CN114571747B - Forming method of pulse current solidified carbon fiber composite material - Google Patents
Forming method of pulse current solidified carbon fiber composite material Download PDFInfo
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- CN114571747B CN114571747B CN202210202482.3A CN202210202482A CN114571747B CN 114571747 B CN114571747 B CN 114571747B CN 202210202482 A CN202210202482 A CN 202210202482A CN 114571747 B CN114571747 B CN 114571747B
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 198
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 198
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 198
- 239000002131 composite material Substances 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims abstract description 45
- 239000000463 material Substances 0.000 claims abstract description 46
- 238000007711 solidification Methods 0.000 claims abstract description 11
- 230000008023 solidification Effects 0.000 claims abstract description 11
- 239000004744 fabric Substances 0.000 claims description 38
- 239000000523 sample Substances 0.000 claims description 24
- 229920005989 resin Polymers 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 12
- 238000005520 cutting process Methods 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 238000009529 body temperature measurement Methods 0.000 claims description 8
- 229920000728 polyester Polymers 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 239000002657 fibrous material Substances 0.000 claims description 6
- 239000010453 quartz Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 239000004575 stone Substances 0.000 claims description 5
- 230000002457 bidirectional effect Effects 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 239000002313 adhesive film Substances 0.000 claims description 3
- 239000004918 carbon fiber reinforced polymer Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 229920005992 thermoplastic resin Polymers 0.000 claims description 3
- 229920001187 thermosetting polymer Polymers 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 238000009423 ventilation Methods 0.000 claims 1
- 230000002500 effect on skin Effects 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 7
- 239000007769 metal material Substances 0.000 abstract description 5
- 239000000835 fiber Substances 0.000 abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 13
- 230000001105 regulatory effect Effects 0.000 description 13
- 239000007772 electrode material Substances 0.000 description 9
- 238000005086 pumping Methods 0.000 description 8
- 125000006850 spacer group Chemical group 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 239000004809 Teflon Substances 0.000 description 5
- 229920006362 Teflon® Polymers 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 238000005530 etching Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 239000000565 sealant Substances 0.000 description 5
- 239000004020 conductor Substances 0.000 description 4
- 239000011889 copper foil Substances 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 4
- 238000003331 infrared imaging Methods 0.000 description 4
- 239000004745 nonwoven fabric Substances 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 239000005341 toughened glass Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000011074 autoclave method Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
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- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Moulding By Coating Moulds (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
According to the forming method of the pulse current solidified carbon fiber composite material, metal materials with good conductivity are respectively arranged at two ends of the carbon fiber composite material along the length direction of the fiber to serve as electrodes, a pulse power supply is connected with the electrodes through wires to provide pulse current with controllable frequency and peak value, joule heat is generated in the carbon fiber under the effect of the thermal effect of the current, temperature control is performed by adjusting the average current, meanwhile, the skin depth of the skin effect is changed by adjusting the frequency of the pulse current, the effective resistance of the carbon fiber is changed, the material temperature is cooperatively controlled, and under the auxiliary condition of adding uniform pressure on the carbon fiber composite material, the solidification forming of the carbon fiber composite material is performed according to the solidification temperature requirement of the composite material.
Description
Technical Field
The application relates to the field of carbon fiber composite material curing and forming, in particular to a forming method of a pulse current curing carbon fiber composite material.
Background
Compared with metal materials or other engineering materials, the carbon fiber composite material has higher specific strength, specific modulus, good fatigue resistance and corrosion resistance, and most carbon fiber composite materials can cut the performance of the structural materials by designing the orientation and the dosage of the reinforcing fibers so as to achieve the performance optimization. As an important component of aerospace high-technology products, the carbon fiber composite material can effectively reduce the structural quality of an aircraft, increase the effective load and the range and reduce the cost. Aircraft such as boeing 787 (boeing corporation) and air passenger a350 (air passenger corporation) have replaced more than 50% of their fuselage with carbon fiber composites. As the excellent properties of carbon fiber composites are increasingly recognized and accepted, their use in energy, transportation, automotive, marine, construction and other industrial sectors is rapidly evolving.
The traditional curing process of the carbon fiber composite material adopts an autoclave method, and the air temperature in the autoclave is uniform, the pressure in the autoclave is uniform, the die is relatively simple, the application range is wider, the forming process is stable and reliable, and the like. The method is a first-choice process for forming the main bearing and secondary bearing structural members in the aerospace field. However, autoclave curing composite products have large cost, slow operation and limited product size; the mold needs to withstand the operating temperature and has a high production cost.
The electric current curing of the carbon fiber composite material utilizes the conductivity of the material, and joule heat can be generated when the electric current passes through the material, so that the aim of heating the resin matrix is fulfilled. In theory, as long as each carbon fiber has current conduction, the heating within the whole volume range can generate uniform temperature distribution, and the quick heating and cooling rate is realized due to the sensitive response of the temperature to the current in the carbon fiber, so that the high energy efficiency is achieved. Compared with the traditional autoclave method, the method has high electrothermal conversion efficiency, saves energy sources and can realize rapid heating and solidification. However, the high conductivity of the carbon fiber makes the current required by the material reaching the curing temperature be too large, for example, the current required by heating a piece of carbon fiber composite material with the length of 80mm, the width of 50mm and the thickness of 1mm to 130 ℃ is about 50A, and the large current can generate a great amount of Joule heat and simultaneously generate a current etching effect on the carbon fiber, so that the perforation of the carbon fiber is seriously caused, and the overall mechanical property of the carbon fiber composite material member is influenced. Therefore, a method for solving the problem that the performance of the carbon fiber composite is reduced due to the current etching is needed.
Disclosure of Invention
The present application aims to solve the above-mentioned shortcomings in the prior art and provide a method for forming a pulse current cured carbon fiber composite material.
The embodiment of the application can be realized through the following technical scheme:
a method for forming a pulse current solidified carbon fiber composite material.
