CN102361203A - Method for lapping copper cladding aluminum flat wires through tin soldering - Google Patents
Method for lapping copper cladding aluminum flat wires through tin soldering Download PDFInfo
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- CN102361203A CN102361203A CN2011103563052A CN201110356305A CN102361203A CN 102361203 A CN102361203 A CN 102361203A CN 2011103563052 A CN2011103563052 A CN 2011103563052A CN 201110356305 A CN201110356305 A CN 201110356305A CN 102361203 A CN102361203 A CN 102361203A
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- lapping
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- copper cladding
- cladding aluminum
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Abstract
The invention relates to a method for lapping copper cladding aluminum flat wires through tin soldering. The method comprises the following steps of: a, polishing a lapping surface until the lapping surface is flat, wherein the length of a lapping area is 15 to 30 times the thickness of a lapping parent material; b, lapping by taking tin as solder during butt joint, wherein the thickness of a weld is between 0.3 and 1.0mm; c, compacting two butt joint ends, wherein the heating temperature is not more than 400 DEG C; and d, polishing the joint after welding. By the method for lapping the copper cladding aluminum flat wires through tin soldering, any tooling fixture is not required to be replaced when copper cladding aluminum wires of different specifications are alternately welded; and the method is easy to operate and is favorable for improving production efficiency and required time is short. The melting point of pure tin is 231 DEG C, so the heating temperature can be controlled to be about 300 DEG C in the welding process, and influence on the copper and aluminum combination of copper cladding aluminum is avoided.
Description
Technical field
The present invention relates to a kind of copper clad aluminum flat wire plumb joint method.
Background technology
As everyone knows, copper has unique physical property and electric property, is traditional electric conducting material, also is the main raw material(s) of transformer winding.But,, impel electrician trade actively to seek substitute material because scarcity and the market price of copper resource remain high in the world.It is generally acknowledged that aluminum conductor is a substitute material preferably.Because the aboundresources of aluminium, it has cheap, in light weight, conductance than advantages such as height, so, " with aluminium for copper " was just proposed in the sixties in 20th century, make the electric energy transmitting line with aluminum conductor, comprising making Transformer Winding.But because the intensity of aluminium is lower, creep easily, winding is long-term can to produce distortion after using, and the corrosivity of aluminium is relatively poor, and the surface very easily forms firm oxide-film, causes joint to be difficult to firm connection, thereby has limited the further popularization of " with aluminium for copper ".Development along with the double metallic composite material technology; People utilize the good electric conductivity of copper and the lightweight characteristics of aluminium; The copper layer is coated on around the aluminium core; Formation has that good conductivity, density are little, soft, corrosion resistance, cheap copper-clad aluminum conductor, thereby develops into the third metal material of lead.The main method that is applied to the copper-clad aluminum conductor welding now is cold welding.The main technologic parameters of welding is confirmed by die size, the corresponding a kind of pressure welding mould of the lead of every kind of specification.Overlap joint is during cold welding, with workpiece take put well after, neutralize the head pressurization with steel, pressure head is pressed into after the necessary degree of depth repeatedly several times, welding is accomplished.Through the cold welding joint of when welding gross distortion, its combination interface all presents complicated peak valley and indenting space pattern, and to leak aluminium be unavoidable at the contact place simultaneously, so need artificial polishing to make joint surface smooth and electroplate leaking the aluminium place after the welding.This method is unfavorable for that the characteristic that transformer twines is following: 1. very fast the and workshop of the speed of wrap of transformer possibly twined by the plurality of specifications lead simultaneously, and the lead of a kind of specification of every overlap joint will be changed mould one time, and operation is trouble, time-consuming comparatively; 2. the joint presents complicated peak valley and indenting space pattern, and polishing is relatively wasted time and energy; 3. aluminium must be leaked in the joint, and electroplating then increases one procedure; Other thermal weld mode is such as the welding of neither suitable copper-clad aluminum conductors such as gas welding, and its reason is following: 1. the fusing point of fine aluminium is 660 ℃, if the temperature too high aluminium that will cause in joint melts.2. the rising copper aluminium interface along with temperature can produce the copper aluminium compound, and temperature surpasses the combination degree of 400 ℃ of heavy damage copper aluminium.
Summary of the invention
The technical problem that the present invention will solve is to the problem of copper clad aluminum flat wire length limitation in transformer application, and a kind of timesaving swift to operate plumb joint method is provided.
In order to solve the problem that prior art exists, the technical scheme that the present invention adopts is:
Copper clad aluminum flat wire plumb joint method comprises the steps:
A. faying surface is polished flat, the overlap length of field is 15 ~ 30 times of overlap joint mother metal thickness;
When b. docking be the scolder overlap joint with tin, throat depth is between 0.3 ~ 1.0mm;
C. will dock two and compress, heating-up temperature is no more than 400 ℃;
D. postwelding polishing joint.
Heating-up temperature is 300 ℃ among the described step c.
