A method for manufacturing a neodymium-iron-boron planar multipole magnetizing pole head

Abstract

The application provides a manufacturing method of a Nd-Fe-B planar multi-pole magnetizing pole head, and relates to the technical field of magnet charging, and solves the technical problem of loose magnetic induction lines emitted by the magnetized magnet in the prior art. The device comprises the following operation steps: step S2: placing a magnetizing part to be magnetized between an upper pole head and a lower pole head, aligning the upper pole head and the lower pole head, and clamping the magnetizing part to be magnetized; step S3: threading the upper pole head and the lower pole head, selecting three adjacent threading holes provided on the upper pole head or the lower pole head, and sequentially threading a copper wire through a first threading hole, a second threading hole, a third threading hole and a second threading hole to form two coils; a gap is provided between the threading hole and a magnetizing surface on the upper pole head or the lower pole head.

Description

Technical Field

[0001] This invention relates to the field of magnetization technology, and in particular to a method for manufacturing a planar multipole magnetizing head for neodymium iron boron magnets. Background Technology

[0002] Currently, the existing winding method of magnetizing poles results in relatively loose magnetic field lines emitted by the magnetized magnet, and relatively weak magnetic pull. Summary of the Invention

[0003] The purpose of this invention is to provide a method for manufacturing a planar multipole magnetizing pole head for neodymium iron boron magnets, thereby solving the technical problem in the prior art where the winding method of the magnetizing pole head results in a relatively loose magnetic field lines emitted by the magnetized magnet. 。 The preferred technical solutions among the many technical solutions provided by this invention can produce a variety of technical effects, which are described in detail below.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] The present invention provides a method for manufacturing a planar multipole magnetizing pole head for neodymium iron boron magnets, comprising the following steps:

[0006] Step S2: First, place the part to be magnetized between the upper and lower poles, then align the upper and lower poles and clamp the part to be magnetized.

[0007] Step S3: Thread the upper electrode and the lower electrode, select three adjacent threading holes on the upper electrode or the lower electrode, and pass the copper wire through the first threading hole, the second threading hole, the third threading hole and the second threading hole in sequence to form two coils;

[0008] A gap is provided between the threading hole and the magnetized surface on the upper or lower electrode.

[0009] Optionally, step S1: Before step S2, the dimensions of the upper electrode and the lower electrode are designed and processed. The specific operations are as follows:

[0010] Step S11: According to the size requirements of the part to be magnetized, set the size of the magnetizing surface, the number of wire holes and the number of turns of copper wire; set the water cooling channel, mounting hole, positioning hole, sealing hole and potting groove;

[0011] Step S12: After drawing the 3D model, put it into the simulation software, set the excitation, and check whether the simulated magnetic field strength meets the actual magnetization requirements and whether the magnetic pull force is increased.

[0012] Step S13: If the simulated magnetic field strength meets the actual magnetization requirements, process the material according to the dimensions of the 3D model drawing to form the upper pole blank and the lower pole blank;

[0013] Step S14: Measure the actual dimensions of the upper electrode blank and the lower electrode blank, check whether there is a difference between the actual dimensions and the drawing dimensions, and check whether there is a deviation between the threading hole on the upper electrode blank and the threading hole on the lower electrode blank when the upper electrode blank and the lower electrode blank are aligned.

[0014] Optionally, in step S15: electroplating epoxy onto the qualified upper electrode blank and the lower electrode blank to form the upper electrode and the lower electrode, and then using a film measuring instrument to measure the coating thickness to check whether the coating thickness is between 10μ and 15μ.

[0015] Optionally, in step S2, the lower electrode head is mounted on a platform of the magnetizing device, the upper electrode head is mounted on a lifting structure of the magnetizing device, the lifting structure pushes the upper electrode head to move closer to or further away from the lower electrode head, the part to be magnetized is placed on a jig of a transverse structure of the magnetizing device, and the transverse structure pushes the part to be magnetized to move between the upper electrode head and the lower electrode head.

[0016] Optionally, in step S3, a straightener is used to straighten the copper wire, and a multimeter is used to check whether the copper wire is damaged.

[0017] Optionally, in step S4: after all copper wires are installed, both ends of the upper electrode and the lower electrode are fixed and sealed with baffles, and the ends of the copper wires are passed through the baffles. Then, epoxy resin is injected into the upper electrode and the lower electrode.

[0018] Optionally, in step S5: after the injected epoxy resin has completely solidified, it is then finely ground using a grinding machine on a machining center.

