Electric heating magnetizing device

Abstract

The utility model discloses an electric heating magnetizing device which comprises a body, the body comprises a feeding assembly (1), a magnetizing assembly (2), a heating assembly (3) and a cooling assembly (4), the magnetizing assembly (2) comprises a magnetizing coil (2.1), the feeding assembly (1) feeds a magnet (6) to be magnetized into the magnetizing coil (2.1) along the axis of the magnetizing coil (2.1), the heating assembly (3) comprises a heating coil (3.1), and the cooling assembly (4) comprises a cooling assembly (5). The heating coil (3.1) is used for heating a magnet (6) fed into the magnetizing coil (2.1) before magnetizing, the cooling assembly (4) comprises a cooling coil (4.1), and the cooling coil (4.1) is used for cooling the magnet (6) fed into the magnetizing coil (2.1) after magnetizing. According to the electric heating magnetizing device, the coercive force of a material is reduced, so that saturation magnetizing is carried out on a multi-pole magnet.

Description

Technical Field

[0001] The utility model relates to the field of magnetizing, and specifically relates to an electric heating magnetizing device. Background Art

[0002] With the progress of technology, the requirement for the control precision of magnets is getting higher and higher, resulting in an increasing number of magnetic poles of the magnets. However, for relatively small-sized magnets, a large number of magnetic poles are likely to cause the situation where magnetization cannot reach saturation. For example, for a magnet with a diameter of 40 mm, it is required to be magnetized to 64 poles, and the pole width of each pole is less than 2 mm. When the coercivity of the material is greater than 4 kA / m under such a small pole width, during magnetization, since the pole head is already saturated, no matter how large the magnetization current is applied, the magnetization saturation of a single magnetic pole cannot be achieved. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide an electric heating magnetizing device that can achieve saturated magnetization of a multi-pole magnet by reducing the coercivity of the material.

[0004] The technical solution adopted by the utility model to solve the above problems is: an electric heating magnetizing device, including a main body, the main body includes a feeding component, a magnetizing component, a heating component and a cooling component, the magnetizing component includes a magnetizing coil, the feeding component feeds the magnet to be magnetized into the interior of the magnetizing coil along the axis of the magnetizing coil, the heating component includes a heating coil, the heating coil is used for heating the magnet fed into the interior of the magnetizing coil before magnetization, and the cooling component includes a cooling coil, the cooling coil is used for cooling the magnet fed into the interior of the magnetizing coil after magnetization.

[0005] Compared with the prior art, the advantages of the utility model are as follows: before multi-pole magnetization, the magnet is first heated by the heating coil to reduce the coercivity of the magnet, and then the magnet is magnetized with multiple poles by the magnetizing coil. At this time, because the coercivity decreases, more magnetization can be carried out within each magnetic pole. When the magnet returns to room temperature, the purpose of saturated magnetization of the magnet is achieved. The design of the cooling coil can cool the magnetized magnet, so that the magnet quickly returns to room temperature to improve the magnetization efficiency of the magnet.

[0006] As an improvement of the present utility model, the heating coil is disposed inside the magnetizing coil, and the heating coil and the magnetizing coil are coaxially arranged. The cooling coil is disposed outside the magnetizing coil, and the cooling coil and the magnetizing coil are coaxially arranged. Through this improvement, the heating coil is disposed inside the magnetizing coil and closer to the magnet, enabling better control accuracy in heating the magnet, avoiding the situation where the heating temperature of the magnet is insufficient, the coercivity is not weakened sufficiently, and the magnet still does not reach the saturation magnetization standard. The function of the cooling coil is only to accelerate the cooling efficiency of the magnet and has little impact on the production quality of the magnet, so it is disposed outside the magnetizing coil. The heating coil, the cooling coil, and the magnetizing coil are all coaxially arranged to ensure the overall synchronization of the magnet during heating and cooling, avoiding temperature differences in the magnet. Especially in the heating state, temperature differences will cause differences in the weakened coercivity, affecting the magnetization quality.

[0007] As an improvement of the present utility model, the heating coil is made of non-magnetic steel material, and the cooling coil is made of high-temperature resistant water pipes. Through this improvement, the heating coil is made of non-magnetic steel material to avoid magnetization of the heating coil and to prevent the heating coil from forming a magnetic shield between the magnet and the magnetizing coil, affecting magnetization. The cooling coil is made of high-temperature resistant water pipes because the water cooling system is simple to manufacture and has low cost.

