JP5357187B2 - Manufacturing method of laminated core and manufacturing jig thereof - Google Patents

Abstract

Provided are a method for manufacturing a laminated core wherein the workability of winding and assembly can be enhanced without degrading the magnetic performance of a laminated core, and a tool for manufacturing same. A core sheet (50), which consists of a tooth (11b) and a back yoke (11a) formed by projecting the tooth (11b) from the arcuate central portion to the center side and fitting a fitting protrusion (12a), which is one of the wings of a butterfly-shaped scrap (12), to the opposite side by push-back, is punched out from a steel plate.  A plurality of the core sheets (50) are laminated, the front and back surfaces of adjoining scraps (12) are fixed to each other by caulking a fixing recess (12d) and a fixing protrusion (12e), the laminated layers of the laminated core (11) are fixed to each other, and then the laminated scrap (12) is removed from the laminated back yoke (11a).

Description

  The present invention relates to a method for manufacturing a laminated core including a step of punching a core sheet from a steel sheet and laminating to produce a laminated core, a step of attaching an insulator to the laminated core, and a step of winding the laminated core through the insulator. The present invention relates to a method and a manufacturing jig thereof, and particularly relates to a manufacturing method of a laminated core that reduces iron loss of a product and the manufacturing jig thereof.

  The laminated core is manufactured by punching a core sheet from a steel plate and binding the plural sheets in a laminated state, and is used for a motor core, a transformer core, and the like. In the conventional method for manufacturing a laminated core, a fixing means by caulking is used between the laminations of the core sheets, but a method for producing a laminated core that does not leave a caulked part in the product part is also disclosed in order to reduce the iron loss of the product. (For example, refer to Patent Document 1).

  In this manufacturing method, first, a progressive die is used, and a core sheet in which a core part used as a product and a scrap part pushed back by pushback after punching are integrated is punched from a steel plate. The push back referred to here is a processing method in which the punched portion is once punched in a half punched state or a completely punched state to be almost separated and then pushed back into the punched hole.

  Subsequently, the punched core sheets are sequentially laminated in a die of a mold, and the laminated core sheets are temporarily bound by a caulking portion provided in the scrap portion every predetermined number of sheets, thereby forming a laminated core. Next, the core part of the laminated core taken out from the progressive press die is finally bound by bonding or welding, and then the scrap part is removed to obtain a product. According to this, since the coupling means such as the crimping portion does not remain in the core as a product, the iron loss can be reduced and the magnetic performance can be improved.

JP 2007-295668 (0013 stage, FIG. 3)

However, the conventional method for manufacturing a laminated core has a problem that the scrap portion has a large contact area with the outer peripheral surface of the core portion, and the contact resistance is large at the time of detachment and cannot be easily removed.
In addition, when the laminated core after separating the scrap part is press-fitted into the frame for holding the shape and position of the laminated core, it is easy to assemble with the frame due to deformation that occurred on the outer peripheral surface of the core part at the time of separation. And the roundness of the stator deteriorates.

  Furthermore, when bonding is used for the main binding means of the laminated core, it is difficult to inject an adhesive between the core sheets that have already been temporarily bound, and to remove excess adhesive that protrudes between the core sheets. However, there is a problem that the space factor of the laminated core is lowered by the adhesive injection. Moreover, when using welding, there existed a problem that a short circuit was produced in order to melt between the core sheets of the location used as a product, and an iron loss was produced in this location.

  The present invention has been made to solve the above problems, and a method for manufacturing a laminated core capable of improving the workability of winding and assembling without deteriorating the magnetic performance of the laminated core, and its manufacturing process. The purpose is to provide ingredients.

