Aluminum bar section bar with excellent conductivity

Abstract

The invention discloses an aluminum bar section with excellent conductivity, which comprises an aluminum bar main body and a surface treatment layer, the section shape of the aluminum bar main body is a multi-stage honeycomb structure, the aluminum bar main body comprises a central main chamber and a plurality of peripheral honeycomb chambers, and an arc-shaped reinforcing rib is arranged between the main chamber and each honeycomb chamber; the cross section of the main chamber is hexagonal, and the cross section of each honeycomb chamber is regular hexagonal; the surface treatment layer is a composite coating and comprises a micro-arc oxidation layer on the inner layer and a conductive polymer coating on the outer layer. Therefore, through a multi-stage honeycomb structure formed by the central main chamber and the peripheral honeycomb chambers, the sectional area of the aluminum bar profile is increased, and the conductivity and the mechanical strength are remarkably improved; the bending strength, the non-deformability and the anti-fatigue performance are enhanced through the added arc-shaped reinforcing rib structure; and meanwhile, due to the structure of the composite coating, the corrosion resistance, the wear resistance, the surface hardness and the conductivity of the aluminum bar profile are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum profiles, and particularly to an aluminum bar profile with excellent electrical conductivity. Background Art

[0002] Due to its light weight, corrosion resistance, and good electrical conductivity, aluminum bar profiles are widely used in fields such as power transmission and electrical equipment connection. However, traditional aluminum bar profiles mostly have simple rectangular or circular cross-sections, and there are the following problems: (1) The electrical conductivity is limited by the material purity and cross-sectional shape, making it difficult to meet the high-current transmission requirements; (2) The mechanical strength is relatively low, and it is prone to deformation or fracture under complex working conditions; (3) The heat dissipation performance is insufficient, and the temperature rise is too high after long-term high-load operation, affecting the service life; (4) The fatigue resistance is poor, and cracks are easily generated under dynamic loads.

[0003] Therefore, how to solve the problems of existing rectangular or circular cross-section aluminum bar profiles, where the electrical conductivity is limited by the material purity and cross-sectional shape, making it difficult to meet the high-current transmission requirements, and the mechanical strength is relatively low, and it is prone to deformation or fracture under complex working conditions, has become an important technical problem to be solved by professional technical personnel in this field. Summary of the Invention

[0004] To solve the technical problems in the background art, the present invention proposes an aluminum bar profile with excellent electrical conductivity.

[0005] The aluminum bar profile with excellent electrical conductivity proposed by the present invention includes an aluminum bar main body and a surface treatment layer. The cross-sectional shape of the aluminum bar main body is a multi-stage honeycomb structure, including a central main chamber and multiple peripheral honeycomb chambers. Arc-shaped reinforcing ribs are provided between the main chamber and each honeycomb chamber; the cross-sectional shape of the main chamber is a hexagon, and the cross-sectional shape of each honeycomb chamber is a regular hexagon; the surface treatment layer is a composite coating, including a micro-arc oxidation layer on the inner layer and a conductive polymer coating on the outer layer.

[0006] Preferably, a plurality of staggered heat dissipation grooves are provided on the surface of the aluminum bar main body.

[0007] Preferably, the side length of the honeycomb chamber is set to 5 mm - 10 mm, and the wall thickness is 1 mm - 2 mm.

[0008] Preferably, the thickness of the arc-shaped reinforcing rib is 1.5 mm - 2.5 mm, the width is 4 mm - 6 mm, and the arc radius is 3 mm - 5 mm.

[0009] Preferably, the cross-sectional shape of the heat dissipation groove is set to a rectangle, the depth of the heat dissipation groove is 0.8 mm - 1.8 mm, the width is 2.5 mm - 4.5 mm, and the distance between adjacent grooves is 10 mm - 15 mm.

[0010] Preferably, the thickness of the micro-arc oxidation layer is 20μm - 30μm, and the thickness of the conductive polymer coating is 5μm - 10μm.

[0011] Preferably, the aluminum row body 1 is made of aluminum alloy material, and its components by weight percentage are: aluminum ≥ 99.8%, copper is 0.03% - 0.15%, magnesium is 0.01% - 0.05%, and silicon ≤ 0.03%.

