CN117532996A - Preparation method and preparation device of graphene-aluminum-based composite material - Google Patents
Preparation method and preparation device of graphene-aluminum-based composite material Download PDFInfo
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- CN117532996A CN117532996A CN202311372287.6A CN202311372287A CN117532996A CN 117532996 A CN117532996 A CN 117532996A CN 202311372287 A CN202311372287 A CN 202311372287A CN 117532996 A CN117532996 A CN 117532996A
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 96
- 239000002131 composite material Substances 0.000 title claims abstract description 55
- 238000002360 preparation method Methods 0.000 title claims abstract description 48
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 57
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 51
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 51
- 238000003756 stirring Methods 0.000 claims abstract description 44
- 238000003466 welding Methods 0.000 claims abstract description 43
- 238000003475 lamination Methods 0.000 claims abstract description 5
- 230000007246 mechanism Effects 0.000 claims description 83
- 239000000758 substrate Substances 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 abstract description 18
- 238000000034 method Methods 0.000 abstract description 17
- 238000009826 distribution Methods 0.000 abstract description 6
- 238000004663 powder metallurgy Methods 0.000 abstract description 6
- 239000007790 solid phase Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 32
- 230000008569 process Effects 0.000 description 6
- 239000012071 phase Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000002277 temperature effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011156 metal matrix composite Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/0076—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised in that the layers are not bonded on the totality of their surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/42—Alternating layers, e.g. ABAB(C), AABBAABB(C)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention relates to the field of solid phase connection, and discloses a preparation method and a preparation device of a graphene-aluminum-based composite material, wherein the preparation device is suitable for the preparation method. The preparation method comprises the following steps: alternately stacking the aluminum base layer and the graphene layer, and enabling two layers at two ends in the stacking direction to be aluminum base layers to obtain a stacking blank; applying preset pressure to the laminated blank along the lamination direction of the aluminum base layer and the graphene layer so as to enable the adjacent aluminum base layer and the adjacent graphene layer to be bonded; and thirdly, applying ultrasonic vibration to the laminated blank, and carrying out friction stir welding on the aluminum base layer and the graphene layer. Compared with a powder metallurgy method, the graphene-aluminum-based composite material prepared by friction stir welding and ultrasonic vibration under a certain pressure is more uniform in distribution of graphene in an aluminum matrix and better in mechanical property.
Description
Technical Field
The invention relates to the field of solid phase connection, in particular to a preparation method and a preparation device of a graphene-aluminum-based composite material.
Background
The metal matrix composite has the advantages of high specific strength, high toughness, good wear resistance, excellent electric and heat conductivity, good designability and the like, and is widely applied to the fields of aerospace, transportation, electronic information and the like. The aluminum-based composite material is the most widely applied metal-based composite material in the aerospace field at present due to the advantages of light weight, high strength, corrosion resistance, wear resistance and the like. However, technological progress and changes in the service environment of the materials place higher demands on the properties of aluminum-based composites, which are difficult to meet with the conventional ceramic particle reinforced aluminum-based composites, and development of high-performance aluminum-based composites is urgently required.
Aluminum-based composites are generally composed of two parts, an aluminum or aluminum alloy matrix and a reinforcing phase. The type, size, distribution, content, and interface between the reinforcement phase and the aluminum matrix are the primary factors determining the performance of the aluminum-based composite, and therefore, the selection of reinforcement phase is extremely important for the preparation of high performance aluminum-based composites. In engineering, graphene with ultra-low density, ultra-high strength and good flexibility is generally selected as an ideal reinforcement for aluminum-based composites. However, graphene is easy to agglomerate, and weak bonding is formed between graphene and an aluminum matrix, so that in order to effectively improve dispersibility of graphene in the aluminum matrix and interface bonding between graphene and aluminum matrix, researchers have developed various preparation methods. At present, a powder metallurgy method is mainly adopted to prepare the graphene aluminum matrix composite material, but the method still has the problem of poor uniformity of graphene distribution in an aluminum matrix.