The method for manufacturing a laminated core according to the present invention includes a teeth portion and a teeth portion projecting toward the center at an arc-shaped central portion, and a fitting portion of a butterfly scrap portion and a fitting portion of a back yoke portion. A core sheet having a step of punching a detaching hole for forming a detaching recess in the fitting portion and a back yoke portion fitting one wing portion of the butterfly scrap portion by pushback on the opposite side A step of punching from a steel sheet, a step of laminating a plurality of the core sheets, a step of adhering the front and back surfaces of adjacent scrap portions, and a lamination between the laminations of the teeth portion and the back yoke portion of the laminated core sheets were laminated. And a step of removing the scrap part from the laminated back yoke part.
In addition, the tooth part and this tooth part project from the center of the arc-shaped center part, and a recess for separation is formed in the fitting part between the fitting part of the butterfly scrap part and the fitting part of the back yoke part. A step of punching a release hole for cutting, a step of punching a core sheet having a back yoke part fitted with one wing part of a butterfly-shaped scrap part by pushback on the opposite side, and the core sheet From the back yoke part in which the laminated scrap parts are laminated after the process of adhering the front and back surfaces of the adjacent scrap parts and the lamination between the teeth part and the back yoke part of the laminated core sheet. Including the step of detaching, the stacked scrap portion is removed from the stacked back yoke portion after being moved in the inner diameter direction of the stacked back yoke portion.

In addition, the laminated core manufacturing jig according to the present invention has a teeth portion and the teeth portion projecting toward the center at an arc-shaped center portion, and the fitting portion between the butterfly scrap portion and the back yoke portion is fitted. A core sheet comprising a back yoke portion in which a detaching hole for forming a detaching recess is formed in a mating portion with a butt portion and one wing portion of a butterfly-shaped scrap portion is fitted by pushback on the opposite side From the steel sheet, laminating a plurality of core sheets, adhering the front and back surfaces of the adjacent scrap portions, and adhering between the laminations of the teeth portion and back yoke portion of the laminated core sheets, from the laminated back yoke portion It consists of stacked scrap parts to be removed.
In addition, the tooth part and this tooth part project from the center of the arc-shaped center part, and a recess for separation is formed in the fitting part between the fitting part of the butterfly scrap part and the fitting part of the back yoke part. punching withdrawal hole for the opposite side to the punched core sheet made of the back yoke part and fitted to one of the vanes form part of the scrap portion of the butterfly by the push-back of a steel plate, a plurality of core sheets stacked And adhering the front and back surfaces of the adjacent scrap parts, and adhering between the laminations of the teeth and back yoke parts of the laminated core sheets, and then comprising the laminated scrap parts removed from the laminated back yoke parts. The scrap portion is moved in the inner diameter direction of the laminated back yoke portion and then removed from the laminated back yoke portion. The laminated scrap portion is laminated. After moving to the inner diameter direction of the back yoke part, it is intended to be removed from the laminated back yoke unit.

  According to the present invention, the laminated core is permanently bound in a state in which the cross section in the lamination direction is temporarily bound by a butterfly-shaped manufacturing jig, and the manufacturing jig is removed after the binding so that the laminated core does not come into contact with the outer peripheral surface of the laminated core. Since the outer peripheral surface is not deformed, the fixing jig can be easily removed.

  Further, when the stator is formed, even when the laminated core is press-fitted into the frame in order to hold the shape and position, the outer peripheral surface is not deformed, so that the assembly with the frame and the roundness of the stator can be improved. .

