CN111489852A - Copper-clad aluminum wire with good extensibility and manufacturing process thereof - Google Patents
Copper-clad aluminum wire with good extensibility and manufacturing process thereof Download PDFInfo
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- CN111489852A CN111489852A CN202010384239.9A CN202010384239A CN111489852A CN 111489852 A CN111489852 A CN 111489852A CN 202010384239 A CN202010384239 A CN 202010384239A CN 111489852 A CN111489852 A CN 111489852A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/02—Single bars, rods, wires, or strips
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
- H01B1/023—Alloys based on aluminium
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/0003—Apparatus or processes specially adapted for manufacturing conductors or cables for feeding conductors or cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/0016—Apparatus or processes specially adapted for manufacturing conductors or cables for heat treatment
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/0026—Apparatus for manufacturing conducting or semi-conducting layers, e.g. deposition of metal
Abstract
The invention discloses a copper-clad aluminum wire with good extensibility and a manufacturing process thereof, and the copper-clad aluminum wire comprises an aluminum alloy core, wherein a copper layer is pressed on the outer surface of the aluminum alloy core, the number of aluminum wire cores in the aluminum alloy core is 1-99, the aluminum alloy core is one of round, rectangular or square, the resistivity of the copper-clad aluminum wire is 0.012 omega m-0.028 omega m, and the density of the copper-clad aluminum wire is 2.5 g/cm-8.5 g/cm. Compared with the prior art, the copper-clad aluminum wire with good extensibility and the manufacturing process thereof have the advantages that the extensibility is strong, the flexibility is strong, the extensibility can reach more than or equal to 20%, the problems of processing and finished product breakage are solved, the tensile quality can be conveniently controlled by controlling the intensity of current and the power-on time, the control is simple, the most suitable data can be obtained through convenient experiments, the problem of high difficulty of the tensile process can be effectively reduced, the heating box is internally flushed with nitrogen for protection, and oxidation reaction and color change are prevented.
Description
Technical Field
The invention relates to the technical field of copper-clad aluminum wires, in particular to a copper-clad aluminum wire with good extensibility and a manufacturing process thereof.
Background
The copper-clad aluminum wire adopts an advanced cladding welding manufacturing technology, a high-quality copper strip is concentrically clad on the outer surface of a core wire such as an aluminum rod or a steel wire, firm interatomic metallurgical bonding is formed between a copper layer and the core wire, two different metal materials are combined into an inseparable whole, drawing and annealing treatment can be carried out like processing a single metal wire, the copper and the aluminum are varied in the same proportion in the drawing process, the volume ratio of the copper layer is kept relatively constant, and the copper-clad aluminum wire simultaneously has the composite characteristic of small conductivity of the copper and the density of the aluminum; while copper clad steel wire combines the conductivity of copper with the high strength of steel.
Chinese patent discloses a preparation method of copper-clad aluminum cables (publication number: CN 108878063A), which comprises the steps of firstly preparing copper-clad aluminum bars by using a copper-clad aluminum bar preparation furnace; then the prepared copper-clad aluminum bar is conveyed to a drawing machine for drawing treatment, and the copper-clad aluminum bar is drawn for a plurality of times by the drawing machine to form a copper-clad aluminum wire, so that the diameter of the copper-clad aluminum wire meets the requirement; and finally, conveying the prepared copper-clad aluminum wire to an annealing furnace for treatment, so that the copper layer wrapped on the outer side of the aluminum core is tightly attached to the aluminum core, and the copper-clad aluminum cable is formed.
