CN217426573U - Copper support piece and electrical component - Google Patents
Copper support piece and electrical component Download PDFInfo
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- CN217426573U CN217426573U CN202221413617.2U CN202221413617U CN217426573U CN 217426573 U CN217426573 U CN 217426573U CN 202221413617 U CN202221413617 U CN 202221413617U CN 217426573 U CN217426573 U CN 217426573U
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Abstract
The utility model provides a copper support piece and electrical component, copper support piece includes first, second metal level and intermediate metal level, the material of first, second metal level is pure copper, copper alloy or compound copper product, the material of intermediate metal level is iron or low carbon steel, the three-layer complex is as an organic whole and constitutes stratiform composite material area, the thickness of first metal level is greater than the thickness of second metal level, and the side of the cladding stratiform composite material area of first metal level, make intermediate metal level not expose in the air; the first metal layer is used as a welding surface, the middle metal layer is used as a non-welding surface, and the welding surface is provided with a through hole penetrating through the thickness direction of the layered composite material belt. The utility model discloses effectively solve the electric component and rust card mechanism, the easy perk of arc ignition angle, the welding climbs the point and arranges the bad problem of sediment exhaust to reduce the temperature rise of electrical products and improve electrical products's electric life, shortened welding process, improved the quality of electric component by a wide margin, reduced the quantity of high price copper, be fit for mass production.
Description
Technical Field
The utility model relates to an electrical device field specifically, relates to a copper support piece and electrical component.
Background
When the electric contact assembly and the supporting piece of the low-voltage electric appliance such as the circuit breaker, the relay, the contactor, the control switch and the like work, the electric contact assembly and the supporting piece play a role in transmitting current to form a loop, and the quality of the electric contact assembly directly influences the reliability and the stability of the electric appliance such as the circuit breaker, the relay and the like.
The material of the electric contact support part is mostly copper-clad steel. The copper-clad steel has high strength and high plasticity, the electrical conductivity is good, but the magnetic element Fe in the middle layer is exposed in the air, so that rusting is easy to occur, the rust block is easy to fall off and is adsorbed inside an iron core of an electrical appliance, the attraction of the iron core is influenced, an internal mechanism is blocked and fails, the rust block is also easily adsorbed on an electrical contact, the trend of an electric arc is influenced, and the electrical service life of the electrical appliance product is influenced.
Through retrieval, few researches or reports on contact support materials for low-voltage electric appliances and preparation methods thereof are carried out at home and abroad. For example: chinese patent publication No. CN105161380A discloses a circuit breaker electrical contact support and a method for making the same, in which Cu/Fe/Cu composite material tape is inlaid with a copper block to replace the conventional product, but the magnetic element Fe contained in the support material is exposed in the air, which brings risks of affecting the arc trend and the service life of the electrical appliance.
Therefore, there is a need to develop a copper support and an electrical assembly to improve the reliability and lifespan of electrical devices such as circuit breakers.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model aims at providing a copper support piece and electrical component.
The utility model discloses a first aspect provides a copper support piece, include:
the material of the first metal layer is pure copper, copper alloy or composite copper material;
the second metal layer is made of pure copper, copper alloy or composite copper material and is the same as or different from the first metal layer;
the middle metal layer is made of iron or low-carbon steel; the middle metal layer is arranged between the first metal layer and the second metal layer, and the first metal layer, the middle metal layer and the second metal layer are compounded into a whole to form a layered composite material belt;
the thickness of the first metal layer is larger than that of the second metal layer, the side edge of the layered composite material belt is coated by the first metal layer, the middle metal layer is not exposed in the air, the first metal layer serves as a welding surface, and the second metal layer and the middle metal layer serve as non-welding surfaces.
Preferably, the thickness of the first metal layer and the second metal layer is 5% -80% of the thickness of the whole laminated composite material belt.
Preferably, the welding surface is provided with a through hole penetrating through the thickness direction of the layered composite material strip and used for exhausting and deslagging in a welding center area.
Preferably, the non-welding surface is provided with a diversion trench, and the diversion trench is communicated with the through hole and is used for guiding the redundant solder at the welding surface to two ends of the copper support piece.
Preferably, the shape of the diversion trench is rectangular or cross-shaped.
Preferably, the shape of the through hole is any one of a circle, a rectangle, a polygon, an ellipse, a triangle and a horseshoe.
Preferably, two ends of the layered composite material strip are bent towards the non-welding surface to form an arc striking angle.
The utility model discloses a second aspect provides an electrical component, include: the copper support and the electric contact are welded on the welding surface of the copper support.