Advantage and effect that the present invention had are:
Copper clad aluminum flat wire plumb joint method of the present invention need be with changing any frock clamp when the different size copper-clad aluminum conductor alternately welds, and simple and efficient to handle, required time is short, helps enhancing productivity.The fusing point of pure tin is at 231 ℃, so heating and temperature control gets final product about 300 ℃ in welding process, can not combine the copper aluminium of copper cover aluminum to have any impact.
Table 1 is tensile strength and the tensile strength of elongation and mother metal and the experimental data of elongation of normal temperature plumb joint method weld seam of the present invention down and during 75～85 ℃ of ambient temperatures.
Can find out that according to table 1 tensile strength of weld seam under the normal temperature is not less than the tensile strength of mother metal; Weld seam tensile strength is not less than 90% of mother metal during 75～85 ℃ of ambient temperatures.
Description of drawings
View when Fig. 1 welds for docking in the copper clad aluminum flat wire plumb joint method of the present invention.
Fig. 2 is the cutaway view of Fig. 1.
Among the figure: copper cash joint 1; Aluminum steel joint 2; Tin solder 3.
Embodiment
A kind of copper clad aluminum flat wire plumb joint of the present invention method, its step is following:
A. before the butt joint, as shown in Figure 1, earlier remove oxide-film with the polish interface of two line body copper cash joints 1 and aluminum steel joint 2 of file, make shinny, the smooth no burr in its surface.The overlap length of field is 15 ~ 30 times of overlap joint mother metal thickness.
As shown in Figure 2 when b. docking, earlier with placing enough tin solders 3 in the middle of copper cash joint 1 and the aluminum steel joint 2, butt joint welding rapidly again.Throat depth is controlled between 0.3 ~ 1.0mm.
C. copper cash joint 1 must keep straight with aluminum steel joint 2 in the docking operation; It is fast that butt joint speed is wanted, and butt joint two will compress, be heated evenly, must guard against uneven in temperature; Heating-up temperature is no more than 400 ℃, in the present embodiment in the welding process heating and temperature control about 300 ℃, get final product.
D. postwelding receives thermal oxidation place to use sand papering with the careful polishing joint of file during welding, and surface, butt joint back should smooth no burr.
Claims (2)
1. copper clad aluminum flat wire plumb joint method is characterized in that: comprise the steps:
A. faying surface is polished flat, the overlap length of field is 15 ~ 30 times of overlap joint mother metal thickness;
When b. docking be the scolder overlap joint with tin, throat depth is between 0.3 ~ 1.0mm;
C. will dock two and compress, heating-up temperature is no more than 400 ℃;
D. postwelding polishing joint.
2. copper clad aluminum flat wire plumb joint method according to claim 1 is characterized in that: heating-up temperature is 300 ℃ among the described step c.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103563052A CN102361203A (en) | 2011-11-11 | 2011-11-11 | Method for lapping copper cladding aluminum flat wires through tin soldering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103563052A CN102361203A (en) | 2011-11-11 | 2011-11-11 | Method for lapping copper cladding aluminum flat wires through tin soldering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102361203A true CN102361203A (en) | 2012-02-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103563052A Pending CN102361203A (en) | 2011-11-11 | 2011-11-11 | Method for lapping copper cladding aluminum flat wires through tin soldering |
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| CN (1) | CN102361203A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106862691A (en) * | 2017-03-08 | 2017-06-20 | 贵州电网有限责任公司电力科学研究院 | A kind of copper-aluminium transition connection terminal soldering method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2988559B2 (en) * | 1993-03-10 | 1999-12-13 | 日本工機株式会社 | Electric wire welding method and apparatus |
| CN101143396A (en) * | 2006-09-27 | 2008-03-19 | 许晓华 | Aluminium wire covered with copper enamel-covered wire and copper wire welding method |
| CN101710503A (en) * | 2009-12-04 | 2010-05-19 | 傅氏国际（大连）双金属线缆有限公司 | Copper-clad aluminium wire production method |
| CN102229027A (en) * | 2011-06-20 | 2011-11-02 | 珠海精易焊接设备有限公司 | Welding knife for directly welding copper clad aluminum enameled wire |
-
2011
- 2011-11-11 CN CN2011103563052A patent/CN102361203A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2988559B2 (en) * | 1993-03-10 | 1999-12-13 | 日本工機株式会社 | Electric wire welding method and apparatus |
| CN101143396A (en) * | 2006-09-27 | 2008-03-19 | 许晓华 | Aluminium wire covered with copper enamel-covered wire and copper wire welding method |
| CN101710503A (en) * | 2009-12-04 | 2010-05-19 | 傅氏国际（大连）双金属线缆有限公司 | Copper-clad aluminium wire production method |
| CN102229027A (en) * | 2011-06-20 | 2011-11-02 | 珠海精易焊接设备有限公司 | Welding knife for directly welding copper clad aluminum enameled wire |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106862691A (en) * | 2017-03-08 | 2017-06-20 | 贵州电网有限责任公司电力科学研究院 | A kind of copper-aluminium transition connection terminal soldering method |
| CN106862691B (en) * | 2017-03-08 | 2019-02-15 | 贵州电网有限责任公司电力科学研究院 | A kind of copper-aluminium transition connection terminal soldering method |
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Application publication date: 20120222 |