CN115320131A - Manufacturing method of CFRP (carbon fiber reinforced plastics) pod rod - Google Patents

Manufacturing method of CFRP (carbon fiber reinforced plastics) pod rod Download PDF

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Publication number
CN115320131A
CN115320131A CN202210926293.0A CN202210926293A CN115320131A CN 115320131 A CN115320131 A CN 115320131A CN 202210926293 A CN202210926293 A CN 202210926293A CN 115320131 A CN115320131 A CN 115320131A
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CN
China
Prior art keywords
pod
rubber core
prepreg
pod rod
rod
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Pending
Application number
CN202210926293.0A
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Chinese (zh)
Inventor
骆海涛
张阔
刘广明
李玉新
张伟
周维佳
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Shenyang Institute of Automation of CAS
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Shenyang Institute of Automation of CAS
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Priority to CN202210926293.0A priority Critical patent/CN115320131A/en
Publication of CN115320131A publication Critical patent/CN115320131A/en
Pending legal-status Critical Current

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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
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3097—Cosmonautical vehicles; Rockets

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

The invention belongs to the technical field of aerospace, and particularly relates to a manufacturing process of a pod rod made of CFRP (carbon fiber reinforced plastics), which comprises the following steps: manufacturing a silicon rubber core; manufacturing a plurality of layers of prepregs; laying a plurality of layers of prepreg on the half pod rod die, and placing a silicon rubber core on the plurality of layers of prepreg; putting the half mould of the bean pod rod into a vacuum bag, and vacuumizing; putting the mixture into an oven to be heated and cured; taking out the formed half-piece of the pod rod made of the CFRP material after the curing is finished; respectively placing the two CFRP material bean pod rod half pieces into two bean pod rod half dies, and gluing an adhesive at the joint of the edges of the two sides of the CFRP material bean pod rod half pieces; and closing and pressing the two half moulds of the pod rods, and forming a finished product of the pod rods made of the CFRP material after the adhesive is completely cured. The invention reduces the manufacturing error, improves the rigidity of the pod rod, and ensures that the pod rod is not easy to bend in the using process.