The forming method comprises a forming device, wherein the forming device comprises a rigid die 1 with a flat surface, a vacuum bag 7 and a vacuumizing hose 9 which seal and wrap the rigid die, and the vacuum bag 7 and the vacuumizing hose 9 enable the inside of the forming device to be in a vacuum environment; the forming device further comprises an insulating cloth or insulating film 3, an insulating cloth or insulating film 4, carbon fiber prepreg 5, airfelt 6, an electrode 8, a lead 16, a high-frequency pulse power supply 10, a clamp 13, a rigid equalizing plate 14 and a temperature probe 15, wherein one end of the lead 16 is connected with the electrode 8, and the other end of the lead passes through a vacuum bag 7 to be connected with the anode and the cathode of the high-frequency pulse power supply 10;
the molding steps are as follows:
step one: the material is cut and laid for preparation,
cutting out carbon fiber prepreg 5 with required size and quantity, insulating cloth or insulating film 3, isolating cloth or isolating film and 4 air felt with the size larger than the carbon fiber prepreg 5, wherein the carbon fiber prepreg 5 is various carbon fiber reinforced thermosetting resin prepregs, various carbon fiber reinforced thermoplastic resin prepregs, dry carbon fibers and resin sheets or adhesive films;
step two: the material is laid down and then is put down,
sequentially laying an insulating cloth or insulating film 3, an isolating cloth or isolating film 4, a carbon fiber prepreg 5 and an electrode 8 from the surface of the rigid die 1 upwards, and placing the isolating cloth or isolating film 4 and an airfelt 6 on the upper side of the electrode 8 again from bottom to top to form a carbon fiber composite material combination unit 17; the electrodes 8 are arranged at two ends of the carbon fiber prepreg 5 in the length direction;
step three: the circuit is connected with and auxiliary equipment is arranged,
providing uniform auxiliary pressure on the carbon fiber composite material combination unit 17, providing pressing force at the electrode 8 by adopting the clamp 13 and the rigid equalizing plate 14, reducing contact resistance between the electrode 8 and the carbon fiber composite material combination unit 17, and placing the temperature probe 15 right above the carbon fiber composite material combination unit 17 for auxiliary temperature measurement;
step four: the electric parameters are input to heat and solidify,
setting initial current frequency and current magnitude in the high-frequency pulse power supply 10, adjusting the current magnitude or frequency according to the requirement of the curing temperature curve of the multi-layer carbon fiber prepreg 5 and combining the temperature measured by the temperature probe 16, and preferentially adjusting the frequency of the pulse to gradually increase the temperature of the multi-layer carbon fiber prepreg 5, wherein the temperature of the multi-layer carbon fiber prepreg 5 is kept at a proper temperature in the process;
step five: unloading and demolding are carried out,
after the solidification of the multi-layer carbon fiber prepreg 5 is completed, the parameters of the high-frequency pulse power supply 10 are turned off after being zeroed, the vacuum pump 11 is turned off after the parameters are naturally cooled to room temperature, the clamp 13 is taken down, the carbon fiber composite material combination unit 17 is taken out, and the contact part of the multi-layer carbon fiber prepreg 5 and the electrode 8 is cut off, so that the final carbon fiber composite material is obtained.
Further, the width of the electrode 8 is 10 to 30mm.
Further, the rigid die is a metal plate with larger rigidity, such as a stone plate of heat-resistant glass, quartz stone and the like, and an aluminum plate and a steel plate.
Further, when the rigid mold is made of a nonmetallic material, an insulating layer may not be laid.
Further, the airfelt is a high temperature resistant polyester fiber material, and an air permeable layer can be formed on the upper layer of the composite material to prevent a false vacuum state during vacuum sealing.
Further, the vacuum pump is a device capable of providing negative pressure of not less than 0.09 Mpa.
Further, the wire should have a cross-sectional area of greater than 60mm 2 The connection mode of the lead and the electrode can adopt a welding or clamping fixing mode.
Further, the temperature measuring range of the temperature probe should be not less than 0 ℃ to 400 ℃, and the measuring area at least covers the whole carbon fiber composite material combination unit 17.
Further, the high-frequency pulse current can be positive pulse, negative pulse and bidirectional pulse, the pulse frequency is continuously adjustable, the highest pulse frequency is not lower than 100KHz, the pulse current is continuously adjustable from zero, and the maximum current is not lower than 200A.
The forming method of the pulse current solidified carbon fiber composite material provided by the embodiment of the application has at least the following beneficial effects:
(1) The temperature response speed is faster, the current mainly flows on the surface of the carbon fiber due to the skin effect generated by the high-frequency current, and under the condition of the same current, the current density of the high-frequency current on the surface of the carbon fiber is far higher than that of the direct current on the surface of the carbon fiber, so that the temperature on the surface of the carbon fiber is higher, the temperature of the material rises faster, the curing period is shorter, and the curing efficiency is higher.
(2) Lower curing current, increased effective resistance of the carbon fiber material due to skin effect generated by high frequency current, q=i according to joule heat formula 2 Rt, where Q is the Joule heat generated when current passes through the conductor, I is the current magnitude, R is the conductor resistance, and t is the current passing time, it can be seen from the formula that the larger the resistance, the smaller the current required, under the same energizing time, the same Joule heat is generated. Therefore, the same composite material is cured, and the current of the high-frequency current is smaller than that of the direct current.
(3) The method has the advantages that better carbon fiber-resin interface quality is achieved, shorter curing period and lower curing current can be obtained in the steps (1) and (2), so that the influence degree of current etching effect is reduced, meanwhile, due to skin effect generated by high-frequency current, the etching effect of current mainly occurs on the surface of the carbon fiber, notches or grooves are formed on the surface of the carbon fiber, the surface area of the carbon fiber is increased due to the grooves and notches, namely, the contact area between the carbon fiber and the resin is increased, and the quality of the carbon fiber-resin interface layer is better.
Drawings
Fig. 1 is a schematic structural diagram of a carbon fiber composite material combination unit in the present application.
FIG. 2 is a schematic diagram of the entire curing apparatus composition and connection in the present application.
FIG. 3 is a graph of a carbon fiber composite curing temperature process of the present application.
Fig. 4 is a basic flow chart of power supply parameter setting.
Reference numerals in the figures
1. A rigid mold; 2. sealing glue; 3. an insulating cloth or an insulating film; 4. a spacer cloth or a spacer film; 5. carbon fiber prepreg; 6. air-felt; 7. a vacuum bag; 8. an electrode; 9. a vacuum pumping hose; 10. a high frequency pulse power supply; 11. a vacuum pump; 12. a vacuum pumping hose; 13. a clamp; 14. a rigid equalizing plate; 15. a temperature probe; 16. a wire; 17. and a carbon fiber composite material combination unit.
