Amorphous iron core and preparation method thereof, motor and vehicle

Abstract

The invention provides an amorphous iron core and a preparation method thereof, a motor and a vehicle, a composite amorphous alloy belt comprises multiple layers of amorphous alloy belts, bonding liquid is arranged between every two adjacent layers of amorphous alloy belts, the bonding liquid is used for adsorbing and bonding the two adjacent layers of amorphous alloy belts, and in the process of punching the composite amorphous alloy belts to obtain a punching sheet, the bonding liquid is used for bonding the two adjacent layers of amorphous alloy belts. Instability phenomena such as layer staggering and slippage are not prone to occurring between the amorphous alloy belts, and the stamping effect is improved; besides, the adsorption effect is adopted to replace the chemical curing effect to enable the layers of the multi-layer amorphous alloy belt to be combined together, curing treatment does not need to be carried out on the composite amorphous alloy belt before stamping, the influence of curing shrinkage stress on the amorphous alloy belt can be reduced, and introduction of stress is reduced. Therefore, according to the preparation method of the amorphous iron core, introduction of stress can be reduced, phase change or crystallization, caused by the stress, of the amorphous alloy belt can be improved, then the iron loss of the amorphous iron core is reduced, and the comprehensive performance of the amorphous iron core is improved.

Description

Technical Field

[0001] The present application belongs to the field of motor technology, and in particular relates to an amorphous iron core and a preparation method thereof, a motor and a vehicle. Background Art

[0002] Amorphous alloy materials have excellent electromagnetic properties and are widely used in the motor industry. In related technologies, when stamping motors, the amorphous alloys are difficult to stamp due to their thin, brittle, and hard physical properties. To reduce the difficulty of stamping amorphous alloys, it is generally necessary to first coat and cure the multilayer amorphous strips with glue before stamping to obtain a composite amorphous strip. The composite amorphous strips are then stamped to obtain punched sheets. Finally, the punched sheets are laminated, impregnated, or coated with glue. The entire process requires two glue curing steps, which can easily introduce excessive stress and cause product performance degradation, requiring further improvement. Summary of the Invention

[0003] The embodiments of the present application provide an amorphous iron core and a preparation method thereof, a motor and a vehicle, aiming to solve the aforementioned technical problems.

[0004] In a first aspect, an embodiment of the present application provides a method for preparing an amorphous iron core, comprising the following steps:

[0005] A composite amorphous alloy ribbon is provided, wherein the composite amorphous alloy ribbon comprises multiple layers of amorphous alloy ribbons, wherein an adhesive liquid is provided between two adjacent layers of the amorphous alloy ribbons, and the adhesive liquid is used for adsorption and bonding the two adjacent layers of the amorphous alloy ribbons;

[0006] Punching the composite amorphous alloy strip to obtain a punched sheet;

[0007] The punching sheet is cured by using glue to obtain the amorphous iron core.

[0008] In one embodiment, the method for preparing the composite multi-layer amorphous alloy ribbon comprises the following steps:

[0009] A spraying process is used to form an adhesive liquid layer between the layers of the multi-layer amorphous alloy ribbon to obtain the composite multi-layer amorphous alloy ribbon, wherein the adhesive liquid layer enables electrostatic adsorption to be formed between two adjacent layers of the amorphous alloy ribbon.

[0010] In one embodiment, after the step of forming an adhesive liquid layer between the layers of the multi-layer amorphous alloy ribbon using a spraying process, the method further includes:

[0011] The multi-layer amorphous alloy ribbon containing the adhesive liquid layer is subjected to a pressing process and a tension control process to adjust the thickness of the adhesive liquid layer to 2 μm-4 μm.

[0012] In one embodiment, the viscosity of the adhesive at room temperature is 15 mm 2 / s-320mm 2 / s; and / or

[0013] The bonding liquid includes anti-rust oil; and / or

[0014] In the composite amorphous alloy ribbon, the bonding strength between the layers of the amorphous alloy ribbon is 0.006N / mm-0.01N / mm; and / or the servo-controlled feeding mechanism

[0015] The number of layers of the multi-layer amorphous alloy ribbon is 2 to 10; and / or

[0016] The thickness of each layer of the amorphous alloy strip is 0.025 mm to 0.03 mm.

[0017] In one embodiment, the step of punching the composite amorphous alloy strip to obtain a punched sheet specifically includes:

[0018] performing a deviation correction process on the composite amorphous alloy ribbon so that each layer of the amorphous alloy ribbon is on the same track;

[0019] The composite amorphous alloy strip that has undergone the deviation correction process is transported to a stamping die, and the stamping die performs a stamping process on the composite amorphous alloy strip to obtain the punched sheet.

