WO2018016475A1 - コア板の製造方法 - Google Patents
コア板の製造方法 Download PDFInfo
- Publication number
- WO2018016475A1 WO2018016475A1 PCT/JP2017/025915 JP2017025915W WO2018016475A1 WO 2018016475 A1 WO2018016475 A1 WO 2018016475A1 JP 2017025915 W JP2017025915 W JP 2017025915W WO 2018016475 A1 WO2018016475 A1 WO 2018016475A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- core back
- core
- back portion
- strain
- easy magnetization
- Prior art date
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/08—Bending by altering the thickness of part of the cross-section of the work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/20—Bending sheet metal, not otherwise provided for
- B21D11/203—Round bending
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/16—Making other particular articles rings, e.g. barrel hoops
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D10/00—Modifying the physical properties by methods other than heat treatment or deformation
- C21D10/005—Modifying the physical properties by methods other than heat treatment or deformation by laser shock processing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
- C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1272—Final recrystallisation annealing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0233—Manufacturing of magnetic circuits made from sheets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2221/00—Treating localised areas of an article
- C21D2221/02—Edge parts
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2261/00—Machining or cutting being involved
Definitions
- the present disclosure relates to a method of manufacturing a core plate having an annular core back portion and a plurality of teeth portions extending from the core back portion toward the center.
- a rotating electrical machine such as a generator or a motor uses a stator core in which a plurality of annular core plates each having an annular core back portion and a teeth portion are stacked.
- a stator core in which a plurality of annular core plates each having an annular core back portion and a teeth portion are stacked.
- Patent Document 1 manufactures a core plate by punching a strip-shaped sheet piece having a core back and a tooth portion from a grain-oriented electrical steel sheet having a direction of easy magnetization in one direction and winding the sheet piece in an annular shape.
- a technique is disclosed (Patent Document 1). This makes it possible to manufacture a core plate in which the easy magnetization direction in the tooth portion is aligned with the extending direction of the tooth portion.
- the direction-oriented electrical steel sheet has the easy magnetization direction aligned in one direction, so that the easy-magnetization direction of the direction-oriented electrical steel sheet is punched so as to be the extension direction of the teeth, and then wound.
- the core plate is manufactured by turning, the easy magnetization direction in the core back portion also becomes the extension direction of the teeth portion.
- magnetization becomes difficult by the magnetic circuit of the stator core. That is, the magnetic characteristics in the teeth portion are good, but the magnetic characteristics in the core back portion are deteriorated.
- the present disclosure has been made in view of such a problem, and an object of the present disclosure is to provide a method of manufacturing a core plate that can improve magnetic characteristics in a tooth portion and prevent deterioration of magnetic characteristics in a core back portion.
- One aspect of the present disclosure is a method for manufacturing a core plate having an annular core back portion and a plurality of teeth portions extending from the core back portion toward the center.
- the manufacturing method includes a punching process, a winding process, a distortion process, and an annealing process.
- a punching process from a grain-oriented electrical steel sheet having an easy magnetization direction in one direction in the plane, a strip-shaped core back portion extending in a direction perpendicular to the easy magnetization direction, and parallel to the easy magnetization direction from the strip core back portion.
- a core sheet piece having a plurality of extending parallel teeth portions is punched out.
- the core sheet having the core back portion and the teeth portion is obtained by winding the core sheet piece in an annular shape with the parallel teeth portion being inward.
- the strain processing step compressive strain is applied in the plate thickness direction to the band-shaped core back portion of the core sheet piece or the core back portion of the core plate.
- the annealing step after the strain processing step, the band-shaped core back portion or the core back portion is recrystallized by annealing.
- Another aspect of the present disclosure is a method for manufacturing a core plate having an annular core back portion and a plurality of teeth portions extending from the core back portion toward the center.
- the manufacturing method includes a strain processing step, a punching step, a winding step, and an annealing step.
- the strain processing step in the grain-oriented electrical steel sheet having the easy magnetization direction in one direction in the plane, compressive strain is applied in the plate thickness direction to the band-shaped core back portion formation scheduled area extending in the direction perpendicular to the easy magnetization direction.
- a core sheet piece having a strip-shaped core back portion existing in the band-shaped core back portion formation scheduled region and a plurality of parallel teeth portions extending in parallel to the easy magnetization direction from the strip-shaped core back portion is formed in the above direction. Punched from heat-resistant electrical steel sheet.
- a core plate having the core back portion and the teeth portion is obtained by winding the core sheet piece in an annular shape with the parallel teeth portion inside.
- the band-shaped core back portion formation planned region, the band-shaped core back portion, or the core back portion is recrystallized by annealing after the strain processing step.
- a parallel tooth portion extending in parallel with the direction of easy magnetization of the grain-oriented electrical steel sheet is formed, and the core sheet piece is wound in an annular shape with the parallel tooth portion inside. Therefore, in the teeth portion, the easy magnetization direction can be aligned with the direction toward the center of the annular core plate.
- the core back portion is recrystallized. Therefore, the easy magnetization direction of the grain-oriented electrical steel sheet can be set to a random direction. Therefore, it is possible to prevent the easy magnetization direction from being the extension direction of the tooth portion, that is, the center direction of the core plate.
- the desired direction of the easy magnetization direction in the core back portion is the circumferential direction in the annular core back portion. Therefore, when the direction orthogonal to the circumferential direction, that is, the extending direction of the teeth portion is the easy magnetization direction in the core back portion, the core back becomes difficult to be magnetized.
- the easy magnetization direction in the core back portion can be made random. Therefore, in the core back portion, the easy magnetization direction parallel to the extending direction of the tooth portion can be reduced. As a result, it is possible to prevent a decrease in magnetic characteristics of the core back portion.