Description

Manufacturing method of CFRP (carbon fiber reinforced plastics) pod rod
Technical Field
The invention belongs to the technical field of aerospace, and particularly relates to a manufacturing process of a pod rod made of CFRP (carbon fiber reinforced plastics).
Background
The solar sail boom made of the carbon fiber composite material is superior to the traditional metal sail boom in various structural parameters such as weight, volume and the like. Currently, the solar sail booms of pod-bar type cross-section are more widely used than the booms of other cross-sections, and are the first candidates for deployable booms. However, the traditional efficiency of the preparation process is low and the like in the preparation of domestic pod rods. At present, the aerospace industry in China develops rapidly, and the small-sized aerospace-level spacecraft makes a great breakthrough. The composite material has wide application prospect in the field of aerospace. In order to meet the requirements of light weight and small volume of a small-sized spacecraft, a carbon fiber composite material is combined on a spaceflight deployable structure to become a recognized ideal material. The common solar sail truss is made of a composite material with carbon fiber epoxy resin as a substrate, and has the advantages of light weight, high specific strength, high rigidity and the like compared with a traditional metal material composite material. The current method for preparing bean pod stems is as follows: because the cross-sectional shape of the pod rod is required and designed, different molds are required to realize the cross-sectional shapes of the pod rods. The pod rod can be divided into an upper symmetrical shell structure and a lower symmetrical shell structure, each shell structure is obtained by cutting carbon fiber prepreg, the shell structures are laid on the surface of a mould after being cut, a layer of tetrafluoro cloth and an air felt are laid on the shell structures, the other matched mould is pressed on the air felt, the mould is sent into an autoclave to be cured at high temperature and high pressure, at last, half pod rod can be taken out after being cooled at room temperature, and then two half pod rods are bonded together through a glue film to obtain the complete pod rod. With the preparation method, problems of weak adhesion, complex process, incapability of meeting the use requirement of a finished product and the like can occur during the preparation of the pod rod.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a manufacturing method of a pod rod made of a CFRP material, so as to solve the problems that the existing pod rod manufacturing process is not firm in adhesion, the process is complex, and a finished product cannot meet the use requirement. The method has simple process, and can obtain the CFRP pod rod meeting the requirements on strength and rigidity.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a manufacturing method of a CFRP (carbon fiber reinforced plastics) pod rod, which comprises the following steps of:
manufacturing a silicon rubber core;
manufacturing a multilayer prepreg: laying a plurality of layers of prepreg on a flat plate with demolding cloth, and compacting;
paving the manufactured multilayer prepreg on the half pod rod die, and placing a silicon rubber core on the multilayer prepreg;
putting the half mould of the pod rod with the multiple layers of prepregs and the silicon rubber core into a vacuum bag, and vacuumizing;
putting the mixture into an oven, and heating and curing the mixture;
taking out the formed half-piece of the pod rod made of the CFRP material after the curing is finished;
respectively placing the two CFRP material bean pod rod half pieces into two bean pod rod half dies, and gluing adhesives at the joint of the two side edges of the CFRP material bean pod rod half pieces;
and closing and pressing the two half moulds of the pod rods, and forming a finished product of the pod rods made of the CFRP material after the adhesive is completely cured.
The process for manufacturing the silicon rubber core comprises the following steps:
preparing materials for manufacturing a silicon rubber core, wherein the silicon rubber raw materials are an E660A agent and an E660B agent; mixing and stirring the E660A agent and the E660B agent with the same mass to form a silica gel mixing agent;
filling the silica gel mixture into the silica gel core mould through the filling opening to ensure that the silica gel core mould is completely filled with the silica gel mixture;
and curing to form the silicone rubber core.
Taking 150g of the E660A agent and the E660B agent respectively;
and after the silicon rubber core die is filled with the silicon rubber mixture, curing for more than 4 hours at the temperature of not less than 25 ℃.
The silicon rubber core comprises a silicon rubber core body, the silicon rubber core body is of a cylindrical structure, and groove structures are symmetrically arranged on the outer circumference;
the groove structure comprises two arc-shaped grooves which are arranged along the direction of a bus, and edges are formed at the intersection of the two arc-shaped grooves.
