JP2016077046A - Manufacturing method of laminated core, and laminate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a laminated core with which the amount of core sheets 4 to be scrapped is not increased while temporarily holding laminated stator core pieces 1 by a temporary engaging jig formed from a temporary engaging jig piece 3 which is cut out of the core sheet 4, and a laminate which is manufactured as an intermediate product in the manufacturing method.SOLUTION: The manufacturing method includes: a punching step for punching out the core sheet 4 into a stator core piece 1 having an annular outline and the temporary engaging jig piece 3 disposed at an inner diameter side of the stator core piece 1 and having a shape engaged with the stator core piece 1 while keeping the state where the stator core piece 1 and the temporary engaging jig piece 3 are engaged; a lamination step for laminating a plurality of stator core pieces 1 and temporary engaging jig pieces 3 which are engaged with each other; and a temporary engagement step for engaging the laminated temporary engaging jig pieces 3 with each other to form the temporary engaging jig.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for producing a laminated core obtained by laminating a plurality of iron core pieces, and a laminate produced as an intermediate product in the production method.

  The rotor and stator of the electric motor are collectively referred to as an armature. The armature is formed by winding a core or mounting a permanent magnet on the core. An armature core constructed by laminating thin plates such as electromagnetic steel plates is called a laminated core. Further, in this specification, a small piece such as an electromagnetic steel plate constituting a laminated iron core is referred to as an iron core piece, and a thin plate of an electromagnetic steel plate that is a material of the iron core piece is referred to as a core sheet.

  A so-called inner rotor type electric motor includes a stator having a substantially annular cross section and a rotor arranged concentrically on the inner diameter side of the stator, and a gap called an air gap is provided between the stator and the rotor. Is provided.

  Cutting out the stator core piece and the rotor core piece is performed by punching the core sheet with a mold. In this case, the stator core piece and the rotor core piece are arranged concentrically on the core sheet, that is, arranged in the same pattern as the cross-sectional view of the motor (for example, Patent Document 1). If arranged in this way, the scrap amount can be reduced. This is because when the stator core piece and the rotor core piece are punched separately, the portion disposed on the inner diameter side of the stator core piece and discarded as scrap is used as the rotor core piece. However, even in this case, the core sheet at the position corresponding to the air gap is discarded as scrap.

  The laminated core is completed by stacking core pieces punched from the core sheet and fixing the core pieces to each other. As a fixing method therefor, a method by resin filling as disclosed in Patent Document 2 is known. That is, a through hole is formed at the same position of each laminated iron core piece to form a through hole that penetrates the laminated iron core, and the through hole is filled with a liquid insulating resin, solidified, and It is known to fix the pieces together.

  Since the punching / stacking of the core pieces and the resin filling process are performed in different apparatuses or processes, the core pieces are transported between the apparatuses or between the processes. In the course of this conveyance, if the lamination state of the iron core pieces is disturbed, that is, if the position of the iron core pieces deviates from the normal position or the lamination collapses, work to return it, so-called reversing work occurs, Production efficiency decreases. Therefore, it is necessary to temporarily hold the laminated iron core pieces to prevent the disordered lamination state.

  As a method for that purpose, Patent Document 3 discloses the following method. That is, it is disclosed that an iron core piece and a butterfly-shaped fitting portion that fits the iron core piece are punched out from the core sheet and stacked, and the stacked fitting portions are fixed to each other by caulking. Since the fitting parts fixed to each other by caulking work as a kind of temporary fixing jig, the laminated core pieces can be held. Further, the fitting portion is separated from the laminated body of the iron core pieces after the iron core pieces are fixed with an adhesive or the like, and then discarded.

JP 2011-139605 A Special table 2003-529309 gazette Japanese Patent No. 5357187

  According to Patent Document 3, the fitting portion is formed in the scrap portion of the core sheet, but the fitting portion is formed on the outer diameter side of the iron core piece (outside the back yoke portion), so the fitting portion is formed. Therefore, there is a problem that a new scrap portion is generated. That is, in order to ensure the site | part used as a fitting part on a core sheet, it is necessary to enlarge the dimension of a core sheet, As a result, there exists a problem that the amount of scraps increases.