[0008] As an improvement of the present utility model, the body further includes a frame box, which is made of non-magnetic steel material. The frame box includes a protective shell disposed on the outermost layer, a magnetizing layer shell for the magnetizing coil to be wound with a fixed diameter, a heating layer installation groove for fixedly installing the heating coil, and an axis hole for the magnet to move is provided on the axis of the frame box. Through this improvement, the design of the protective shell realizes the protection of the cooling coil, the magnetizing coil, and the heating coil, avoiding deformation and affecting the use quality. The design of the magnetizing layer shell realizes the positioning of the installation of the magnetizing coil, and the design of the heating layer installation groove realizes the positioning of the installation of the heating coil, thus better ensuring the coaxiality of the magnetizing coil and the heating coil, ensuring the magnetization quality of the magnetizing coil for the magnet on the axis and the heating quality of the heating coil for the magnet on the axis. The frame box is made of non-magnetic steel material to avoid causing magnetization interference to the magnetizing coil.

[0009] As an improvement of the present utility model, the feeding assembly includes a feeding head for fixing the magnet. The feeding head is fixedly connected to a feeding cylinder. The magnet to be magnetized is fed into the heating coil by the feeding cylinder for heating, magnetizing, and cooling, and then the magnetized magnet is removed from the magnetizing coil and discharged. Through this improvement, after the magnet is installed on the feeding head, feeding by the feeding cylinder can ensure that the magnet moves along the axis of the magnetizing coil, thereby ensuring the heating quality, magnetizing quality, and cooling quality.

[0010] As an improvement of the present utility model, the feeding head is made of non-magnetic steel. A material cavity for placing the magnet is provided on the feeding head. A non-magnetic elastic sheet for fixing the magnet in the material cavity is provided at one end of the material cavity. Through this improvement, the feeding head is made of non-magnetic steel to avoid interference of the feeding head with the magnetizing quality of the magnetizing coil, and the design of the material cavity and the non-magnetic elastic sheet can realize the fixed installation of the magnet in the material cavity.

[0011] As an improvement of the present utility model, a material opening for the magnet to enter and exit the material cavity is provided on one side of the material cavity. An anti-detachment section is provided at the end of the material cavity far from the non-magnetic elastic sheet. After the magnet enters the material cavity from the material opening, it moves towards the anti-detachment section under the action of the non-magnetic elastic sheet. Through this improvement, the installation and fixation of the magnet in the material cavity are realized, and it is ensured that the magnet will not detach from the material cavity.

[0012] As an improvement of the present utility model, the non-magnetic elastic sheet is provided at one end of the material cavity close to the feeding cylinder. An ejection slot is provided at the end of the feeding head far from the non-magnetic elastic sheet. The ejection slot is arranged along the direction of the material opening for the magnet to enter and exit the material cavity. Through this improvement, the magnet can be ejected from the material cavity along the ejection slot by a thimble.

[0013] As an improvement of the present utility model, the length of the magnetizing coil is longer than the length of the magnet. Through this improvement, the uniformity of the magnetic field around the magnet in the magnetizing coil is ensured, thereby ensuring the magnetizing quality. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0015] Figure 2 It is a schematic diagram of the connection structure in a top view inside the frame box of the present utility model.

[0016] Figure 3 It is a schematic diagram of the structure of the feeding head of the present utility model.

[0017] Figure 4 It is a schematic cross-sectional view of the feeding head of the present utility model.

[0018] Figure 5 It is a schematic cross-sectional view inside the frame box during magnetizing of the present utility model.

[0019] As shown in the figure: 1. Feeding component, 1.1 Feeding head, 1.1.1 Material cavity, 1.1.1.1 Anti - detachment section, 1.1.2 Non - magnetic elastic sheet, 1.1.3 Material port, 1.1.4 Discharge chute, 1.2 Feeding cylinder, 2. Magnetizing component, 2.1 Magnetizing coil, 2.2 Magnetizing power supply, 3. Heating component, 3.1 Heating coil, 3.2 Heating power supply, 4. Cooling component, 4.1 Cooling coil, 4.2 Cooling water tower, 5. Frame box, 5.1 Protection housing, 5.2 Magnetizing layer housing, 5.3 Installation groove, 5.4 Axis hole, 6. Magnet, 7. Fixed axis ring. Specific embodiments

[0020] The embodiments of the present utility model will be further described below with reference to the accompanying drawings.

[0021] As Figure 1 shown, an electric heating and magnetizing device includes a body. The body includes a feeding component 1, a magnetizing component 2, a heating component 3 and a cooling component 4. The magnetizing component 2 includes a magnetizing coil 2.1. The feeding component 1 feeds a magnet 6 to be magnetized into the interior of the magnetizing coil 2.1 along the axis of the magnetizing coil 2.1. The heating component 3 includes a heating coil 3.1. The heating coil 3.1 is used to heat the magnet 6 fed into the interior of the magnetizing coil 2.1 before magnetizing. The cooling component 4 includes a cooling coil 4.1. The cooling coil 4.1 is used to cool the magnet 6 fed into the interior of the magnetizing coil 2.1 after magnetizing.

