JP2009032753A - Manufacturing method for electromagnetic steel laminated core - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new manufacturing technique which eliminates punching machining that invites cracking or breaking of a silicon-enriched electromagnetic steel plate, enables precise and free machining of a silicon-enriched electromagnetic steel plate reduced in strength by increasing silicon contents and lessening thickness into a desired shape, and enables manufacturing of a motor core having sufficient strength for practical use. <P>SOLUTION: According to a manufacturing method for an electromagnetic steel laminated core, a plurality of electromagnetic steel plates 1, 1... are joined together with respective insulating layers 11 set face to face, thus laminated and fixed temporarily (A) into an electromagnetic steel plate assembly 2. The part of the electromagnetic steel plate assembly 2 that is equivalent to one pair of opposed vertical sections 21 and 21 and the other pair of opposed vertical sections 22 and 22, which make up part of a core outline, are cut by laser, and the laser cut portion of the electromagnetic steel plate assembly 2 is melted together (B) to form a laminated electromagnetic steel plate block 3. One pair of opposed vertical sections 21 and 21 are ground (C), after which a caulking part 4 is wound around the ground opposed vertical sections 21 and 21 to fasten the steel plate block 3 together (D), and the other pair of opposed vertical sections 22 and 22 are ground (E). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

    The present invention has all fields related to electrical steel sheets as its technical field, and not only in the field of manufacturing electrical steel laminated cores, but also for transporting, storing, selling, using and producing electrical steel laminated cores. From the field of providing and selling necessary equipment and instruments, the field of providing materials, machinery and equipment, materials necessary for parts, such as wood, stone, various fibers, plastic, various metal materials, The field of electronic components incorporated in them, the field of control-related equipment that integrates them, the field of various measuring instruments, the field of power equipment that moves the equipment and equipment, the field of electricity and energy that is the energy and energy source, etc. Fields generally referred to as industrial machinery, as well as testing and researching those facilities and equipment, fields related to display, sales, import / export, generals, In addition to the results of their use, the equipment used to build them, the fields related to the collection and transportation of garbage generated by the operation of equipment, the recycling field for efficiently reusing these wastes, etc. There are no new technical fields that cannot be envisaged, and there are no unrelated technical fields.

(Points of interest)
In recent years, electric vehicles and hybrid vehicles have attracted attention as technologies for solving environmental problems such as air pollution, global warming, and noise caused by automobiles. In-wheel type drive motors and batteries with long cruising distance, light weight and short charging time are being actively developed.

Under such circumstances, thin laminated electrical steel sheets used for reluctance motors, induction motors, and other motors that are small and light, yet have high output, have the property of causing iron loss (energy loss) when AC magnetized. In view of the fact that the iron loss can be reduced as the plate thickness is reduced, a production technology for an electromagnetic steel sheet that is thinner than the conventional product is required.
In addition, magnetic steel sheets tend to have a lower magnetic flux density as they become thinner. To improve this phenomenon and improve motor performance, in 1889 the British Hadfield found that iron. When silicon is added, the electrical resistance is increased and the effect of lowering the iron loss is obtained. By utilizing the property that magnetostriction and crystal anisotropy energy are reduced up to a silicon content of 6.5%, the crystal orientation is controlled. The development of a technique for increasing the saturation magnetic flux density and increasing the electric resistance by adding silicon is being actively promoted.

(Conventional technology)
As an example of prior art relating to these, as proposed in Japanese Patent Application Laid-Open No. 5-287383 “Method for producing ultra-high silicon electrical steel sheet”, C ≦ 0.006% by weight, Si: 5.0˜ 7.1%, Mn: 0.07 to 0.30%, S ≦ 0.007%, acid-soluble Al: 0.006 to 0.038%, total N: 8 to 30 ppm, balance Fe and unavoidable impurities The material is heated to a temperature range of more than 1100 ° C. and not more than 1250 ° C. and subjected to rough hot rolling applying a rolling reduction of 15 to 40% to introduce strain, and then the temperature range of more than 1100 ° C. and not more than 1250 ° C. Ultra-high silicon that is subjected to finish rolling after reheating to, then cold-rolled at a temperature range of 120 to 350 ° C. to obtain the final thickness, and then annealed for recrystallization and grain growth Magnetic properties by the manufacturing method of electrical steel sheet In particular, ultra-high silicon steel (steel containing 6.5% or near Si) with excellent iron loss characteristics in the high frequency region, hot-rolled and cold-rolled plates, ear cracks (edge cracks), As a result, a technique capable of providing a process that can be cold-rolled to a thickness of 0.23 mm at a plate temperature of 180 ° C. without causing material breakage, or disclosed in JP 2003-160848 A As in the “high silicon electrical steel sheet and manufacturing method thereof” Si content is 5 wt% or more and 7 wt% or less, Cr content is 0.1 wt% or more and 2 wt% or less, and Al content is 0.005. High silicon electrical steel sheet having a low iron loss characteristic at a high frequency while maintaining a high magnetic permeability characteristic, and having a through grain structure in a thickness direction of less than 0.3% by weight, having a thickness of 0.3 mm or less, and a method for producing the same Technology that has made it possible to provide It is.

