JP2011130549A - Multilayer structure and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multilayer structure for suppressing deviation in a radial direction with a simple configuration, and also suppressing deviation in an axial direction. <P>SOLUTION: A first multilayer structure 10A includes first and second steel plates 16a, 16b caulked and laminated via first and second caulking units 14a, 14b, and is formed in a cylindrical shape as a whole. The first caulking unit 14a is displaced in a lamination direction by the sum of the thickness of the first steel plate 16a and that of the second steel plate 16b for formation, and includes a first protrusion 30a including a first projection 34a toward the center of the cylindrical shape. The second caulking unit 14b is displaced in the lamination direction by the sum of the thickness of the first steel plate 16a and that of the second steel plate 16b for formation, and includes a second protrusion 30b including a second projection 34b in a direction opposing the center of the cylindrical shape. In this case, the direction of the first projection 34a alternately differs from that of the second projection 34b, and the first steel plate 16a is laminated to the second steel plate 16b. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a laminated structure that is used for a stator, a rotor, and the like of a motor and is formed by laminating core pieces and a method for manufacturing the same.

  Conventional laminated cores are made by punching out the core pieces with crimped parts in addition to the magnetic poles, pole teeth, slots, etc., and laminating these core pieces and caulking the crimped parts together. (See, for example, Patent Document 1).

  In particular, when the thickness of the iron core is thin, it may be difficult to obtain a sufficient caulking strength of the caulking portion, and the shape of the laminated core may be deteriorated or displaced.

  Therefore, conventionally, in order to solve such a problem, for example, laminated iron cores described in Patent Documents 1 and 2 have been proposed.

  That is, the laminated iron cores described in Patent Documents 1 and 2 are formed on the iron core piece in the laminated iron core that is caulked and laminated via the caulking protrusions and the engagement holes formed on the iron core piece, and the thickness of the iron core piece is In the through-engagement hole formed in the plurality of iron core pieces, the caulking projections having a projection length of 2 times or more are sequentially laminated to the thickness that is substantially the same as the projection length or the thickness that the tip of the caulking projection reaches. It is inserted and caulked and laminated, and the positions where the caulking projections and the through-engagement holes are formed are changed for each predetermined laminating thickness.

  Then, by inserting the caulking protrusion into the through-engagement hole, the outer peripheral side of the caulking protrusion is brought into contact with the entire inner peripheral side of each of the engagement holes provided in the plurality of core pieces constituting the through-engagement hole. The frictional force between each iron core piece and the caulking protrusion can be improved.

Japanese Patent No. 4001294 Japanese Patent No. 4018885 Japanese Patent No. 4255651

  By the way, in the conventional laminated iron core, a plurality of recesses or notches are formed on the inner peripheral side of the through-engagement hole, and when the caulking protrusion is inserted into the through-engagement hole to give a caulking force, A part is configured to be filled with a plurality of recesses or notches formed on the inner peripheral side of the through-engagement hole by plastic deformation.

  However, even if a thin plate is used for the iron core piece, it is difficult to fill the concave portion of the through-engagement hole with the steel plate, and it is possible to prevent radial deviation, but it is possible to prevent axial deviation. There was no measure against it.

  The present invention has been made in view of such problems, and provides a laminated structure and a method for manufacturing the same that can suppress radial displacement and axial displacement with a simple configuration. The purpose is to do.

[1] The laminated structure according to the first aspect of the present invention has a first annular portion composed of at least one first steel plate having at least one first caulking portion, and at least one second caulking portion. A second annular portion composed of at least one second steel sheet, and a laminated structure having a tubular shape as a whole, which is caulked and laminated via the first caulking portion and the second caulking portion, The first caulking portion is formed by displacing the first steel plate and the second steel plate by the total thickness of the first steel plate and the second steel plate in the laminating direction of the steel plates by half punching, and the first convex portion toward the center of the cylindrical shape. The second caulking portion is formed by being displaced by a total plate thickness of the first steel plate and the second steel plate in the laminating direction of the steel plates by half punching, and the cylinder Heading in the opposite direction to the center of the shape The first steel plate and the second steel plate are laminated so that the first protrusion and the second convex portion have different directions alternately, and the second steel plate has a second protrusion having two protrusions. It is characterized by.

[2] In the first aspect of the present invention, the first caulking portion is formed on a cut surface of the first steel plate formed along with the formation of the first protrusion and is directed toward the center of the cylindrical shape. A first notch portion having a convex shape, and the second caulking portion is formed on a cut surface of the second steel plate formed along with the formation of the second protrusion, and the center of the cylindrical shape The first convex portion of the first steel plate of the nth (n = 1, 2,...) Th from the top is the n + 1th from the top. The second convex portion of the second steel plate nth from the top is fitted into the second notch of the second steel plate n + 1 from the top. It is characterized by being fitted.

