CN217333654U - Aluminum conductive metal bar - Google Patents

Abstract

The utility model discloses an aluminum conductive metal bar, which comprises a first aluminum conductive bar and at least one second aluminum conductive bar connected with the first aluminum conductive bar, wherein the second aluminum conductive bar is an aluminum conductive bar subjected to surface treatment or an aluminum-based composite conductive bar; the first aluminum conducting bar is formed by extrusion of an aluminum profile; the aluminum-based composite conductive bar is an aluminum-coated copper bar, a copper-coated aluminum bar or a copper-aluminum joint bar, the aluminum conductive metal bar can avoid the risk of electrochemical corrosion on the lap joint contact surface of the pure aluminum bar and the copper bar, copper-aluminum bolt lap joint is not needed, and the production and manufacturing cost is low.

Description

Aluminum conductive metal bar

Technical Field

The utility model relates to a power electronic technology field especially relates to an aluminium conductive metal row.

Background

The existing conductive metal row mainly comprises a copper row, and the copper row is mainly characterized by relatively low resistivity and high thermal conductivity, but copper is a precious metal and has high raw material cost. In order to reduce the cost, a plurality of domestic manufacturers develop pure copper conducting bar substitutes such as copper-clad aluminum, copper-clad aluminum and the like, the conducting bars are relatively pure copper conducting bars, the weight and the cost are reduced to a certain extent, but the production process is relatively complex, and the common cost can be sold according to the price of the pure copper bars. Today, the price of copper is increasing, the cost of copper-clad aluminum and copper-clad aluminum is also difficult to maintain, and a conductive bar with lower cost is required.

Therefore, the application of the pure aluminum row is carried out as soon as possible; at present, pure aluminum bars are applied to some low-power electrical equipment. But the application of aluminum bars with high current is still relatively rare. Generally, the electrically conductive connection face of electrically conductive row of aluminium is difficult to avoid can and the copper bar contact, and the copper aluminium faying surface needs the bolt to fasten the connection, and the faying surface is uneven to be difficult to avoid having the steam to get into, takes place electrochemical corrosion very easily between the copper aluminium, in case take place electrochemical corrosion, the aluminium surface will be oxidized and generate non-conductive aluminium oxide, increases contact resistance, and the increase of contact position can lead to generating heat more seriously along with the increase of resistance, probably arouses the trouble even. Therefore, in order to avoid corrosion of the aluminum busbar and increase of contact resistance, the surface of the aluminum busbar is usually subjected to tin plating treatment during use. Generally, the cost of surface treatment of the workpiece is proportional to the weight of the workpiece, but due to process limitations, the cost of bulk and partial tinning of the entire aluminum row is comparable. However, for the aluminum conducting bar, only the metal lap joint surface is necessary to be protected by tin plating through surface treatment, and the use of the non-lap joint surface of the aluminum bar is not affected even if the aluminum oxide is produced through oxidation, namely, most of the aluminum bar positions which play a role in diversion are not necessary to be subjected to surface treatment. Therefore, the high cost of surface treatment of the aluminum bar and the low resistance of the bonding surface of the aluminum bar and the copper conductive bar are difficult to solve.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide an aluminium conductive metal row, this aluminium conductive metal row can avoid pure aluminium to arrange and there is electrochemical corrosion's risk with copper bar overlap joint contact surface, needn't adopt copper aluminium bolt overlap joint, and manufacturing cost is low.

In order to solve the above technical problem, the present invention provides an aluminum conductive metal bar, which includes a first aluminum conductive bar and at least one second aluminum conductive bar connected to the first aluminum conductive bar, wherein the second aluminum conductive bar is a surface-treated aluminum conductive bar or an aluminum-based composite conductive bar; the first aluminum conducting bar is formed by extrusion of an aluminum profile; the aluminum-based composite conductive bar is an aluminum-copper-clad bar, a copper-clad aluminum bar or a copper-aluminum joint bar.

Preferably, the surface-treated aluminum conductive bar may be a tin-plated aluminum bar or a nickel-plated aluminum bar.

Preferably, the cross section of the first aluminum conductive bar is rectangular, square or other shapes with rib structures.

Preferably, the second aluminum conductive bar and the first aluminum conductive bar are connected by welding.

Preferably, the welding may be friction stir welding, argon arc welding, laser welding.

Preferably, the aluminum conductive metal row may be bent or perforated.

After the structure is adopted, the aluminum conductive metal bar comprises a first aluminum conductive bar and at least one second aluminum conductive bar which is connected with the first aluminum conductive bar, wherein the second aluminum conductive bar is an aluminum conductive bar subjected to surface treatment or an aluminum-based composite conductive bar; the first aluminum conducting bar is formed by extrusion of an aluminum profile; the aluminum-based composite conducting bar is an aluminum copper-clad bar, a copper-clad aluminum bar or a copper-aluminum joint bar; the aluminum conductive metal bar can avoid the risk of electrochemical corrosion on the lap joint contact surface of the pure aluminum bar and the copper bar, does not need to adopt copper aluminum bolt lap joint, and has low production and manufacturing cost.