    Even in the case of manufacturing motor cores using thin high-silicon electromagnetic steel sheets produced by introducing such new technology, it is still in various processing stages from stamping to stacking and integration. However, the high silicon electrical steel sheet is prone to cracking and chipping, has a defect that the yield rate is low and cannot be produced efficiently. In addition, the manufacturing of such motor cores depends on the motor shape and dimensions of different models. Each die for punching high silicon electromagnetic steel sheets must be manufactured individually, which increases the economic burden, and further, during the assembly process of the three-dimensional core, a plurality of high silicon electromagnetic plates after punching are processed. Even in the process of combining steel sheets in a laminated form, there is a high risk of cracking or chipping in high-silicon electrical steel sheets due to contact with other objects during transportation and handling, resulting in high defect rates and high production costs. Had become a thing to leave a drawback say.

    As a technique for solving such a problem, for example, as disclosed in Japanese Patent Application Laid-Open No. 2001-295000 “High Silicon Electrical Steel Sheet Excellent in Assembly Workability”, a core using a high silicon electrical steel sheet manufactured by a rolling method is used. The cause of the breakage of the steel sheet that occurs when assembling the steel sheet is due to the poor slipperiness of the high silicon steel sheet, and in order to improve the slipperiness, the steel sheet surface roughness and the insulation film thickness are within a specific range. Found to be effective to regulate, developed to eliminate these causes, forming an insulating film on the surface of high silicon steel sheet with Si content of 4-7 mass% produced by rolling method A high silicon electrical steel sheet having a surface roughness Ra of 0.10 μm or more and an average thickness of the insulating film of 2 μm or less, which causes breakage during core assembly. Therefore, it is possible to obtain an effect that the productivity of the core is remarkably improved as compared with the conventional high silicon steel sheet, and Japanese Patent Laid-Open No. 11-234972 “Laminated iron core” As shown in the invention, a high-frequency structure composed of a high-frequency absorber and a support simultaneously with pressurization after processing and laminating a magnetic steel sheet with a surface coated with an adhesive coating into a unit iron core shape By contacting the absorber and applying high frequency to heat the high frequency absorber and heating the iron core with the heat energy, the iron core is integrated with inexpensive equipment, greatly improving the iron core fixing workability. It is possible to quickly fix laminated iron cores with inexpensive equipment using electrical steel sheets with adhesive coating, and it is not fixing with conventional heating furnaces, so electrical steel sheets with adhesive coating are fixed in a short time Yes, iron core sticking Etc. are scattered those degree of workability is to be greatly improved.

    However, the former “high silicon electrical steel sheet excellent in assembly workability” invention has a surface roughness Ra of the high silicon electrical steel sheet (insulating film surface) of 0.10 μm or more and an average thickness of the insulating film of 2 μm. The high silicon electromagnetic steel that has already been produced and the surface roughness Ra of the high silicon electromagnetic steel sheet (insulating film surface) is less than 0.10 μm or the average thickness of the insulating film exceeds 2 μm. Steel plates cannot be used, and there are disadvantages that a wide range of materials in the market, cost reduction by procurement, and the effect cannot be enjoyed.

In addition, the latter “method for producing a laminated iron core” includes a non-oriented electrical steel sheet having an epoxy resin on the surface and an insulating coating having an adhesive ability applied to each side by 8 μm. The motor core material punched and laminated into a unit core shape is sandwiched between a bakelite plate with a thickness of 2 mm as a high-frequency absorber and a steel plate with a thickness of 5 mm as a support, and the upper and lower supports are connected with bolts as a whole. After that, it was set in the heating part of an oven type microwave heating device with an output of 600 kW, heated for 3 minutes, and the laminated iron core was integrated, and there was no occurrence of cracking or peeling, and sufficient adhesive strength was obtained. However, punching into a unit core shape of the motor core so that the silicon content exceeds 4.0 wt% and the high silicon electrical steel sheet with a thickness of 0.1 mm or less will not crack or break. Technology No description is Te, just the technique disclosed in the present invention, had the disadvantage of producing a core for a motor using a high silicon electrical steel sheet thin it is not possible.
(1) JP-A-5-287383 (2) JP-A-2003-160848 (3) JP-A-2001-295000 (4) JP-A-11-234972

(Awareness of problems)
Including the cases mentioned above, various manufacturing technologies related to high silicon electrical steel sheets have been proposed so far, and certainly many of them increase the silicon content of high silicon electrical steel sheets and reduce iron loss. However, most of these technologies cover the details of any manufacturing process that can be added with silicon and other components, and can be melted, heat treated and rolled. In addition, advanced press working technology that punches into the unit core shape of the motor core so as not to break or break the high silicon electrical steel sheet with the plate thickness set to 0.1 mm or less before the laminated iron core is integrated In order to solve these problems, high silicon electrical steel sheets with excellent punching strength must be used, but production using such advanced manufacturing technology is costly and inexpensive. The difficult, in fact, has a situation that must use the magnetic steel sheets are widely supplied to the market as the silicon content of about 3.2 wt% sufficiently withstand even pressing.