[3] In the first aspect of the present invention, each of the first convex portion and the second convex portion has an arc shape.

[4] A method for manufacturing a laminated structure according to the second aspect of the present invention is a method for manufacturing a laminated structure in which at least one first steel plate and at least one second steel plate are caulked and laminated via a caulking portion. The first metal plate is formed by being displaced by the total thickness of the first steel plate and the second steel plate in the direction perpendicular to the plate surface by punching and half punching of the metal plate, and has a first convex portion toward the processing center. A first caulking portion formed on the cut surface formed along with the formation of the first protrusion and having a first notch having a convex shape toward the processing center is provided. The first steel plate is produced, and the sheet metal is punched and half-punched to be displaced by the total thickness of the first steel plate and the second steel plate in the direction perpendicular to the plate surface, and the processing center The second convex part going in the opposite direction And a second notch having a convex shape that is formed on the cut surface formed along with the formation of the second protrusion and that faces in a direction opposite to the processing center. A step of producing the second steel plate having two caulking portions, and a caulking step of caulking and laminating the first steel plate and the second steel plate via the first caulking portion and the second caulking portion. In the caulking step, the first caulking portion of the first caulking portion in the first (n = 1, 2,...) First steel plate from the top is the second caulking in the lower second steel plate. It is caulked so as to fit over the first notch portion of the first steel plate n + 1 from the top, over the straight portion of the portion.

  As described above, according to the laminated structure and the manufacturing method thereof according to the present invention, it is possible to suppress radial displacement and axial displacement with a simple configuration.

It is a perspective view which shows the laminated structure (1st laminated structure) which concerns on 1st Embodiment. It is a figure which shows the 1st cyclic | annular part (1st steel plate) which is one of the components of a 1st laminated structure seeing from an upper surface. It is a figure which shows the 2nd cyclic | annular part (2nd steel plate) which is one of the components of a 1st laminated structure seeing from an upper surface. It is a disassembled perspective view which shows the caulking state of a 1st caulking part, a 2nd caulking part, and these 1st caulking parts and a 2nd caulking part. It is a disassembled perspective view which shows the state which laminates | stacks a 1st steel plate and a 2nd steel plate. It is sectional drawing which abbreviate | omits and shows the state which carried out the caulking lamination | stacking of the 1st steel plate and the 2nd steel plate via the 1st caulking part and the 2nd caulking part. It is a process block diagram which shows an example of the manufacturing method of the laminated structure which concerns on this Embodiment. FIG. 8A is an exploded perspective view showing a state in which the first steel plate and the second annular portion, which are constituent elements of the laminated structure (second layer structure) according to the second embodiment, are laminated, and FIG. It is a perspective view which shows a 2nd laminated structure. FIG. 9A shows a first annular portion (three first steel plates) and a second annular portion (one second steel plate) which are constituent elements of the laminated structure (third layer structure) according to the third embodiment. And FIG. 9B is a perspective view showing a third laminated structure. FIG. 10A shows a first annular portion (one first steel plate) and a second annular portion (three second steel plates) which are constituent elements of the laminated structure (fourth layer structure) according to the fourth embodiment. And FIG. 10B is a perspective view showing a fourth laminated structure. FIG. 11A shows a first annular portion (three first steel plates) and a second annular portion (three second steel plates) which are constituent elements of the laminated structure (fifth layer structure) according to the fifth embodiment. And FIG. 11B is a perspective view showing a fifth laminated structure.

  Hereinafter, embodiments of a laminated structure and a manufacturing method thereof according to the present invention will be described with reference to FIGS.

  First, a laminated structure according to the first embodiment (hereinafter referred to as a first laminated structure 10A) constitutes, for example, a motor stator as shown in FIG. The parts 12A and the second annular part 12B are alternately stacked.

  As shown in FIG. 2, the first annular portion 12A is composed of one annular first steel plate 16a having a plurality of (for example, twelve) first caulking portions 14a, and the second annular portion 12B is shown in FIG. As shown in FIG. 4, the second steel plate 16b is a single ring having a plurality of (for example, twelve) second caulking portions 14b. In the present embodiment, twelve first caulking portions 14a are provided at equal intervals on the first steel plate 16a, and twelve second caulking portions 14b are provided at equal intervals on the second steel plate 16b.