Therefore, how to make the distribution of graphene in the aluminum matrix more uniform is a problem to be solved by those skilled in the art.
Disclosure of Invention
In order to solve the technical problems, the invention provides a preparation method and a preparation device of a graphene-aluminum-based composite material, which can enable graphene to be distributed in an aluminum matrix more uniformly.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides a preparation method of a graphene-aluminum-based composite material, which comprises the following steps:
alternately stacking an aluminum base layer and a graphene layer, wherein two layers positioned at two ends of the stacking direction are both aluminum base layers, so as to obtain a stacking blank;
applying preset pressure to the laminated blank along the lamination direction of the aluminum substrate and the graphene layer so as to enable the adjacent aluminum substrate and the adjacent graphene layer to be bonded;
and thirdly, applying ultrasonic vibration to the laminated blank, and carrying out friction stir welding on the aluminum base layer and the graphene layer.
The invention also provides a preparation device of the graphene-aluminum-based composite material, which is suitable for the preparation method of the graphene-aluminum-based composite material, and comprises the following steps:
a pressing mechanism for applying the pressing force to the laminated blank;
an ultrasonic vibration mechanism for applying ultrasonic vibration to the laminated blank;
and a friction stir welding mechanism for friction stir welding the laminated blank.
Optionally, the ultrasonic vibration mechanism comprises an ultrasonic generator, an ultrasonic transducer and a vibration head which are sequentially connected.
Optionally, the graphene-aluminum-based composite material preparation device further comprises a control element and a sensor, wherein the sensor is used for monitoring the output frequency of the vibrating head, and the sensor and the ultrasonic generator are both in communication connection with the control element.
Optionally, the graphene-aluminum-based composite material preparation device further comprises a driving mechanism, wherein the driving mechanism is connected with the ultrasonic vibration mechanism and the friction stir welding mechanism so as to drive the ultrasonic vibration mechanism and the friction stir welding mechanism to move.
Optionally, the driving mechanism includes a first linear driver and a second linear driver that are perpendicular to each other, the first linear driver is connected with the second linear driver to drive the second linear driver to move, the second linear driver is connected with the ultrasonic vibration mechanism and the friction stir welding mechanism to drive the ultrasonic vibration mechanism and the friction stir welding mechanism to move, and the movement directions of the ultrasonic vibration mechanism and the friction stir welding mechanism are perpendicular to the movement directions of the second linear driver.
Optionally, the driving mechanism further comprises a supporting table;
the first linear driver comprises two first lead screws and two first motors, the two first motors are respectively connected with the two first lead screws so as to respectively drive the two first lead screws to rotate, the two first lead screws are respectively arranged on two opposite sides of the supporting table, and each first lead screw is axially positioned and is rotationally connected with the supporting table;
the second linear driver comprises two second lead screws, two second motors, two guide rails, two sliding blocks and a connecting structure, wherein the two second lead screws are axially positioned and respectively connected with the two guide rails in a rotating way, the axial direction of the second lead screws is parallel to the length direction of the guide rails, the axial direction of the second lead screws is perpendicular to the axial direction of the first lead screws, the two second motors are respectively connected with the two second lead screws so as to respectively drive the two second lead screws to rotate, the two sliding blocks are respectively connected with the two guide rails in a sliding way, the two sliding blocks are respectively sleeved on the two second lead screws and respectively connected with the two second lead screws in a threaded way, the two sliding blocks are connected through the connecting structure, and the ultrasonic vibration mechanism and the stirring friction welding mechanism are respectively connected with the connecting structure;
the two first lead screws respectively penetrate through the two guide rails, the two guide rails are respectively in threaded connection with the two first lead screws, guide blocks are arranged on the two guide rails, two guide grooves are oppositely formed in two opposite sides of the supporting table, the two guide blocks are respectively in sliding connection with the two guide grooves, and the length direction of the guide grooves is parallel to the axis direction of the first lead screws.