Compared with the prior art, the utility model discloses at least one kind's beneficial effect as follows has:
the utility model has the advantages that the copper support piece wraps the middle metal layer containing Fe element between the two copper layers, so that the side edge of the copper support piece is wrapped by the Cu layer, the Fe of the middle metal layer is not exposed in the air, and the problem that the conventional Cu/Fe/Cu copper piece is easy to rust is solved, thereby prolonging the service life of the electric appliance product and solving the problem that the mechanism is stuck due to rust of the electric appliance; meanwhile, the copper layers with different thicknesses are arranged, the layer with the thick copper layer serves as a welding surface, the layer with the thin copper layer serves as a non-welding surface, so that the conductivity of the copper supporting piece is improved by 30% compared with that of a conventional product, the problem of conductivity of the copper supporting piece is effectively solved, and the temperature rise of an electric appliance product is reduced.
The copper support piece of the utility model is provided with the diversion trench on the non-welding surface and the welding surface by punching the welding surface, so that redundant welding flux enters the diversion trench along the small hole in the welding process, and one-step welding of a plurality of parts such as an electric contact, a copper piece and an arc striking angle is realized; meanwhile, the welding surface is punched, so that the effects of welding, exhausting and deslagging are achieved, the inconsistent situation of melting of the center and the edge of the contact solder with larger specification is effectively improved, insufficient welding or over-welding is prevented, the problem of excessive solder welding climbing is effectively solved, the welding process is greatly shortened, and the quality and the production cost of the electric appliance assembly are improved.
The utility model discloses above-mentioned electrical component has advantages such as electric excellent performance, mechanical properties are good, be difficult for rustting.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic structural view of a copper support member according to a preferred embodiment of the present invention;
fig. 2 is a schematic structural view of an electrical component according to an embodiment 1 of the present invention;
fig. 3 is a schematic partial structure diagram of an electrical component according to embodiment 1 of the present invention;
fig. 4 is a schematic structural view of an electrical component according to embodiment 2 of the present invention;
fig. 5 is a partial schematic structural view of an electrical component according to embodiment 2 of the present invention;
fig. 6 is a schematic structural view of an electrical component according to embodiment 1 of the present invention;
the scores in the figure are expressed as: 1 is an electrical contact, 2 is a copper support, 3 is a through hole, 4 is a guiding groove, 5 is an arc striking angle, 201 is a first metal layer, 202 is an intermediate metal layer, and 203 is a second metal layer.
Detailed Description
The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that numerous variations and modifications could be made by those skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.
Referring to fig. 1, a schematic structural diagram of a copper supporting member according to a preferred embodiment of the present invention is shown, which includes: a first metal layer, an intermediate metal layer, and a second metal layer; the first metal layer is made of pure copper, copper alloy or composite copper material; the second metal layer is made of pure copper, copper alloy or composite copper material, and is the same as or different from the first metal layer; the intermediate metal layer is made of iron or low-carbon steel. In particular embodiments, the copper alloy may be a low resistivity copper alloy such as oxygen free copper, brass, iron bronze, copper nickel alloy, and the like. The composite copper material can be a layered composite copper material or a particle reinforced composite copper material. The middle metal layer is arranged between the first metal layer and the second metal layer, and the first metal layer, the middle metal layer and the second metal layer are compounded into a whole to form the layered composite material belt, namely, the lower surface of the middle metal layer is connected with the upper surface of the first metal layer, and the upper surface of the middle metal layer is connected with the lower surface of the second metal layer; the thickness of the first metal layer is larger than that of the second metal layer, the middle metal layer exposed at the side edge of the layered composite material belt is wrapped inside by the first metal layer, so that the middle metal layer is not exposed in the air, and the problem that a conventional Cu/Fe/Cu copper piece is easy to rust is solved, so that the service life of an electric appliance product is prolonged, and the problem that a mechanism of an electric appliance is blocked due to rusting is solved.
The first metal layer is used as a welding surface, and the second metal layer is used as a non-welding surface. The copper support member formed by the structure has the advantages that the copper layer on the welding surface is thick, and the copper layer on the non-welding surface is thin, so that the conductivity of the copper support member is improved by 30% compared with that of a conventional product, the problem of conductivity of the copper support member is effectively solved, and the temperature rise of an electric appliance product is reduced.
In some preferred embodiments, the thickness of the first metal layer and the second metal layer is 5% to 80% of the thickness of the entire laminated composite tape.
