CN211939562U

CN211939562U - Welding structure of radiator

Info

Publication number: CN211939562U
Application number: CN201922242303.5U
Authority: CN
Inventors: 张青松; 朱忠龙
Original assignee: Yahao Electronic Hardware & Plastic Huizhou Co ltd
Current assignee: Yahao Electronic Hardware & Plastic Huizhou Co ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-11-17
Anticipated expiration: 2029-12-13

Abstract

The utility model provides a welded structure of radiator, it spouts the copper with the supersonic speed cold in a first side of a first work piece and is formed with the copper bisque, and a second side of a second work piece spouts the copper with the supersonic speed cold and is formed with the copper bisque, then with this first side and this second side through the welding joint. Through ultrasonic quick cold copper spraying and surface treatment processes of derusting and deoiling before ultrasonic quick cold copper spraying, roughness improvement and the like, the combination degree of the welding flux and the workpieces in the subsequent welding step is better, and the workpieces are not easy to separate after combination. If the workpieces are various structures of the radiator, the radiator manufactured by combining the various structures has high strength and is not easy to damage.

Description

Welding structure of radiator

Technical Field

The utility model relates to a welded structure of radiator, in particular to combine into the radiator with each structure of radiator through the welding.

Background

In the heat dissipation assembly, there are many minute structures, which are not easily finished by a single workpiece. For example, if a block is used as a workpiece to manufacture a fin set, a plurality of fins must be cut on the block, which is difficult to process and greatly weakens the rigidity of the fins. Therefore, a plurality of fins and a base are generally manufactured on a plurality of workpieces, and then the fins are fixed on the base by a welding method. However, some heat dissipation assemblies are made of aluminum or aluminum alloy, but aluminum or aluminum alloy has the characteristic of being difficult to weld, and two aluminum or aluminum alloy workpieces combined in a welding manner are easy to separate when subjected to external force.

In view of the above, a better solution is proposed, and a problem to be solved is needed in the art.

SUMMERY OF THE UTILITY MODEL

The present invention provides a heat sink structure, which can make the heat sink manufactured by the welding method have higher strength and not easy to be damaged.

To achieve the above object, the present invention provides a welding method for a heat sink structure, which comprises the following steps in sequence:

derusting and deoiling a first side surface of a first workpiece and a second side surface of a second workpiece;

improving the roughness of the first side surface and the second side surface;

carrying out ultrasonic quick cold copper spraying on the first side surface and the second side surface; and

and the first side surface and the second side surface are jointed by welding.

Therefore, the utility model has the advantages of, spout rust cleaning and deoiling, promote surface treatment processes such as roughness before copper and the cold copper that spouts of supersonic speed through the cold of supersonic speed for the solder is better with the combination degree of work piece in the follow-up welding step, and then makes each work piece combine and difficult separation. If the workpieces are various structures of the radiator, the radiator manufactured by combining the various structures has high strength and is not easy to damage.

In order to achieve the above object, the present invention provides a welding structure of a heat sink, including:

a first workpiece having a first side;

a second workpiece having a second side;

a copper interposer is formed between the first side and the second side.

Therefore, the utility model has the advantages that, a first side of a first work piece is formed with the copper bisque with the cold copper that spouts of supersonic speed, and a second side of a second work piece is formed with the copper bisque with the cold copper that spouts of supersonic speed, then with this first side and this second side through the welding joint. Copper powder layers are formed on a first side surface of a first workpiece and a second side surface of a second workpiece through ultrasonic rapid cold copper spraying, and are combined in a subsequent welding process to form a copper intermediate layer, so that the workpieces are combined and are not easy to separate. If the workpieces are various structures of the radiator, the radiator manufactured by combining the various structures has high strength and is not easy to damage.

In the welding structure of the radiator, after removing rust and oil, the dyne number of the first side surface and the dyne number of the second side surface are greater than or equal to 38.

In the above-mentioned soldering structure for a heat sink, after the roughness is increased, the roughness of the first side surface and the second side surface is 15 μm to 25 μm.

In the welding structure of the heat sink, when supersonic cold spraying copper is performed, the pressure of the gas source is 0.4MPa to 1.0MPa, the particle size of the copper powder is 10 μm to 50 μm, the surface porosity of the copper powder is less than or equal to 10%, and the temperature of the first workpiece and the second workpiece is less than or equal to 180 ℃.

In the welding structure of the radiator, when supersonic speed cold copper spraying is carried out, the pressure of an air source is 0.5MPa to 0.8 MPa.

In the welding structure of the radiator, when supersonic speed cold copper spraying is carried out, the particle size of the copper powder is 15-40 μm.

In the welding structure of the radiator, when the supersonic speed cold copper spraying is carried out, the surface porosity of the copper powder is less than or equal to 5 percent.

In the welding structure of the heat sink, when the supersonic cold copper spraying is performed, the temperature of the first workpiece and the second workpiece is less than or equal to 150 ℃.

In the above-mentioned welding structure of the heat sink, when the first side surface and the second side surface are joined by welding, the temperature of the first workpiece and the temperature of the second workpiece are greater than or equal to 260 ℃.

In the above welding structure of the heat sink, the partial region of the first side surface and the partial region of the second side surface are sequentially subjected to rust and oil removal, roughness improvement, and supersonic cooling copper spraying, and then the partial region of the first side surface and the partial region of the second side surface are welded and joined.

Drawings

Fig. 1 is a cross-sectional view of a welded structure of a heat sink according to the present invention.

Wherein, the reference numbers:

first workpiece 1

First side 11

Second workpiece 2

Second side 21

Copper interposer 3

Detailed Description

Please refer to fig. 1. The utility model provides a welded structure of radiator, it is used for combining two work piece welding, and each work piece can be the partial structure of radiator, consequently constitutes a radiator after a plurality of work piece welding combine promptly. For example, the heat sink may be a set of fins.

