A NdFeB Halbach structural product welding device

Abstract

The present invention provides a NdFeB Halbach structural product welding device, including: a clamp, a limiting groove for accommodating the NdFeB Halbach structural product and cooperating with each other is provided on the clamp, the depth of the limiting groove is greater than the height of the NdFeB Halbach structural product, the limiting groove is located higher than the inner wall of the NdFeB Halbach structural product and is provided with a plurality of air outlets, and an air inlet connected to each air outlet is provided on the outer wall of the clamp, and the air inlet is used to access an inert gas. In this technical solution, the clamp not only plays a role in limiting the position of the NdFeB Halbach structural product, but also, during the welding process, the inert gas introduced into the side wall air outlet can reduce the thermal effect of the welding process, so that it is not easy to reduce the magnetic flux value of the NdFeB Halbach structural product, and the air outlet is closer to the welding area of ​​the NdFeB Halbach structural product, so that the inert gas distribution is more sufficient, which greatly suppresses the thermal effect of the welding process.

Description

Technical Field

[0001] The invention generally relates to the field of NdFeB product welding, and in particular to a NdFeB Halbach structural product welding device. Background Art

[0002] The Halbach array is a magnet structure that is close to an ideal structure in engineering. Its goal is to produce the strongest magnetic field with the least amount of magnets.

[0003] At present, the industrial preparation of NdFeB Halbach mainly adopts the method of glue bonding, and the glue mainly uses thermosetting glue. During the bonding process, it is necessary to bake and connect at the same time; however, the secondary processed NdFeB Halbach structure products still need to be fixed on the bracket. During the fixing process, they need to be baked for the second time. During the secondary baking, due to the repulsive force of the Halbach structure, there is a risk of cracking during baking, resulting in a reduction in the yield of finished products.

[0004] The improved NdFeB Halbach structural product will be prepared by laser welding, which not only does not require baking, but can also complete the connection operation in 1 second, greatly improving the connection efficiency.

[0005] However, due to the instantaneous high temperature of laser welding, the magnetic flux value of the product itself is reduced after magnetization, which has a greater impact on small NdFeB Halbach structural products. Summary of the invention

[0006] According to the present invention, in view of the problems existing in the above-mentioned prior art, a NdFeB Halbach structural product welding device is provided, including: a clamp, a limiting groove for accommodating the NdFeB Halbach structural product and cooperating with each other is opened on the clamp, the depth of the limiting groove is greater than the height of the NdFeB Halbach structural product, the limiting groove is located higher than the inner wall of the NdFeB Halbach structural product and is provided with a plurality of air outlets, and an air inlet duct interconnected with each air outlet is opened on the outer wall of the clamp, and the air inlet duct is used to connect inert gas; an exhaust hole is opened on the bottom wall of the limiting groove, and an exhaust duct interconnected with the exhaust hole is opened on the outer wall of the clamp, and the exhaust duct is connected to an exhaust pump; a plurality of strip-shaped negative pressure grooves are opened on the bottom wall of the limiting groove, and the exhaust holes are located on the bottom wall of the negative pressure groove. With the above technical features, the fixture not only plays a role in limiting the position of the NdFeB Halbach structural product, but also, during the welding process, the inert gas introduced into the side wall outlet can reduce the thermal impact of the welding process, so that it is not easy to reduce the magnetic flux value of the NdFeB Halbach structural product. Moreover, the outlet hole is closer to the welding area of ​​the NdFeB Halbach structural product, making the inert gas distribution more sufficient, greatly suppressing the thermal effect of the welding process. When working, the air pump is started, and the exhaust hole continuously extracts the air in the limit groove, A stable gas flow channel is formed above the limit groove and the diffusion of inert gas is limited, so that the inert gas continues to diffuse above the limit groove, and during the vacuum hole vacuuming, the negative pressure also adsorbs the NdFeB Halbach structural product, thereby ensuring the stability of the fixation of the NdFeB Halbach structural product; furthermore, the negative pressure groove has a large opening range and is in contact with all components of the NdFeB Halbach structural product, ensuring the stability of the welding process of all components of the NdFeB Halbach structural product.