It is a top view which shows the structure of the core sheet in Embodiment 1 of the manufacturing method of the laminated core which concerns on this invention. It is a perspective view which shows the structure of the laminated core which consists of a core sheet in Embodiment 1 of the manufacturing method of the laminated core which concerns on this invention. It is sectional drawing which shows the structure of the stator which consists of a laminated core in Embodiment 1 of the manufacturing method of the laminated core which concerns on this invention. It is a top view which shows the formation process of the core sheet by press punching in Embodiment 1 of the manufacturing method of the laminated core which concerns on this invention. It is a schematic diagram which shows an example of the winding process in the winding apparatus in Embodiment 1 of the manufacturing method of the laminated core which concerns on this invention. It is sectional drawing which shows the structure of the laminated core after the winding process in Embodiment 1 of the manufacturing method of the laminated core which concerns on this invention. It is a perspective view which shows the process of coat | covering the molded product of insulating resin to the laminated core in Embodiment 2 of the manufacturing method of the laminated core which concerns on this invention. It is a front view which shows the structure of the stator core in other embodiment of the manufacturing method of the laminated core which concerns on this invention. It is a front view which shows the structure of the stator core in other embodiment of the manufacturing method of the laminated core which concerns on this invention. It is a front view which shows the structure of the stator core in other embodiment of the manufacturing method of the laminated core which concerns on this invention. It is a top view which shows the structure of the core sheet in Embodiment 3 of the manufacturing method of the laminated core which concerns on this invention. It is a perspective view which shows the structure of the laminated core which consists of a core sheet in Embodiment 3 of the manufacturing method of the laminated core which concerns on this invention.

Hereinafter, various embodiments of a method for manufacturing a laminated core according to the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a plan view showing an example of a core sheet that forms a laminated core of a split stator when the laminated core manufacturing method according to Embodiment 1 of the present invention is applied. FIG. 2 is a perspective view of a laminated core formed by laminating the core sheets in FIG. 1, and FIG. 3 is a front view of a stator including a plurality of laminated cores.

  In FIG. 1, a core sheet 50 includes a core portion 11 that is a product portion and a scrap portion 12 as a manufacturing jig that is fitted and fixed to the core portion 11 by pushback. The core part 11 forms a T-shaped plate composed of a back yoke part 11a and a tooth part 11b, and a tooth part 11b projects from the central part of the back yoke part 11a toward the center of the annular ring.

  The back yoke portion 11a is provided with a fitting recess 11c in which the scrap portion 12 is fitted and fixed to the center portion on the opposite side of the tooth portion 11b. At both ends of the back yoke portion 11a, there are provided an engaging concave portion 11d and an engaging convex portion 11e with which the adjacent core portions 11 engage with each other when forming the stator.

  The scrap part 12 is provided in a butterfly shape, and one wing-shaped part is a fitting convex part 12a fitted and fixed to the fitting concave part 11c of the back yoke part 11a. The other is a gripping convex portion 12b gripped by a fixed portion (not shown) of a manufacturing apparatus such as a winding machine.

  In FIG. 1, the fitting convex portion 12 a and the grip convex portion 12 b of the scrap portion 12 are both configured in a wedge shape, but are not limited thereto. For example, each may be a substantially circular shape, a substantially elliptical shape, or the like, and need not be symmetrical or similar.

  The gripping convex portion 12b may be rectangular. The butterfly shape of the scrap portion 12 is such that the fitting convex portion 12a fits and fixes the back yoke portion 11a of the core portion 11 and the gripping convex portion 12b is fixed. The center part 12c which can be hold | gripped by the fixing | fixed part of a manufacturing apparatus should just be the shape where the center part 12c was constricted. With this shape, the contact portion between the scrap portion 12 and the outer peripheral portion of the core portion 11 can be reduced. Moreover, it can fix reliably to the fixing | fixed part of a manufacturing apparatus.

In order to reduce the contact area of the fitting portion with the fitting concave portion 11c of the back yoke portion 11a, an end portion of the scraping portion 12 is provided with a detaching concave portion 12f at a predetermined position and shape.
A separation recess 11f may be provided at the end on the fitting recess 11c side. In FIG. 1, the recesses 12f, 12g, and 12h for detachment and the recesses 11f, 11g, and 11h for detachment are provided at three positions on both sides of the fitting protrusion 12a and the fitting recess 11c by punching in the interface of the fitting portion. An example is shown.

  On the front and back surfaces of the scrap portion 12, a fixing concave portion 12d and a fixing convex portion 12e are provided, respectively. The core sheet 50 is fixed in the stacking direction by caulking the corresponding fixing concave portions 12d and fixing convex portions 12e between the adjacent scrap portions 12 during stacking.

