CN104376897A - Hollow copper-clad aluminum conductor and production method thereof - Google Patents
Hollow copper-clad aluminum conductor and production method thereof Download PDFInfo
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- CN104376897A CN104376897A CN201410653011.XA CN201410653011A CN104376897A CN 104376897 A CN104376897 A CN 104376897A CN 201410653011 A CN201410653011 A CN 201410653011A CN 104376897 A CN104376897 A CN 104376897A
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Abstract
The invention discloses a hollow copper-clad aluminum conductor and a production method of the hollow copper-clad aluminum conductor. The blank of the hollow copper-clad aluminum conductor is a hollow aluminum pipe which is a wire rod, and the wire rod is with certain inner diameter, is wrapped with a copper layer and is of a hollow structure. Meanwhile, the invention provides the production method of the hollow copper-clad aluminum conductor, and relates to the field of production of double-metal wire rods, in particular to a key technology of the hollow copper-clad aluminum conductor. The raw materials used by the production method of the hollow copper-clad aluminum conductor are distinctly different from raw materials used in the traditional solid copper-clad aluminum conductor production, the prior art is improved effectively on the premise that the electrical performance of finished wire rods meets the national standard, the production efficiency and product quality are improved, damage to production equipment can be lowered, and wide application prospects are achieved. Wire rods produced according to the method have good mechanical performance and electrical performance, various parameter tests can meet or be higher than the national standard, and the hollow copper-clad aluminum conductor and the production method of the hollow copper-clad aluminum conductor have wide application prospects in the wire rod production field.
Description
Technical field
The invention belongs to metal wire rod field, be specifically related to hollow type copper-clad aluminum conductor and production method thereof.
Background technology
Copper-clad aluminum conductor is a kind of bimetallic conductor, widely uses in the electrical apparatus, and the fields such as particularly high-frequency signal transmission, high-tension distribution panel, track electric power transfer, have the irreplaceable advantage of other wire.Copper conductor is widely used in electric equipment as excellent conductor, but due to the scarcity of copper resource, its cost is remained high, therefore can only use fine copper wire in high-end devices.The density of copper is comparatively large simultaneously, causes the quality of finished product cable larger.The density of aluminium, less than 1/3rd of copper density, can effectively reduce cable quality.Copper-clad aluminum conductor, under the prerequisite keeping copper cash electric conductivity and mechanical property, more has economical and practical and lightweight advantage compared to fine copper wire, in use often can be used for alternative pure copper wire, farthest reduces costs.
Tradition copper-clad aluminium wire production method comprises drawing after aluminum steel copper facing, aluminium bar outsourcing copper sheet, the method such as core-filled and continuously casted, and the product that aforementioned production method obtains is solid wire rod.
In high-frequency signal transmission, due to the existence of skin effect, electric current is mainly present in the surface of cable, increases with the cable degree of depth, and electric current reduces, and central current is almost nil.Therefore, the cable piece electrical performance that only the good material of certain thickness electric conductivity need be used just can to reach higher at outer surface.This is the theoretical foundation that copper-clad aluminum conductor has practical value.Meanwhile, if inner core density can lower than outer conductive material, so cable overall weight just can obviously lower.The metal material that aluminium is less as density, physical and chemical performance is stablized, conductance is moderate is best selection.
The traditional processing technology of copper-clad aluminum conductor has drawing and core-filled and continuously casted method after aluminum steel copper facing, aluminium bar outsourcing copper sheet.First two method easily makes the copper layer thickness in the copper-clad aluminum conductor of finished product uneven, affects product quality; And core-filled and continuously casted method complex process, can only be used for core fusing point low, the bimetallic wire preparation that outer layer metal fusing point is high, the scope of application is narrower.Aluminum steel copper facing production technology take aluminum steel as negative electrode, copper rod is anode, copper-bath is electrolyte, and the concentration of copper-bath has considerable influence to product quality.With the carrying out produced, the CONCENTRATION DISTRIBUTION of copper-bath is no longer even, causes the outer thickness of coated copper layer of aluminum steel also even, affects product quality; Drawing after aluminium bar outsourcing copper sheet, because blank is solid material, needs larger tension stress in drawing process, and the compression ratio of every time drawing can not excessive, speed can not be too fast.In drawing is produced, material outer layer metal affects comparatively large by factors such as the solid stock stress distribution of self bimetallic, drawing speed, mechanical oscillation, very easily causes core bias, kalamein layer thickness uneven.The particularly former passage of blank drawing, when diameter is larger, eccentric phenomena can be more obvious.Core is eccentric, and when making wire drawing, radial stress is uneven, and increase with drawing number of times, eccentric degree only can be more serious, cannot correct, and even can cause that outer layer metal is damaged, inner core is exposed, has a strong impact on wire quality.But compression ratio is low, drawing speed causes the increase of drawing number of times slowly, production efficiency reduces.Therefore the quality of production and throughput rate can not be taken into account.The open a kind of typical copper-clad aluminium wire production method of number of patent application CN201410120392, publication number CN103903671A, date of application 2014.03.28, carries out drawing after using aluminium bar outsourcing layers of copper, obtains the copper-clad aluminum conductor of dimension.
