WO2010082465A1 - 積層コアの製造方法及びその製造治具 - Google Patents
積層コアの製造方法及びその製造治具 Download PDFInfo
- Publication number
- WO2010082465A1 WO2010082465A1 PCT/JP2010/000078 JP2010000078W WO2010082465A1 WO 2010082465 A1 WO2010082465 A1 WO 2010082465A1 JP 2010000078 W JP2010000078 W JP 2010000078W WO 2010082465 A1 WO2010082465 A1 WO 2010082465A1
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- WIPO (PCT)
- Prior art keywords
- laminated
- laminated core
- core
- back yoke
- scrap
- Prior art date
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/022—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with salient poles or claw-shaped poles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0233—Manufacturing of magnetic circuits made from sheets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/187—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to inner stators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/08—Forming windings by laying conductors into or around core parts
- H02K15/095—Forming windings by laying conductors into or around core parts by laying conductors around salient poles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/10—Applying solid insulation to windings, stators or rotors
Definitions
- 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 or a transformer 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).
- a progressive die is used, and a core sheet in which a core portion used as a product and a scrap portion 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.
- the punched core sheets are sequentially laminated in the die of the mold, and the laminated core sheets are temporarily bundled at a predetermined number of the crimped portions provided in the scrap portion to form a laminated core.
- 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.
- 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.
- the laminated core after separating the scrap part is press-fitted into the frame for maintaining 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.
- 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 tooth portion and a tooth portion protruding from a central portion at an arc-shaped central portion, and one wing portion of a butterfly-shaped scrap portion is fitted to the opposite side by pushback.
- a step of removing the laminated scrap portion from the laminated back yoke portion after fixing between the laminated layers is a step of punching a core sheet composed of a combined back yoke portion from a steel plate, a step of laminating a plurality of core sheets and fixing the front and back surfaces of adjacent scrap portions, and a tooth portion and a back yoke portion of the laminated core sheet.
- the laminated core manufacturing jig according to the present invention includes a tooth portion and one tooth shape of a butterfly-shaped scrap portion formed by projecting the teeth portion toward the center at an arc-shaped central portion and pushing back on the opposite side.
- a core sheet composed of a back yoke part fitted with a part is punched out of a steel sheet, a plurality of core sheets are laminated, and the front and back surfaces of adjacent scrap parts are respectively fixed, and the teeth part and back yoke part of the laminated core sheet are fixed. It consists of the laminated
- 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.
- stator 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.
- FIG. 1 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
- FIG. 1 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.
- 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
- FIG. 3 is a front view of a stator including a plurality of laminated cores.
- a core sheet 50 includes a core part 11 that is a product part and a scrap part 12 as a manufacturing jig that is fitted and fixed to the core part 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 teeth 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.
- the fitting convex portion 12a and the gripping convex portion 12b of the scrap portion 12 are both formed in a wedge shape, but the present invention is not limited to this.
- 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.
- fixed part of a manufacturing apparatus should just be the shape which the neck part narrowed. 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
- 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.
- the recesses 12 f, 12 g, 12 h for detachment and the recesses 11 f, 11 g, 11 h for detachment are provided at three positions on both sides of the fitting convex portion 12 a and the fitting recess 11 c by punching out in the fitting portion interface. An example is shown.
- 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.
- 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
- 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.
- 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.
- 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.
- FIG. 4 shows a process of forming the core sheet 50 by punching from a steel plate using a press die.
- 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
- the drawing shown in the direction of the left arrow C in the drawing is the core sheet 50 after punching is completed.
- a pilot hole 15 serving as a reference for positioning 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.
- 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.
- 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.
- the detaching holes 16f, 16g, and 16h are divided to form the detaching concave portions 12f, 12g, and 12h and the detaching concave portions 11f, 11g, and 11h.
- 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.
- the first core sheet 50-1 and the last core sheet 50-n of the laminated core 110 temporarily bound by the fixing jig 120 are fixed only on the inner side in the stacking direction.
- 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.
- 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.
- FIG. 5 shows a cross-sectional view of the bundled laminated core 110 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 is substantially annular, and the teeth part 110b protrudes in the center direction inside the annular shape, so that FIG. A stator 200 as shown is obtained.
- 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.
- stator 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.
- the fixing jig 120 having a butterfly cross section in the stacking direction the gripping by the manufacturing apparatus is facilitated, and the stacking core can be reliably restrained and fixed in the stacking lateral direction.
- stator without the caulking portion can be manufactured without using welding for the present bundling 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 In the manufacturing method of the laminated core according to the first embodiment, the case where the laminated core 110 temporarily bonded by the fixing jig 120 is integrally formed with the insulating resin 13 so as to be bundled is shown. 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.
- 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.
- the laminated core 110 in a temporarily bound state covers the teeth portion 110b (laminated teeth portion 11b) and the peripheral portions thereof with the moldings 19 and 20 of the insulating resin from above and below in a state where the holding convex portion 120b is held. 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 windings 18 constrain the laminating direction and further strengthen the lateral binding.
- 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.
- 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.
- Embodiment 1 and 2 demonstrated the manufacturing method of the lamination
- the present invention can be applied to manufacture of a connection type stator, a joint type stator, and an integral type stator.
- FIGS. 8 to 10 are front views of the connected stator core 201, the articulated stator core 202, and the integrated stator core 203, respectively.
- 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 In the method for manufacturing 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 only by 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 according to 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.