(Object of invention)
Therefore, the present invention eliminates the punching process that causes cracking and fracture of the high-silicon electrical steel sheet, and allows the high-silicon electrical steel sheet whose strength is reduced by increasing the silicon content and reducing the thickness to a desired shape with high accuracy and freedom. Judging whether it is possible to develop a new manufacturing technology that can produce a motor core that can be processed and that has sufficient strength to withstand practical use, we quickly started its development and research, and conducted a long-term trial. As a result of repeating mistakes and many trial manufactures and experiments, this time, we finally succeeded in realizing a new method for manufacturing laminated steel cores. The configuration will be described in detail with an example.

(Structure of the invention)
As clearly understood from the embodiments representing the present invention shown in the drawings, the method for manufacturing an electromagnetic steel laminated core according to the present invention basically includes the following configuration.
That is, a plurality of electromagnetic steel sheets set to a predetermined thickness having a flat surface or a curved surface are crossed over the stacking surfaces of the electromagnetic steel sheets in an assembly of magnetic steel sheets temporarily laminated and fixed so as to be joined together with each other's electrical insulation layers. A laminated electrical steel sheet block is formed by laser-cutting at least a part of the core contour corresponding to the opposite side of the core contour and a portion corresponding to the opposite side of the core contour corresponding to the laser cutting at the same time, and at the same time melt-bonding the respective cut surfaces. After polishing one of the four melt-bonded butt faces, the caulking part is passed around the center of the ground side of the polished potato so that the caulking part is passed through and firmly integrated. This is a method for producing an electromagnetic steel laminated core having the gist of polishing the remaining anti-waist face and other necessary face surfaces.

    When this basic configuration is shown as a more concrete one, a plurality of electromagnetic steel sheets having a plane or curved surface set to a thickness of less than 0.1 mm are laminated and temporarily fixed so that the respective electrical insulating layers are bonded to each other. In the electromagnetic steel sheet assembly, the opposite side of the opposite edge that forms at least a part of the core contour that intersects with the stacking surface of each electromagnetic steel sheet, and the opposite part of the opposite side of the core that forms the other part of the core outline are arbitrarily shaped. At the same time as laser cutting, each cut surface is melt-bonded to form a laminated electrical steel steel steel block, and one of the four bonded ends is polished and then the center of the polished wafer is opposite A method for producing an electromagnetic steel laminated core comprising a structure in which a caulking part is passed in the vicinity so as to be tightly integrated and polished, and the remaining anti-waist face and other necessary grind face are polished. .

    In other words, the silicon content is regulated to 4.0 to 7.0% by weight, preferably 6.5% by weight, and a plurality of planes or curved surfaces having a thickness of less than 0.1 mm are set. An assembly of electrical steel sheets laminated and temporarily fixed so that two electrical steel sheets are joined together with each other's electrical insulation layers. The part corresponding to the opposite end of the core, which forms the other part of the core contour, is laser-cut into an arbitrary shape, and at the same time, each cut surface is melt-bonded to form a laminated electrical steel sheet block. After polishing the front face of the wood facing the wood, it is tightly integrated by passing the caulking part around the center of the ground side of the polished wood, and the remaining face of the wood facing the other side and other necessary wood face Polishing A method of manufacturing electrical steel laminated core having the structure in which the so that.

    As described above, according to the method for manufacturing an electromagnetic steel laminated core according to the present invention, laminated temporary fixing is performed so that a plurality of electromagnetic steel sheets set to a predetermined thickness having a flat surface or a curved surface are joined to each other by electrical insulating layers. Compared to the case of handling every single electromagnetic steel sheet up to now, it is possible to significantly reduce the occurrence of chipping and cracking, and at least cross over the stacking surface of each electromagnetic steel sheet A laminated electrical steel sheet block is formed by laser-cutting the anti-cutting mouth part that forms part of the core outline and the equivalent part of the anti-cutting mouth part that forms another part of the core outline, respectively, while simultaneously cutting each section into a melt. In addition, each magnetic steel sheet can be integrated into a single block and positioned to increase the processing accuracy, while ensuring high strength to withstand inadvertent drops and interference with other objects. , Of the laminated magnetic steel sheet block, at least four of the fused ends, one of the opposite ends is polished to ensure the prevention of cracks and chips The electrical steel sheet ends of the parts can be re-isolated into an electrical insulation state and precision finished at the same time, and then tightly integrated by winding the caulking parts to pass near the center of the ground surface of the polished saw. Then, processing was continued to polish the remaining anti-waist face and other necessary polish face surfaces, and the thickness was around 0.1 mm, silicon content was 4.0% by weight, which was conventionally considered to be very difficult to process. In addition, it is possible to mass-produce an electromagnetic steel laminated core made of 7.0% by weight high-silicon electrical steel sheets with high accuracy, efficiency, good yield and low cost, and it is sufficient to prepare a laser processing apparatus and a polishing apparatus. Economy that can be easily produced in a small number of factories with small facilities, without requiring large capital investment in the production and maintenance of molds. It is possible to provide manufacturing technology that is remarkably superior in nature.