  The present invention has been made in view of such circumstances, and a temporary fixing jig piece cut out from a core sheet is used to form a temporary fixing jig, and a laminated body of iron core pieces is formed using the temporary fixing jig. It aims at providing the manufacturing method of a laminated iron core which does not increase the scrap amount of a core sheet, hold | maintaining temporarily. Moreover, it aims at providing the laminated body manufactured as an intermediate product in this manufacturing method.

  In order to solve the above problems, a method of manufacturing a laminated core according to a first aspect of the present invention includes an outer ring piece having an annular outer shape, an inner ring side of the outer ring piece, and an engagement with the outer ring piece. A punching step of punching a temporary fixing jig piece having a shape to be joined from the core sheet while the outer ring piece and the temporary fixing jig piece are engaged, and the outer ring piece and the temporary fixing engaged with each other. A stacking step of stacking a plurality of jig pieces, and a temporary fixing step of fixing the stacked temporary fixing jig pieces to form a temporary fixing jig.

  After the temporary fixing step, there may be provided a main fixing step of forming the outer ring core by fixing the laminated outer ring pieces to each other, and a separation step of separating the outer ring core and the temporary fixing jig. good.

  In the punching step, an inner ring piece having a shape that engages with the temporary fixing jig piece is disposed on an inner diameter side of the temporary fixing jig piece, and the outer ring piece, the inner ring piece, and the temporary fixing jig are arranged. The pieces are punched from the core sheet while being engaged with each other, and the outer ring piece, the inner ring piece, and the temporary fixing jig piece that are engaged with each other are stacked in the stacking step. good.

  After the temporary fixing step, the outer ring piece and the inner ring piece that are stacked are fixed to each other to form an outer ring core and an inner ring core, and the outer ring core, the inner ring core, and the temporary stop. A separation step of separating the jigs from each other.

  The manufacturing method of the laminated core according to the second aspect of the present invention includes an outer ring piece having an annular outer shape, a temporary fixing jig piece arranged on an inner diameter side of the outer ring piece, and an inner diameter of the temporary fixing jig piece. The inner ring piece and the temporary fixing jig piece are punched out in a state of being engaged with each other from the core sheet on which the inner ring piece is arranged on the side and has a shape that engages with the temporary fixing jig piece. A stamping step, a stacking step of stacking a plurality of the inner ring pieces and the temporary fixing jig pieces engaged with each other, and fixing the stacked temporary fixing jig pieces to each other to form a temporary fixing jig A temporary fixing step.

  After the temporary fixing step, there may be provided a main fixing step of fixing the laminated inner ring pieces to each other to form an inner ring core, and a separation step of separating the inner ring core and the temporary fixing jig. good.

  The temporary fixing jig piece may be fixed in the temporary fixing step by caulking.

  The outer ring piece or the inner ring piece in the main fixing step may be fixed by resin filling.

  In the punching step, the temporary fixing jig piece punched from the core sheet protrudes from the annular portion and the annular portion, and fits into a gap between the teeth formed on the outer ring piece. May be provided.

  At least one portion of the annular portion of the temporary fixing jig piece may be cut off.

  A laminate according to a third aspect of the present invention includes an outer ring piece having an annular outer shape, and a plurality of temporary fixing jig pieces that are disposed on an inner diameter side of the outer ring piece and engage with the outer ring piece. In the laminated body, the laminated temporary fixing jig pieces are fixed to each other to form a temporary fixing jig.

  The laminated body may be disposed on an inner diameter side of the temporary fixing jig piece, and an inner ring piece that engages with the temporary fixing jig piece may be laminated together with the outer ring piece and the temporary fixing jig piece.