[0019] Optionally, in step S6: Select a tin-plated copper wire lug, use pressure clamps to make the tin-plated copper wire lug completely adhere to and connect with the copper wire, and then connect the external water pipe to the water cooling channel to introduce circulating water.

[0020] This invention provides a method for manufacturing a planar multi-pole magnetizing head for neodymium iron boron magnets. A copper wire is sequentially passed through a first through-hole, a second through-hole, a third through-hole, and a fourth through-hole to form two coils. When the copper wire is energized, the currents in the two coils are in opposite directions, thus forming two adjacent magnetizing regions with opposite magnetic poles (N and S poles) on the same surface of the magnetized part. The gap between the two magnetizing regions is separated by a non-magnetic area. The coils of the upper and lower poles correspond one-to-one, with the corresponding coils having the same current direction. This results in two opposite magnetic poles forming on the upper and lower surfaces of the magnetized part, leading to a denser magnetic field line emitted after magnetization, increasing magnetic pull. This solves the technical problem in existing magnetizing head winding methods where the magnetic field line emitted by the magnetized magnet is relatively sparse. 。 Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the upper pole head of a method for manufacturing a neodymium iron boron planar multi-pole magnetizing pole head according to an embodiment of the present invention;

[0023] Figure 2 This is a cross-sectional view of the upper pole head of a method for manufacturing a neodymium iron boron planar multi-pole magnetizing pole head according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the lower pole head of a method for manufacturing a neodymium iron boron planar multi-pole magnetizing pole head according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the upper pole head, lower pole head, and magnetized component in a method for manufacturing a planar multi-pole magnetizing pole head for neodymium iron boron provided in an embodiment of the present invention.

[0026] Figure 5 This is a schematic diagram of the winding method of copper wire in a method for manufacturing a neodymium iron boron planar multipole magnetizing pole head provided in an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the magnetic distribution of the component to be magnetized in a method for manufacturing a neodymium iron boron planar multipole magnetizing pole head according to an embodiment of the present invention.

[0028] In the diagram: 1. Upper electrode head; 11. Wire hole; 12. Gap; 13. Magnetizing surface; 14. Water cooling channel; 15. Mounting hole; 16. Positioning hole; 17. Sealing hole; 18. Glue potting groove; 2. Lower electrode head; 3. Copper wire; 4. Component to be magnetized. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0030] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] This invention provides a method for manufacturing a planar multipole magnetizing pole head for neodymium iron boron magnets, comprising the following steps:

[0033] Step S2: First, place the part to be magnetized 4 between the upper pole 1 and the lower pole 2, then align the upper pole 1 and the lower pole 2 and clamp the part to be magnetized 4.

[0034] Step S3: Thread the upper pole 1 and lower pole 2. Select three adjacent threading holes 11 set on the upper pole 1 or lower pole 2, and thread the copper wire 3 through the first threading hole 11, the second threading hole 11, the third threading hole 11 and the second threading hole 11 in sequence to form two coils; the copper wire 3 can be sand-coated copper wire.

[0035] A gap 12 is provided between the wire hole 11 and the magnetizing surface 13 on the upper pole 1 or the lower pole 2. The number of gaps 12 is the same as the number of wire holes 11. The setting of gaps 12 can make the area on the part to be magnetized 4 corresponding to the gap 12 form a non-magnetic area, thereby separating two adjacent magnetizing areas. This invention provides a method for manufacturing a planar multi-pole magnetizing head for neodymium iron boron magnets. A copper wire 3 is sequentially passed through a first through-hole 11, a second through-hole 11, a third through-hole 11, and a fourth through-hole 11, forming two coils. When the copper wire 3 is energized, the current directions of the two coils are opposite, thus forming two adjacent magnetizing regions with opposite magnetic poles, namely N pole and S pole, on the same surface of the magnetized part 4. The gap 12 allows the two adjacent magnetizing regions to be separated by a non-magnetic area. The coils of the upper pole head 1 and the lower pole head 2 correspond one-to-one, with the current directions of the corresponding coils being consistent. This results in two opposite magnetic poles forming on the upper and lower surfaces of the magnetized part 4, leading to a denser magnetic field line emitted by the magnetized part 4 after magnetization, increasing magnetic pull, and solving the technical problem in existing magnetizing head winding methods where the magnetic field line emitted by the magnetized magnet is relatively loose.

