Double-sided bipolar magnetizing device

Abstract

The utility model discloses a double-sided bipolar magnetizing device. The double-sided bipolar magnetizing device comprises a clamp, a magnetizing coil and a product positioning plate, a product positioning plate which is horizontally arranged is fixed between the two clamps which are buckled up and down, and the two clamps are symmetrically arranged up and down relative to the product positioning plate and are fixed through a positioning pin; working grooves are formed in the surfaces of the opposite inner sides of the two clamps respectively, a positioning channel formed by oppositely arranging two fixing plates perpendicular to the bottom faces of the working grooves is arranged in each working groove, and the peripheries of the two fixing plates are wrapped with insulating paperboards respectively. A magnetizing coil is arranged in each working groove, each magnetizing coil is clamped in the corresponding positioning channel, one end of each magnetizing coil is connected with a power input line penetrating out of the clamp, and the other end of each magnetizing coil is connected with a power output line penetrating out of the clamp; insulating glue is filled in the working groove and the positioning channel; product positioning holes are formed in the positions, corresponding to the positioning channels, of the plate face of the product positioning plate.

Description

Technical field:

[0001] The utility model relates to the technical field of magnetizing coils, in particular to a double-sided bipolar magnetizing device. Background technology:

[0002] Sintered NdFeB products are simply a kind of magnet. They are called "King of Magnets" due to their excellent magnetic properties. They are generally used in micro motors of consumer electronic products. At present, enameled wire or silk-covered wire is used to make double-sided two-pole magnetizing coils for magnetization. The diameter of the enameled wire or silk-covered wire determines the width of the non-magnetic zone. In order to ensure that the width of the non-magnetic zone in the middle of the magnet does not exceed 0.5mm, only wire with a diameter not exceeding 0.5mm can be used for winding.

[0003] However, the above production method has the following disadvantages: 1. Due to the small diameter of the wire, the magnetizing voltage and the magnetizing current are limited to be not too large. If the magnetizing voltage and the magnetizing current are too high, they will exceed the withstand voltage of the wire and cause damage to the insulation layer of the wire; 2. When the width of the non-magnetic zone of the double-sided dipole magnetizing coil is adjusted to be qualified, the magnetization of the NdFeB product is not saturated, resulting in a low magnetic field strength of the NdFeB product, thereby causing a waste of NdFeB product materials. Utility model content:

[0004] The utility model aims to provide a double-sided bipolar magnetizing device.

[0005] The purpose of the utility model is implemented by the following technical solutions: a double-sided bipolar magnetizing device, which includes a clamp, a magnetizing coil and a product positioning plate; the two clamps are buckled up and down and fixed by a positioning pin, and the horizontally arranged product positioning plate is fixed between the two clamps buckled up and down, and the two clamps are symmetrically arranged about the product positioning plate; working grooves are respectively opened on the surfaces of the inner sides of the two clamps, and a positioning channel formed by two fixing plates perpendicular to the bottom surface of the working groove is arranged in each working groove, and the height of the fixing plate is the same as the depth of the working groove, and insulating paperboard is wrapped around the two fixing plates; the magnetizing coil is arranged in each working groove, and each magnetizing coil is clamped in the corresponding positioning channel, one end of each magnetizing coil is connected to a power input line passing through the clamp, and the other end of each magnetizing coil is connected to a power output line passing through the clamp; insulating glue is filled in the working groove and the positioning channel; a product positioning hole is opened on the plate surface of the product positioning plate at a position corresponding to the positioning channel.

[0006] Preferably, the magnetizing coil is formed by a copper plate vertically clamped in the positioning channel and wound around the corresponding two fixing plates.

[0007] Preferably, the product positioning hole is composed of a connected strip hole and a trapezoidal hole, and the upper base of the trapezoidal hole has the same length as the short side of the strip hole and is connected.

[0008] Preferably, cooling water troughs are respectively opened inside the clamps corresponding to the positions of the working grooves, and each of the cooling water troughs is respectively connected to a water inlet pipeline and a water outlet pipeline passing through the clamps.

[0009] Preferably, the insulating adhesive is epoxy resin adhesive.