Detailed Description
The present application will be further described below based on preferred embodiments with reference to the accompanying drawings.
In addition, various components on the drawings have been enlarged (thick) or reduced (thin) for ease of understanding, but this is not intended to limit the scope of the present application.
The singular forms also include the plural and vice versa.
In the description of the embodiments of the present application, it should be noted that, if the terms "upper," "lower," "inner," "outer," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or an azimuth or a positional relationship that a product of the application conventionally puts in use, it is merely for convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element to be referred must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the application. Furthermore, in the description of the present application, the terms first, second, etc. are used herein for distinguishing between different elements, but not necessarily for describing a sequential or chronological order of manufacture, and may not be construed to indicate or imply a relative importance, and their names may be different in the detailed description of the application and the claims.
The terminology used in this description is for the purpose of describing the embodiments of the present application and is not intended to be limiting of the present application. It should also be noted that unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the two components can be connected mechanically, directly or indirectly through an intermediate medium, and can be communicated internally. The foregoing will be particularly understood by those skilled in the art as falling within the specific meaning of this application.
The method is characterized in that metal materials with good conductivity are respectively arranged at two ends of the carbon fiber composite material along the length direction of the fiber to serve as electrodes, a pulse power supply is connected with the electrodes through a lead to provide pulse current with controllable frequency and controllable peak value, joule heat is generated in the carbon fiber under the action of the thermal effect of the current, temperature control is performed by adjusting the average current, meanwhile, the skin depth of the skin effect is changed by adjusting the frequency of the pulse current, the effective resistance of the carbon fiber is changed, the material temperature is cooperatively controlled, and the curing and forming of the carbon fiber composite material are performed according to the curing temperature requirement of the composite material under the auxiliary condition of adding uniform pressure on the carbon fiber composite material.
The high-frequency pulse current is added from the lowest current (or 0) to the highest current in a very short time, so that the skin effect of the current passing through the conductor is enhanced, most of the current passes through the surface of the conductor, and the internal current is very small, so that the current etching effect mainly occurs on the surface of the carbon fiber, and the notch generated on the carbon fiber can increase the contact surface between the carbon fiber and the resin, thereby improving the interface impregnation capability and being beneficial to improving the synergistic effect of the resin and the carbon fiber. In addition, the skin effect produced by the high frequency pulsed current increases the effective resistance of the carbon fiber, resulting in a decrease in the current required to heat the same material to curing temperatures.
The forming method of the pulse current solidified carbon fiber composite material comprises the following steps:
step one: the material is cut and laid for preparation,
the forming process comprises a forming device, wherein the forming device comprises a rigid die 1 with a flat surface, a vacuum bag 7 and a vacuumizing hose 9 which seal and wrap the rigid die, and the vacuum bag 7 and the vacuumizing hose 9 enable the inside of the forming device to be in a vacuum environment;
cutting out carbon fiber prepreg 5 with required size and quantity, insulating cloth or insulating film 3 with size larger than carbon fiber composite material, isolating cloth or isolating film and 4 air felt, and cutting two metal materials with length larger than the width of carbon fiber prepreg 5 and good conductivity as electrodes 8, wherein the width of electrodes 8 is 10-30 mm.
The rigid die with a flat surface can ensure the quality of the formed composite material; the rigid die can be a metal plate with larger rigidity such as a stone plate such as heat-resistant glass and quartz stone, an aluminum plate and a steel plate, and when the metal plate is selected as the die, the metal plate has better heat conductivity, and the thickness is not easy to be too thick, so that larger temperature deformation does not occur when the surface is heated to the solidification temperature.
The insulating cloth or the insulating film can be Teflon high-temperature resistant insulating materials, and the high-temperature resistant degree cannot be lower than the highest temperature required by curing the carbon fiber composite material. When the mold is made of nonmetallic materials, an insulating layer is not required to be paved.
The isolating cloth or the isolating film can be high-strength polyester fiber, PET fluorine release material, teflon material and other high-temperature resistant materials for isolation and demolding, and the high-temperature resistant degree cannot be lower than the highest temperature required by curing of the carbon fiber composite material.
The carbon fiber composite material can be various carbon fiber reinforced thermosetting resin prepregs, various carbon fiber reinforced thermoplastic resin prepregs, dry carbon fibers, resin sheets or adhesive films.
The airfelt can be a high-temperature resistant polyester fiber material, and has the main function of forming an airfelt layer on the upper layer of the composite material, preventing a false vacuum state from occurring during vacuum sealing, and ensuring that the high-temperature resistant degree cannot be lower than the highest temperature required by curing of the carbon fiber composite material.
The electrode material is a metal material with good conductivity such as aluminum, silver, copper and the like, and can be in a sheet shape or a strip shape with a certain thickness, and the surface of the electrode material is ensured to be flat in order to prevent uneven contact resistance.
Step two: the material is laid down and then is put down,
sequentially laying an insulating cloth or insulating film 3, an isolating cloth or isolating film 4, a carbon fiber prepreg 5 and an electrode 8 from the surface of the rigid die 1 upwards, and placing the isolating cloth or isolating film 4 and an airfelt 6 on the upper side of the electrode 8 again from bottom to top to form a carbon fiber composite material combination unit 17;
the vacuum bag 7 is connected with the electrodes 8 at the two ends through leads 16, the leads 16 are led out of the vacuum bag 7, one section of the vacuum pumping hose 9 stretches into the vacuum bag 7, the other end of the vacuum pumping hose 9 is connected with the vacuum pump 11 outside the vacuum bag 7, and the material in the vacuum bag 7 is sealed on the rigid die 1 through the sealant 2.
The electrodes 8 are arranged at two ends of the carbon fiber prepreg 5 in the length direction;
the conducting wire has a cross-sectional area of more than 60mm 2 The connection mode of the lead and the electrode can adopt welding or clamping fixation and the like.
The vacuum pump is a device capable of providing negative pressure of not less than 0.09 Mpa.