Up to now, do not see in prior art about the relevant report of hollow copper-clad aluminum conductor.
Summary of the invention
The object of the invention is to for prior art above shortcomings, a kind of hollow type copper-clad aluminum conductor and production method thereof are provided, to improve copper-clad aluminum conductor throughput rate and product quality.
In order to realize above-mentioned purpose of the present invention, the invention provides following technical scheme:
Hollow type copper-clad aluminum conductor, its blank uses hollow aluminum pipe.
As described in hollow type copper-clad aluminum conductor, wherein said hollow type copper-clad aluminum conductor is the wire rod having certain internal diameter, outer wrap layers of copper, hollow structure.
As described in hollow type copper-clad aluminum conductor, the specification of wherein said aluminum pipe with use copper strips or copper pipe match specifications, aluminum pipe label is identical with aluminium bar label, and its specification and length are depending on production equipment and finished wire rod specification requirement.
Present invention also offers the production method of described hollow type copper-clad aluminum conductor, take aluminum pipe as core, and the coated layers of copper of outer surface forms blank, and method for coating and technique do not limit, and coated rear formation has the aluminum-copper duplex metal tube billet of certain hollow diameters.
As described in the production method of hollow type copper-clad aluminum conductor, take aluminum pipe as core, the coated layers of copper of outer surface forms blank, to aluminum-copper duplex metal tube billet drawing technique, obtains the copper-clad aluminum conductor that inside exists certain cavity.
As described in the production method of hollow type copper-clad aluminum conductor, the method device therefor is conventional equipment; Clad material used is conventional material, or selects by demand; Mould therefor is traditional dies, or designs as requested.
As described in the production method of hollow type copper-clad aluminum conductor, wherein said hollow type copper-clad aluminum conductor wire internal hollow parts diameter parameters is as the criterion depending on finished wire rod specifications and characteristics, not affect premised on properties of product; Hollow space diameter is determined by initial blank copper layer thickness, aluminum pipe caliber and wall thickness, and parameter is by calculating and testing decision.
Concrete grammar of the present invention can be described below:
Take aluminum pipe as core, the coated layers of copper of outer surface forms blank, adopts drawing technique, the inner copper-clad aluminum conductor that there is cavity of final realization.The maximum difference of the technology of the present invention and prior art is, blank uses hollow aluminum pipe but not solid aluminum bar, and final formation has the wire rod of certain internal diameter, outer wrap layers of copper, hollow structure.
Take aluminum pipe as core, the layers of copper cladding process of application prior art maturation and drawing process, production standard diameter copper-clad aluminum conductor, can improve quality and the throughput rate of wire rod.Particularly in the starting stage that copper-clad aluminum conductor is produced, material diameter is comparatively large, can adopt the mould of larger compression ratio, and can ensure higher product quality and production efficiency.When diameter is less, adopts the mould of compression ratio identical with solid material, throughput rate and product quality can be ensured when pulling force is less.