[0020] In one embodiment, the stamping die performing stamping processing on the composite amorphous alloy strip further comprises:

[0021] A blowing mechanism is used to blow the stamping die to remove debris on the stamping die.

[0022] In one embodiment, the method for preparing the amorphous iron core further comprises: rolling the stamped multi-layer amorphous alloy strip.

[0023] In one embodiment, the step of curing the punched sheet with glue specifically includes:

[0024] The punching sheets are stacked and compacted to obtain laminated punching sheets;

[0025] impregnating the laminated sheets with a glue solution to obtain laminated sheets containing the glue solution;

[0026] The laminated punching sheets after the impregnation treatment are pressed and the glue is solidified to obtain the amorphous iron core.

[0027] In one embodiment, the material of the glue includes one or more of epoxy resin water, polyurethane, and acrylic compound; and / or

[0028] The curing time is 3h-5h; and / or

[0029] The curing temperature is 150°C-200°C.

[0030] In a second aspect, an embodiment of the present application further provides an amorphous iron core, which is prepared using the preparation method described above.

[0031] In a third aspect, an embodiment of the present application further provides a motor, comprising the amorphous iron core as described above or an amorphous iron core prepared using the preparation method as described above.

[0032] In a fourth aspect, an embodiment of the present application further provides a vehicle, comprising the amorphous iron core as described above or an amorphous iron core prepared using the preparation method as described above, or comprising the motor as described above.

[0033] Beneficial effects of the embodiments of the present application:

[0034] In an embodiment of the present application, the composite amorphous alloy strip includes a multilayer amorphous alloy strip, wherein an adhesive liquid is provided between two adjacent layers of amorphous alloy strips, and the adhesive liquid is used to adsorb and bond the two adjacent layers of amorphous alloy strips. In the process of punching the composite amorphous alloy strip to obtain a punched sheet, it is not easy for the amorphous alloy strips to have instability phenomena such as staggered layers and slippage, thereby improving the punching effect. In addition, adsorption is used instead of chemical solidification to combine the layers of the multilayer amorphous alloy strips together. The composite amorphous alloy strip does not need to be solidified before stamping, which can reduce the effect of solidification shrinkage stress on the amorphous alloy strip and reduce the introduction of stress. Therefore, the preparation method of the amorphous iron core of the embodiment of the present application can reduce the introduction of stress, improve the phase change or crystallization of the amorphous alloy strip caused by stress, thereby reducing the brittleness of the amorphous alloy strip and the iron loss of the amorphous iron core, and improving the comprehensive performance of the amorphous iron core. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] To more clearly illustrate the solutions in the present application or the prior art, a brief introduction to the drawings required for use in the embodiments or descriptions of the prior art is provided below. Obviously, the drawings described below are some embodiments of the present application. A person skilled in the art can derive other drawings based on these drawings without inventive effort.

[0036] Figure 1 A flowchart of a method for preparing an amorphous iron core provided in one embodiment of the present application;

[0037] Figure 2 A schematic structural diagram of a stamping device provided in one embodiment of the present application;

[0038] Figure 3The metallographic structure diagram of the amorphous iron core provided in Example 1 of the present application;

[0039] Figure 4 This is the metallographic structure diagram of the amorphous iron core provided in Comparative Example 1 of this application.

[0040] Reference numerals:

[0041] 100. Stamping equipment;

[0042] 1. Stamping die; 11. Rotor collection mechanism; 12. Stator collection mechanism;

[0043] 2. Fuel injection mechanism;

[0044] 3. Rolling mechanism;

[0045] 4. Multi-layer drawing and servo tension control mechanism;

[0046] 5. Servo-controlled feeding mechanism;

[0047] 6. Material rack;

[0048] 7. Winding mechanism. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; and "inside" and "outside" refer to the outline of the device.

[0050] In the related art, when preparing amorphous iron cores, the glue needs to be cured twice, which easily introduces excessive stress and causes product performance to deteriorate, and needs further improvement.

[0051] This application provides a method for preparing an amorphous iron core, referring to Figure 1 , including the following steps:

[0052] S1. Providing a composite amorphous alloy ribbon, wherein the composite amorphous alloy ribbon comprises multiple layers of amorphous alloy ribbons, wherein an adhesive liquid is provided between two adjacent layers of amorphous alloy ribbons, and the adhesive liquid is used for adsorption and bonding the two adjacent layers of amorphous alloy ribbons;

[0053] S2, punching the composite amorphous alloy strip to obtain a punched sheet;

[0054] S3. Use glue to solidify the punching sheet to obtain an amorphous iron core.