The silicone rubber core mold comprises a silicone rubber core upper mold and a silicone rubber core lower mold, wherein molding grooves are formed in the centers of the silicone rubber core upper mold and the silicone rubber core lower mold, and transition curved surfaces are symmetrically arranged on two sides of each molding groove.
The process of making the multilayer prepreg is: the method comprises the steps of firstly wiping the surface of a flat plate with acetone, removing dust and impurities on the surface, after the acetone is volatilized, paving the prepreg on the surface of the flat plate, tearing off a thin film on the surface of the prepreg, paving the prepreg layer by layer, and compacting the prepreg by a heavy object to enable each layer of prepreg to be completely attached.
The upper surface center of the half mould of pod pole be equipped with the constant head tank that the half piece shape of CFRP material pod pole suited, the upper surface both sides of the half mould of pod pole are equipped with a plurality of connecting holes along the length direction interval.
Before the half-mold of the pod rod is placed into a vacuum bag, a layer of tetrafluoro cloth and a layer of breathable felt are laid on the silicon rubber core.
The vacuum bag is made of thermoplastic plastic films.
The curing temperature of the oven was: firstly heating to 130 ℃, keeping for 1 hour, then continuously heating to 180 ℃, and keeping for 2 hours; then the temperature is raised to 190 ℃ and kept for 3 hours, and finally the mixture is naturally cooled to the room temperature.
The invention has the advantages and beneficial effects that: according to the manufacturing method of the CFRP material pod rods, the pod rods are shaped in an extrusion mode of vacuumizing the vacuum bag, compared with the shaping mode in the traditional pod rod manufacturing process, material oxidation in the heating process is avoided, and the semi-pod rods with better material performance are obtained. Meanwhile, the semi-pod rod is uniformly stressed, the semi-pod rod is more convenient to form, and the surface of a finished product is more flat and smooth.
According to the invention, the rubber core is placed in the process of preparing the half pod rod, so that the material can be attached to the die more tightly, the manufacturing error is reduced, the rigidity of the pod rod is improved, and the pod rod is not easy to bend in the using process.
Drawings
FIG. 1 is a schematic structural view of a silicone rubber core mold according to the present invention;
FIG. 2 is a schematic structural view of a lower mold of a silicone rubber core in the present invention;
FIG. 3 is a schematic structural view of a silicone rubber core product of the present invention;
FIG. 4 is a schematic view of a half pod stem half mold of the present invention;
FIG. 5 is a schematic view of a half pod rod of the present invention;
FIG. 6 is a schematic view of a half-pod stem half-piece according to the present invention;
FIG. 7 is a schematic view of a pod rod of the present invention;
FIG. 8 is a schematic view of the configuration of the final pod rod of the present invention;
in the figure: 1. the manufacturing method comprises the following steps of (1) forming a silicon rubber core upper die, 2) forming a silicon rubber core, 21 forming a silicon rubber core, 22 forming an arc-shaped groove, 23 forming a ridge, 3 forming a silicon rubber core lower die, 31 forming a groove, 32 forming a transition curved surface, 4 forming a pod rod half die, 41 forming a positioning groove, 42 forming a connecting hole, 5 forming a pod rod half piece made of CFRP materials, and 6 forming a pod rod finished product.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The invention provides a manufacturing method of pod rods made of CFRP materials, which comprises the following steps as shown in figures 1-8:
manufacturing a silicon rubber core 2;
manufacturing a multilayer prepreg; laying a plurality of layers of prepreg on a flat plate with demolding cloth, and compacting;
paving the manufactured multilayer prepreg on the pod rod half mould 4, and placing the silicon rubber core 2 on the multilayer prepreg;
putting the pod rod half mould 4 with the multiple layers of prepregs and the silicon rubber core 2 into a vacuum bag, and vacuumizing;
putting the mixture into an oven, and heating and curing the mixture;
taking out the formed half-piece 5 of the pod rod made of the CFRP material after the solidification is finished, as shown in figures 5-6;
grinding the bonding edges of the CFRP material pod rod half-pieces 5 by using fine sand paper, respectively placing the two processed CFRP material pod rod half-pieces 5 into two pod rod half-molds 4, and gluing an adhesive at the joint of the edges of two sides of the CFRP material pod rod half-pieces 5;
the two half pod stem molds 4 are closed and pressed tightly and bolted together, and after the adhesive is fully cured, a finished pod stem product 6 of CFRP material is formed, as shown in figures 7-8.
As shown in fig. 1 to 3, in the embodiment of the present invention, the process of manufacturing the silicone rubber core 2 includes the following steps:
preparing a material for manufacturing a silicon rubber core 2, wherein the silicon rubber raw materials are an E660A agent and an E660B agent, the mixture is used according to a one-to-one weight ratio, 150g of each of the E660A agent and the E660B agent is obtained by electronic weighing, poured into a same stirring cup and stirred for about 2 minutes to form a silicon rubber mixture;
