CN116277993A - Continuous induction welding device and method for metal and carbon fiber composite material - Google Patents
Continuous induction welding device and method for metal and carbon fiber composite material Download PDFInfo
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- CN116277993A CN116277993A CN202310281697.3A CN202310281697A CN116277993A CN 116277993 A CN116277993 A CN 116277993A CN 202310281697 A CN202310281697 A CN 202310281697A CN 116277993 A CN116277993 A CN 116277993A
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- 238000003466 welding Methods 0.000 title claims abstract description 151
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 86
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 86
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 57
- 239000002184 metal Substances 0.000 title claims abstract description 57
- 230000006698 induction Effects 0.000 title claims abstract description 47
- 239000002131 composite material Substances 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000001125 extrusion Methods 0.000 claims abstract description 66
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000004033 plastic Substances 0.000 claims abstract description 16
- 230000009471 action Effects 0.000 claims abstract description 13
- 230000009545 invasion Effects 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 10
- 238000009792 diffusion process Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 21
- 238000005096 rolling process Methods 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 238000004021 metal welding Methods 0.000 claims description 4
- 230000005674 electromagnetic induction Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
- B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
- B29C65/30—Electrical means
- B29C65/32—Induction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
- B29L2007/002—Panels; Plates; Sheets
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention relates to a continuous induction welding device and method for a metal and carbon fiber composite material, and belongs to the field of welding processes and equipment. The metal part of the joint is heated through electromagnetic induction, and the metal and carbon fiber plates reach a set temperature state under the action of heat conduction; when the welding position reaches enough temperature rise, plastic deformation, mutual invasion and atomic diffusion at the interface are started under the action of the extrusion force of the upper and lower extrusion wheels, and the invasion teeth on the surface of the metal plate are inserted into the carbon fiber plate, so that the orderly and controllable deformation of the carbon fiber material at the welding position is ensured. After the joint is cooled, a composite type connecting joint with a welding component and a mechanical fixing component is formed, so that the high-efficiency and high-performance connection of the metal-carbon fiber composite material plate is realized. The method can realize double-layer lap welding of the metal-carbon fiber plate and can also realize three-layer edge-covering welding of the metal-carbon fiber plate and the metal.
Description
Technical Field
The invention relates to the field of welding technology and equipment, in particular to a continuous induction welding technology for metal-carbon fiber composite plates, and particularly relates to a continuous induction welding device and method for metal and carbon fiber composite plates.
Background
The carbon fiber composite material is used as a novel light engineering material, has obvious performance advantages in a plurality of light materials, has lower density, higher strength and more excellent specific strength, specific modulus and specific energy absorption, and has wide application prospect in the aspects of aerospace, rail transportation, automobile light weight and the like. However, in the mechanical products of many products at present, the pure carbon fiber composite structure still has defects in terms of aging resistance, abrasion resistance, service life and the like, so the metal-carbon fiber composite structure still has the main stream design thought at present.
In the field of metal-carbon fiber material joining, bonding, mechanical joining and welding are generally performed. The bonding structure is low in connection strength, is easily influenced by environmental temperature, illumination and the like in the using process, and is high in failure risk. While mechanical connection can realize high-strength connection, the mechanical connection is generally carried out by adopting fasteners such as bolts, rivets and the like, the connection parts are isolated, stress concentration exists during bearing, and the fatigue resistance performance is insufficient. Thus, the welding method is still an indisputable choice for the large-size, continuous metal-carbon fiber material connection requirements. Because of the great performance difference between the carbon fiber material and the metal material in the aspects of physics, chemistry and the like, the traditional welding method has the defects in the aspects of joint forming stability, joint defect control and mechanical property, and a novel welding process is urgently needed to solve the requirement.
Disclosure of Invention
The invention aims to provide a continuous induction welding device and method for metal and carbon fiber composite materials, which solve the defects of isolated welding spots, low forming efficiency and the like in the existing connecting process. According to the invention, the metal part of the joint is heated through electromagnetic induction, and the metal and carbon fiber plates reach a set temperature state under the action of heat conduction; under the action of the upper extrusion wheel and the lower extrusion wheel, the metal and the carbon fiber plate generate specific plastic deformation, mutual invasion and atomic diffusion at the interface; after the joint is cooled, a composite type connecting joint with a welding component and a mechanical fixing component is formed, so that the high-efficiency and high-performance connection of the metal-carbon fiber composite material plate is realized.