[0007] In some embodiments, a strip-shaped airbag is arranged on the inner wall of the limiting groove which is higher than the NdFeB Halbach structural product. The airbag is arranged along the length direction of the inner wall of the containing groove. The airbag is interconnected with the air outlet, and a plurality of through holes are provided on the airbag. Therefore, the airbag is made of flexible material, and when the NdFeB Halbach structural product is fixed, it will not hinder the installation and positioning of the NdFeB Halbach structural product. During the welding process, as the inert gas rushes in, the airbag is filled and the volume increases. The enlarged airbag is pressed on the edge of the NdFeB Halbach structural product, which further ensures the stability of the fixation of the NdFeB Halbach structural product. In addition, the inert gas blown out from the airbag also reduces the thermal effect during the welding process.

[0008] In some embodiments, the limiting groove is higher than the inner wall of the NdFeB Halbach structure product, and a strip-shaped receiving groove is opened, the air outlet is located on the inner wall of the receiving groove, and the inflatable bag is arranged in the receiving groove. Therefore, the receiving groove plays a covering and protective role on the inflatable bag, reduces the contact between the external environment and the inflatable bag, and also avoids the installation position when the NdFeB Halbach structure product is placed.

[0009] In some embodiments, after the inflatable bag is filled with gas, the side thereof facing the limiting groove is arc-shaped. Thus, after the volume of the inflatable bag increases, its side wall is arc-shaped, so that the gas blown out of the through hole is more dispersed, more widely distributed, and more comprehensively covered, further suppressing the thermal effect during the welding process.

[0010] In some embodiments, a base is also included, and the base is provided with a plurality of fixing grooves for placing the clamps, and the fixing grooves cooperate with the outer contour of the clamps, and the air inlet and the air outlet are both located on the bottom wall of the clamp, and the bottom wall of the fixing groove is provided with a first pair of interfaces interconnected with the air inlet, and a second pair of interfaces interconnected with the air outlet, and the side wall of the base is provided with a third pair of interfaces interconnected with the first pair of interfaces, and the side wall of the base is also provided with a fourth pair of interfaces interconnected with the second pair of interfaces, and the third pair of interfaces is connected to the inert gas, and the fourth pair of interfaces is used to connect to the vacuum pump. Thus, the base provides a plurality of fixing positions for the clamps, and the NdFeB Halbach structural products on the plurality of clamps can be welded at the same time, and the normal inlet of the inert gas will not be affected.

[0011] In some embodiments, a first magnet is embedded on the bottom wall of the fixing groove, and a second magnet that is magnetically attracted to the first magnet is embedded on the bottom wall of the clamp. This makes it more stable for workers to move the base, and it is not easy for the clamp and the base to separate from each other, ensuring the safety of the base displacement and the stability of each clamp during welding.

[0012] In some embodiments, a notch is formed at each of the four corners of the limiting groove away from the center of the limiting groove. Therefore, the opening of the notch does not affect the limiting of the NdFeB Halbach structure product, and the corners of the NdFeB Halbach structure product are exposed to the outside, making it easy for the NdFeB Halbach structure product to be separated from the fixture.

[0013] It should be understood that the contents described in the summary of the invention are not intended to limit the key or important features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1The overall structure schematic diagram of a NdFeB Halbach structural product welding device provided by an embodiment of the present invention is shown;

[0015] Figure 2 The overall structural schematic diagram of a fixture in a NdFeB Halbach structural product welding device provided by an embodiment of the present invention is shown;

[0016] Figure 3 A schematic diagram of the bottom structure of a fixture in a NdFeB Halbach structural product welding device provided by an embodiment of the present invention is shown;

[0017] Figure 4 A schematic cross-sectional view of a fixture in a NdFeB Halbach structural product welding device provided by an embodiment of the present invention is shown;

[0018] Figure 5 A schematic diagram of the base structure in a NdFeB Halbach structural product welding device provided by an embodiment of the present invention is shown.

[0019] Explanation of symbols

[0020] 1. NdFeB Halbach structural product; 21. Machine body; 22. Welding platform; 23. Welding head; 24. Four-axis driving mechanism; 3. Fixture; 31. Limiting groove; 32. Notch; 33. Air outlet; 34. Air inlet; 35. Air extraction hole; 36. Air outlet; 37. Negative pressure groove; 38. Receiving groove; 4. Inflatable bag; 41. Through hole; 5. Base; 51. Fixing groove; 52. First pair of interfaces; 53. Second pair of interfaces; 54. Third pair of interfaces; 55. Fourth pair of interfaces; 6. First magnet; 7. Second magnet. DETAILED DESCRIPTION

[0021] Hereinafter, preferred embodiments (or implementation modes) of the present invention will be described in detail with reference to the accompanying drawings.

