CN111478530A

CN111478530A - Manufacturing process of radial flux cylinder type motor iron core

Info

Publication number: CN111478530A
Application number: CN202010485122.XA
Authority: CN
Inventors: 裴瑞琳; 高凌宇
Original assignee: Suzhou Yingci New Energy Technology Co ltd
Current assignee: Suzhou Yingci New Energy Technology Co ltd
Priority date: 2020-06-01
Filing date: 2020-06-01
Publication date: 2020-07-31

Abstract

The invention discloses a manufacturing process of a radial flux cylinder type motor iron core, which is characterized in that an amorphous or nanocrystalline thin strip is subjected to paint dipping and heating and then is sequentially laminated and wound on a polygonal roller, so that the strip wound on the polygonal roller is solidified to form a closed annular plate body; then ejecting the annular plate body out of the polygonal roller, cutting, and cutting off arc corner parts to form a plurality of rectangular iron core blocks; and then, carrying out cold cutting on the iron core blocks to form stator and rotor iron core blocks, carrying out annealing treatment, and finally, carrying out segmented oblique pole stacking on the stator and rotor iron core blocks to form the motor iron core. When the lamination forming die is used, the amorphous/nanocrystalline thin strip thick coil is used for paint dipping, winding, curing and integral cutting, and then the stator and rotor iron core blocks are formed, so that the traditional lamination process is replaced, the loss is reduced, and the processing time and the cost are reduced.

Description

Manufacturing process of radial flux cylinder type motor iron core

Technical Field

The invention mainly relates to the technical field of motor iron cores, in particular to a manufacturing process of a radial magnetic flux cylinder type motor iron core, and particularly relates to a manufacturing process of a motor iron core made of an amorphous or nanocrystalline thin strip.

Background

In the prior art, in the design of a permanent magnet synchronous motor for a vehicle, an excitation iron core is often formed by laminating traditional silicon steel sheet materials, and the weight of the excitation iron core occupies more than 80% of the weight of the whole motor. The iron core is used for excitation in the motor and is made of soft magnetic material capable of being magnetized repeatedly. The standard for measuring the soft magnetic property of the iron core material needs to pay attention to the coercive force in a magnetic hysteresis loop, the area of the magnetic hysteresis loop and the saturation magnetic density value. The amorphous/nanocrystalline material has a smaller area of a hysteresis loop, lower coercive force Hc and smaller loss.

The amorphous material has no crystal boundary structure on the millimeter scale because the atomic arrangement is irregular, so that a magnetic domain wall cannot be pinned by the crystal boundary, and the hysteresis loss of the amorphous/nanocrystalline material is lower than that of the silicon steel material. For thin-plate magnetic materials, the magnitude of eddy current loss is inversely proportional to the material conductivity and is proportional to the material thickness d, the magnetic field peak Bm, and the square of the current frequency f. The electric conductivity of the amorphous/nanocrystalline material is larger than that of the silicon steel material, and the ultra-thin strip prepared by the ultra-cold method is only 2-4 mu m, which is one tenth of the thickness of the silicon steel sheet, so that the amorphous/nanocrystalline material has better high-frequency eddy current loss characteristic. In addition, compared with the traditional silicon steel material, the amorphous/nanocrystalline material has better mechanical property and excellent corrosion resistance. The yield strength of the traditional silicon steel is only 300-400MPa, so that the design of the rotor topological structure is greatly limited. Compared with silicon steel materials, amorphous/nanocrystalline materials have higher tensile yield strength, and the yield strength of the amorphous/nanocrystalline materials is generally in the order of gigapascals, so that the amorphous/nanocrystalline materials can bear larger centrifugal force when a motor rotates at high speed, and the ultimate design of the motor is facilitated.

The amorphous soft magnetic material is mostly prepared by dripping a supercooled molten metal on a rotating roller and controlling the cooling rate of the molten metal to reach 106K/s level, so that a solid amorphous thin strip is prepared. The amorphous thin strip manufactured by the ultra-cold method is extremely thin and has the thickness of 1/10 of the thickness of the traditional silicon steel material, so that if the iron core is manufactured by the traditional laminating process, the cost is 10 times of that of the silicon steel material, and great resource waste is caused.