Optionally, the graphene-aluminum-based composite material preparation device further comprises a first positioning clamp, a second positioning clamp, a first connecting plate, a second connecting plate, an intermediate connecting piece, a bolt and a nut;
the ultrasonic vibration mechanism is positioned and clamped between the first positioning clamp and the second positioning clamp, and the first positioning clamp and the second positioning clamp can be detachably connected;
the first connecting plate with the second connecting plate is parallel and set up relatively, first connecting plate with the second linear drive links to each other, the second connecting plate passes through intermediate junction with first positioning fixture or second positioning fixture links to each other, be provided with on the second connecting plate and link up the groove, the one end of bolt passes in proper order link up the groove with the second connecting plate, and pass through the nut fastening, and the bolt with link up groove sliding connection.
Optionally, two opposite side walls of the through groove are of a zigzag structure.
Optionally, the pressurizing mechanism includes two clamping plates and two third linear drivers, two third linear drivers are respectively connected with two clamping plates, and two third linear drivers are respectively used for driving two clamping plates to be far away from or close to each other along the stacking direction of the aluminum substrate and the graphene layer.
Compared with the prior art, the invention has the following technical effects:
compared with the preparation method of the graphene-aluminum-based composite material by adopting the powder metallurgy method, the preparation method of the graphene-aluminum-based composite material not only solves the problem that adverse interface reaction is easy to occur between graphene and an aluminum matrix by adopting the powder metallurgy method, improves the mechanical property of the graphene-aluminum-based composite material, but also can refine grains through temperature effect, vibration effect and severe plastic deformation, and can enable graphene to be dispersed more through ultrasonic vibration, so that the distribution uniformity of a graphene reinforcing phase in an aluminum matrix is better, the optimization of tissues and performances is realized, and the strength and toughness of the graphene-aluminum-based composite material are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a laminated blank provided in an embodiment of the present invention;
FIG. 2 is a schematic view of an arrangement of stacked blank clamping plates provided in an embodiment of the invention;
fig. 3 is a perspective view of a graphene-aluminum-based composite material preparation device provided in an embodiment of the present invention;
fig. 4 is a front view of a graphene-aluminum-based composite material preparation apparatus provided in an embodiment of the present invention;
fig. 5 is a side view of a graphene-aluminum-based composite material preparation apparatus provided in an embodiment of the present invention.
Fig. 1-5 reference numerals illustrate: 1. stacking the blanks; 101. an aluminum base layer; 102. a graphene layer; 2. a bolt; 3. a clamping plate; 4. a first connection plate; 5. an ultrasonic generator; 6. an ultrasonic transducer; 7. a sensor; 8. a slide block; 9. a second connecting plate; 901. a through groove; 10. a guide rail; 11. a second lead screw; 12. a first positioning clamp; 13. a second motor; 14. a friction stir welding mechanism; 1401. a stirring pin; 15. a second positioning jig; 16. an intermediate connection; 17. a vibrating head; 18. a connection structure; 19. a support table; 1901. a guide groove; 20. a first lead screw; 21. a first motor.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a preparation method and a preparation device of a graphene-aluminum-based composite material, which can enable graphene to be distributed in an aluminum matrix more uniformly.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Referring to fig. 1 to 5, the preparation method of the graphene-aluminum-based composite material provided by the embodiment of the invention comprises the following steps:
step one, as shown in fig. 1, alternately stacking an aluminum base layer 101 and a graphene layer 102, and making both layers located at both ends in the stacking direction be aluminum base layers 101 to obtain a stacked blank 1;
step two, applying preset pressure to the laminated blank 1 along the lamination direction of the aluminum base layer 101 and the graphene layer 102 so as to enable the adjacent aluminum base layer 101 and the adjacent graphene layer 102 to be bonded;
step three, ultrasonic vibration is applied to the laminated blank 1, and friction stir welding is performed on the aluminum substrate 101 and the graphene layer 102. The purpose of friction stir welding is to disperse the graphene in the graphene layer 102 in the aluminum substrate 101, and connect the layers of the laminated blank 1 together to form a whole, and how to achieve this is well known to those skilled in the art and will not be described in detail herein. In addition, the preset pressure applied in the second step is not removed during friction stir welding, and the preset pressure is still applied to the laminated blank 1 during the whole welding process.