- the core back portion is subjected to recrystallization by annealing after being given compressive strain. Therefore, it is easy to recrystallize at the time of annealing, and it becomes possible to recrystallize at low temperature in a short time. Therefore, in the annealing step, not only the core back portion, the strip-shaped core back portion, or the core back portion formation scheduled region, but also the core plate including the core back portion, the core sheet piece including the strip-shaped core back portion, or the core back portion. It becomes possible to heat the grain-oriented electrical steel sheet including the region to be formed.
- the core back portion, the band-shaped core back portion, or the core back portion formation scheduled region can be selectively recrystallized.
- the above manufacturing method it is possible to obtain a core plate having a tooth portion in which the easy magnetization direction is the extension direction of the tooth portion and a core back portion in which the easy magnetization direction is the random direction. Therefore, according to the said aspect, while providing the magnetic characteristic in a teeth part, the provision of the manufacturing method of the core board which can prevent the fall of the magnetic characteristic in a core back part is attained.
- Embodiment 1 (a) a plan view of a grain-oriented electrical steel sheet, (b) a plan view of a core sheet piece, (c) a plan view of a core sheet piece having compressive strain in a belt-like core back portion, (d) a core back The top view of the core board which has a compressive strain in a part, (e) The top view of the core board which has a recrystallization area
- FIG. The enlarged view of the core board which shows the easy magnetization direction in Embodiment 1.
- FIG. 4E is a plan view of a core plate having a recrystallization region in the core back portion.
- Embodiment 3 (a) a plan view of the grain-oriented electrical steel sheet, (b) a plan view of the core sheet piece (b), (c) a plan view of the core sheet piece having compressive strain in the belt-like core back portion, (d) 1) A plan view of a core sheet piece having a recrystallized region in the core back part, and (e) a plan view of a core plate having a recrystallized region.
- Embodiment 4 (a) a plan view of a grain-oriented electrical steel sheet having a compressive strain in a core back portion formation scheduled region, (b) a plan view of a core sheet piece having a compressive strain in a belt-like core back portion, (c) a core The top view of the core board which has a compressive strain in a back part, (d) The top view of the core board which has a recrystallization area
- Embodiment 6 (a) The top view of a core sheet piece, (b) Explanatory drawing which shows a mode that a core sheet piece is wound, giving a compressive strain to a strip
- FIG. 15 is a cross-sectional view taken along line XV-XV in FIG.
- FIG. 7 is a partially enlarged cross-sectional view of a core plate in a sixth embodiment.
- FIGS. 1A and 1E An embodiment according to a manufacturing method of a core plate will be described with reference to FIGS.
- a straining process, a winding process, and an annealing process are performed, and as illustrated in FIG. 1E, an annular core back part 11 and a core back part A core plate 1 having a plurality of teeth portions 12 extending from 11 toward the center O is manufactured.
- a mode in which a core plate is manufactured by sequentially performing a punching process, a straining process, a winding process, and an annealing process will be described.
- the outline of each process is shown below.
- the strip-shaped core back portion 21 extending from the directional electromagnetic steel sheet 3 in the direction X easy to the magnetization direction Y and the magnetization
- the core sheet piece 2 having a plurality of parallel teeth portions 22 extending in parallel with the easy direction Y is punched out.
- compressive strain is applied in the plate thickness direction Z to the strip-shaped core back portion 21 of the core sheet piece 2 as illustrated in FIG.
- the direction perpendicular to the paper surface is the plate thickness direction.
- the core back portion 11 is formed by winding the core sheet piece 2 in an annular shape with the parallel teeth portion 22 inside. And the core plate 1 having the teeth portion 12 is obtained.
- the core back portion 11 is recrystallized by annealing.
- the core sheet piece 2 having a strip-shaped core back portion 21 and a plurality of parallel teeth portions 22 from the grain-oriented electrical steel sheet 3.
- the grain-oriented electrical steel sheet 3 has an easy magnetization direction Y in one direction in the plane. That is, the directional electrical steel sheet 3 is an electrical steel sheet in which the easy magnetization direction Y is aligned in one direction in the in-plane direction of the plate-shaped electrical steel sheet.
- the in-plane direction is a direction perpendicular to the thickness direction of the electrical steel sheet.
- the grain-oriented electrical steel sheet 3 for example, a commercially available product can be used, for example, 23ZH85 manufactured by Nippon Steel & Sumitomo Metal Corporation can be used.
- the easy magnetization direction Y of the grain-oriented electrical steel sheet 3 is a direction parallel to the rolling direction.
- the strip-shaped core back portion 21 is punched so as to extend in the direction X easy to the magnetization direction Y of the grain-oriented electrical steel sheet 3. That is, the longitudinal direction of the strip-shaped core back portion 21 is parallel to the direction X perpendicular to the easy magnetization direction Y.
- the parallel teeth portion 22 is punched out so as to extend parallel to the easy magnetization direction Y of the directional electromagnetic steel sheet 3.
- the core sheet piece 2 has a comb shape as illustrated in FIG. 1B, and the parallel teeth portion 22 is formed in a comb tooth shape.
- the vertical direction includes not only the direction of 90 ° but also the direction close to 90 ° in appearance.
- the method for imparting compressive strain in the strain processing step is not particularly limited, and various compression processing methods that can apply compressive strain to the band-shaped core back portion 21 can be used.
- the compressive strain may be either a compressive plastic strain or a compressive elastic strain, but a compressive plastic strain is preferable from the viewpoint of easier recrystallization in the annealing process.
- shot peening, water jet peening, laser peening, ultrasonic peening, forging, or roller rolling is preferable. become. Further, from the viewpoint that the processing region can be controlled relatively easily and compression plastic strain can be prevented from being applied to portions other than the belt-like core back portion 21 such as the parallel teeth portion 22, shot peening, water jet peening, laser peening. Ultrasonic peening is more preferable. On the other hand, forging and roller rolling are more preferable from the viewpoints that sufficient compressive plastic strain can be imparted, the easy magnetization direction in the core back portion tends to be more random, and the magnetic properties can be further improved.
