Laminated iron core manufacturing device and laminated iron core manufacturing method

Abstract

To provide a device and a method that can efficiently manufacture a laminated iron core in which a strip-shaped core piece forming portion is wound spirally.SOLUTION: A laminated iron core manufacturing device includes a cylindrical roll member that extends axially along a central axis and has an iron core piece forming portion wound around its outer peripheral surface, a plurality of columnar members that are positioned radially outward of the roll member, lined up in a circumferential direction centered on the central axis, and each extend in an axial direction, and a drive unit that rotates the roll member and the plurality of columnar members around the central axis. The radially outer side of the columnar members that is farthest radially from the outer peripheral surface of the roll member is positioned at a distance from the outer peripheral surface of the roll member that is equal to or shorter than the length of a tooth portion in a radial direction, and the drive unit rotates the roll member and the plurality of columnar members around the central axis with the plurality of columnar members inserted between the plurality of tooth portions.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a manufacturing apparatus for a laminated core and a manufacturing method for a laminated core. [Background technology]

[0002] Conventionally, there is known a device for spirally winding a strip-shaped core piece forming portion while deforming it in one direction in the width direction. One such device is a winding device having a rolling roll that bends the strip-shaped core material into a spiral shape and a take-up roller that takes up the strip-shaped thin plate extruded from the rolling roll. The take-up roller has a circumferential surface provided with an alignment guide that protrudes in the axial direction and engages with an inner peripheral notch in the strip-shaped thin plate (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-224817 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventionally, by forming the core piece forming portion in a spiral shape using a roll member having a protrusion on its outer circumferential surface that is inserted into the slot, it is possible to obtain spiral core pieces in which the positions of the teeth are aligned in the stacking direction. However, the spiral core pieces tend to spring back, returning to their original shape, which can cause the protrusion to radially slip out of the slot. Therefore, it is necessary to wind the core piece forming portion while restricting the radial movement of the spiral core pieces. Therefore, conventional manufacturing methods may not be very efficient.

[0005] Therefore, there is a need for an apparatus that can efficiently manufacture a laminated core in which strip-shaped core piece forming portions are wound in a spiral shape.

[0006] An object of the present invention is to provide an apparatus and method capable of efficiently manufacturing a laminated core in which a band-shaped core piece forming portion is wound spirally. [Means for solving the problem]

[0007] According to an exemplary embodiment of the present invention, a laminated core manufacturing apparatus spirally winds a plate-shaped core piece forming portion having a band-shaped back yoke forming portion and a plurality of teeth extending from the back yoke forming portion in one width direction while deforming the plate-shaped core piece forming portion in one width direction. The laminated core manufacturing apparatus includes a cylindrical roll member extending axially along a central axis and having the core piece forming portion wound around its outer circumferential surface, a plurality of columnar members positioned radially outward of the roll member in a circumferential direction around the central axis and each extending in the axial direction, and a drive unit that rotates the roll member and the plurality of columnar members about the central axis. The columnar members have their radially outermost ends farthest from the outer circumferential surface of the roll member at a distance equal to or shorter than the length of the teeth in the radial direction. The driving portion rotates the roll member and the plurality of columnar members about the central axis with the plurality of columnar members inserted between the plurality of teeth.

[0008] A laminated core manufacturing method according to an exemplary embodiment of the present invention is a method for manufacturing a laminated core using the laminated core manufacturing apparatus. The laminated core manufacturing method includes a winding step of inserting the columnar members between circumferentially adjacent ones of the plurality of teeth in the core segment forming portion, and rotating the roll member, the plurality of columnar members, and the turntable to deform the core segment forming portion in one direction in the width direction and wind it spirally around the outer circumferential surface of the roll member to form spiral core segments, and a roll member detachment step of axially detaching the roll member from the spiral core segments by moving the turntable downward relative to the roll member with lower ends of the plurality of columnar members fixed. [Effects of the Invention]

[0009] According to the present invention, a laminated core in which a band-shaped core piece forming portion is wound spirally can be efficiently manufactured. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view showing a schematic configuration of a laminated core manufactured by the laminated core manufacturing apparatus according to the first embodiment. [Figure 2] FIG. 2 is an exploded plan view of the laminated core. [Figure 3] FIG. 3 is a perspective view showing a schematic configuration of a manufacturing apparatus for the laminated iron core according to the first embodiment. [Figure 4] FIG. 4 is a perspective view of the manufacturing apparatus of FIG. 3 as seen from another direction. [Figure 5] FIG. 5 is a side view schematically showing the roll member, the columnar member, and the rotary table. [Figure 6] FIG. 6 is a plan view schematically showing the roll members, the columnar members, and the rotary table. [Figure 7] FIG. 7 is a diagram schematically showing a state in which the core piece forming portions are supplied to the roll member. [Figure 8] FIG. 8 is a view showing the roll member being rotated with the core piece forming portions being supplied. [Figure 9] FIG. 9 is a diagram of a punched steel plate. [Figure 10] FIG. 10 is a diagram showing the core pieces formed by being wound around a roll member. [Figure 11] FIG. 11 is a side view schematically showing a manufacturing apparatus according to the second embodiment. [Figure 12] FIG. 12 is a diagram showing a state in which the roll member is removed from the turntable. [Figure 13] FIG. 13 is a diagram illustrating the core pieces formed by being wound around a roll member. [Figure 14]FIG. 14 is a diagram showing a state in which a rotating table to which a plurality of pillar-shaped members are fixed is moved in the axial direction relative to the roll members. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. The same or corresponding parts in the drawings are designated by the same reference numerals, and their description will not be repeated. Furthermore, the dimensions of the components in each drawing do not faithfully represent the actual dimensions of the components and the dimensional ratios of the components.