In order to improve the subsequent welding quality, in some preferred embodiments, the welding surface is provided with a through hole penetrating through the thickness direction of the laminated composite material strip, and the through hole is used for exhausting and deslagging in the welding central area. Specifically, the shape of the through hole can adopt but is not limited to adopt the following shapes: any one of circular, rectangular, polygonal, elliptical, triangular and horseshoe shapes, and other shapes which can satisfy the slag discharge and exhaust functions of the welding center region can also be adopted.
Further, in some preferred embodiments, in order to drain the solder during the soldering, a diversion trench may be provided on the non-soldering surface, and the diversion trench communicates with the through hole for draining the excess solder at the soldering surface to both ends of the copper support. In a preferred embodiment, the shape of the flow guide groove is not limited to a rectangular shape or a cross shape, and other shapes that satisfy the solder flow function may be used.
In other preferred embodiments, two ends of the laminated composite material strip are bent towards the non-welding surface to form an arc striking angle so as to guide the electric arc to be far away from the working surface of the movable silver point and the static silver point and to be scattered outwards.
In a specific embodiment, the copper support may be prepared by a method comprising:
s100, sequentially stacking a first metal layer, an intermediate metal layer and a second metal layer, wherein the thickness of the first metal layer is larger than that of the second metal layer, then asymmetrically compounding the first metal layer, the intermediate metal layer and the second metal layer to obtain a layered composite material belt, and then carrying out heat treatment on the obtained layered composite material belt. The asymmetric compounding in the step refers to: and rolling and compounding the first metal layer, the middle metal layer and the second metal layer into a whole. The metal layers on the two sides of the middle metal layer have different thicknesses, and the cross-sectional structure of the layered composite material belt is asymmetric.
S200, punching the layered composite material belt after heat treatment: and punching from the first metal layer with large thickness to the second metal layer with small thickness to enable the first metal layer to wrap the two side edges of the layered composite material belt, so that the middle metal layer positioned in the middle is not exposed in the air, and the copper support piece is obtained.
In the above method for manufacturing a copper supporting member, after the punching of the heat-treated laminated composite material tape, the method may further include: and punching the first metal layer, and forming a through hole penetrating through the first metal layer in the thickness direction of the layered composite material belt for exhausting and deslagging in the welding center area. Furthermore, a concave diversion trench can be processed on the outer surface of the second metal layer close to the through hole and used for diverting the redundant solder at the welding surface to two ends of the copper support piece.
In the preparation method of the copper support piece, the obtained layered composite material belt is subjected to heat treatment, wherein the temperature is 300-800 ℃, the time is 2-6 hours, and the atmosphere is H 2 、N 2 Or an ammonia decomposition atmosphere.
Based on the structural characteristics of the copper support piece of the above embodiment, in another embodiment of the present invention, an electrical assembly is provided, which includes the above copper support piece and an electrical contact, and the electrical contact is welded on the welding surface of the copper support piece.
The following description further illustrates the structural features of the copper supporting member by taking three electrical components respectively including the copper supporting member according to the above embodiments as an example, and it should be noted that the following embodiments are not intended to limit the present invention.
Example 1
Referring to fig. 2 and 3, the structure of the electrical assembly is schematically illustrated, and the diagram includes: the device comprises an electric contact 1 and a copper support, wherein the electric contact 1 is made of AgSnO2 material; as shown in fig. 1, the copper supporting member includes a first metal layer, an intermediate metal layer, and a second metal layer, in this embodiment, the first metal layer and the second metal layer both use pure copper, and the intermediate metal layer is pure iron, that is, the copper supporting member uses a Cu/Fe/Cu layered composite material tape.
The preparation method of the electrical component comprises the following steps:
s1: the method comprises the following steps of sequentially stacking a pure Cu strip, a pure Fe strip and a pure Cu strip, and carrying out asymmetric cold rolling compounding to obtain a Cu/Fe/Cu material strip, wherein in the Cu/Fe/Cu material strip, an intermediate layer is a middle metal layer, the thickness of one outer Cu layer is 80% of the whole material strip, and the thickness of the other outer Cu layer is 10% of the whole material strip; the cross-sectional structure of the Cu/Fe/Cu material belt is asymmetrical. And then carrying out heat treatment on the obtained Cu/Fe/Cu material belt. The adopted heat treatment process parameters are as follows: the temperature was 800 ℃ and the time 2 hours, the atmosphere being H2.