- an injection material 40 called a shot is injected from the injection nozzle 41 of the shot peening apparatus onto the belt-like core back portion 21 in the core sheet piece 2.
- the injection direction is parallel to the plate thickness direction Z of the core sheet piece 2.
- a winding process can be performed.
- Two arrows extending downward from both ends in FIG. 1C indicate the direction of winding in the winding process.
- the core sheet piece 2 is wound in an annular shape with the parallel teeth portion 22 inside. Since the core sheet piece 2 is curled in the direction of the arrow shown in FIG. 1 (c), the winding process can also be called a curling process.
- the strip-shaped core back portion 21 forms the annular core back portion 11
- the parallel teeth portion 22 forms the teeth portion 12. And it processes so that the extension direction of each teeth part 12 may face the center O of the annular
- the core plate 1 obtained after the winding processing step has a compressive strain in the core back portion 11.
- FIG. 1 (e) the recrystallized region is indicated by hatching.
- hatched hatching indicates a recrystallization region.
- the core plate 1 is heated. Thereby, as illustrated in FIG. 1E, recrystallization occurs in the core back portion 11 to which the compressive strain is applied. Then, by recrystallization, the easy magnetization direction is dispersed, and the easy magnetization direction in the core back portion 1 can be changed to a random direction (see FIG. 3).
- the broken line arrow in FIG. 3 shows the easy magnetization direction in each part of the core plate. The same applies to FIGS. 8 and 10 described later.
- recrystallization In the core back part 11 to which compressive strain is applied, recrystallization easily occurs in the annealing process. Therefore, recrystallization is possible by annealing at a low temperature for a short time. In the annealing step, recrystallization does not occur in a region other than the core back portion 11 such as the tooth portion 12 where the compressive strain is not applied, and the recrystallization occurs in the core back 11 provided with the compressive strain. Can be annealed.
- the heating temperature in the annealing step can be appropriately adjusted depending on the composition of the material, the degree of strain, and the like, but is 700 to 1100 ° C., for example.
- the heating temperature in the annealing step is preferably 700 to 850 ° C., and is preferably 700 to 800. More preferably, it is ° C.
- the holding time at the above-described heating temperature in the annealing step can be appropriately adjusted depending on the plasticity of the material, the degree of strain, productivity, etc., and is, for example, 1 second to 2 hours.
- annealing can be performed with a short heating and holding time of, for example, 10 seconds or less.
- the heating and holding time in the annealing step is preferably short, and preferably 600 seconds or less.
- the heating and holding time is preferably 5 seconds or more, and more preferably 10 seconds or more.
- a parallel tooth portion 22 extending in parallel with the easy magnetization direction Y of the grain-oriented electrical steel sheet 3 is formed, and the core sheet is formed with the parallel tooth portion 22 as an inner side.
- the piece 2 is wound in an annular shape. Therefore, in the teeth portion 12 of the core plate 1 obtained by the above manufacturing method, as illustrated in FIG. 3, in the extending direction L of the teeth portion 12, that is, in the direction toward the center O of the annular core plate 1.
- the easy magnetization direction can be aligned. As a result, the magnetic characteristics of the tooth part 12 can be improved.
- the core back part 11 is recrystallized in the annealing process. Therefore, as illustrated in FIG. 3, in the core back portion 11, the easy magnetization direction Y can be set to a random direction. Therefore, in spite of being manufactured using the grain-oriented electrical steel sheet, the direction of easy magnetization in the core back portion 81 is the teeth portion as in the core plate 8 illustrated in Comparative Example 1 described later illustrated in FIG. It is possible to prevent the extension direction L of 82, that is, the center O direction from the core back portion 81.
- the desired direction of the easy magnetization direction in the core back portion is the circumferential direction in the annular core back portion
- the easy magnetization direction in the direction orthogonal to the circumferential direction C in the core back portion 81 that is, parallel to the extension direction L of the teeth portion 12.
- the easy magnetization direction is a magnetization difficult direction in the circumferential direction C of the core back portion 81, which is an undesirable direction in terms of magnetic characteristics.
- the easy magnetization direction in the core back portion 11 can be made random as illustrated in FIG. Therefore, the easy magnetization direction in a direction parallel to the extending direction L of the tooth portion in the core back portion 11 can be reduced. As a result, it is possible to prevent the magnetic properties of the core back portion 11 from being lowered while enhancing the magnetic properties of the tooth portion 12 described above.
- the core back portion 11 is subjected to recrystallization by annealing after being subjected to compressive strain. Therefore, it is easy to recrystallize at the time of annealing, and it becomes possible to recrystallize at low temperature in a short time. Therefore, in the annealing process, it is not necessary to partially heat the core back portion 11 of the core plate 1, and the entire core plate 1 including the core back portion can be heated. That is, in the annealing process, even if the core plate 1 is heated, the core back portion 11 can be selectively recrystallized while preventing recrystallization of the teeth portion 12.
- the steps after the punching step are out of order as long as the annealing step is performed after the straining step, and the order can be changed.
- it can carry out in order of a punching process, a distortion process, a winding process, and an annealing process.
- it can also carry out in order of a punching process, a winding process, a distortion process, and an annealing process.
- it can also carry out in order of a punching process, a distortion process, an annealing process, and a winding process.
- An embodiment in which the order of each process after the punching process is changed will be described in the second and third embodiments described later.
- the strain processing step and the winding processing step may be performed simultaneously.
- the annealing process is preferably performed at the end of each process.
- not only the compressive strain in the thickness direction applied in the strain processing step, but also the in-plane strain that can occur in the winding processing step can be eliminated by annealing. Therefore, deterioration of iron loss can be prevented.
