CN107414408B - A kind of production method of transformer copper strips - Google Patents
A kind of production method of transformer copper strips Download PDFInfo
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- CN107414408B CN107414408B CN201710700289.1A CN201710700289A CN107414408B CN 107414408 B CN107414408 B CN 107414408B CN 201710700289 A CN201710700289 A CN 201710700289A CN 107414408 B CN107414408 B CN 107414408B
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- copper
- annealing
- milling
- copper strips
- strip billet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P13/00—Making metal objects by operations essentially involving machining but not covered by a single other subclass
Abstract
The present invention provides a kind of production methods of transformer copper strips, it includes continuous up-casting, continuously extruded, milling face, rolling, welding, milling face, high annealing, rolling, low-temperature annealing, Cleaning and Passivation, aligning, cutting, chamfering, the main method by welding, the width for improving copper strips, meets the width requirement of transformer copper strips.
Description
Technical field
The present invention relates to the field of metal processing more particularly to a kind of production methods of transformer copper strips.
Background technique
With the development of power industry, the capacity of single transformer is increasingly increased, and therefore, power industry is held according to increase
Amount saves material, raises labour productivity, reduces cost, reduces the principle for using volume, proposes to improve to the structure of transformer
It is required that improve transformer station high-voltage side bus efficiency and reliability.Traditional transformer using wire winding structure type and pure copper strips around
The transformer of band winding construction form made of system, with high dynamic, thermal stability, especially in the short-circuit state more
Obviously, while its space utilization rate is high, and manufacturing process is simple, can automatic winding, be easy to implement mechanization production, wind high-efficient
Many advantages, such as uniform heat distribution, small in size, light-weight, capacity is big, saves material, and energy-saving effect is good, and no-load loss is small,
The transformer be used widely in transmission & distribution engineering, and will gradually replace wire winding structure.
The transformer of copper strips winding needs the width of copper strips generally in 500mm or more, but with the increase of copper strips width,
It is more demanding to the production equipment of copper strips, such as produce the copper strips of 1000mm, it is necessary to the ingot casting of 1000mm or more is cast, it is right in this way
Equipment investment and equipment performance propose higher requirement.And continuously extruded oxygen-free copper stripe manufacture new technology is a kind of efficient, low
Consumption, a kind of energy-efficient production method of copper plate/strip, but the limited width of continuous extrusion production copper strip billet, only 300 ~ 400mm,
Existing transformer is not met by the requirement of large-width copper strip.
Summary of the invention
Problem in view of the prior art, the present invention provide a kind of production method of transformer copper strips, and use is continuously extruded
Technology manufactures copper strips blank, meets transformer to the requirement of large-width copper strip.
To achieve the above object, the technical solution used in the present invention is:
(1) continuous up-casting: using A grades of tough cathodes as raw material, will melt in smelting apparatus after its pre-heating drying, use
Charcoal, graphite flakes cover copper liquid surface, using drawing copper bar on traction link seat；The temperature of smelting furnace is 1150 DEG C, using drying
Charcoal covering, charcoal cladding thickness 200mm；The temperature of holding furnace is 1150 DEG C, is covered using graphite flakes, cladding thickness
50mm；On draw copper bar speed 300mm/min, diameter Ф 30mm, according to mass percent meter, the copper content for above drawing copper bar is greater than
99.999%, 3 ~ 5ppm of oxygen content, sulfur content are less than 2ppm, and phosphorus content is less than 2ppm, and iron content is less than 2ppm, and conductivity is greater than
102.5%IACS。
(2) continuously extruded: using the copper bar prepared in step (1) as raw material, copper strip billet being produced using continuously extruded unit；Even
Continuous extruder revolving speed is 5r/min, and the width of copper strip billet is 300 ~ 400mm；The passage length of continuous extrusion copper strip billet cavity is
150mm, cavity inner temperature are greater than 770 DEG C, and cavity internal pressure is greater than 1500MPa, and the gap of cavity and extruding wheel is 1.15mm, chamber
Body is first preheated using preceding, and preheating temperature is 490 DEG C, and preheating time is 6 hours；Continuous extrusion copper strip billet is with mold thickness
100mm, the modular angle of mold are 15 °, and the sizing strip length of mold is 25mm.
(3) it mills face: the side of copper strip billet being subjected to milling face, the width of side milling is 1.1~2.5mm；Milling cutter revolving speed 500
~550r/min, milling cutter diameter 200mm, copper strip billet 10~15m/min of Milling Speed, the width tolerance of copper strip billet is after milling
±0.1mm。
(4) weld: the continuous extrusion copper strip billet behind milling face is longitudinally welded, is mentioned by the method welded using agitating friction
The width of high copper strip billet；The revolving speed of agitating friction weldering is 500r/min, weldering speed 50mm/min.
