CN110777310A - Copper wire drawing and annealing method - Google Patents
Copper wire drawing and annealing method Download PDFInfo
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- CN110777310A CN110777310A CN201911162059.XA CN201911162059A CN110777310A CN 110777310 A CN110777310 A CN 110777310A CN 201911162059 A CN201911162059 A CN 201911162059A CN 110777310 A CN110777310 A CN 110777310A
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- annealing
- copper wire
- nitrogen
- nitrogen gas
- heating
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
Abstract
The invention discloses a copper wire drawing and annealing method, which comprises the following steps: the nitrogen gas storage tank is sequentially connected with the dryer, the flowmeter, the switch valve and the annealing cabin through connecting pipes, the nitrogen gas is dried by the dryer, the pressure is displayed in real time through the flowmeter, the switch valve controls the on-off of the nitrogen gas, and finally the nitrogen gas enters the sealing pipe of the annealing cabin; filling nitrogen into the sealing tube, then enabling the copper wire to pass through the sealing tube, enabling the copper wire to pass through the sealing tube to enter the annealing chamber, and annealing through the first annealing wheel and the second annealing wheel; the electrode is annealed by the first annealing wheel and the second annealing wheel to uniformly introduce large current into the copper wire, so that the preheating and heating of the copper wire are realized; during preheating, heating the copper wire to 250 ℃; heating the copper wire to 500-550 ℃ to recrystallize the copper wire; the heating section is protected by nitrogen to prevent the copper wire from being oxidized, and the copper wire is cooled by water to finish the annealing process. The annealing method improves the product quality, improves the product qualification rate and quality and reduces the annealing cost.
Description
Technical Field
The invention belongs to the field of copper wire processing, and particularly relates to a copper wire drawing and annealing method for reducing annealing energy consumption.
Background
During the drawing process of the copper wire, when the wire is plastically deformed, the crystal lattice is distorted, and the phenomena of mechanical, physical and chemical property changes are generated. The presence of work hardening reduces the plasticity of the wire, increases the resistance to deformation, such as yield strength, hardness, reduces electrical and thermal conductivity, and reduces chemical resistance. To solve this problem and at the same time improve the metal properties, we have to take measures, namely annealing. Namely, a method for treating metal, which is characterized in that the metal is recrystallized at a certain temperature, the damaged crystal lattice is recovered, the work hardening phenomenon is eliminated, and the performance of the metal is recovered to the index before plastic working.
At present copper line is through low-voltage heavy current annealing, prevents during the annealing that the copper line is by the oxygen oxidation in the air, will protect, originally uses steam generator heating steam to fill out annealing pipe exhaust air to obtain the mesh of annealing protection, by parts such as steam generator, protective case, steam circulation pipeline, soft water supply water. However, in the protection mode, the temperature of steam is high, the aging of a rubber sealing piece and a bakelite insulating wheel of equipment is accelerated, the leakage of the steam and cooling liquid is caused, meanwhile, water molecules are attached to the surface of a copper wire, and after the copper wire is cooled, the surface of the copper wire is easy to generate an oxidation phenomenon, so that the formed copper rate is low, and the product quality is influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a copper wire drawing and annealing method, which solves the problems that the traditional annealing protection is performed by adopting steam, the aging of a rubber sealing piece and a bakelite insulating wheel of equipment is accelerated, water molecules are attached to the surface of a copper wire, and the surface of the copper wire is easy to generate an oxidation phenomenon after the copper wire is cooled.
In order to achieve the purpose, the invention adopts the following technical scheme: a copper wire drawing and annealing method comprises the following steps:
introducing nitrogen gas, removing air,
the nitrogen gas storage tank is sequentially connected with the dryer, the flowmeter, the switch valve and the annealing cabin through connecting pipes, the nitrogen gas is dried by the dryer, the pressure is displayed in real time through the flowmeter, the switch valve controls the on-off of the nitrogen gas, and finally the nitrogen gas enters the sealing pipe of the annealing cabin;
the copper wire enters the annealing chamber to be heated,
filling nitrogen into the sealing tube, then enabling the copper wire to pass through the sealing tube, enabling the copper wire to pass through the sealing tube to enter the annealing chamber, and annealing through the first annealing wheel and the second annealing wheel; the electrode is annealed by the first annealing wheel and the second annealing wheel to uniformly introduce large current into the copper wire, so that the preheating and heating of the copper wire are realized; during preheating, heating the copper wire to 250 ℃; heating the copper wire to 500-550 ℃ to recrystallize the copper wire; the heating section is protected by nitrogen to prevent the copper wire from being oxidized,
and (4) cooling the copper wire by water to finish the annealing process.
Furthermore, the sealing tube has a double-layer structure, a bakelite tube is arranged in the rectangular sealing body, and nitrogen is filled into the bakelite tube.
Furthermore, the bakelite pipe is formed by connecting a plurality of short pipes, and the connecting port adopts a 0-shaped sealing ring.
Further, the connecting pipe is a galvanized steel pipe.
Further, a pressure reducing valve is mounted on the connecting pipe.