[0055] In an embodiment, the composite amorphous alloy strip includes a multilayer amorphous alloy strip, wherein an adhesive liquid is provided between two adjacent layers of amorphous alloy strips, and the adhesive liquid is used to adsorb and bond the two adjacent layers of amorphous alloy strips. In the process of punching the composite amorphous alloy strip to obtain a punched sheet, it is not easy for the amorphous alloy strips to have instability phenomena such as staggered layers and slippage, thereby improving the stamping effect; in addition, adsorption is used instead of chemical curing to combine the layers of the multilayer amorphous alloy strips together. The composite amorphous alloy strip does not need to be cured before stamping, which can reduce the impact of curing shrinkage stress on the amorphous alloy strip, reduce the introduction of stress, improve the phase change or crystallization of the amorphous alloy strip caused by stress, thereby reducing the brittleness of the amorphous alloy strip and the iron loss of the amorphous core, and improving the comprehensive performance of the amorphous core. At the same time, before stamping the composite amorphous alloy strip, there is no need to perform process treatments such as gluing, compounding, and curing, which can save process and processing costs and improve production efficiency.

[0056] In this embodiment, the Figure 2 The stamping equipment shown is used to stamp an amorphous alloy strip. The stamping equipment includes a stamping die 1, which can be a progressive die. The stamping die 1 can sequentially complete multiple processes such as punching, blanking, bending, and trimming. The stampings can be stator stampings, and the amorphous core can be the stator core; alternatively, the stampings can be rotor stampings, and the amorphous core can be the rotor core, without limitation.

[0057] In one embodiment, a method for preparing a composite multilayer amorphous alloy ribbon comprises the following steps:

[0058] A spraying process is used to form an adhesive liquid layer between layers of the multilayer amorphous alloy ribbon to obtain a composite multilayer amorphous alloy ribbon, wherein the adhesive liquid layer enables electrostatic adsorption to be formed between two adjacent layers of the amorphous alloy ribbon.

[0059] In this embodiment, a bonding liquid is used as the raw material, and a spraying process is employed to form a bonding liquid layer between the layers of the multilayer amorphous alloy ribbon. The bonding liquid layer adheres tightly to the surface of the amorphous alloy ribbon through electrostatic attraction, thereby bonding the layers together. Electrostatic attraction is a physical bond that does not require high-temperature treatment, chemical reactions, or phase transitions. This reduces the introduction of stress and facilitates the preservation of the original mechanical properties and crystalline structure of the amorphous alloy. Furthermore, electrostatic attraction allows for dynamic adjustment and disassembly of the relative positions of the layers of the multilayer amorphous alloy ribbon, facilitating the correction and recycling of the amorphous alloy ribbon.

[0060] In one embodiment, after the step of forming an adhesive liquid layer between layers of the multi-layer amorphous alloy ribbon using a spraying process, the method further includes:

[0061] The multi-layer amorphous alloy ribbon containing the adhesive liquid layer is subjected to a pressing process and a tension control process to adjust the thickness of the adhesive liquid layer to 2 μm-4 μm.

[0062] In this embodiment, compacting the multi-layer amorphous alloy ribbon containing the adhesive liquid layer can squeeze out excess adhesive liquid between the layers of the multi-layer amorphous alloy ribbon. At the same time, the adhesive liquid is more evenly distributed between the layers, thereby reducing the deviation of the amorphous alloy ribbon caused by uneven distribution of adhesive liquid between the layers.

[0063] In this embodiment, the thickness of the adhesive layer is adjusted to 2 μm-4 μm to improve the matching between the die gap and the size of the multi-layer amorphous alloy ribbon during the subsequent stamping process, thereby reducing the generation of burrs. Alternatively, the thickness of the adhesive layer can be any one of 2 μm, 2.5 μm, 3 μm, 3.5 μm, 4 μm, or any range between any two thereof, without limitation herein.

[0064] In this embodiment, the type of bonding liquid is not limited. The bonding liquid can be a commercially available low-viscosity rust-proof oil with rust-proof properties. For example, the bonding liquid can include one or more of F20-1 thin-layer rust-proof oil, N320 rust-proof oil, L-RK solvent-diluted rust-proof oil, FY-5 sealed rust-proof oil, and M-2 emulsified rust-proof oil.