[0022] The present invention provides a NdFeB Halbach structural product welding device, which includes a body 21, a welding platform 22 is provided on the body 21, a welding head 23 is provided above the welding platform 22, and the welding head 23 is connected to the welding body 21 through a four-axis driving mechanism 24. The four-axis driving mechanism 24 is a prior art in the art and will not be described in detail here. A power device for providing energy to the welding head 23 is also provided in the body 21, and a clamp 3 for the NdFeB Halbach structural product 1 before welding is provided on the welding platform 22. The clamp 3 can not only limit and fix the NdFeB Halbach structural product 1 before welding, but also provide inert gas in the direction of the NdFeB Halbach structural product 1 during welding to reduce the thermal effect caused by the instantaneous high temperature of welding and ensure the magnetic flux value contained in the NdFeB Halbach structural product 1.

[0023] Reference below Figure 1-Figure 5 To describe a NdFeB Halbach structural product welding device of the present invention.

[0024] Figure 1 The overall structure diagram of a NdFeB Halbach structural product welding device provided by an embodiment of the present invention is shown. Figure 1 As shown, this embodiment provides a NdFeB Halbach structural product welding device including a body 21, a welding platform 22 is horizontally arranged on the body 21, a welding head 23 is arranged above the welding platform 22, and the welding head 23 is connected to the body 21 through a four-axis driving mechanism 24, so as to achieve multi-directional displacement of the welding head 23. A power device for providing energy to the welding head 23 is also arranged in the body 21, and the four-axis driving mechanism 24 and the power device are both prior arts in the art, and will not be described in detail here.

[0025] Figure 2 The overall structure diagram of the clamp 3 in the welding device of a NdFeB Halbach structural product 1 provided by an embodiment of the present invention is shown. Figure 1 and Figure 2 A clamp 3 for the NdFeB Halbach structural product 1 before welding is provided on the welding platform 22. The clamp 3 is a rectangular block, and a limiting groove 31 for accommodating the NdFeB Halbach structural product 1 is provided on its upper surface. The shape of the limiting groove 31 cooperates with the NdFeB Halbach structural product 1, but the depth of the limiting groove 31 is greater than the thickness of the NdFeB Halbach structural product 1, so that after the NdFeB Halbach structural product 1 is placed in the limiting groove 31, the end of the limiting groove 31 is higher than the surface of the NdFeB Halbach structural product 1.

[0026] Since the installed NdFeB Halbach structural product 1 is lower than the end of the limiting groove 31, it is inconvenient to directly remove the NdFeB Halbach structural product 1 from the limiting groove 31 by hand, so a notch 32 is opened at the four corners of the limiting groove 31 away from the center of the NdFeB Halbach structural product 1, so that the NdFeB Halbach structural product 1 can be removed at the notch 32 by tools without affecting the limiting of the NdFeB Halbach structural product 1, thereby improving the installation and disassembly efficiency of the NdFeB Halbach structural product 1.

[0027] In some embodiments, a plurality of air outlets 33 are provided on the relative inner walls of the limiting groove 31, and the air outlets 33 are arranged equidistantly along the sides of the limiting groove 31, and the air outlets 33 are located in an area higher than the surface of the NdFeB Halbach structural product 1. An air inlet 34 is provided on the outer wall of the fixture 3, which is interconnected with the air outlet 33 and is interconnected with the external inert gas. The inert gas is mainly stored in the form of a gas tank. After the gas tank is opened, the inert gas will be discharged from the air outlet 33 through the air inlet 34 under the action of pressure. As the inert gas diffuses, it is ensured that the NdFeB Halbach structural product 1 is within the range of the inert gas, and the influence of the thermal effect can be effectively reduced during the laser welding process.

