwoven and crossed together in a three-dimensional space, and the axial yarns are surrounded at the same time to form a non-layered integral structure. The woven structure with human axial yarns is called a three-dimensional five-way structure, and the structure without axial yarns is called a three-dimensional four-way structure. During the weaving process, a preform is formed due to the interlacing and crossing of the yarns.
In this embodiment, the knitting system is provided with a spindle base, a fiber shaft yarn laying creel, a robot sliding table system, a clamping system, a knitting machine system and other devices. The pre-formed fiber weaving angle, the weaving tightness and the weaving thickness of the weaving piece can be controlled by adjusting the fiber quantity of the weaving machine and the speed of the robot sliding table and the weaving machine.
In some embodiments, in the three-dimensional weaving step, the fibers are carbon fiber yarns and/or glass fiber yarns. So, can mix through carbon fiber yarn and glass fiber yarn, make the 3 tubular products of fibre mixed three-dimensional composite material of weaving, can make full use of carbon fiber yarn or glass fiber yarn's characteristics, select carbon fiber yarn or glass fiber yarn according to actual need.
In some embodiments, in the three-dimensional weaving step, the robot moves at a speed of 2mm/s, the braiding machine has a speed of 6mm/s, the braiding angle is 60 °, and the fiber braiding thickness is 1.5 mm. Therefore, the knitting angle and the knitting thickness can be adjusted by controlling the moving speed of the robot and the speed of the knitting machine, and the three-dimensional knitted composite material 3 pipe with different performances and different thicknesses can be conveniently produced.
Curing treatment
And (3) introducing the prefabricated body into the prepared epoxy resin through a vacuum auxiliary forming process, placing the epoxy resin into an oven for forming and curing, and demolding after curing and forming to obtain the three-dimensional braided composite material 3 pipe with the fiber hybrid structure.
In the embodiment, high-strength or high-toughness epoxy resin can be selected as the epoxy resin to obtain the composite material pipes with different performance requirements.
In this embodiment, the core mold is formed by a VARI process, sealing tapes are attached to both ends of the woven core mold 1, a vacuum forming auxiliary material is laid, and vacuum infusion forming is performed, wherein the resin used is epoxy resin. The VARI process is vacuum assisted molding for short, is a novel composite material molding technology with low cost and high performance, and receives wide attention in the field of aviation in recent years. The VARI technique is a molding method in which the fibers and the fabric thereof are impregnated by resin flowing and permeating under vacuum and cured under vacuum.
In the demoulding step, excess fiber and resin on the step of the core mould 1 are cut off, the core mould 1 is stuck with the polytetrafluoroethylene film 2, demoulding is relatively easy,
in some embodiments, in the step of curing, the temperature is raised to 50 ℃, the temperature is maintained for one hour, then the temperature is raised to 100 ℃, the temperature is maintained for one hour, after the temperature is maintained, the oven is cooled to the room temperature, and then the product is taken out for demolding treatment. Therefore, the curing treatment effect can be improved, and scalding is prevented.
Specifically, in this example, the yarn: the carbon fiber adopts Zhongshenying hawk grade T700, 12K; the glass fiber is Mount Taishan glass fiber, 1200tex, alkali-free E glass fiber. Knitting machine: the total number of the fiber spindles is 144, the number of the carbon fibers is 24, the number of the glass fibers is 120, and the ratio of the carbon fiber to the glass fiber spindles is 1: 5. core mold 1: the diameter of the molding region is 25mm, the length thereof is 500mm, the diameter of the 100mm position of the two ends of the core mold 1 is 16mm, and a step is formed with the molding region.
The braiding machine speed was 6mm/s and the slip table speed was 2 mm/s. The thickness of a single layer of the knitted fabric is 1.5mm at a constant speed, the knitted fabric is formed by two layers, and the wall thickness is 3 mm. To obtain a product of 1: 5 a prefabricated body formed by mixing and weaving carbon fiber and glass fiber.
The obtained preform is subjected to vacuum introduction molding, and a Hui-Bai new material science and technology (Shanghai) company ML5417 epoxy resin system is adopted, the curing temperature is kept for 1 hour at 50 ℃, and the temperature is kept for two hours at 100 ℃.
Heating and curing according to a resin curing curve, cooling to room temperature after the curing, cutting off redundant resin and fibers rolled at two ends of the core mold 1, and demolding to obtain the carbon fiber glass fiber 1 with the inner diameter of 25mm and the outer diameter of about 31 mm: 5 the composite material pipe material is mixed and weaved.
In the embodiment, according to the technical scheme, the core mold 1 is manufactured, the treated core mold 1 is clamped by a robot, the core mold 1 is arranged on a knitting machine, the knitting machine fixes the knitted head fibers, the robot continuously sends the core mold 1, the knitting machine continuously knits the fibers on the core mold 1 at one time, the moving speed of the robot and the knitting speed of the knitting machine are controlled, and after the knitting is finished, the knitting machine fixes the knitted tail fibers to obtain a preform; and (3) introducing the prefabricated body into the prepared epoxy resin through a vacuum auxiliary forming process, placing the epoxy resin into an oven for forming and curing, and demolding after curing and forming to obtain the three-dimensional braided composite material 3 pipe with the fiber hybrid structure.