Earlier patent publications US4155397\ US4363988\ US4578610 and the like all adopt a production method for producing amorphous iron cores of silicon steel sheet motor iron cores, which not only wastes manpower and material resources in a large quantity, but also produces greater damage to a sheet punching die due to the high strength of amorphous materials, greatly reduces the service life of the die and causes great cost waste.

Then, for the core manufacturing technology of the radial amorphous motor, due to cost consideration, the maximum width of the amorphous strip is limited, and a plurality of motor cores with larger outer diameters mostly adopt a block structure, such as a block structure

CN101800456A/CN103872857A/US7067950B 2. Because the motor iron core is manufactured in the mode, the integral cylinder type stator iron core is split into the smaller unit modules, the robustness of the integral system can be greatly reduced, large allowance is reserved for selecting air gaps, and the power density of the whole machine is greatly reduced. Meanwhile, the block amorphous iron core can generate larger internal stress in the adjacent unit iron cores due to the special physical structure of the block amorphous iron core, and the electromagnetic performance of the amorphous iron core can be further deteriorated by the processing method because the amorphous/nanocrystalline material is sensitive to the residual stress.

Because of the special magnetic field direction of the disc motor, a single die can be used for punching and shearing thin strips at different spacing positions to form a stator core through a winding process, such as that described in patents of US7018498B2/US0032141a1 and the like. Since amorphous materials have high resistivity and good corrosion resistance, they do not need to be coated on the surface, and therefore, thin strips can be wound, cured with an insulating material such as resin, and then subjected to a process such as cutting to manufacture the slots of a disk motor, as described in patent CN105490400A/CN 105471202A. However, the special physical structure of the disc motor determines that the rotor mass is more unevenly distributed along the rotating shaft direction, so that the rotational inertia is larger, the rotating speed of the motor is limited, and the advantages of the amorphous material under the high-frequency working condition are difficult to be embodied in the operation of the motor. If the rotating speed of the disc type amorphous motor is increased, the rotational inertia can be reduced only by reducing the outer diameter, and the outer diameter of the motor is reduced, so that the power of the whole machine is reduced, and the disc type amorphous motor is difficult to apply to occasions with higher power.

In summary, the stator processing technology of the amorphous motor is a technical problem to be solved urgently, if the traditional punching, shearing and laminating mode is adopted, a large amount of working hours are wasted due to the laminating technology, meanwhile, the loss of a single punching die is aggravated due to the higher hardness and strength of the amorphous material, and the die cost is increased.

Disclosure of Invention

Aiming at the problems, the invention provides a manufacturing process of a radial magnetic flux cylinder type motor iron core, which is characterized in that an amorphous or nanocrystalline thin strip is wound on a roller to form an annular plate, and the annular plate is solidified and cut to form an amorphous block stator and rotor, so that the process is simple, the loss is reduced, and the production cost is reduced.

The purpose of the invention can be realized by the following technical scheme: a, sequentially laminating and winding amorphous or nanocrystalline thin strips on a polygonal roller after paint dipping and heating; b. the strip wound on the polygonal roller is solidified to form a closed annular plate body; c. the annular plate body is cut after being ejected out of the polygonal roller, and arc corner parts are cut off to form a plurality of rectangular iron core blocks; d. and performing cold cutting on the iron core blocks to form stator and rotor iron core blocks, then performing annealing treatment, and finally performing segmented oblique-pole stacking on the stator and rotor iron core blocks to form the motor iron core.

Preferably, in the step a, a paint dipping groove and a heating pipe are arranged, a first movable pulley and immersion liquid are arranged in the paint dipping groove, the first movable pulley is immersed by the immersion liquid, the heating pipe is of a hollow structure, a first fixed pulley and a second fixed pulley are arranged above the heating pipe, and the amorphous or nanocrystalline strip is wound on the polygonal roller after sequentially passing around the first movable pulley, the first fixed pulley and the second fixed pulley; and a paint scraping step is also arranged in the paint dipping and heating steps, and a paint scraper corresponding to the passing position of the strip is arranged between the heating pipe and the paint dipping tank.

Further, the paint scraper is a group of paint scraping plates symmetrically arranged along two sides of the strip material, the distance between the two paint scraping plates is +/-1-3 mu m, so that the thickness of immersion liquid on the surface of the strip material is 1-3 mu m; the heating temperature range of the heating pipe is 50-320 ℃.