The existing copper-clad aluminum-magnesium alloy and other copper-clad aluminum alloy wires are very brittle, poor in flexibility, easy to break and not more than 10% in elongation under the conditions that the weight ratio of copper is not more than 50%, the cross-sectional area of the wire is not more than 20m square meter, the resistivity is 0.017 ohm m-0.03 ohm m, and the density is 2.7 g/cm-8.9 g/cm.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a copper-clad aluminum wire with good extensibility and a manufacturing process thereof, and solves the problems that the existing copper-clad aluminum, copper-clad aluminum-magnesium alloy and other copper-clad aluminum alloy wires are very brittle, poor in flexibility, easy to break and easy to break in a processing process and finished products under the conditions that the weight ratio of copper is not more than 50%, the cross-sectional area of the wire is not more than 20m, the resistivity is 0.017 omega m-0.03 omega m and the density is 2.7g/cm and 8.9 g/cm for carrying out the method, and the tensile quality is difficult to control in the prior art, so that the difficulty of the tensile process is high, and when an irregular surface is adopted by aluminum rods, gaps can be generated between copper layers and the aluminum rods, so that unstable connection is caused, and the oxidation and discoloration of the wire during processing are prevented.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a copper-clad aluminum wire with good extensibility comprises an aluminum alloy core, wherein a copper layer is pressed on the outer surface of the aluminum alloy core.
Preferably, the number of the aluminum wire cores in the aluminum alloy core is 1-99, and the aluminum alloy core is one of round, rectangular or square.
Preferably, the resistivity of the copper-clad aluminum wire is 0.012 Ω m-0.028 Ω m, and the density of the copper-clad aluminum wire is obtained by carrying out high-speed.
The invention also discloses a manufacturing process of the copper-clad aluminum wire with good extensibility, which comprises the following steps:
step 1: continuously conveying the round copper clad aluminum material to an alloy pressing wheel to enable the round copper clad aluminum material to be in a required flat shape or square copper clad aluminum specification;
step 2: starting a traction device to sequentially draw the flat copper clad aluminum to the first annealing copper wheel, the nitrogen filling pipe, the second annealing copper wheel, the blowing nozzle, the third annealing copper wheel, the baking box and the take-up shaft;
and step 3: starting a water pump to enable the cooling liquid in the water tank to flow over the second annealing copper wheel and be higher than the lower end of the nitrogen filling pipe;
and 4, step 4: starting a nitrogen valve, supplying a proper amount of nitrogen into the nitrogen filling pipe, discharging air in the pipe, and continuously supplying the nitrogen into the nitrogen filling pipe;
and 5: starting a high-pressure air valve, leading high-pressure air in an air compressor to an air blowing nozzle, and adjusting the air pressure until no obvious water mist exists on the surface of the wire rod;
step 6: starting the baking oven, and adjusting the temperature in the baking oven to completely dry the wire;
and 7: starting an annealing power supply, enabling current to flow to the three annealing copper wheels to enable the wire to generate heat, and adjusting voltage and current to enable the flat copper-clad aluminum wire to be softened to generate extensibility, wherein the extensibility reaches more than 20%;
and 8: winding wires at each part of the equipment are drawn by a wire guide wheel;
and step 9: and starting the traction device to continuously wind the copper-clad aluminum product to a take-up shaft at a stable and proper speed to obtain the copper-clad aluminum product meeting the requirements.
Preferably, the copper-clad aluminum wire with flat or square copper can be processed by the steps 1-9, and the round copper-clad aluminum wire can be processed by the steps 2-9.
Preferably, the alloy pinch rollers are provided with two groups, and the two groups of alloy pinch rollers are distributed on two sides of the wire.
Preferably, the blowing nozzle is positioned on the upper side of the cooling liquid.
Preferably, a rotating roller for bending the wire rod is arranged between the third annealing copper wheel and the blowing nozzle.
Preferably, the wire guiding wheels are provided with two groups, and the two groups of wire guiding wheels are respectively arranged on one sides of the baking oven and the wire winding shaft.
(III) advantageous effects
The invention provides a copper-clad aluminum wire with good extensibility and a manufacturing process thereof. The method has the following beneficial effects:
(1) compared with the prior art, the wire produced by the improved process technology has the advantages of strong extensibility and flexibility, and the elongation rate can reach more than or equal to 20%, so that the problems of the processing process and the breakage of finished products are solved, the tensile quality can be conveniently controlled by controlling the intensity of current and the electrifying time, the control is simple, the experiment is convenient to obtain the most suitable data, and the problem of high difficulty of the tensile process can be effectively reduced.
(2) The copper-clad aluminum wire with good extensibility and the manufacturing process thereof can prevent the wire from oxidation reaction and color change by flushing nitrogen into the heating box for protection when the wire is heated, and the aluminum rod and the copper layer in the wire need to be subjected to cold pressing processing before processing, so that the copper layer can be fully extruded into the gap of the aluminum rod, the integrity of the wire can be better, and the connection is firmer.