[0036] As an optional implementation, step S1: Before step S2, the dimensions of the upper electrode head 1 and the lower electrode head 2 are designed and processed. The specific operation is as follows:

[0037] Step S11: According to the size requirements of the part to be magnetized 4, set the size of the magnetizing surface 13, the number of wire holes 11 and the number of turns of copper wire; set the water cooling channel 14, mounting hole 15, positioning hole 16, sealing hole 17 and potting groove 18; the upper pole head 1 and the lower pole head 2 are made of DT4 pure iron.

[0038] Step S12: After drawing the 3D model, put it into the simulation software, set the excitation, and check whether the simulated magnetic field strength meets the actual magnetization requirements and whether the magnetic pull force is increased.

[0039] Step S13: If the simulated magnetic field strength meets the actual magnetization requirements and the magnetic pull is increased, process the material according to the dimensions of the 3D model drawing to form the upper pole blank and the lower pole blank.

[0040] Step S14: A micrometer can be used to measure the actual dimensions of the upper and lower pole blanks. Check if there is a difference between the actual dimensions and the dimensions on the drawing. The difference should be within ±0.02mm. When the upper and lower pole blanks are aligned, check if there is a deviation between the threading hole 11 on the upper pole blank and the threading hole 11 on the lower pole blank. If there is no deviation, proceed to the next step.

[0041] As an optional implementation, step S15: electroplating epoxy onto the qualified upper electrode blank to form upper electrode 1 and lower electrode 2, ensuring that the exterior of upper electrode 1 and lower electrode 2 and the wiring part are in an insulating state, and then using a film measuring instrument to measure the coating thickness to check whether the coating thickness is between 10μ and 15μ. If the coating thickness meets the requirements, proceed to the next step.

[0042] As an optional implementation, in step S2, the lower electrode head 2 is installed on the platform of the magnetizing device, that is, the mounting hole 15 on the lower electrode head 2 is connected to the platform, and the upper electrode head 1 is installed on the lifting structure of the magnetizing device, that is, the mounting hole 15 on the upper electrode head 1 is connected to the lifting structure. The lifting structure pushes the upper electrode head 1 to move closer to or further away from the lower electrode head 2. The part to be magnetized 4 is placed on the jig of the transverse structure of the magnetizing device, and the transverse structure pushes the part to be magnetized 4 to move between the upper electrode head 1 and the lower electrode head 2.

[0043] As an optional implementation, in step S3, a straightener is used to straighten the copper wire 3 to ensure that the copper wire 3 has no obvious bends. It is then inserted into the upper electrode 1 or the lower electrode 2 and fixed with glue. The wear of the outer layer of the copper wire 3 is constantly observed. A multimeter is used to check whether the copper wire 3 is damaged. The multimeter is adjusted to the continuity knob, one end is connected to a 16mm tin-plated copper wire, and the other end touches various parts of the upper electrode 1 or the lower electrode 2. The insulating plating is then ground off with a file to expose the DT4 pure iron, so that the other end touches the DT4 pure iron position.

[0044] As an optional implementation, in step S4: after all copper wires 3 are installed, both ends of the upper electrode 1 and the lower electrode 2 are fixed and sealed with baffles. The baffles are used to block the glue filling groove 18 and are fixed to the sealing hole 17 with bolts. At the same time, glue is used to bond the edges and the wire outlet to ensure that no glue leakage or overflow occurs after the epoxy resin is mixed and poured in. Then, the wire end of the copper wire 3 is passed through the baffle, and epoxy resin is poured into the upper electrode 1 and the lower electrode 2.

[0045] As an optional implementation, step S5: After the injected epoxy resin has completely solidified, it is then finely ground using a grinding machine on a machining center. During fine grinding, the lower surface is ground first as a reference, and then the upper surface is leveled. The flatness of the upper electrode head 1 or the lower electrode head 2 is measured using special equipment and must be within 5μ.

[0046] As an optional implementation, step S6: Select a 16-square-inch tinned copper wire lug, and use pressure pliers to completely adhere and connect the tinned copper wire lug to the copper wire 3. First, press the rear end, then the front end. Then connect the external water pipe to the water cooling channel 14 and introduce circulating water. When connecting to water cooling, the water cooling channel 14 has three openings: a through-hole, an inlet, and an outlet. First, use a plug to block the through-hole. Connect the inlet and outlet directly. First, ventilate to check for air leaks. If no leaks are found, water can be introduced normally.