  According to the present invention, the temporary fixing jig piece is punched out from the previously scraped portion of the core sheet to constitute the temporary fixing jig, so that the temporary fixing jig can be manufactured without increasing the amount of scrap. Can do. Moreover, since the shift | offset | difference of the laminated | stacked iron core piece can be prevented by using a temporary fixing jig | tool, a back-return operation | work reduces and the productivity of a laminated iron core improves.

It is a top view which shows the planar shape of the iron core piece which concerns on embodiment of this invention. It is a conceptual side view which shows the manufacture process of the iron core piece which concerns on embodiment of this invention. It is a conceptual top view which shows the change of the planar shape of the core sheet in the manufacture process of the iron core piece which concerns on embodiment of this invention. It is explanatory drawing which shows the assembly process of the laminated iron core which concerns on embodiment of this invention. It is explanatory drawing which shows the method of releasing engagement with a stator iron core and a temporary fixing jig. It is explanatory drawing which shows the effect | action of a temporary fixing jig. It is a top view which shows the modification of a temporary fixing jig piece. It is a top view which shows another modification of a temporary fixing jig piece.

  Hereinafter, the manufacturing method and laminated body of the laminated iron core which concern on embodiment of this invention are demonstrated in detail, referring drawings.

  FIG. 1 is a plan view showing the shape of the stator core piece 1, the rotor core piece 2, and the temporary fixing jig piece 3 and the layout of the core sheet 4. That is, the stator core piece 1 and the like have a planar shape as shown in FIG. 1 and are punched from the core sheet 4 while maintaining the layout as shown in FIG. The stator core piece 1 is an example of an outer ring piece of the present invention, and the rotor core piece 2 is an example of an inner ring piece.

  The stator core piece 1 is an iron core piece constituting a stator core of a so-called inner rotor type electric motor. That is, the stator core is configured by stacking a large number of stator core pieces 1 and fixing them together. The stator core piece 1 is a material of a so-called split-type stator core, and 12 segments 5 are engaged with each other to form an annular shape as a whole. The segment 5 includes a back yoke 5a that forms the outer diameter portion of the stator core piece 1, and a tooth 5b is disposed at the center of the back yoke 5a. The teeth 5b protrude toward the inner diameter side of the stator core piece 1, and have a flange portion 5c at the tip, and are formed in a T shape as a whole. A gap 5d is formed between the teeth 5b of the adjacent segments 5, and a through hole 5e is formed in the back yoke 5a. The through holes 5e are filled with insulating resin after the segments 5 (stator core pieces 1) are stacked. As the insulating resin, a thermosetting resin or a thermoplastic resin is used. The same applies to the lamination of rotor core pieces described later.

  The rotor core piece 2 is an iron core piece constituting the rotor core of the inner rotor type electric motor. That is, the rotor core is configured by stacking a large number of rotor core pieces 2 and fixing them together. The rotor core piece 2 has a through hole 2a filled with an insulating resin after the rotor core pieces 2 are stacked. In this figure, only the shape necessary for the description of the embodiment is drawn for the rotor core piece 2. A shape unnecessary for the description, for example, a hole through which the rotating shaft passes, a hole for inserting a permanent magnet, and the like are not shown.

  The temporary fixing jig piece 3 is a member disposed between the stator core piece 1 and the rotor core piece 2, and as shown below, the stator core piece 1 and the rotor core piece 2 respectively. It has a shape to engage.

  The temporary fixing jig piece 3 includes an annular portion 3a and a plurality of fitting portions 3b protruding from the annular portion 3a. The fitting portion 3b has a shape and a size that are sandwiched between the flange portions 5c of a pair of segments 5 adjacent to each other. That is, the temporary fixing jig piece 3 is engaged with the stator core piece 1 by providing the fitting portion 3b. A recess 3c is formed at the tip of the fitting portion 3b. In addition, a watermark hole 3d is formed in a portion of the annular portion 3a corresponding to the base of the fitting portion 3b. The operation of the recess 3c and the watermark hole 3d will be described later. Reference numeral 3e indicates a position where crimping is performed.

