CN101665966A - Electroplating preparation method of copper-clad aluminium bars - Google Patents
Electroplating preparation method of copper-clad aluminium bars Download PDFInfo
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- CN101665966A CN101665966A CN200910035288A CN200910035288A CN101665966A CN 101665966 A CN101665966 A CN 101665966A CN 200910035288 A CN200910035288 A CN 200910035288A CN 200910035288 A CN200910035288 A CN 200910035288A CN 101665966 A CN101665966 A CN 101665966A
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Abstract
The invention relates to the manufacturing technology of power transmission conducting bars, in particular to an electroplating preparation method of copper-clad aluminium bars, which comprises the following steps: 1. preparing an aluminium bar, and drawing the aluminium bar to achieve the required size by a mould; 2. washing the aluminium bar with alkali; 3. preliminarily copperplating the aluminium bar washed with the alkali; 4. putting the aluminium bar in a main plating bath for copper sulphate copperplating: continuously blowing the surface of a workpiece in the electroplating process; 5.moving the plated product to a rinse bath and cleanly rinsing the plated product in running clean water; 6. drawing the electroplated product by a dimensioning mould to lead the size of the product to reach requirements; and 7. annealing the drawn product at the annealing temperature of 330-335 DEG C, preserving heat for 5 hours and then carrying out furnace cooling. The conducting bar products obtained by the method have smooth copperplating surfaces, different bimetallic separation in the processing process and low manufacturing cost.
Description
Technical field
The present invention relates to transmit electricity and use the manufacturing technology of busbar, specifically is a kind of electroplating preparation method of copper clad aluminum wire.
Background technology
In recent years, the manufacturing of transmission facility (as high and low voltage switch cabinet, high-and-low-voltage bus way etc.) and use growingly to the demand of copper bar, and the Mineral resources of copper are reducing year by year, cause the copper valency to rise steadily in price in recent years, have increased the cost of device fabrication.For reducing cost, the substitute products that constantly occur copper on market are compiled knowledge fine rule, copper cladded aluminum-magnesium alloy wire (seeing Chinese patent 200510040343.1) etc. as copper sheathed steel, and making product with a spot of copper and other melts combine comes instead of copper, to reduce the consumption of copper, reduce cost.Wherein the incipient copper clad aluminum wire in market uses the making method of coating method, be to use diameter 20-60mm, the liquid aluminium that casting is dissolved in the round copper pipe of wall thickness 0.5-2mm (different specifications adopts corresponding diameter and wall thickness), be pressed into the square-section by the heating edging then, about 2 double-lengths of drawing (determining physical dimension) after annealing is promptly finished production again.Make the busbar product with this method, have following defective:
1, its copper content is still bigger, the material cost height, and its cupric weight ratio is that about 40% (proportion is 3.63-4g/cm
3), in heating edging pressure and drawing process " dew aluminium " phenomenon can appear if the copper pipe production of adopting wall thickness to reduce reduces the copper consumption, for the content that guarantees not " dew aluminium " copper can not reduce again;
2, because the molten molten point of copper greater than aluminium, two kinds of intermetallics can not fuse together in the temperature that aluminium dissolves, and two kinds intermetallic inevitable very poor in conjunction with fastness, produce the rear section finished product from the section visible gap, even the finished product section is not seen portioned product two kinds of metals in shearing, bending and punching process in slit and is very easily separated yet, and there is air will produce cupric oxide and aluminum oxide and cause between bimetal and forms resistance between bimetal, there is the long-time energising of resistance extraordinaryly to generate heat, and then causes potential safety hazard.
Though adopt the method for aluminium row surface electrical copper facing can form the less and two kinds of busbar products that melts combine is fine and close of cupric weight ratio, but conventional Electroplating Production method is directly used in the production of copper-aluminum compound conductive bar and still exists and much be difficult to the problem that overcomes, as: electroplate that to finish rear surface copper layer coarse, matt, rough; Product is electroplated bending surface, good back copper layer and is prone to cracking.
Summary of the invention
The object of the invention provides that a kind of copper coating is smooth, the electroplating preparation method of the copper clad aluminum wire of not easily separated, the low cost of manufacture of bimetal in the course of processing.
