Vacuum welding device based on magnetic field assisted positioning

Abstract

The utility model discloses a vacuum welding device based on magnetic field auxiliary positioning. The vacuum welding device comprises a vacuum box body, a magnet array adjusting system, a heating system and a welding positioning system. The magnet array adjusting system comprises a Halbach array permanent magnet plate driven by a telescopic adjusting device, the magnetic field intensity is adjustable in a range of 0.1-1T, and the N / S pole distance is adjustable in a range of 50-200mm; the heating system adopts the combination of an infrared heating tube and a heat insulation plate; the welding positioning system achieves accurate fixation of the heat pipe in a vacuum environment by utilizing Lorentz force through nickel wire conductive clamping.

Description

Technical Field

[0001] This utility model relates to the field of heat pipe welding technology, and is particularly applicable to welding devices that utilize Lorentz magnetic force to achieve precise positioning of heat pipes in a vacuum environment. It also relates to a vacuum welding device based on magnetic field-assisted positioning. Background Technology

[0002] Heat pipes have a thermal conductivity more than 100 times that of ordinary metals. This superior conductivity has led to the increasingly widespread application of heat pipe radiators in electronic devices, making heat pipe cooling technology a crucial technology for efficient heat dissipation in electronic equipment. A heat pipe radiator is a type of radiator where heat pipes are embedded into a metal substrate through welding. It boasts advantages such as high heat transfer efficiency, low cost, mature technology, and short production cycle, making it suitable for products that eliminate single-point heat sources or have high single-point heat source power. Currently, heat pipe radiators typically employ a low-temperature brazing process, where the heat pipe is embedded in a heat pipe groove and then coated with a low-temperature brazing filler metal for welding. However, the current process is complex, resulting in a relatively low product yield. This is because problems such as heat pipe floating during welding can lead to performance degradation or even product failure.

[0003] To address this issue, patent 202420199198.X proposes a heat pipe radiator welding device based on thermal convection and thermal radiation. The principle is that after the copper heat pipe is nickel-plated, the nickel-plated heat pipe is always firmly fixed in the bottom of the heat pipe groove due to the electromagnetic attraction force generated by the electromagnetic device after being energized. This avoids the need for mechanical fixing methods that affect the thermal performance of the heat pipe in traditional methods.

[0004] Patent 202323524143.6 proposes a tooling for welding heat pipe radiators. The principle is that the nickel-plated heat pipe is firmly fixed to the bottom of the heat pipe groove under the magnetic attraction of the tooling, thereby completely avoiding the problems of product performance degradation or even scrapping caused by the heat pipe floating during the traditional heat pipe radiator welding process.

[0005] The effectiveness of the two patents mentioned above, 202420199198.X and 202323524143.6, hinges on the requirement that a layer of nickel must be plated on the surface of the heat pipe. Only after nickel plating can the heat pipe generate a fixing force that attracts it in a magnetic field. However, the saturation magnetism of nickel is much lower than that of iron / cobalt. In addition, the thickness of the nickel plating layer on the surface of the heat pipe is generally on the micrometer level. Therefore, the nickel plating layer on the surface of the heat pipe results in a very weak attraction force in a magnetic field, which seriously affects the ability to generate a sufficiently large attraction force to fix the heat pipe in a magnetic field.

[0006] Therefore, how to generate a sufficiently strong adsorption force in a magnetic field to firmly fix the heat pipe to the bottom of the heat pipe tank without increasing costs is an urgent problem to be solved. Summary of the Invention

[0007] In view of this, in order to overcome the problems of product performance degradation or even scrapping caused by heat pipe floating during the welding process of heat pipe radiators, this utility model proposes a vacuum welding device based on magnetic field-assisted positioning. By using Lorentz magnetic force and energizing the heat pipe, the heat pipe can be accurately fixed in a vacuum environment, thus completely solving the problem of heat pipe floating during the welding process of heat pipe radiators.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A vacuum welding device based on magnetic field-assisted positioning, characterized in that it comprises:

[0010] (1) Vacuum chamber 1, which has heating and vacuuming functions, and is equipped with a vacuum extraction port 11 and a current input port 12.

[0011] (2) A magnet array adjustment system, comprising:

[0012] ①The telescopic adjustment device 2, the first end of which is fixed to the inner top surface and inner bottom surface of the vacuum chamber 1;

[0013] ②N / S pole permanent magnet array plate 3, connected to the second end of telescopic adjustment device 2, forms a Halbach array;

[0014] (3) Heating system, including:

[0015] ① Heat insulation plate 4 is placed between the upper and lower permanent magnet array plates 3;

[0016] ② The infrared heating tube 5 is installed between the upper and lower heat insulation plates 4;

[0017] (4) Welding positioning system, including:

[0018] ① Shelf 7 is located between the upper and lower infrared heating tubes 5;

[0019] ② The power-conducting module 6 is fixed on the shelf 7 and is a conductive wire clamping device.