    In addition, as a material to be used, a plurality of electromagnetic steel sheets set to a thickness of less than 0.1 mm having a flat or curved surface is used, the generation of iron loss can be greatly reduced and the generated magnetic force is enhanced, In addition to being able to further reduce the size and weight of electromagnetic steel laminated cores, the use of laser processing eliminates all of the negative effects of brittleness, which is the biggest disadvantage of high-silicon thin electromagnetic steel sheets, and the resulting increase in defect rate. In addition, a processing accuracy equal to or higher than that of press processing can be obtained, and a great effect can be achieved in that a motor core having a much more complicated shape than that of a conventional product can be efficiently manufactured.

    In addition, a plurality of electromagnetic steel sheets having a flat or curved surface and a thickness of less than 0.1 mm are used, with the silicon content being regulated to 4.0 wt% to 7.0 wt%, preferably 6.5 wt%. It is possible to provide an electromagnetic steel laminated core that enables mass production of small, high-efficiency and high-power motors and other electrical products that are completely impossible with conventional press working. Benefits are gained.

    Furthermore, when a plurality of electromagnetic steel sheets are laminated and temporarily fixed via each other's electrical insulating crystal grain boundaries to form an electromagnetic steel sheet aggregate, laser cutting is performed. The process of forming or interposing an insulating layer is no longer necessary, reducing the thickness of the electromagnetic steel laminated core, further reducing the size and weight and increasing the efficiency, and also greatly reducing the number of manufacturing steps and costs. can get.

    Either at least one surface or a part of the portion corresponding to the front surface of the laminated electromagnetic steel sheet block is either a predetermined angle less than 90 degrees or a predetermined angle exceeding 90 degrees with respect to the stacking surface of each electromagnetic steel sheet If it is based on three-dimensional processing that cuts into a surface shape inclined at an angle of, it becomes possible to efficiently produce electromagnetic steel laminated cores with more complex shapes, It becomes possible to provide a large number of electromagnetic steel laminated cores using a complex-shaped high silicon electromagnetic steel sheet, which has a high defect rate and a high price, at a low price.

    In addition, when three-dimensional processing is performed by cutting at least one surface or a part of the laminated magnetic steel sheet block corresponding to the laminated mouthpiece surface into a bent straight line and / or curved line, until now. High-silicon electrical steel sheets that can achieve three-dimensional processing that was completely impossible with the manufacturing method in which each electrical steel sheet before lamination is pressed and then laminated and integrated. It is possible to exhibit the excellent effect that the used electromagnetic steel laminated core can be produced with extremely high efficiency and high yield rate.

In implementing the present invention having the configuration as described above, the best or desirable mode will be described.
Electrical steel sheets are steel sheets that efficiently exchange electrical and magnetic energy. In other words, large or small rotating machines, general-purpose motors, small precision motors, motors for electric vehicles, various generators, and various power transformers. It is used for the manufacture of distribution transformers, magnetic amplifiers, magnet switches, ballasts, magnetic shields, etc., and can be formed in a flat or curved shape, and features of the present invention As a high silicon electrical steel sheet, which is thinner than the plate thickness of 0.3 mm, which has already been put to practical use, and has a silicon content higher than 4.0% by weight, it is much higher than the conventional type. The thickness should be less than 0.1 mm, 4.0 wt% to 7.0 wt%, preferably 6.5 wt. It is desirable to those regulating the silicon content amounts%.

    The electrical insulation layer is located between the surfaces of the electrical steel sheets to be joined to each other, and serves to insulate the electrical steel sheets from each other so that no current flows between the joint surfaces. At least one layer must be formed between them, and an independent sheet-like insulating layer can be interposed between the magnetic steel sheet joint surfaces, as shown in the examples described later, Those consisting of an electrically insulating vapor-deposited layer, plating layer, oxide film layer, etc. formed on either the front or back both sides or either one of the front and back sides, or those consisting of an insulating resin film layer or paint coating layer, etc. The electrical insulating crystal grain boundary of each electromagnetic steel sheet itself can be used as an electrical insulating layer.