  As shown in FIG. 1, in the first laminated structure 10A, the first steel plate 16a and the second steel plate 16b are caulked and laminated via the first caulking portion 14a and the second caulking portion 14b, and the tube as a whole. Has a shape. An inner hole 18 is formed in the center of the first laminated structure 10A in the axial direction, and a rotor is disposed in the inner hole 18, for example.

  As shown in FIG. 2, in addition to the first caulking portion 14a, the first steel plate 16a has a first inner hole 18a formed at the center and a circumferential portion (first yoke portion 20a) to the first inner hole 18a. A first magnetic pole portion 24a having a large number of first pole teeth 22a formed so as to project toward the first pole teeth 22a and a first slot 26a formed between the first pole teeth 22a and wound with a coil.

  As shown in FIG. 4, the first caulking portion 14a of the first steel plate 16a has a first protrusion 30a and a first notch 32a.

  The first protrusion 30a is formed by being displaced by the total thickness of the first steel plate 16a and the second steel plate 16b in the laminating direction (the laminating direction of the first steel plate 16a and the second steel plate 16b) by half punching, and The first convex portion 34a is directed toward the center (inward in the radial direction) of the cylindrical shape (see FIG. 1).

  Specifically, the first protrusion 30a includes a first flat portion 36a displaced by the total thickness of the first steel plate 16a and the second steel plate 16b, and two first support portions 38a plastically deformed by half punching. (Parts supporting the first flat portion 36a on the first steel plate 16a). The first flat portion 36a has a substantially rectangular shape when viewed from above, and has a positional relationship in which the direction of the long axis and the radial direction of the first steel plate 16a are orthogonal to each other. Of the two side surfaces (the first side surface 40a and the second side surface 40b) of the first flat portion 36a, the first convex portion 34a described above is formed on the first side surface 40a facing the center of the cylindrical shape. . In the example of FIG. 4, an example is shown in which the first convex portion 34 a is formed at the central portion in the length direction of the first side surface 40 a. The upper surface of the first convex portion 34a and the first flat portion 36a are flush with each other. Therefore, the second steel plate 16b is interposed between the upper surface of the first convex portion 34a and the lower surface of the first steel plate 16a. A gap t1 corresponding to the plate thickness is formed.

  The 1st notch part 32a is formed in the cut surface of the 1st steel plate 16a formed with formation of the 1st projection part 30a, and has the shape made convex toward the inner direction of radial direction. Specifically, with the formation of the first protrusion 30a, the first steel plate 16a has first corresponding to the first side face 40a and the second side face 40b of the first flat part 36a in the first protrusion 30a. The cut surface 42a and the second cut surface 42b are formed, and among these, the first cut surface 42a is formed with a first cutout portion 32a having a convex shape toward the radially inward direction.

  Similarly to the first steel plate 16a, the second steel plate 16b has a second inner hole 18b formed at the center and a circumferential portion (second yoke portion 20b) in addition to the second caulking portion 14b, as shown in FIG. The second magnetic pole portion 24b having a number of second pole teeth 22b formed to project from the second inner hole 18b to the second inner hole 18b, and the second slot formed between the second pole teeth 22b and in which the coil is wound. 26b.

  As shown in FIG. 4, the second caulking portion 14b of the second steel plate 16b has a second protrusion 30b and a second notch 32b.

  The second protrusion 30b is formed by displacing the total thickness of the first steel plate 16a and the second steel plate 16b in the stacking direction by half-punching, and the direction opposite to the direction toward the center of the cylindrical shape ( It has the 2nd convex part 34b which goes to (outward direction of a diameter direction).

  Specifically, the second protrusion 30b includes a second flat portion 36b displaced by the total thickness of the first steel plate 16a and the second steel plate 16b, and two second support portions 38b plastically deformed by half punching. (Parts supporting the second flat portion 36b on the second steel plate 16b). The second flat portion 36b has a substantially rectangular shape when viewed from the upper surface, and has a positional relationship in which the direction of the long axis and the radial direction of the second steel plate 16b are orthogonal to each other. Of the two side surfaces (third side surface 40c and fourth side surface 40d) of the second flat portion 36b, the above-described second convex portion 34b is formed on the fourth side surface 40d opposite to the center of the cylindrical shape. ing. In the example of FIG. 4, an example is shown in which the second convex portion 34 b is formed at the central portion in the length direction of the fourth side surface 40 d. The upper surface of the second convex portion 34b and the second flat portion 36b are flush with each other. Therefore, the first steel plate 16a is interposed between the upper surface of the second convex portion 34b and the lower surface of the second steel plate 16b. A gap t2 corresponding to the plate thickness is formed.