[0065] In a specific embodiment, reference Figure 2 , an oil spraying mechanism 2 with two upper and lower nozzles is used to spray the adhesive liquid on the surface of the multi-layer amorphous alloy strip, so that an adhesive liquid layer is formed between the layers of the multi-layer amorphous alloy strip; then a rolling mechanism 3 and a multi-layer pulling and servo tension control mechanism 4 are used to press and control the tension of the multi-layer amorphous alloy strip after spraying, so as to adjust the thickness of the adhesive liquid layer to 2μm-4μm; then the multi-layer amorphous alloy strip is transported to the stamping die through the servo-controlled feeding mechanism 5. Among them, the rolling mechanism 3 can squeeze out the excess bonding liquid between the layers of the multi-layer amorphous alloy strip, so that the bonding liquid is more evenly distributed between the layers, and at the same time the thickness of the bonding layer can be adjusted; the multi-layer drawing and servo tension control mechanism 4 can ensure that the relative position of the multi-layer amorphous alloy strip is not offset due to the difference in the initial coil diameter during the stamping process, and ensure that the tension of each layer of the strip is consistent; the multi-layer drawing and servo tension control mechanism 4 can ensure that the surface of the strip remains flat and no layer misalignment occurs during the process of being conveyed to the stamping die, so that the stamping die and the strip are adapted to complete the stamping.

[0066] In one embodiment, before the step of forming the adhesive liquid layer between the layers of the multi-layer amorphous alloy ribbon by the spraying process, a material discharging operation is further included. The material discharging operation specifically includes:

[0067] S11. providing a multilayer amorphous alloy ribbon;

[0068] S12, winding the multilayer amorphous alloy strip to obtain a coil;

[0069] S13, placing the coiled material on a material unloading rack for unloading.

[0070] In this embodiment, after the coil is placed on the unloading rack 6 for unloading, no tension control is applied to the amorphous alloy strip, so that the unloaded amorphous alloy strip hangs down to a certain arc, which can release the stress introduced during the winding process and operation.

[0071] In one embodiment, the viscosity of the adhesive at room temperature is 15 mm 2 / s-320mm 2 / s. Optionally, the viscosity of the adhesive at room temperature can be 15mm 2 / s、30mm 2 / s、60mm 2 / s、100mm 2 / s、150mm 2 / s、200mm 2 / s、250mm 2 / s、300mm 2 / s、320mm 2 / s, etc., or the range between any two of them is not limited here. In this embodiment, when the viscosity of the adhesive liquid at room temperature is less than 15mm 2 / s, it is easy to cause the bonding force between the layers of the multi-layer amorphous alloy strip to be too weak, and the amorphous alloy strips are prone to staggering, slipping and other instability during the stamping process, affecting the stamping effect. When the viscosity of the adhesive at room temperature is greater than 320mm 2 / s, it is not conducive to the micro-slip between the layers of the amorphous alloy strip during stamping to release local stress, and increases the interlayer shear stress during the stamping process.

[0072] In one embodiment, in the composite amorphous alloy strip, the bonding strength between the layers of the amorphous alloy strip is 0.006N / mm-0.01N / mm. Optionally, the bonding strength between the layers of the amorphous alloy strip can be in the range of any one or any two of 0.006N / mm, 0.007N / mm, 0.008N / mm, 0.009N / mm, 0.01N / mm, etc., and is not limited here. In this embodiment, when the bonding strength between the layers of the amorphous alloy strip is less than 0.006N / mm, it is easy to cause the bonding force between the layers of the multilayer amorphous alloy strip to be too small, and instability such as staggered layers and slippage is likely to occur between the amorphous alloy strips during the stamping process, affecting the stamping effect. When the bonding strength between the layers of the amorphous alloy strip is greater than 0.01 N / mm, it is not conducive to the occurrence of micro-slip between the layers of the amorphous alloy strip during stamping to release local stress, and increases the interlayer shear stress during the stamping process; at the same time, when the composite amorphous alloy strip is corrected, it is not easy to make each layer of the amorphous alloy strip on the same track, which reduces the effect of the correction treatment.

[0073] In this embodiment, a stretching device can be used to pull the layers apart at a specified speed and angle, and a tension sensor can be used to record the force required during the peeling process to obtain the bonding strength between the layers of the amorphous alloy ribbon.

[0074] In one embodiment, the number of layers of the multilayer amorphous alloy ribbon is 2-10 layers. Optionally, the number of layers of the multilayer amorphous alloy ribbon can be any one of 2 layers, 3 layers, 4 layers, 5 layers, 6 layers, 7 layers, 8 layers, 9 layers, 10 layers, etc., or a range between any two of them, and is not limited here. In this embodiment, when the number of layers of the amorphous alloy ribbon is less than 2 layers, the stamping efficiency is likely to be reduced; when the number of layers of the amorphous alloy ribbon is greater than 10 layers, it is likely to cause the composite amorphous alloy ribbon to be too thick, which is likely to aggravate the wear of the stamping die, increase the difficulty of stamping, and be detrimental to production.

[0075] In one embodiment, the thickness of each layer of amorphous alloy ribbon is 0.025 mm to 0.03 mm. Alternatively, the thickness of each layer of amorphous alloy ribbon can be any one of 0.025 mm, 0.026 mm, 0.027 mm, 0.028 mm, 0.030 mm, or any range between two thereof, which is not limited here.