    The electrical steel sheet assembly is formed by stacking and temporarily fixing a plurality of electromagnetic steel sheets so that the respective electrical insulating layers are joined to each other, and the plurality of electromagnetic steel sheets do not easily shift or drop off. As shown in the examples described later, special clamping jigs, various vises, clips, etc., must be clamped or held securely during laser cutting. It is desirable that it is temporarily fixed by using a shaped holder.

    A laminated electrical steel sheet block is obtained by laser-cutting important portions of an electrical steel sheet assembly and at the same time melt-bonding each cut surface and integrating them into a block shape. Simultaneously laser-cutting the opposite side of the body, which is at least a part of the core contour crossing the stacking surface of each electromagnetic steel sheet, and the part of the body corresponding to the opposite side of the core, which is another part of the core contour, respectively. Each cut surface is melt-bonded.

    Laser cutting is a process that cuts a laminated electrical steel sheet block, which is a material of an electrical steel laminated core, from an assembly of electrical steel sheets with high precision without the need for pressing, and each electromagnetic that is exposed on the cut surface. It serves to make it possible to fuse and integrate ends adjacent to each other in the form of lamination of steel sheets, and to cut a plurality of electromagnetic steel sheets stacked in a lamination form in a longitudinal direction in the lamination direction. Using a laser processing device that can provide a sufficient output, the electrical steel sheet assembly to be laser processed is cut and melt-bonded as the electrical steel sheets are intimately joined together with appropriate jigs or fastening tools. As shown in the embodiments to be described later, at least one surface or a part of the laminated electrical steel sheet block facing the wooden floor is attached to the stacking surface of the electrical steel sheets. It is possible to perform three-dimensional processing by cutting into a surface shape inclined at either a predetermined angle of less than 90 degrees or a predetermined angle exceeding 90 degrees. It is possible to perform a three-dimensional process that cuts at least one surface or a part thereof into a bent straight line and / or a curved line.

    In the polishing process, the corresponding edge of each electrical steel sheet is separated at the same time by polishing one of the cut end surfaces of at least four ends of the cut surfaces that are melt-bonded simultaneously with laser cutting. A step of polishing and finishing to a desired edge shape, and after polishing one of the opposite end surfaces of at least four ends of the laminated electromagnetic steel sheet block, the caulking parts are mounted, and the remaining opposite end surface and Other polishing must be followed by the procedure of polishing the surface of the end, various abrasives such as silicon points, silicon wheels, grindstones and grinders, abrasives, and various abrasives and abrasives such as various compounds and abrasive liquids. It is important to carefully finish to the required accuracy so as not to cause chipping, cracking, cracking, etc. in the magnetic steel sheet with a polishing machine or grinding machine that uses an agent. .

The caulking part can firmly and surely maintain the integrated state of the completed electromagnetic steel laminated core, and in the manufacturing process, in one of at least four end surfaces of the laminated electromagnetic steel sheet block that are fusion bonded. After polishing the surface of the wood head, it is possible to prevent the magnetic steel sheets from being inadvertently dropped or separated during transportation and handling until the next process, and an integrated block that maintains the exact positional relationship. A function to enable reinforcement and maintenance of the state is achieved, and after polishing one of the opposite wood head surfaces, the laminated electrical steel sheet block is strengthened until polishing of the remaining anti-wood surface and other necessary wood surfaces is completed. It should be able to be held in an integrated manner, and is preferably made of a metal or synthetic resin that has electrical insulation and no magnetism, and is intended for insulation and rust prevention. The coating can be made which has been subjected to was.
In the following, the structure of the present invention will be described in detail together with an embodiment representative of the present invention shown in the drawings.

    1 is a flowchart of a method of manufacturing the electromagnetic steel laminate core, FIG. 2 is a perspective view of a plurality of electromagnetic steel plates to be laminated, FIG. 3 is a perspective view of an electromagnetic steel plate assembly to be laser-cut, and a laser perpendicular to the laminate surface of FIG. 5 is a side view of an electromagnetic steel plate to be cut, a side view of an electromagnetic steel plate to be laser-cut at a predetermined angle on the laminated surface of FIG. 5, and an electromagnetic steel plate which is made of a curved-shape electromagnetic steel plate of FIG. A side view of the assembly, a side view of an electromagnetic steel sheet assembly that performs three-dimensional laser cutting in a direction perpendicular to the laminated surface in FIG. 7, and a three-dimensional laser cutting in a direction having a predetermined angle on the laminated surface in FIG. FIG. 9 is a side view of a magnetic steel sheet assembly to be performed, a side view of a curved surface magnetic steel sheet assembly subjected to three-dimensional laser cutting in FIG. One side of 11 12 is a perspective view of the laminated electromagnetic steel sheet block after polishing, a perspective view of the laminated electromagnetic steel sheet block having the caulking parts shown in FIG. 12 mounted thereon, and a perspective view of the electromagnetic steel laminated core completed by polishing the remaining face of the opposite wood in FIG. FIG. 1 shows a typical laminated electrical steel sheet included in the present invention.