- the core sheet piece 2 made of a homogeneous material without the inhomogeneous processing strain that can be applied in the winding processing is compressed. Strain can be applied. Therefore, in the strain processing step, the compressive strain in the plate thickness direction Z can be uniformly applied to the entire material of the strip-shaped core back portion 21 in the core sheet piece 2. Further, in this case, since the compressive strain can be applied by compressing the strip-shaped core back portion 21 extending in one direction, the compressive processing is facilitated and the selection range of the compression processing method is widened.
- the core plate 1 having the teeth portion 12 in which the easy magnetization direction is the extension direction L of the tooth portion 12 and the core back portion 11 in which the easy magnetization direction is the random direction Obtainable. Therefore, according to the manufacturing method of the said core board 1, while the magnetic characteristic in the teeth part 12 can be improved, the fall of the magnetic characteristic in the core back part 11 can be prevented. That is, the core plate 1 can exhibit a high magnetic flux density in both the core back portion 11 and the teeth portion 12. Therefore, the core plate 1 is suitable for a stator core of a rotating electrical machine, for example.
- the core plate is manufactured by sequentially performing a winding process, a distortion process, and an annealing process after the punching process.
- the same reference numerals as those used in the above-described embodiments represent the same components as those in the above-described embodiments unless otherwise indicated.
- the belt-shaped core back portion 21 and the parallel teeth portion 22 are formed.
- a core sheet piece 2 having the following is obtained.
- a winding process is performed, and the core sheet piece 2 is wound in an annular shape with the parallel teeth portion 22 inside as illustrated in FIGS. 4B and 4C.
- the core board 1 which has the core back part 11 and the teeth part 12 is obtained.
- a strain processing step is performed, and compressive strain is applied to the core back portion 11 of the core plate 1 in the plate thickness direction as illustrated in FIG.
- an annealing step is performed, and the core back portion 11 is recrystallized by annealing as illustrated in FIG. In this way, a core plate 1 similar to that of Embodiment 1 can be obtained.
- each step can be performed in the same manner as in the first embodiment.
- a compressive strain in the thickness direction is applied to the core back portion 11 that has been stretched in the circumferential direction by the winding process. Therefore, the winding process can be performed in a state where there is no distortion applied in the distortion processing step. Therefore, winding processing with low processing stress is possible. Furthermore, the dimensional accuracy of the winding process can be improved. In addition, the same effects as those of the first embodiment can be obtained.
- the core plate is manufactured by sequentially performing a straining process, an annealing process, and a winding process after the punching process.
- the core sheet piece 2 is produced from the grain-oriented electrical steel sheet 3 by performing a punching process in the same manner as in the first embodiment.
- the strain processing step in the same manner as 1, compressive strain is applied to the band-shaped core back portion 21 of the core sheet piece 2 as illustrated in FIG.
- the band-shaped core back portion 21 of the core sheet piece 2 is recrystallized as illustrated in FIG.
- the core sheet piece 2 is wound in an annular shape with the parallel teeth portion 22 inside.
- the core board 1 which has the core back part 11 and the teeth part 12 is obtained.
- a core plate 1 similar to that of Embodiment 1 can be obtained.
- each step can be performed in the same manner as in the first embodiment.
- the recrystallized grains obtained in the annealing process can be controlled to fine grains having a grain size of 500 ⁇ m or less, for example.
- elongation deformation in the band-shaped core back portion 21 easily occurs during the winding process, and the workability is improved. Therefore, it becomes easy to process into a desired shape such as an annular shape.
- shrinkage deformation that may occur in the annealing process is corrected by the winding process, the dimensional accuracy of the core plate 1 can be improved.
- the same effects as those of the first embodiment can be obtained.
- a core plate 1 similar to that of the first embodiment is manufactured by performing a punching process, a winding process, and an annealing process after the distortion process.
- the steps after the strain processing step are out of order as long as the winding step is performed after the punching step, and the order can be changed.
- the form performed in order of a distortion processing process, a punching process, a winding process, and an annealing process is demonstrated.
- a band-shaped core back portion formation scheduled region 31 is determined.
- the band-shaped core back portion formation scheduled region 31 has the same shape as the band-shaped core back portion 21 in the core sheet piece 2 obtained after the punching process, but on the grain-oriented electrical steel sheet 3 before the punching process is actually performed. It is a virtual area. In other words, it can be said that the band-shaped core back portion formation scheduled region 31 is like a design drawing on the grain-oriented electrical steel sheet 3.
- the band-shaped core back portion formation scheduled region 31 it is also possible to determine the parallel teeth portion formation scheduled region 32 that becomes the parallel teeth portion 22 after the punching process, and after the punching process, the core sheet piece 2 and The core sheet piece formation scheduled area 30 to be formed can be determined. What is necessary is just to determine at least the band-shaped core back portion formation scheduled region 31 extending in the perpendicular direction X and the easy magnetization direction Y in the grain-oriented electrical steel sheet 3.
- the strain processing step as illustrated in FIG. 6A, compressive strain is applied to the band-shaped core back portion formation scheduled region 31 of the grain-oriented electrical steel sheet 3 in the thickness direction.
- the core sheet piece 2 having the band-shaped core back portion 21 and the parallel teeth portion 22 is obtained.
- the punching is performed so that the band-shaped core back portion 21 is formed from the predetermined band-shaped core back portion formation scheduled region 31. That is, the strip-shaped core back portion 21 is formed by punching from the strip-shaped core back portion formation scheduled region 31 existing in the grain-oriented electrical steel sheet 3.
- the core sheet piece 2 obtained in this way has a strip-shaped core back portion 21 to which a compressive strain has already been applied.
- each step can be performed in the same manner as in the first embodiment.