Step three: the circuit is connected with and auxiliary equipment is arranged,
the lead 16 led out from the electrode 8 is connected with the positive electrode and the negative electrode of the high-frequency pulse power supply 10, uniform auxiliary pressure is provided on the carbon fiber composite material combination unit 17, the clamp 13 is adopted at the electrode 8 to be matched with the rigid equalizing plate 14 to provide pressing force, the contact resistance between the electrode 8 and the carbon fiber composite material combination unit 17 is reduced, and the temperature probe 15 is placed right above the carbon fiber composite material combination unit 17 to assist temperature measurement.
The temperature measurement range of the temperature probe should be not less than 0-400 ℃, and the measurement area at least covers the whole carbon fiber composite material combination unit 17.
Step four: the electric parameters are input to heat and solidify,
the initial current frequency and the current magnitude are set in the high-frequency pulse power supply 10, the current magnitude or the frequency is adjusted according to the curing temperature curve requirement of the multi-layer carbon fiber prepreg 5 and the temperature measured by the temperature probe 16,
to ensure the beneficial effect of skin effect, the frequency of the pulse should be preferentially adjusted to gradually increase the temperature of the composite material.
The high-frequency pulse current form can be positive pulse, negative pulse and bidirectional pulse, the pulse frequency is continuously adjustable, the highest pulse frequency is not lower than 100KHz and is not provided with an upper limit, the pulse current is continuously adjustable from zero, and the maximum current is not lower than 200A and is not provided with an upper limit.
Step five: unloading and demolding are carried out,
after the solidification of the multi-layer carbon fiber prepreg 5 is completed, the parameters of the high-frequency pulse power supply 10 are turned off after being zeroed, the vacuum pump 11 is turned off after the parameters are naturally cooled to room temperature, the clamp 13 is taken down, the carbon fiber composite material combination unit 17 is taken out, and the contact part of the multi-layer carbon fiber prepreg 5 and the electrode 8 is cut off, so that the final carbon fiber composite material is obtained.
The invention is further illustrated by the following specific examples.
The first embodiment is as follows:
the carbon fiber prepreg used in the embodiment is unidirectional T700 carbon fiber/epoxy resin prepreg, the material size is 0.125mm x 8 layers with the length of 240mm x 100mm x 0.125mm x 8 layers, the volume fraction of the carbon fiber is 0.65, and the curing temperature process of the composite material requires heat preservation at 80 ℃ for 40min and 130 ℃ for 40min.
The rigid mould is 1060 aluminium plate with the size of 300mm length, 200mm width and 2mm thickness, the insulating film is Teflon film with the size of 260mm length, 150mm width and 1mm thickness, the heat-resisting limit is 260 ℃, the isolating cloth is high-strength polyester fiber cloth with the size of 250mm length, 150mm width and 1mm thickness, the heat-resisting limit is 150 ℃, the airfelt is PP non-woven fabric with the size of 260mm length, 150mm width and 2mm thickness, the heat-resisting limit is 150 ℃, the electrode material is two copper strips with the size of 10mm width, 3mm thickness and 120mm length, the conducting wire is national standard soft wire copper wire, and the sectional area is 70mm 2 。
The method comprises the following specific steps:
step one: the material is cut and laid for preparation,
wiping the surface of an aluminum plate with the size of 300mm long by 200mm by 2mm clean, and cutting 8 parts of carbon fiber/epoxy resin prepreg with the size of 240mm long by 100mm wide by 0.125mm, an insulating film with the size of 260mm long by 150mm thick by 1mm, an isolating cloth with the size of 250mm long by 150mm thick by 1mm, an airfelt with the size of 260mm long by 150mm thick by 2mm thick and a vacuum bag with the size of 400mm by 300 mm; two copper strips 10mm wide by 3mm thick by 120mm long were cut as electrodes.
Step two: the material is laid down and then is put down,
the insulating cloth or insulating film 3, the isolating cloth or isolating film 4, 8 layers of carbon fiber prepreg 5, electrodes 8 (placed at two ends of the carbon fiber prepreg in the length direction), the isolating cloth 4 and the airfelt 6 are sequentially laid upwards from the surface of the rigid die 1 to form a carbon fiber composite material combination unit 17, the carbon fiber composite material combination unit is connected with the electrodes 8 at two ends through a wire 16, the wire 16 is led out of the vacuum bag 7, one section of a vacuumizing hose 9 stretches into the vacuum bag 7, the other end of the vacuumizing hose 9 is connected with a vacuum pump 11 outside the vacuum bag 7, and materials in the vacuum bag 7 are sealed on the rigid die 1 by adopting sealant 2.
Step three: the circuit is connected with and auxiliary equipment is arranged,
the lead 16 led out from the electrode 8 is connected with the positive electrode and the negative electrode of the high-frequency pulse power supply 10, the other end of the vacuumizing hose is connected with the vacuum pump 11, uniform pressure of 0.095MPa is applied on the material, the clamp 13 is matched with the rigid equalizing plate 14 to provide compressing force at the electrode 8, the contact resistance between the electrode and the carbon fiber prepreg 5 is reduced, and the temperature probe 15 is placed at the position 20cm right above the carbon fiber prepreg 5 to assist temperature measurement.
Step four: the electric parameters are input to heat and solidify,
the current frequency is set to be 50KHz, the current is set to be 10A, the frequency of the pulse is preferentially regulated to ensure the beneficial influence caused by skin effect, the current frequency is increased by 20KHz per minute according to the process requirement of the curing temperature of the carbon fiber prepreg 5, the temperature of the carbon fiber prepreg 5 is gradually increased, the temperature of the carbon fiber prepreg 5 reaches 64 ℃ when the temperature probe observes that the current frequency is regulated to be up to 200KHz, the current is regulated at the moment, the current is increased by 2A per minute from 10A, the temperature of the carbon fiber prepreg 5 reaches about 80 ℃ when the current is 16A, the temperature is kept for 40 minutes, then the current is continuously regulated to be increased by 1A per minute from 16A, and the temperature of the carbon fiber prepreg 5 is stabilized at 130 ℃ when the final parameter is 28A200KHz, and then the temperature is kept for 40 minutes.