    In the example shown here, a plurality of electrical steel sheets 1, 1,... Set to a predetermined thickness having a flat or curved surface are laminated and temporarily fixed A so as to join the electrical insulating layers 11 to each other. In the assembly 2, the opposite wood mouth surfaces 21, 21 forming at least a part of the core contour intersecting the stacked surfaces of the electromagnetic steel plates 1, 1,..., And the opposite wood mouth surface 22 constituting the other part of the core contour. , 22 are respectively laser-cut into arbitrary shapes, and at the same time, the respective cut sections 21, 21, 22, 22 are melt-bonded B to form a laminated electrical steel sheet block 3, and these four melt-bonded end surfaces 21 are obtained. , 21, 22, 22, one of the opposite wood mouth surfaces 21, 21 is polished C, and then wound around the center of the polished bamboo opposite wood mouth surfaces 21, 21 so as to pass the caulking part 4 firmly D integrated into the residue It was opposed end grain surface, and the 22, 22 and other relevant polished cut end surface of such polishing E, an embodiment representative of the manufacturing method of the electromagnetic steel laminated core of the present invention.

    The electromagnetic steel laminated core manufacturing method is performed in accordance with the work procedure shown in FIG. 1, and as shown in FIG. 2, it is a flat plate having a thickness of less than 0.1 mm, and is either front or back or front and back. Whether to form an electrically insulating layer 11 consisting of an electrically insulating coating layer by vapor deposition, spray coating, plating, oxide coating, or the like, or to form an electrically insulating grain boundary 12 As shown by the solid arrows in FIG. 2, a plurality of sheets of electromagnetic steel sheets 1, 1,... The magnetic steel sheet aggregate 2 is formed as shown by A in FIG.

    As shown in FIG. 1B and FIG. 3, a rectangular box-shaped core face 21 having a rectangular box-shaped core crossing perpendicularly to the stacking surfaces of the electromagnetic steel sheets 1, 1,. At the same time, the laser beam L is continuously irradiated and cut so as to follow the alternate long and short dash lines shown in FIG. The adjacent edges of the laminated steel sheets 1, 1,... Exposed in the cut surfaces 21, 21, 22, 22 are melt-bonded to each other, and the laminated electromagnetic steel sheet block 3 as shown in FIG. To be integrated.

As shown in FIG. 4, the cutting with the laser beam L is performed on at least one surface or a part of each of the facing wooden face surfaces 21, 22, 22, 22 of the laminated electromagnetic steel plate block 3. In addition to processing so as to be orthogonal to the stacking surface of ..., as shown in FIG. 5, the predetermined angle of less than 90 degrees or 90 degrees with respect to the stacking surface of each electromagnetic steel sheet 1, 1, ... It is possible to use three-dimensional processing that cuts into a surface shape that is inclined at any one of the predetermined angles that exceeds.
Further, as shown in FIG. 6, at least one surface or a part of the facing wooden front surfaces 21, 21, 22, 22 of the laminated electromagnetic steel plate block 3 made of curved plate-shaped electromagnetic steel plates 1, 1,. It may be cut into a straight line passing through the center of curvature.
Furthermore, as shown in FIG. 7 to FIG. 9, at least one or a part of the laminated front end surfaces 21, 21, 22, 22 of the laminated electromagnetic steel sheet block 3 is bent linearly and / or curved. It can also be a three-dimensional process of cutting into various shapes such as a shape.

    As shown in FIG. 3, the laminated electrical steel sheet block 3 formed into a rectangular box shape by laser cutting and melt-bonding each of the opposite wood face surfaces 21, 22, 22, 22 is shown in C in FIG. 1 and FIG. 10. As shown, it is securely held using a dedicated jig G that can be positioned and fixed with high precision, or other precision clamping tools, etc. One of the opposite wood facets 21 and 21 is sequentially attached to a polishing apparatus using a silicon point, a silicon wheel, or other abrasives or abrasives to perform precision polishing.

    As shown in FIG. 11, the laminated layers exposed so as to polish one of the opposite wood end surfaces 21, 21 and electrically separate the corresponding edges of the electromagnetic steel plates 1, 1,. As shown in FIG. 1D and FIG. 12, the electromagnetic steel sheet block 3 is made of an electrically insulating nonmagnetic material, for example, an aluminum alloy, a copper alloy, a nonmagnetic stainless alloy, a titanium alloy coated with an electrically insulating film, A caulking part 4 made of a non-magnetic metal such as a magnesium alloy is wound so as to pass near the center of the ground surfaces 21 and 21 of the polished wood, and is firmly integrated. Further, in E in FIG. 1 and FIG. As shown, it is possible to obtain the electromagnetic steel laminated core 5 set to have a desired shape and size by grinding the remaining anti-wood face 22 and 22 in the same manner.