[0012] In the following description, in the laminated iron core manufacturing apparatus 1, the direction parallel to the central axis P of the roll member is referred to as the axial direction, the direction perpendicular to the central axis P is referred to as the radial direction, and the direction along the arc centered on the central axis P is referred to as the circumferential direction.

[0013] Furthermore, in the laminated core 80 manufactured by the laminated core manufacturing apparatus 1 of the present invention, the direction parallel to the central axis Q of the laminated core 80 is referred to as the axial direction, the direction perpendicular to the central axis Q is referred to as the radial direction, and the direction along the arc centered on the central axis Q is referred to as the circumferential direction.

[0014] In the following description, "equivalent" does not only refer to strict equality, but also includes cases where the same can be considered to be substantially equal.

[0015] In the following description, expressions such as "fix," "connect," and "attach" include not only cases where members are directly fixed to each other, but also cases where members are fixed via other members. In other words, in the following description, expressions such as "fix" include both direct and indirect fixation of members to each other.

[0016] (Embodiment 1) 1 to 8, a manufacturing apparatus 1 for a laminated core 80 according to a first exemplary embodiment of the present invention will be described. The manufacturing apparatus 1 is an apparatus for manufacturing a laminated core 80 by spirally winding a strip-shaped core piece forming portion 71 while deforming it in one direction in the width direction.

[0017] (Laminated core configuration) First, a brief description will be given of the laminated core 80 manufactured by the manufacturing apparatus 1 with reference to Figures 1 and 2. As shown in Figure 1, the laminated core 80 has a cylindrical shape extending along the central axis Q. In this embodiment, the laminated core 80 is a spiral laminated core in which plate-shaped core pieces 81 extending spirally along the central axis Q are stacked in the thickness direction.

[0018] The core piece 81 has a back yoke portion 82 extending in the circumferential direction of the laminated core 80, and a plurality of teeth portions 83 extending radially inward from the back yoke portion 82 of the laminated core 80. In the laminated core 80, the back yoke portion 82 and the plurality of teeth portions 83 are each laminated in the thickness direction.

[0019] When viewed in the axial direction of the laminated core 80, slots 84 extending in the axial direction and opening radially inward are located between circumferentially adjacent teeth 83 among the multiple teeth 83. Coil wire (not shown) is inserted into the slots 84.

[0020] Fig. 2 is a view of the laminated core 80 viewed in the axial direction. Fig. 2 shows an exploded view of a portion of the laminated core 80. As shown in Fig. 2, the spiral core piece 81 is obtained by forming the strip-shaped core piece forming portion 71 into a spiral shape.

[0021] The core piece forming portion 71 has a strip-shaped back yoke forming portion 72 and a plurality of teeth 83 extending from the back yoke forming portion 72 to one side in the width direction of the back yoke forming portion 72 .

[0022] The core piece forming portion 71 is spirally wound and laminated in the thickness direction by the manufacturing apparatus 1. That is, the manufacturing apparatus 1 spirally winds the core piece forming portion 71 while deforming it in one direction in the width direction, thereby forming the core pieces 81 of the laminated core 80 shown in FIG.

[0023] As shown in Fig. 1, the axial length of the laminated core 80 is L81. As shown in Fig. 2, the length of the teeth portions 83 is L82. The angle between adjacent teeth portions 83 in the circumferential direction is D83. The length of the teeth portions 83 is the length from the radially inner end face of the back yoke portion 82 to the radially inner end face of the teeth portions 83 in the laminated core 80.

[0024] (Configuration of manufacturing equipment) Next, a manufacturing apparatus 1 for manufacturing the laminated core 80 having the above-described configuration will be described with reference to Fig. 3 to Fig. 8. For the sake of explanation, Fig. 5 to Fig. 8 show the manufacturing apparatus 1 in a schematic manner and some of the constituent members are shown in a simplified form.

[0025] 3 and 4, the manufacturing apparatus 1 includes a turntable 2, a roll member 3, a plurality of columnar members 4, a guide unit 5, and a drive unit 6. The guide unit 5 and the drive unit 6 are supported by a base of the manufacturing apparatus 1 (not shown).

[0026] The rotating table 2 has a circular shape when viewed in the axial direction. The rotating table 2 is connected to the lower ends of the roll member 3 and the plurality of columnar members 4. The rotating table 2 rotates around the central axis P of the roll member 3 together with the roll member 3 and the plurality of columnar members 4, which will be described later. The rotating table 2 may also have a rectangular or polygonal shape when viewed in the axial direction.