The following description is given by taking a first workpiece and a second workpiece as examples to receive the welding structure of the present invention. Specifically, the first workpiece 1 may include a plurality of side surfaces, and one of the side surfaces is the first side surface 11; similarly, the second workpiece 2 may comprise a plurality of sides, wherein one side 11 is a second side 21. The first workpiece 1 may be aluminum, copper, or alloys thereof, and the second workpiece 2 may be aluminum, copper, steel, or alloys thereof. In other words, the present invention can be applied to welding of aluminum and aluminum, aluminum and copper, aluminum and steel, etc. The utility model discloses a welding method contains following step according to the preface: derusting and deoiling, roughness improvement, ultrasonic quick cold copper spraying and welding joint.

In the rust removing and oil removing step, rust removing and oil removing are performed on the first side surface 11 and the second side surface 21, and after the rust removing and oil removing, the dyne number of the first side surface 11 and the second side surface 21 is greater than or equal to 36, and preferably greater than or equal to 38. Specifically, after removing rust and oil, in order to confirm the dyne number of the first side surface 11 or the second side surface 21, a dyne pen having a dyne number of 38 is drawn on the first side surface 11 and the second side surface 21. If the mark formed by the ink of the dyne pen remains stable or diffuses outward, i.e., the dynes of the first side 11 and the second side 21 are greater than or equal to 38, the subsequent processing can be performed. However, if the mark formed by the ink of the pen shrinks inward and even forms a drip, it means that the dynes of the first side 11 and the second side 21 are less than 38, and the rust removal and the oil removal should be performed until the dynes are greater than or equal to 38.

In the step of increasing the roughness, sand grains with a mesh size of 80 mesh or 120 mesh may be used for surface blasting until the roughness of the first side 11 and the second side 21 reaches 10 μm to 35 μm, and preferably 15 μm to 25 μm.

In the supersonic cold copper spraying step, a copper spraying device blows high-pressure gas containing copper powder to the first workpiece 1 and the second workpiece 2 so that the copper powder is embedded in the first side surface 11 and the second side surface 21. The foregoing steps of removing rust and oil and improving roughness are all intended to facilitate the engagement of copper powder with the first and

second workpieces

1 and 2, and the copper spraying step can be performed with a relatively low pressure gas or at a relatively low temperature. In the embodiment, the pressure of an air source provided by the copper spraying device can be 0.4MPa to 1.0MPa, the particle size of the copper powder is 10 mu m to 50 mu m, and the surface porosity of the copper powder is less than or equal to 10 percent; welding the first side surface 11 and the second side surface 21 after copper spraying, and combining the surfaces of the copper powder between the first side surface 11 and the second side surface 21 to form a copper intermediary layer 3; meanwhile, the temperature of the first side surface 11 and the second side surface 21 is less than or equal to 180 ℃, so that high-temperature stress deformation of the workpiece made of aluminum or copper materials is avoided. Preferably, the pressure of a gas source is 0.5MPa to 0.8MPa, the particle size of the copper powder is 15 mu m to 40 mu m, and the surface porosity of the copper powder is less than or equal to 5 percent; welding the first side surface 11 and the second side surface 21 after copper spraying, and combining the surfaces of the copper powder between the first side surface 11 and the second side surface 21 to form a copper intermediary layer 3; meanwhile, the temperature of the first side surface 11 and the second side surface 21 is less than or equal to 150 ℃, so that the workpiece made of aluminum or copper materials is prevented from high-temperature stress deformation.

Finally, in the step of welding the workpieces made of steel or other alloy materials, the first side surface 11 and the second side surface 21 after the surface treatment process are welded and joined, and in the embodiment, the first workpiece 1 and the second workpiece 2 are heated to a temperature of 260 ℃ or higher before welding. Thereby, the first workpiece 1 and the second workpiece 2 are tightly combined and are not easy to separate.

The utility model discloses an among the welded structure, can only carry out rust cleaning and deoiling, promotion roughness and the cold copper spraying of supersonic speed according to the preface to the subregion of first side 11 and the subregion of second side 21, then make this subregion of first side 11 and this subregion of second side 21 weld joint again, rather than carry out aforementioned surface treatment flow and weld joint with whole first side 11 and whole second side 21. Therefore, the time and labor cost for processing can be saved.

The utility model discloses a bonding strength between two work pieces adds by a wide margin among the welded structure, if use the face of weld to carry out the drawing force test for 48 millimeters by 51 millimeters's rectangle, can bear and be greater than 70 kilograms of heavy pulling force. Therefore, through the utility model discloses a welded structure combines the radiator intensity that the back was made with each structure of radiator higher and difficult quilt destroys.

Although the present invention has been described with reference to the above embodiments, it should be understood that the scope of the present invention is not limited to the above embodiments, and other modifications and variations can be made without departing from the spirit and scope of the present invention.

Claims

1. A welded structure of a heat sink, comprising:

a first workpiece having a first side;

a second workpiece having a second side;

a copper interposer is formed between the first side and the second side.

2. The heat spreader solder structure of claim 1, wherein the copper interposer has a porosity of 10% or less.

3. The soldering structure of a heat sink according to claim 1, wherein the roughness of the first side surface and the second side surface is 15 μm to 25 μm.

4. The welded structure of a heat sink according to claim 1, wherein one of the first and second workpieces is aluminum, copper or an alloy thereof.

5. The heat spreader solder structure of claim 1, wherein the copper interposer has a porosity of less than or equal to 5%.

6. The soldering structure of a heat sink according to claim 1, wherein the roughness of the first side surface and the second side surface is 15 μm to 35 μm.