Compared with the prior art, the technical scheme of the invention comprises the improvement of a plurality of details besides the improvement of the whole technical scheme, and particularly has the following beneficial effects:

1. according to the improved scheme, the amorphous/nanocrystalline thin strip thick coil is subjected to paint dipping, winding, curing and integral cutting, and then the stator and rotor iron core blocks are formed, so that the traditional lamination process is replaced, the loss is reduced, and the processing time and cost are reduced;

2. in the technical scheme of the invention, the stator and rotor iron core blocks are subjected to an annealing process, so that the internal stress generated by the processing process is released, and the overall electromagnetic performance of the stator and rotor iron core blocks is further improved;

3. the process design of the invention is reasonable, the production process of the invention can greatly reduce the lamination cost, can save the process of laminating, curing and molding, and has great popularization value.

Drawings

FIG. 1 is a process flow diagram of the present invention.

Fig. 2 is a schematic diagram of the structure of the belt material of the present invention cured on a roller to form an annular plate.

Fig. 3 is a schematic structural view of a cut arc portion of the annular plate material of the present invention.

Fig. 4 is a schematic structural view of the ring-shaped plate material of the present invention cut into core blocks.

Fig. 5 is a schematic structural view of the core block of the present invention being cut into stator and rotor core blocks.

FIG. 6 is a schematic view of another embodiment of the present invention showing the strip material solidified on the rollers to form an annular plate.

FIG. 7 is a schematic view of the cut arc portion of the circular sheet of material of FIG. 6.

Fig. 8 is a reference diagram of the use state of the present invention.

FIG. 9 is a schematic view of the construction of a polygonal roll according to the present invention.

The labels in the figure are as follows:

the production process comprises the following steps of (1) amorphous or nanocrystalline thin strip, 2 dip coating grooves, 3 paint scrapers, 4 heating furnaces, 5 annular plate bodies, 6 polygonal rollers, 7 first movable pulleys, 8 second movable pulleys, 9 first fixed pulleys, 10 second fixed pulleys, 11 arc parts, 12 iron core blocks and 13 stator and rotor iron core blocks;

the shaft 61 is rotated, the clamping plate 62 is rotated, and the weight removing hole 63 is formed.

Detailed Description

The following detailed description of the embodiments of the present invention will be given in conjunction with the accompanying drawings to make it clear to those skilled in the art how to practice the present invention. While the invention has been described in connection with preferred embodiments thereof, these embodiments are merely illustrative, and not restrictive, of the scope of the invention.

As shown in figure 1, the manufacturing process of the radial flux cylinder type motor iron core is different from the prior art in that the manufacturing process comprises the following steps of a, sequentially laminating and winding an amorphous or nanocrystalline thin strip on a polygonal roller after dipping paint and heating; b. the strip wound on the polygonal roller is solidified to form a closed annular plate body; c. the annular plate body is cut after being ejected out of the polygonal roller, and arc corner parts are cut off to form a plurality of rectangular iron core blocks; d. and performing cold cutting on the iron core blocks to form stator and rotor iron core blocks, then performing annealing treatment, and finally performing segmented oblique-pole stacking on the stator and rotor iron core blocks to form the motor iron core.

Specifically, the thickness of the amorphous and nanocrystalline strips is 1/10 of the traditional silicon steel sheet, and the specific thickness is about 0.02-0.04 mm. The hysteresis loop of the amorphous/nanocrystalline material has a smaller area, and the coercivity Hc is lower, which directly leads to lower hysteresis loss of the soft magnetic material. In the amorphous soft magnetic material, the alternating current loss of the amorphous soft magnetic material is limited to increase along with the rising of the electric excitation frequency, and the alternating current loss is smaller than that of the silicon steel material. Meanwhile, the amorphous material has no crystal grain/crystal boundary structure inside; the nanocrystalline material has only a very small grain/grain boundary structure, so that the abnormal loss of the nanocrystalline material is obviously reduced compared with the silicon steel material with complicated internal grains. According to a material data simulation result, the loss of a motor with 6w turns is 10 times different when an amorphous material and a silicon steel material are adopted for excitation, and the total iron loss is 1/5-1/6 of a silicon steel excitation iron core according to a prototype result under the condition that restriction factors such as processing factors, stress residue and the like are considered.