[0028] In some embodiments, a plurality of air extraction holes 35 are provided on the bottom wall of the limit groove 31, and an air outlet 36 interconnected with each air extraction hole 35 is provided on the outer wall of the fixture 3, and an air extraction pump is connected to the air outlet 36. Affected by the size of the NdFeB Halbach structural product 1, the air extraction pump can be set as a micro air pump. When the NdFeB Halbach structural product 1 is placed into the limit groove 31, the air extraction pump works, which can not only allow the air on the surface of the NdFeB Halbach structural product 1 to enter the air extraction holes 35 through the gap of the NdFeB Halbach structural product 1, but also form a stable gas flow under the continuous supply of inert gas, thereby weakening the dispersion of the inert gas; and under the generated negative pressure, the NdFeB Halbach structural product 1 is tightly attached to the bottom wall of the limit groove 31, ensuring the stability of the positioning of the NdFeB Halbach structural product 1.

[0029] In order to further improve the firmness of the adsorption between the NdFeB Halbach structure product 1 and the bottom wall of the limiting groove 31, a plurality of strip-shaped negative pressure grooves 37 are spaced apart on the bottom wall of the limiting groove 31 to increase the contact range with the NdFeB Halbach structure product 1, and the exhaust hole 35 is opened on the bottom wall of the negative pressure groove 37. When the exhaust hole 35 draws air, a negative pressure cavity is formed in the negative pressure groove 37, so that each area of ​​the NdFeB Halbach structure product 1 is stably fixed on the bottom wall of the limiting groove 31.

[0030] Figure 3 The bottom structure diagram of the fixture 3 in the welding device of a NdFeB Halbach structural product 1 provided by an embodiment of the present invention is shown. Figure 3 As shown, the air inlet duct 34 and the air extraction hole 35 are both opened on the bottom wall of the fixture 3 to restrict the remaining connecting pipelines to the bottom, thereby reducing the space occupied by the surrounding pipeline fixation.

[0031] Figure 4 The figure shows a schematic cross-sectional view of a fixture 3 in a welding device for a NdFeB Halbach structural product 1 provided by an embodiment of the present invention. Figure 4As shown, in some embodiments, a strip-shaped receiving groove 38 is opened along the edge of the limiting groove 31 on the relative inner wall of the limiting groove 31, and the lower edge of the receiving groove 38 is lower than the upper surface of the NdFeB Halbach structure product 1, and the above-mentioned air outlet holes 33 are all opened on the bottom wall of the receiving groove 38, and a strip-shaped inflatable bag 4 is arranged in the receiving groove 38, and the inflatable bag 4 is interconnected with each air outlet hole 33 and connected with the edge of the air outlet hole 33. When the inert gas is filled, the inflatable bag 4 is filled with gas and expands toward the outside of the containing groove 38. Since the lower edge of the containing groove 38 is lower than the upper surface of the NdFeB Halbach structural product 1, the inflatable bag 4 partially squeezes the edge of the NdFeB Halbach structural product 1. The inflatable bag 4 wraps the edge of the NdFeB Halbach structural product 1, and exerts a downward force on the NdFeB Halbach structural product 1, thereby improving the stability of the NdFeB Halbach structural product 1 in the containing groove 38. As the gas rushes into the inflatable bag 4, a plurality of through holes 41 are spaced apart on the side away from the containing groove 38, so that the inert gas is evenly distributed in the welding area of ​​the NdFeB Halbach structural product 1. Moreover, after the inflatable bag 4 is inflated, the side away from the containing groove 38 is arc-shaped, so that the angles of each through hole 41 are different, resulting in a more extensive and uniform distribution of the inert gas. Moreover, the pressure of the inert gas supply not only ensures the uniform ejection of the inert gas, but also ensures a constant pressure inside the inflatable bag 4, thereby protecting the inflatable bag 4.

[0032] In order to improve the welding efficiency of the NdFeB Halbach structural product 1, a single clamp 3 needs to be reciprocated to install and disassemble the NdFeB Halbach structural product 1 during welding. Therefore, the time consumption caused by the installation and disassembly of the NdFeB Halbach structural product 1 can be reduced by increasing the number of clamps 3 and performing unified air supply and unified air exhaust. Figure 5 The schematic diagram of the structure of the base 5 in the welding device of the NdFeB Halbach structural product 1 provided by the embodiment of the present invention is shown. Figure 5As shown, the welding device also includes a base 5, and a plurality of fixing grooves 51 are provided on the upper surface of the base 5. The shape of the fixing grooves 51 matches the outer contour of the fixture 3, but the depth of the fixing grooves 51 is lower than the height of the fixture 3, so as to facilitate the installation and removal of the fixture 3. A first docking port 52 and a second docking port 53 are provided at the bottom of each fixing groove 51. The position of the first docking port 52 corresponds to the position of the air inlet 34 after the fixture 3 is inserted, and the position of the second docking port 53 corresponds to the position of the air outlet 36 after the fixture 3 is inserted. A third docking port 54 and a fourth docking port 55 are also provided on the peripheral side of the base 5. The third docking port 54 is connected to each first docking port 52 inside the base 5, and the fourth docking port 55 is connected to each second docking port 53 inside the base 5. The third docking port 54 is used to be connected to the inert gas pipeline, and the fourth docking port 55 is used to be connected to the vacuum pump, so that the common vacuuming and gas supply operation of each fixture 3 is realized through the vacuum pump and the introduction of the Noxing gas, thereby improving the welding efficiency.