The above object of the present invention is achieved by the following technical solutions:
continuous induction welding device for metal and carbon fiber composite material: the welding machine comprises a welding machine head 1, a welding machine body 2 and a linear guide rail 3, wherein the welding machine head 1 is divided into an upper group and a lower group, and the upper group and the lower group are respectively fixed with the welding machine body 2 through fasteners; in the welding process, an upper welding machine head and a lower welding machine head carry out induction heating on a workpiece formed by overlapping a metal plate and a carbon fiber plate, namely a joint to-be-welded area, apply extrusion force, and fixedly connect high-temperature and plastic metal and carbon fiber composite materials in the to-be-welded area together; the welding machine body 2 can move along the linear guide rail 3 to drive the extrusion wheel 11 at the end part of the welding machine head 1 to roll and advance at the welding part of the workpiece, and repeatedly heat and extrude a new area to be welded; after the welding is completed, all the heated and extruded parts of the workpiece form a continuous composite joint with both welding components and mechanical fastening components.
The welding machine head 1 comprises a squeezing wheel 11, an induction coil 12, an electrode 13, a rolling bearing 14, an end cover 15, a hollow shaft 16, a connecting seat 17, a servo press 18, a soft copper belt 19 and a welding power supply 110, wherein the servo press 18 is fixed on a welding machine body 2, and the telescopic end of the servo press 18 is connected with the hollow shaft 16 through the connecting seat 17 and is responsible for providing extrusion force pointing to a workpiece; a rolling bearing 14 is arranged between the end cover 15 and the hollow shaft 16, the extrusion wheel 11 and the end cover 15 are connected together through a fastener, and the extrusion wheel is arranged at the front end of the hollow shaft 16 and can rotate relative to the hollow shaft 16;
the induction coil 12 is composed of a coil body 121 and a pantograph 122, and is uniformly distributed in the extrusion wheel 11 in an array; the axes of the induction coils 12 are coincident with the radius of the extrusion wheel 11, and during the rolling process of the extrusion wheel 11, each induction coil 12 rotates to the lower part of the electrode 13 in sequence, and the pantograph 122 is contacted with the conductive contact 135 of the electrode 13 to transmit heating current;
the electrode 13 is arranged in the hollow shaft 16, and the tail ends of the anode 131 and the cathode 132 of the electrode are respectively connected with the welding power supply 110 through a soft copper belt 19; an insulating plate 133 is arranged between the positive electrode 131 and the negative electrode 132 of the electrode, an insulating sleeve 134 with a notch and a conductive contact 135 are arranged at the front end of the electrode, and the insulating sleeve is in charge of contacting with the pantograph 122 of the induction coil 12 and conducting current.
Another object of the present invention is to provide a continuous induction welding method for metal and carbon fiber composite materials, wherein metal and carbon fiber composite material plates are assembled into a work piece with a lap joint structure and are placed between the extrusion wheels 11 of the upper and lower welding heads 1; the servo press 18 applies extrusion force to the workpiece through the connecting seat 17, the hollow shaft 16, the end cover 15 and the extrusion wheel 11; the extrusion wheel 11 rolls along the surface of the workpiece under the drive of the welder body 2; at any moment, the induction coil 12 is positioned at the connecting line position between the center of the extrusion wheel 11 and the surface of the workpiece, the pantograph 122 of the induction coil is contacted with the conductive contact 135 of the electrode 13, alternating current flows in the induction coil, and corresponding eddy current is induced on the surface of the metal workpiece, so that resistance heat is generated; when the metal and carbon fiber plates reach a certain temperature rise, the welding parts generate plastic deformation, mutual invasion and atomic diffusion at the interface under the action of extrusion force, and a permanent welding joint is formed after cooling.