(5) mill face: the upper and lower surface of copper strip billet be subjected to milling face, copper strip billet upper and lower surface milling with a thickness of 0.2mm, milling
Longitudinal thickness tolerance is less than after swivel speed 650r/min, milling cutter diameter 200mm, copper strip billet Milling Speed 7m/min, milling
Transverse gage tolerance is less than 0.03mm after 0.05mm, milling.
(6) it rolls: two passes being carried out to the copper strips blank behind milling face using cold mill complex, rolling general working rate is 60
~70%.
(7) high annealing: annealing to the copper strips after rolling using bright annealing equipment, and 650 ~ 750 DEG C of annealing temperature,
Annealing time 5h, using 75%H2+25%N2Mixed gas as protective gas, copper strip billet welding region is eliminated after high annealing
Non-uniform grain structure.
(8) it rolls: multi- pass rolling being carried out to copper strips after annealing at a high temperature using cold mill complex, rolling pass working modulus is
36~45%, the pass reduction 15% of the last one passage.
(9) low-temperature annealing: annealing to the copper strips after rolling using bright annealing equipment, and 280 ~ 300 DEG C of annealing temperature,
Annealing time 5h, using 75%H2+25%N2Mixed gas as protective gas, the conductivity of copper strips is greater than 102.5% after annealing
IACS, the grain size of copper strips are 0.010mm ~ 0.012mm, and copper strips tensile strength is 225 ~ 235MPa, yield strength is 85 ~
95MPa, elongation percentage are 50 ~ 55%.
(10) copper strips after low-temperature annealing Cleaning and Passivation: is subjected to Cleaning and Passivation.
(11) it aligns: template aligning is carried out to copper strips, forward pull control exists in 0.6-0.7KN, backward pull control when aligning
0.35-0.55KN, the elongation control of copper strips is within 0.5%, and the template of copper strips is less than 5I after aligning, and thickness deviation is not more than
±0 .001mm。
(12) it cuts: copper strips being cut using cutting apparatus.
(13) chamfering: using chamfering device, copper strips carried out chamfered, and treated, and copper belt part is round edge.
Technical solution provided by the invention the utility model has the advantages that
1. controlling the ingredient of copper strips, its copper content is made to be greater than 99.999%, 3 ~ 5ppm of oxygen content, sulfur content is less than 2ppm,
Phosphorus content is less than 2ppm, and iron content is less than 2ppm, is conducive to the welding between copper strips blank.
2. using high-temperature annealing process, copper strip billet welding region grain structure is non-uniform after elimination agitating friction weldering is asked
Topic.
3. two or more continuous extrusion copper strip billet material is carried out longitudinal weldering using the method for agitating friction weldering
It connects, improves the width of copper strip billet, meet the requirement of transformer copper strip.
Specific embodiment
Example 1
(1) continuous up-casting: using A grades of tough cathodes as raw material, will melt in smelting apparatus after its pre-heating drying, use
Charcoal, graphite flakes cover copper liquid surface, using drawing copper bar on traction link seat；The temperature of smelting furnace is 1150 DEG C, using drying
Charcoal covering, charcoal cladding thickness 200mm；The temperature of holding furnace is 1150 DEG C, is covered using graphite flakes, cladding thickness
50mm；On draw copper bar speed 300mm/min, diameter Ф 30mm, according to mass percent meter, the copper content for above drawing copper bar is greater than
99.999%, oxygen content 3ppm, sulfur content 1ppm, phosphorus content 1ppm, iron content 1ppm, conductivity 102.8%IACS.
(2) continuously extruded: using the copper bar prepared in step (1) as raw material, copper strip billet being produced using continuously extruded unit；Even
Continuous extruder revolving speed is 5r/min, and the width of copper strip billet is 350mm；The passage length of continuous extrusion copper strip billet cavity is
150mm, cavity inner temperature are greater than 770 DEG C, and cavity internal pressure is greater than 1500MPa, and the gap of cavity and extruding wheel is 1.15mm, chamber
Body is first preheated using preceding, and preheating temperature is 490 DEG C, and preheating time is 6 hours；Continuous extrusion copper strip billet is with mold thickness
100mm, the modular angle of mold are 15 °, and the sizing strip length of mold is 25mm.
(3) it mills face: the side of copper strip billet is subjected to milling face；The width of side milling is 2.0mm；Milling cutter revolving speed 500r/
Min, milling cutter diameter 200mm, copper strip billet Milling Speed 10m/min, the width tolerance of copper strip billet is ± 0.1mm after milling.
(4) weld: the method welded using agitating friction is longitudinally welded the continuous extrusion copper strip billets of volume three behind milling face
It connects, the width of copper strip billet is 1038mm after welding；The revolving speed of agitating friction weldering is 500r/min, weldering speed 50mm/min.