In the production of copper-clad aluminum conductor, the specification of raw material and production wire rod determines the total draught of wire rod, because total draught is larger, so be divided into multi-pass to carry out drawing, every time compression ratio determines drawing number of times required in production, number of times number determine production efficiency, use hollow aluminum pipe can improve every time compression ratio as raw material, reduce drawing number of times, improving production efficiency; Secondly, not easily produce bias during bimetal tube drawing, particularly when major diameter, can be good at making inner tubing remain on integral central, outer metal layer thickness is even, does not repeatedly almost have eccentric defect to accumulate after drawing; 3rd, use solid material carry out drawing produce time, in drawing process to the pressure of mould and frictional force larger, the direct result caused is that the life-span of mould is lower, production cost increases, and uses aluminum pipe can reduce the damage to mould as raw material, reduces production cost.
Above-mentioned aluminum pipe, can be with in existing production technology use the tubing that aluminium bar label is identical, its specification and length are not limited, specifically depending on production equipment and finished wire rod specification requirement.In addition the specification of aluminum pipe is used to need mutually to mate with use copper strips or copper pipe specification.
Above-mentioned layers of copper cladding process and drawing process, can use existing equipment, do not need to change; The clad material used is existing material, or selects by demand; The mould used is existing mold, or the mould designed as requested.
Above-mentioned hollow type copper-clad aluminum conductor, do not limit wire internal hollow parts diameter, design parameter is as the criterion depending on finished wire rod specifications and characteristics, not affect premised on properties of product.Hollow space diameter is determined by initial blank copper layer thickness, aluminum pipe caliber and wall thickness, and design parameter is by calculating and testing decision.
The present invention produce product electric property and mechanical property all can reach or higher than national standard, copper and aluminium contact interface can be observed and significantly interpenetrate under metallomicroscope, can form metallic bond, meet national standard between copper and aluminium atom.The every test index of finished product copper-clad aluminum conductor, all can be up to state standards requirement.
The present invention has the following advantages: the core produced using aluminum pipe as copper-clad aluminum conductor, under the prerequisite that product is up to state standards, can effectively enhance productivity, reduce the damage to product and mould in production process, and existing production equipment can be used in, do not need to upgrade equipment, be with a wide range of applications.
Accompanying drawing explanation
Fig. 1 is billet cross section, and 1 is layers of copper, and 2 is aluminium lamination;
Fig. 2 is blank longitudinal profile, and 1 is layers of copper, and 2 is aluminium lamination;
Fig. 3 is blank drawing longitudinal profile, and 1 is layers of copper, and 2 is aluminium lamination, and 3 is drawing direction, and 4 is mould.
Embodiment
In conjunction with embodiments of the invention, content of the present invention to be further described below by accompanying drawing, but not to limit the present invention with this.
Embodiment 1:
With the copper pipe of external diameter 16mm internal diameter 14mm wall thickness 1mm for outsourcing material, with the aluminum pipe of external diameter 13mm internal diameter 9.4mm wall thickness 1.8mm for core, aluminum pipe is inserted in copper pipe composition blank.Obtain the wire rod of each specification after metal drawing drawing, choose sample to wire rod after the drawing of each specification mould, measure each parameter, each parameter measurement is averaged for 10 times, and table 1 is each parameter measurement mean value.
The wire rod parameter measurement mean value of each specification of table 1
Embodiment 2:
With the copper pipe of external diameter 20mm internal diameter 18mm wall thickness 1mm for outsourcing material, with the aluminum pipe of external diameter 17mm internal diameter 13mm wall thickness 2mm for core, aluminum pipe is inserted in copper pipe composition blank.Obtain the wire rod of each specification after metal drawing drawing, choose sample to wire rod after the drawing of each specification mould, measure each parameter, each parameter measurement is averaged for 10 times, and table 2 is each parameter measurement mean value.
The wire rod parameter measurement mean value of each specification of table 2
Claims (9)
1. hollow type copper-clad aluminum conductor, is characterized in that: its blank uses hollow aluminum pipe.
2. hollow type copper-clad aluminum conductor as claimed in claim 1, is characterized in that: described hollow type copper-clad aluminum conductor is the wire rod having certain internal diameter, outer wrap layers of copper, hollow structure.
3. hollow type copper-clad aluminum conductor as claimed in claim 1, it is characterized in that: specification and use copper strips or the copper pipe match specifications of described aluminum pipe, aluminum pipe label is identical with aluminium bar label, copper pipe or copper strips label constant, its specification and length are depending on production equipment and finished wire rod specification requirement.