(3) This copper clad aluminum wire that extensibility can be good and preparation technology, processing platform simple structure through being used for preparation technology, thereby can effectively reduce the processing cost of wire rod, and can effectively improve the work flow of preparation, the connection part of heating cabinet and air-drying cabinet all is provided with wind-equalizing plate and fan in this device, the heating cabinet can improve nitrogen gas exhaust air's speed and quality, and can reduce the quantity that nitrogen gas revealed from device inside, the air-drying cabinet then can improve the speed that the air flows, improve air-dried quality.
(4) And the performance parameters of the product on the production process are adjusted by weight by changing the volume ratio of copper to aluminum so as to meet the requirements of customers on performance. The mechanical property and physical property of the original copper-clad aluminum are changed by changing the material or the component of copper and adding some alloy and other elements into aluminum metal, so as to meet the requirement of customer performance. The copper-clad aluminum material realizes circular cladding by cold-pressing and welding the clad aluminum alloy material on the surface. The appearance does not reveal aluminum and does not crack.
Drawings
FIG. 1 is a process diagram of the production flow of the present invention;
FIG. 2 is a cross-sectional view of the wire rod of the present invention;
FIG. 3 is a cross-sectional view of a copper clad aluminum wire with a circular aluminum core according to the present invention;
FIG. 4 is a cross-sectional view of a copper clad aluminum wire with a flat aluminum core according to the present invention;
FIG. 5 is a schematic diagram of copper clad aluminum of a square aluminum core according to the present invention.
In the figure, 1, an alloy pinch roller; 2. annealing the copper wheel I; 3. a nitrogen gas filling pipe; 4. annealing the copper wheel II; 5. a blowing nozzle; 6. annealing the copper wheel III; 7. a baking oven; 8. taking up a spool; 9. a nitrogen gas valve; 10. a high pressure gas valve; 11. a wire guide wheel; 12. cooling liquid; 13. an aluminum alloy core; 14. a copper layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-3, an embodiment of the present invention provides a technical solution: a manufacturing process of a copper-clad aluminum wire with good extensibility comprises the following steps:
step 1: pressing a copper layer 14 to the outer sides of 1 aluminum alloy core, starting a traction device to sequentially draw the flat copper clad aluminum to an annealing copper wheel I2, a nitrogen filling pipe 3, an annealing copper wheel II 4, an air blowing nozzle 5, an annealing copper wheel III 6, a baking box 7 and a take-up shaft 8;
step 2: starting a water pump to enable the cooling liquid in the water tank to flow over the second annealing copper wheel 4 and be higher than the lower end of the nitrogen filling pipe 3;
and step 3: starting a nitrogen valve 9, supplying a proper amount of nitrogen into the nitrogen filling pipe 3, discharging air in the pipe, and continuously supplying nitrogen into the nitrogen filling pipe 3;
and 4, step 4: starting a high-pressure air valve 10, leading high-pressure air in the air compressor to an air blowing nozzle 5, and adjusting the air pressure until no obvious water mist exists on the surface of the wire rod;
and 5: starting the baking oven 7, and adjusting the temperature in the baking oven 7 to completely dry the wire;
step 6: starting an annealing power supply, enabling current to flow to the three annealing copper wheels to enable the wire to generate heat, and adjusting voltage and current to enable the flat copper-clad aluminum wire to be softened to generate extensibility, wherein the extensibility reaches more than 20%;
and 7: the winding at each position of the equipment is drawn by a wire guide wheel 11;
and 8: and starting the traction device to continuously wind the copper-clad aluminum product to the take-up shaft 8 at a stable and proper speed to obtain the copper-clad aluminum product meeting the requirement.