Drawings

FIG. 1 is a structural diagram of an embodiment of an aluminum conductive metal bar of the present invention;

fig. 2 is a first structural diagram of the first aluminum conductive bar and the second aluminum conductive bar of the aluminum conductive metal bar of the present invention connected together by friction stir welding;

fig. 3 is a structural diagram ii of the first aluminum conducting bar and the second aluminum conducting bar of the aluminum conducting metal bar of the present invention connected together by friction stir welding;

fig. 4 is a diagram of a structure of an aluminum conductive metal bar according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example one

Referring to fig. 1, fig. 1 is a structural diagram of an embodiment of an aluminum conductive metal bar according to the present invention; the embodiment discloses an aluminum conductive metal bar, which comprises an aluminum conductive bar I12 and at least one aluminum conductive bar II 11 connected with the aluminum conductive bar I12, wherein the aluminum conductive bar II 11 is an aluminum conductive bar subjected to surface treatment or an aluminum-based composite conductive bar; the first aluminum conducting bar 12 is formed by extrusion of aluminum profiles; the surface of the first aluminum conductor bar 12 is subjected to surface treatment, the aluminum surface covering layer is removed by performing mechanical processing or chemical method on the surface of the first aluminum conductor bar 12 to form a pure aluminum surface, and then the pure aluminum surface is connected with the second aluminum conductor bar 11 by a friction stir welding method, and the connection effect is shown in fig. 2 and 3.

In the friction stir welding adopted by the embodiment, a cylindrical stirring head 13 with a special shaft shoulder and a pin boss is inserted into a workpiece to be welded in a rotating mode in the welding process, friction heat is generated by friction between the stirring head and the material to be welded, the material is thermoplasticized, when the stirring tool moves forwards along an interface to be welded, the thermoplasticized material is transferred from the front part to the rear part of the stirring head, and under the mechanical forging action of the stirring tool, solid-phase connection among workpieces made of different materials such as copper, aluminum and steel can be achieved.

In this embodiment, preferably, the aluminum-based composite conductive bar is an aluminum copper-clad bar, a copper-clad aluminum bar, or a copper-aluminum joint bar.

When the second aluminum conductor bar 11 is an aluminum-based composite conductor bar, the aluminum-based composite conductor bar may be a copper-clad aluminum bar, or a copper-aluminum connector bar, the aluminum component of the aluminum-based composite bar may be pure aluminum, or other aluminum alloys, such as 6063/6061, and the copper of the composite bar is preferably T2 red copper.

In this embodiment, when the second aluminum conductor bar 11 is a surface-treated aluminum conductor bar, the surface-treated aluminum conductor bar may be a tin-plated aluminum bar or a nickel-plated aluminum bar.

The first aluminum conductor bar may be made of 1 series pure aluminum or other series aluminum alloys, and in this embodiment, the first preferred aluminum conductor bar may be made of 6063 or 6061.

In this embodiment, the cross-sectional shape of the first aluminum conductive bar is rectangular, square or other shapes with a rib structure, and the rib not only has the effects of reducing the weight and cost of the material, but also has the effects of increasing the heat dissipation expansion surface of the conductive bar and increasing the current carrying capacity of the aluminum bar.

Example two

The present embodiment is based on the first embodiment, except that the connection method of the first aluminum conductive row 12 and the second aluminum conductive row 11 is argon arc welding.

EXAMPLE III

The present embodiment is based on the first embodiment, except that the connection method of the first aluminum conductor bar 12 and the second aluminum conductor bar 11 is laser welding.

Example four

In this embodiment, on the basis of the first embodiment, the conductive bar to be lapped is disposed in the middle of the first aluminum conductive bar 12, and the processing manner may be as shown in fig. 4.

EXAMPLE five

In this embodiment, on the basis of the first embodiment, the aluminum conductive metal row may be bent or perforated.

The aluminum conductive metal bar can avoid the risk of electrochemical corrosion on the lap joint contact surface of the pure aluminum bar and the copper bar, does not need to adopt copper aluminum bolt lap joint, and has low production and manufacturing cost.

It should be understood that the above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or directly or indirectly applied to other related technical fields are also included in the scope of the present invention.

Claims (6)

1. An aluminum conductive metal bar is characterized by comprising an aluminum conductive bar I and at least one aluminum conductive bar II which is connected with the aluminum conductive bar I, wherein the aluminum conductive bar II is an aluminum conductive bar subjected to surface treatment or an aluminum-based composite conductive bar; the first aluminum conducting bar is formed by extrusion of an aluminum profile; the aluminum-based composite conductive bar is an aluminum-copper-clad bar, a copper-clad aluminum bar or a copper-aluminum joint bar.

2. The aluminum conductive metal bar of claim 1, wherein the surface treated aluminum conductive bar is a tin plated aluminum bar or a nickel plated aluminum bar.

3. The aluminum conducting metal bar as recited in claim 1, wherein the cross section of the first aluminum conducting bar is rectangular, square or in the shape of a structure with fins.

4. The aluminum conducting metal bar as recited in any one of claims 1 to 3, wherein the second aluminum conducting bar is connected with the first aluminum conducting bar by welding.

5. The aluminum conducting metal strip as recited in claim 4, wherein the weld is selected from the group consisting of friction stir welding, argon arc welding, and laser welding.

6. The aluminum conducting metal strip as recited in any one of claims 1 to 3, wherein the aluminum conducting metal strip is bent or perforated.

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