  The 2nd notch part 32b is formed in the cut surface of the 2nd steel plate 16b formed with formation of the 2nd projection part 30b, and has the shape made convex toward the radial direction outward. Specifically, with the formation of the second protrusion 30b, the second steel plate 16b has a third surface corresponding to the third side surface 40c and the fourth side surface 40d of the second flat portion 36b in the second protrusion 30b. The cut surface 42c and the fourth cut surface 42d are formed, and the second cut portion 32b having a convex shape toward the outer side in the radial direction is formed on the fourth cut surface 42d.

  And when laminating | stacking the 1st steel plate 16a and the 2nd steel plate 16b and producing 10 A of 1st laminated structures, as shown in FIG. 5, the 1st steel plate 16a, the 2nd steel plate 16b, the 1st steel plate 16a, the 1st steel plate 16a, Two steel plates 16b are stacked alternately. At this time, the first caulking portion 14a of the first steel plate 16a and the second caulking portion 14b of the second steel plate 16b are laminated so as to face each other, and the first caulking punch of the first steel plate 16a is used using a caulking punch. The part 14a and the second caulking part 14b of the second steel plate 16b are caulked. At this time, as shown in FIG. 4 and FIG. 6, the first steel plate 16 a has the first convex portion 34 a of the first caulking portion 14 a and the second convex portion 34 b of the second caulking portion 14 b alternately in different directions. And the second steel plate 16b are laminated, the first convex portion 34a of the first caulking portion 14a in the n-th (n = 1, 2,...) First steel plate 16a from above is from above. The 2nd convex part 34b of the 2nd crimping part 14b in the 1st notch part 32a of the 1st crimping part 14a in the n + 1st 1st steel sheet 16a is n + 1 from the top. The second second steel plate 16b is fitted into the second notch portion 32b of the second caulking portion 14b.

  More specifically, the first convex portion 34a of the first caulking portion 14a in the n-th first steel plate 16a from the top is a straight portion of the second caulking portion 14b in the second steel plate 16b below the first caulking portion 14a. The first caulking portion 14a of the first caulking portion 14a of the (n + 1) th first steel plate 16a from the top is fitted over the cut surface 42c, and the second caulking portion 14b of the nth second steel plate 16b from the upper side is fitted. The second protrusion 34b is a straight portion of the first caulking portion 14a in the lower first steel plate 16a, that is, the second caulking portion of the second steel plate 16b n + 1 from the top, over the second cut surface 42b. It fits into the second cutout portion 32b of 14b.

  The shape of the first convex portion 34a of the first caulking portion 14a and the second convex portion 34b of the second caulking portion 14b is as low as possible with respect to the straight portions (the third cut surface 42c and the second cut surface 42b). In order to achieve this, it is preferable to use an arc. Moreover, if each protrusion amount of the 1st convex part 34a of the 1st crimping part 14a and the 2nd convex part 34b of the 2nd crimping part 14b is large, a linear part (3rd cutting surface 42c and 2nd cutting surface 42b will also be mentioned above. ), The protrusion amount of the first protrusion 34a is 5% or more and 15% or less of the plate thickness of the first steel plate 16a, and the protrusion amount of the second protrusion 34b is the second steel plate. It is preferably 5% or more and 15% or less of the plate thickness of 16b. Of course, the thickness of the first steel plate 16a and the second steel plate 16b may be 5% or more and 15% or less of the plate thickness based on the thinner plate thickness. In the present embodiment, the plate thicknesses of the first steel plate 16a and the second steel plate 16b are the same, and the protruding amounts of the first convex portion 34a and the second convex portion 34b are approximately 10% of the plate thickness. (9% to 11%).

  As described above, the first laminated structure 10A includes the caulking portions (the first caulking portion 14a and the second caulking portion 14b) having the convex portions (the first convex portion 34a and the second convex portion 34b) in different directions. Since the first steel plate 16a and the second steel plate 16b are caulked and laminated via the caulking portion, the nth first convex portion 34a from the top is caulked to the n + 1 first notch portion 32a from the top. At the same time, the n-th second convex portion 34b from the top is caulked to the (n + 1) -th second notch portion 32b from the top, so that radial displacement is suppressed. Moreover, since the nth first convex portion 34a from the top and the nth second convex portion 34b from the top protrude in opposite directions, the nth first convex portion 34a is the second steel plate 16b in the lower layer. The movement in the axial direction is suppressed by the straight line portion (third cut surface 42c), and the nth second convex portion 34b is moved in the axial direction by the straight line portion (second cut surface 42b) of the first steel plate 16a below it. As a result, the axial displacement hardly occurs or is largely suppressed.