S2: and punching the Cu/Fe/Cu material belt obtained in the step S1 from the Cu layer with large thickness to the Cu layer with small thickness, so that the Cu layer with large thickness wraps two side edges of the Cu/Fe/Cu material belt. And punching a circular through hole 3 on the welding surface of the Cu/Fe/Cu material strip, milling a rectangular diversion trench 4 on the non-welding surface of the Cu/Fe/Cu material strip and near the through hole, and bending two ends of the Cu/Fe/Cu material strip into arc-striking angles 5 in a U shape to obtain the copper support member of the Cu/Fe/Cu laminated composite material strip. Through-hole 3 runs through whole copper support piece's thickness direction, and guiding gutter 4 bottom and through-hole 3 intercommunication.
S3: and (3) welding an AgSnO2 electric contact on the welding surface of the copper support by adopting Ag50CuZn welding flux and an induction welding mode to obtain the required electric assembly.
According to the embodiment, the contactor electric contact electric assembly with good performance and low cost is finally obtained, so that the electric contact, the copper piece and the arc striking angle are firmly welded, the strength of the copper supporting piece of the electric assembly is effectively improved, the side edge of the copper supporting piece is not exposed with Fe, and the problem of rusting of the electric assembly is solved; meanwhile, the test shows that the conductivity of the copper support is increased by 30% compared with that of the conventional product, and the electrical service life is increased by 20% compared with that of the conventional product.
Example 2
Referring to fig. 4 and 5, the structure of the electrical assembly is schematically illustrated, wherein the electrical assembly includes an electrical contact 1 and a copper support, wherein the electrical contact 1 is made of AgNi 10; the copper part 2 is made of a Cu/Fe/Cu laminated composite material belt material, the first metal layer is made of a copper belt, the middle metal layer is made of a low-carbon steel belt material, and the second metal layer is made of a Cu/H65 composite copper material.
In this embodiment, the method for manufacturing an electrical component includes the steps of:
s100: the copper strips, the low-carbon steel strips and the Cu/H65 composite copper materials are sequentially stacked, asymmetric cold rolling compounding is carried out, the layered composite material strips are obtained, and heat treatment is carried out. In the laminated composite material strip, the middle metal layer is low-carbon steel, the thickness of one outer side copper belt is 30% of the whole material strip, and the thickness of the other outer side Cu/H65 composite copper material is 5% of the whole material strip. The cross-sectional structure of the layered composite material belt is asymmetric. The heat treatment adopts the following process parameters: the temperature is 450 ℃, the time is 4 hours, and the atmosphere is N 2 。
S200: and (3) punching the layered composite material belt obtained from the S100 from the red copper belt layer with large thickness to the Cu/H65 composite copper material layer with small thickness, so that the red copper belt layer with large thickness wraps the side edge of the layered composite material belt. And punching a polygonal through hole 3 on the welding surface of the laminated composite material strip, milling a cross-shaped diversion trench 4 on the non-welding surface of the laminated composite material strip and near the through hole, and bending an arc striking angle 5 in a U shape to prepare the copper support.
S300: and welding an AgNi10 electric contact on the welding surface of the laminated composite material belt by adopting Ag15CuP welding flux and a resistance welding mode to obtain the required electric assembly.
This embodiment finally obtains the better relay electrical contact electrical component of performance for electrical contact, copper spare are firmly welded, make copper support piece's intensity effectively improve, and copper support piece's side does not expose Fe, have solved the problem of rusting of electrical component, and copper support piece conductivity ratio conventional product has increased 15%, and the electricity life-span has increased 10% than conventional product.
In the preparation of the electrical component in the embodiment, the method for preparing the electrical contact component by the punching mode of asymmetrically compounding and wrapping the side edge of the layered composite material belt by the outer metal layer is suitable for the preparation of electrical components in all fields of high-voltage electrical appliances, medium-voltage electrical appliances and low-voltage electrical appliances, solves the problem that conventional copper-clad steel is rusted due to iron exposure, can obtain the electrical contact component with high electrical performance while reducing the copper content, and has the advantages of high bonding strength of a composite interface, simple process, convenience in operation and no special requirement on equipment.
Example 3
Referring to fig. 6, a schematic structural diagram of an electrical assembly is shown, which includes: the device comprises an electric contact 1 and a copper support, wherein the electric contact 1 is made of AgCdO 12; the copper support 2 is a Cu/Fe/Cu layered composite material belt, the first metal layer and the second metal layer are made of CuNi alloy materials, and the middle metal layer is made of low-carbon steel materials.
