CN110815052A - Preparation method and product of iron-based amorphous alloy stator core based on water jet cutting - Google Patents

Abstract

The invention discloses a preparation method of an iron-based amorphous alloy stator iron core based on water jet cutting and a product thereof, wherein the method takes an amorphous alloy strip as a base, uniformly cuts the amorphous alloy strip to a preset size, then stacks the amorphous alloy strip with a preset number of layers, and applies a preset pressure in the axial direction by using a clamp so as to ensure that the amorphous alloy strips are tightly attached; sequentially carrying out vacuum impregnation, high-temperature curing and other processes on the stacked amorphous alloy laminations to obtain bonded amorphous alloy plates; and then the amorphous alloy plate is cut by a water jet cutter to be processed and formed, and finally the amorphous alloy stator core product is obtained, and almost no heat is generated during water jet cutter cutting, so that the risks of crystallization and oxidation of the iron-based amorphous alloy in other cutting methods can be effectively avoided, the original excellent performance of the iron-based amorphous alloy is ensured, the processing cost is effectively reduced, the processing efficiency is high, the applicability is wide, and the wide popularization and application is facilitated.

Description

Preparation method and product of iron-based amorphous alloy stator core based on water jet cutting

technical field

The invention relates to the technical field of preparation of motor stator iron cores, in particular to a preparation method of an iron-based amorphous alloy stator iron core based on water jet cutting and an iron-based amorphous alloy stator iron core product.

Background technique

Iron-based amorphous alloy is a new type of soft magnetic alloy material, and its atomic arrangement has the characteristics of short-range order and long-range disorder. In addition, the ultra-fine grain structure of iron-based nanocrystals makes it have the advantages of high initial permeability, low core loss rate and high stability, and is expected to replace traditional silicon steel, ferrite, etc. Electronic products and devices with high stability requirements. Especially with the increase of frequency (>800 Hz), the advantages of low magnetic loss of soft magnetic amorphous alloys compared to silicon steel are more obvious. Therefore, soft magnetic amorphous alloys are more suitable for use in stator cores of high-speed and high-frequency motors, thereby greatly reducing energy loss and noise.

It is difficult to effectively process amorphous alloys by traditional processing methods, because amorphous alloys are metastable materials, which will undergo rapid relaxation or even crystallization under high temperature or strong strain, making the original excellent characteristics disappear.

Thermoplastic molding or blow molding can be used to process amorphous alloys, but these methods have very high requirements on material-related properties and require materials to have a wide supercooled liquid phase region, so such methods can be used to process amorphous alloys. The variety of materials is limited, and the long forming time results in a high risk of material being oxidized and crystallized during the process.

At present, the cutting methods of metal materials mainly include tool cutting, laser cutting, plasma cutting, flame cutting, electric spark cutting, wire cutting, water jet cutting, etc. Among many cutting methods, water jet cutting is the only cold cutting method, which can effectively avoid the risk of oxidation and crystallization of amorphous alloy materials during the cutting process.

There is no chemical change in the water jet cutting process, and it has no adverse effect on the physical and chemical properties of the cutting material, and has the advantages of no thermal deformation, narrow slit, high precision, clean cut surface and no pollution. It has a wide range of processing applications and can be used for materials that cannot or are difficult to process by traditional processing methods, such as glass, ceramics, composite materials, reflective materials, chemical fibers, heat-sensitive materials, etc. After cutting, the cutting surface is neat and smooth, similar to the effect after sandblasting.

Invention patent CN201010211940.7 discloses a method for preparing an amorphous alloy stator core of a high-frequency motor. In the invention, the conventional amorphous alloy powder and the binder are fully mixed, and then the mixed alloy powder is press-molded in a specific mold to form a stator core of the desired shape and size. The method for preparing an amorphous alloy stator iron core has high material utilization rate and less waste, but is limited to a certain extent for preparing a stator iron core with a complex groove shape.