The welding method can realize double-layer lap welding of metal and carbon fiber plates and can also realize metal-carbon fiber plates-metal three-layer edge-covering welding; when double-layer lap welding is carried out, the welding machine head 1 at the metal side simultaneously provides extrusion force and heating for the workpiece, the welding joint 1 at the carbon fiber plate side only provides extrusion force for the workpiece, and the heating of the carbon fiber plate is realized by heat conduction of the single-side metal plate; when three-layer edge-covering welding is carried out, the welding joints 1 on two sides simultaneously provide extrusion force and heating for a workpiece, and the heating of the carbon fiber plates is realized by heat conduction of the metal plates on two sides.
In the welding method, in order to realize the composite connection effect of welding components and mechanical connecting components, the metal plate is provided with invasion teeth, a flow guide surface and a filling cavity at the contact surface with the carbon fiber plate; when the welding part reaches enough temperature rise and begins to generate plastic deformation under the action of extrusion force, the invasion teeth on the surface of the metal plate are inserted into the carbon fiber plate, and the corresponding extrusion materials enter the filling cavity along the flow guide surface, so that the ordered and controllable plastic deformation of the carbon fiber material at the welding part is ensured; after cooling, the carbon fiber material and the metal form mechanical connection which is staggered with each other, all contact surfaces form welding connection, and finally, the permanent connection between the metal and the carbon fiber plate is realized.
The invention has the beneficial effects that: the continuous induction welding method for the metal-carbon fiber composite material can meet the permanent connection requirement of large-size plates of dissimilar materials of metal-carbon fiber plates, and realizes high-efficiency forming of long and large welding seams through continuous induction heating and rolling; the formed joint has welding connection components and mechanical fixing components, and has few forming defects and excellent mechanical properties.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate and explain the invention and together with the description serve to explain the invention.
FIG. 1 is a schematic diagram of a continuous induction welding apparatus for metal-carbon fiber composite materials according to the present invention;
FIG. 2 is a schematic perspective view of a welding head assembly of the present invention;
FIG. 3 is a schematic cross-sectional view of a welding head arrangement of the present invention;
FIG. 4 is a schematic view of the structure of an electrode device of the present invention;
FIG. 5 is a schematic diagram of the current transfer of the present invention;
FIG. 6 is a schematic diagram of the working principle of the welding process of the present invention;
FIG. 7 is a schematic diagram of a two-layer joint structure weld of the present invention;
FIG. 8 is a schematic diagram of a three-layer joint structure weld of the present invention;
FIG. 9 is a schematic view of a joint forming process according to the present invention;
fig. 10 is a schematic view of a joint structure according to the present invention.
In the figure: 1. a welding head; 2. a welder body; 3. a linear guide rail; 11. a pressing wheel; 12. an induction coil; 121. a coil body; 122. a pantograph; 13. an electrode; 131. a positive electrode; 132. a negative electrode; 133. an insulating plate; 134. an insulating sleeve; 135. a conductive contact; 14. a rolling bearing; 15. an end cap; 16. a hollow shaft; 17. a connecting seat; 18. a servo press; 19. a soft copper strip; 110. welding power source.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. 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.
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 10, according to the continuous induction welding device and method for metal and carbon fiber composite materials, a metal part of a joint is heated through electromagnetic induction, and a metal and carbon fiber plate reach a set temperature state under the action of heat conduction; when the welding position reaches enough temperature rise, plastic deformation, mutual invasion and atomic diffusion at the interface are started under the action of the extrusion force of the upper and lower extrusion wheels, and the invasion teeth on the surface of the metal plate are inserted into the carbon fiber plate, so that the orderly and controllable deformation of the carbon fiber material at the welding position is ensured. After the joint is cooled, a composite type connecting joint with a welding component and a mechanical fixing component is formed, so that the high-efficiency and high-performance connection of the metal-carbon fiber composite material plate is realized. The method can realize double-layer lap welding of the metal-carbon fiber plate and can also realize three-layer edge-covering welding of the metal-carbon fiber plate and the metal.