(5) mill face: the upper and lower surface of copper strip billet be subjected to milling face, copper strip billet upper and lower surface milling with a thickness of 0.2mm, milling
Longitudinal thickness tolerance is less than after swivel speed 650r/min, milling cutter diameter 200mm, copper strip billet Milling Speed 7m/min, milling
Transverse gage tolerance is less than 0.03mm after 0.05mm, milling.
(6) it rolls: two passes being carried out to the copper strips blank behind milling face using cold mill complex, rolling general working rate is
65%。
(7) high annealing: annealing to the copper strips after rolling using bright annealing equipment, and 650 DEG C of annealing temperature, annealing
Time 5h, using 75%H2+25%N2Mixed gas that copper strip billet welding region is eliminated as protective gas, after high annealing is uneven
Even grain structure.
(8) it rolls: multi- pass rolling is carried out to copper strips after annealing at a high temperature using cold mill complex；Rolling pass working modulus is
45%, the pass reduction 15% of the last one passage.
(9) low-temperature annealing: annealing to the copper strips after rolling using bright annealing equipment, and 280 DEG C of annealing temperature, annealing
Time 5h；Using 75%H2+25%N2Mixed gas as protective gas, the conductivity of copper strips is greater than 102.5%IACS after annealing,
The grain size of copper strips is 0.010mm ~ 0.012mm, and copper strips tensile strength is 225 ~ 235MPa, and yield strength is 85 ~ 95MPa, is prolonged
Stretching rate is 50 ~ 55%.
(10) copper strips after low-temperature annealing Cleaning and Passivation: is subjected to Cleaning and Passivation.
(11) it aligns: template aligning is carried out to copper strips, forward pull control exists in 0.6-0.7KN, backward pull control when aligning
0.35-0.55KN, the elongation control of copper strips is within 0.5%, and the template of copper strips is less than 5I after aligning, and thickness deviation is not more than
±0 .001mm。
(12) it cuts: copper strips being cut using cutting apparatus.
(13) chamfering: using chamfering device, copper strips carried out chamfered, and treated, and copper belt part is round edge.
Claims (1)
1. a kind of production method of transformer copper strips, it is characterised in that the production method includes the following steps:
(1) it continuous up-casting: using A grades of tough cathodes as raw material, will be melted in smelting apparatus after its pre-heating drying, using wood
Charcoal, graphite flakes cover copper liquid surface, using drawing copper bar on traction link seat；The temperature of smelting furnace is 1150 DEG C, using drying
Charcoal covering, charcoal cladding thickness 200mm；The temperature of holding furnace is 1150 DEG C, is covered using graphite flakes, cladding thickness
50mm；On draw copper bar speed 300mm/min, diameter Ф 30mm, according to mass percent meter, the copper content for above drawing copper bar is greater than
99.999%, 3 ~ 5ppm of oxygen content, sulfur content are less than 2ppm, and phosphorus content is less than 2ppm, and iron content is less than 2ppm, and conductivity is greater than
102.5%IACS；
(2) continuously extruded: using the copper bar prepared in step (1) as raw material, copper strip billet being produced using continuously extruded unit；It is continuous to squeeze
Press revolving speed is 5r/min, and the width of copper strip billet is 300 ~ 400mm；The passage length of continuous extrusion copper strip billet cavity is
150mm, cavity inner temperature are greater than 770 DEG C, and cavity internal pressure is greater than 1500MPa, and the gap of cavity and extruding wheel is 1.15mm, chamber
Body is first preheated using preceding, and preheating temperature is 490 DEG C, and preheating time is 6 hours；Continuous extrusion copper strip billet is with mold thickness
100mm, the modular angle of mold are 15 °, and the sizing strip length of mold is 25mm；
(3) it milling face: the side of copper strip billet is subjected to milling face, the width of side milling is 1.1~2.5mm, milling cutter revolving speed 500~
550r/min, milling cutter diameter 200mm, copper strip billet 10~15m/min of Milling Speed, after milling the width tolerance of copper strip billet be ±
0.1mm；
(4) weld: the method welded using agitating friction is longitudinally welded the continuous extrusion copper strip billet behind milling face, improves copper
The width of made-up belt, the revolving speed of agitating friction weldering are 500r/min, weldering speed 50mm/min；
(5) mill face: the upper and lower surface of copper strip billet be subjected to milling face, copper strip billet upper and lower surface milling with a thickness of 0.2mm, milling cutter turns
After fast 650r/min, milling cutter diameter 200mm, copper strip billet Milling Speed 7m/min, milling longitudinal thickness tolerance be less than 0.05mm,