[0076] In one embodiment, the amorphous alloy ribbon includes one or more of an iron-based amorphous alloy ribbon, a cobalt-based amorphous alloy ribbon, a nickel-based amorphous alloy ribbon, a zirconium-based amorphous alloy ribbon, and a precious metal-based amorphous alloy ribbon.

[0077] In one embodiment, step S2 specifically includes:

[0078] S21, performing a deviation correction process on the composite amorphous alloy ribbon so that each layer of the amorphous alloy ribbon is on the same track;

[0079] S22, conveying the composite amorphous alloy strip after the deviation correction process to a stamping die, and the stamping die stamps the composite amorphous alloy strip to obtain a punched sheet.

[0080] In this embodiment, the strip is first corrected before stamping, so that the stamping die and the composite amorphous alloy strip are well aligned, thereby reducing the size deviation of the punching sheet caused by the deviation of the amorphous alloy strip.

[0081] In one embodiment, the stamping process of the composite amorphous alloy strip by the stamping die further includes: using a purge mechanism to purge the stamping die to remove debris on the stamping die.

[0082] Due to the high hardness of the amorphous alloy strip, amorphous alloy debris may be generated after stamping. The weak magnetic properties of the amorphous alloy debris cause it to adhere to the stamping die, resulting in a mismatch between the die gap and the size of the amorphous alloy strip, which can lead to burrs on the punched sheet during subsequent stamping. In this embodiment, a purge mechanism is used to purge the stamping die to remove debris from the stamping die. This can further ensure that the die gap matches the size of the amorphous strip, reduce the generation of burrs, and facilitate smooth stamping.

[0083] In one embodiment, reference Figure 2 The stamping die 1 includes a sheet collecting mechanism and a monitoring mechanism. The sheet collecting mechanism is used to collect the sheets, and the monitoring mechanism is used to detect the number and / or stacking height of the sheets in the sheet collecting mechanism.

[0084] In this embodiment, the stamping die includes a punch collecting mechanism and a monitoring mechanism, which can automatically collect and count the punches as they fall, thereby improving production efficiency.

[0085] In a specific embodiment, reference Figure 2 The collection mechanism includes a rotor collection mechanism 11 and a stator collection mechanism 12, and the monitoring mechanism includes a counter and a thickness gauge. The rotor punchings produced by the stamping die 1 can fall into the rotor collection mechanism 11 and be automatically stacked. When the counter and thickness gauge detect that the number and / or thickness of the rotor punchings in the rotor collection mechanism 11 reaches a preset value, the stacked rotors automatically fall into the receiving mechanism. The stator punchings produced by the stamping die 1 can fall into the stator collection mechanism 12 and be automatically stacked. When the counter and thickness gauge detect that the number and / or thickness of the stator punchings in the stator collection mechanism 12 reaches a preset value, the stacked stators automatically fall into the receiving mechanism.

[0086] In one embodiment, the method for preparing the amorphous iron core further includes: rolling up the stamped multi-layer amorphous alloy strip.

[0087] In this embodiment, reference Figure 2The multi-layer amorphous alloy strip after stamping is wound up to ensure the recovery of the residual material and reduce material waste. Preferably, a winding mechanism 7 can be used to wind up the multi-layer amorphous alloy strip after stamping. The winding mechanism 7 can be provided with a shearing assembly. When the amorphous alloy strip is wound to a certain thickness, the shearing assembly can cut the amorphous alloy strip, facilitating the recovery and subsequent classification of the residual material.

[0088] In one embodiment, step S3 specifically includes:

[0089] S31, stacking and compacting the punches to obtain laminated punches;

[0090] S32, impregnating the laminated sheets with a glue solution to obtain laminated sheets containing the glue solution;

[0091] S33, pressing the laminated punching sheets after the impregnation treatment and solidifying the glue to obtain an amorphous iron core.

[0092] In this embodiment, the punching sheets are laminated and the glue is solidified to ensure that the amorphous iron core has a certain mechanical strength.

[0093] In one embodiment, the material of the glue includes one or more of epoxy resin water, polyurethane, and acrylic compounds.

[0094] In one embodiment, the curing time is 3 hours to 5 hours, and / or the curing temperature is 150° C. to 200° C. In this embodiment, setting the curing time and temperature within the above ranges can further ensure the curing effect of the adhesive.

[0095] The present application also provides an amorphous iron core, which is prepared using the preparation method described above.

[0096] The present application also provides a motor, which includes the amorphous iron core as described above or the amorphous iron core prepared using the preparation method as described above.