  The stacked, crimped, and fixed scrap portions 12 form a fixing jig for temporarily binding the stacked core portions 11 in a stacked state. The core portions 11 temporarily bound by the fixing jig are finally bound to form a laminated core. FIG. 2 shows the laminated core 110 that is integrally formed with the insulating resin 13 by die-cast molding in a state of being temporarily bound by the fixing jig 120 and is finally bound.

  The fixing jig 120 holds the holding projection 120b (stacked holding projection 12b) by caulking even in the laminating direction, and the laminating lateral direction is held at the time of main binding such as the insulating resin molding process and the winding process. It can fix by grasping the convex part 120b for use, and can laminate | stack the laminated core 110 (laminated core part 11) reliably reliably.

  The fixing jig 120 is removed from the fitting recess 11c of the back yoke portion 11a after the laminated core 110 is integrally formed with the insulating resin 13 and wound, and then slid in the laminating direction (A direction in FIG. 2). . Since the fixing jig 120 has a butterfly-shaped cross section with respect to the axis in the stacking direction and the central portion 120c is constricted, the fixing jig 120 does not come into contact with the outer peripheral surface of the stacked core 110 and does not deform the outer peripheral surface. It can be easily removed.

  In addition, the fixing jig 120 includes separation grooves 120f, 120g, and 120h (stacked separation recesses 12f, 12g, and 12h) at the ends of the fitting protrusions 120a (stacked fitting protrusions 12a), and the laminated core 110. The fitting recesses 110c (stacked fitting recesses 11c) end detachment grooves 110f, 110g, and 110h (stacked detachment recesses 11f, 11g, and 11h), the fitting projections 120a end and the fitting recess 110c. The contact area with the end portion can be reduced, and the end portion of the fitting convex portion 120a and the end portion of the fitting concave portion 110c can be elastically deformed and easily removed.

  After the fixing jig 120 is removed, the laminated cores 110 are joined together so that the plurality of laminated cores 110 are connected so that the back yoke portions 110a (stacked back yoke portions 11a) are substantially annular. A stator 200 as shown in FIG. 3 is formed by projecting a tooth portion 110b (laminated tooth portion 11b) in the center direction inside the annular shape.

  Next, the manufacturing method of the laminated core 110 in this Embodiment 1 is demonstrated. FIG. 4 shows a process of forming the core sheet 50 by punching from a steel plate using a press die.

  As shown in FIG. 4, the punching process proceeds in the order of the downward arrow B, and the hatched portion in FIG. 4 represents the punched portion. FIG. 4A shows the first step, FIG. 4F shows the last step, and the view shown in the direction of the left arrow C in the drawing is the core sheet 50 after punching is completed.

  First, in the process of FIG. 4A, a pilot hole 15 serving as a positioning reference in press working is punched into a thin steel plate 14 made of a magnetic material such as an electromagnetic steel plate. The steel plate 14 has a thickness of 0.2 to 0.5 mm. When one process is completed, the steel plate 14 is conveyed by a predetermined dimension between the pilot holes 15 and proceeds to the next process.

  Subsequently, in the process of FIG. 4B, the detaching holes 16f for forming the detaching recesses 12f, 12g, 12h and the detaching recesses 11f, 11g, 11h with reference to the pilot holes 15 formed in the steel plate 14. 16g and 16h are punched out.

  Next, in the step of FIG. 4C, a region 17 for cutting out the outer periphery of the portion that becomes the gripping convex portion 12b of the scrap portion 12 and the outer peripheral portion around the fitting concave portion 11c of the back yoke portion 11a is punched out.

  Subsequently, in the step of FIG. 4D, the fixing concave portion 12d and the fixing convex for fixing the core sheets 50 to be laminated to each other on the front and back surfaces of the central portion of the grip convex portion 12b of the scrap portion 12 by caulking. The portion 12e is provided by pressing.