A method of making an electrical assembly comprising the steps of:
s10: sequentially stacking the CuNi strip, the low-carbon steel strip and the CuNi strip, carrying out asymmetric cold rolling compounding to obtain a CuNi/low-carbon steel/CuNi layered composite material strip, and carrying out heat treatment. In the CuNi/low-carbon steel/CuNi material belt, the middle metal layer is a low-carbon steel layer, the thickness of one outer CuNi layer is 50% of the whole material belt, and the thickness of the other outer CuNi layer is 15% of the whole material belt. The cross-sectional structure of the CuNi/low carbon steel/CuNi material belt is asymmetric. The heat treatment adopts the following technological parameters, the temperature is 680 ℃, the time is 3 hours, and the atmosphere is ammonia decomposition atmosphere.
S20: and punching the CuNi/low-carbon steel/CuNi material belt obtained from S10 from the CuNi layer with large thickness to the CuNi layer with small thickness, so that the CuNi layer with large thickness wraps the side edge of the CuNi/low-carbon steel/CuNi copper part. And punching a rectangular through hole 3 on the welding surface (namely the CuNi layer with large thickness) of the copper support piece to prepare the copper piece. Because the copper support has no arc striking angle, the non-welding surface and the vicinity of the through hole of the copper support also have no cross-shaped diversion trench.
S30: and adopting an Ag30CuZn solder and carbon rod welding mode to weld the AgCdO12 electric contact on the welding surface of the CuNi/low-carbon steel/CuNi copper piece to obtain the required electric assembly.
This embodiment finally obtains the better circuit breaker electrical contact electrical component of performance for electrical contact, copper spare are firmly welded, make copper support piece's intensity effectively improve, and copper support piece's side does not expose Fe, have solved the problem of rusting of electrical component, and copper support piece conductivity ratio conventional product has increased 20%, and the electricity life-span has increased 16% than conventional product.
The production process of the Cu/Fe/Cu laminated composite material belt copper part is simple in steps, convenient to implement, low in input cost and capable of greatly improving the strength of the produced electrical assembly, effectively solving the problems that a copper support part is easy to rust, a clamping mechanism and unstable in contact in a high-humidity and high-heat environment and further improving the opening and closing performance of a circuit breaker.
To sum up, the utility model discloses effectively solve electric assembly and rust card mechanism, the easy perk of arc ignition angle, the welding climb a little and arrange the bad problem of sediment exhaust to reduce the temperature rise of electrical products and improve electrical products's electric life, shortened welding process, improved electric assembly's quality by a wide margin, reduced the quantity of high price copper, be fit for mass production,
Some embodiments of the present invention have been described above. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the invention.
Claims (8)
1. A copper support, comprising:
the material of the first metal layer is pure copper, copper alloy or composite copper material;
the second metal layer is made of pure copper, copper alloy or composite copper material and is the same as or different from the first metal layer;
the middle metal layer is made of iron or low-carbon steel; the middle metal layer is arranged between the first metal layer and the second metal layer, and the first metal layer, the middle metal layer and the second metal layer are compounded into a whole to form a laminated composite material belt;
the thickness of the first metal layer is larger than that of the second metal layer, the side edge of the layered composite material belt is coated by the first metal layer, the middle metal layer is not exposed in the air, the first metal layer serves as a welding surface, and the second metal layer and the middle metal layer serve as non-welding surfaces.
2. The copper support as claimed in claim 1, wherein the thickness of the first and second metal layers is 5-80% of the thickness of the entire laminated composite tape.
3. The copper support according to claim 1, wherein the welding surface is provided with a through hole penetrating through the thickness direction of the laminated composite material strip for exhausting and deslagging in the welding center area.
4. The copper support according to claim 3, wherein the non-soldering surface is provided with flow guide grooves, and the flow guide grooves are communicated with the through holes and are used for guiding the excessive solder at the soldering surface to two ends of the copper support.
5. Copper support according to claim 4, characterized in that said channels are rectangular or criss-crossed in shape.
6. The copper support according to claim 3, wherein the shape of the through-hole is any one of circular, rectangular, polygonal, elliptical, triangular, horseshoe-shaped.
7. The copper support according to claim 1, wherein both ends of the laminated composite strip are bent toward the non-welding surface to form an arc striking angle.
8. An electrical assembly, comprising: the copper support and electrical contact of any of claims 1-7, said electrical contact being soldered to a soldering surface of said copper support.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221413617.2U CN217426573U (en) | 2022-06-07 | 2022-06-07 | Copper support piece and electrical component |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221413617.2U CN217426573U (en) | 2022-06-07 | 2022-06-07 | Copper support piece and electrical component |
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| CN217426573U true CN217426573U (en) | 2022-09-13 |
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| CN202221413617.2U Active CN217426573U (en) | 2022-06-07 | 2022-06-07 | Copper support piece and electrical component |
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- 2022-06-07 CN CN202221413617.2U patent/CN217426573U/en active Active
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