4. the production method of hollow type copper-clad aluminum conductor according to claim 1, it is characterized in that: take aluminum pipe as core, the coated layers of copper of outer surface forms blank, and method for coating and technique do not limit, and coated rear formation has the aluminum-copper duplex metal tube billet of certain hollow diameters.
5. the production method of hollow type copper-clad aluminum conductor as claimed in claim 1, it is characterized in that: drawing technique is adopted to aluminum-copper duplex metal tube billet, Hubbing method and technology are not limited, in drawing process, each operation does not limit, every time compression ratio of drawing, specifically depending on material and facility, finally obtains the copper-clad aluminum conductor that inside exists certain cavity.
6. the production method of hollow type copper-clad aluminum conductor as claimed in claim 4, is characterized in that: the method device therefor is conventional equipment; Clad material used is conventional material, or selects by demand; Mould therefor is traditional dies, or designs as requested.
7. the production method of hollow type copper-clad aluminum conductor as claimed in claim 4, is characterized in that: described hollow type copper-clad aluminum conductor wire internal hollow parts diameter parameters is as the criterion depending on finished wire rod specifications and characteristics, not affect premised on properties of product; Hollow space diameter is determined by initial blank copper layer thickness, aluminum pipe caliber and wall thickness and drawing procedure design, and design parameter is by calculating and testing decision.
8. the production method of hollow type copper-clad aluminum conductor as claimed in claim 5, is characterized in that: the method device therefor is conventional equipment; Clad material used is conventional material, or selects by demand; Mould therefor is traditional dies, or designs as requested.
9. the production method of hollow type copper-clad aluminum conductor as claimed in claim 5, is characterized in that: described hollow type copper-clad aluminum conductor wire internal hollow parts diameter parameters is as the criterion depending on finished wire rod specifications and characteristics, not affect premised on properties of product; Hollow space diameter is determined by initial blank copper layer thickness, aluminum pipe caliber and wall thickness and drawing procedure design, and design parameter is by calculating and testing decision.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410653011.XA CN104376897A (en) | 2014-11-17 | 2014-11-17 | Hollow copper-clad aluminum conductor and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410653011.XA CN104376897A (en) | 2014-11-17 | 2014-11-17 | Hollow copper-clad aluminum conductor and production method thereof |
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| CN104376897A true CN104376897A (en) | 2015-02-25 |
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| CN201410653011.XA Pending CN104376897A (en) | 2014-11-17 | 2014-11-17 | Hollow copper-clad aluminum conductor and production method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018051604A (en) * | 2016-09-29 | 2018-04-05 | 矢崎エナジーシステム株式会社 | Manufacturing method of composite conductor wire |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101737565A (en) * | 2008-11-04 | 2010-06-16 | 肖玉佳 | Method for manufacturing copper-aluminum composite tube |
| JP2012000645A (en) * | 2010-06-17 | 2012-01-05 | Fuji Electric Co Ltd | Joining method of aluminum pipe and copper pipe, joining structure and heat exchanger having the joining structure |
| CN102527768A (en) * | 2010-12-08 | 2012-07-04 | 江苏兴荣高新科技股份有限公司 | Manufacturing method of copper-clad aluminum pipe |
| CN203621464U (en) * | 2013-12-30 | 2014-06-04 | 苏州市南方欣达双金属材料有限公司 | Production unit for copper-clad aluminum tubes |
-
2014
- 2014-11-17 CN CN201410653011.XA patent/CN104376897A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101737565A (en) * | 2008-11-04 | 2010-06-16 | 肖玉佳 | Method for manufacturing copper-aluminum composite tube |
| JP2012000645A (en) * | 2010-06-17 | 2012-01-05 | Fuji Electric Co Ltd | Joining method of aluminum pipe and copper pipe, joining structure and heat exchanger having the joining structure |
| CN102527768A (en) * | 2010-12-08 | 2012-07-04 | 江苏兴荣高新科技股份有限公司 | Manufacturing method of copper-clad aluminum pipe |
| CN203621464U (en) * | 2013-12-30 | 2014-06-04 | 苏州市南方欣达双金属材料有限公司 | Production unit for copper-clad aluminum tubes |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018051604A (en) * | 2016-09-29 | 2018-04-05 | 矢崎エナジーシステム株式会社 | Manufacturing method of composite conductor wire |
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Application publication date: 20150225 |