Transverse gage tolerance is less than 0.03mm after milling；
(6) roll: using cold mill complex to behind milling face copper strips blank carry out two passes, rolling general working rate be 60~
70%；
(7) high annealing: annealing to the copper strips after rolling using bright annealing equipment, and 650 ~ 750 DEG C of annealing temperature, annealing
Time 5h；Using 75%H2+25%N2Mixed gas as protective gas；It is uneven that copper strip billet welding region is eliminated after high annealing
Even grain structure；
(8) roll: using cold mill complex to copper strips after annealing at a high temperature carry out multi- pass rolling, rolling pass working modulus be 36~
45%, the pass reduction 15% of the last one passage；
(9) low-temperature annealing: annealing to the copper strips after rolling using bright annealing equipment, and 280 ~ 300 DEG C of annealing temperature, annealing
Time 5h；Using 75%H2+25%N2Mixed gas as protective gas, the conductivity of copper strips is greater than 102.5%IACS after annealing,
The grain size of copper strips is 0.010mm ~ 0.012mm, and copper strips tensile strength is 225 ~ 235MPa, and yield strength is 85 ~ 95MPa, is prolonged
Stretching rate is 50 ~ 55%；
(10) copper strips after low-temperature annealing Cleaning and Passivation: is subjected to Cleaning and Passivation；
(11) it aligns: template aligning is carried out to copper strips, forward pull control is controlled in 0.6-0.7KN, backward pull in 0.35- when aligning
0.55KN, the elongation control of copper strips is within 0.5%；After aligning the template of copper strips be less than 5I, thickness deviation no more than ±
0.001mm；
(12) it cuts: copper strips being cut using cutting apparatus；
(13) chamfering: using chamfering device, copper strips carried out chamfered, and treated, and copper belt part is round edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710700289.1A CN107414408B (en) | 2017-08-16 | 2017-08-16 | A kind of production method of transformer copper strips |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710700289.1A CN107414408B (en) | 2017-08-16 | 2017-08-16 | A kind of production method of transformer copper strips |
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| CN107414408A CN107414408A (en) | 2017-12-01 |
| CN107414408B true CN107414408B (en) | 2019-02-01 |
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| CN109227051A (en) * | 2018-10-25 | 2019-01-18 | 浙江星康铜业有限公司 | A kind of anticorrosive anti-wear copper strips and preparation method thereof |
| CN110076211A (en) * | 2019-05-13 | 2019-08-02 | 浙江力博实业股份有限公司 | A kind of preparation method of the high Erichsen number copper strips of heat exchanger |
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| CN101633103A (en) * | 2008-07-23 | 2010-01-27 | 杨新发 | Metallic indifference lapping machine with infinitely broadening property |
| EP2894941A3 (en) * | 2014-01-10 | 2015-11-11 | Strip Tinning Limited | Busbars |
| CN106001160A (en) * | 2016-08-05 | 2016-10-12 | 徐高磊 | Production technology of high-purity and high-conductivity oxygen-free copper strips |
| CN106077126A (en) * | 2016-08-05 | 2016-11-09 | 徐高磊 | A kind of production technology of copper magnesium alloy band |
| CN106180248A (en) * | 2016-08-05 | 2016-12-07 | 徐高磊 | A kind of electrician is by the production technology of phosphor-copper band |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110016706A1 (en) * | 2006-04-19 | 2011-01-27 | Exa Energy Technology Co., Ltd. | Rechargeable battery fabrication method |
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2017
- 2017-08-16 CN CN201710700289.1A patent/CN107414408B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101633103A (en) * | 2008-07-23 | 2010-01-27 | 杨新发 | Metallic indifference lapping machine with infinitely broadening property |
| EP2894941A3 (en) * | 2014-01-10 | 2015-11-11 | Strip Tinning Limited | Busbars |
| CN106001160A (en) * | 2016-08-05 | 2016-10-12 | 徐高磊 | Production technology of high-purity and high-conductivity oxygen-free copper strips |
| CN106077126A (en) * | 2016-08-05 | 2016-11-09 | 徐高磊 | A kind of production technology of copper magnesium alloy band |
| CN106180248A (en) * | 2016-08-05 | 2016-12-07 | 徐高磊 | A kind of electrician is by the production technology of phosphor-copper band |
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Legal Events
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20181220 Address after: 528300 Dongtou Management Zone, Longjiang Town, Shunde District, Foshan City, Guangdong Province Applicant after: Foshan Shunde Donglong Copper Co.,Ltd. Address before: 462414 Ma Gang Formation 5, Jiujie Town, Wuyang County, Luohe City, Henan Province Applicant before: Xu Gaojie |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190201 Termination date: 20210816 |
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| CF01 | Termination of patent right due to non-payment of annual fee |