  Next, a manufacturing method of the first laminated structure 10A will be described with reference to the process block diagram of FIG.

  Initially, the process of producing the 1st steel plate 16a is demonstrated.

  First, in step S1 of FIG. 7, the first reference having a diameter slightly smaller than the diameter of the first inner hole 18a with respect to the first sheet metal (thin metal formed in a thin and flat shape: not shown). Holes are formed by punching.

  Thereafter, in step S2, a large number of through holes for slots that will later become the first slots 26a are formed by punching around the first reference holes.

  Thereafter, in step S3, two cut surfaces (a first cut surface 42a and a second cut surface 42b) are formed at positions where the first caulking portion 14a is formed, around the large number of through holes for slots. The two cut surfaces are formed in a positional relationship in which the radial direction from each longitudinal center point toward the center of the first reference hole and the length direction of each cut surface are orthogonal to each other. Of the two cut surfaces, the central portion in the length direction of the first cut surface 42a near the first reference hole is cut into an arc shape that curves toward the center of the first reference hole. This arc-shaped cut portion will later become the first cutout portion 32a and the first convex portion 34a. The second cut surface 42b is linear.

  After that, in step S4, a portion between the first cut surface 42a and the second cut surface 42b is half-punched with a punch, whereby the first protrusion 30a (the first flat portion 36a and the two first support portions). Forming part 38a). As shown in FIG. 4, the half-cutting process causes the first side surface 40 a facing the center of the first reference hole, of the two side surfaces (first side surface 40 a and second side surface 40 b) of the first flat portion 36 a. The above-described arc-shaped first convex portion 34a is formed, while the first cut surface 42a is formed with the arc-shaped first cutout portion 32a.

  Steps S3 and S4 described above can be performed simultaneously. That is, the first cut surface 42a and the second cut surface 42b and the first protrusion 30a (the first flat portion 36a and the two first support portions 38a) can be formed simultaneously.

  Thereafter, in step S5, a first inner hole 18a having a diameter larger than that of the first reference hole is formed by punching. At this stage, the first inner hole 18a, a number of first pole teeth 22a, and a number of first slots 26a are formed.

  Thereafter, in step S6, the outer peripheral portion of the first yoke portion 20a is punched out to complete the annular first steel plate 16a shown in FIG.

  Next, the process for producing the second steel plate 16b will be described. You may make it perform the preparation process of this 2nd steel plate 16b in parallel with preparation of the 1st steel plate 16a.

  First, in step S101 of FIG. 7, the second reference having a diameter slightly smaller than the diameter of the second inner hole 18b with respect to the second sheet metal (thin metal formed in a thin flat shape: not shown). Holes are formed by punching.

  Thereafter, in step S102, a large number of through holes for slots that will later become the second slots 26b are formed by punching around the second reference holes.

  Thereafter, in step S103, two cut surfaces (a third cut surface 42c and a fourth cut surface 42d) are formed at positions where the second caulking portion 14b is formed, around the large number of through holes for slots. The two cut surfaces are formed in a positional relationship in which the radial direction from each longitudinal center point toward the center of the second reference hole and the length direction of each cut surface are orthogonal to each other. Of the two cut surfaces, the central portion in the length direction of the fourth cut surface 42d away from the second reference hole is cut into an arc shape that curves in a direction away from the center of the second reference hole in the radial direction. . This arc-shaped cut portion will later become the second cutout portion 32b and the second convex portion 34b. The third cut surface 42c is linear.

  Thereafter, in step S104, the portion between the third cut surface 42c and the fourth cut surface 42d is half-punched with a punch, whereby the second protrusion 30b (the second flat portion 36b and the two second support portions). Forming part 38b). As shown in FIG. 4, the fourth side surface 40 d that is apart from the second reference hole among the two side surfaces (third side surface 40 c and fourth side surface 40 d) of the second flat portion 36 b is subjected to the half-cutting process as described above. The arc-shaped second convex portion 34b is formed, while the arc-shaped second notch portion 32b is formed on the fourth cut surface 42d.

  Steps S103 and S104 described above can be performed simultaneously. That is, it is possible to simultaneously form the third cut surface 42c and the fourth cut surface 42d, and the second protrusion 30b (the second flat portion 36b and the two second support portions 38b).

  Thereafter, in step S105, the second inner hole 18b having a diameter larger than that of the second reference hole is formed by punching. At this stage, the second inner hole 18b, a number of second pole teeth 22b, and a number of second slots 26b are formed.