[0012] In summary, the present invention has the following beneficial effects: Through the multi-stage honeycomb structure composed of the central main chamber and the peripheral honeycomb chambers, the cross-sectional area of the aluminum row profile is increased, significantly improving the electrical conductivity and mechanical strength; and the added arc-shaped reinforcing rib structure enhances the bending strength, anti-deformation ability and anti-fatigue performance; at the same time, the structure of the composite coating improves the corrosion resistance, wear resistance, surface hardness and electrical conductivity of the aluminum row profile. Thus, it solves the problems of the existing aluminum row profiles with rectangular or circular cross-sections, whose electrical conductivity is limited by the material purity and cross-sectional shape, making it difficult to meet the high-current transmission requirements, and the mechanical strength is low, and it is prone to deformation or fracture under complex working conditions.

[0013] The additional aspects and advantages of the present invention will be partially given in the following description, partially will become obvious from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0014] Figure 1 It is a cross-sectional view of the aluminum row profile with excellent electrical conductivity according to Embodiment 1 of the present invention;

[0015] Figure 2 is Figure 1 the cross-sectional view at A - A in

[0016] Figure 3 It is a schematic diagram of the partial outer surface of one of the peripheral honeycomb chambers of the aluminum row profile with excellent electrical conductivity according to the embodiment of the present invention.

[0017] In the figure:

[0018] 1. Aluminum row body; 2. Main chamber; 3. Honeycomb chamber; 4. Arc-shaped reinforcing rib; 5. Micro-arc oxidation layer; 6. Conductive polymer coating; 7. Heat dissipation groove. Detailed Description of the Embodiment

[0019] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar symbols represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0020] Such as Figures 1-3As shown, the present embodiment proposes an aluminum bar profile with excellent conductive performance, including an aluminum bar body 1 and a surface treatment layer. The cross-sectional shape of the aluminum bar body 1 is a multi-level honeycomb structure, including a central main chamber 2 and a plurality of peripheral honeycomb chambers 3, and arc-shaped reinforcing ribs 4 are provided between the main chamber 2 and each honeycomb chamber 3; the cross-sectional shape of the main chamber 2 is a hexagon, and the cross-sectional shape of each honeycomb chamber 3 is a regular hexagon; the surface treatment layer is a composite coating, including an inner micro-arc oxidation layer 5 and an outer conductive polymer coating 6.

[0021] Specifically, the side length of the honeycomb chamber 3 is set to 5mm-10mm, such as 5mm, 8mm or 10mm, etc., and the wall thickness is 1mm-2mm; such as 1mm, 1.5mm or 2mm, etc.; the thickness of the arc reinforcing rib 4 is 1.5mm-2.5mm, such as 1.5mm, 2mm or 2.5mm, etc.; the width is 4mm-6mm, such as 4mm, 5mm or 6mm, etc., and the arc radius is 3mm-5mm, such as 3mm, 4mm or 5mm, etc. The specific values ​​are determined according to the actual use occasion.

[0022] The thickness of the micro-arc oxidation layer 5 is 20 μm-30 μm, and the thickness of the conductive polymer coating 6 is 5 μm-10 μm, thereby improving the corrosion resistance, wear resistance, surface hardness and conductivity of the aluminum bar profile.

[0023] In this way, the cross-sectional area of ​​the aluminum bar profile is increased through the multi-level honeycomb structure composed of the central main chamber 2 and the peripheral honeycomb chamber 3, and the electrical conductivity and mechanical strength are significantly improved; and the added arc-shaped reinforcement rib 4 structure enhances the bending strength, deformation resistance and fatigue resistance; at the same time, the structure of the composite coating improves the corrosion resistance, wear resistance, surface hardness and electrical conductivity of the aluminum bar profile, and extends its service life; it meets the requirements of high current transmission and use under complex working conditions.

[0024] Furthermore, the surface of the aluminum bar body 1 is provided with a plurality of staggered heat dissipation grooves 7, which enhances the heat dissipation performance and is suitable for high temperature working conditions.

[0025] Furthermore, the cross-sectional shape of the heat dissipation groove 7 is set to be rectangular, the depth of the heat dissipation groove 7 is 0.8mm-1.8mm, the width is 2.5mm-4.5mm, for example, it can be 2.5mm or 3.5mm or 4.5mm, etc.; the spacing between adjacent grooves is 10mm-15mm, for example, it can be 10mm or 13mm or 15mm, etc. The specific values ​​are determined according to the actual use occasion.

[0026] In this embodiment, the aluminum row body 1 is made of high-purity aluminum alloy material, and its composition by weight percentage is: aluminum (Al) ≥ 99.8%, copper (Cu) 0.03% - 0.15%, magnesium (Mg) 0.01% - 0.05%, silicon (Si) ≤ 0.03%, and the rest are inevitable impurities. This composition improves the mechanical strength, heat resistance and fatigue resistance of the aluminum row while ensuring high electrical conductivity.