Compared with the method for preparing the graphene-aluminum-based composite material by adopting the powder metallurgy method, the method for preparing the graphene-aluminum-based composite material not only solves the problem that poor interface reaction is easy to occur between graphene and an aluminum matrix by adopting the powder metallurgy method, improves the mechanical property of the graphene-aluminum-based composite material, but also can refine grains through temperature effect, vibration effect and severe plastic deformation, ensures that the distribution uniformity of a graphene reinforced phase in an aluminum matrix is better, realizes optimization of tissues and performances, and improves the strength and toughness of the graphene-aluminum-based composite material.
It should be noted that the aluminum base layer 101 is made of an aluminum base, such as an aluminum alloy or aluminum, and the graphene layer 102 is made of a graphene material. The number of layers of the aluminum base layer 101 and the graphene layer 102 is determined according to actual needs, the thicknesses of the aluminum base layer 101 and the graphene layer 102 are related to the proportion of graphene and aluminum matrix in the graphene-aluminum matrix composite material, and the amounts of the graphene and the aluminum matrix required by different proportions are different.
In addition, the frequency of the ultrasonic vibration during the processing and the magnitude of the preset pressure applied to the laminated blank 1 are optimized according to the thickness of the laminated blank 1, and how to optimize them is well known in the art, and is not an important point of protection of the present invention, and will not be described in detail herein. The preparation method of the graphene-aluminum-based composite material provided by the embodiment of the invention has the advantages of reasonable design, simple process and stable control, effectively solves the limitations existing in the preparation process of the graphene-aluminum-based composite material, and provides an effective method for realizing the production target of material preparation and performance improvement integrated formation.
Referring to fig. 1 to 5, the embodiment of the invention further provides a preparation device of a graphene-aluminum-based composite material, which is suitable for the preparation method of the graphene-aluminum-based composite material, and comprises:
a pressing mechanism for applying a preset pressure to the laminated blank 1;
an ultrasonic vibration mechanism for applying ultrasonic vibration to the laminated blank 1;
a friction stir welding mechanism 14 for friction stir welding the laminated blank 1.
As an alternative embodiment, as shown in fig. 3, the ultrasonic vibration mechanism includes an ultrasonic generator 5, an ultrasonic transducer 6, and a vibration head 17, which are connected in this order. Further, the graphene-aluminum-based composite material preparation device further comprises a control element and a sensor 7, wherein the sensor 7 is used for monitoring the output frequency of the vibration head 17, the sensor 7 is in communication connection with the control element so as to transmit the monitored output frequency information of the vibration head 17 to the control element, and the control element is in communication connection with the ultrasonic generator 5 so as to control the ultrasonic generator 5 to work according to the monitored output frequency information of the vibration head 17 monitored by the sensor 7.
In a specific use process, the ultrasonic generator 5 generates an alternating current signal with ultrasonic frequency, the alternating current signal is converted into mechanical vibration by the ultrasonic transducer 6, and the mechanical vibration is transmitted to the laminated blank 1 by the vibration head 17 after monitoring and feedback adjustment by the sensor 7.
The frequency adjustment range of the ultrasonic generator 5 is, for example, 20kHz-100kHz, and the control element is, for example, a controller, more specifically, a PLC controller, for example.
As an alternative embodiment, the graphene-aluminum-based composite material preparing apparatus further includes a driving mechanism connected to the ultrasonic vibration mechanism and the friction stir welding mechanism 14 to drive the ultrasonic vibration mechanism and the friction stir welding mechanism 14 to move, e.g., rotate and/or move in a linear direction.