  Thereafter, in step S106, the outer peripheral portion of the second yoke portion 20b is punched out to complete the annular second steel plate 16b shown in FIG.

  And in step S201 of FIG. 4, it laminates | stacks alternately like the completed 1st steel plate 16a, 2nd steel plate 16b, 1st steel plate 16a, 2nd steel plate 16b .... At this time, the first caulking portion 14a of the first steel plate 16a and the second caulking portion 14b of the second steel plate 16b are laminated so as to face each other.

  Thereafter, in step S202, the first caulking portion 14a of the first steel plate 16a and the second caulking portion 14b of the second steel plate 16b are caulked using a caulking punch. As the caulking punch, a punch having a flat tip and an outer shape that is the same as the rectangular shape of the first flat portion 36a excluding the first convex portion 34a is used. By this caulking operation, the first convex portion 34a of the first caulking portion 14a in the n-th first steel plate 16a from the top is the straight portion of the second caulking portion 14b in the lower second steel plate 16b, that is, the third cutting. Overcoming the surface 42c, it fits into the first notch 32a of the first caulking portion 14a of the (n + 1) th first steel plate 16a from the top, and the second caulking portion 14b of the nth second steel plate 16b from the top. The convex portion 34b passes over the straight portion of the first caulking portion 14a in the lower first steel plate 16a, i.e., the second cutting surface 42b, and the second caulking portion 14b of the n + 1-th second steel plate 16b from the top. It fits into the two notches 32b.

  When the caulking in step S202 described above is completed, the first stacked structure 10A shown in FIG. 1 is completed.

  As described above, in the manufacturing method according to the present embodiment, the first caulking portion 14a of the first steel plate 16a and the second caulking portion 14b of the second steel plate 16b are stacked while facing each other, and the nth from the top. The first convex portion 34a of the first caulking portion 14a of the first steel plate 16a is fitted into the first notch portion 34a of the first caulking portion 14a of the (n + 1) th first steel plate 16a, and the nth from the top. Since the second convex portion 32b of the second caulking portion 14b in the second steel plate 16b is fitted to the second notch portion 34b of the second caulking portion 14b of the n + 1-th second steel plate 16b from the top, the radial direction The first laminated structure 10A that can suppress the deviation of the first laminated structure and the axial deviation can be easily manufactured, and the yield of the first laminated structure 10A can be improved.

  In addition, if the thickness of the 1st steel plate 16a and the 2nd steel plate 16b is the same, the punching process shown in step S1-S6 and step S101-S106, a half punching process, etc. will be performed, for example with respect to the same 1st sheet metal. You may make it produce the 1 steel plate 16a and the 2nd steel plate 16b. Thereby, man-hour reduction and simplification of process management can be achieved.

  Next, a stacked structure according to the second embodiment (hereinafter referred to as a second stacked structure 10B) will be described with reference to FIGS. 8A and 8B.

  As shown in FIGS. 8A and 8B, the second laminated structure 10B has substantially the same configuration as the first laminated structure 10A described above, but the first caulking portion 14a and the second caulking portion on the first steel plate 16a. 14b, and the second caulking portion 14a and the second caulking portion 14b are also provided on the second steel plate 16b. Specifically, for example, six first caulking portions 14a are provided at equal intervals in both the first steel plate 16a and the second steel plate 16b, and the six second caulking portions 14b are respectively provided between the first caulking portions 14a. Provide at intervals. By providing the same number of the first caulking portions 14a and the second caulking portions 14b, it is possible to uniformly apply the force for suppressing the radial shift and the force for suppressing the axial shift.

  And when laminating | stacking these 1st steel plates 16a and 2nd steel plates 16b and producing the 2nd laminated structure 10B, the 1st steel plate 16a, the 2nd steel plate 16b, the 1st steel plate 16a, the 2nd steel plate 16b ... And so on. At this time, the first caulking portion 14a of the first steel plate 16a and the second caulking portion 14b of the second steel plate 16b are opposed to each other, and further, the second caulking portion 14b of the first steel plate 16a and the second steel plate 16b The first caulking portion 14a is opposed to each other. Of course, in the present embodiment, since the first caulking portion 14a and the second caulking portion 14b are provided at equal intervals, for example, the first caulking portion 14a of the first steel plate 16a and the second caulking portion of the second steel plate 16b. If the portion 14b is opposed to each other, the second caulking portion 14b of the first steel plate 16a and the first caulking portion 14a of the second steel plate 16b are simultaneously opposed to each other, and the operation is simple.