The non-circular polygonal roller is adopted to wind the non-circular thin amorphous strip, the torque of the roller generates stress concentration due to the intersection line of two sides of the polygon, and further the non-circular thin amorphous strip is broken, so that the polygonal roller adopts a chamfering process, the chamfering radius is 6-13mm, such as a regular hexagon structure, the chamfering radius is preferably 10mm, a regular quadrilateral structure, the chamfering radius is preferably 7mm, the chamfering radius is preferably 8mm, and the winding process strictly controls the torque and the rotating speed of the roller, so that the non-circular thin amorphous strip is prevented from being broken due to process parameter problems.

Furthermore, in the application case, the polygon roller is designed to be a regular polygon, and can be popularized to be a polygon with all internal angles and n pi, wherein n is a positive integer, and the preferable regular polygon is a 4-8 polygon.

Example 1

Firstly, after being dipped and heated, amorphous or nanocrystalline thin strips are sequentially laminated and wound on a polygonal roller, wherein the polygonal roller is made of regular pentagons, the side length of the polygonal roller is 180mm, so that cuboid iron core blocks with a large number of cut parts can be obtained, and too many arc-shaped parts do not need to be cut off; secondly, arranging a paint dipping groove and a heating pipe, wherein a first movable pulley and immersion liquid are arranged in the paint dipping groove, the first movable pulley is immersed by the immersion liquid, the heating pipe is of a hollow structure, a first fixed pulley and a second fixed pulley are arranged above the heating pipe, and an amorphous or nanocrystalline strip is wound on the polygonal roller after sequentially passing around the first movable pulley, the first fixed pulley and the second fixed pulley; and a paint scraping step is also arranged in the paint dipping and heating steps, and a paint scraper corresponding to the passing position of the strip is arranged between the heating pipe and the paint dipping tank.

The liquid contained in the paint dipping groove can be epoxy resin and acetone curing agent with a molar volume ratio of 1: 6, can also be phenolic resin glue, temperature-resistant epoxy glue, polyimide glue and the like, and can also be inorganic bonding glue comprising TW series, S L series or ZS series and the like, the materials are the prior art, so the specific models and product functions are not repeated, the insulating paint and the bonding glue for realizing the curing function are the prior art and can be obtained by market purchase, after the amorphous ribbon is subjected to the paint dipping process, redundant dipping liquid is removed by a paint scraper, the paint scraper is a group of paint scraper plates symmetrically arranged along the two sides of the ribbon, the dipping liquid is ensured to be uniformly distributed along the amorphous ribbon, the distance between the two paint scraper plates is selected to ensure that the thickness range of the dipping liquid coating is 1-3 mu m, therefore, the distance between the two paint scraper plates is the thickness range of +/-1-3 mu m of the selected amorphous ribbon, then the semi-dry treatment is carried out by a dry heating pipe, so that the surface of the ribbon can be firmly attached without losing the bonding performance, the amorphous ribbon is selected according to different components, the temperature range is selected, the temperature is controlled to be within a range of the selected, the temperature of the amorphous ribbon is controlled to be within a range of 1-3 mu m, the temperature range, the heating temperature of the heating pipe, the heating pipe is adopted, the dipping liquid is 365-320 ℃, the dipping liquid.

Then, the tension generated by winding the strip material at the rotating speed of the polygonal roller is monitored by a tension meter, the tension meter is arranged between the roller and the strip material, the tension of the roller on the strip material is controlled between 50 and 400N, so that the strip material is cured, the rotating speed of the polygonal roller is 50 to 500 revolutions per minute, the lamination coefficient of the iron core block is selected to be in the range of 0.85 to 0.98, preferably 0.91 and 0.93, the rotating speed of the polygonal roller is controlled to be 50 to 500 revolutions per minute, preferably 250 to 120 revolutions per minute, and the temperature range of a temperature field during curing is 120-400 ℃.