- the straining process is performed before the punching process as in this embodiment, for example, by using a press machine called a transfer press die
- the straining process and the punching process are continuously performed by the same press machine. It becomes possible to do. That is, as illustrated in FIG. 6A and FIG. 6B, automatic application of compressive strain in the thickness direction to the band-shaped core back portion formation scheduled region 31 and punching of the core sheet piece 2 are performed automatically. It can be performed continuously by processing. Therefore, it is possible to speed up the distortion processing process and the punching process.
- the same effects as those of the first embodiment can be obtained.
- the steps after the strain processing step are in no particular order, and the order can be changed. Although illustration and detailed description are omitted, for example, a straining process, a punching process, an annealing process, and a winding process may be performed in this order. Moreover, it can also carry out in order of a distortion process, an annealing process, a punching process, and a winding process.
- a core sheet having the same shape as that of the first embodiment is manufactured by punching a core sheet piece from the grain-oriented electrical steel sheet and winding the core sheet piece. Specifically, as illustrated in FIGS. 7A and 7B, first, by performing a punching process in the same manner as in the first embodiment, the band-shaped core back portion is formed from the grain-oriented electrical steel sheet 3. The core sheet piece 2 which has 21 and the parallel teeth part 22 is produced. The core sheet piece 2 is the same as that of the first embodiment.
- FIG. 7B a winding process is performed, and as illustrated in FIG. 7B, the core sheet piece 2 is wound in an annular shape with the parallel teeth portion 22 inside.
- the core board 8 which has the core back part 81 and the teeth part 82 is obtained so that it may be illustrated by FIG.7 (c).
- the core back portion 81 has not undergone the strain processing step and the annealing step as in the first to fourth embodiments. Therefore, as illustrated in FIG. 8, the easy magnetization direction of the core back portion 81 and the easy magnetization direction of the tooth portion 82 are parallel to each other, and both are in the extending direction L of the tooth portion 82.
- the easy magnetization direction is parallel to the desired extension direction L in the tooth portion 82, the magnetic characteristics are excellent.
- the easy magnetization direction is the desired circumferential direction. The direction is orthogonal to the direction C. That is, the core back portion 81 is difficult to be magnetized in the magnetic circuit, which is not preferable in terms of magnetic characteristics.
- a core plate having the same shape as that of Embodiment 1 is manufactured by punching from a non-oriented electrical steel sheet.
- a non-oriented electrical steel sheet 300 with an in-plane easy magnetization direction random was prepared.
- a commercially available product can be used as the non-oriented electrical steel sheet 300.
- the core plate 9 having the same shape as that of the first embodiment having the core back portion 91 and the teeth portion 92 was produced by punching from the non-oriented electrical steel sheet 300.
- the easy magnetization direction is a random direction in both the core back portion 91 and the teeth portion 92 as illustrated in FIG. Therefore, compared with the core plate 1 of the first to fourth embodiments having the easy magnetization direction parallel to the extending direction L of the tooth portion 92, the magnetic characteristics in the tooth portion 92 are deteriorated.
- a core plate is manufactured by sequentially performing a punching process, a distortion process, a winding process, and an annealing process in the same manner as in the first embodiment.
- the core sheet piece 2 having the belt-like core back portion 21 and the parallel teeth portion 22 is punched (see FIGS. 1A and 1B).
- compressive strain is applied in the plate thickness direction Z to the band-shaped core back portion 21 of the core sheet piece 2 by roller rolling. That is, the band-shaped core back portion 21 of the core sheet piece 2 is sandwiched between the pair of rollers 51 and 52 of the rolling mill 5 and subjected to rolling to apply compressive strain.
- the thickness of the band-shaped core back portion 21 is reduced, and for example, is processed into a uniform thickness. As illustrated in the sixth embodiment described later, the thickness of the band-shaped core back portion 21 can be inclined.
- the core plate 1 can be manufactured by performing a winding process and an annealing process.
- FIG. 12 shows an example of an enlarged cross-sectional view of the boundary portion between the core back portion 11 and the teeth portion 12 in the core plate 1 obtained according to this embodiment. Since compressive strain is applied to the belt-shaped core back portion 21 in the strain processing step, the thickness T1 of the core back portion 11 is smaller than the thickness T2 of the teeth portion 12 as illustrated in FIG. That is, T1 ⁇ T2.
- the thickness difference ⁇ T (unit:%) between the core back portion 11 and the teeth portion 12 is calculated from the following formula (I) from the thickness T1 of the core back portion 11 and the thickness T2 of the teeth portion 12.
- the thickness difference ⁇ T between the core back portion 11 and the tooth portion 12 is preferably 5 to 20%. That is, it is preferable to apply compressive strain in the strain processing step so that the thickness difference ⁇ T between the core back portion 11 and the tooth portion 12 is 5 to 20%.
- the magnetic flux density in the core back portion 11 of the core plate 1 can be further improved and the hysteresis loss can be further reduced. As a result, the magnetic characteristics in the core back portion can be further improved. From the viewpoint of further improving the magnetic flux density in the core back portion, ⁇ T is more preferably 10 to 20%.
- test piece having a length of 55 mm and a width of 55 mm was cut out from the grain-oriented electrical steel sheet similar to that of the first embodiment.
- the thickness of the test piece is 0.27 mm.
- the thickness change rate ⁇ Tp (unit:%) was calculated by the following formula (II).
- ⁇ Tp (Tp2 ⁇ Tp1) ⁇ 100 / Tp2 (II)
- test pieces having ⁇ Tp of 0, 5%, 10%, 20%, and 30% were prepared.
- the thickness of the test piece is the minimum thickness when there is an inclination or variation in the thickness. However, if there is a part whose thickness is extremely smaller than the surrounding area, that part is excluded. The thickness was measured using a micrometer M110-OM manufactured by Mitutoyo Corporation.