[0027] The roll member 3 is cylindrical. In this embodiment, a central axis P of the roll member 3 extends in the vertical direction. In this embodiment, an upper side of the roll member 3 is rotatably connected to a base (not shown) of the manufacturing apparatus 1. A lower side of the roll member 3 is connected to the turntable 2.

[0028] The roll member 3 has a cylindrical portion 31 and a protruding portion 32. As shown in Fig. 3, an iron core piece forming portion 71 is wound around the outer peripheral surface 3a of the roll member 3.

[0029] The cylindrical portion 31 has a cylindrical shape extending along the central axis P. In this embodiment, the outer diameter of the cylindrical portion 31 is equal to the inner diameter of the laminated core 80.

[0030] 5, the axial length of the tubular portion 31 is L3. The axial length L3 of the tubular portion 31 is longer than the axial length L81 of the laminated core 80. Therefore, the axial length L3 of the roll member 3 is longer than the axial length L81 of the laminated core 80.

[0031] The protrusion 32 protrudes outward from the outer circumferential surface of the cylindrical portion 31. The protrusion 32 extends in the axial direction of the cylindrical portion 31.

[0032] The protrusions 32 have a shape that allows them to be inserted into the slots 84 in the laminated core 80. As shown in FIGS. 3 and 4, the protrusions 32 are inserted between multiple tooth portions 83 in the core piece forming portions 71 that are wound around the outer circumferential surface of the roll member 3. In the manufacturing apparatus 1 shown in FIGS. 3 and 4, the roll member 3 has six protrusions 32. Note that the roll member may have five or fewer protrusions, or seven or more protrusions. The roll member may also have no protrusions.

[0033] The roll member 3 is rotated about a central axis P by a drive unit 6. When the roll member 3 rotates, the turntable 2 rotates about the central axis P.

[0034] The plurality of pillar members 4 are located radially outward of the roll member 3. Each of the plurality of pillar members 4 extends in the axial direction along the central axis P. That is, in this embodiment, the plurality of pillar members extend in the vertical direction.

[0035] 5, in this embodiment, the axial length of the columnar member 4 is L4. The axial length L4 of the columnar member 4 is longer than the axial length L81 of the laminated core 80.

[0036] 3, 4, and 6, the plurality of pillar-shaped members 4 are arranged in a circumferential direction around the central axis P at radially outer positions of the roll member 3. In this embodiment, the lower side of the roll member 3 is connected to the turntable 2.

[0037] As described above, the turntable 2 rotates about the central axis P as a result of the rotation of the roll member 3. Therefore, the plurality of columnar members 4 connected to the turntable 2 also rotate about the central axis P.

[0038] As shown in FIG. 6 , in this embodiment, the radially outermost portion 4a of the columnar member 4 is located at a distance L1 in the radial direction from the outer peripheral surface 3a of the roll member 3, which is equal to the length L82 of the tooth portions 83. The radially outermost portion 4a of the columnar member 4 refers to the portion of the outer peripheral surface of the columnar member 4 that is farthest from the central axis P when viewed in the axial direction. In other words, the distance L1 between the outer peripheral surface 3a of the roll member 3 and the radially outermost portion 4a of the columnar member 4 is equal to the length L82 of the tooth portions 83. Note that the radially outermost portion of the columnar member may be located at a radially shorter distance from the outer peripheral surface of the roll member than the length L82 of the tooth portions 83. In other words, the columnar member may be located at a position radially inward from the radial position of the columnar member 4 in this embodiment.

[0039] 3 and 4 , the plurality of columnar members 4 are inserted between the plurality of tooth portions 83 when the core piece forming portion 71 is wound onto the outer peripheral surface 3a of the roll member 3. In this embodiment, the manufacturing apparatus 1 has 12 columnar members 4. Therefore, in this embodiment, 12 columnar members 4 are inserted between 12 adjacent tooth portions 83.

[0040] 6, in this embodiment, the 12 columnar members 4 include six pairs of columnar members 4 arranged in the circumferential direction around the central axis P at an angle equal to the angle D83 between circumferentially adjacent tooth portions 83. When the core piece forming portion 71 is wound onto the outer peripheral surface 3a of the roll member 3, the pairs of columnar members 4 are positioned on one side and the other side in the circumferential direction with respect to the six tooth portions 83.

[0041] As shown in Fig. 5, in this embodiment, the columnar member 4 has a lower column portion 41 located on the lower side and an upper column portion 42 connected to the upper side of the lower column portion 41. The lower column portion 41 and the upper column portion 42 are each cylindrical. The diameter of the upper column portion 42 is smaller than the diameter of the lower column portion 41. That is, as shown in Fig. 6, the circumferential length L41 of the lower side of the columnar member 4 is greater than the circumferential length L42 of the upper side of the columnar member 4.

[0042] In this way, the circumferential length L42 of the columnar member 4 on the upper side where the core piece forming portion 71 is supplied to the roll member 3 is smaller than the circumferential length L41 on the lower side. This makes it possible to easily insert the columnar member 4 between the tooth portions 83 when the core piece forming portion 71 is supplied to the roll member 3.