Step five: unloading and demolding are carried out,
after the solidification of the multi-layer carbon fiber prepreg 5 is completed, the parameters of the high-frequency pulse power supply 10 are turned off after being zeroed, the vacuum pump 11 is turned off after the parameters are naturally cooled to room temperature, the clamp 13 is taken down, the carbon fiber composite material combination unit 17 is taken out, and the contact part of the multi-layer carbon fiber prepreg 5 and the electrode 8 is cut off, so that the final carbon fiber composite material is obtained.
The natural cooling rate in this embodiment is 4 ℃/min.
The vacuum pump in this example is an electric vacuum pump, and the ultimate vacuum degree is-0.095 MPa.
The temperature probe is an infrared imaging temperature detector, the temperature measuring range is 0-400 ℃, and the placed height can observe the temperature distribution condition in the overall range of the carbon fiber prepreg.
The high-frequency pulse power supply can provide 0-10000A pulse current, the output frequency is 0-200KHz, the output duty ratio is 0-100% and the pulse form is one-way pulse or two-way pulse.
The second embodiment is as follows:
the carbon fiber prepreg 5 used in this embodiment is a bidirectional T300 carbon fiber/epoxy resin prepreg, the material size is 0.25mm x 8 layers with a length of 200mm x 150mm x 0.25mm x 8, the volume fraction of the carbon fiber is 0.68, and the curing temperature process of the carbon fiber prepreg 5 requires heat preservation at 180 ℃ for 150min. The rigid mould is selected to be toughened glass with the size of 400mm long and 300mm wide and 5mm thick, the surface of the toughened glass is insulated, so that insulating cloth is not needed, the insulating film is made of 0.1mmETFE insulating film with the size of 250mm long and 200mm wide and thick, the heat resistance limit is 230 ℃, the airfelt is made of high-temperature-resistant polyester fiber material non-woven fabric with the size of 250mm long and 200mm wide and 1mm thick, the heat resistance limit is 200 ℃, the electrode material is two pieces of copper foil with the width of 20mm thick and 0.5mm long and 140mm thick, the conducting wire is made of national standard soft wire copper wire, and the sectional area is 70mm 2 。。
The method comprises the following specific steps:
step 1: the material is cut and laid for preparation,
wiping the surface of toughened glass with the size of 400mm long and 300mm wide and 5mm thick, and cutting 8 parts of carbon fiber/epoxy resin prepreg with the size of 200mm long and 150mm wide and 0.25mm thick, an isolating film made of 0.1mm ETFE material with the size of 250mm long and 200mm wide and 0.1mm ETFE material, an airfelt with the size of 250mm long and 200mm wide and 1mm thick, and a vacuum bag with the size of 500mm x 400 mm; two copper foils 20mm wide and 0.5mm thick and 140mm long were used as electrode materials.
Step 2: the material is laid down and then is put down,
the method comprises the steps of sequentially laying a spacer cloth or a spacer film 4, 8 layers of carbon fiber prepreg 5, electrodes 8 (arranged at two ends of the carbon fiber prepreg in the length direction), the spacer cloth 4 and an airfelt 6 from the surface of a rigid die 1 to form a carbon fiber composite material combination unit 17, connecting the carbon fiber composite material combination unit with the electrodes 8 at two ends through a lead 16, leading the lead 16 out of a vacuum bag 7, extending one section of a vacuum pumping hose 9 into the vacuum bag 7, connecting the other end of the vacuum pumping hose 9 with a vacuum pump 11 outside the vacuum bag 7, and sealing materials in the vacuum bag 7 on the rigid die 1 by adopting a sealant 2.
Step 3: the circuit is connected with and auxiliary equipment is arranged,
the lead led out from the electrode is connected with the positive electrode and the negative electrode of the high-frequency pulse power supply, the other end of the vacuumizing hose is connected with the vacuum pump, uniform pressure of 0.095MPa is applied to the material, a clamp is adopted at the electrode to be matched with a rigid equalizing plate to provide a pressing force, the contact resistance between the electrode and the carbon fiber prepreg 5 is reduced, and a temperature probe is placed at a position 20cm right above the carbon fiber prepreg 5 to assist in temperature measurement.
Step 4: the electric parameters are input to heat and solidify,
the current frequency is set to be 50KHz, the current is set to be 10A, the frequency of the pulse is preferentially regulated to ensure the beneficial influence caused by skin effect, the current frequency is increased by 20KHz per minute according to the process requirement of the curing temperature of the carbon fiber prepreg 5, the temperature of the carbon fiber prepreg 5 is gradually increased, the temperature of the carbon fiber prepreg 5 reaches 58 ℃ when the temperature probe observes that the current frequency is regulated to be up to 300KHz, the current is regulated at the moment, the current is increased by 2A per minute from 10A, the temperature of the carbon fiber prepreg 5 reaches about 180 ℃ when the current is 35A, and the temperature is kept for 150 minutes.
Step 5; unloading and demolding are carried out,
after the solidification of the multi-layer carbon fiber prepreg 5 is completed, the parameters of the high-frequency pulse power supply 10 are turned off after being zeroed, the vacuum pump 11 is turned off after the parameters are naturally cooled to room temperature, the clamp 13 is taken down, the carbon fiber composite material combination unit 17 is taken out, and the contact part of the multi-layer carbon fiber prepreg 5 and the electrode 8 is cut off, so that the final carbon fiber composite material is obtained.
The natural cooling rate in this embodiment is 4 ℃/min.
The vacuum pump in this example is an electric vacuum pump, and the ultimate vacuum degree is-0.095 MPa.
The temperature probe is an infrared imaging temperature detector, the temperature measuring range is 0-400 ℃, and the placed height can observe the temperature distribution condition in the overall range of the carbon fiber prepreg.
The high-frequency pulse power supply can provide 0-10000A pulse current, the output frequency is 0-300KHz and is adjustable, the output duty ratio is 0-100% and the pulse form is one-way pulse or two-way pulse.