  The contour on the inner diameter side of the temporary fixing jig piece 3 follows the contour on the outer diameter side of the rotor core piece 2. That is, both have the same shape. Therefore, the temporary fixing jig piece 3 and the rotor core piece 2 are engaged with each other.

  Next, with reference to FIG. 2, 3, the manufacturing method of an iron core piece is demonstrated. FIG. 2 is a conceptual side view showing a manufacturing process of the core piece, and FIG. 3 is a conceptual plan view showing a change in the shape of the core sheet 4 in the manufacturing process of the core piece. 2 and 3, (a) to (d) show stages in the manufacturing process, and the core sheet 4 is conveyed in the right direction and moves in stages (a) to (d) in order.

  First, as shown in FIGS. 2A and 3A, the core sheet 4 is sandwiched between the upper mold 6a and the lower mold 7a, and the rotor core piece 2 is punched out and then pushed back. Next, as shown in FIGS. 2B and 3B, the core sheet 4 is sandwiched between the upper mold 6b and the lower mold 7b, the temporary fixing jig piece 3 is punched out, and then pushed back. The Further, as shown in FIGS. 2 (c) and 3 (c), the core sheet 4 is sandwiched between the upper die 6c and the lower die 7c, and the stator core piece 1 is punched out and then pushed back. 2 (d) and 3 (d), the stator core piece 1, the rotor core piece 2 and the temporary fixing jig piece 3 are attached to the upper die 6d while maintaining the engaged state. It is pushed and removed from the core sheet 4. The stator core pieces 1 and the like that have been removed are laminated by a laminated mold 8 to form a laminated body 9. Since the upper die 6d is formed with a caulking die at a position corresponding to the caulking position 3e shown in FIG. 1, the temporary fixing jig piece 3 is directly underneath (that is, the layer is laminated first). And the crimping jig piece 3 is crimped. As a result, the stacked temporary fixing jig pieces 3 are fixed to each other to form the temporary fixing jig 10.

  2 and 3 are conceptual diagrams, and the shapes of the stator core piece 1 and the like are simplified. Also, the process is simplified and described. For example, in the actual stage (a), a plurality of sets of upper molds and lower molds are arranged in order to punch out the complicated shape of the rotor core piece 2, but in FIG. These are represented by the mold 7a. The same applies to the stage (b) and subsequent stages.

  When the prescribed number of stator core pieces 1 and the like are laminated by the laminated mold 8, that is, when the laminated body 9 is completed, the laminated body 9 is conveyed to a resin filling device (not shown). At this time, since the stator core piece 1 and the rotor core piece 2 are respectively engaged with the temporary fixing jig piece 3, the laminated stator core piece 1 and the rotor core piece 2 are temporarily fixed. It is held by the tool 10. Therefore, the laminated state of the laminated stator core piece 1 and the rotor core piece 2 is maintained in a normal state. That is, no displacement or collapse occurs.

  The resin filling device injects and fills the liquid insulating resin into the through hole 5e (see FIG. 1) of the segment 5 (stator core piece 1) and the through hole 2a (see FIG. 1) of the rotor core piece 2. . The injected and filled insulating resin is then solidified to form a solidified body 11 penetrating through the laminate 9 as shown in FIG. As a result, the laminated stator core piece 1 and the rotor core piece 2 are fixed to each other to form the stator core 12 and the rotor core 13. However, these are still in a state of being engaged with the temporary fixing jig 10. Therefore, as shown in FIG. 4B, the rotor core 13 is extracted from the laminate 9, and the rotor core 13 is separated from other portions. Then, as shown in FIG. 4C, the stator core 12 and the temporary fixing jig 10 are separated. Through the above process, the stator core 12 and the rotor core 13 are completed. After that, the temporary fixing jig 10 is discarded.