[0043] The guide portion 5 is fixed to a base (not shown) of the manufacturing apparatus 1. As shown in FIGS. 3 and 4 , the guide portion 5 is located radially outward from the upper side of the roll member 3. The guide portion 5 guides the winding of the core piece forming portion 71 around the roll member 3.

[0044] 4, in this embodiment, the guide portion 5 includes two core piece supporting portions 51 and 52. Of the two core piece supporting portions 51 and 52, the core piece supporting portion 51 located on the front side in the rotation direction of the roll member 3 is located axially lower than the core piece supporting portion 52 located on the rear side of the core piece supporting portion 51 in the rotation direction.

[0045] 3 and 4, the core piece forming portion 71 supported by the core piece supporting portions 51, 52 is wound around the roll member 3 with its front side in the rotation direction positioned lower than its rear side in the rotation direction. Therefore, as the roll member 3 rotates, the winding start side of the core piece forming portion 71 wound around the roll member 3 moves downward. As a result, the core piece forming portion 71 is formed in a spiral shape.

[0046] The guide portion may have three or more than three core piece support portions. In this case, the core piece support portions may be positioned axially lower as they move from the rear side to the front side in the rotation direction.

[0047] The drive unit 6 is supported by a base (not shown) of the manufacturing apparatus 1. The drive unit 6 rotates the roll member 3 around the central axis P. The drive unit 6 is, for example, a motor. The drive unit 6 rotates the roll member 3 with the plurality of columnar members 4 inserted between the plurality of tooth portions 83 in the core piece forming portion 71. As described above, the turntable 2 is connected to the lower end of the roll member 3. The lower ends of the plurality of columnar members 4 are connected to the turntable 2. Therefore, when the drive unit 6 rotates the roll member 3 around the central axis P, the turntable 2 and the plurality of columnar members 4 also rotate around the central axis P.

[0048] As shown in FIG. 7 , the multiple columnar members 4 are inserted between the multiple tooth portions 83 of the core piece forming portion 71. By inserting the multiple columnar members 4 between the tooth portions 83, the core piece forming portion 71 cannot move in the circumferential direction relative to the roll member 3. In other words, the multiple columnar members 4 restrict the circumferential movement of the core piece forming portion 71 relative to the roll member 3. Therefore, as shown in FIG. 8 , when the drive unit 6 rotates the roll member 3, the core piece forming portion 71 is wound onto the outer peripheral surface 3 a of the roll member 3.

[0049] As described above, the axial lengths L3, L4 of the cylindrical portion 31 of the roll member 3 and the plurality of columnar members 4 are longer than the axial length L81 of the laminated core 80.

[0050] This allows one core piece forming portion 71 constituting one laminated core 80 to be wound around the outer circumferential surface of the roll member 3 from one longitudinal end to the other end of the core piece forming portion 71. This allows the circumferential positions of the multiple tooth portions 83 that overlap in the stacking direction in the laminated core 80 to be aligned in the stacking direction.

[0051] As described above, the laminated core manufacturing apparatus 1 according to this embodiment is a manufacturing apparatus 1 that manufactures a laminated core 80 by spirally winding a plate-shaped core piece forming portion 71, which has a band-shaped back yoke forming portion 72 and a plurality of teeth portions 83 extending from the back yoke forming portion 72 in one direction in the width direction of the back yoke forming portion 72, while deforming the plate-shaped core piece forming portion 71 in one direction in the width direction. The manufacturing apparatus 1 includes a cylindrical roll member 3 that extends in the axial direction along a central axis P and has the core piece forming portion 71 wound around its outer peripheral surface 3a, a plurality of columnar members 4 that are positioned radially outward of the roll member 3 and lined up in the circumferential direction around the central axis P, and each extend in the axial direction, and a drive unit 6 that rotates the roll member 3 and the plurality of columnar members 4 about the central axis P. The columnar member 4 has its radially outer side 4a, which is farthest from the outer peripheral surface 3a of the roll member 3 in the radial direction, positioned at a distance L1 from the outer peripheral surface 3a of the roll member 3 that is equal to or shorter than the length L82 of the teeth portion 83. The drive unit 6 rotates the roll member 3 and the multiple columnar members 4 about the central axis P with the multiple columnar members 4 inserted between the multiple teeth portions 83.

[0052] In the above-described manufacturing apparatus 1, when the core piece forming portion 71 is wound around the outer peripheral surface 3a of the roll member 3, the columnar members 4 are inserted between the tooth portions 83. This allows the core piece forming portion 71 to be easily formed in a spiral shape. Furthermore, in the above-described manufacturing apparatus 1, the columnar members 4 are positioned radially outward from the outer peripheral surface 3a of the roll member 3. Therefore, the columnar members 4 contact the side surfaces of the tooth portions 83 radially outward from the radially inner end faces of the tooth portions 83. This allows the columnar members 4 to be less likely to slip out from between the tooth portions 83. This also allows the circumferential positions of the tooth portions 83 to be aligned in the lamination direction radially outward from the radially inner end faces. Therefore, the circumferential positions of the tooth portions 83 overlapping in the lamination direction in the laminated core 80 can be efficiently aligned in the lamination direction. Therefore, a manufacturing apparatus 1 capable of efficiently manufacturing the laminated core 80 can be provided.