Specifically, as shown in fig. 3, the driving mechanism includes a first linear driver and a second linear driver that are perpendicular to each other, the first linear driver is connected to the second linear driver to drive the second linear driver to move, the second linear driver is connected to the ultrasonic vibration mechanism and the friction stir welding mechanism 14 to drive the ultrasonic vibration mechanism and the friction stir welding mechanism 14 to move, and the movement directions of the ultrasonic vibration mechanism and the friction stir welding mechanism 14 are perpendicular to the movement directions of the second linear driver.
More specifically, as shown in fig. 3, the driving mechanism provided in this embodiment further includes a support table 19, the first linear drive includes two first lead screws 20 and two first motors 21, the two first motors 21 are respectively connected with the two first lead screws 20 to respectively drive the two first lead screws 20 to rotate, the two first lead screws 20 are respectively disposed at two opposite sides of the support table 19, and each first lead screw 20 is axially positioned and is rotationally connected with the support table 19.
As shown in fig. 3, the second linear drive comprises two second lead screws 11, two second motors 13, two guide rails 10, two sliders 8 and a connection structure 18, for example a connection plate, 18. The two second lead screws 11 are axially positioned, the two second lead screws 11 are respectively and rotatably connected with the two guide rails 10, the axial direction of the second lead screws 11 is parallel to the length direction of the guide rails 10, the axial line of the second lead screws 11 is perpendicular to the axial line of the first lead screws 20, the two second motors 13 are respectively connected with the two second lead screws 11 to respectively drive the two second lead screws 11 to rotate, the two sliding blocks 8 are respectively and slidably connected with the two guide rails 10, the two sliding blocks 8 are respectively sleeved on the two second lead screws 11 and are respectively and rotatably connected with the two second lead screws 11, the two sliding blocks 8 are connected through a connecting structure 18, and the ultrasonic vibration mechanism and the friction stir welding mechanism 14 are respectively connected with the connecting structure 18. In the specific use process, the second motor 13 rotates, the sliding block 8 moves along the axis direction of the second screw rod 11, and then the connecting structure 18, the ultrasonic vibration mechanism and the friction stir welding mechanism 14 arranged on the connecting structure 18 are driven to synchronously move, so that the positions of the ultrasonic vibration mechanism and the friction stir welding mechanism 14 are adjusted.
As shown in fig. 3, the two first lead screws 20 respectively pass through the two guide rails 10, and the two guide rails 10 are respectively in threaded connection with the two first lead screws 20, guide blocks are respectively arranged on the two guide rails 10, two guide grooves 1901 are oppositely arranged on two opposite sides of the supporting table 19, the two guide blocks are respectively in sliding connection with the two guide grooves 1901, and the length direction of the guide grooves 1901 is parallel to the axis direction of the first lead screws 20. In a specific use process, the first motor 21 rotates to drive the first screw rod 20 to synchronously rotate, and along with the rotation of the first screw rod 20, the guide rail 10 moves along the axial direction of the first screw rod 20, so that the ultrasonic vibration mechanism and the friction stir welding mechanism 14 are driven to synchronously move, and the positions of the ultrasonic vibration mechanism and the friction stir welding mechanism 14 are adjusted.
It should be noted that, the axial positioning means that the first lead screw 20 cannot move along the axial direction thereof, and the first linear driver and the second linear driver can realize the adjustment of the positions of the ultrasonic vibration mechanism and the friction stir welding mechanism 14 in two directions perpendicular to each other, in this embodiment, the two directions are perpendicular to the stacking direction of the stacked blank 1, and the ultrasonic vibration mechanism is disposed in front of the friction stir welding mechanism 14, so as to implement the application of ultrasonic vibration to the stacked blank 1, and then perform friction stir welding on the aluminum substrate 101 and the graphene layer 102, and in the specific preparation process, the stacked blank 1 is supported on the support table 19 and is located between the support table 19 and the vibration head 17 of the ultrasonic vibration mechanism and the stirring pin 1401 of the friction stir welding mechanism 14, and the specific structure of the friction stir welding mechanism 14 belongs to the prior art, which is not repeated herein.