[0033] refer to Figure 3 and Figure 5 As shown, a first magnet 6 is embedded on the bottom wall of each fixing groove 51, and a second magnet 7 is embedded on the bottom wall of the clamp 3. When the clamp 3 is inserted into the corresponding fixing groove 51, the positions of the first magnet 6 and the second magnet 7 correspond to each other and are magnetically attracted to each other, ensuring the stability of the connection between the clamp 3 and the base 5, thereby improving the overall stability of the base 5 when moving.

[0034] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A NdFeB Halbach structural product welding device, characterized in that: include: A fixture (3), the fixture (3) is provided with a limiting groove (31) for accommodating the NdFeB Halbach structure product (1) and cooperating with each other, the depth of the limiting groove (31) is greater than the height of the NdFeB Halbach structure product (1), the limiting groove (31) is located higher than the inner wall of the NdFeB Halbach structure product (1) and is provided with a plurality of air outlets (33), and the outer wall of the fixture (3) is provided with an air inlet (34) interconnected with each air outlet (33), and the air inlet (34) is used to connect with an inert gas; An air extraction hole (35) is provided on the bottom wall of the limiting groove (31), an air outlet (36) which is in communication with the air extraction hole (35) is provided on the outer wall of the clamp (3), and an air extraction pump is connected to the air outlet (36); A plurality of strip-shaped negative pressure grooves (37) are provided on the bottom wall of the limiting groove (31), and the air extraction holes (35) are located on the bottom wall of the negative pressure grooves (37); The limiting groove (31) is higher than the inner wall of the NdFeB Halbach structure product (1) and is provided with a strip-shaped inflatable bag (4). The inflatable bag (4) is arranged along the length direction of the inner wall of the limiting groove (31). The inflatable bag (4) is interconnected with the air outlet (33), and a plurality of through holes (41) are opened on the inflatable bag (4); The limiting groove (31) is higher than the inner wall of the NdFeB Halbach structural product (1), and a strip-shaped receiving groove (38) is provided. The air outlet (33) is located on the inner wall of the receiving groove (38), and the inflatable bag (4) is arranged in the receiving groove (38); After the inflatable bag (4) is filled with gas, the side thereof facing the limiting groove (31) is arc-shaped; The invention also comprises a base (5), wherein the base (5) is provided with a plurality of fixing grooves (51) for accommodating the clamp (3), wherein the fixing grooves (51) cooperate with the outer contour of the clamp (3), wherein the air inlet (34) and the air outlet (36) are both located on the bottom wall of the clamp (3), wherein the bottom wall of the fixing groove (51) is provided with a first pair of interfaces (52) interconnected with the air inlet (34), and a second pair of interfaces (53) interconnected with the air outlet (36), wherein the side wall of the base (5) is provided with a third pair of interfaces (54) interconnected with the first pair of interfaces (52), wherein the side wall of the base (5) is provided with a fourth pair of interfaces (55) interconnected with the second pair of interfaces (53), wherein the third pair of interfaces (54) is connected to an inert gas, and the fourth pair of interfaces (55) is used to be connected to the vacuum pump.

2. The NdFeB Halbach structural product welding device according to claim 1, characterized in that: A first magnet (6) is embedded on the bottom wall of the fixing groove (51), and a second magnet (7) that is magnetically attracted to the first magnet (6) is embedded on the bottom wall of the clamp (3).

3. The NdFeB Halbach structural product welding device according to claim 1, characterized in that: A notch (32) is formed at each of the four corners of the limiting groove (31) in a direction away from the center of the limiting groove (31).

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