The working principle of the invention is as follows:
and 4, selecting an anti-oxidation material of the annealing protection system. Annealing has two most fundamental requirements for oxidation resistant materials. Firstly, the physical state is gaseous; secondly, the two requirements of stable property are integrated, and finally nitrogen is selected as an anti-oxidation material for annealing protection by combining market price, purchasing channels and raw material supply. The nitrogen gas has the advantages of no water, no toxicity, flame retardance, proper pressure, stable physical and chemical properties, difficult reaction with other substances, safe use outdoors, lower cost and the like. After nitrogen protection is used, the section of the bare copper wire in the annealing cabin, which needs to be prevented from being oxidized, is filled with nitrogen to discharge air through a pipeline, so that the purpose of annealing protection is achieved. Through trial and calculation, nitrogen has obvious advantages over steam: the nitrogen gas has low price, each cubic meter is more than 100 RMB cheaper than steam, the actual gas consumption is calculated to be 4000m3 according to 365 days per year and 8 hours per day, and the RMB is 40 RMB. In addition, no condensed water is accumulated in the pipeline passing through the nitrogen, and the accident of freezing the pipe in winter can be effectively prevented.
The invention has the beneficial effects that:
1. the annealing method adopts nitrogen instead, so that the problems of insufficient steam quantity and high energy consumption are avoided, and the aims of improving the stability and durability of the whole annealing machine, reducing the energy consumption and improving the product quality are fulfilled;
2. the nitrogen does not contain water, thereby avoiding the phenomenon that the steam is liquefied when meeting cold to cause product oxidation and indirectly improving the product qualification rate and quality;
3. and nitrogen is used instead, so that the annealing cost is reduced.
Drawings
FIG. 1 is a schematic diagram illustrating the principle of the wire drawing and annealing method of copper wire according to the present invention;
FIG. 2 is a schematic step diagram of a copper wire drawing and annealing method according to the present invention.
In the figure, 1, a nitrogen gas storage tank; 2. a dryer; 3. a pressure reducing valve; 4. a flow meter; 5. an on-off valve; 6. a coupling tube; 7. a first annealing wheel; 8. a second annealing wheel; 9. an annealing chamber; 10. and (5) sealing the tube.
Detailed Description
The details of the present invention are described below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 2, a method for drawing and annealing a copper wire is characterized in that: the method comprises the following steps:
s1, introducing nitrogen, removing air,
as shown in fig. 1, a nitrogen gas storage tank 1 is sequentially connected with a dryer 2, a flowmeter 4, a switch valve 5 and an annealing chamber 9 through a connecting pipe 6, the nitrogen gas is dried by the dryer 2, the pressure of the nitrogen gas is displayed in real time through the flowmeter 4, the switch valve 5 controls the on-off of the nitrogen gas, and the nitrogen gas finally enters a sealing pipe 10 of the annealing chamber 9;
s2, the copper wire enters an annealing chamber 9 to be heated,
filling nitrogen into a sealing tube 10, allowing a copper wire to pass through the sealing tube 10, allowing the copper wire to pass through the sealing tube 10, enter an annealing chamber 9, and annealing through a first annealing wheel 7 and a second annealing wheel 8; the electrodes are annealed by the first annealing wheel 7 and the second annealing wheel 8 to uniformly introduce large current into the copper wires, so that the preheating and heating of the copper wires are realized; during preheating, heating the copper wire to 250 ℃; heating the copper wire to 500-550 ℃ to recrystallize the copper wire; the heating section is protected by nitrogen to prevent the copper wire from being oxidized,
and S3, cooling the copper wire by water to finish the annealing process.
In practical application, the sealing tube 10 has a double-layer structure, a bakelite tube is arranged in the rectangular sealing body, and nitrogen is filled into the bakelite tube.
In practical application, the bakelite pipe is formed by connecting a plurality of short pipes, and the connecting port adopts a 0-shaped sealing ring.
In practical application, the connecting pipe 6 is a galvanized steel pipe.
In practical applications, the pressure reducing valve 3 is mounted on the connecting pipe 6.
The working principle of the invention is as follows:
and 4, selecting an anti-oxidation material of the annealing protection system. Annealing has two most fundamental requirements for oxidation resistant materials. Firstly, the physical state is gaseous; secondly, the two requirements of stable property are integrated, and finally nitrogen is selected as an anti-oxidation material for annealing protection by combining market price, purchasing channels and raw material supply. The nitrogen gas has the advantages of no water, no toxicity, flame retardance, proper pressure, stable physical and chemical properties, difficult reaction with other substances, safe use outdoors, lower cost and the like. After nitrogen protection is used, the section of the bare copper wire in the annealing chamber 9, which needs to be prevented from being oxidized, is filled with nitrogen to discharge air through a pipeline, so that the purpose of annealing protection is achieved. Through trial and calculation, nitrogen has obvious advantages over steam: the nitrogen gas has low price, each cubic meter is more than 100 RMB cheaper than steam, the actual gas consumption is calculated to be 4000m3 according to 365 days per year and 8 hours per day, and the RMB is 40 RMB. In addition, no condensed water is accumulated in the pipeline passing through the nitrogen, and the accident of freezing the pipe in winter can be effectively prevented.