And a third specific embodiment:
the carbon fiber prepreg used in this embodiment is a unidirectional T300 carbon fiber/polypropylene prepreg, the material size is 0.25mm x 8 layers with a length of 350mm x 300mm x 0.25mm x 8, the volume fraction of the carbon fiber is 0.60, and the curing temperature process of the carbon fiber prepreg requires heat preservation for 30min at 150 ℃. The rigid mould is selected to be a quartz plate with the size of 400mm long and 400mm wide and 10mm thick, insulating cloth is not needed because the surface of the quartz plate is insulated, the insulating film is made of 0.1mmTPX material with the size of 370mm long and 340mm wide, the heat resistance limit is 180 ℃, the airfelt is made of high-temperature-resistant polyester fiber material non-woven fabric with the size of 380mm long and 350mm wide and 1mm thick, the heat resistance limit is 200 ℃, the electrode material is two pieces of purple copper foil with the width of 20mm thick and 0.5mm long and 340mm wide, the conducting wire is made of national standard soft wire copper wires, and the sectional area is 70mm 2 。
The method comprises the following specific steps:
step 1: the material is cut and laid for preparation,
wiping the surface of a quartz plate with the size of 400mm long and 400mm wide and 10mm thick, and cutting 8 parts of carbon fiber/polypropylene prepreg with the size of 350mm long and 300mm wide and 0.25mm thick, a separating film made of 0.1mm TPX material with the size of 370mm long and 340mm wide, an airfelt with the size of 380mm wide and 350mm thick and 1mm thick, and a vacuum bag with the size of 500mm and 500mm thick; two red copper foils 20mm wide and 0.5mm thick and 340mm long were used as electrode materials.
Step 2: the material is laid down and then is put down,
the method comprises the steps of sequentially laying a spacer cloth or a spacer film 4, 8 layers of carbon fiber prepreg 5, electrodes 8 (arranged at two ends of the carbon fiber prepreg in the length direction), the spacer cloth 4 and an airfelt 6 from the surface of a rigid die 1 to form a carbon fiber composite material combination unit 17, connecting the carbon fiber composite material combination unit with the electrodes 8 at two ends through a lead 16, leading the lead 16 out of a vacuum bag 7, extending one section of a vacuum pumping hose 9 into the vacuum bag 7, connecting the other end of the vacuum pumping hose 9 with a vacuum pump 11 outside the vacuum bag 7, and sealing materials in the vacuum bag 7 on the rigid die 1 by adopting a sealant 2.
Step 3: the circuit is connected with and auxiliary equipment is arranged,
the lead 16 led out from the electrode 8 is connected with the positive electrode and the negative electrode of the high-frequency pulse power supply 10, the other end of the vacuumizing hose is connected with the vacuum pump 11, uniform pressure of 0.095MPa is applied on the material, the clamp 13 is matched with the rigid equalizing plate 14 to provide compressing force at the electrode 8, the contact resistance between the electrode and the carbon fiber prepreg 5 is reduced, and the temperature probe 15 is placed at the position 20cm right above the carbon fiber prepreg 5 to assist temperature measurement.
Step 4: the electric parameters are input to heat and solidify,
the current frequency is set to be 50KHz, the current is set to be 20A, the frequency of the pulse is preferentially regulated to ensure the beneficial influence caused by skin effect, the current frequency is increased by 20KHz per minute according to the process requirement of the curing temperature of the carbon fiber prepreg 5, the temperature of the carbon fiber prepreg 5 is gradually increased, the temperature of the carbon fiber prepreg 5 reaches 62 ℃ when the temperature probe observes that the current frequency is regulated to be 200KHz at the upper limit, the current is regulated, the current is increased by 3A per minute from 20A, the temperature of the carbon fiber prepreg 5 reaches about 150 ℃ when the current is 54A, and the temperature is kept for 60 minutes.
Step 5; unloading and demolding are carried out,
after the solidification of the multi-layer carbon fiber prepreg 5 is completed, the parameters of the high-frequency pulse power supply 10 are turned off after being zeroed, the vacuum pump 11 is turned off after the parameters are naturally cooled to room temperature, the clamp 13 is taken down, the carbon fiber composite material combination unit 17 is taken out, and the contact part of the multi-layer carbon fiber prepreg 5 and the electrode 8 is cut off, so that the final carbon fiber composite material is obtained.
The natural cooling rate in this embodiment is 4 ℃/min.
The vacuum pump in this example is an electric vacuum pump, and the ultimate vacuum degree is-0.095 MPa.
The temperature probe is an infrared imaging temperature detector, the temperature measuring range is 0-400 ℃, and the placed height can observe the temperature distribution condition in the overall range of the carbon fiber prepreg.
The high-frequency pulse power supply can provide 0-10000A pulse current, the output frequency is 0-200KHz, the output duty ratio is 0-100% and the pulse form is one-way pulse or two-way pulse.
The specific embodiment IV is as follows:
the carbon fiber prepreg used in this embodiment is a unidirectional T800 carbon fiber/polyamide prepreg, the material size is 0.125mm x 8 layers with a length of 80mm x 50mm x 0.125mm x 8, the volume fraction of the carbon fiber is 0.68, and the curing temperature process of the composite material requires heat preservation at 220 ℃ for 10min. The rigid mould is 1060 aluminum plate with the size of 200mm long and 200mm wide and 2mm thick, the insulating film is Teflon film with the size of 150mm long and 150mm thick and 0.5mm thick, the heat resistance limit is 260 ℃, the insulating film is made of FEP material with the size of 370mm long and 340mm thick and 0.1mm, the heat resistance limit is 260 ℃, the airfelt is made of high-temperature-resistant polyester fiber material non-woven fabric with the size of 380mm long and 350mm thick and 1mm thick, the heat resistance limit is 320 ℃, the electrode material is two copper bars with the width of 10mm thick and 2mm long and 80mm thick, the wire is made of national standard soft wire copper wire, and the sectional area is 70mm 2
The method comprises the following specific steps:
step 1: the material is cut and laid for preparation,
wiping the surface of an aluminum plate with the size of 200mm long and 200mm wide and 2mm thick, and cutting 8 parts of carbon fiber/polyamide prepreg with the size of 80mm long and 50mm wide and 0.125mm thick, teflon film with the size of 150mm long and 150mm wide and 0.5mm thick, FEP isolating cloth with the size of 370mm long and 340mm wide and 0.1mm FEP, airfelt with the size of 380mm long and 350mm wide and 1mm thick, and vacuum bag with the size of 240mm and 240mm thick; two red copper bars 10mm wide, 2mm thick and 80mm long were cut as electrode materials.