In the embodiment, only one metal core mold 1 is needed, the process is simple, the cost is low, the investment is low, the production efficiency is high, the quality stability is good, the three-dimensional weaving integrated weaving forming process is adopted, the fibers are staggered in three-dimensional space angle, are integrally continuous, have no seam and no fracture, have a completely integral fiber reinforcing system, are not provided with cutting notches, and are consistent in orientation in all directions in the plane and out of the plane, the layering phenomenon of the composite material can be effectively eliminated, the performance of the composite material can be greatly improved, and the problem of low pain points of the interlaminar shearing strength in the traditional process is solved.
In the embodiment, as shown in fig. 4, the invention further relates to a fiber hybrid three-dimensional braided composite material pipe, which is prepared by the preparation method of the fiber hybrid three-dimensional braided composite material pipe.
In some embodiments, the fiber hybrid three-dimensional braided composite tubing is used in police, security, explosion protection, riot control, training, and defense applications. Therefore, the anti-explosion training device can be effectively applied to the fields of police, security, explosion prevention, violence control, training and defense.
In this embodiment, as shown in fig. 5, the fiber-mixed three-dimensional braided composite material pipe may have various shapes according to actual situations, and may be formed by eccentric braiding.
As will be appreciated by one skilled in the art, the above-described embodiments may be provided as a method, apparatus, or computer program product. These embodiments may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. All or part of the steps in the methods according to the embodiments may be implemented by a program instructing associated hardware, where the program may be stored in a storage medium readable by a computer device and used to execute all or part of the steps in the methods according to the embodiments. The computer devices, including but not limited to: personal computers, servers, general-purpose computers, special-purpose computers, network devices, embedded devices, programmable devices, intelligent mobile terminals, intelligent home devices, wearable intelligent devices, vehicle-mounted intelligent devices, and the like; the storage medium includes but is not limited to: RAM, ROM, magnetic disk, magnetic tape, optical disk, flash memory, U disk, removable hard disk, memory card, memory stick, network server storage, network cloud storage, etc.
The various embodiments described above are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a computer apparatus to produce a machine, such that the instructions, which execute via the processor of the computer apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer device to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer apparatus to cause a series of operational steps to be performed on the computer apparatus to produce a computer implemented process such that the instructions which execute on the computer apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that, although the above embodiments have been described herein, the invention is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present invention.
Claims (10)
1. The preparation method of the fiber-mixed three-dimensional braided composite material pipe is characterized by comprising the following steps of:
core mould for making
Processing a metal raw material to manufacture a core mold, and coating a release agent on the core mold for later use;
three-dimensional weaving
Clamping the treated core mold by adopting a robot, arranging the core mold on a knitting machine, fixing the knitted head fibers by the knitting machine, continuously feeding the robot into the core mold, continuously knitting the fibers on the core mold at one time by the knitting machine, controlling the moving speed of the robot and the knitting speed of the knitting machine, and fixing the knitted tail fibers by the knitting machine after the knitting is finished to obtain a preform;
curing treatment
And (3) introducing the prefabricated body into the prepared epoxy resin through a vacuum auxiliary forming process, placing the epoxy resin into an oven for forming and curing, and demolding after curing and forming to obtain the three-dimensional braided composite pipe with the fiber hybrid structure.
2. The method for preparing the fiber hybrid three-dimensional braided composite pipe material according to claim 1, wherein in the step of making the core mold,
the metal material is treated by applying a release agent to form a core mold, a polytetrafluoroethylene film with a back adhesive is attached to the surface of the core mold, the release agent is applied again, and then three-dimensional weaving is performed.
3. The method of claim 2, wherein the releasing agent is applied again more than 2 times at intervals of 20 min.
4. The method for preparing the fiber-mixed three-dimensional braided composite pipe material according to claim 1, wherein the metal raw material is a chrome-plated metal bar, the outer diameter of the chrome-plated metal bar is matched with the inner diameter of the three-dimensional braided composite pipe material, and the cross-sectional shape of the chrome-plated metal bar is circular, rectangular or polygonal, or the combination of any one or more of the metal bar and the chrome-plated metal bar.
5. The method of claim 4, wherein the extended shape of the chrome-plated metal bar is a straight cylinder or a curve.
6. The method for preparing the fiber hybrid three-dimensional braided composite tubing of claim 1, wherein in the step of curing treatment,
heating to 50 deg.C, holding for one hour, heating to 100 deg.C, holding for one hour, cooling to room temperature, taking out, and demolding.
7. The method for preparing the fiber hybrid three-dimensional braided composite tubing of claim 1, wherein in the three-dimensional braiding step,
the fibers are carbon fiber yarns and/or glass fiber yarns.
8. The method for preparing the fiber hybrid three-dimensional braided composite tubing of claim 1, wherein in the three-dimensional braiding step,
the moving speed of the robot is 2mm/s, the speed of the knitting machine is 6mm/s, the knitting angle is 60 degrees, and the fiber knitting thickness is 1.5 mm.
9. A fiber-hybrid three-dimensional braided composite pipe, characterized by being produced by the method for producing the fiber-hybrid three-dimensional braided composite pipe according to any one of claims 1 to 8.
10. The fiber hybrid three-dimensional braided composite tubing of claim 1, wherein the fiber hybrid three-dimensional braided composite tubing is used in police, security, explosion protection, riot control, training and defense applications.
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