[0020] Furthermore, the magnetic field strength of the N / S pole permanent magnet array plate 3 is adjustable in the range of 0.1-1T.

[0021] Furthermore, in the N / S pole permanent magnet array plate, the upper array plate is an N pole permanent magnet and the lower array plate is an S pole permanent magnet, with an adjustable spacing range of 50-200mm.

[0022] Furthermore, the conductive wire is a nickel wire, used to form an electrical connection with the heat pipe to be welded.

[0023] The beneficial effects of adopting the above technical solution in this utility model are as follows:

[0024] (1) Couple Lorentz magnetic force with vacuum heating to achieve the fixation and welding of heat pipe.

[0025] (2) This method only requires the copper heat pipe to be powered on, and does not require nickel plating as in the traditional method, which greatly reduces production costs. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a vacuum welding device based on magnetic field-assisted positioning proposed in this utility model.

[0027] Among them, 1 is the vacuum chamber, 11 is the vacuum extraction port, 12 is the current input port, 2 is the telescopic adjustment device, 3 is the N / S class permanent magnet array, 4 is the heat insulation plate, 5 is the infrared heating tube, 6 is the power supply module, and 7 is the shelf. Detailed Implementation

[0028] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0029] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Example:

[0031] A vacuum welding device based on magnetic field-assisted positioning, characterized in that it comprises:

[0032] (1) Vacuum chamber 1, which has heating and vacuuming functions, and is equipped with a vacuum extraction port 11 and a current input port 12.

[0033] (2) A magnet array adjustment system, comprising:

[0034] ①The telescopic adjustment device 2, the first end of which is fixed to the inner top surface and inner bottom surface of the vacuum chamber 1;

[0035] ②N / S pole permanent magnet array plate 3, connected to the second end of telescopic adjustment device 2, forms a Halbach array;

[0036] (3) Heating system, including:

[0037] ① Heat insulation plate 4 is placed between the upper and lower permanent magnet array plates 3;

[0038] ② The infrared heating tube 5 is installed between the upper and lower heat insulation plates 4;

[0039] (4) Welding positioning system, including:

[0040] ① Shelf 7 is located between the upper and lower infrared heating tubes 5;

[0041] ② The power-conducting module 6 is fixed on the shelf 7 and is a conductive wire clamping device.

[0042] Furthermore, the magnetic field strength of the N / S pole permanent magnet array plate 3 is adjustable within a range of 0.8T.

[0043] Furthermore, in the N / S pole permanent magnet array plate, the upper array plate is an N pole permanent magnet and the lower array plate is an S pole permanent magnet, with a spacing of 100mm.

[0044] Furthermore, the conductive wire is a nickel wire, used to form an electrical connection with the heat pipe to be welded.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vacuum welding device based on magnetic field-assisted positioning, characterized in that, include: (1) Vacuum chamber (1) has heating and vacuum functions, and is equipped with a vacuum extraction port (11) and a current input port (12). (2) A magnet array adjustment system, comprising: ①The telescopic adjustment device (2) has its first end fixed to the inner top and inner bottom surfaces of the vacuum chamber (1); ②N / S permanent magnet array plate (3) is connected to the second end of telescopic adjustment device (2) to form a Halbach array; (3) Heating system, including: ① Heat insulation plate (4) is set between the upper and lower permanent magnet array plates (3); ② The infrared heating tube (5) is placed between the upper and lower heat insulation plates (4); (4) Welding positioning system, including: ① A shelf (7) is placed between the upper and lower infrared heating tubes (5); ② The power-conducting module (6) is fixed on the shelf (7) and is a conductive wire clamping device.

2. The vacuum welding device based on magnetic field-assisted positioning according to claim 1, characterized in that: The magnetic field strength of the N / S pole permanent magnet array plate (3) is adjustable in the range of 0.1-1T.

3. The vacuum welding device based on magnetic field-assisted positioning according to claim 1, characterized in that: The N / S pole permanent magnet array plate (3) has an upper array plate made of N pole permanent magnets and a lower array plate made of S pole permanent magnets, with an adjustable spacing of 50-200mm.

4. The vacuum welding device based on magnetic field-assisted positioning according to claim 1, characterized in that: The conductive wire is a nickel wire, used to form an electrical connection with the heat pipe to be welded.

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