pouring the fully-stirred silica gel mixture into a silica gel core mould through a pouring opening to ensure complete filling; after the silicon rubber core mould is filled with the silicon rubber mixture, curing for more than 4 hours at the temperature of not lower than 25 ℃;
after curing, the silicon rubber core 2 is formed and taken out.
As shown in fig. 1-2, in the embodiment of the present invention, the silicon rubber core mold includes a silicon rubber core upper mold 1 and a silicon rubber core lower mold 3, the centers of the silicon rubber core upper mold 1 and the silicon rubber core lower mold 3 are both provided with a forming groove 31, and two sides of the forming groove 31 are symmetrically provided with transition curved surfaces 32.
Specifically, the silicone rubber core upper die 1 and the silicone rubber core lower die 3 are both formed by 3D printing of an ABS material, and have a length of 206mm, a width of 40mm, a height of 24mm, and an opening diameter of the forming groove 31 of 15mm. The positioning holes of the silicon rubber core upper die 1 and the silicon rubber core lower die 3 are aligned through iron wires, and the silicon rubber core upper die 1 and the silicon rubber core lower die 3 are tightly screwed through the winding of an adhesive tape. And meanwhile, whether light leaks is checked through the filling hole, so that the tightness is judged.
As shown in fig. 3, in the embodiment of the present invention, the silicone rubber core 2 includes a silicone rubber core body 21, the silicone rubber core body 21 is a cylindrical structure, and a groove structure is symmetrically arranged on an outer circumference; the groove structure comprises two arc-shaped grooves 22 arranged along the bus direction, the two arc-shaped grooves 22 are respectively matched with the transition curved surfaces 32 of the silicon rubber core upper die 1 and the silicon rubber core lower die 3, and edges 23 are formed at the intersection of the two arc-shaped grooves 22.
In the embodiment of the invention, the process of manufacturing the multilayer prepreg comprises the following steps: cutting the prepreg into preset length, width and fiber angle according to the requirement, wiping the surface with a flat plate by acetone to remove surface dust and impurities, spreading the prepreg on the surface of the flat plate after acetone is volatilized, tearing off a thin film on the surface of the prepreg, laying the prepreg layer by layer, and compacting by a heavy object to ensure that each layer of prepreg is completely attached.
In the embodiment of the present invention, as shown in fig. 4, the center of the upper surface of the pod rod half mold 4 is provided with a positioning groove 41 corresponding to the shape of the CFRP material pod rod half piece 5, and two sides of the upper surface of the pod rod half mold 4 are provided with a plurality of connecting holes 42 at intervals along the length direction.
Further, before the pod rod half-mold 4 is placed into the vacuum bag, a layer of tetrafluoro cloth and a layer of air felt are laid on the silicon rubber core 2 to prevent the prepreg from being bonded with the vacuum bag.
In the examples of the present invention, the curing temperature of the oven was: firstly heating to 130 ℃, keeping for 1 hour, then continuously heating to 180 ℃, and keeping for 2 hours; then the temperature is raised to 190 ℃ and kept for 3 hours, and finally the mixture is naturally cooled to the room temperature. The evacuated state is maintained throughout the heating process prior to full cure.
Preferably, the material of the vacuum bag is made of thermoplastic plastic film to adapt to the curing temperature of the oven.
The finished pod rod product 6 made of the CFRP material, namely the pod rod made of the carbon fiber reinforced composite material, has better rigidity compared with the traditional pod rod manufacturing method, is not easy to bend in use, has obvious effect in the preparation and use of the pod rod with larger size, and can bear larger external load. The inner and outer surfaces of the CFRP pod rod finished product 6 are smooth and flat, and the finished product is beneficial to curling and folding after being completely flattened.
According to the manufacturing method of the CFRP material pod rods, the pod rods are shaped in an extrusion mode of vacuumizing the vacuum bag, compared with the shaping mode in the traditional pod rod manufacturing process, material oxidation in the heating process is avoided, and the semi-pod rods with better material performance are obtained. Meanwhile, the semi-pod rod is uniformly stressed, the semi-pod rod is more convenient to form, and the surface of a finished product is more flat and smooth.
According to the invention, the silicon rubber core is placed in the process of preparing the half pod rod, so that the material can be tightly attached to the die, the manufacturing error is reduced, the rigidity of the pod rod is improved, and the pod rod is not easy to bend in the using process.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, extension, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims (10)