  Next, in the step of FIG. 4 (e), by pushing back the region of the scrap portion 12, the fitting convex portion 12a of the scrap portion 12 is punched out and then pushed back into the fitting concave portion 11c to be fitted and fixed. .

  Simultaneously with the formation of the fitting convex portion 12a of the scrap portion 12, the separation holes 16f, 16g, and 16h are divided to form the separation recesses 12f, 12g, and 12h and the separation recesses 11f, 11g, and 11h.

  Subsequently, in the process of FIG. 4 (f), the outer shape of the core portion 11 is punched, and the fitting convex portion 12a of the scrap portion 12 is fitted and fixed to the fitting concave portion 11c of the back yoke portion 11a. A core sheet 50 made of is cut out (direction of arrow C).

  Similarly, by repeating the cutting of the core sheet 50 and fixing by caulking by the steps of FIGS. 4A to 4F, a desired number of core sheets (50-1, 50-2,... 50-n) (n is an integer) are laminated, the fixing concave portions 12d and the fixing convex portions 12e of the adjacent core sheets are fixed, and the laminated core 110 temporarily bound by the fixing jig 120 is obtained.

  In the step of FIG. 4D, the first core sheet 50-1 and the last core sheet 50-n of the laminated core 110 temporarily bundled by the fixing jig 120 are fixed only on the inner side in the stacking direction. By forming the concave portion 12d and the fixing convex portion 12e, or the fixing hole portion and the fixing convex portion 12e, a laminated core 110 temporarily bonded in a desired number can be obtained, and the laminated cores 110 are fixed to each other. Therefore, the laminated core 110 can be obtained continuously.

  Next, the laminated core 110 in a temporarily bound state is fixed to the mold of the molding machine with the holding protrusion 120b held by the fixing jig 120. The laminated core 110 is integrally formed by die-cast molding, and as shown in FIG. 2, the teeth 110 b (laminated teeth 11 b) and its peripheral part are covered with an insulating resin 13 so as to be permanently bound.

  As shown in FIG. 5, the laminated core 110 that has been bundled grips the gripping convex portion 120 b of the fixing jig 120 that is still fitted with the gripping portion 31 of the winding machine 300, and the winding machine By rotating the 300 nozzles 32 around the tooth portion 110b in a circular orbit, the winding 18 is applied to the tooth portion 110b (laminated tooth portion 11b) of the laminated core 110 covered with the insulating resin 13. FIG. 6 shows a cross-sectional view of the bundled laminated core 110 after winding.

  After winding, the fixing jig 120 is removed from the fitting recess 110c of the laminated core 110 by sliding in the lamination direction (A direction in FIG. 2). The plurality of laminated cores 110 from which the fixing jig 120 is removed are connected so that the back yoke part 110a has a substantially annular shape, and the teeth part 110b projects in the center direction inside the annular shape. A stator 200 as shown is obtained.

  As described above, in the first embodiment, the laminated core 110 is temporarily bound in a state in which the section in the stacking direction is temporarily bound by the butterfly-shaped fixing jig 120, and the fixing jig 120 is removed after the final binding. Since the central part between the fitting part and the grip part of the fixing jig is constricted, the fixing jig can be easily removed without contacting the outer peripheral surface of the laminated core and without deforming the outer peripheral surface. it can.

  Further, when the stator is formed, even when the laminated core is press-fitted into the frame in order to hold the shape and position, the outer peripheral surface is not deformed, so that the assembly with the frame and the roundness of the stator can be improved. .

  Further, by using the fixing jig 120 having a butterfly-shaped cross section in the stacking direction, gripping by the manufacturing apparatus is facilitated, and the stacking core can be reliably restrained and fixed even in the stacking lateral direction.

  Further, since the stator without the caulking portion can be manufactured without using welding for the main binding means of the laminated core, the iron loss of the product can be reduced. Further, there is no difficult work as in the case where adhesion is used for the binding means, and the space factor of the laminated core is not reduced.