The electroplating preparation method of copper clad aluminum wire of the present invention may further comprise the steps:
Step 1 prepares thick 1-20mm, wide 20-300mm, the aluminium row of round edge, make the back and being drawn to required size with mould;
Step 2, aluminium row is inserted alkaline solution of sodium hydroxide soak alkali cleaning, soak time 5-10 minute, solution temperature was 20-40 degree centigrade in the alkaline bath, the zone of oxidation of clean surface and foul drain into aluminium in the Rinsing Area rapidly after finishing and rinse well with flowing water;
Step 3 is put into pre-coating bath rapidly with the aluminium of alkali cleaning row and is carried out pre-copper facing, slings after pre-copper facing is finished to put into Rinsing Area and rinse well;
Step 4 is become owner of coating bath with pre-copper-plated aluminium discharging and is carried out copper sulfate copper facing, and main plating requires:
A. sun level electrolysis copper coin is tiled in the bottom of coating bath;
B. between anode electrolysis copper coin and work, the gas blow pipe that stirs usefulness is set, is provided with on the gas blow pipe, and feeding pressurized air is uninterruptedly blown over against a plurality of gas holes on aluminium row's surface;
C. add brightening agent in electroplate liquid, addition is determined by the technical requirements of concrete brightening agent product;
D. current density: be aluminium row surface-area 4.3-5.0A/dm
2
E. temperature: 30-40 degree centigrade;
F. the main plating time: 2～5 hours;
It is clean that step 5, the product that plating is good move to rinse bath rinsing in the clear water that flows;
Step 6 is carried out drawing with the product after electroplating with the mould of scale, makes product size reach requirement; The drawing size surplus remains on below the 0.5mm;
Step 7 is annealed to the product after the drawing, and 330～335 degrees centigrade of annealing temperatures are incubated furnace cooling after 5 hours.
Gas hole is arranged on the whole length direction at aluminium and is distributed in the above-mentioned steps four, gas hole diameter 0.6～1.2mm, pitch of holes 4～6mm, air blowing air pressure 0.6Mpa/cm
2
The copper clad aluminum wire that method of the present invention obtains can be applicable to low pressure, high-tension distribution box, switching cabinet electric control box, bus relay system, panel board, high intermediate frequency heating installation, storage battery connection, bimetal joint etc. locate to do conductor, its use cost is low, in of the service requirements of some art index near the copper products technology, be the substitute products preferably of copper bar, instead of copper can be saved 50% cost, and especially on high-low pressure suite of equipment and the bus mains system, application prospect is extensive.By blowing the product surface copper sulfate bath is stirred in the plating, the electrolytic copper that product surface is plated is evenly distributed, the internal stress of coating is (two kinds of metals do not ftracture when making annealing back shearing, bending and punching) evenly, and are as bright as a sixpence, guaranteed that finished surface does not have vaporific and particulate state.Compare its advantage is embodied in traditional product:
1, quality-advantage: two kinds of metals do not ftracture and do not separate in the courses of processing such as shearing, bending and punching.The copper clad aluminum wire of can, coating is difficult to reach above-mentioned requirements.
2, proportion advantage: proportion 3.0g/cm
3, be 1/3 of copper, lower more than 20% than the copper clad aluminum wire that coats.
3, current capacity advantage: because the skin effect problem of medium-high frequency and AC current, the naked current capacity that electrochemical plating make cupric weight ratio 15% copper clad aluminum wire is about 83% of a fine copper.
4, cost advantage: compare with copper bar, identical current capacity is cost-saved at least more than 38%.
Embodiment
Following steps are passed through in the enforcement of the inventive method successively:
Step 1 prepares thick 10mm, wide 100mm, and length is the aluminium row of the round edge of 6.1m, makes the back and is drawn to required size with mould;
Step 2 is inserted alkaline solution of sodium hydroxide with aluminium row and is soaked alkali cleaning, soaks 10 minutes, and solution temperature is 35 degrees centigrade in the alkaline bath, and the zone of oxidation of clean surface and foul drain into aluminium in the Rinsing Area rapidly after finishing and rinse well with flowing water;
Step 3 is put into pre-coating bath rapidly with the aluminium of alkali cleaning row and is carried out pre-copper facing, and pre-copper facing can be adopted traditional sodium cyanide copper facing or nickel depositing process, slings after pre-copper facing is finished to put into Rinsing Area and rinse well.