[0053] In this embodiment, the multiple columnar members 4 include at least one pair of columnar members 4 arranged circumferentially around the central axis P at an angle equivalent to the angle D83 between circumferentially adjacent tooth portions 83 among the multiple tooth portions 83.

[0054] This makes it possible to realize a configuration in which the columnar members 4 are located on both circumferential sides of one tooth portion 83. Therefore, it is possible to more easily prevent the core piece forming portions 71 from moving radially outward of the roll member 3 due to springback occurring in the core piece forming portions 71.

[0055] Furthermore, for example, with a pair of columnar members 4 arranged on both circumferential sides of the tooth portion 83 located at the winding start end 71a of the core piece forming portion 71, the roll member 3 and the multiple columnar members 4 can be rotated around the central axis P. This makes it easier to form the core piece forming portion 71 in a spiral shape.

[0056] Furthermore, the winding end of the core piece forming portion 71 may be positioned so that the teeth portion 83 located at the winding end is disposed between the pair of columnar members 4. This makes it possible to prevent the winding end from moving radially outwardly of the roll member 3 due to the springback.

[0057] In this embodiment, the manufacturing apparatus 1 has a guide unit 5 that is located radially outward from the upper side of the roll member 3 and guides the winding of the core piece forming unit 71 around the roll member 3. The front side of the guide unit 5 in the rotation direction of the roll member 3 is located below the roll member 3 relative to the rear side in the rotation direction. The circumferential length L42 of the multiple columnar members 4 on the upper side in the axial direction is smaller than the circumferential length L41 on the lower side.

[0058] The guide section 5 makes it possible to supply core piece forming sections 71 that are angled with respect to a direction perpendicular to the axial direction of the roll member 3 onto the outer peripheral surface 3a of the roll member 3. As a result, by rotating the roll member 3, it is possible to easily form core pieces 81 that extend downward in a spiral shape on the outer peripheral surface 3a of the roll member 3.

[0059] The circumferential length L42 of the plurality of columnar members 4 on the upper side where the core piece forming portion 71 is supplied to the roll member 3 is smaller than the circumferential length L41 on the lower side. This makes it possible to easily position the plurality of columnar members 4 between the plurality of tooth portions 83 when the core piece forming portion 71 is supplied to the roll member 3.

[0060] Furthermore, the winding start end 71a of the core piece forming portion 71 wound around the outer peripheral surface 3a of the roll member 3 moves downward as the roll member 3 rotates. The circumferential length L41 of the columnar member 4 at the lower side is greater than the circumferential length L42 at the upper side. This makes it difficult for the winding start end 71a side of the core piece forming portion 71 to move circumferentially relative to the roll member 3. This makes it possible to realize a configuration in which the circumferential positions of the teeth portions 83 can be efficiently aligned.

[0061] (Laminated Core Manufacturing Method) Next, with reference to FIGS. 3 and 7 to 10, an exemplary method for manufacturing the laminated core 80 using the manufacturing apparatus 1 having the above-described configuration will be described.

[0062] The manufacturing method of the laminated core 80 includes a punching step and a winding step.

[0063] In the punching step, a steel plate 70, which is a magnetic material, is punched to form a strip-shaped core piece forming portion 71. The core piece forming portion 71 becomes the core pieces 81 in the laminated core 80.

[0064] FIG. 9 is a diagram of punching out steel plate 70. In FIG. 9, region R where steel plate 70 is punched out is indicated by diagonal lines. In the punching process, region R of steel plate 70 is punched out to form plate-shaped core piece forming portion 71 having a strip-shaped back yoke forming portion 72 and a plurality of teeth 83 extending from back yoke forming portion 72 to one side in the width direction of back yoke forming portion 72. The punching process is performed by press working. A description of the press working will be omitted.

[0065] In the winding step, the core piece forming portion 71 is wound onto the outer circumferential surface of the roll member 3 .

[0066] Specifically, in the winding process, as shown in Figure 7, a columnar member 4 is inserted between adjacent circumferentially adjacent tooth portions 83 of the core piece forming portion 71, and the roll member 3, the multiple columnar members 4, and the turntable 2 are rotated.

[0067] The multiple columnar members 4 restrict circumferential movement of the core piece forming portions 71 relative to the roll member 3. Therefore, as shown in Fig. 8, when the roll member 3 rotates, the core piece forming portions 71 are wound around the outer peripheral surface 3a of the roll member 3. That is, as shown in Fig. 3, the core piece forming portions 71 are wound in a spiral shape around the outer peripheral surface 3a of the roll member 3. Thus, a spiral core piece 81 is formed.

[0068] Next, the core piece forming portion 71 is cut or the like at a position that will become the winding end of the core piece 81. As a result, the core pieces 81 move downward under their own weight and are stacked, as shown in Fig. 10. Thereafter, the core pieces 81 are moved to the next process, where predetermined processing is performed on the core pieces 81. In this way, the laminated core 80 is manufactured.