Example 2
Referring to fig. 4, an embodiment of the present invention provides a technical solution: a manufacturing process of a copper-clad aluminum wire with good extensibility comprises the following steps:
step 1: pressing a copper layer 14 to the outer side of 1 aluminum alloy core, and continuously conveying the round copper-clad aluminum material to the alloy pressing wheel 1 to enable the round copper-clad aluminum material to be in a required flat specification;
step 2: starting a traction device to sequentially draw the flat copper clad aluminum to a first annealing copper wheel 2, a nitrogen filling pipe 3, a second annealing copper wheel 4, an air blowing nozzle 5, a third annealing copper wheel 6, a baking box 7 and a take-up shaft 8;
and step 3: starting a water pump to enable the cooling liquid in the water tank to flow over the second annealing copper wheel 4 and be higher than the lower end of the nitrogen filling pipe 3;
and 4, step 4: starting a nitrogen valve 9, supplying a proper amount of nitrogen into the nitrogen filling pipe 3, discharging air in the pipe, and continuously supplying nitrogen into the nitrogen filling pipe 3;
and 5: starting a high-pressure air valve 10, leading high-pressure air in the air compressor to an air blowing nozzle 5, and adjusting the air pressure until no obvious water mist exists on the surface of the wire rod;
step 6: starting the baking oven 7, and adjusting the temperature in the baking oven 7 to completely dry the wire;
and 7: starting an annealing power supply, enabling current to flow to the three annealing copper wheels to enable the wire to generate heat, and adjusting voltage and current to enable the flat copper-clad aluminum wire to be softened to generate extensibility, wherein the extensibility reaches more than 20%;
and 8: the winding at each position of the equipment is drawn by a wire guide wheel 11;
and step 9: and starting the traction device to continuously wind the copper-clad aluminum product to the take-up shaft 8 at a stable and proper speed to obtain the copper-clad aluminum product meeting the requirement.
Referring to fig. 5, an embodiment of the present invention provides a technical solution: a manufacturing process of a copper-clad aluminum wire with good extensibility comprises the following steps:
step 1: pressing a copper layer 14 to the outer side of 1 aluminum alloy core, and continuously conveying the round copper-clad aluminum material to the alloy pressing wheel 1 to enable the round copper-clad aluminum material to be in a required square specification;
step 2: starting a traction device to sequentially draw the flat copper clad aluminum to a first annealing copper wheel 2, a nitrogen filling pipe 3, a second annealing copper wheel 4, an air blowing nozzle 5, a third annealing copper wheel 6, a baking box 7 and a take-up shaft 8;
and step 3: starting a water pump to enable the cooling liquid in the water tank to flow over the second annealing copper wheel 4 and be higher than the lower end of the nitrogen filling pipe 3;
and 4, step 4: starting a nitrogen valve 9, supplying a proper amount of nitrogen into the nitrogen filling pipe 3, discharging air in the pipe, and continuously supplying nitrogen into the nitrogen filling pipe 3;
and 5: starting a high-pressure air valve 10, leading high-pressure air in the air compressor to an air blowing nozzle 5, and adjusting the air pressure until no obvious water mist exists on the surface of the wire rod;
step 6: starting the baking oven 7, and adjusting the temperature in the baking oven 7 to completely dry the wire;
and 7: starting an annealing power supply, enabling current to flow to the three annealing copper wheels to enable the wire to generate heat, and adjusting voltage and current to enable the flat copper-clad aluminum wire to be softened to generate extensibility, wherein the extensibility reaches more than 20%;
and 8: the winding at each position of the equipment is drawn by a wire guide wheel 11;
and step 9: and starting the traction device to continuously wind the copper-clad aluminum product to the take-up shaft 8 at a stable and proper speed to obtain the copper-clad aluminum product meeting the requirement.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A copper-clad aluminum wire with good extensibility is characterized in that: the aluminum alloy core comprises an aluminum alloy core (13), and a copper layer (14) is pressed on the outer surface of the aluminum alloy core (13).
2. The copper-clad aluminum wire with good extensibility as claimed in claim 1, wherein: the number of the aluminum wire cores in the aluminum alloy core (13) is 1-99, and the aluminum alloy core (13) is one of round, rectangular or square.
3. The copper-clad aluminum wire with good extensibility as claimed in claim 1, wherein: the resistivity of the copper-clad aluminum wire is 0.012 omega m-0.028 omega m, and the density of the copper-clad aluminum wire is obtained by carrying out high-speed high-.
