CN101462189A

CN101462189A - Method for welding aluminum glazed wire and copper conductor of electric motor aluminum glazed wire windings

Info

Publication number: CN101462189A
Application number: CNA2007101611869A
Authority: CN
Inventors: 张祥飞; 冯会良
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-12-21
Filing date: 2007-12-21
Publication date: 2009-06-24

Abstract

The invention relates to a method for welding an aluminum enamelled wire of a winding of the aluminum enamelled wire of a motor and a copper conductive wire. The method comprises: depainting the aluminum enamelled wire, then fixing the depainted aluminum enamelled wire onto the copper conductive wire, welding the depainted aluminum enamelled wire and the copper conductive wire by tin, winding the whole depainted aluminum enamelled wire onto the connecting end of the copper conductive wire, and soaking a wound copper enamelled wire and aluminum enamelled wire into a tin liquid. The method has the advantages: 1, improving the prior connecting structure of the aluminum enamelled wire and the copper conductive wire before welding and the temperature resistance level of a paint layer of the aluminum enamelled wire, so as to ensure the whole even welding of the copper conductive wire and the aluminum enamelled wire, prevent the exposed part of the aluminum enamelled wire being oxidated during using, and improve the welding quality of the copper conductive wire and the aluminum enamelled wire greatly; and 2, adding small amount of copper or sliver into soldering tin to improve the conductive performance at the welding part, eliminate or reduce the electric potential difference at copper and aluminum welding part, and ensure the quality.

Description

The aluminium enamel-covered wire of motor aluminium enamel-covered wire winding and the welding method between copper conductor

Technical field

The present invention relates to a kind of method of attachment of motor aluminium enamel-covered wire winding, the method for attachment between particularly a kind of aluminium enamel-covered wire leading-out terminal and copper lead wire.

Background technology

Because raw copper appreciates rapidly, motor also sharp rises with copper enamel-covered wire price, many motor manufacturing enterprise adopts aluminium enamel-covered wire instead of copper enamel-covered wire, but because the connecting line of motor is necessary for copper cash, because the fusion temperature difference between copper and the aluminium is big, be difficult for welding, the difficult problem that is connected between copper conductor and aluminium enamel-covered wire therefore occurred.

At present being connected between copper cash and aluminum steel adopted crimping or riveted joint usually, also has heating tool such as the electric iron of employing to carry out scolding tin and handles.

Adopt crimping and clinching method to handle, can't solve the alumina problem of junction.

Heating tools such as employing electric iron carry out scolding tin to be handled, because the fusing point difference of aluminum bronze, rosin joint or dry joint phenomenon very easily appear in temperature drift or the welding quality that all has a strong impact on the low side; And since aluminium enamel-covered wire with need carry out the depainting processing before copper conductor is connected earlier, the exposed part of the aluminium enamel-covered wire joint that depainting is handled is difficult to all seal, influence welding quality, still there is oxidation hidden danger in the aluminium enamel-covered wire of exposed section, aluminium enamel-covered wire behind the depainting is very easily oxidized, after using certain hour, winding temperature rise in use more can be quickened the oxidation rate at the exposed place of aluminium enamel-covered wire, the electric conductivity of oxidation section position influence lead, make the potential difference of these both sides, position bigger, the arcing of lead junction is blown, shorten its service life.

Summary of the invention

Technical problem to be solved by this invention is to overcome the above-mentioned defective of prior art and a kind of aluminium enamel-covered wire of motor aluminium enamel-covered wire winding and the welding method between copper conductor are provided, and makes more convenient, the better quality of its welding.

The present invention solves the problems of the technologies described above the technical scheme that is adopted:

The aluminium enamel-covered wire of motor aluminium enamel-covered wire winding and the welding method between copper conductor, it comprises the aluminium enamel-covered wire depainting, then the aluminium enamel-covered wire behind the depainting is fixed on the copper conductor, connect with soldering again, it is characterized in that: aluminium enamel-covered wire behind depainting part all is wrapped on the copper conductor link, and the copper after will twining, aluminium enamel-covered wire part are all in the immersion tin liquors.

Above-mentioned aluminium enamel-covered wire preferably has on a small quantity not, and the depainting aluminium enamel-covered wire is wrapped on the copper conductor link.

The above-mentioned length that is wrapped in the winding part on the copper conductor link generally should not surpass 5mm, and the part that surpasses 5mm can be cut, in order to avoid the waste soldering tin material.

The temperature of above-mentioned tin liquor is preferably 270 ℃ ± 30 ℃, and the wicking time is 1-3 second.

Above-mentioned aluminium enamel-covered wire enamelled coating temperature resistant grade is more than the E level, and aluminium enamel-covered wire should adopt the paste paint layer.

Add a kind of or whole of copper or silver in the above-mentioned scolding tin, addition should be used to improve the mechanical performance and the electric conductivity of weld less than 5%, solves the potential difference problem of electric current between the copper aluminium material material, optimizes the quality that copper and aluminium welding connects.