Referring to fig. 1, the metal-carbon fiber composite material continuous induction welding device of the invention comprises a welding machine head 1, a welding machine body 2 and a linear guide rail 3. The welding machine head 1 is divided into an upper group and a lower group, and is respectively fixed with the welding machine body 2 through fasteners. In the welding process, the upper and lower groups of welding heads 1 perform induction heating on the to-be-welded area of the metal-carbon fiber plate joint and apply extrusion force to fixedly connect the high-temperature and plastic metal-carbon fiber composite materials in the area.
The welding machine body 2 can move along the linear guide rail 3 under the drive of the internal motion control unit, drives the extrusion wheel 11 at the end part of the welding machine head 1 to roll at the welding part of the workpiece, and repeatedly heats and extrudes a new area to be welded. After the welding is completed, all the heated and extruded parts of the workpiece form a continuous composite joint with both welding components and mechanical fastening components.
As shown in fig. 2 to 5, the welding head 1 is composed of a pressing wheel 11, an induction coil 12, an electrode 13, a rolling bearing 14, an end cover 15, a hollow shaft 16, a connection base 17, a servo press 18, a flexible copper strip 19, and a welding power supply 110. The servo press 18 is fixed on the welding machine body 2, and the telescopic end of the servo press is connected with the hollow shaft 16 through the connecting seat 17 and is responsible for providing extrusion force pointing to a workpiece.
A rolling bearing 14 is arranged between the end cover 15 and the hollow shaft 16, the extrusion wheel 11 and the end cover 15 are connected together through a fastener, and the extrusion wheel is arranged at the front end of the hollow shaft 16 and can rotate relative to the hollow shaft 16.
The induction coil 12 is composed of a coil body 121 and a pantograph 122, and is uniformly distributed in the extrusion wheel 11, and the axis of the induction coil coincides with the radius of the extrusion wheel 11. During the rolling of the pinch roller 11, each induction coil 12 rotates in turn under the electrode 13, and its electric bow 122 passes a heating current after contacting the conductive contact 135 of the electrode 13.
The electrode 13 is arranged in the hollow shaft 16, and the tail ends of the anode 131 and the cathode 132 of the electrode are respectively connected with the welding power supply 110 through a soft copper belt 19; an insulating plate 133 is arranged between the positive electrode 131 and the negative electrode 132, and an insulating sleeve 134 with a notch and a conductive contact 135 are arranged at the front end and are responsible for contacting the pantograph 122 of the induction coil 12 and conducting current. The welding power source 110 is a high frequency alternating welding power source.
Referring to fig. 6, in the continuous induction welding method of metal and carbon fiber composite material of the present invention, metal-carbon fiber composite material plates are assembled into a work piece of a lap joint structure and are placed between the pressing wheels 11 of the upper and lower welding heads 1 during the welding process. The servo press 18 applies extrusion force to the workpiece through the connecting seat 17, the hollow shaft 16, the end cover 15 and the extrusion wheel 11; the extrusion wheel 11 rolls along the surface of the workpiece under the drive of the welder body 2; at any moment, the induction coil 12 is positioned at the connecting line position between the center of the extrusion wheel 11 and the surface of the workpiece, the pantograph 122 of the induction coil is contacted with the conductive contact 135 of the electrode 13, alternating current flows in the induction coil, and corresponding eddy current is induced on the surface of the metal workpiece, so that resistance heat is generated. When the metal and carbon fiber plates reach a certain temperature rise, the welding parts generate plastic deformation, mutual invasion and atomic diffusion at the interface under the action of extrusion force, and a permanent welding joint is formed after cooling.
As shown in fig. 7 and 8, the welding method of the present invention can realize double-layer lap welding of metal-carbon fiber plates, and can also realize three-layer edge-covering welding of metal-carbon fiber plates. When double-layer lap welding is carried out, the welding head 1 on the metal side simultaneously provides extrusion force and heating for the workpiece, the welding joint 1 on the carbon fiber plate side only provides extrusion force for the workpiece, and the heating of the carbon fiber plate is realized by heat conduction of the single-side metal plate. When three-layer edge-covering welding is carried out, the welding joints 1 on two sides simultaneously provide extrusion force and heating for a workpiece, and the heating of the carbon fiber plates is realized by heat conduction of metal plates on two sides.