The polygonal roller can realize the integral forming of the polygonal amorphous/nanocrystalline thick roll by the process method. And ejecting the formed polygonal amorphous/nanocrystalline thick roll through bolts on two end faces of the roller after forming, wherein the selected cutting mode is a cold cutting mode but not limited to the cold cutting mode, so that the melting phenomenon among amorphous thin belt layers is reduced as much as possible, and the preferred cutting modes comprise chemical corrosion cutting, laser cutting, water cutting and jet flow water abrasive cutting. The cut amorphous thick plate needs to be processed into a stator and rotor core block through a further cutting process, and because of the complexity of the topological structure of the stator and the rotor of the motor, the tolerance caused by the selected cutting mode is considered in the cutting process, and the preferred cutting modes are slow-moving wire cutting and jet flow water abrasive cutting. The technical route that can be selected when cutting is to add the apron at amorphous thick plate both ends, the apron is connected with affiliated amorphous thick plate through mechanical connection, and the apron material selects magnetic isolation material, and preferred is austenite steel material, but not limited to austenite steel material, still includes alloys such as iron, aluminium, copper.

Example 2

The invention provides a technology for performing paint dipping, winding, curing, integral cutting and formed amorphous block stator and rotor cutting on a formed amorphous/nanocrystalline thin strip thick coil by adopting a polygonal roller, and the processing method of the cylindrical amorphous motor excitation iron core replaces the traditional processing method of laminating an amorphous thin strip, performing paint dipping and curing and then performing cutting.

A, sequentially laminating and winding an amorphous or nanocrystalline thin strip on a polygonal roller after paint dipping and heating; b. the strip wound on the polygonal roller is solidified to form a closed annular plate body; c. ejecting the annular plate body from the polygonal roller, cutting, and cutting off arc corner parts to form a plurality of cuboid iron core blocks; d. and performing cold cutting on the iron core blocks to form stator and rotor iron core blocks, then performing annealing treatment, and finally performing segmented oblique-pole stacking on the stator and rotor iron core blocks to form the motor iron core.

The adopted polygonal roller is of a regular hexagon structure, the length of a single side of the regular hexagon is 140-280mm, 200mm is preferred in the embodiment, six cuboid iron core blocks can be obtained at one time by adopting the regular hexagon structure, and the efficiency is higher. As the noncircular regular hexagonal roller is adopted to wind the amorphous thin belt, the curvature of the noncrystalline material wound on each layer of the belt is gradually increased, so that the thickness of the polygonal noncrystalline thick roll to be wound needs to be optimized by the process, and the thickness is selected within the range of 15-105 mm, preferably 50-80 mm.

And b, applying pressure along the surface normal method of the annular plate wound on the regular hexagon roller to cure the strip, wherein the pressure is 1-20Mpa, so that the strip attached with the immersion liquid is molded by pressurization and curing, and the pressure applied can be selected according to the lamination coefficient of 0.85-0.98. This technical approach allows to achieve a greater lamination factor, but the system is more complex. Meanwhile, due to the strong magnetostriction characteristic of the amorphous material, the electromagnetic characteristic and the vibration characteristic of the amorphous material are limited by an excessively high lamination coefficient, and the preferable lamination coefficient is 0.88-0.93. Meanwhile, the temperature field is selected within the range of 120-400 ℃ according to different components of different immersion liquids. Specifically, the rotating shaft of the polygonal roller is driven by a rotating motor, the motor provides rotating speed and torque to drive the polygonal roller to rotate, the rotating motor generates torque when rotating, and the torque rotating in a single direction generates pressure on the surface of the thin strip.

And c, cutting the annular plate body into iron core blocks as large as possible in a cold cutting mode, wherein the cutting point is the joint of a straight line of the inner side wall and a curved surface from the inner side wall of the annular plate body. The reason why the inner surface is selected is that when the amorphous ribbon is formed into a square coil by winding, the chamfer or curvature of the intersection of the sides of the cross section is increased, and if the straight portion of the outer ring is selected to be cut inward perpendicular to the material surface, there is a high possibility that interference with the chamfer having a curvature of the inner ring surface other than 0 occurs, that is, the inner ring is not a flat portion. It is therefore defined here that the cold cutting is performed from the inner ring towards the outer ring, enabling the obtaining of flat core blocks of maximum size.

And d, arranging cover plates at two ends of the iron core block, wherein the cover plates are made of a magnetism isolating material, inert gas is adopted in the annealing process to protect the annealing atmosphere, the annealing temperature in the annealing process is selected to be 110-580 ℃, the annealing time is selected to be 0.5-4.5 hours, the heating rate is selected to be 1-30 ℃/min, a magnetic field along the radial direction of the motor can be applied to the iron core block in the annealing process, and the applied magnetic field is 0-0.5T.