Step 4 is become owner of coating bath with pre-copper-plated aluminium discharging and is carried out copper sulfate copper facing, and main plating requires:
A, sun level electrolysis copper coin are tiled in the bottom of coating bath;
B, between anode electrolysis copper coin and work, the gas blow pipe that stirs usefulness is set, is provided with on the gas blow pipe, and feed pressurized air and uninterruptedly blow over against a plurality of gas holes on aluminium row's surface; Gas hole is arranged on the whole length direction at aluminium and is distributed, gas hole diameter 1mm, pitch of holes 5mm, air blowing air pressure 0.6Mpa/cm
2
C, add brightening agent in electroplate liquid, addition is determined by the technical requirements of concrete brightening agent product;
D, current density: be aluminium row surface-area 4.3-5.0A/dm
2
E, temperature: 30-40 degree centigrade;
F, main plating time: 2～5 hours;
Thickness of coating is advisable to guarantee cupric weight ratio to 13～18%.
It is clean that step 5, the product that plating is good move to rinse bath rinsing in the clear water that flows;
Step 6 is carried out drawing with the product after electroplating with the mould of scale, makes product size reach requirement; The drawing size surplus remains on below the 0.5mm;
Step 7 is annealed to the product after the drawing, and 330 degrees centigrade of annealing temperatures are incubated furnace cooling after 5 hours.
Because the copper on aluminium row surface has produced internal stress in the process of plating and drawing, shearing this moment, bending and perforation processing can ftracture, eliminate internal stress so carry out annealing process, but the annealing temperature 520-550 of copper degree centigrade, be out of shape probably as words product intermediary aluminium, and cause product rejection by the annealing process annealing temperature of copper.Mainly contain in the copper bar annealing process: vacuum oven is heated and will be incubated 1.5-3 hour to certain temperature, cools to blow-on below 80 degrees centigrade then with the furnace, mainly is for the fining metal crystal grain, makes it stable mutually, thereby reduces internal stress.Through overtesting, method of the present invention has been determined that annealing temperature is the highest and can only have been fixed in 350 degrees centigrade, otherwise product is out of shape and scraps, through a large amount of tests, heat to 330 degrees centigrade, prolong shear after cooling to 50 degrees centigrade with the furnace after the soaking time to 5 hour, bending and punching, test products does not ftracture, does not separate.
Claims (2)
1, a kind of electroplating preparation method of copper clad aluminum wire, it is characterized in that: it may further comprise the steps,
Step 1 prepares thick 1-20mm, wide 20-300mm, the aluminium row of round edge, make the back and being drawn to required size with mould;
Step 2, aluminium row is inserted alkaline solution of sodium hydroxide soak alkali cleaning, soak time 5-10 minute, solution temperature was 20-40 degree centigrade in the alkaline bath, the zone of oxidation of clean surface and foul drain into aluminium in the Rinsing Area rapidly after finishing and rinse well with flowing water;
Step 3 is put into pre-coating bath rapidly with the aluminium of alkali cleaning row and is carried out pre-copper facing, slings after pre-copper facing is finished to put into Rinsing Area and rinse well;
Step 4 is become owner of coating bath with pre-copper-plated aluminium discharging and is carried out copper sulfate copper facing, and main plating requires:
A. sun level electrolysis copper coin is tiled in the bottom of coating bath;
B. between anode electrolysis copper coin and work, the gas blow pipe that stirs usefulness is set, is provided with on the gas blow pipe, and feeding pressurized air is uninterruptedly blown over against a plurality of gas holes on aluminium row's surface;
C. add brightening agent in electroplate liquid, addition is determined by the technical requirements of concrete brightening agent product;
D. current density: be aluminium row surface-area 4.3-5.0A/dm
2
E. temperature: 30-40 degree centigrade;
F. the main plating time: 2～5 hours;
It is clean that step 5, the product that plating is good move to rinse bath rinsing in the clear water that flows;
Step 6 is carried out drawing with the product after electroplating with the mould of scale, makes product size reach requirement; The drawing size surplus remains on below the 0.5mm;
Step 7 is annealed to the product after the drawing, and 330～335 degrees centigrade of annealing temperatures are incubated furnace cooling after 5 hours.