Referring to fig. 9 and 10, in order to achieve the composite connection effect of both the welding component and the mechanical fastening component, the welding method of the present invention is provided with intrusion teeth, a flow guiding surface and a filling cavity at the contact surface of the metal plate and the carbon fiber plate. When the welding part reaches enough temperature rise and begins to generate plastic deformation under the action of extrusion force, the invasion teeth on the surface of the metal plate are inserted into the carbon fiber plate, and the corresponding extrusion materials enter the filling cavity along the flow guide surface, so that the ordered and controllable plastic deformation of the carbon fiber material at the welding part is ensured. After cooling, the carbon fiber material and the metal form mechanical connection which is staggered with each other, and all contact surfaces form welding connection, so that the permanent connection of the metal-carbon fiber plate is finally realized.
Examples
The following description will be made by taking aluminum alloy-carbon fiber plate welding as an example:
(1) The welding materials are rolled 5083 aluminum alloy plate and carbon fiber reinforced polyether-ether-ketone plate, and the plate thickness combination is 1.5mm+2mm. The induced current is 200A, the welding extrusion force is 500N, and the welding speed is 50mm/min.
(2) Before welding, firstly assembling an aluminum alloy-carbon fiber plate into a lap joint structure, and placing the lap joint structure between the extrusion wheels 11 of the upper and lower welding heads 1; the extrusion wheel 11 tightens the aluminum alloy-carbon fiber plate and applies a fixed welding pressure.
(3) The welding power supply 110 outputs heating current, and the heating current is conducted to the inside of the extrusion wheel 11 through the electrode 13; the induction coil 12 located at the conductive contact 135 with the electrode 13 forms a conductive circuit with the electrode 13, generates a high-frequency magnetic field, and induces a corresponding eddy current in the aluminum alloy sheet, thereby generating resistance heat. When the carbon fiber plate is heated to a certain temperature, plastic deformation is generated under the action of extrusion force, the carbon fiber plate is mutually invaded with the aluminum alloy plate and atoms at the interface are diffused, and permanent connection is formed after cooling.
(4) The welding machine body 2 moves along the linear guide rail, the extrusion wheel 11 at the end part of the welding machine head 1 is driven to roll at the welding part of the workpiece, and the new area to be welded is repeatedly heated and extruded. After the welding is completed, all the heated and extruded parts of the workpiece form a continuous composite joint with both welding components and mechanical fastening components.
The above description is only a preferred example of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A metal and carbon fiber composite material continuous induction welding device is characterized in that: the welding machine comprises a welding machine head (1), a welding machine body (2) and a linear guide rail (3), wherein the welding machine head (1) is divided into an upper group and a lower group, and the welding machine head and the welding machine body (2) are respectively fixed together through fasteners; in the welding process, an upper welding machine head and a lower welding machine head carry out induction heating on a workpiece formed by overlapping a metal plate and a carbon fiber plate, namely a joint to-be-welded area, apply extrusion force, and fixedly connect high-temperature and plastic metal and carbon fiber composite materials in the to-be-welded area together; the welding machine body (2) moves along the linear guide rail (3) to drive the extrusion wheel (11) at the end part of the welding machine head (1) to roll and advance at the welding part of the workpiece, and repeatedly heats and extrudes a new area to be welded; after the welding is completed, all the heated and extruded parts of the workpiece form a continuous composite joint with both welding components and mechanical fastening components.