[0027] Furthermore, the preparation method of the aluminum row profile in the above embodiment includes the following steps:

[0028] S1, Material preparation: Use high-purity aluminum alloy material, and its composition by weight percentage is: aluminum (Al) ≥ 99.8%, copper (Cu) 0.03% - 0.15%, magnesium (Mg) 0.01% - 0.05%, silicon (Si) ≤ 0.03%, and the rest are inevitable impurities; melt and cast the aluminum alloy material to make a blank.

[0029] S2, Extrusion molding: Heat the blank to 450°C - 500°C and form it into an aluminum row profile with a multi-stage honeycomb structure through an extrusion die.

[0030] S3, Surface processing: Process staggered heat dissipation grooves on the surface of the aluminum row profile, with the groove depth being 0.8 mm - 1.8 mm, the width being 2.5 mm - 4.5 mm, and the distance between adjacent grooves being 10 mm - 15 mm.

[0031] S4, Surface treatment: Perform micro-arc oxidation treatment on the aluminum row profile to form a micro-arc oxidation layer with a thickness of 20 μm - 30 μm; coat a conductive polymer coating on the surface of the micro-arc oxidation layer, with a thickness of 5 μm - 10 μm.

[0032] Example 1:

[0033] Aluminum row profile structure

[0034] Cross-sectional shape: Multi-stage honeycomb structure, including a central main chamber 2 and six peripheral honeycomb chambers 3.

[0035] Central main chamber 2: The cross-sectional shape is a regular hexagon, with a side length of 10 mm and a wall thickness of 2 mm.

[0036] Peripheral honeycomb chamber 3: The cross-sectional shape is a regular hexagon, with a side length of 5 mm and a wall thickness of 1.5 mm.

[0037] Arc-shaped reinforcing rib 4: Connect the main chamber 2 and the honeycomb chamber 3, with a thickness of 2 mm, a width of 5 mm, and an arc radius of 4 mm.

[0038] Heat dissipation groove 7: There are staggered heat dissipation grooves 7 on the surface, with the groove depth being 1 mm, the width being 3 mm, and the distance between adjacent grooves being 12 mm.

[0039] Material composition: Aluminum (Al): 99.8%, Copper (Cu): 0.1%, Magnesium (Mg): 0.05%, Silicon (Si): 0.02%, Other impurities: ≤0.03%.

[0040] Surface treatment: Micro-arc oxidation layer 5: Thickness is 25μm; Conductive polymer coating 6: Thickness is 8μm.

[0041] Performance test

[0042] Electrical conductivity: The conductivity reaches 62% IACS (International Annealed Copper Standard).

[0043] Mechanical strength: Tensile strength is 220MPa, Yield strength is 180MPa.

[0044] Heat dissipation performance: At a current of 100A, the temperature rise is 15% lower than that of traditional aluminum busbar profiles.

[0045] Corrosion resistance: Passed the salt spray test, and the corrosion resistance time exceeded 1000 hours.

[0046] Example 2:

[0047] Aluminum busbar profile structure

[0048] Cross-sectional shape: Multi-stage honeycomb structure, including a central main chamber 2 and eight peripheral honeycomb chambers 3.

[0049] Central main chamber 2: The cross-sectional shape is a regular hexagon, the side length is 12mm, and the wall thickness is 2.5mm.

[0050] Peripheral honeycomb chamber 3: The cross-sectional shape is a regular hexagon, the side length is 6mm, and the wall thickness is 2mm.

[0051] Arc-shaped reinforcing rib 4: Connects the main chamber 2 and the honeycomb chamber 3, the thickness is 2.5mm, the width is 6mm, and the arc radius is 5mm.

[0052] Heat dissipation groove 7: The surface is provided with staggered heat dissipation grooves 7, the groove depth is 1.5mm, the width is 4mm, and the distance between adjacent grooves is 15mm.

[0053] Material composition: Aluminum (Al): 99.85%, Copper (Cu): 0.08%, Magnesium (Mg): 0.03%, Silicon (Si): 0.01%, Other impurities: ≤0.03%.

[0054] Surface treatment: Micro-arc oxidation layer 5: Thickness is 30μm; Conductive polymer coating 6: Thickness is 10μm.

[0055] Performance test

[0056] Electrical conductivity: The conductivity reaches 63% IACS.

[0057] Mechanical strength: The tensile strength is 240 MPa and the yield strength is 200 MPa.

[0058] Heat dissipation performance: At a current of 150 A, the temperature rise is 18% lower than that of traditional aluminum busbar profiles.

[0059] Corrosion resistance: Passed the salt spray test, and the corrosion resistance time exceeded 1200 hours.