[0022] The magnetizing component 2 further includes a magnetizing power supply 2.2 that supplies power to the magnetizing coil 2.1. By controlling the magnetizing power supply 2.2, multi - pole magnetization of the magnet 6 by the magnetizing coil 2.1 can be achieved. This magnetizing method belongs to conventional technology. The heating component 3 further includes a heating power supply 3.2 that supplies power to the heating coil 3.1. The cooling component 4 further includes a cooling water tower 4.2 that supplies cooling water to the cooling coil 4.1. The cooling coil 4.1 is made of high - temperature resistant water pipes.

[0023] As Figure 2 shown, the heating coil 3.1 is arranged inside the magnetizing coil 2.1, and the heating coil 3.1 is coaxially arranged with the magnetizing coil 2.1. The cooling coil 4.1 is arranged outside the magnetizing coil 2.1, and the cooling coil 4.1 is coaxially arranged with the magnetizing coil 2.1. The heating coil 3.1 is made of non - magnetic steel material.

[0024] The body further includes a frame box 5 made of non-magnetic steel. The frame box 5 includes a protective housing 5.1 provided on the outermost layer, a magnetizing layer housing 5.2 for the magnetizing coil 2.1 to wind with a fixed diameter, a heating layer mounting groove 5.3 for fixedly installing the heating coil 3.1, and an axis hole 5.4 for the magnet 6 to move is provided on the axis of the frame box 5. The axis of the frame box 5 is arranged in the vertical direction.

[0025] As Figure 1 , 2 shown, the cooling water pipe between the cooling coil 4.1 and the cooling water tower 4.2 is directly connected through the protective housing 5.1. The magnetizing coil 2.1 and the magnetizing power supply 2.2 are also directly connected through the electrical connection wire passing through the protective housing 5.1. The electrical connection wire between the heating power supply 3.2 and the heating coil 3.1 is inserted from the bottom of the frame box 5 for connection.

[0026] As Figure 1 , Figure 3 , Figure 4 shown, the feeding assembly 1 includes a feeding head 1.1 for fixing the magnet 6. The feeding head 1.1 is fixedly connected to a feeding cylinder 1.2. The feeding cylinder 1.2 is arranged directly above the axis of the frame box 5 through a bracket. The magnet 6 to be magnetized is sent into the heating coil 3.1 by the feeding cylinder 1.2 for heating, magnetizing, and cooling, and then the magnet 6 after magnetization is moved out of the magnetizing coil 2.1 and discharged. The feeding head 1.1 is made of non-magnetic steel. A material cavity 1.1.1 for placing the magnet 6 is provided on the feeding head 1.1. A non-magnetic elastic piece 1.1.2 for fixing the magnet 6 in the material cavity 1.1.1 is provided at one end of the material cavity 1.1.1. A material port 1.1.3 for the magnet 6 to enter and exit the material cavity 1.1.1 is provided on one side of the material cavity 1.1.1. An anti-detachment section 1.1.1.1 is provided at the end of the material cavity 1.1.1 away from the non-magnetic elastic piece 1.1.2. The magnet 6 moves towards the anti-detachment section 1.1.1.1 under the action of the non-magnetic elastic piece 1.1.2 after entering the material cavity 1.1.1 from the material port 1.1.3. The non-magnetic elastic piece 1.1.2 is arranged at one end of the material cavity 1.1.1 close to the feeding cylinder 1.2. An outlet groove 1.1.4 is provided at the end of the feeding head 1.1 away from the non-magnetic elastic piece 1.1.2. The outlet groove 1.1.4 is arranged along the direction of the material port 1.1.3 for the magnet 6 to enter and exit the material cavity 1.1.1.

[0027] As Figure 5As shown, the length of the magnetizing coil 2.1 is longer than that of the magnet 6. To prevent a large amount of heat from the heating coil 3.1 from being transferred towards the magnetizing coil 2.1, the installation groove 5.3 is separated from the magnetizing layer housing 5.2. At the same time, to ensure the coaxiality between the installation groove 5.3 and the magnetizing layer housing 5.2, a fixed-axis ring 7 is provided between the installation groove 5.3 and the magnetizing layer housing 5.2, and the fixed-axis ring 7 is made of a heat-insulating material.

[0028] Through the design of the electric heating magnetizing device, multi-pole saturation magnetization can be performed on small-sized magnets 6, thus better meeting the market usage requirements, and its structure is very simple and the cost is low.