Invention patent CN201610221769.5 discloses a preparation method of an amorphous alloy motor stator core. In the invention, the amorphous alloy strips are laminated into multi-layered sheets, metal sheets are sandwiched at certain thicknesses, the amorphous alloy sheets and the metal sheets are bonded with inorganic high-temperature glue, and finally the final stator iron is obtained by wire cutting. core. This method can increase the mechanical strength of the amorphous alloy stator gear and the end teeth of the iron core by adding high-frequency silicon steel sheets, high-strength aluminum alloy sheets or magnesium alloy sheets at both ends and in the middle of the amorphous alloy stator core. There is still a certain risk of crystallization during the wire cutting process.

SUMMARY OF THE INVENTION

In view of the above deficiencies, the purpose of the present invention is to provide a method for preparing an iron-based amorphous alloy stator core based on water jet cutting and an iron-based amorphous alloy stator core product.

For achieving the above object, the technical scheme provided by the present invention is:

A method for preparing an iron-based amorphous alloy stator core based on water jet cutting, comprising the following steps:

(1) Cut out a plurality of amorphous alloy flakes with desired shape and size from the amorphous alloy strip as required;

(2) stacking the amorphous alloy flakes to a required number, fixing them with a clamp, and applying an adjustable pressure in the stacking direction to obtain a flake stack;

(3) performing a low-vacuum dipping process and a high-temperature curing process on the sheet stack successively, and after curing, an amorphous alloy block is obtained;

(4) Remove the excess rubber material and correct corners on the amorphous alloy block, and then perform waterjet cutting processing by a waterjet cutting machine to obtain an iron-based amorphous alloy stator core product.

As an improvement of the present invention, the composition of the amorphous alloy strip is Fe ₇₈ Si ₉ B ₁₃ . It has the characteristics of high magnetic permeability and low loss.

As an improvement of the present invention, the thickness of the amorphous alloy strip is 10-25 μm, preferably 20 μm, which is reasonable in thickness and easy to design.

As an improvement of the present invention, the stacking quantity of the amorphous alloy flakes in the step (2) is 50-200 pieces. 50, 100 and 200 tablets are preferred.

As an improvement of the present invention, in the step (2), the adjustable pressure applied in the stacking direction is 0-100 MPa, which has high flexibility and meets practical pressure application requirements.

As an improvement of the present invention, the vacuum degree of the low-vacuum dipping process in the step (3) is less than 200Pa, which is more conducive to the immersion of the glue solution.

As an improvement of the present invention, the glue used in the low-vacuum dipping process in the step (3) is epoxy resin glue with the trade name E1228MR; good bonding effect, high impact resistance, firmness and flexibility, and solvent resistance it is good. The curing temperature of the high-temperature curing process in the step (3) is 140-160° C., and the curing time is 100-140 min. After curing, the film has good toughness, high impact strength, good anti-vibration effect, low expansion coefficient and high temperature resistance.

As an improvement of the present invention, the model of the water jet cutting machine in the step (4) is a water jet cutting machine of Proto Max. Small size, safe and easy to operate.

As an improvement of the present invention, the abrasive used in the water jet cutting machine is 80 mesh garnet particles, the abrasive flow rate is 0.635Kg/min, the high pressure of the nozzle is set to 413.69MPa, and the low pressure is set to 137.9MPa. While ensuring the cutting speed, it also improves the cutting effect. After cutting, the cutting surface is neat and smooth, and the kerf is small, and the characteristics of cooling cutting can improve the material utilization rate.

An iron-based amorphous alloy stator core product prepared by using the above-mentioned method for preparing an iron-based amorphous alloy stator core based on water jet cutting. The integrity is good, the cutting surface is smooth and smooth, and the comprehensive performance is good.

The beneficial effects of the present invention are as follows: the present invention reasonably selects iron-based amorphous alloys and performs cutting in combination with water jets, almost no heat is generated during cutting by water jets, thus effectively avoiding the crystallized iron-based amorphous alloys existing in other cutting methods. It can ensure the original excellent performance of the iron-based amorphous alloy to the greatest extent, and then solve the problem of rapid tool wear caused by the high hardness of the iron-based amorphous alloy in the traditional processing method, reduce the processing cost, and improve the processing efficiency. High performance, wide applicability, favorable for wide popularization and application; the iron core product prepared by the water jet cutting-based iron-based amorphous alloy stator iron core preparation method has the advantages of smooth and smooth cutting surface, good integrity and the like.