Further, as shown in fig. 4 to 5, the graphene-aluminum-based composite material preparation device further comprises a first positioning clamp 12, a second positioning clamp 15, a first connecting plate 4, a second connecting plate 9, an intermediate connecting piece 16, a bolt 2 and a nut.
Wherein the ultrasonic vibration mechanism is positioned and clamped between the first positioning jig 12 and the second positioning jig 15, and the first positioning jig 12 and the second positioning jig 15 are detachably connected. In the present embodiment, specifically, the first positioning jig 12 and the second positioning jig 15 are used for positioning and clamping the vibrating head 17 of the ultrasonic vibration mechanism, the sensor 7 is provided on the vibrating head 17, and the shape of the first positioning jig 12 and the second positioning jig 15 is matched with the shape of the outer side wall of the vibrating head 17.
The first connecting plate 4 and the second connecting plate 9 are parallel and oppositely arranged, the first connecting plate 4 is connected with the second linear driver, the second connecting plate 9 is connected with the first positioning clamp 12 or the second positioning clamp 15 through the middle connecting piece 16, the second connecting plate 9 is provided with a through groove 901, one end of the bolt 2 sequentially penetrates through the through groove 901 and the second connecting plate 9 and is fastened through a nut, and the bolt 2 is in sliding connection with the through groove 901. By setting the positions of the adjusting bolts 2 in the through grooves 901, the relative positions of the first connecting plate 4 and the second connecting plate 9 can be adjusted, and fine adjustment of the installation positions of the ultrasonic vibration mechanism and the friction stir welding mechanism 14 can be further realized.
Further, in order to avoid the relative movement of the first connecting plate 4 and the second connecting plate 9 under the influence of ultrasound, the two opposite side walls of the through groove are of a saw-tooth structure.
As an alternative embodiment, as shown in fig. 2, the pressurizing mechanism includes two clamping plates 3 and two third linear drivers, which are respectively connected to the two clamping plates 3, and which are respectively used to drive the two clamping plates 3 away from or toward each other in the lamination direction of the aluminum base layer 101 and the graphene layer 102, and the third linear drivers are, for example, hydraulic cylinders.
In the specific use process, the interlayer pressure of the laminated blank 1 can be adjusted by adjusting the distance between the two clamping plates 3, and the laminated blank 1 can obtain the graphene aluminum-based composite material with excellent structure and performance under the action of thermal acoustic multi-field coupling.
The principles and embodiments of the present invention have been described in this specification with reference to specific examples, the description of which is only for the purpose of aiding in understanding the method of the present invention and its core ideas; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (10)
1. The preparation method of the graphene-aluminum-based composite material is characterized by comprising the following steps of:
alternately stacking an aluminum base layer and a graphene layer, wherein two layers positioned at two ends of the stacking direction are both aluminum base layers, so as to obtain a stacking blank;
applying preset pressure to the laminated blank along the lamination direction of the aluminum substrate and the graphene layer so as to enable the adjacent aluminum substrate and the adjacent graphene layer to be bonded;
and thirdly, applying ultrasonic vibration to the laminated blank, and carrying out friction stir welding on the aluminum base layer and the graphene layer.
2. A graphene-aluminum-based composite material preparation apparatus suitable for the graphene-aluminum-based composite material preparation method of claim 1, characterized by comprising:
a pressing mechanism for applying the pressing force to the laminated blank;
an ultrasonic vibration mechanism for applying ultrasonic vibration to the laminated blank;
and a friction stir welding mechanism for friction stir welding the laminated blank.