Embodiment 2. FIG.
In the manufacturing method of the laminated core according to the first embodiment, the case where the bundled core is temporarily bound by integrally forming the laminated core 110 temporarily bound by the fixing jig 120 with the insulating resin 13 has been described. In the second embodiment, a case where the laminated core is covered with a molded product of an insulating resin and then wound and wound is shown.

  FIG. 7 is a perspective view for explaining a process of covering a molded product of insulating resin in the method for manufacturing a laminated core according to Embodiment 2 of the present invention. In the method for manufacturing a laminated core in the second embodiment, the laminated core 110 in a temporarily bound state obtained in the steps of FIGS. 4A to 4F in the first embodiment is replaced with the winding machine shown in FIG. The holding convex portion 120b is held and fixed by the fixing jig 31 of 300.

Next, the laminated core 110 in a temporarily bound state covers the teeth 110b (laminated teeth 11b) and the peripheral portions thereof with the insulating resin moldings 19 and 20 from above and below with the gripping convex portion 120b gripped. Then, the winding 18 is applied from above, and this binding is performed.
The molded products 19 and 20 of the insulating resin constrain the laminating lateral direction of the laminated core 110, and the winding 18 constrains the laminating direction and further strengthens the lateral binding.

  In the second embodiment, the insulation resin moldings 19 and 20 and the windings 18 are used to form the bundle, but the insulating resin molding 19 and the insulating resin molding 20 covered from above and below are used. If the fitting portion is provided at the portion where the two are combined and the stacking direction is constrained, the main bundling can be performed only by covering the molded products 19 and 20 of the insulating resin.

  As described above, in the second embodiment, the laminated core 110 in a temporarily bound state is covered with the previously formed insulating resin moldings 19 and 20 in a state where the gripping convex portion 120b is gripped. Because it is made to bind, it does not require a laminated core to mold the insulating resin, and it is possible to parallelize the molding process of the insulator, so the equipment does not need to be in-line with a large molding machine. The stator production line can be operated without being affected by the insulator forming process having a long process work time.

In addition, although Embodiment 1 and 2 demonstrated the manufacturing method of the lamination | stacking core of a split type stator, it does not restrict to this. For example, the present invention can be applied to manufacture of a connection type stator, a joint type stator, and an integral type stator.

  8 to 10 show front views of the connection type stator core 201, the joint type stator core 202, and the integral type stator core 203, respectively. In any laminated core 110, the same effect can be obtained by providing a fixing jig 120 (laminated scrap portion 12) having a butterfly-shaped cross section in a predetermined position at a predetermined position.

Embodiment 3 FIG.
In the manufacturing method of the laminated core according to the first embodiment, the case where the fixing jig 120 is removed from the fitting recess 11c of the back yoke portion 11a by only sliding in the laminating direction after the main binding is shown. In the third embodiment, a case where the processing force necessary for removing the fixing jig is reduced and then removed by sliding is described.

  FIG. 11 is a plan view showing an example of a core sheet in Embodiment 3 of the present invention. 12 shows a process of removing the fixing jig 120 after forming the laminated core 110 from the core sheet shown in FIG. 11 in the same manner as in the first embodiment, and finally binding the laminated core 110 and winding it. It is a perspective view (winding is not shown) which shows a portion.

  First, the structure of the core sheet in this Embodiment 3 is shown using FIG. In the core sheet 51, instead of the separation holes 16f, 16g, and 16h in the first embodiment, the space between the entire end portion 12i of the fitting convex portion 12a of the scrap portion 12 and the fitting concave portion 11c of the back yoke portion 11a. In addition, a release hole 26 for releasing the fitted state is provided.

  Other configurations are the same as those in the first embodiment, and the same reference numerals as those in FIG.