(Operation of Example)
In the method for manufacturing an electromagnetic steel laminated core of the present invention having the above-described configuration, the silicon content is regulated to 6.5% by weight as shown in A of FIG. 1 and FIG. A plurality of flat magnetic steel sheets 1, 1,... Set to be less than 1 mm are temporarily fixed in a stacked manner so as to join the electrical insulating layers 11 or the electrically insulating crystal grain boundaries 12 to each other in FIG. 1 is formed, the bonding work between the electromagnetic steel sheets 1, 1,... Is omitted, and as shown in FIG. 1B and FIG. The rectangular box-shaped core contour facing surfaces 21 and 21 orthogonal to the stacking surfaces of the steel plates 1, 1,... And the portions corresponding to the facing wooden front surfaces 22 and 22 forming the other part of the core contour are arbitrarily shaped. The laminated electromagnetics are made by melting and bonding the respective cut surfaces 21, 21, 22, 22 at the same time as laser cutting. A plate block 3.
Further, as shown in FIGS. 4 to 6, the cutting with the laser enables the formation of the opposite side surfaces 21, 21,..., 22, 22,. Thus, three-dimensional processing of complicated angular shapes is also possible.

    As shown in FIG. 1C and FIG. 10 and FIG. 11, among the four melt-bonded lug surfaces 21, 21, 22, and 2, one of the lug surfaces 21 and 21 that are most suitable for mounting the caulking part 4 is provided. Polishing is performed with an abrasive such as a silicon point or an abrasive, and the caulking part 4 is wound around the center of the polished wood 21 and 21 as shown in D and FIG. When firmly integrated, the box-shaped shape of the laminated electrical steel sheet block 3 and the positional relationship between the electrical steel sheets 1, 1,... Are not lost, as shown in E in FIG. The opposite lug surfaces 22 and 22 can be polished to complete the electromagnetic steel laminated core 5.

(Effect of Example)
In addition to the features described in the section of the effect of the present invention, the manufacturing method of the electromagnetic steel laminated core of the embodiment having the above-described configuration includes laser cutting as shown in FIG. 1C and FIG. In addition, the laminated electrical steel sheet block 3 formed into a rectangular box shape by fusion bonding is firmly attached to a dedicated jig G that can be positioned and fixed with high accuracy and polished. , ... are surely prevented from occurring, cracks, cracks, chips, dropouts, etc., and one of the opposite surfaces 21, 21 (polishing surface 21) that has been polished first is used as the processing reference surface. On the other hand, it is possible to efficiently perform precision polishing by polishing the other side of the opposite side (the end face 21). , Combination bonding work etc. From the complex steel sheets 1, 1,..., Which are easily damaged, to the previous steps, from the electromagnetic steel sheets 1, 1,. This laminated electrical steel sheet has a structure in which the opposite lug surfaces 21, 21, 22, and 22 that are most likely to be chipped and cracked are continuously integrated into a single wall surface by fusion bonding. Even if the block 3 is transported in the factory or mounted on a machine tool, even if it comes into contact with other objects, the magnetic steel sheets 1, 1,. The effect of preventing the occurrence can be expected.

    In addition, a clearance groove (not shown) that can avoid interference with the caulking part 4 is provided at a position corresponding to the caulking part 4 shown in FIG. 12 on the clamping surface of the dedicated jig G shown in FIG. As shown in FIG. 1 D and FIG. 12, the laminated electrical steel sheet block 3 after the caulking component 4 is mounted can be accurately positioned and temporarily fixed using the engraved jig. , 22 can be efficiently and accurately polished.

(Conclusion)
As described above, the method for manufacturing an electromagnetic steel laminated core according to the present invention makes it possible to achieve the intended purpose uniformly by its novel configuration, and the manufacturing process is simple and cut by conventional press working. Compared to a manufacturing method in which a plurality of electromagnetic steel sheets are bonded and fixed in a laminated form, it is possible to reduce the thickness and increase the silicon content of the used electromagnetic steel sheet, and can greatly promote the reduction in size and weight of the core. Moreover, it is possible to make the core of various shapes freely and with high precision by laser cutting, and it is possible to make a much more economical by eliminating the need for a mold with a large economic burden. However, since complex cores can be produced efficiently and inexpensively, not only small and medium-sized electrical component factories that are difficult to invest at high cost, but also the economics of high-performance cores. It is highly appreciated by the automobile industry, electronic parts industry, consumer electronics industry, etc. that want to produce, and also by general companies and ordinary households who want high-efficiency industrial products using it. It is expected to go.