- each test piece was heated in the same manner as in Embodiment 1 and recrystallized by annealing. Thus, the test piece used as a model of a core back part was obtained.
- the magnetic properties of the test piece were evaluated.
- the magnetic properties are evaluated in accordance with “Magnetic Steel Sheet Single Sheet Magnetic Properties Test Method” defined in JIS C 2556, except that the shape of the test piece is a square of 50 mm ⁇ 50 mm as described above. This was done by measuring the hysteresis loss. For the measurement, a magnetic property inspection apparatus SK300 manufactured by Metron Engineering Co., Ltd. was used.
- FIG. 13 shows the relationship between the rate of change ⁇ Tp in thickness and the magnetic flux density when the magnetic field H is 5000 A / m, and the relationship between the rate of change ⁇ Tp in thickness and the hysteresis loss when the frequency is 400 Hz and the magnetic flux density is 1.0 T. Since the thickness change rate ⁇ Tp is synonymous with the thickness difference ⁇ T between the core back portion and the tooth portion in the fifth embodiment, FIG. 13 shows the thickness change rate between the core back portion and the tooth portion. As shown. In the graph of FIG. 13, the horizontal axis indicates the thickness difference between the core back portion and the tooth portion. The vertical axis on the left shows the magnetic flux density when the magnetic field H is 5000 A / m. The vertical axis on the right side shows the hysteresis loss at a frequency of 400 Hz and a magnetic flux density of 1.0 T.
- the thickness difference between the core back portion and the teeth portion is 5 to 20%, the magnetic flux density can be further improved and the hysteresis loss can be further reduced. That is, in order to further improve the magnetic characteristics, the thickness difference between the core back portion and the tooth portion is preferably 5 to 20%. More preferably, the thickness difference is 10 to 20%.
- the magnetic flux density of the core back portion is preferably 1.65 T or more, and more preferably 1.7 T or more.
- the hysteresis loss of the core back portion is preferably 7 W / kg or less.
- a taper region is formed in the core back portion while simultaneously performing the strain processing step and the winding step.
- a core plate is manufactured by performing a punching process, a distortion process, a winding process, and an annealing process.
- the grain-oriented electrical steel sheet is punched in the same manner as in the first embodiment, and the core sheet piece 2 having the strip-shaped core back portion 21 and the parallel teeth portion 22 is punched as illustrated in FIG. .
- the straining process and the winding process are performed in the same process.
- the sheet pieces 2 are sequentially wound in an annular shape.
- the application of the compressive strain can be performed by, for example, roller rolling, as in the fifth embodiment.
- the strain processing step by roller rolling it is possible to form a tapered region 115 in which the plate thickness is inclined in the belt-like core back portion 21.
- the taper region 115 is formed so that the plate thickness in the belt-like core back portion 21 decreases toward the outer edge 100 side opposite to the teeth portion side.
- the core plate 1 can be obtained by performing an annealing process.
- FIG. 16 the expanded sectional view of the boundary part of the core back part 11 and the teeth part 12 in the core board 1 of this form is shown.
- the core back portion 11 has a tapered region 115 whose thickness decreases from the center of the core plate 1 toward the outside. That is, in the taper region 115, the thickness of the core back portion 11 decreases toward the outer edge 100, and the thickness of the core back portion 11 is inclined.
- the straining process and the winding process can be performed simultaneously. Therefore, the manufacturing process can be shortened and the productivity can be improved. In this case, the outer edge 100 side of the strip-shaped core back portion 21 is easily extended. Therefore, winding can be performed more easily. From this point of view, productivity is improved.
- the tapered region 115 is not necessarily formed over the entire core back portion 11, but is formed over the entire core back portion 11 from the viewpoint of imparting compressive strain and improving the magnetic characteristics of the core back portion 11. It is preferable.
- the difference in thickness of the core back portion 11 with respect to the teeth portion 12 is set to 5 to 20% as in the fifth embodiment and the experimental example. It is preferable. Even when the core back part 11 has the taper area
- the present disclosure is not limited to the above embodiments, and can be applied to various embodiments without departing from the scope of the disclosure.
- the shot peening method is illustrated and described as the compression processing method.
- other peening methods, forging, and the like can be performed, as in the fifth and sixth embodiments.
- roller rolling it is also possible to perform roller rolling.