Step 2: the material is laid down and then is put down,
the insulating cloth or insulating film 3, the isolating cloth or isolating film 4, 8 layers of carbon fiber prepreg 5, electrodes 8 (placed at two ends of the carbon fiber prepreg in the length direction), the isolating cloth 4 and the airfelt 6 are sequentially laid upwards from the surface of the rigid die 1 to form a carbon fiber composite material combination unit 17, the carbon fiber composite material combination unit is connected with the electrodes 8 at two ends through a wire 16, the wire 16 is led out of the vacuum bag 7, one section of a vacuumizing hose 9 stretches into the vacuum bag 7, the other end of the vacuumizing hose 9 is connected with a vacuum pump 11 outside the vacuum bag 7, and materials in the vacuum bag 7 are sealed on the rigid die 1 by adopting sealant 2.
Step 3: the circuit is connected with and auxiliary equipment is arranged,
the lead 16 led out from the electrode 8 is connected with the positive electrode and the negative electrode of the high-frequency pulse power supply 10, the other end of the vacuumizing hose is connected with the vacuum pump 11, uniform pressure of 0.095MPa is applied on the material, the clamp 13 is matched with the rigid equalizing plate 14 to provide compressing force at the electrode 8, the contact resistance between the electrode and the carbon fiber prepreg 5 is reduced, and the temperature probe 15 is placed at the position 20cm right above the carbon fiber prepreg 5 to assist temperature measurement.
Step 4: the electric parameters are input to heat and solidify,
the current frequency is set to 40KHz, the current is set to 8A, the frequency of the pulse is preferentially regulated to ensure the beneficial influence caused by skin effect, the current frequency is increased by 10KHz per minute according to the process requirement of the curing temperature of the carbon fiber prepreg 5, the temperature of the carbon fiber prepreg 5 is gradually increased, the temperature of the carbon fiber prepreg 5 reaches 48 ℃ when the temperature probe observes that the current frequency is regulated to the upper limit of 100KHz, the current is regulated at the moment, the current is increased by 2A per minute from 8A, and the temperature of the carbon fiber prepreg 5 reaches about 220 ℃ when the current is 48A, and the temperature is kept for 10 minutes.
Step 5; unloading and demolding are carried out,
after the solidification of the multi-layer carbon fiber prepreg 5 is completed, the parameters of the high-frequency pulse power supply 10 are turned off after being zeroed, the vacuum pump 11 is turned off after the parameters are naturally cooled to room temperature, the clamp 13 is taken down, the carbon fiber composite material combination unit 17 is taken out, and the contact part of the multi-layer carbon fiber prepreg 5 and the electrode 8 is cut off, so that the final carbon fiber composite material is obtained.
The natural cooling rate in this embodiment is 4 ℃/min.
The vacuum pump in this example is an electric vacuum pump, and the ultimate vacuum degree is-0.095 MPa.
The temperature probe is an infrared imaging temperature detector, the temperature measuring range is 0-400 ℃, and the placed height can observe the temperature distribution condition in the overall range of the carbon fiber prepreg.
The high-frequency pulse power supply can provide 0-10000A pulse current, the output frequency is 0-100KHz, the output duty ratio is 0-100% and the pulse form is one-way pulse or two-way pulse.
While the foregoing is directed to embodiments of the present application, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (9)
1. A method for forming a pulse current solidified carbon fiber composite material is characterized in that,
the forming method comprises a forming device, wherein the forming device comprises a rigid die with a flat surface, and a vacuum bag and a vacuumizing hose which are used for sealing and wrapping the rigid die, and the vacuum bag and the vacuumizing hose enable the inside of the forming device to be in a vacuum environment;
the forming device further comprises insulating cloth or insulating film, carbon fiber prepreg, airfelt, electrodes, wires, a high-frequency pulse power supply, a clamp, a rigid equalizing plate and a temperature probe, wherein one end of each wire is connected with the electrode, and the other end of each wire passes through the vacuum bag to be connected with the anode and the cathode of the high-frequency pulse power supply;
the molding steps are as follows:
step one: the material is cut and laid for preparation,
cutting out carbon fiber prepreg with required size and quantity, insulating cloth or insulating film with the size larger than that of the carbon fiber prepreg, isolating cloth or isolating film and airfelt,
the carbon fiber prepreg is a carbon fiber reinforced thermosetting resin prepreg, a carbon fiber reinforced thermoplastic resin prepreg, a dry carbon fiber and resin sheet or adhesive film;
step two: the material is laid down and then is put down,
sequentially laying an insulating cloth or an insulating film, an isolating cloth or an isolating film, carbon fiber prepreg and an electrode from the surface of the rigid die upwards, and placing the isolating cloth or the isolating film and the airfelt on the upper side of the electrode again from bottom to top to form a carbon fiber composite material combination unit; the electrodes are arranged at two ends of the carbon fiber prepreg in the length direction;
step three: the circuit is connected with and auxiliary equipment is arranged,
providing uniform auxiliary pressure on the carbon fiber composite material combination unit, providing pressing force at the electrode by adopting a clamp and a rigid equalizing plate, reducing contact resistance between the electrode and the carbon fiber composite material combination unit, and placing a temperature probe right above the carbon fiber composite material combination unit to assist temperature measurement;
step four: the electric parameters are input to heat and solidify,
setting initial current frequency and current magnitude in a high-frequency pulse power supply, adjusting the current magnitude or frequency according to the curing temperature curve requirement of the multi-layer carbon fiber prepreg and combining the temperature measured by a temperature probe, and preferentially adjusting the frequency of the high-frequency pulse to gradually increase the temperature of the multi-layer carbon fiber prepreg, wherein the multi-layer carbon fiber prepreg is insulated when the temperature reaches a proper temperature in the process;
step five: unloading and demolding are carried out,
and after the solidification of the multi-layer carbon fiber prepreg is finished, turning off the high-frequency pulse power supply after the parameters are zeroed, naturally cooling to room temperature, turning off the vacuum pump, taking down the clamp, taking out the carbon fiber composite material combination unit, and cutting off the contact part of the multi-layer carbon fiber prepreg and the electrode to obtain the final carbon fiber composite material.
2. The method for forming a pulse current cured carbon fiber composite material according to claim 1, wherein,
the width of the electrode is 10-30 mm.