Example 3

The invention adopts a polygonal roller to carry out paint dipping, winding, curing, integral cutting and formed amorphous block stator and rotor cutting on a formed amorphous/nanocrystalline thin strip thick coil, and replaces the traditional processing method of a cylinder amorphous motor excitation iron core, which carries out cutting after laminating, paint dipping and curing an amorphous thin strip. A, sequentially laminating and winding an amorphous or nanocrystalline thin strip on a polygonal roller after paint dipping and heating; b. the strip wound on the polygonal roller is solidified to form a closed annular plate body; c. the annular plate body is cut after being ejected out of the polygonal roller, and arc corner parts are cut off to form a plurality of rectangular iron core blocks; d. and performing cold cutting on the iron core blocks to form stator and rotor iron core blocks, then performing annealing treatment, and finally performing segmented oblique-pole stacking on the stator and rotor iron core blocks to form the motor iron core.

Specifically, the section of the adopted polygonal roller is of a regular quadrilateral structure (as shown in fig. 9), and the roller of the regular quadrilateral structure is characterized in that the required roller is larger in volume and the consumed resources are larger due to the fact that the number of polygonal edges is too large; on the contrary, if the number of the polygonal roll sides is too small, the amount of the amorphous/nanocrystalline thin ribbon wasted will be increased sharply. The length of the single side of the quadrangle can be 140-280mm, the preferred side length is 120-220mm, and 200mm is selected in the embodiment. As shown in fig. 9, the roller comprises a rotating shaft, a regular quadrilateral roller body is arranged on the rotating shaft, clamping plates are respectively arranged at two ends of the roller body, a plurality of holes which are two by two and are symmetrically arranged along the center point of each clamping plate are arranged on each clamping plate, and the holes are weight-removing holes.

Because the amorphous thin belt is wound by the regular quadrilateral roller, the finally cut arc corner part is less, the strip is saved, and meanwhile, the curvature of the amorphous material wound on each layer is gradually increased, so that the thickness of the regular quadrilateral amorphous thick roll to be wound needs to be optimized, and the thickness selected in the embodiment is 50-53 mm.

Fig. 5 shows that the cylindrical motor stator and rotor are cut on the annular plate body, and the amorphous/nanocrystalline thin strip pieces are integrally cured by adhesive glue/insulating paint and the like, so that the cut stator and rotor core block can be connected with the motor spindle only by a stress-relief integral annealing process. The integral stress-relief annealing process needs to carry out heat treatment on the processed stator and rotor iron core block stack block, so that stress residue caused by the processing process is released as much as possible in the process, and the integral electromagnetic performance of the amorphous iron core block is further improved. The annealing process is preferably performed by using a protective gas to protect the entire annealing atmosphere, and the protective gas may be, but is not limited to, hydrogen, nitrogen, and inert gases, such as argon. In the annealing process, a magnetic field along the radial direction of the motor can be applied to the iron core lamination block, so that a 180-degree domain wall with better magnetic conductivity can be formed. The overall annealing process of the iron core block should control factors such as annealing temperature, heating rate, annealing time, magnetic field size and the like, and the change of the factors can influence the magnetic properties of the annealed amorphous/nanocrystalline iron core block. Wherein the selection range of the heating rate is 1-30 ℃/min, and the preferred heating rate is 12 ℃/min; the selection range of the annealing temperature is 110-580 ℃, preferably 350 ℃, 378 ℃ and 390 ℃; the annealing time is selected within the range of 0.5-4.5 hours, and the preferred annealing time is 90min and 150 min; the range of the applied magnetic field is 0-0.5T, the preferred values are 0T, 0.05T and 0.2T, and the direction of the magnetic field is along the radial direction of the iron core; and the annealing process of the magnetic field comprises the steps of firstly, preferably selecting argon as protective gas, placing the iron core in an atmosphere of 300-350 ℃, keeping the state for 15-30 min, then, adding a 0.05-0.5T magnetic field along the radial direction of the iron core, simultaneously, raising the atmosphere temperature to 350-400 ℃ at the speed of 1-15 ℃/min, keeping the temperature for 15-120min, then removing the external direct current magnetic field, standing the iron core, reducing the temperature to the room temperature at the same cooling speed, and separating from the protective gas atmosphere.