The drawings show typical embodiments embodying the technical idea of the method for manufacturing an electromagnetic steel laminated core according to the present invention.
It is a flowchart which shows the manufacturing method of an electromagnetic steel laminated core. It is a perspective view which shows the combination process of an electromagnetic steel plate assembly. It is a perspective view which shows a laser cutting process. It is a side view which shows the linear laser cutting orthogonal to a lamination surface. It is a side view which shows the linear laser cutting which cross | intersects a laminated surface at a predetermined angle. It is a side view which shows the linear laser cutting of a curved-surface-shaped electromagnetic steel plate aggregate. It is a side view which shows the three-dimensional laser cutting orthogonal to a lamination surface. It is a side view which shows the three-dimensional laser cutting which cross | intersects a laminated surface at a predetermined angle. It is a side view which shows the three-dimensional laser cutting of a curved-surface-shaped electromagnetic steel plate aggregate. It is a perspective view which shows the laminated electromagnetic steel plate block with which the jig | tool was mounted | worn. It is a perspective view which shows the lamination | stacking electromagnetic steel plate block which grind | polished one antique wooden mouth surface. It is a perspective view which shows the lamination | stacking electromagnetic steel plate block which mounted | wore with the crimping | crimped part. It is a perspective view which shows the completed electromagnetic steel laminated core.

Explanation of symbols

A Assembly process of magnetic steel sheet assembly B Cutting and fusion bonding process of laminated magnetic steel sheet block C Polishing process of the face of the lumber end D Mounting process of caulking parts E Polishing process of the remaining face of the lumber end face L Laser light G Dedicated jig 1 Electrical steel sheet
11 Same electrical insulation layer
12 Electrically insulating grain boundaries 2 Electrical steel sheet aggregate
21 Same side
22 Others Anti-Wood Faucet 3 Laminated Electrical Steel Sheet Block 4 Caulking Parts 5 Electrical Steel Laminated Core

Claims (6)

    At least a core that intersects a stacking surface of each electromagnetic steel plate of a magnetic steel plate assembly in which a plurality of electromagnetic steel plates set to a predetermined thickness having a flat surface or a curved surface are laminated and temporarily fixed so as to be joined to each other by electrical insulation layers. Laser-cutting the anti-cutting lumber face that forms part of the contour and the anti-fogging lumber face that forms the other part of the core outline, respectively, at the same time laser cutting into an arbitrary shape, and simultaneously melting and bonding the cut sections to form a laminated electrical steel sheet block. After polishing one of the four melt-bonded lumber surfaces, the caulking part is passed around the center of the ground surface of the opposite side of the polished glue so that it is firmly integrated. A method for producing an electromagnetic steel laminated core, characterized in that the anti-glazed face and other surfaces requiring polishing are polished.     Crossing on the stacking surface of each electromagnetic steel plate of a set of electromagnetic steel plates that are laminated and temporarily fixed so that a plurality of electromagnetic steel plates having a thickness of less than 0.1 mm having a flat surface or curved surface are joined to each other by electrical insulation layers. Laminated electrical steel sheet block that cuts at least a part of the core profile corresponding to the core contour and a portion corresponding to the counter part of the core profile corresponding to the opposite side of the core by laser cutting into arbitrary shapes at the same time. After polishing one of the four melt-bonded lumber surfaces, it is tightly integrated by winding the caulking part around the center of the ground surface of the grapple A method for producing an electromagnetic steel laminated core, characterized in that the remaining anti-waist face and other polished face surfaces are polished.     A plurality of electrical steel sheets, each having a silicon content of 4.0% to 7.0% by weight, preferably 6.5% by weight and having a flat or curved surface and a thickness of less than 0.1 mm, are connected to each other. An assembly of electrical steel sheets laminated and temporarily fixed so as to be joined together by electrically insulating layers, at least a part of the core contour crossing the stacking surface of each electrical steel sheet, and another part of the core contour Each part corresponding to the opposite wood mouth is made by laser cutting into an arbitrary shape, and at the same time, each cut surface is melt-bonded to form a laminated electrical steel steel block, and one of these four heat-bonded wood ends is polished. After that, the caulking part is wound around the center of the ground side of the polished bamboo so that the caulking part is passed and firmly integrated, and the remaining surface of the opposite side and other necessary ground surfaces are polished. Features and Method for manufacturing electrical steel laminated core that.     The electromagnetic sheet according to any one of claims 1 to 3, wherein the plurality of electromagnetic steel sheets are made of an electromagnetic steel sheet aggregate that is laminated and fixed temporarily via electrical insulating crystal grain boundaries and then cut by laser. Manufacturing method of steel laminated core.     The laminated electromagnetic steel sheet block has at least one surface or a part thereof in the portion corresponding to the surface of the opposite wood mouth, whether it is a predetermined angle of less than 90 degrees or a predetermined angle exceeding 90 degrees with respect to the stacking surface of each electromagnetic steel sheet. The manufacturing method of the electromagnetic steel laminated core as described in any one of Claims 1 thru | or 4 which was based on the three-dimensional process cut | judged to the surface shape inclined in any angle.     The laminated electromagnetic steel sheet block is formed by three-dimensional processing in which at least one surface or a part thereof in the portion corresponding to the laminated mouth end surface is bent into a straight line and / or a curved line. The manufacturing method of the electromagnetic steel laminated core as described in any one of Claims.

Images