- an annular core plate has been described, it is also possible to produce an elliptical, polygonal or other annular core plate such as a quadrangular ring or a hexagonal ring.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Thermal Sciences (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
Description
コア板の製造方法にかかる実施形態について、図1~図3を参照して説明する。本形態においては、打抜き加工工程後に、歪加工工程、巻回加工工程、及び焼鈍工程を行って、図1(e)に例示されるように、円環状のコアバック部11と、コアバック部11からその中心Oに向かって延びる複数のティース部12とを有するコア板1を製造する。
本形態においては、打抜き加工工程後に、巻回加工工程、歪加工工程、及び焼鈍工程を順次行ってコア板を製造する。なお、実施形態2以降において用いた符号のうち、既出の実施形態において用いた符号と同一のものは、特に示さない限り、既出の実施形態におけるものと同様の構成要素等を表す。
本形態においては、打抜き加工工程後に、歪加工工程、焼鈍工程、及び巻回加工工程を順次行ってコア板を製造する。図5(a)及び図5(b)に例示されるように、まず、実施形態1と同様に打抜き加工工程を行うことにより方向性電磁鋼板3からコアシート片2を作製し、さらに実施形態1と同様に歪加工工程を行うことにより、図5(c)に例示されるように、コアシート片2の帯状コアバック部21に圧縮ひずみを付与する。
本実施形態においては、歪加工工程後に、打抜き加工工程、巻回加工工程、及び焼鈍工程を行って実施形態1と同様のコア板1を製造する。歪加工工程後の各工程は、打抜き加工工程を経た後に巻回加工工程が行われていれば順不同であり、順序を入れ替えることができる。以下に、歪加工工程、打抜き加工工程、巻回加工工程、焼鈍工程の順で行う形態について説明する。
本形態においては、方向性電磁鋼板からコアシート片を打ち抜き、このコアシート片を巻回させることにより、実施形態1と同形状のコア板を製造する。具体的には、図7(a)及び(b)に例示されるように、まず、実施形態1と同様にして、打抜き加工工程を行うことにより、方向性電磁鋼板3から、帯状コアバック部21と平行ティース部22とを有するコアシート片2を作製する。コアシート片2は実施形態1と同様のものである。
本形態においては、無方向性電磁鋼板から打ち抜きにより、実施形態1と同形状のコア板を製造する。まず、図9(a)に例示されるように、面内の磁化容易方向がランダムな無方向性電磁鋼板300を準備した。無方向性電磁鋼板300としては、市販品を使用することができる。次いで、無方向性電磁鋼板300からコアバック部91とティース部92とを有する実施形態1と同形状のコア板9を打ち抜きにより作製した。
本形態においては、歪加工工程をローラ圧延により行う形態について説明する。本形態においては、実施形態1と同様にして打抜き加工工程、歪加工工程、巻回加工工程、焼鈍工程を順次行ってコア板を製造する。
コアバック部11とティース部12との厚み差ΔTは、5~20%であることが好ましい。つまり、コアバック部11とティース部12との厚み差ΔTが5~20%になるように歪加工工程において圧縮ひずみを付与することが好ましい。この場合には、後述の実験例において示すように、コア板1のコアバック部11における磁束密度をより向上できると共に、ヒステリシス損をより低減できる。その結果、コアバック部における磁気特性をより向上させることができる。コアバック部における磁束密度がさらに向上するという観点から、ΔTは10~20%であることがより好ましい。
本例においては、方向性電磁鋼板の試験片に圧縮ひずみを付与して、厚みの異なる複数の試験片を作製し、各試験片の磁気特性の評価を行う。これにより、コアバック部とティース部との厚み差の好ましい範囲を調べる例である。
本例においては、ΔTpが0、5%、10%、20%、30%の試験片を作製した。試験片の厚みは、厚みに傾斜やばらつきがある場合には最小厚のことである。ただし、周囲に比べて極端に厚みが小さくなっている部分がある場合にはその部分を除外する。厚みの測定は(株)ミツトヨ製のマイクロメータM110-OMを用いて測定した。
本形態においては、歪加工工程と巻回工程とを同時進行させながら、コアバック部にテーパ領域を形成する例について説明する。本形態においても、打抜き加工工程、歪加工工程、巻回加工工程、焼鈍工程を行ってコア板を製造する。
Claims (5)
- 環状のコアバック部(11)と、上記コアバック部から中心(O)に向かって延びる複数のティース部(12)とを有するコア板(1)の製造方法において、
面内の一方向に磁化容易方向(Y)を有する方向性電磁鋼板(3)から、上記磁化容易方向と垂直方向(X)に延びる帯状コアバック部(21)と、上記帯状コアバック部から上記磁化容易方向に平行に延びる複数の平行ティース部(22)とを有するコアシート片(2)を打ち抜く打抜き加工工程と、
上記平行ティース部を内側にして上記コアシート片を環状に巻回させることにより、上記コアバック部と上記ティース部とを有する上記コア板を得る巻回加工工程と、
上記コアシート片の上記帯状コアバック部又は上記コア板の上記コアバック部に、板厚方向(Z)に圧縮ひずみを付与する歪加工工程と、
上記歪加工工程後に、上記帯状コアバック部又は上記コアバック部を焼鈍により再結晶化させる焼鈍工程と、を有するコア板の製造方法。 - 環状のコアバック部(11)と、上記コアバック部から中心(O)に向かって延びる複数のティース部(12)とを有するコア板(1)の製造方法において、
面内の一方向に磁化容易方向(Y)を有する方向性電磁鋼板(3)において、上記磁化容易方向と垂直方向(X)に延びる帯状コアバック部形成予定領域(31)に、板厚方向に圧縮ひずみを付与する歪加工工程と、
上記帯状コアバック部形成予定領域に存在する帯状コアバック部(21)と、上記帯状コアバック部から上記磁化容易方向に平行に延びる複数の平行ティース部(22)とを有するコアシート片(2)を上記方向性電磁鋼板から打ち抜く打抜き加工工程と、
上記平行ティース部を内側にして上記コアシート片を環状に巻回させることにより、上記コアバック部と上記ティース部とを有する上記コア板を得る巻回加工工程と、
上記歪加工工程後に、上記帯状コアバック部形成予定領域、上記帯状コアバック部、又は上記コアバック部を焼鈍により再結晶化させる焼鈍工程と、を有するコア板の製造方法。 - 上記歪加工工程においては、ショットピーニング、ウォータジェットピーニング、レーザピーニング、超音波ピーニング、鍛造、又はローラ圧延加工により、上記圧縮ひずみを付与する、請求項1又は2に記載のコア板の製造方法。
- 上記コアバック部と上記ティース部との厚み差が5~20%となるように上記歪加工工程を行う、請求項1~3のいずれか1項に記載のコア板の製造方法。
- 上記コアバック部は上記中心から外方に向けて厚みが小さくなるテーパ領域(115)を有する、請求項1~4のいずれか1項に記載のコア板の製造方法。
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA3031179A CA3031179C (en) | 2016-07-21 | 2017-07-18 | Method for manufacturing core plate |
CN201780044185.8A CN109478834B (zh) | 2016-07-21 | 2017-07-18 | 芯板的制造方法 |
MX2019000810A MX2019000810A (es) | 2016-07-21 | 2017-07-18 | Metodo de fabricacion de placa de nucleo. |
PL17830991T PL3490119T3 (pl) | 2016-07-21 | 2017-07-18 | Sposób wytwarzania płyty rdzeniowej |
BR112019000962-0A BR112019000962B1 (pt) | 2016-07-21 | 2017-07-18 | Método para fabricação de uma placa de núcleo |
KR1020197001927A KR102243007B1 (ko) | 2016-07-21 | 2017-07-18 | 코어판의 제조 방법 |