[0060] Example 3:

[0061] Aluminum busbar profile structure

[0062] Cross-sectional shape: Multistage honeycomb structure, including a central main chamber 2 and twelve peripheral honeycomb chambers 3.

[0063] Central main chamber 2: The cross-sectional shape is a regular hexagon, with a side length of 15 mm and a wall thickness of 3 mm.

[0064] Peripheral honeycomb chamber 3: The cross-sectional shape is a regular hexagon, with a side length of 8 mm and a wall thickness of 2.5 mm.

[0065] Arc-shaped reinforcing rib 4: Connects the main chamber 2 and the honeycomb chamber 3, with a thickness of 3 mm, a width of 7 mm, and an arc radius of 6 mm.

[0066] Heat dissipation groove 7: The surface is provided with heat dissipation grooves 7 distributed in a staggered manner, with a groove depth of 1.8 mm, a width of 4.5 mm, and an adjacent groove spacing of 18 mm.

[0067] Material composition: Aluminum (Al): 99.9%, Copper (Cu): 0.05%, Magnesium (Mg): 0.02%, Silicon (Si): 0.01%, Other impurities: ≤0.02%.

[0068] Surface treatment: Micro-arc oxidation layer 5: Thickness is 35 μm; Conductive polymer coating 6: Thickness is 12 μm.

[0069] Performance test

[0070] Electrical conductivity: The conductivity reaches 64% IACS.

[0071] Mechanical strength: The tensile strength is 260 MPa and the yield strength is 220 MPa.

[0072] Heat dissipation performance: At a current of 200 A, the temperature rise is 20% lower than that of traditional aluminum busbar profiles.

[0073] Corrosion resistance: Passed the salt spray test, and the corrosion resistance time exceeded 1500 hours.

[0074] As can be seen from the above embodiments, an aluminum bar profile with excellent electrical conductivity in the embodiments of the present invention exhibits excellent electrical conductivity, mechanical strength, heat dissipation performance, and corrosion resistance under different structural designs and material optimizations. Embodiment 1 is suitable for the connection of general electrical equipment, Embodiment 2 is suitable for high-current transmission scenarios, and Embodiment 3 is suitable for extremely high currents and complex working conditions. In summary, through the structural design of a multi-level honeycomb structure, arc-shaped reinforcing ribs, and a composite coating, the comprehensive performance of the aluminum bar profile is significantly improved, and it has broad application prospects.

[0075] It should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0076] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0077] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0078] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An aluminum bar profile with excellent electrical conductivity, characterized in that: It comprises an aluminum bar body and a surface treatment layer. The cross-sectional shape of the aluminum bar body is a multi-level honeycomb structure, comprising a central main chamber and a plurality of peripheral honeycomb chambers. Arc-shaped reinforcing ribs are provided between the main chamber and each of the honeycomb chambers. The cross-sectional shape of the main chamber is a hexagon, and the cross-sectional shape of each of the honeycomb chambers is a regular hexagon. The surface treatment layer is a composite coating, comprising an inner micro-arc oxidation layer and an outer conductive polymer coating.

2. The aluminum bar profile with excellent electrical conductivity according to claim 1, characterized in that: The surface of the aluminum bar body is provided with a plurality of heat dissipation grooves which are staggeredly distributed.

3. The aluminum bar profile with excellent electrical conductivity according to claim 1, characterized in that: The side length of the honeycomb chamber is set to 5mm-10mm, and the wall thickness is 1mm-2mm.

4. The aluminum bar profile with excellent electrical conductivity according to claim 1, characterized in that: The arc-shaped reinforcing rib has a thickness of 1.5 mm to 2.5 mm, a width of 4 mm to 6 mm, and an arc radius of 3 mm to 5 mm.

5. The aluminum bar profile with excellent electrical conductivity according to claim 2, characterized in that: The cross-sectional shape of the heat dissipation groove is set to be rectangular, the depth of the heat dissipation groove is 0.8mm-1.8mm, the width is 2.5mm-4.5mm, and the distance between adjacent grooves is 10mm-15mm.

6. The aluminum bar profile with excellent electrical conductivity according to claim 1, characterized in that: The thickness of the micro-arc oxidation layer is 20 μm-30 μm, and the thickness of the conductive polymer coating is 5 μm-10 μm.

7. The aluminum bar profile with excellent electrical conductivity according to claim 1, characterized in that: The aluminum bar body 1 is made of an aluminum alloy material, and the components thereof are as follows by weight percentage: aluminum ≥ 99.8%, copper 0.03%-0.15%, magnesium 0.01%-0.05%, and silicon ≤ 0.03%.

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