1. A method for manufacturing pod rods made of CFRP materials is characterized by comprising the following steps:
manufacturing a silicon rubber core;
manufacturing a multilayer prepreg: laying a plurality of layers of prepreg on a flat plate with demolding cloth, and compacting;
paving the manufactured multilayer prepreg on the half pod rod die, and placing a silicon rubber core on the multilayer prepreg;
putting the half mould of the pod rod with the multiple layers of prepregs and the silicon rubber core into a vacuum bag, and vacuumizing;
putting into an oven, and heating and curing;
taking out the formed half-piece of the pod rod made of the CFRP material after the curing is finished;
respectively placing the two CFRP material bean pod rod half pieces into two bean pod rod half dies, and gluing adhesives at the joint of the two side edges of the CFRP material bean pod rod half pieces;
and closing and pressing the two half moulds of the pod rods, and forming a finished product of the pod rods made of the CFRP material after the adhesive is completely cured.
2. The method of claim 1, wherein the step of forming the silicone rubber core comprises the steps of:
preparing materials for manufacturing a silicon rubber core, wherein the silicon rubber raw materials are an E660A agent and an E660B agent; mixing and stirring the E660A agent and the E660B agent with the same mass to form a silica gel mixing agent;
pouring the silica gel mixture into the silica gel core mould through the pouring opening to ensure complete filling;
and curing to form the silicone rubber core.
3. The method of claim 2, wherein 150g of each of the E660A agent and the E660B agent is taken;
and after the silicon rubber core die is filled with the silicon rubber mixture, curing for more than 4 hours at the temperature of not less than 25 ℃.
4. The method for manufacturing a pod rod of CFRP material according to claim 2, wherein the silicone rubber core comprises a silicone rubber core body, the silicone rubber core body is of a cylindrical structure, and the outer circumference is symmetrically provided with a groove structure;
the groove structure comprises two arc-shaped grooves which are arranged along the direction of a bus, and edges are formed at the intersection of the two arc-shaped grooves.
5. The method for making a pod rod of CFRP material according to claim 2, wherein the silicone rubber core mold comprises an upper silicone rubber core mold and a lower silicone rubber core mold, the centers of the upper silicone rubber core mold and the lower silicone rubber core mold are both provided with a forming groove, and two sides of the forming groove are symmetrically provided with transition curved surfaces.
6. The method for making pod stems of CFRP material according to claim 1, wherein the process of making the multi-layer prepreg is: firstly, wiping the surface of a flat plate with acetone, removing dust and impurities on the surface, after the acetone is volatilized, spreading the prepreg on the surface of the flat plate, tearing off a thin film on the surface of the prepreg, laying the prepreg layer by layer, and then compacting by a heavy object to ensure that each layer of prepreg is completely attached.
7. The method of claim 1, wherein the center of the upper surface of the half mold for pod rods is provided with a positioning groove corresponding to the shape of the half piece of pod rods made of CFRP material, and two sides of the upper surface of the half mold for pod rods are provided with a plurality of connecting holes at intervals along the length direction.
8. The method of claim 1, wherein a layer of tetrafluoro cloth and a layer of air felt are placed on the silicone rubber core before the pod stem mold half is placed in the vacuum bag.
9. The method of claim 1, wherein the vacuum bag is made of a thermoplastic film.
10. The method of making pod stalks of CFRP material according to claim 1, wherein the curing temperature of the oven is: firstly heating to 130 ℃, keeping for 1 hour, then continuously heating to 180 ℃, and keeping for 2 hours; then the temperature is raised to 190 ℃ and kept for 3 hours, and finally the mixture is naturally cooled to the room temperature.
CN202210926293.0A 2022-08-03 2022-08-03 Manufacturing method of CFRP (carbon fiber reinforced plastics) pod rod Pending CN115320131A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210926293.0A CN115320131A (en) 2022-08-03 2022-08-03 Manufacturing method of CFRP (carbon fiber reinforced plastics) pod rod

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210926293.0A CN115320131A (en) 2022-08-03 2022-08-03 Manufacturing method of CFRP (carbon fiber reinforced plastics) pod rod

Publications (1)

Publication Number Publication Date
CN115320131A true CN115320131A (en) 2022-11-11

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Application Number Title Priority Date Filing Date
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Country Status (1)

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