[0069] (Embodiment 2) Next, a manufacturing apparatus 101 for manufacturing a laminated core 80 according to a second exemplary embodiment of the present invention will be described with reference to Figures 11 to 13. This embodiment differs from the manufacturing apparatus 1 of the first embodiment in that the roll members 103 can be removed from the turntable 102. Below, a description of the same configuration as in the first embodiment will be omitted, and only the configuration that differs from the first embodiment will be described.

[0070] 11, the manufacturing apparatus 101 includes a turntable 102, a roll member 103, a plurality of columnar members 104, a guide unit, and a drive unit. The configurations of the guide unit and the drive unit are similar to those of the guide unit 5 and the drive unit 6 in the first embodiment, and therefore, description and illustration thereof will be omitted.

[0071] In this embodiment, the rotating table 102 supports the roll member 103 so that the roll member 103 can be attached to or detached from the rotating table 102. The rotating table 102 supports a plurality of pillar members 104. The rotating table 102 rotates together with the roll member 103 and the plurality of pillar members 104 around the central axis P of the roll member 103.

[0072] In this embodiment, the central axis P of the roll member 103 extends in the vertical direction. In this embodiment, the lower side of the roll member 103 is detachably connected to the rotating table 102. The other configurations of the roll member 103 are the same as those of the roll member 3 in the first embodiment, and therefore, description thereof will be omitted.

[0073] In this embodiment, the plurality of pillars 104 each extend in the vertical direction. In this embodiment, the lower sides of the plurality of pillars 104 are fixed to the rotating table 102. Other configurations of the plurality of pillars 104 are similar to those of the plurality of pillars 4 in embodiment 1, and therefore description thereof will be omitted.

[0074] That is, the manufacturing apparatus 101 according to this embodiment has a turntable 102 that rotates around a central axis P together with a roll member 103 and a plurality of columnar members 104. In this embodiment, the central axis P extends in the vertical direction. The lower end of the roll member 103 is detachably connected to the turntable 102. The lower ends of the plurality of columnar members 104 are fixed to the turntable 102.

[0075] Therefore, in the manufacturing apparatus 101, as shown in FIG. 12, the roll member 103 can be removed from the turntable 102 while the plurality of columnar members 104 is fixed to the turntable 102. This makes it possible to realize a configuration in which the roll member 103 can be removed from the core piece 81 in a state in which the spiral shape is maintained by the plurality of columnar members 104, as shown in FIG. 13. Therefore, for example, the core piece 81 in which the spiral shape is maintained can be easily moved to the next process. Therefore, it is possible to provide a manufacturing apparatus that can efficiently manufacture the laminated core 80.

[0076] (Laminated Core Manufacturing Method) Next, an exemplary method for manufacturing the laminated core 80 using the manufacturing apparatus 101 having the above-described configuration will be described.

[0077] The manufacturing method of the laminated core 80 includes a punching step, a winding step, and a roll member removing step. The punching step and the winding step are the same as the winding step in the first embodiment, and therefore a description thereof will be omitted.

[0078] The roll member detaching step is a step of removing roll member 103 from turntable 102. Specifically, as shown in Fig. 14 , in the roll member detaching step, turntable 102 is moved downward relative to roll member 103 while the lower ends of multiple columnar members 104 are fixed. This allows roll member 103 to be detached from spiral core piece 81 in the axial direction.

[0079] That is, the manufacturing method of the laminated core 80 according to this embodiment is a manufacturing method for manufacturing the laminated core 80 using the manufacturing apparatus 101. The manufacturing method of the laminated core 80 according to this embodiment includes a winding step and a roll member detaching step. In the winding step, columnar members 104 are inserted between circumferentially adjacent tooth portions 83 of the plurality of teeth 83 in the core piece forming portion 71, and the roll member 103, the plurality of columnar members 104, and the turntable 102 are rotated to deform the core piece forming portion 71 in one direction in the width direction and wind the columnar members 104 spirally around the outer peripheral surface of the roll member 103, thereby forming a spiral core piece 81. In the roll member detaching step, the turntable 102 is moved downward relative to the roll member 103 with the lower ends of the plurality of columnar members 104 fixed, thereby detaching the roll member 103 from the spiral core piece 81 in the axial direction.

[0080] This allows the core piece forming portion 71 to be easily formed into a spiral shape, and the core pieces 81 that maintain their spiral shape can be easily moved. In other words, the core pieces 81 that maintain their spiral shape can be moved to the next process. Therefore, a manufacturing method that can efficiently manufacture the laminated core 80 can be provided.

[0081] (Other embodiments) Although the embodiments of the present invention have been described above, the above-described embodiments are merely examples for carrying out the present invention. Therefore, the present invention is not limited to the above-described embodiments, and it is possible to appropriately modify the above-described embodiments within the scope of the spirit of the present invention.

[0082] In each of the above-described embodiments, the central axis P of the roll member 3, 103 is in the vertical direction. The multiple pillar members 4, 104 extend in the vertical direction. However, the central axis of the roll member may be horizontal, or may be inclined relative to the vertical or horizontal direction. The multiple pillar members only need to extend in the axial direction of the roll member.

