Double-layer coil for high-frequency induction welding

Abstract

The utility model discloses a double-layer coil for high-frequency induction welding, which comprises an upper-layer coil, a lower-layer coil and a lower-layer coil, the upper-layer coil is of an annular structure, an area enclosed by the annular structure is an induction heating area, and the induction heating area is used for placing a product to be welded; the lower-layer coil is arranged below the upper-layer coil, the first end of the lower-layer coil is connected with the upper-layer coil and then is connected with a first pole rod, the second end of the lower-layer coil is connected with a second pole rod, and the first pole rod and the second pole rod are used for being connected with a power source. Compared with the prior art, the utility model can solve the problems of corrosion, hole loosening, non-melting or over-melting of products caused by non-uniform heating of workpieces during brazing.

Description

Technical Field

[0001] This utility model relates to the field of brazing technology, and in particular to a double-layer coil for high-frequency induction welding. Background Technology

[0002] High-frequency induction brazing involves a high-frequency alternating current flowing through a conductor, creating eddy currents within the workpiece. The resistance energy of these eddy currents rapidly heats the workpiece, achieving the required brazing temperature through external control. The energy and current distribution in high-frequency induction brazing are controlled by an induction coil. The coil's shape directly affects the heating effect on the workpiece. Ideally, based on the skin effect and proximity effect, the coil and workpiece cross-sections should be identical with a uniform gap. However, in reality, workpieces are often irregularly shaped, leading to uneven heating and resulting in defects such as erosion, porosity, incomplete melting, or over-melting. Utility Model Content

[0003] The purpose of this invention is to provide a double-layer coil for high-frequency induction welding to solve the problem of uneven heating of workpieces during brazing, which leads to product corrosion, porosity, incomplete melting or over-melting.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a double-layer coil for high-frequency induction welding, comprising:

[0005] The upper coil is a ring structure, and the area enclosed by the ring structure is an induction heating area, which is used to place the product to be welded.

[0006] A lower coil is disposed below the upper coil. The first end of the lower coil is connected to the upper coil and then to the first pole. The second end of the lower coil is connected to the second pole. The first pole and the second pole are used to connect to a power source.

[0007] As a further description of the above technical solution:

[0008] The lower coil has the same shape as the upper coil.

[0009] As a further description of the above technical solution:

[0010] The lower layer coil is in the shape of a "U" or an "∞".

[0011] As a further description of the above technical solution:

[0012] The diameter of the lower coil is 6mm.

[0013] As a further description of the above technical solution:

[0014] The upper coil is provided with two U-shaped structures that are concave into the induction heating area.

[0015] As a further description of the above technical solution:

[0016] Both the upper coil and the lower coil are made of copper.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: by adding a lower coil with a diameter of 6mm below the existing upper coil, the lower coil and the upper coil are connected in series on the same power supply and placed below the current collector, the heating of the current collector is balanced, thereby improving welding, reducing the influence of environmental factors on welding, and helping to reduce the generation of corrosion, pinholes, and incomplete dissolution, thereby improving welding quality and increasing production yield. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a double-layer coil for high-frequency induction welding.

[0020] Figure 2 This is a top view of a double-layer coil for high-frequency induction welding.

[0021] Figure 3 This is a schematic diagram of a double-layer coil for high-frequency induction welding, as an alternative embodiment.

[0022] Figure 4 This is a reference diagram showing the current usage status of the coil.

[0023] Legend:

[0024] 1. Upper coil; 2. Induction heating area; 3. Lower coil; 4. Product to be welded; 5. First end; 6. First pole; 7. Second end; 8. Second pole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-4 This utility model provides a technical solution: a double-layer coil for high-frequency induction welding, comprising:

[0027] Upper coil 1, the upper coil 1 is a ring structure, the area enclosed by the ring structure is the induction heating area 2, the induction heating area 2 is used to place the product to be welded 4;

[0028] The lower coil 3 is located below the upper coil 1. The first end 5 of the lower coil 3 is connected to the upper coil 1 and then connected to the first pole 6. The second end 7 of the lower coil 3 is connected to the second pole 8. The first pole 6 and the second pole 8 are used to connect to the power supply.

[0029] The lower coil 3 has the same shape as the upper coil 1. The upper coil is roughly the same shape as the waist-shaped hole, while the shape of the lower coil can be selected according to the actual situation.

[0030] The lower coil 3 is in the shape of a "U" or an "∞". Specifically, in this embodiment, the lower coil is the lower coil.

[0031] The diameter of the lower coil 3 is 6mm.

[0032] The upper coil 1 is provided with two U-shaped structures that are recessed into the induction heating area. This reduces the width of the induction heating area, making it easier to fix the product to be welded.

[0033] Both the upper coil 1 and the lower coil 3 are made of copper. Copper has good electrical conductivity and is relatively inexpensive. Other conductive metals, such as gold and silver, can also be selected.

[0034] Working Principle: During welding, if the temperature difference between the measured temperatures at the current collector points is too large, a lower coil with a diameter of 6mm is added below the existing upper coil to balance the welding temperature and ensure a uniform magnetic field distribution. The lower coil is connected in series with the upper coil and powered by the same power source. This lower coil is placed below the current collector to balance the heating of the current collector, thereby improving welding, reducing the impact of environmental factors on the welding process, and helping to reduce the formation of corrosion, pinholes, and incomplete melting, thus improving weld quality and production yield. The double-layer coil structure can balance heating, effectively solving the problem of uneven heating and reducing the impact of the environment on brazing, thereby improving weld quality.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A double-layer coil for high-frequency induction welding, characterized in that, include: The upper coil is a ring structure, and the area enclosed by the ring structure is an induction heating area, which is used to place the product to be welded. A lower coil is disposed below the upper coil. The first end of the lower coil is connected to the upper coil and then to the first pole. The second end of the lower coil is connected to the second pole. The first pole and the second pole are used to connect to a power source.

2. The double-layer coil for high-frequency induction welding according to claim 1, characterized in that, The lower coil has the same shape as the upper coil.

3. A double-layer coil for high-frequency induction welding according to claim 1, characterized in that, The lower coil is in the shape of a "U" or an "∞".

4. A double-layer coil for high-frequency induction welding according to claim 1, characterized in that, The diameter of the lower coil is 6mm.

5. A double-layer coil for high-frequency induction welding according to claim 1, characterized in that, The upper coil is provided with two U-shaped structures that are concave into the induction heating area.

6. A double-layer coil for high-frequency induction welding according to claim 1, characterized in that, Both the upper coil and the lower coil are made of copper.

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