  In the above description, an example in which the temporary fixing jig 10 is extracted by sliding in the vertical direction with respect to the stator core 12 is shown. In this case, the temporary fixing jig 10 maintains the original shape even after separation. However, since the temporary fixing jig 10 is discarded after separation, the temporary fixing jig 10 may be deformed to release the engagement between the temporary fixing jig 10 and the stator core 12. For example, as shown in FIG. 5, if the tool 14 is inserted into the gap 5d from which the fitting portion 3b protrudes, the fitting portion 3b is pressed and pushed out from the gap 5d, the temporary fixing jig 10 and the stator core The engagement of 12 is released.

  At this time, as shown in FIG. 6, the recess 3 c formed at the tip of the fitting portion 3 b functions as a seating surface for receiving the tool 14. By receiving the tool 14 in the recess 3c, the tool 14 can be stabilized with respect to the fitting portion 3b. Moreover, since the open hole 3d is crushed by the pressing force of the tool 14, the displacement of the fitting portion 3b is facilitated. That is, the fitting portion 3b can be retracted from the gap 5d by crushing the watermark hole 3d.

  Moreover, as shown to Fig.7 (a), the annular part 3a of the temporary fixing jig piece 3 may be cut | disconnected by one place, and you may make it become C shape as a whole. That is, the gap 3f may be formed in the annular portion 3a. By selecting such a shape, the annular portion 3a is easily deformed, so that the temporary fixing jig 10 can be easily detached from the stator core 12. Further, as shown in FIG. 7B, if the gap 3f parallel to the pressing direction of the fitting portion 3b is formed in the annular portion 3a, the temporary fixing jig 10 can be further easily detached from the stator core 12. become.

  Further, as shown in FIG. 8, a fitting portion 3 g may be formed also on the inner diameter side of the temporary fixing jig piece 3 so that the fitting portion 3 g is fitted to the rotor core piece 2.

  As described above, according to the present embodiment, the core sheet 4 located in the portion corresponding to the air gap between the stator core piece 1 and the rotor core piece 2, that is, the core sheet originally located in the portion to be scrapped. Since 4 is used as the temporary fixing jig piece 3, the temporary fixing jig 10 can be formed without increasing the amount of scrap. Further, the temporary fixing jig 10 can hold the laminated stator core piece 1 and the rotor core piece 2 to maintain a normal laminated state.

  In addition, said embodiment illustrates the specific embodiment of this invention, and does not delimit the technical scope of this invention. The present invention can be freely modified, applied or improved within the scope of the technical idea described in the claims.

  For example, in the above embodiment, the stator core piece 1 is illustrated as a specific example of the outer ring piece, and the rotor core piece 2 is illustrated as a specific example of the inner ring piece. However, the application target of the present invention is a so-called inner rotor type electric motor. It is not limited to manufacture of the laminated iron core to be used. The present invention can also be applied to the manufacture of laminated iron cores used in so-called outer rotor type electric motors.

  In the above embodiment, the example in which the temporary fixing jig piece 3 is disposed between the stator core piece 1 and the rotor core piece 2 has been shown. However, when only the stator core piece 1 is punched from the core sheet 4 Alternatively, the present invention can also be applied to the case where only the rotor core piece 2 is punched or the case where the stator core piece 1 is not disposed on the outer diameter side of the rotor core piece 2. That is, for example, in FIG. 1, the present invention can also be applied to the case where the rotor core piece 2 is not disposed on the inner diameter side of the stator core piece 1.

  Further, in the above embodiment, in the step shown in FIG. 2D, a laminated body 9 in which the laminated body of the stator core piece 1 and the rotor core piece 2 is engaged with the temporary fixing jig 10 is manufactured. In this example, the laminated body 9 is conveyed to the resin filling device. However, the laminated body 9 may lack either the stator core piece 1 or the rotor core piece 2. That is, the laminated body 9 may be formed by engaging the laminated body of the stator core pieces 1 with the temporary fixing jig 10, or the laminated body of the rotor core pieces 2 with the temporary fixing jig 10. It may be engaged.