  The first caulking portion 14a of the first steel plate 16a and the second caulking portion 14b of the second steel plate 16b are caulked, and the second caulking portion 14b of the first steel plate 16a and the first caulking portion 14a of the second steel plate 16b are caulked. Thus, the first convex portion 34a of the first caulking portion 14a in the n-th first steel plate 16a from the top is a straight portion of the second caulking portion 14b in the second steel plate 16b, that is, the third cut surface 42c. 2nd convex part of the 2nd crimping part 14b in the 1st notch part 32a of the 1st crimping part 14a in the n + 1st 1st steel sheet 16a from the top, and the nth 1st steel sheet 16a from the top 34b is the second caulking portion of the first steel plate 16a n + 1 from the top, over the straight portion of the first caulking portion 14a in the second steel plate 16b, that is, the second cut surface 42b. The be fitted to the second cut-out portion 32b of 14b. The same applies to the second steel plate 16b.

  Since the first caulking portion 14a and the second caulking portion 14b are provided in one steel plate, if the thickness of the first steel plate 16a and the second steel plate 16b is the same, for example, the first steel plate 16a (or the second steel plate 16b). It is also possible to produce the second laminated structure 10B using only

  In addition, for example, when the first steel plate 16a and the second steel plate 16b are laminated, the formation position and the number of each formation of the first caulking portion 14a and the second caulking portion 14b on the first steel plate 16a and the second steel plate 16b are as follows. As long as the first caulking portion 14a and the second caulking portion 14b satisfy the positional relationship facing each other, it is optional.

  Next, a stacked structure according to a third embodiment (hereinafter referred to as a third stacked structure 10C) will be described with reference to FIGS. 9A and 9B.

  As shown in FIGS. 9A and 9B, the third stacked structure 10C has substantially the same configuration as the first stacked structure 10A described above, but the first annular portion 12A includes a plurality of (for example, three) first annular portions 12A. The arc-shaped first steel plate 16a is configured by being combined in an annular shape, and the second annular portion 12B is different in that it is configured by one annular second steel plate 16b.

  When the first annular portion 12A and the second annular portion 12B are laminated to produce the third laminated structure 10C, the first annular portion 12A, the second annular portion 12B, the first annular portion 12A, the second In this case, the joining portions of the three first steel plates 16a constituting each first annular portion 12A may be aligned in the laminating direction. Alternatively, the first annular portions 12A may be stacked while being rotated by 60 ° so that the joining portions of the first steel plates 16a are not aligned in the stacking direction.

  Next, a stacked structure according to a fourth embodiment (hereinafter referred to as a fourth stacked structure 10D) will be described with reference to FIGS. 10A and 10B.

  As shown in FIGS. 10A and 10B, in the fourth laminated structure 10D, the first annular portion 12A is composed of one annular first steel plate 16a, contrary to the above-described third laminated structure 10C. The second annular portion 12B is different in that a plurality of (for example, three) arcuate second steel plates 16b are annularly combined.

  When the fourth laminated structure 10D is manufactured by laminating the first annular portion 12A and the second annular portion 12B, the first annular portion 12A, the second annular portion 12B, the first annular portion 12A, the second In this case, the joint portions of the three second steel plates 16b constituting each second annular portion 12B may be aligned in the stacking direction. Alternatively, the second annular portions 12B may be stacked while being rotated by 60 ° so that the joining portions of the second steel plates 16b are not aligned in the stacking direction.

  Next, a stacked structure according to a fifth embodiment (hereinafter referred to as a fifth stacked structure 10E) will be described with reference to FIGS. 11A and 11B.

  As shown in FIGS. 11A and 11B, the fifth stacked structure 10E has substantially the same configuration as the first stacked structure 10A described above, but the first annular portion 12A has a plurality of (for example, three) circles. The arc-shaped first steel plate 16a is configured by being annularly combined, and the second annular portion 12B is also different in that a plurality (for example, three) of arc-shaped second steel plates 16b are configured by being combined annularly.

  When the first steel plate 16a and the second steel plate 16b are laminated to produce the fifth laminated structure 10E, the first annular portion 12A, the second annular portion 12B, the first annular portion 12A, and the second annular portion. 12B..., But in this case, the joint portions of the three first steel plates 16a constituting the first annular portion 12A and the three pieces constituting the second annular portion 12B. The joining portion of the second steel plate 16b may be aligned in the laminating direction, or the first annular portion 12A is laminated by rotating the first annular portion 12A and the second annular portion 12B by 60 °. The joining portions of the three first steel plates 16a that constitute the first and second joining portions of the second steel plates 16b that constitute the second annular portion 12B may not be aligned in the stacking direction.