[0083] In the first embodiment, the manufacturing apparatus 1 has 12 columnar members 4. However, the manufacturing apparatus may have columnar members in a number equal to or less than the number of teeth of the laminated core. It is preferable that the manufacturing apparatus has a plurality of columnar members.

[0084] In the first embodiment, the columnar member 4 has a cylindrical lower column portion 41 and a cylindrical upper column portion 42 whose diameter is smaller than that of the lower column portion 41. However, the columnar member may have multiple columnar members each having the same diameter. Alternatively, the columnar member may have a single columnar member.

[0085] In the first embodiment, the lower pillar portion 41 and the upper pillar portion 42 are each cylindrical. However, the lower pillar portion may be, for example, a prismatic pillar. The upper pillar portion may be, for example, a prismatic pillar.

[0086] In the first embodiment, the columnar member 4 has a cylindrical lower column portion 41 and a cylindrical upper column portion 42 whose diameter is smaller than that of the lower column portion 41. However, the columnar member may have another configuration as long as the circumferential length of the lower side is greater than the circumferential length of the upper side. For example, the columnar member may be conical in shape with a diameter that decreases toward the top.

[0087] In the first embodiment, the manufacturing apparatus 1 has a pair of columnar members 4 aligned in the circumferential direction at an angle equal to angle D83. However, the manufacturing apparatus does not have to have a pair of columnar members aligned in the circumferential direction at the angle. That is, the angle between circumferentially adjacent columnar members among the multiple columnar members may be larger than angle D83.

[0088] In the first embodiment, the manufacturing apparatus 1 has six pairs of columnar members 4 aligned in the circumferential direction at an angle equal to angle D83. However, the manufacturing apparatus may have at least one pair of columnar members aligned in the circumferential direction. It is preferable that the manufacturing apparatus has two pairs of columnar members aligned in the circumferential direction. In this case, one of the two pairs of columnar members can be arranged on both sides of the teeth located at the winding start end of the core piece forming portion. The other of the two pairs of columnar members can be arranged on both sides of the teeth located at the winding end end of the core piece forming portion.

[0089] In the first embodiment, the manufacturing apparatus 1 has a guide portion 5. However, the manufacturing apparatus does not necessarily have to have a guide portion.

[0090] In the first embodiment, the guide portion 5 is located radially outward from the upper side of the roll member 3. That is, the core piece forming portion 71 is supplied to the upper side of the roll member 3 and formed spirally downward. However, the guide portion may also be located radially outward from the lower side of the roll member. That is, the core piece forming portion may be supplied to the lower side of the roll member and formed spirally upward.

[0091] In the roll member detaching step of the second embodiment, the turntable 102 to which the lower ends of the plurality of pillar members 104 are fixed is moved downward relative to the roll member 103. However, in the roll member detaching step, the roll member may be moved upward relative to the turntable to which the lower ends of the plurality of pillar members are fixed. In the roll member detaching step, the turntable to which the lower ends of the plurality of pillar members are fixed may be moved upward relative to the roll member. In the roll member detaching step, the roll member may be moved downward relative to the turntable to which the lower ends of the plurality of pillar members are fixed.

[0092] (Configuration example) The present technology can also be configured as follows.

[0093] (1) A manufacturing apparatus for a laminated core spirally winds a plate-shaped core piece forming portion having a band-shaped back yoke forming portion and a plurality of teeth extending from the back yoke forming portion in one width direction while deforming the plate-shaped core piece forming portion in one width direction. The manufacturing apparatus includes a cylindrical roll member extending axially along a central axis and having the core piece forming portion wound around its outer circumferential surface, a plurality of columnar members positioned radially outward of the roll member in a line in the circumferential direction around the central axis and each extending in the axial direction, and a drive unit that rotates the roll member and the plurality of columnar members around the central axis. The radially outermost portion of the columnar members, which is farthest from the outer circumferential surface of the roll member in the radial direction, is positioned at a distance from the outer circumferential surface of the roll member that is equal to or shorter than the length of the teeth. The driving portion rotates the roll member and the plurality of columnar members about the central axis with the plurality of columnar members inserted between the plurality of teeth.

[0094] (2) In the laminated core manufacturing device described in (1), the axial length of the roll members and the plurality of columnar members is longer than the axial length of the laminated core.

[0095] (3) In the manufacturing apparatus for laminated iron cores described in (1) or (2), the plurality of columnar members include at least one pair of columnar members arranged circumferentially around the central axis at an angle equal to the angle between adjacent circumferentially adjacent tooth portions among the plurality of tooth portions.

[0096] (4) The laminated core manufacturing apparatus according to any one of (1) to (3) further includes a guide portion located radially outward from one axial side of the roll member and guiding the winding of the core piece forming portion around the roll member. The guide portion is located on the other axial side of the roll member with its front side in the rotation direction of the roll member positioned relative to its rear side in the rotation direction. The circumferential length of the plurality of columnar members on one axial side is smaller than the circumferential length on the other axial side.