2, the electroplating preparation method of copper clad aluminum wire according to claim 1 is characterized in that: gas hole is arranged on the whole length direction at aluminium and is distributed in the step 4, gas hole diameter 0.6～1.2mm, pitch of holes 4～6mm, air blowing air pressure 0.6Mpa/cm
2
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100352885A CN101665966B (en) | 2009-09-25 | 2009-09-25 | Electroplating preparation method of copper-clad aluminium bars |
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| CN2009100352885A CN101665966B (en) | 2009-09-25 | 2009-09-25 | Electroplating preparation method of copper-clad aluminium bars |
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| CN101665966B CN101665966B (en) | 2011-05-25 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102063968A (en) * | 2010-11-30 | 2011-05-18 | 苏州市南方欣达双金属材料有限公司 | Method for processing bimetallic conducting bar |
| CN102409377A (en) * | 2011-11-23 | 2012-04-11 | 江苏大学 | Method and device for manufacturing copper/aluminum compound conductive bar by plating |
| CN102409376A (en) * | 2011-11-23 | 2012-04-11 | 江苏大学 | Method and device for manufacturing copper/aluminum compound conductive bar by plating |
| CN102418128A (en) * | 2011-11-23 | 2012-04-18 | 江苏大学 | Electroplating production method and device for copper/aluminum composite conducting bar |
| CN103367895A (en) * | 2013-07-08 | 2013-10-23 | 温州格洛博电子有限公司 | Radio frequency identification copper-plated antenna and preparation method thereof |
| CN104805392A (en) * | 2015-04-02 | 2015-07-29 | 河南平高电气股份有限公司 | Cooper-aluminum composite and preparation method |
| CN104805483A (en) * | 2015-05-15 | 2015-07-29 | 国家电网公司 | Preparation method for copper bus bar with high strength and high electrical conductivity |
| CN111769300A (en) * | 2020-02-28 | 2020-10-13 | 上海市机电设计研究院有限公司 | Preparation method of aluminum-based copper-plated current collecting plate for all-vanadium flow battery |
-
2009
- 2009-09-25 CN CN2009100352885A patent/CN101665966B/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102063968A (en) * | 2010-11-30 | 2011-05-18 | 苏州市南方欣达双金属材料有限公司 | Method for processing bimetallic conducting bar |
| CN102409377A (en) * | 2011-11-23 | 2012-04-11 | 江苏大学 | Method and device for manufacturing copper/aluminum compound conductive bar by plating |
| CN102409376A (en) * | 2011-11-23 | 2012-04-11 | 江苏大学 | Method and device for manufacturing copper/aluminum compound conductive bar by plating |
| CN102418128A (en) * | 2011-11-23 | 2012-04-18 | 江苏大学 | Electroplating production method and device for copper/aluminum composite conducting bar |
| CN102409376B (en) * | 2011-11-23 | 2014-05-28 | 江苏大学 | Method and device for manufacturing copper/aluminum compound conductive bar by plating |
| CN102418128B (en) * | 2011-11-23 | 2014-05-28 | 江苏大学 | Electroplating production method and device for copper/aluminum composite conducting bar |
| CN103367895A (en) * | 2013-07-08 | 2013-10-23 | 温州格洛博电子有限公司 | Radio frequency identification copper-plated antenna and preparation method thereof |
| CN103367895B (en) * | 2013-07-08 | 2015-10-14 | 温州格洛博电子有限公司 | A kind of less radio-frequency copper facing antenna and preparation method thereof |
| CN104805392A (en) * | 2015-04-02 | 2015-07-29 | 河南平高电气股份有限公司 | Cooper-aluminum composite and preparation method |
| CN104805483A (en) * | 2015-05-15 | 2015-07-29 | 国家电网公司 | Preparation method for copper bus bar with high strength and high electrical conductivity |
| CN111769300A (en) * | 2020-02-28 | 2020-10-13 | 上海市机电设计研究院有限公司 | Preparation method of aluminum-based copper-plated current collecting plate for all-vanadium flow battery |
| CN111769300B (en) * | 2020-02-28 | 2023-06-30 | 上海市机电设计研究院有限公司 | Preparation method of aluminum-based copper-plated current collector for all-vanadium redox flow battery |
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| CN101665966B (en) | 2011-05-25 |
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Effective date of registration: 20201211 Address after: 2 / F, 103 Zhongshan West Road, Runzhou District, Zhenjiang City, Jiangsu Province 212000 Patentee after: Zhenjiang aixien Technology Co.,Ltd. Address before: 212021 Private Development Zone, Jiangsu, Zhenjiang Patentee before: JIANGSU GUANGQING ELECTRON MATERIALS Co.,Ltd. (JOINT VENTURE) |
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