[0047] Both the upper electrode head 1 and the lower electrode head 2 have five wire-passing holes 11. The number of turns of the copper wire is two. The copper wire is wound as follows: first, a copper wire is passed through the first wire-passing hole 11, the second wire-passing hole 11, the third wire-passing hole 11, and the second wire-passing hole 11 in sequence. Then, another copper wire is used to repeat the above operation to form two turns. Then, a copper wire is taken and passed through the third wire-passing hole 11, the fourth wire-passing hole 11, the fifth wire-passing hole 11, and the fourth wire-passing hole 11 in sequence. Then, another copper wire is used to repeat the above operation to form two turns.

[0048] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for making a Nd-Fe-B planar multipole magnetizing pole head, characterized in that, The following steps are included: Step S2: First, place the magnet to be charged (4) between the upper pole (1) and the lower pole (2), then align the upper pole (1) and the lower pole (2) and clamp the magnet to be charged (4); Step S3: Thread the upper electrode (1) and the lower electrode (2) by selecting three adjacent threading holes (11) on the upper electrode (1) or the lower electrode (2) and threading the copper wire (3) through the first threading hole (11), the second threading hole (11), the third threading hole (11) and the second threading hole (11) in sequence to form two coils; A gap (12) is provided between the threading hole (11) and the magnetized surface (13) on the upper pole (1) or the lower pole (2).

2. The method for manufacturing a planar multi-pole magnetizing pole head for NdFeB magnets according to claim 1, characterized in that, Step S1: Before step S2, the dimensions of the upper electrode head (1) and the lower electrode head (2) are designed and processed. The specific operation is as follows: Step S11: According to the size requirements of the magnetized part (4), set the size of the magnetized surface (13), the number of the wire holes (11) and the number of turns of the copper wire; set the water cooling channel (14), mounting hole (15), positioning hole (16), sealing hole (17) and potting groove (18); Step S12: After drawing the 3D model, put it into the simulation software, set the excitation, and check whether the simulated magnetic field strength meets the actual magnetization requirements and whether the magnetic pull force is increased. Step S13: If the simulated magnetic field strength meets the actual magnetization requirements, process the material according to the dimensions of the 3D model drawing to form the upper pole blank and the lower pole blank; Step S14: Measure the actual dimensions of the upper electrode blank and the lower electrode blank, check whether there is a difference between the actual dimensions and the drawing dimensions, and check whether there is a deviation between the threading hole (11) on the upper electrode blank and the threading hole (11) on the lower electrode blank when the upper electrode blank and the lower electrode blank are aligned.

3. The method for manufacturing a planar multi-pole magnetizing pole head for NdFeB magnets according to claim 2, characterized in that, Step S15: Electroplating epoxy treatment is performed on the qualified upper electrode blank to form the upper electrode (1) and the lower electrode (2). Then, the coating thickness is measured using a film measuring instrument to check whether the coating thickness is between 10μm and 15μm.

4. The method for manufacturing a planar multi-pole magnetizing pole head for NdFeB magnets according to claim 1, characterized in that, In step S2, the lower electrode head (2) is installed on the platform of the magnetizing device, the upper electrode head (1) is installed on the lifting structure of the magnetizing device, the lifting structure pushes the upper electrode head (1) to move closer to or away from the lower electrode head (2), the part to be magnetized (4) is placed on the jig of the transverse structure of the magnetizing device, and the transverse structure pushes the part to be magnetized (4) to move between the upper electrode head (1) and the lower electrode head (2).

5. The method for manufacturing a planar multi-pole magnetizing pole head for NdFeB magnets according to claim 1, characterized in that, In step S3, a straightener is used to straighten the copper wire (3) and a multimeter is used to check whether the copper wire (3) is damaged.

6. The method for manufacturing a planar multi-pole magnetizing pole head for NdFeB magnets according to claim 1, characterized in that, Step S4: After all copper wires (3) are installed, fix and seal both ends of the upper electrode (1) and the lower electrode (2) with baffles, and pass the ends of the copper wires (3) through the baffles. Then, inject epoxy resin into the upper electrode (1) and the lower electrode (2).

7. A method for manufacturing a planar multi-pole magnetizing pole head for NdFeB magnets according to claim 6, characterized in that, Step S5: After the injected epoxy resin has completely solidified, use a grinding machine on a machining center for fine grinding.

8. A method for manufacturing a planar multi-pole magnetizing pole head for NdFeB magnets according to claim 7, characterized in that, Step S6: Select a tin-plated copper wire lug, use pressure clamps to make the tin-plated copper wire lug completely adhere to and connect with the copper wire (3), and then connect the external water pipe to the water cooling channel (14) to introduce circulating water.

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