In summary, the annealing method uses nitrogen instead, and avoids the problems of insufficient steam quantity and high energy consumption, thereby realizing the purposes of improving the stability and durability of the whole machine, reducing the energy consumption and improving the product quality, improving the qualification rate and quality of products and reducing the annealing cost.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the foregoing embodiments are merely illustrative of the technical spirit and features of the present invention, and the present invention is not limited thereto but may be implemented by those skilled in the art.
Claims (5)
1. A copper wire drawing and annealing method is characterized by comprising the following steps: the method comprises the following steps:
s1, introducing nitrogen, removing air,
the nitrogen gas storage tank (1) is sequentially connected with the dryer (2), the flowmeter (4), the switch valve (5) and the annealing cabin (9) through a connecting pipe (6), the nitrogen gas is dried by the dryer (2), the gas pressure is displayed in real time through the flowmeter (4), the switch valve (5) controls the on-off of the nitrogen gas, and the nitrogen gas finally enters a sealing pipe (10) of the annealing cabin (9);
s2, the copper wire enters an annealing chamber (9) to be heated,
filling nitrogen into a sealing tube (10), then enabling copper wires to pass through the sealing tube (10), enabling the copper wires to pass through the sealing tube (10), enter an annealing cabin (9), and annealing through a first annealing wheel (7) and a second annealing wheel (8); the electrode is annealed by the first annealing wheel (7) and the second annealing wheel (8) to uniformly introduce large current into the copper wire, so that the preheating and heating of the copper wire are realized; during preheating, heating the copper wire to 250 ℃; heating the copper wire to 500-550 ℃ to recrystallize the copper wire; the heating section is protected by nitrogen to prevent the copper wire from being oxidized,
and S3, cooling the copper wire by water to finish the annealing process.
2. The method for drawing and annealing the copper wire according to claim 1, wherein: the sealing tube (10) is of a double-layer structure, a bakelite tube is arranged in the rectangular sealing body, and nitrogen is filled into the bakelite tube.
3. The method for drawing and annealing the copper wire according to claim 2, wherein: the bakelite pipe is formed by connecting a plurality of short pipes, and the connecting port adopts a 0-shaped sealing ring.
4. The method for drawing and annealing the copper wire according to claim 1, wherein: the connecting pipe (6) is a galvanized steel pipe.
5. The method for drawing and annealing copper wire according to any of claims 1 to 4, characterized in that: and a pressure reducing valve (3) is arranged on the connecting pipe (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911162059.XA CN110777310A (en) | 2019-11-25 | 2019-11-25 | Copper wire drawing and annealing method |
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| CN201911162059.XA CN110777310A (en) | 2019-11-25 | 2019-11-25 | Copper wire drawing and annealing method |
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| CN110777310A true CN110777310A (en) | 2020-02-11 |
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| CN201911162059.XA Pending CN110777310A (en) | 2019-11-25 | 2019-11-25 | Copper wire drawing and annealing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116377355A (en) * | 2023-01-30 | 2023-07-04 | 安徽赛丽金属科技有限公司 | Copper wire annealing and tempering equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56166364A (en) * | 1980-05-24 | 1981-12-21 | Sumitomo Electric Ind Ltd | Cold working method for copper base alloy |
| CN102592753A (en) * | 2012-03-27 | 2012-07-18 | 江西圣达威电工材料有限公司 | Production method for improving flexibility of enameled copper round wire |
| US20150354023A1 (en) * | 2014-06-09 | 2015-12-10 | Ems Engineered Materials Solutions, Llc | Method to produce composite material with a hard inner layer with deep draw capability |
| CN205710850U (en) * | 2016-04-27 | 2016-11-23 | 鹰潭瑞鑫铜业有限公司 | A kind of oxidation of copper wire wire drawing and annealing |
| CN208240410U (en) * | 2018-05-30 | 2018-12-14 | 金杯塔牌电缆有限公司 | The dedicated automation nitrogen protection device of multiple drawing machine annealing |
-
2019
- 2019-11-25 CN CN201911162059.XA patent/CN110777310A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56166364A (en) * | 1980-05-24 | 1981-12-21 | Sumitomo Electric Ind Ltd | Cold working method for copper base alloy |
| CN102592753A (en) * | 2012-03-27 | 2012-07-18 | 江西圣达威电工材料有限公司 | Production method for improving flexibility of enameled copper round wire |
| US20150354023A1 (en) * | 2014-06-09 | 2015-12-10 | Ems Engineered Materials Solutions, Llc | Method to produce composite material with a hard inner layer with deep draw capability |
| CN205710850U (en) * | 2016-04-27 | 2016-11-23 | 鹰潭瑞鑫铜业有限公司 | A kind of oxidation of copper wire wire drawing and annealing |
| CN208240410U (en) * | 2018-05-30 | 2018-12-14 | 金杯塔牌电缆有限公司 | The dedicated automation nitrogen protection device of multiple drawing machine annealing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116377355A (en) * | 2023-01-30 | 2023-07-04 | 安徽赛丽金属科技有限公司 | Copper wire annealing and tempering equipment |
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Application publication date: 20200211 |
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