  According to this, in the core sheet 51, the portions where the scrap portion 12 and the back yoke portion 11a are fitted and fixed are the fitting surfaces 12j and 11j, the fitting surfaces 12k and 11k, and these fitting portions. The fixing recesses 12d and the fixing protrusions 12e provided on the front and back surfaces of the scrap portion 12 are caulked when the core sheets 50 are stacked, whereby the core sheet 51 is fixed in the stacking direction.

  Next, a method for removing the fixing jig 120 (the stacked scrap portions 12) will be described with reference to FIGS. First, with respect to the laminated core 110 (the laminated core portion 11), the fixing jig 120 is directed from the back yoke portion 11a toward the teeth portion 11b, that is, in the inner diameter direction of the laminated core 110 (FIGS. 11 and 12). Pressurize once in the B direction).

  FIG. 12 shows a state in which the fixing jig 120 is moved relative to the laminated core 110 in the inner diameter direction after the pressurization. As shown here, the fixing jig 120 can be relatively moved in the inner diameter direction by the detachment hole 26, and a gap is generated between the fitting surfaces 120j and 110j and the fitting surfaces 120k and 110k. Can be canceled.

  Subsequently, after the fixing jig 120 is moved relative to the laminated core 110 in the inner diameter direction, the fixing jig 120 is slid in the lamination direction of the laminated core 110 (A direction in FIG. 12). The fixing jig 120 can be slid in the stacking direction of the laminated core 110 with little force, and the fixing jig 120 can be easily removed from the laminated core 110.

  Further, as shown in FIG. 11, the scrap portion 12 is provided in a butterfly shape, so that the fitting surface 12j and the fitting surface 12k of the fitting convex portion 12a become the fitting surface 11j and the fitting surface 11j of the back yoke portion 11a. Even if a force in the outer diameter direction (the direction opposite to B in FIGS. 11 and 12) acts on the laminated core 110 on the fixing jig 120 by being fixed in the outer diameter direction by the fitting surface 11k. The fitting state of the fitting surface can be maintained due to geometric constraints.

  By utilizing this, in the manufacturing process of the stator including the process of attaching the insulator to the laminated core 110, the winding process, etc., the laminated core 110 can be attached to a device or a jig without disassembling the laminated core 110 and the fixing jig 120. It can be firmly fixed to the tool.

  As described above, according to the third embodiment, the separation hole 26 is provided between the end of the fitting convex portion 12a of the scrap portion 12 and the fitting concave portion 11c of the back yoke portion 11a. The tool can be relatively moved in the inner diameter direction, and a gap is formed between the tool and the back yoke portion, and the fitted state can be easily released.

  In addition, the fixing jig can be slid in the stacking direction of the laminated core with little force required by the gap, and the fixing jig can be easily removed from the laminated core.

  Moreover, even if the force to the outer-diameter direction of a lamination | stacking core acts on a fixing jig by providing the scrap part 12 in butterfly shape, a fitting state can be maintained. Furthermore, in the manufacturing process of the stator including the process of attaching the insulator to the laminated core and the winding process, the laminated core can be firmly fixed to the apparatus or jig without disassembling the laminated core and the fixing jig. Is possible.

  In the third embodiment, the method of manufacturing the laminated core of the split stator has been described, but the present invention is not limited to this. For example, the present invention can be applied to manufacture of a connection type stator, a joint type stator, and an integral type stator.

  In any of the laminated cores 110 shown in FIGS. 8 to 10, a fixing jig 120 (laminated scrap portion 12) having a butterfly-shaped cross section provided with a detaching hole 26 is provided at a predetermined position. Thus, the same effect can be obtained.