- the configuration of the core sheet in the third embodiment will be described with reference to FIG.
- 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.
- a release hole 26 for releasing the fitted state is provided.
- 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.
- 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.
- 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.
- the fixing jig 120 is moved relative to the laminated core 110 in the inner diameter direction, and then 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.
- 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.
- 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.
- 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.
- the fixing jig can be slid in the stacking direction of the laminated core with almost no force by this gap, and the fixing jig can be easily removed from the laminated core.
- the scrap portion 12 is provided in a butterfly shape, the fitting state can be maintained even if a force in the outer diameter direction of the laminated core acts on the fixing jig. 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.
- the present invention is not limited to this.
- the present invention can be applied to manufacture of a connection type stator, a joint type stator, and an integral type stator.
- 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.
- the same effect can be obtained.
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- Manufacture Of Motors, Generators (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
Description
また、スクラップ部を離脱した後の積層コアを、積層コアの形状及び位置保持するためのフレームに圧入する場合、離脱の際にコア部外周面に生じた変形が原因で、フレームとの組立性を損ない、またステータの真円度が悪化するという問題があった。
実施の形態1.
図1は、本発明の実施の形態1での積層コアの製造方法を適用した場合に、分割型ステータの積層コアを形成するコアシートの一例を示した平面図である。図2は、図1におけるコアシートを積層して形成される積層コアの斜視図であり、図3は、複数の積層コアからなるステータの正面図である。
嵌合凹部11c側の端部に離脱用凹部11fを設けてもよい。図1では、嵌合部界面に穴形状で打ち抜くことにより、嵌合凸部12a及び嵌合凹部11cの両側それぞれ三箇所に離脱用凹部12f、12g、12hと離脱用凹部11f、11g、11hを設けた例を示している。
実施の形態1の積層コアの製造方法においては、固定治具120により仮結束された積層コア110を絶縁樹脂13で一体成形することで、本結束する場合について示した。実施の形態2では、積層コアに絶縁樹脂の成形物を被せ、巻線することで本結束する場合について示す。
絶縁樹脂の成形物19、20は積層コア110の積層横方向を拘束し、巻線18は積層方向を拘束するとともに、横方向の結束もより強固にする。
実施の形態1の積層コアの製造方法においては、固定治具120を、本結束後、積層方向へのスライドのみで、バックヨーク部11aの嵌合凹部11cから取り外す場合について示した。実施の形態3では、固定治具の取り外し時に必要な加工力を低減させた後、スライドさせることで取り外す場合について示す。
11b ティース部
12 スクラップ部
12a 嵌合凸部
12b 把持用凸部
13 絶縁樹脂
18 巻線
19、20 絶縁樹脂の成形物
110 積層コア
110a バックヨーク部
110b ティース部
120 固定治具
120a 嵌合凸部
120b 把持用凸部
50、51 コアシート
Claims (9)
- ティース部およびこのティース部を円弧状の中央部で中心側に突設し、反対側にプッシュバックにより蝶型のスクラップ部の一方の羽形部を嵌合したバックヨーク部を備えたコアシートを鋼板から打ち抜く工程と、
このコアシートを複数枚積層し、隣接する前記スクラップ部の表裏面をそれぞれ固着する工程と、
前記積層したコアシートの前記ティース部及び前記バックヨーク部の積層間を固着した後、前記積層したスクラップ部を前記積層したバックヨーク部から取り外す工程とを含む積層コアの製造方法。 - 積層したスクラップ部は、積層したバックヨーク部の内径方向に移動させた後に、前記積層したバックヨーク部から取り外されることを特徴とする請求項1に記載の積層コアの製造方法。
- 積層したコアシートは、ティース部及びバックヨーク部を絶縁樹脂と一体成形することにより積層間を固着することを特徴とする請求項1又は請求項2に記載の積層コアの製造方法。
- 積層したコアシートは、ティース部及びバックヨーク部を絶縁樹脂の成形物で覆って嵌合することにより積層間を固着することを特徴とする請求項1又は請求項2に記載の積層コアの製造方法。
- 絶縁樹脂で積層間を固着したティース部は、巻線される際には、受取治具の他方の羽形部を把持して、積層したコアシートを固定することを特徴とする請求項3又は請求項4に記載の積層コアの製造方法。
- 積層したコアシートは、ティース部及びバックヨーク部を絶縁樹脂の成形物で覆った後、ティース部に巻線することにより積層間を固着することを特徴とする請求項1又は請求項2に記載の積層コアの製造方法。
- 巻線の際には、積層したスクラップ部の他方の羽形部を把持して、積層したコアシートを固定することを特徴とする請求項6に記載の積層コアの製造方法。
- ティース部およびこのティース部を円弧状の中央部で中心側に突設し、反対側にプッシュバックにより蝶型のスクラップ部の一方の羽形部を嵌合したバックヨーク部とからなるコアシートを鋼板から打ち抜き、このコアシートを複数枚積層し、隣接する前記スクラップ部の表裏面をそれぞれ固着し、前記積層したコアシートの前記ティース部及び前記バックヨーク部の積層間を固着した後、前記積層したバックヨーク部から取り外される前記積層されたスクラップ部からなる積層コアの製造治具。
- 積層したスクラップ部は、積層したバックヨーク部の内径方向に移動させた後に、前記積層したバックヨーク部から取り外されることを特徴とする請求項8に記載の積層コアの製造治具。
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