4. The manufacturing process of the copper-clad aluminum wire with good extensibility according to any one of claims 1-3, characterized in that: the method comprises the following steps:
step 1: continuously conveying the round copper clad aluminum material to the alloy pinch roller (1) to enable the round copper clad aluminum material to be in a required flat shape or square copper clad aluminum specification;
step 2: starting a traction device to sequentially draw the flat copper clad aluminum to a first annealing copper wheel (2), a nitrogen filling pipe (3), a second annealing copper wheel (4), an air blowing nozzle (5), a third annealing copper wheel (6), a baking box (7) and a take-up shaft (8);
and step 3: starting a water pump to enable the cooling liquid in the water tank to flow over the second annealing copper wheel (4) and be higher than the lower end of the nitrogen filling pipe (3);
and 4, step 4: starting a nitrogen valve (9), supplying a proper amount of nitrogen into the nitrogen filling pipe (3), discharging air in the pipe, and continuously supplying the nitrogen into the nitrogen filling pipe (3);
and 5: starting a high-pressure air valve (10), leading high-pressure air in an air compressor to an air blowing nozzle (5), and adjusting the air pressure until no obvious water mist exists on the surface of the wire rod;
step 6: starting the baking box (7), and adjusting the temperature in the baking box (7) to completely dry the wire;
and 7: starting an annealing power supply, enabling current to flow to the three annealing copper wheels to enable the wire to generate heat, and adjusting voltage and current to enable the flat copper-clad aluminum wire to be softened to generate extensibility, wherein the extensibility reaches more than 20%;
and 8: the winding at each position of the equipment is drawn by a wire guide wheel (11);
and step 9: and starting the traction device to continuously wind the copper-clad aluminum product to the take-up shaft (8) at a stable and proper speed to obtain the copper-clad aluminum product meeting the requirement.
5. The manufacturing process of the copper-clad aluminum wire with good extensibility according to claim 4, characterized in that: the copper-clad aluminum wire with flat or square copper can be processed by the steps 1-9, and the round copper-clad aluminum wire can be processed by the steps 2-9.
6. The manufacturing process of the copper-clad aluminum wire with good extensibility according to claim 4, characterized in that: the alloy pinch rollers (1) are provided with two groups, and the two groups of alloy pinch rollers (1) are distributed on two sides of the wire.
7. The manufacturing process of the copper-clad aluminum wire with good extensibility according to claim 4, characterized in that: the air blowing nozzle (5) is positioned on the upper side of the cooling liquid (12).
8. The manufacturing process of the copper-clad aluminum wire with good extensibility according to claim 4, characterized in that: and a rotating roller for bending the wire rod is arranged between the annealing copper wheel III (6) and the air blowing nozzle (5).
9. The manufacturing process of the copper-clad aluminum wire with good extensibility according to claim 4, characterized in that: the wire guiding wheels (11) are arranged in two groups, and the two groups of wire guiding wheels (11) are respectively arranged on one sides of the baking oven (7) and the take-up shaft (8).
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| CN202010384239.9A CN111489852A (en) | 2020-05-09 | 2020-05-09 | Copper-clad aluminum wire with good extensibility and manufacturing process thereof |
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| CN202010384239.9A CN111489852A (en) | 2020-05-09 | 2020-05-09 | Copper-clad aluminum wire with good extensibility and manufacturing process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115910485A (en) * | 2023-02-27 | 2023-04-04 | 安徽钰鑫金属制品有限公司 | Copper-clad aluminum enameled wire production equipment |
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| CN2597484Y (en) * | 2002-11-12 | 2004-01-07 | 司怀吉 | Inductive machine for continuously annealing softening conductor |
| JP2012057242A (en) * | 2010-09-13 | 2012-03-22 | Hitachi Cable Ltd | Method of manufacturing copper-based alloy with high strength, high conductivity and high heat resistance, and copper-based alloy with high strength, high conductivity and high heat resistance |
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Inventor after: Wu Weibin Inventor after: Zeng Weisheng Inventor after: Li Fanfu Inventor before: Wu Weibin Inventor before: Mei Xiaohong Inventor before: Zeng Weisheng Inventor before: Li Fanfu |
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Application publication date: 20200804 |