[0097] (5) The laminated core manufacturing apparatus according to any one of (1) to (4) further includes a turntable that rotates around the central axis together with the roll members and the plurality of columnar members. The central axis extends in the vertical direction. The lower ends of the roll members are detachably connected to the turntable. The lower ends of the plurality of columnar members are fixed to the turntable.

[0098] (6) A manufacturing method of a laminated core is a manufacturing method of a laminated core using the manufacturing apparatus of a laminated core described in (5). The manufacturing method of a laminated core includes a winding step of inserting the columnar members between circumferentially adjacent tooth portions of the plurality of teeth portions in the core piece forming portion, and rotating the roll member, the plurality of columnar members, and the turntable to deform the core piece forming portion in one direction in the width direction and wind it spirally around the outer peripheral surface of the roll member to form spiral core pieces, and a roll member detaching step of axially detaching the roll member from the spiral core pieces by moving the turntable downward relative to the roll member with the lower ends of the plurality of columnar members fixed. [Industrial Applicability]

[0099] The present invention is applicable to a manufacturing device for a laminated core in which a strip-shaped core piece forming portion is wound spirally. [Explanation of symbols]

[0100] 1, 101 Manufacturing equipment 2. 102 turntable 3, 103 Roll member 3a Outer surface 4, 104 Columnar members 4a Radial outer side 5 Guide section 6 Drive unit 31 Cylinder part 32 Protrusion 41 Lower column 42 Upper pillar part 51, 52 Core piece support part 70 steel plate 71 Core piece forming section 71a Winding start end 72 Back yoke forming part 80 Laminated core 81 Core piece 82 Back yoke 83 Teeth 84 slots P Central axis of roll member Q Central axis of laminated core L1: The distance between the outer peripheral surface of the roll member and the outermost radial surface of the columnar member L3 Axial length of the roll member L4 Axial length of columnar member L41 Circumferential length of the lower side of the columnar member L42 Circumferential length of the upper side of the columnar member L81 Axial length of laminated core L82 Teeth length D83 Angle between adjacent teeth in the circumferential direction

Claims

1. A manufacturing device for manufacturing a laminated core by spirally winding a plate-shaped core piece forming portion, the plate-shaped core piece forming portion having a band-shaped back yoke forming portion and a plurality of teeth extending from the back yoke forming portion in one width direction of the back yoke forming portion while deforming the plate-shaped core piece forming portion in one width direction, a cylindrical roll member extending in the axial direction along a central axis and having the core piece forming portion wound around its outer circumferential surface; a plurality of columnar members positioned radially outward of the roll member, aligned in a circumferential direction around the central axis, and each extending in the axial direction; a drive unit that rotates the roll member and the plurality of columnar members around the central axis; and The columnar member is a radially outer side farthest from the outer peripheral surface of the roll member in the radial direction is positioned at a distance from the outer peripheral surface of the roll member that is equal to or shorter than a length of the tooth portion in the radial direction, The drive unit is rotating the roll member and the plurality of columnar members about the central axis in a state in which the plurality of columnar members are inserted between the plurality of tooth portions; Laminated core manufacturing equipment.

2. 2. The laminated core manufacturing apparatus according to claim 1, The lengths of the roll member and the plurality of columnar members in the axial direction are: longer than the axial length of the laminated core, Laminated core manufacturing equipment.

3. 2. The laminated core manufacturing apparatus according to claim 1, The plurality of columnar members are At least one pair of columnar members is arranged in a circumferential direction around the central axis at an angle equal to that of adjacent teeth among the plurality of teeth in the circumferential direction, Laminated core manufacturing equipment.

4. 2. The laminated core manufacturing apparatus according to claim 1, a guide portion positioned radially outward from one axial side of the roll member and configured to guide the winding of the core piece forming portion onto the roll member, The guide portion is a front side of the roll member in a rotation direction is located on the other side of the roll member in the axial direction relative to a rear side of the roll member in the rotation direction, The plurality of columnar members are The circumferential length on one side in the axial direction is smaller than the circumferential length on the other side in the axial direction. Laminated core manufacturing equipment.

5. 5. The laminated core manufacturing apparatus according to claim 1, a rotating table that rotates around the central axis together with the roll member and the plurality of columnar members, The central axis extends in the vertical direction, The lower end of the roll member is Removably connected to the turntable, The lower ends of the plurality of columnar members are fixed to the turntable, Laminated core manufacturing equipment.

6. A manufacturing method for manufacturing a laminated core using the manufacturing apparatus for a laminated core according to claim 5, comprising: a winding process in which the columnar members are inserted between circumferentially adjacent tooth portions of the plurality of tooth portions in the core piece forming portion, and the roll member, the plurality of columnar members, and the turntable are rotated in a state where the core piece forming portion is deformed in one direction in the width direction and wound spirally around the outer peripheral surface of the roll member to form spiral core pieces; a roll member detachment step of detaching the roll member from the spiral core piece in the axial direction by moving the rotating table downward relative to the roll member while the lower ends of the plurality of columnar members are fixed; having Manufacturing method of laminated core.

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