Compared with prior art, the invention has the advantages that:

1, improves the preceding aluminium enamel-covered wire of existing welding and the temperature resistant grade of syndeton between copper conductor and aluminium enamel-covered wire enamelled coating, thereby guarantee the whole evenly welding between copper conductor and aluminium enamel-covered wire, the oxidation of the exposed part of the aluminium enamel-covered wire in preventing to use has improved the welding quality between copper conductor and aluminium enamel-covered wire greatly.

2, add micro-copper or silver in scolding tin, can increase the electric conductivity of weld, elimination or minimizing copper and aluminium welding connect the potential difference at place, ensure the quality of products.

The specific embodiment

Below in conjunction with embodiment the present invention is described in further detail.

The aluminium enamel-covered wire leading-out terminal of motor aluminium enamel-covered wire winding and the welding method between copper conductor, it comprises the aluminium enamel-covered wire depainting, then the aluminium enamel-covered wire behind the depainting is fixed on the copper conductor, connect with soldering again, aluminium enamel-covered wire behind depainting part all is wrapped on the copper conductor link, and the copper after will twining, aluminium enamel-covered wire part are all in the immersion tin liquors.Should note the degree of tightness and the gap of aluminium enamel-covered wire leading-out terminal and copper conductor link during winding.

Aluminium enamel-covered wire behind bare copper wire and the depainting, because the difference of its fusing point is big, unsettled variations in temperature (too high or too low) can have a strong impact on its welding effect during scolding tin, thereby directly influence welding quality and life of product, therefore above-mentioned tin liquor is placed the tin stove, make the variations in temperature of tin liquor minimum, adopt energy to supply with stable thermofussion welding immersed solder method control welding temperature, solved unstability in the welding process and negative effect quality.

Consider the control and the corrode of copper aluminium of copper aluminium enamel-covered wire when welding fusing point simultaneously, adopt and in soldering tin bar, add copper and reduce fusing point a little, and reduce when welding corrode copper conductor.

After copper and aluminium welding connects, owing to motor temperature rise in use produces different thermal coefficient of expansions, and the potential difference between copper aluminium, motor can influence after using certain hour even shorten the welding life-span, silver element is added in employing in soldering tin bar, can improve the mechanical performance of weld, dwindle the potential difference between copper aluminium simultaneously, improve the electric conductivity of weld.

Claims

1, the aluminium enamel-covered wire of motor aluminium enamel-covered wire winding and the welding method between copper conductor, it comprises the aluminium enamel-covered wire depainting, then the aluminium enamel-covered wire behind the depainting is fixed on the copper conductor, connect with soldering again, it is characterized in that: aluminium enamel-covered wire behind depainting part all is wrapped on the copper conductor link, and the copper after will twining, aluminium enamel-covered wire part are all in the immersion tin liquors.

2, the aluminium enamel-covered wire of motor aluminium enamel-covered wire winding according to claim 1 and the welding method between copper conductor is characterized in that: described aluminium enamel-covered wire has on a small quantity not that the depainting aluminium enamel-covered wire is wrapped on the copper conductor link.

3, the aluminium enamel-covered wire of motor aluminium enamel-covered wire winding according to claim 1 and 2 and the welding method between copper conductor is characterized in that: the length that the described aluminium enamel-covered wire that is wrapped on the copper conductor link twines part is no more than 5mm.

4, the aluminium enamel-covered wire of motor aluminium enamel-covered wire winding according to claim 1 and 2 and the welding method between copper conductor is characterized in that: the temperature of described tin liquor is 270 ℃ ± 30 ℃, and the wicking time is 1-3 second.

5, the aluminium enamel-covered wire of motor aluminium enamel-covered wire winding according to claim 1 and 2 and the welding method between copper conductor is characterized in that: described enamelled coating temperature resistant grade is more than the E level.

6, the aluminium enamel-covered wire of motor aluminium enamel-covered wire winding according to claim 4 and the welding method between copper conductor is characterized in that: described enamelled coating temperature resistant grade is more than the E level.

7, the aluminium enamel-covered wire of motor aluminium enamel-covered wire winding according to claim 1 and 2 and the welding method between copper conductor is characterized in that: add a kind of or whole of copper or silver in the described tin liquor, addition should be less than 5%.

8, the aluminium enamel-covered wire of motor aluminium enamel-covered wire winding according to claim 3 and the welding method between copper conductor is characterized in that: add a kind of or whole of copper or silver in the described tin liquor, addition should be less than 5%.

9, the aluminium enamel-covered wire of motor aluminium enamel-covered wire winding according to claim 4 and the welding method between copper conductor is characterized in that: add a kind of or whole of copper or silver in the described tin liquor, addition should be less than 5%.

10, the aluminium enamel-covered wire of motor aluminium enamel-covered wire winding according to claim 5 and the welding method between copper conductor is characterized in that: add a kind of or whole of copper or silver in the described tin liquor, addition should be less than 5%.