[0097] The present application also provides a vehicle, comprising the amorphous iron core described above, or an amorphous iron core prepared using the above-described preparation method, or comprising the above-described motor. In this embodiment, the vehicle may be a gasoline-powered vehicle, a plug-in hybrid vehicle, or a new energy vehicle, and this disclosure does not specifically limit this.

[0098] The present application will be further described below through specific examples.

[0099] Example 1

[0100] A method for preparing an amorphous iron core comprises the following steps:

[0101] (1) Five layers of amorphous alloy strips are stacked to obtain a multi-layer amorphous alloy strip, wherein the thickness of each layer of the amorphous alloy strip is 0.025 mm, and the amorphous alloy strip is an iron-based amorphous alloy strip.

[0102] (2) The multi-layer amorphous alloy strip is wound to obtain a coil, and the coil is placed on a discharge rack for discharge, and no tension control is applied to the amorphous alloy strip after discharge, so that the amorphous alloy strip after discharge falls to a certain arc.

[0103] (3) Using an oil spraying mechanism with two upper and lower nozzles to spray the adhesive liquid on the surface of the multi-layer amorphous alloy strip, so that an adhesive liquid layer is formed between the layers of the multi-layer amorphous alloy strip. The adhesive liquid is a thin layer of F20-1 anti-rust oil, and the viscosity of the adhesive liquid at room temperature is 15mm 2 / s.

[0104] (4) A roller pressing mechanism and a tension control mechanism are used to press and control the tension of the multi-layer amorphous alloy strip after the spraying process to adjust the thickness of the adhesive liquid layer to 3 μm.

[0105] (5) The multi-layer amorphous alloy strip is subjected to a deviation correction process, and then the multi-layer amorphous alloy strip is transported to a stamping die through a servo-controlled feeding mechanism for stamping to obtain a punched sheet; wherein, after each stamping process, the stamping die is purged by a purge mechanism to remove debris on the stamping die.

[0106] (6) The punching sheets are stacked and pressed to obtain laminated punching sheets, and the laminated punching sheets are impregnated with epoxy resin glue to obtain laminated punching sheets containing glue, and the laminated punching sheets after impregnation are pressed and cured to obtain an amorphous iron core, wherein the curing temperature is 180°C and the curing time is 4 hours. The metallographic structure diagram of the amorphous iron core is shown in FIG. Figure 3 As shown, the edge of the amorphous core is smooth and free of black burrs.

[0107] Example 2

[0108] The main difference between Example 2 and Example 1 is that:

[0109] In step (3), the bonding liquid is N320 anti-rust oil, and the viscosity of the bonding liquid at room temperature is 320mm 2 / s; the rest is the same as in Example 1.

[0110] Example 3

[0111] The main difference between Example 3 and Example 1 is that:

[0112] Step (4) is: using a roller pressing mechanism and a tension control mechanism to press and control the tension of the multi-layer amorphous alloy ribbon after the spraying process to adjust the thickness of the adhesive liquid layer to 2 μm;

[0113] The rest is the same as in Example 1.

[0114] Example 4

[0115] The main difference between Example 4 and Example 1 is that:

[0116] Step (4) is: using a roller pressing mechanism and a tension control mechanism to press and control the tension of the multi-layer amorphous alloy ribbon after the spraying process to adjust the thickness of the adhesive liquid layer to 4 μm;

[0117] The rest is the same as in Example 1.

[0118] Example 5

[0119] The main difference between Example 5 and Example 1 is that:

[0120] In step (3), the bonding liquid is N320 anti-rust oil, and the viscosity of the bonding liquid at room temperature is 350mm 2 / s; the rest is the same as in Example 1.

[0121] Example 6

[0122] The main difference between Example 6 and Example 1 is that:

[0123] In step (3), the bonding liquid is F20-1 thin layer anti-rust oil, and the viscosity of the bonding liquid at room temperature is 13mm 2 / s; the rest is the same as in Example 1.

[0124] Example 7

[0125] The main difference between Example 7 and Example 1 is that:

[0126] Step (4) is: using a roller pressing mechanism and a tension control mechanism to press and control the tension of the multi-layer amorphous alloy ribbon after the spraying process to adjust the thickness of the adhesive liquid layer to 1.5 μm;

[0127] The rest is the same as in Example 1.

[0128] Example 8

[0129] The main difference between Example 8 and Example 1 is:

[0130] Step (4) is: using a roller pressing mechanism and a tension control mechanism to press and control the tension of the multi-layer amorphous alloy ribbon after the spraying process to adjust the thickness of the adhesive liquid layer to 8 μm;

[0131] The rest is the same as in Example 1.