The present invention will be further described below with reference to the accompanying drawings and embodiments.

Description of drawings

Fig. 1 is the flow chart of the preparation method of the present invention.

FIG. 2 is a schematic structural diagram of the iron-based amorphous alloy stator core product of the present invention.

Detailed ways

Embodiment: Referring to FIG. 1, the present embodiment provides a method for preparing an iron-based amorphous alloy stator core based on water jet cutting, which includes the following steps:

(1) Cut the amorphous alloy strip into a plurality of amorphous alloy flakes with desired shape and size according to the requirements; the composition of the amorphous alloy strip is preferably Fe ₇₈ Si ₉ B ₁₃ , which has high magnetic permeability and low loss characteristics. The thickness of the amorphous alloy strip is 10-25 μm, preferably 20 μm.

(2) Stack the amorphous alloy flakes to a desired thickness, fix them with a jig, and apply an adjustable pressure in the stacking direction, specifically, apply an adjustable pressure of 0-100 MPa in the stacking direction, and fix by applying pressure Then, a stack of sheets is obtained; preferably, the stacking quantity of the amorphous alloy sheets is 50-200 sheets. The number of stacks is preferably 50 sheets, 100 sheets or 200 sheets. Among them, 50 pieces of amorphous alloy flakes are stacked with a thickness of about 0.1mm; 100 pieces of amorphous alloy flakes are stacked with a thickness of about 0.2mm; and 200 pieces of amorphous alloy flakes are stacked with a thickness of about 0.4mm;

(3) The low-vacuum dipping process and the high-temperature curing process are sequentially performed on the sheet stack, and after curing, an amorphous alloy block is obtained; wherein the vacuum degree of the low-vacuum dipping process is less than 200Pa. The glue used in the low vacuum dipping process is preferably epoxy resin glue with the grade of E1228MR; it has good bonding effect, high impact strength, firmness and flexibility, and good solvent resistance. The curing temperature of the high-temperature curing process in the step (3) is 140-160° C., preferably 150° C., and the curing time is 100-140 min, preferably 120 min; after curing, the adhesive film has good toughness, high impact strength, and shock resistance. Good dynamic effect, low expansion coefficient, high temperature resistance.

(4) Remove excess sizing material and correct corners on the amorphous alloy block, and then perform water jet cutting and forming by a water jet cutting machine to obtain an iron-based amorphous alloy stator core product, see Figure 1. The model of the water jet cutting machine is ProtoMax water jet cutting machine. Proto MAX integrates the cutting table and the pump into one. The equipped pump is 5HP and the cutting power is 30000psi. It is a smart, safe and easy-to-operate water cutting equipment. During use, Proto MAX closes the water jet cover, and the amorphous alloy block is submerged in water for safe and silent cutting (the noise is 76 decibels). When cutting, the water does not splash out, which ensures the cleanliness of the processing environment. In addition, Proto MAX does not generate heat-affected zones during cutting, nor does it change the properties of amorphous alloy bulk materials.

During the processing, the abrasive used by the water jet cutting machine is preferably 80 mesh garnet particles, the abrasive flow rate is preferably 0.635Kg/min, the high pressure setting of the nozzle is preferably 413.69MPa, and the low pressure setting is preferably 137.9MPa. The setting of each parameter is scientific and reasonable, which can effectively improve the cutting speed and cutting accuracy, that is, while ensuring the cutting efficiency, it also improves the cutting quality. After cutting, the cutting surface is neat and smooth, and the kerf is small, and the characteristics of cooling cutting can improve the utilization rate of materials.