In conclusion, the invention changes the iron core manufacturing technology of the radial cylinder type amorphous motor, replaces the traditional laminating process by cutting the iron core blocks after winding and forming, greatly reduces the production cost of the cylinder type amorphous iron core, and has strong industrial popularization value.

It should be noted that many variations and modifications of the embodiments of the present invention fully described are possible and are not to be considered as limited to the specific examples of the above embodiments. The above examples are given by way of illustration of the invention and are not intended to limit the invention. In conclusion, the scope of the present invention shall include those alterations or substitutions and modifications which are obvious to those of ordinary skill in the art, and shall be subject to the appended claims.

Claims

1. A, sequentially laminating and winding amorphous or nanocrystalline thin strips on a polygonal roller after paint dipping and heating; b. the strip wound on the polygonal roller is solidified to form a closed annular plate body; c. the annular plate body is cut after being ejected out of the polygonal roller, and arc corner parts are cut off to form a plurality of rectangular iron core blocks; d. and performing cold cutting on the iron core blocks to form stator and rotor iron core blocks, then performing annealing treatment, and finally performing segmented oblique-pole stacking on the stator and rotor iron core blocks to form the motor iron core.

2. The manufacturing process of a radial flux cylinder type motor iron core according to claim 1, wherein in the step a, a paint dipping groove and a heating pipe are arranged, a first movable pulley and immersion liquid are arranged in the paint dipping groove, the immersion liquid immerses the first movable pulley, the heating pipe is of a hollow structure, a first fixed pulley and a second fixed pulley are arranged above the heating pipe, and the amorphous or nanocrystalline strip is wound on the polygonal roller after sequentially passing through the first movable pulley, the first fixed pulley and the second fixed pulley; and a paint scraping step is also arranged in the paint dipping and heating steps, and a paint scraper corresponding to the passing position of the strip is arranged between the heating pipe and the paint dipping tank.

3. The process for manufacturing a radial flux drum type motor core according to claim 2, wherein the paint scraper is a set of paint scraping plates symmetrically arranged along both sides of the strip material, and the distance between the two paint scraping plates is ± 1 to 3 μm, so that the thickness of the immersion liquid on the surface of the strip material is 1 to 3 μm; the heating temperature range of the heating pipe is 50-320 ℃.

4. The manufacturing process of the radial flux cylinder type motor iron core as claimed in claim 1, wherein in the step b, the tension generated by winding the strip material at the rotating speed of the polygonal roller is monitored by a tension meter, the tension meter is arranged between the roller and the strip material, the tension of the strip material at the rotating speed of the polygonal roller is controlled between 50N and 400N by the roller, so that the strip material is solidified, the rotating speed of the polygonal roller is 50-500 rpm, the lamination coefficient of the iron core block is selected to be in the range of 0.85-0.98, and the temperature field temperature range during solidification is 120-.

5. The process of claim 1, wherein in the step b, the pressure is applied along the normal direction of the surface of the annular plate wound on the polygonal roller to solidify the strip, the pressure is 1-20MPa, the strip with the immersion liquid attached thereto is formed by compression and solidification, the lamination factor is 0.85-0.98, and the temperature range of the temperature field when the pressure is applied is 120-.

6. The process according to claim 1, wherein in the step c, the annular plate body is cut into as large as possible core blocks by cold cutting, starting from the inner side wall of the annular plate body, and the cutting point is the intersection of the straight line of the inner side wall and the curved surface.

7. The manufacturing process of the radial flux drum type motor iron core according to claim 1, wherein in the step d, cover plates are arranged at two ends of the iron core block, the cover plates are made of a magnetic isolation material, an inert gas is adopted in an annealing process to protect an annealing atmosphere, the annealing temperature in the annealing process is selected to be in a range of 110 ℃ to 580 ℃, the annealing time in the annealing process is selected to be in a range of 0.5 to 4.5 hours, the heating rate is selected to be in a range of 1 ℃ to 30 ℃/min, a magnetic field along the radial direction of the motor can be applied to the iron core block in the annealing process, and the applied magnetic field is in a range of 0 to 0.5T.