3. The graphene-based composite material preparation device according to claim 2, wherein the ultrasonic vibration mechanism comprises an ultrasonic generator, an ultrasonic transducer and a vibration head which are sequentially connected.
4. The graphene-based composite material preparation device according to claim 3, further comprising a control element and a sensor for monitoring the output frequency of the vibrating head, the sensor and the ultrasonic generator being both in communication with the control element.
5. The graphene-based composite material preparation device according to claim 2, further comprising a driving mechanism connected to both the ultrasonic vibration mechanism and the friction stir welding mechanism to drive the ultrasonic vibration mechanism and the friction stir welding mechanism to move.
6. The graphene-aluminum-based composite material preparation device according to claim 5, wherein the driving mechanism comprises a first linear driver and a second linear driver which are perpendicular to each other, the first linear driver is connected with the second linear driver to drive the second linear driver to move, the second linear driver is connected with the ultrasonic vibration mechanism and the friction stir welding mechanism to drive the ultrasonic vibration mechanism and the friction stir welding mechanism to move, and the movement directions of the ultrasonic vibration mechanism and the friction stir welding mechanism are perpendicular to the movement directions of the second linear driver.
7. The graphene-based composite material preparation device according to claim 6, wherein the driving mechanism further comprises a support table;
the first linear driver comprises two first lead screws and two first motors, the two first motors are respectively connected with the two first lead screws so as to respectively drive the two first lead screws to rotate, the two first lead screws are respectively arranged on two opposite sides of the supporting table, and each first lead screw is axially positioned and is rotationally connected with the supporting table;
the second linear driver comprises two second lead screws, two second motors, two guide rails, two sliding blocks and a connecting structure, wherein the two second lead screws are axially positioned and respectively connected with the two guide rails in a rotating way, the axial direction of the second lead screws is parallel to the length direction of the guide rails, the axial direction of the second lead screws is perpendicular to the axial direction of the first lead screws, the two second motors are respectively connected with the two second lead screws so as to respectively drive the two second lead screws to rotate, the two sliding blocks are respectively connected with the two guide rails in a sliding way, the two sliding blocks are respectively sleeved on the two second lead screws and respectively connected with the two second lead screws in a threaded way, the two sliding blocks are connected through the connecting structure, and the ultrasonic vibration mechanism and the stirring friction welding mechanism are respectively connected with the connecting structure;
the two first lead screws respectively penetrate through the two guide rails, the two guide rails are respectively in threaded connection with the two first lead screws, guide blocks are arranged on the two guide rails, two guide grooves are oppositely formed in two opposite sides of the supporting table, the two guide blocks are respectively in sliding connection with the two guide grooves, and the length direction of the guide grooves is parallel to the axis direction of the first lead screws.
8. The graphene-based composite material preparation device according to claim 6, further comprising a first positioning jig, a second positioning jig, a first connection plate, a second connection plate, an intermediate connection piece, a bolt, and a nut;
the ultrasonic vibration mechanism is positioned and clamped between the first positioning clamp and the second positioning clamp, and the first positioning clamp and the second positioning clamp can be detachably connected;
the first connecting plate with the second connecting plate is parallel and set up relatively, first connecting plate with the second linear drive links to each other, the second connecting plate passes through intermediate junction with first positioning fixture or second positioning fixture links to each other, be provided with on the second connecting plate and link up the groove, the one end of bolt passes in proper order link up the groove with the second connecting plate, and pass through the nut fastening, and the bolt with link up groove sliding connection.
9. The graphene-aluminum-based composite material preparation device according to claim 8, wherein two opposite side walls of the through groove are of a zigzag structure.
10. The graphene-aluminum-based composite material preparation device according to claim 2, wherein the pressurizing mechanism comprises two clamping plates and two third linear drivers, the two third linear drivers are respectively connected with the two clamping plates, and the two third linear drivers are respectively used for driving the two clamping plates to be far away from or close to each other along the stacking direction of the aluminum-based layer and the graphene layer.
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