In the specific cutting process, the thickness of 50 pieces of amorphous alloy flakes is about 0.1mm, and the cutting time is about 0.46min; the thickness of 100 pieces of amorphous alloy flakes is about 0.2mm, and the cutting time is about 0.46min; The thickness of the stack of crystal alloy flakes is about 0.4mm, and the cutting time is about 0.53min; while under the same processing conditions, the cutting time of wire cutting is more than 20min. Compared with the traditional wire cutting processing method, the preparation method of the iron-based amorphous alloy stator core based on the water jet cutting of the present invention greatly improves the processing efficiency. Moreover, almost no heat is generated during waterjet cutting, so the risk of crystallization and oxidation of iron-based amorphous alloys in other cutting methods can be effectively avoided, and the original excellent performance of iron-based amorphous alloys can be guaranteed to the greatest extent. Further, the problem of rapid tool wear caused by the high hardness of the iron-based amorphous alloy in the traditional processing method is solved, and the processing cost is reduced.

The iron-based amorphous alloy stator core product prepared by the water-jet cutting-based iron-based amorphous alloy stator core preparation method of the present invention has a smooth and smooth cutting surface, good integrity and comprehensive performance.

Based on the disclosure and teaching of the above specification, those skilled in the art to which the present invention pertains can also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention. As described in the above embodiments of the present invention, other methods and products obtained by adopting the same or similar steps are all within the protection scope of the present invention.

Claims (10)

1. an iron-based amorphous alloy stator core preparation method based on water jet cutting, is characterized in that: it comprises the following steps: (1) Cut out a plurality of amorphous alloy flakes with desired shape and size from the amorphous alloy strip as required; (2) stacking the amorphous alloy flakes to a required number, fixing them with a clamp, and applying an adjustable pressure in the stacking direction to obtain a flake stack; (3) performing a low-vacuum dipping process and a high-temperature curing process on the sheet stack successively, and after curing, an amorphous alloy block is obtained; (4) Remove the excess rubber material and correct corners on the amorphous alloy block, and then perform waterjet cutting processing by a waterjet cutting machine to obtain an iron-based amorphous alloy stator core product. 2 . The method for preparing an iron-based amorphous alloy stator core based on water jet cutting according to claim 1 , wherein the composition of the amorphous alloy strip is Fe ₇₈ Si ₉ B ₁₃ . 3 . 3 . The method for preparing an iron-based amorphous alloy stator core based on water jet cutting according to claim 1 or 2 , wherein the thickness of the amorphous alloy strip is 10-25 μm. 4 . 4 . The method for preparing an iron-based amorphous alloy stator core based on water jet cutting according to claim 1 , wherein the number of stacks of amorphous alloy flakes in the step (2) is 50-200. 5 . 5 . The method for preparing an iron-based amorphous alloy stator core based on water jet cutting according to claim 1 , wherein in the step (2), an adjustable pressure of 0-100 MPa is applied in the stacking direction. 6 . 6 . The method for preparing an iron-based amorphous alloy stator core based on water jet cutting according to claim 1 , wherein the vacuum degree of the low-vacuum dipping process in the step (3) is less than 200Pa. 7 . 7. the iron-based amorphous alloy stator core preparation method based on water jet cutting according to claim 1, is characterized in that: the glue that the low-vacuum dipping operation in described step (3) uses is that the trade mark is E1228MR Epoxy resin glue; the curing temperature of the high-temperature curing process in the step (3) is 140-160° C., and the curing time is 100-140 min. 8. the iron-based amorphous alloy stator core preparation method based on water jet cutting according to claim 1, is characterized in that: the water jet cutting machine of described step (4) is the water jet cutting machine that model is Proto Max . 9. The method for preparing an iron-based amorphous alloy stator core based on water jet cutting according to claim 1 or 8, wherein the abrasive used by the water jet cutting machine is a granularity of 80 mesh garnet particles, and the abrasive is The flow rate was 0.635Kg/min, the high pressure of the nozzle was set to 413.69MPa, and the low pressure was set to 137.9MPa. 10. An iron-based amorphous alloy stator core product prepared by using the waterjet cutting-based iron-based amorphous alloy stator core preparation method according to any one of claims 1 to 9.

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