  Also in the third laminated structure to the fifth laminated structure described above, the first caulking portion and the second caulking portion are provided in a mixed manner in both the first steel plate and the second steel plate, similarly to the second laminated structure. It may be.

  In the third to fifth laminated structures described above, the first caulking portion and the second caulking portion are provided on each of the first steel plate and the second steel plate, similarly to the second laminated structure described above. May be.

  Further, in the third laminated structure to the fifth laminated structure, each of the three arc-shaped steel plates 16a is annularly combined to form one annular portion. Alternatively, one annular portion may be configured by combining four or more steel plates in an annular shape. Moreover, in the fifth laminated structure, the number of first steel plates constituting one first annular portion may be different from the number of second steel plates constituting one second annular portion.

  In addition, the laminated structure and the manufacturing method thereof according to the present invention are not limited to the above-described embodiments, and various configurations can be adopted without departing from the gist of the present invention.

10A to 10E ... 1st laminated structure-5th laminated structure 12A ... 1st annular part 12B ... 2nd annular part 14a ... 1st crimping part 14b ... 2nd crimping part 16a ... 1st steel plate 16b ... 2nd steel plate 30a ... 1st protrusion part 30b ... 2nd protrusion part 32a ... 1st notch part 32b ... 2nd notch part 34a ... 1st convex part 34b ... 2nd convex part 36a ... 1st flat part 36b ... 2nd flat part 40a -40d ... 1st side surface-4th side surface 42a-42d ... 1st cut surface-4th cut surface

Claims (4)

A first annular portion composed of at least one first steel plate having at least one first caulking portion and a second annular portion composed of at least one second steel plate having at least one second caulking portion. Are laminated structures that are caulked and laminated via the first caulking part and the second caulking part, and have a cylindrical shape as a whole,
The first caulking portion is formed by being displaced by a total plate thickness of the first steel plate and the second steel plate in the laminating direction of the steel plates by half-punching processing and is directed to the center of the cylindrical shape A first protrusion having
The second caulking part is formed by being displaced by a total thickness of the first steel plate and the second steel plate in the laminating direction of the steel plates by half blanking, and in a direction opposite to the center of the cylindrical shape. Having a second protrusion having a second convex portion toward it;
A laminated structure in which the first steel plate and the second steel plate are laminated such that the first convex portion and the second convex portion are alternately different in direction. The laminated structure according to claim 1, wherein
The first caulking portion is formed on a cut surface of the first steel plate formed along with the formation of the first protrusion, and has a first notch having a convex shape toward the center of the cylindrical shape. And
The second caulking portion is formed on the cut surface of the second steel plate formed along with the formation of the second protrusion, and has a convex second shape directed in a direction opposite to the center of the cylindrical shape. Has a notch,
The first convex portion of the first steel plate nth (n = 1, 2,...) From the top is fitted to the first notch portion of the first steel plate n + 1 from the top,
The laminated structure, wherein the second convex portion of the second steel plate nth from the top is fitted to the second notch portion of the second steel plate n + 1 from the top. The laminated structure according to claim 1, wherein
Each of the first convex portion and the second convex portion has a circular arc shape. A method for producing a laminated structure in which at least one first steel plate and at least one second steel plate are caulked and laminated via a caulking portion,
A first protrusion having a first convex portion formed by being displaced by a total plate thickness of the first steel plate and the second steel plate in a direction perpendicular to the plate surface by punching and half punching of the sheet metal, and toward the processing center. The first caulking portion is provided with a first caulking portion that is formed on the cut surface formed along with the formation of the first protrusion and the first notch having a convex shape toward the processing center. A step of producing one steel plate;
A second protrusion that is formed by being displaced by the total thickness of the first steel plate and the second steel plate in the direction perpendicular to the plate surface by punching and half-punching of the metal plate, and is directed in the direction opposite to the processing center. And a second notch having a convex shape that is formed on a cut surface that is formed along with the formation of the second protrusion and that faces in a direction opposite to the processing center. Producing the second steel plate having the second caulking portion having,
A caulking step of caulking and stacking the first steel plate and the second steel plate via the first caulking part and the second caulking part,
In the caulking step, the first convex portion of the first caulking portion in the n-th (n = 1, 2,...) First steel plate from the top is the second caulking portion in the lower second steel plate. A method of manufacturing a laminated structure, wherein the first notched portion of the first steel plate n + 1 from above is crimped so as to fit over the straight portion.

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