[0010] Advantages of the utility model: the utility model magnetizes the NdFeB product through the magnetizing coils in the upper and lower clamps, and can realize double-sided bipolar magnetization. The magnetizing coil is wound with TP2 grade, 0.5mm thick copper plate. When the magnetizing power supply pulse discharges, no matter the voltage and current are adjusted, the width of the non-magnetic zone can be controlled within 0.5mm, which can ensure the magnetic field strength of the product. It is also helpful to adjust the voltage and current of the magnetizing power supply for saturation testing. There is no need to perform repeated tests to balance the non-magnetic zone in the middle of the magnetic pole of the NdFeB product, which can extend the service life of the magnetizing coil. Description of the drawings:

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creativity and labor.

[0012] Figure 1 It is a schematic diagram of the structure of the clamp below.

[0013] Figure 2 yes Figure 1 AA section view.

[0014] Figure 3 It is a structural schematic diagram of the product positioning plate installed on the lower fixture.

[0015] Figure 4 It is a schematic diagram of the structure after the two fixtures and the product positioning plate are installed.

[0016] The markings of the components in the accompanying drawings are as follows: clamp 1, working groove 1.1, cooling water trough 1.2, magnetizing coil 2, product positioning plate 3, product positioning hole 3.1, bar hole 3.1.1, trapezoidal hole 3.1.2, positioning pin 4, fixing plate 5, positioning channel 6, insulating cardboard 7, power input line 8, power output line 9, insulating glue 10, water inlet pipeline 11, water outlet pipeline 12. Specific implementation method:

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] like Figure 1-Figure 4 As shown, a double-sided bipolar magnetizing device comprises a fixture 1, a magnetizing coil 2 and a product positioning plate 3; the fixture 1 is used to clamp and fix the product positioning plate 3, the magnetizing coil 2 is arranged inside the fixture 1, the magnetizing coil 2 is used for magnetization, and the product positioning plate 3 is used to position the NdFeB product to be magnetized;

[0019] The two clamps 1 are buckled up and down and fixed by the positioning pin 4. A horizontally arranged product positioning plate 3 is fixed between the two clamps 1 buckled up and down. The two clamps 1 are symmetrically arranged about the product positioning plate 3. Working grooves 1.1 are respectively opened on the surfaces of the inner sides of the two clamps 1. A positioning channel 6 formed by two fixing plates 5 perpendicular to the bottom surface of the working groove 1.1 is arranged on the bottom surface of each working groove 1.1. The height of the fixing plate 5 is the same as the depth of the working groove 1.1. Insulating paperboards 7 are respectively wrapped around the two fixing plates 5. The insulating paperboards 7 can prevent the current from being discharged through the fixing plates 5.

[0020] A magnetizing coil 2 is provided in each working groove 1.1. Each magnetizing coil 2 is wound with a TP2 grade, 0.5 mm thick copper plate. The copper plate has the advantages of low resistance and high conductivity, which can reduce the heating of the magnetizing coil 2. The middle of the copper plate is vertically clamped in the positioning channel 6. The two ends of the copper plate are respectively wound around the corresponding fixing plate 5. One end of the copper plate is connected to a power input line 8 passing through the fixture 1, and the other end of the copper plate is connected to a power output line 9 passing through the fixture 1. The working groove 1.1 and the positioning channel 6 are both filled with insulating glue 10 for sealing. The insulating glue 10 uses epoxy resin glue and has good electrical insulation performance. On the one hand, it can fix the copper plate to avoid short circuit caused by mutual contact of the copper plates. On the other hand, it can avoid contact between the copper plate and the fixture 1 and the product positioning plate 3, thereby avoiding the current from being conducted through the fixture 1 and the product positioning plate 3 to prevent leakage problems.

[0021] A product positioning hole 3.1 is provided on the surface of the product positioning plate 3 at a position corresponding to the positioning channel 6. The product positioning hole 3.1 is composed of a bar hole 3.1.1 and a trapezoidal hole 3.1.2 connected to each other. The upper bottom of the trapezoidal hole 3.1.2 is the same length as the short side of the bar hole 3.1.1 and connected to each other. The bar hole 3.1.1 is used to place NdFeB products. Since the lower bottom of the trapezoidal hole 3.1.2 is longer, it is convenient to push the NdFeB product from the trapezoidal hole 3.1.2 into the bar hole 3.1.1 smoothly, thereby improving the efficiency of loading the NdFeB product into the product positioning hole 3.1.