  For example, in the step shown in FIG. 2A, the rotor core piece 2 may be separated from the core sheet 4 without being pushed back, and the rotor core piece 2 may be laminated alone. In this case, in the step shown in FIG. 2D, a laminated body 9 in which the laminated body of the stator core pieces 1 is engaged with the temporary fixing jig 10 is manufactured and conveyed to the resin filling device.

  Alternatively, in the step shown in FIG. 2B, the set of the rotor core piece 2 and the temporary fixing jig piece 3 is separated from the core sheet 4 without being pushed back by the temporary fixing jig piece 3. You may do it. Then, a set of the rotor core piece 2 and the temporary fixing jig piece 3 separated from the core sheet 4 is laminated, and the laminated temporary fixing jig pieces 3 are fixed to each other to form the temporary fixing jig 10. To do. In this case, in the step shown in FIG. 2 (b), a laminated body 9 in which the laminated body of the rotor core pieces 2 is engaged with the temporary fixing jig 10 is manufactured and conveyed to the resin filling device. The stator core piece 1 is separated from the core sheet 4 and laminated in the step shown in FIG.

  Further, the inner ring piece and the outer ring piece of the present invention are based on the concept of “inner and outer” in the layout on the core sheet, and the inner core and the outer core of the electric motor do not necessarily match. For example, when only the rotor core piece 2 of the so-called inner rotor type motor is punched from the core sheet 4, that is, when the stator core piece 1 is not disposed on the outer diameter side of the rotor core piece 2 in FIG. The rotor core piece 2 may correspond to an outer ring piece. In this case, a rotating shaft through hole (not shown in FIG. 1) formed at the center of the rotor core piece 2 corresponds to the inner diameter of the outer ring piece, and the temporary fixing jig piece 3 corresponds to the rotating shaft through hole. Placed in.

  In the above embodiment, the so-called split-type stator core piece 1 consisting of 12 segments 5 has been exemplified as a specific example of the outer ring piece, but the object of application of the present invention is to manufacture a split-type stator core. It is not limited. The present invention also applies to the manufacture of an integral stator core.

  The shapes and numbers of the fitting portions 3b and the fitting portions 3g of the temporary fixing jig piece 3 shown in the above embodiment are merely examples, and the technical scope of the present invention is not limited thereto.

  The shape and number of the gap 3f of the temporary fixing jig piece 3 shown in the above embodiment are also examples, and the technical scope of the present invention is not limited by these.

  In the above embodiment, a specific example in which the stator core piece 1 (outer ring piece) or the rotor core piece 2 (inner ring piece) is punched from the core sheet 4 one by one (also referred to as one piece) is illustrated. The target of is not limited to one sheet. The core sheet 4 may be punched by overlapping two or more sheets. If one piece is removed, the function of holding the core piece will be lost if the temporary fixing jig piece 3 is displaced by one piece in the thickness direction of the iron piece during pushback. Then, even if it shifts by one sheet, the function of holding the iron core piece is maintained.

  Moreover, in the said embodiment, although resin filling was illustrated as a fixing means in this fixing process, this fixing means is not limited to resin filling. For example, the fixing means may be adhesion or welding.

  The shapes of the stator core piece 1 and the rotor core piece 2 shown in the above embodiment are merely examples, and the technical scope of the present invention is not limited by these.