[0132] Example 9

[0133] The main difference between Example 9 and Example 1 is that:

[0134] Step (2) is: winding the multi-layer amorphous alloy strip to obtain a coil, placing the coil on a discharge rack for discharge and applying tension control to the amorphous alloy strip after discharge to tighten the amorphous alloy strip after discharge; the rest is the same as Example 1.

[0135] Example 10

[0136] The main difference between Example 10 and Example 1 is that:

[0137] In step (5), after each stamping process, the debris on the stamping die is not removed;

[0138] The rest is the same as in Example 1.

[0139] Comparative Example 1

[0140] The main difference between Comparative Example 1 and Example 1 is:

[0141] The operation of step (3) was not performed;

[0142] The corresponding change of step (4) is: using a rolling mechanism and a tension control mechanism to press and control the tension of the multi-layer amorphous alloy strip;

[0143] The rest is the same as in Example 1;

[0144] The metallographic structure of amorphous iron core is as follows Figure 4 As shown, there are many black burrs on the edge of the amorphous core.

[0145] Comparative Example 2

[0146] (1) Five layers of amorphous alloy strips are stacked to obtain a multi-layer amorphous alloy strip, wherein the thickness of each layer of the amorphous alloy strip is 0.025 mm, and the amorphous alloy strip is an iron-based amorphous alloy strip.

[0147] (2) Epoxy resin glue is coated on the bottom surface of each layer of amorphous alloy strip by using a glue coating device, and the amorphous alloy strip is placed at a temperature of 180°C to cure the glue for 4 hours; the multi-layer amorphous alloy strip after the curing treatment is wound to obtain a coil, and the coil is placed on a discharge rack for discharge, and no tension control is applied to the amorphous alloy strip after discharge, so that the amorphous alloy strip after discharge falls to a certain arc.

[0148] (3) A rolling mechanism and a tension control mechanism are used to compact and control the tension of the multilayer amorphous alloy strip.

[0149] (4) The multi-layer amorphous alloy strip is subjected to a deviation correction process, and then the multi-layer amorphous alloy strip is transported to a stamping die through a servo-controlled feeding mechanism for stamping to obtain a punched sheet; wherein, after each stamping process, the stamping die is purged by a purge mechanism to remove debris on the stamping die.

[0150] (5) The punching sheets are stacked and pressed to obtain laminated punching sheets, and the laminated punching sheets are impregnated with epoxy resin glue to obtain laminated punching sheets containing glue, and the laminated punching sheets after impregnation are pressed and cured to obtain an amorphous iron core, wherein the curing temperature is 180° C. and the curing time is 4 hours.

[0151] Test method:

[0152] (1) Mechanical properties test

[0153] Mechanical properties of the amorphous cores prepared in Examples 1-10 and Comparative Examples 1 and 2 were tested. The test method was in accordance with the standard GB / T 228.1-2010, and the test results are shown in Table 1.

[0154] Table 1

[0155]

[0156]

[0157] (2) Magnetic performance test

[0158] The magnetic properties of the amorphous cores prepared in Examples 1-10 and Comparative Examples 1 and 2 were tested. The testing method was in accordance with standard GB / T 19346.1-2017. The test results are shown in Table 2.

[0159] Table 2

[0160]

[0161] From the test results of the above-mentioned Examples 1 to 10 and Comparative Examples 1-2, it can be seen that the magnetic loss of the amorphous iron cores prepared in Examples 1 to 10 is less than 3.98 W / kg under the test conditions that the peak value of the magnetic induction intensity is 1.0 T and the test frequency is 400 Hz; the magnetic loss of the amorphous iron cores prepared in Examples 1 to 10 is less than 9.08 W / kg under the test conditions that the peak value of the magnetic induction intensity is 1.0 T and the test frequency is 800 Hz; the magnetic loss of the amorphous iron cores prepared in Examples 1 to 10 is less than 11.60 W / kg under the test conditions that the peak value of the magnetic induction intensity is 1.0 T and the test frequency is 1000 Hz; the magnetic loss of the amorphous iron cores prepared in Examples 1 to 10 is less than 11.20 W / kg under the test conditions that the peak value of the magnetic induction intensity is 1.0 T and the test frequency is 2000 Hz. The amorphous iron cores prepared in the embodiments of the present application have relatively less magnetic loss and have better magnetic properties.

[0162] From the comparison between Examples 1-4, Example 5 and Example 6, it can be seen that controlling the viscosity of the adhesive liquid within an appropriate range can improve the mechanical properties of the amorphous core, reduce magnetic loss, and further improve the overall performance of the amorphous core.

[0163] From the comparison between Examples 1-4, Example 7 and Example 8, it can be seen that controlling the thickness of the bonding layer within an appropriate range can improve the mechanical properties of the amorphous core, reduce magnetic loss, and further improve the overall performance of the amorphous core.