[0022] A cooling water trough 1.2 is provided inside the fixture 1 corresponding to each working groove 1.1. The cooling water trough 1.2 is not connected to the working groove 1.1. Each cooling water trough 1.2 is connected to a water inlet pipeline 11 and a water outlet pipeline 12 passing through the fixture 1. Cooling water is introduced through the water inlet pipeline 11 to cool the working groove 1.1 of the fixture 1, thereby dissipating the heat of the magnetizing coil 2.

[0023] Installation and use process: First, wrap the insulating paperboard 7 around the two fixing plates 5 in each working groove 1.1 respectively, and place each copper plate vertically between the two insulating paperboards 7 in the corresponding positioning channel 6. The two ends of each copper plate are respectively wound around the corresponding fixing plate 5. One end of each copper plate is connected to the power input line 8 passing through the fixture 1, and the other end of each copper plate is connected to the power output line 9 passing through the fixture 1;

[0024] Second, fill the working groove 1.1 and the positioning channel 6 with epoxy resin glue for sealing, and fix the copper plate at the same time; then, fix the product positioning plate 3 on one of the fixtures 1, and smoothly push the NdFeB product from the trapezoidal hole 3.1.2 into the strip hole 3.1.1, so that the NdFeB product is installed in the product positioning hole 3.1;

[0025] Third, two symmetrical clamps 1 are fastened together to clamp the product positioning plate 3, and fixed by positioning pins 4;

[0026] Fourth, the pulse current flows in through the power input line 8 and flows out through the power output line 9. After the current flows into the copper plate, a magnetic field is formed to magnetize the NdFeB product.

[0027] Fifth, during the magnetization process, since the copper plate has a certain resistance value, the electrical energy will be converted into heat energy when the current passes through it, and the copper plate will dissipate heat. Cooling water is introduced into the cooling water tank 1.2 through the water inlet pipeline 11 to cool the working groove 1.1, thereby cooling the magnetization coil 2.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-sided bipolar magnetizing device, characterized in that: It comprises a fixture, a magnetizing coil and a product positioning plate; the two fixtures are buckled up and down and fixed by a positioning pin, a horizontally arranged product positioning plate is fixed between the two fixtures buckled up and down, and the two fixtures are symmetrically arranged about the product positioning plate; working grooves are respectively opened on the surfaces of the inner sides of the two fixtures, and a positioning channel formed by two fixing plates perpendicular to the bottom surface of the working groove is arranged oppositely in each working groove, the height of the fixing plate is the same as the depth of the working groove, and insulating paperboard is respectively wrapped around the two fixing plates; the magnetizing coil is arranged in each working groove, and each magnetizing coil is clamped in the corresponding positioning channel, one end of each magnetizing coil is connected to a power input line passing through the fixture, and the other end of each magnetizing coil is connected to a power output line passing through the fixture; insulating glue is filled in the working groove and the positioning channel; a product positioning hole is opened on the surface of the product positioning plate at a position corresponding to the positioning channel.

2. A double-sided bipolar magnetizing device according to claim 1, characterized in that: The magnetizing coil is formed by winding a copper plate vertically clamped in the positioning channel along the periphery of the corresponding two fixing plates.

3. A double-sided bipolar magnetizing device according to claim 1 or 2, characterized in that: The product positioning hole is composed of a connected strip hole and a trapezoidal hole, and the upper bottom of the trapezoidal hole has the same length as the short side of the strip hole and is connected.

4. A double-sided bipolar magnetizing device according to claim 3, characterized in that: A cooling water trough is respectively provided inside the clamp corresponding to the position of each working groove, and each cooling water trough is respectively connected to a water inlet pipeline and a water outlet pipeline passing through the clamp.

5. A double-sided bipolar magnetizing device according to claim 1, characterized in that: The insulating glue uses epoxy resin glue.

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