2. The continuous induction welding apparatus for metal and carbon fiber composite materials according to claim 1, wherein: the welding machine head (1) comprises a squeezing wheel (11), an induction coil (12), an electrode (13), a rolling bearing (14), an end cover (15), a hollow shaft (16), a connecting seat (17), a servo press (18), a soft copper belt (19) and a welding power supply (110), wherein the servo press (18) is fixed on a welding machine body (2), and the telescopic end of the servo press is connected with the hollow shaft (16) through the connecting seat (17) and is responsible for providing a squeezing force pointing to a workpiece; a rolling bearing (14) is arranged between the end cover (15) and the hollow shaft (16), the extrusion wheel (11) and the end cover (15) are connected together through a fastener, and the extrusion wheel is arranged at the front end of the hollow shaft (16) and rotates relative to the hollow shaft (16);
the induction coil (12) is composed of a coil body (121) and a pantograph (122), and the array is uniformly distributed in the extrusion wheel (11); the axes of the induction coils (12) are coincident with the radius of the extrusion wheel (11), and in the rolling process of the extrusion wheel (11), each induction coil (12) rotates to the lower part of the electrode (13) in sequence, and the pantograph (122) is contacted with the conductive contact (135) of the electrode (13) to transmit heating current;
the electrode (13) is arranged in the hollow shaft (16), and the tail ends of the anode (131) and the cathode (132) of the electrode are respectively connected with the welding power supply (110) through soft copper strips (19); an insulating plate (133) is arranged between the positive electrode (131) and the negative electrode (132) of the electrode, an insulating sleeve (134) with a notch and a conductive contact (135) are arranged at the front end of the insulating sleeve, and the insulating sleeve is in charge of contacting with a pantograph (122) of the induction coil (12) and conducting current.
3. A continuous induction welding method for a metal and carbon fiber composite material is characterized by comprising the following steps of: the metal and carbon fiber composite material plates are assembled into a workpiece with a lap joint structure and are arranged between the extrusion wheels (11) of the upper and lower groups of welding heads (1); the servo press (18) applies extrusion force to the workpiece through the connecting seat (17), the hollow shaft (16), the end cover (15) and the extrusion wheel (11); the extrusion wheel (11) rolls along the surface of the workpiece under the drive of the welding machine body (2); at any moment, an induction coil (12) is positioned at the connecting line position of the center of the extrusion wheel (11) and the surface of the workpiece, a pantograph (122) of the induction coil is contacted with a conductive contact (135) of an electrode (13), alternating current flows in the coil, and corresponding eddy current is induced on the surface of the metal workpiece, so that resistance heat is generated; when the metal and carbon fiber plates reach a certain temperature rise, the welding parts generate plastic deformation, mutual invasion and atomic diffusion at the interface under the action of extrusion force, and a permanent welding joint is formed after cooling.
4. A method of continuous induction welding of metal and carbon fiber composites according to claim 3, wherein: the method can realize double-layer lap welding of metal and carbon fiber plates and can also realize metal-carbon fiber plates-metal three-layer edge-covering welding; when double-layer lap welding is carried out, a welding machine head (1) at the metal side simultaneously provides extrusion force and heating for a workpiece, a welding joint (1) at the carbon fiber plate side only provides extrusion force for the workpiece, and the heating of the carbon fiber plate is realized by heat conduction of a single-side metal plate; when three-layer edge-covering welding is carried out, the welding joints (1) on two sides simultaneously provide extrusion force and heating for the workpiece, and the heating of the carbon fiber plates is realized by heat conduction of the metal plates on two sides.
5. A method of continuous induction welding of metal and carbon fiber composites according to claim 3, wherein: an invasion tooth, a flow guide surface and a filling cavity are arranged on the contact surface of the metal plate and the carbon fiber plate; when the welding position reaches the set temperature rise and begins to generate plastic deformation under the action of the extrusion force, the invasion teeth on the surface of the metal plate are inserted into the carbon fiber plate, and the corresponding extrusion materials enter the filling cavity along the flow guide surface, so that the ordered and controllable plastic deformation of the carbon fiber material at the welding position is ensured; after cooling, the carbon fiber material and the metal form mechanical connection which is staggered with each other, all contact surfaces form welding connection, and finally, the permanent connection between the metal and the carbon fiber plate is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310281697.3A CN116277993A (en) | 2023-03-22 | 2023-03-22 | Continuous induction welding device and method for metal and carbon fiber composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310281697.3A CN116277993A (en) | 2023-03-22 | 2023-03-22 | Continuous induction welding device and method for metal and carbon fiber composite material |
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| Publication Number | Publication Date |
|---|---|
| CN116277993A true CN116277993A (en) | 2023-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310281697.3A Withdrawn CN116277993A (en) | 2023-03-22 | 2023-03-22 | Continuous induction welding device and method for metal and carbon fiber composite material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116277993A (en) |
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2023
- 2023-03-22 CN CN202310281697.3A patent/CN116277993A/en not_active Withdrawn
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