[0029] Table 1 Comparison data of conventional magnetization M1 and high-temperature magnetization M2:

[0030]

[0031]

[0032] The first column in Table 1 is the magnet with a saturation magnetization magnetic moment of M0. The second column is the magnetic moment M1 obtained after demagnetizing the magnet and then remagnetizing it using the normal-temperature magnetization method. The third column is the magnetic moment M2 obtained after demagnetizing the magnet again and then magnetizing it using the device of this patent. The magnetizing coils used in this experiment have the same parameters and the same magnetizing energy is maintained. It can be seen from the experimental data in Table 1 that the magnetic moment M2 obtained by high-temperature magnetization is higher than the magnetic moment M1 obtained by normal-temperature magnetization, which reflects the superiority of this device in multi-pole saturation magnetization.

[0033] The above is only an illustration of the best embodiment of the present utility model, but it should not be construed as a limitation to the claims. The present utility model is not limited to the above embodiments, and its specific structure allows for variations. All variations made within the protection scope of the independent claims of the present utility model are within the protection scope of the present utility model.

Claims

1. An electric heating magnetizing device, comprising a body, characterized in that: The main body comprises a feeding component (1), a magnetizing component (2), a heating component (3) and a cooling component (4); the magnetizing component (2) comprises a magnetizing coil (2.1); the feeding component (1) feeds a magnet (6) to be magnetized into the interior of the magnetizing coil (2.1) along the axis of the magnetizing coil (2.1); the heating component (3) comprises a heating coil (3.1); the heating coil (3.1) is used to heat the magnet (6) fed into the magnetizing coil (2.1) before magnetization; the cooling component (4) comprises a cooling coil (4.1); the cooling coil (4.1) is used to cool the magnet (6) fed into the magnetizing coil (2.1) after magnetization.

2. The electric heating magnetizing device according to claim 1, characterized in that: The heating coil (3.1) is arranged inside the magnetizing coil (2.1), and the heating coil (3.1) and the magnetizing coil (2.1) are arranged coaxially; the cooling coil (4.1) is arranged outside the magnetizing coil (2.1), and the cooling coil (4.1) and the magnetizing coil (2.1) are arranged coaxially.

3. The electric heating magnetizing device according to claim 2, characterized in that: The heating coil (3.1) is made of non-magnetic steel material, and the cooling coil (4.1) is made of high-temperature resistant water pipe.

4. The electric heating magnetizing device according to claim 3, characterized in that: The body also includes a frame box (5), the frame box (5) is made of non-magnetic steel material, the frame box (5) includes a protective shell (5.1) arranged on the outermost layer, a magnetizing layer shell (5.2) for winding the magnetizing coil (2.1) with a fixed diameter, and a heating layer installation groove (5.3) for fixing the heating coil (3.1), and an axis hole (5.4) for moving the magnet (6) is provided on the axis of the frame box (5).

5. The electric heating magnetizing device according to claim 2, characterized in that: The feeding assembly (1) comprises a feeding head (1.1) for fixing a magnet (6), wherein the feeding head (1.1) is fixedly connected to a feeding cylinder (1.2), and the magnet (6) to be magnetized is fed into the interior of a heating coil (3.1) through the feeding cylinder (1.2) for heating, magnetization, and cooling, and then the magnetized magnet (6) is removed from the magnetization coil (2.1) and unloaded.

6. The electric heating magnetizing device according to claim 5, characterized in that: The feeding head (1.1) is made of non-magnetic steel, and is provided with a material cavity (1.1.1) for accommodating a magnet (6), and one end of the material cavity (1.1.1) is provided with a non-magnetic spring piece (1.1.2) for fixing the magnet (6) in the material cavity (1.1.1).

7. An electric heating magnetizing device according to claim 6, characterized in that: A material port (1.1.3) for allowing a magnet to enter and exit the material cavity (1.1.1) is provided on one side of the material cavity (1.1.1); an anti-slip section (1.1.1.1) is provided at one end of the material cavity (1.1.1) away from the non-magnetic spring sheet (1.1.2); after the magnet (6) enters the material cavity (1.1.1) from the material port (1.1.3), it moves in the direction of the anti-slip section (1.1.1.1) under the action of the non-magnetic spring sheet (1.1.2).

8. An electric heating magnetizing device according to claim 7, characterized in that: The non-magnetic spring piece (1.1.2) is arranged at one end of the material cavity (1.1.1) close to the feeding cylinder (1.2), and an end of the feeding head (1.1) away from the non-magnetic spring piece (1.1.2) is provided with a discharge trough (1.1.4), and the discharge trough (1.1.4) is arranged along the direction of the material port (1.1.3) entering and discharging the material cavity (1.1.1).

9. The electric heating magnetizing device according to claim 1, characterized in that: The length of the magnetizing coil (2.1) is longer than the length of the magnet (6).

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