[0164] From the comparison between Examples 1-4 and Example 9, it can be seen that placing the coil on the unloading rack for unloading and not applying tension control to the amorphous alloy strip after unloading can reduce the introduction of stress, improve the mechanical properties of the amorphous core, reduce magnetic loss, and further improve the comprehensive performance of the amorphous core.

[0165] From the comparison between Examples 1-4 and Example 10, it can be seen that removing the debris on the stamping die after the stamping process can improve the mechanical properties of the amorphous core, reduce the magnetic loss, and further improve the comprehensive performance of the amorphous core.

[0166] The above is a detailed introduction to the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of the present application. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for preparing an amorphous iron core, characterized in that: The following steps are involved: A composite amorphous alloy ribbon is provided, wherein the composite amorphous alloy ribbon comprises multiple layers of amorphous alloy ribbons, wherein an adhesive liquid is provided between two adjacent layers of the amorphous alloy ribbons, and the adhesive liquid is used for adsorption and bonding the two adjacent layers of the amorphous alloy ribbons; Punching the composite amorphous alloy strip to obtain a punched sheet; The punching sheet is cured by using glue to obtain the amorphous iron core.

2. The method for preparing an amorphous iron core according to claim 1, wherein: The method for preparing the composite multi-layer amorphous alloy ribbon comprises the following steps: A spraying process is used to form an adhesive liquid layer between the layers of the multi-layer amorphous alloy ribbon to obtain the composite multi-layer amorphous alloy ribbon, wherein the adhesive liquid layer enables electrostatic adsorption to be formed between two adjacent layers of the amorphous alloy ribbon.

3. The method for preparing an amorphous iron core according to claim 2, wherein: After the step of forming an adhesive liquid layer between the layers of the multi-layer amorphous alloy ribbon using a spraying process, the method further includes: The multi-layer amorphous alloy ribbon containing the adhesive liquid layer is subjected to a pressing process and a tension control process to adjust the thickness of the adhesive liquid layer to 2 μm-4 μm.

4. The method for preparing an amorphous iron core according to any one of claims 1 to 3, characterized in that: The viscosity of the adhesive at room temperature is 15 mm 2 / s-320mm 2 / s; and / or The bonding liquid includes anti-rust oil; and / or In the composite amorphous alloy ribbon, the bonding strength between layers of the amorphous alloy ribbon is 0.006 N / mm-0.01 N / mm; and / or The number of layers of the multi-layer amorphous alloy ribbon is 2 to 10; and / or The thickness of each layer of the amorphous alloy strip is 0.025 mm to 0.03 mm.

5. The method for preparing an amorphous iron core according to any one of claims 1 to 3, characterized in that: The step of punching the composite amorphous alloy strip to obtain a punched sheet specifically includes: Performing a deviation correction process on the composite amorphous alloy ribbon so that each layer of the amorphous alloy ribbon is on the same track; The composite amorphous alloy strip that has undergone the deviation correction process is transported to a stamping die, and the stamping die performs a stamping process on the composite amorphous alloy strip to obtain the punched sheet.

6. The method for preparing an amorphous iron core according to claim 5, characterized in that: The stamping die performing stamping processing on the composite amorphous alloy strip further comprises: A blowing mechanism is used to blow the stamping die to remove debris on the stamping die.

7. The method for preparing an amorphous iron core according to any one of claims 1 to 3, characterized in that: The method for preparing the amorphous iron core further includes: rolling up the stamped multi-layer amorphous alloy strip.

8. The method for preparing an amorphous iron core according to any one of claims 1 to 3, characterized in that: The step of curing the punched sheet with glue specifically includes: The punching sheets are stacked and compacted to obtain laminated punching sheets; impregnating the laminated sheets with a glue solution to obtain laminated sheets containing the glue solution; The laminated punching sheets after the impregnation treatment are pressed and the glue is solidified to obtain the amorphous iron core.

9. The method for preparing an amorphous iron core according to any one of claims 1 to 3, characterized in that: The material of the glue includes one or more of epoxy resin water, polyurethane, and acrylic compound; and / or The curing time is 3h-5h; and / or The curing temperature is 150°C-200°C.

10. An amorphous iron core, characterized in that: The amorphous iron core is prepared by the preparation method according to any one of claims 1 to 9.

11. A motor, characterized in that: The invention comprises the amorphous iron core according to claim 10 or an amorphous iron core prepared by the preparation method according to any one of claims 1 to 9.

12. A vehicle, characterized in that: The invention comprises the amorphous iron core according to claim 10 or the amorphous iron core prepared by the preparation method according to any one of claims 1 to 9, or the motor according to claim 11.

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