DESCRIPTION OF SYMBOLS 1 Stator core piece 2 Rotor core piece 2a Through-hole 3 Temporary fixing jig piece 3a Ring part 3b Fitting part 3c Depression 3d Opening hole 3e Caulking position 3f Gap 3g Fitting part 4 Core sheet 5 Segment 5a Back yoke 5b Teeth 5c Gutter 5d Gap 5e Through hole 6a to 6d Upper mold 7a to 7c Lower mold 8 Laminated mold 9 Laminated body 10 Temporary fixing jig 11 Solidified body 12 Stator core 13 Rotor core 14 Tool

Claims (13)

An outer ring piece having an annular outer shape, a temporary fixing jig piece that is disposed on the inner diameter side of the outer ring piece and has a shape that engages with the outer ring piece, and the outer ring piece and the temporary fixing jig piece are engaged. A punching process for punching from the core sheet in the combined state,
A laminating step of laminating a plurality of the outer ring pieces and the temporary fixing jig pieces engaged with each other;
A temporary fixing step of forming the temporary fixing jig by fixing the laminated temporary fixing jig pieces to each other;
A method for manufacturing a laminated iron core. After the temporary fixing step,
A main fixing step of fixing the laminated outer ring pieces to each other to form an outer ring core;
A separation step of separating the outer ring core and the temporary fixing jig;
The manufacturing method of the laminated iron core of Claim 1 which has these. In the punching step, an inner ring piece having a shape that engages with the temporary fixing jig piece is disposed on an inner diameter side of the temporary fixing jig piece, and the outer ring piece, the inner ring piece, and the temporary fixing jig are arranged. While punching the pieces from the core sheet in a state of being engaged with each other,
The method for manufacturing a laminated core according to claim 1, wherein in the laminating step, a plurality of the outer ring pieces, the inner ring pieces, and the temporary fixing jig pieces that are engaged with each other are laminated. After the temporary fixing step,
A main fixing step of fixing the laminated outer ring piece and the inner ring piece to each other to form an outer ring core and an inner ring core;
A separation step of separating the outer ring core, the inner ring core and the temporary fixing jig from each other;
The manufacturing method of the laminated iron core of Claim 3 which has these. An outer ring piece having an annular outer shape, a temporary fixing jig piece arranged on the inner diameter side of the outer ring piece, and an inner diameter side of the temporary fixing jig piece and engaging with the temporary fixing jig piece From the core sheet in which the inner ring piece having a shape is arranged, the inner ring piece and the temporary fixing jig piece are punched out while being engaged with each other; and
A lamination step of laminating a plurality of the inner ring pieces and the temporary fixing jig pieces that are engaged with each other;
A temporary fixing step of forming the temporary fixing jig by fixing the laminated temporary fixing jig pieces to each other;
A method for manufacturing a laminated iron core. After the temporary fixing step,
A main fixing step of fixing the laminated inner ring pieces to each other to form an inner ring core;
A separation step of separating the inner ring core and the temporary fixing jig;
The manufacturing method of the laminated iron core of Claim 5 which has these. The method of manufacturing a laminated core according to any one of claims 1 to 6, wherein the temporary fixing jig piece is fixed in the temporary fixing step by caulking. The method for manufacturing a laminated core according to claim 2 or 4, wherein the outer ring piece is fixed in the main fixing step by a resin filling process. The method for manufacturing a laminated core according to claim 4 or 6, wherein the inner ring piece is fixed in the main fixing step by a resin filling process. In the punching step, the temporary fixing jig piece punched from the core sheet protrudes from the annular portion and the annular portion, and fits into a gap between the teeth formed on the outer ring piece. The manufacturing method of the laminated iron core of Claim 1 or Claim 3. The method for manufacturing a laminated core according to claim 10, wherein at least one portion of the annular portion of the temporary fixing jig piece is cut off. An outer ring piece having an annular outer shape, and a laminated body formed by laminating a plurality of temporary fixing jig pieces that are arranged on the inner diameter side of the outer ring piece and engage with the outer ring piece,
The laminated temporary fixing jig pieces are fixed to each other to form a temporary fixing jig. The lamination according to claim 12, wherein an inner ring piece disposed on an inner diameter side of the temporary fixing jig piece and engaged with the temporary fixing jig piece is laminated together with the outer ring piece and the temporary fixing jig piece. body.

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