11a Back yoke part 11b Teeth part 12 Scrap part 12a Fitting convex part 12b Grasping convex part 13 Insulating resin 18 Windings 19, 20 Molded product 110 of insulating resin Laminated core 110a Back yoke part 110b Teeth part 120 Fixing jig 120a Fitting Joint convex part 120b Grasping convex part 50, 51 Core sheet

Claims (9)

Teeth and projecting from the center side of the tooth portion by an arcuate central portion, to form a leaving recesses in the fitting portion of the fitting portion of the fitting portion and the back yoke portion of the scrap portion of the butterfly The process of punching the release holes of
A step of punching out the core sheet with the back yoke portion fitted to one of the vanes form part of the scrap portion of the butterfly by pushback on the opposite side from the steel plate,
A step of said core sheet laminating a plurality to secure the front and back surfaces of the scrap portions adjacent respectively,
After fixation between lamination of the teeth and the back yoke portions of the core sheets the laminate, the manufacturing method of the laminated core and a step of removing the scrap portions which are stacked from the back yoke part and the laminate. Teeth and projecting from the center side of the tooth portion by an arcuate central portion, to form a leaving recesses in the fitting portion of the fitting portion of the fitting portion and the back yoke portion of the scrap portion of the butterfly a step of punching out the withdrawal hole of a step of punching out the back yoke unit core sheet having a fitted one of the wing-shaped part of the scrap portion of the butterfly by pushback on the opposite side from the steel plate, the core sheet the laminating a plurality, and a step of fixing the front and back surfaces of the scrap portions adjacent respectively, after fixed between lamination of the teeth and the back yoke portions of the core sheets the laminate, the scrap portion by laminating the and a step of removing the laminated back yoke section, the scrap portion has been stacked, after moving to the inner diameter direction of the back yoke part and the laminate was the laminated Bakkuyo Method for manufacturing a laminated core, characterized in that it is removed from the parts. The laminated core sheets, the manufacturing method of the laminated core according to claim 1 or claim 2, characterized in that fixed between the laminate by integrally molding an insulating resin the teeth and the back yoke unit. The core sheets the laminate is laminated according to claim 1 or claim 2, characterized in that fixed between the stack by fitting the teeth and the back yoke portion covered by molding an insulating resin Core manufacturing method. Claim the teeth portion which is fixed between laminated with an insulating resin, when the winding, which grips the other vane forms part of the laminated scrap portion, characterized in that to fix the laminated core sheets The manufacturing method of the lamination | stacking core of 3 or Claim 4. The laminated core sheets, after covering the teeth and the back yoke unit by molding an insulating resin, according to claim 1 or claim, characterized by fixing between the laminate by winding the teeth Item 3. A method for producing a laminated core according to Item 2. During winding, grip the other vane forms part of the scrap portion and the laminated, method for manufacturing a laminated core according to claim 6, characterized in that to fix the core sheets the laminate. Teeth and projecting from the center side of the tooth portion by an arcuate central portion, to form a leaving recesses in the fitting portion of the fitting portion of the fitting portion and the back yoke portion of the scrap portion of the butterfly punching detachment hole, opposite the push-back by punching a core sheet of a steel plate consisting of the back yoke unit fitted to one of the vanes form part of the scrap portion of the butterfly type, a plurality laminating the core sheet And adhering the front and back surfaces of the adjacent scrap portions, and adhering between the laminated portions of the teeth portion and the back yoke portion of the laminated core sheet, and then removing the laminated back yoke portion from the laminated portion. A manufacturing jig for laminated cores consisting of scrap parts. Teeth and projecting from the center side of the tooth portion by an arcuate central portion, to form a leaving recesses in the fitting portion of the fitting portion of the fitting portion and the back yoke portion of the scrap portion of the butterfly punching detachment hole, opposite the push-back by punching a core sheet of a steel plate consisting of the back yoke unit fitted to one of the vanes form part of the scrap portion of the butterfly type, a plurality laminating the core sheet Then, the stacked scraps that are removed from the stacked back yoke portions after fixing the front and back surfaces of the scrap portions adjacent to each other and fixing between the stacked portions of the teeth portion and the back yoke portion of the stacked core sheets. The laminated scrap portion is removed from the laminated back yoke portion after being moved in the inner diameter direction of the laminated back yoke portion. Manufacturing jig laminated core.

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