3. The method for forming a pulse current cured carbon fiber composite according to claim 1, wherein the rigid mold is a metal plate with high rigidity such as heat-resistant glass, quartz stone and aluminum plate.
4. The method of forming a pulse current cured carbon fiber composite according to claim 1, wherein when the rigid mold is made of a nonmetallic material, no insulating layer is required.
5. The method for forming a pulse current cured carbon fiber composite material according to claim 1, wherein the airfelt is a high temperature resistant polyester fiber material, and a ventilation layer is formed on the upper layer of the composite material to prevent a false vacuum state during vacuum sealing.
6. The method of forming a pulse current cured carbon fiber composite material according to claim 1, wherein the vacuum pump is an apparatus capable of providing a negative pressure of not less than 0.09 Mpa.
7. The method of forming a pulse current cured carbon fiber composite according to claim 1, wherein the wire has a cross-sectional area of greater than 60mm 2 The multi-strand flexible lead of (2) is connected with the electrode by adopting a welding or clamping fixing mode.
8. The method of claim 1, wherein the temperature probe is capable of measuring the temperature in a range of not less than 0 ℃ to 400 ℃ and the measuring area covers at least the whole carbon fiber composite unit.
9. The method for forming a pulse current solidified carbon fiber composite material according to claim 1, wherein the high-frequency pulse current is one of positive pulse, negative pulse and bidirectional pulse, the pulse frequency is continuously adjustable, the highest pulse frequency is not lower than 100KHz, the pulse current is continuously adjustable from zero, and the maximum current is not lower than 200A.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4147488A (en) * | 1976-04-21 | 1979-04-03 | Saint-Gobain Industries | High frequency apparatus for forming structural shapes |
| CN1544238A (en) * | 2003-11-17 | 2004-11-10 | 中国航空工业第一集团公司北京航空材 | Self-resistance heating forming method for carbon fiber reinforced composite material |
| CN101845606A (en) * | 2010-06-22 | 2010-09-29 | 哈尔滨工业大学 | Method fur forming aluminum base composite material thin wall part by current self-resistance heating |
| CN104321373A (en) * | 2012-03-29 | 2015-01-28 | 三菱丽阳株式会社 | Carbon fibre thermoplastic resin prepreg, carbon fibre composite material and manufacturing method |
| CN105479768A (en) * | 2015-11-23 | 2016-04-13 | 西北工业大学 | Self-resistance electric heating curing method for resin-based carbon fiber composite material |
| CN106671451A (en) * | 2016-06-08 | 2017-05-17 | 中国科学院苏州纳米技术与纳米仿生研究所 | Fiber reinforced composite as well as preparing method and application thereof |
| CN106738523A (en) * | 2016-12-27 | 2017-05-31 | 北京航空航天大学 | The resistance heating quick molding method of long fibre and continuous fiber reinforced thermoplastic composite material |
| CN107662303A (en) * | 2017-10-16 | 2018-02-06 | 南京航空航天大学 | A kind of carbon fiber enhancement resin base composite material integrates electrical loss curing |
| CN109401320A (en) * | 2018-09-13 | 2019-03-01 | 沈阳理工大学 | The poly- aryl ethane of electronic beam curing/heat vulcanized silicone rubber composite material method |
| CN109878106A (en) * | 2019-01-30 | 2019-06-14 | 南京航空航天大学 | A kind of polymer matrix composites based on dynamic thermodynamic barrier are heating and curing method |
| CN110139743A (en) * | 2016-10-27 | 2019-08-16 | 鲁格瑞士公司 | Fiber-reinforced polymer manufacture |
| CN113696513A (en) * | 2021-09-03 | 2021-11-26 | 上海交通大学 | Carbon nano material-based non-autoclave electroformed composite material method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10285219B2 (en) * | 2014-09-25 | 2019-05-07 | Aurora Flight Sciences Corporation | Electrical curing of composite structures |
| US10946592B2 (en) * | 2016-09-11 | 2021-03-16 | Impossible Objects, Inc. | Resistive heating-compression method and apparatus for composite-based additive manufacturing |
-
2022
- 2022-03-02 CN CN202210202482.3A patent/CN114571747B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4147488A (en) * | 1976-04-21 | 1979-04-03 | Saint-Gobain Industries | High frequency apparatus for forming structural shapes |
| CN1544238A (en) * | 2003-11-17 | 2004-11-10 | 中国航空工业第一集团公司北京航空材 | Self-resistance heating forming method for carbon fiber reinforced composite material |
| CN101845606A (en) * | 2010-06-22 | 2010-09-29 | 哈尔滨工业大学 | Method fur forming aluminum base composite material thin wall part by current self-resistance heating |
| CN104321373A (en) * | 2012-03-29 | 2015-01-28 | 三菱丽阳株式会社 | Carbon fibre thermoplastic resin prepreg, carbon fibre composite material and manufacturing method |
| CN105479768A (en) * | 2015-11-23 | 2016-04-13 | 西北工业大学 | Self-resistance electric heating curing method for resin-based carbon fiber composite material |
| CN106671451A (en) * | 2016-06-08 | 2017-05-17 | 中国科学院苏州纳米技术与纳米仿生研究所 | Fiber reinforced composite as well as preparing method and application thereof |
| CN110139743A (en) * | 2016-10-27 | 2019-08-16 | 鲁格瑞士公司 | Fiber-reinforced polymer manufacture |
| CN106738523A (en) * | 2016-12-27 | 2017-05-31 | 北京航空航天大学 | The resistance heating quick molding method of long fibre and continuous fiber reinforced thermoplastic composite material |
| CN107662303A (en) * | 2017-10-16 | 2018-02-06 | 南京航空航天大学 | A kind of carbon fiber enhancement resin base composite material integrates electrical loss curing |
| CN109401320A (en) * | 2018-09-13 | 2019-03-01 | 沈阳理工大学 | The poly- aryl ethane of electronic beam curing/heat vulcanized silicone rubber composite material method |
| CN109878106A (en) * | 2019-01-30 | 2019-06-14 | 南京航空航天大学 | A kind of polymer matrix composites based on dynamic thermodynamic barrier are heating and curing method |
| CN113696513A (en) * | 2021-09-03 | 2021-11-26 | 上海交通大学 | Carbon nano material-based non-autoclave electroformed composite material method |
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