EP17830991.0A EP3490119B1 (en) | 2016-07-21 | 2017-07-18 | Method for manufacturing core plate |
US16/250,025 US10749416B2 (en) | 2016-07-21 | 2019-01-17 | Method for manufacturing core plate |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016143361 | 2016-07-21 | ||
JP2016-143361 | 2016-07-21 | ||
JP2017107106A JP6633025B2 (ja) | 2016-07-21 | 2017-05-30 | コア板の製造方法 |
JP2017-107106 | 2017-05-30 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/250,025 Continuation US10749416B2 (en) | 2016-07-21 | 2019-01-17 | Method for manufacturing core plate |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2018016475A1 true WO2018016475A1 (ja) | 2018-01-25 |
Family
ID=60992462
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2017/025915 WO2018016475A1 (ja) | 2016-07-21 | 2017-07-18 | コア板の製造方法 |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO2018016475A1 (ja) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01159323A (ja) * | 1987-12-17 | 1989-06-22 | Nippon Steel Corp | 方向性電磁鋼板の鉄損低減装置 |
JPH01159324A (ja) * | 1987-12-17 | 1989-06-22 | Nippon Steel Corp | 方向性電磁鋼板の鉄損値低減装置 |
JPH0992561A (ja) * | 1995-09-22 | 1997-04-04 | Nippon Steel Corp | 回転機器用螺旋コア、およびその製造法 |
JP2014193000A (ja) * | 2013-03-27 | 2014-10-06 | Denso Corp | 回転電機の固定子鉄心の製造方法 |
JP2015122893A (ja) * | 2013-12-24 | 2015-07-02 | Jfeスチール株式会社 | モータコアの製造方法 |
JP2016094655A (ja) * | 2014-11-17 | 2016-05-26 | 新日鐵住金株式会社 | らせん巻きコア用電磁鋼板およびその製造方法、らせん巻きコア、らせん巻きコアの製造方法 |
-
2017
- 2017-07-18 WO PCT/JP2017/025915 patent/WO2018016475A1/ja unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01159323A (ja) * | 1987-12-17 | 1989-06-22 | Nippon Steel Corp | 方向性電磁鋼板の鉄損低減装置 |
JPH01159324A (ja) * | 1987-12-17 | 1989-06-22 | Nippon Steel Corp | 方向性電磁鋼板の鉄損値低減装置 |
JPH0992561A (ja) * | 1995-09-22 | 1997-04-04 | Nippon Steel Corp | 回転機器用螺旋コア、およびその製造法 |
JP2014193000A (ja) * | 2013-03-27 | 2014-10-06 | Denso Corp | 回転電機の固定子鉄心の製造方法 |
JP2015122893A (ja) * | 2013-12-24 | 2015-07-02 | Jfeスチール株式会社 | モータコアの製造方法 |
JP2016094655A (ja) * | 2014-11-17 | 2016-05-26 | 新日鐵住金株式会社 | らせん巻きコア用電磁鋼板およびその製造方法、らせん巻きコア、らせん巻きコアの製造方法 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6633025B2 (ja) | コア板の製造方法 | |
KR101659350B1 (ko) | 방향성 전기강판 및 그 제조방법 | |
US11881341B2 (en) | Method of manufacturing core sheet including insulation coating removing step | |
JP2018023271A5 (ja) | ||
EP3395963B9 (en) | Grain-oriented electrical steel sheet and method for manufacturing same | |
WO2018016475A1 (ja) | コア板の製造方法 | |
US11473158B2 (en) | Method for manufacturing alloy ribbon piece | |
JP5023552B2 (ja) | 低鉄損方向性電磁鋼板およびその製造方法 | |
JPS60106915A (ja) | 打抜き性の優れたセミプロセス電磁鋼板の製造方法 | |
CN111742068B (zh) | 方向性电磁钢板 | |
JP6409521B2 (ja) | らせん巻きコア用電磁鋼板およびその製造方法、らせん巻きコア、らせん巻きコアの製造方法 | |
JP7196692B2 (ja) | 合金薄帯片の製造方法 | |
JP7517257B2 (ja) | 帯状鋼板の圧延方法及びステータコアの製造装置 | |
KR20150062034A (ko) | 방향성 전기강판 및 그 제조방법 | |
TWI779904B (zh) | 捲鐵心之製造方法及製造裝置 | |
US20200370200A1 (en) | Method of manufacturing oriented steel plate | |
JP2016113641A (ja) | クラッド鋼板の製造方法、製造設備およびそれによって製造されたクラッド鋼板 | |
CN115109904A (zh) | 制造由金属制成的软磁初级产品的方法 | |
KR101654525B1 (ko) | 무방향성 전기강판 및 그 제조방법 | |
JP2017145453A (ja) | モータ用無方向性電磁鋼板およびその製造方法 | |
JP2010242115A (ja) | 建築構造用リング鋼材の製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 17830991 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 3031179 Country of ref document: CA |
|
ENP | Entry into the national phase |
Ref document number: 20197001927 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112019000962 Country of ref document: BR |
|
ENP | Entry into the national phase |
Ref document number: 2017830991 Country of ref document: EP Effective date: 20190221 |
|
ENP | Entry into the national phase |
Ref document number: 112019000962 Country of ref document: BR Kind code of ref document: A2 Effective date: 20190117 |