JP6868719B1 - Manufacturing method of laminated motor core and holding jig for manufacturing laminated motor core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably manufacture a laminated motor core in which a plurality of divided iron core pieces are adhered and laminated. SOLUTION: A method for manufacturing a laminated motor core 1 includes a step of punching a divided iron core piece 11, a step of forming a laminated body 101 of divided iron core pieces 11 held by a holding jig 21, and a step of being held by a holding jig 21. The laminated motor core 1 includes a step of impregnating the laminated body 101 with an adhesive, a step of curing the adhesive, and a step of removing the holding jig 21 from the laminated body 101, and the laminated motor cores 1 are spaced apart from each other in the circumferential direction. In the step of forming the laminated body 101 having the plurality of slots 4 provided thereby, the laminated body 101 is set to 2 in a state where the slot guide 32 is fitted into the corresponding slot 4 of the plurality of slots 4. The two plates 25 and 26 are sandwiched in the axial direction by the two plates 25 and 26, and then the two plates 25 and 26 are fixed by the fixtures 28 and 29. [Selection diagram] Fig. 3

Description

The present invention relates to a method for manufacturing a laminated motor core by adhesive lamination and a holding jig for manufacturing a laminated motor core.

Conventionally, it is known that an annular laminated motor core is used for a stator or the like for a motor. When the laminated motor core is composed of a laminate of an integral annular core piece (or thin plate), a large amount of scrap (that is, a non-punched region) is generated when the integral annular core piece is punched from the plate material. As a result, if an annular iron core piece integrated with the laminated motor core is used (that is, if the iron core pieces of each layer constituting the laminated motor core are punched together), there is a problem that the yield of the plate material is low.

On the other hand, a technique has been developed in which an annular iron core piece is divided into a plurality of pieces to form a divided iron core piece, and the divided iron core piece is used for a laminated motor core (see Patent Document 1). In this prior art, the annular core piece is formed by a plurality of fan-shaped (or arc-shaped) split core pieces connected in the circumferential direction. The plurality of divided iron core pieces are connected to each other in the stacking direction by the caulking portions formed on them. As a result, a small block composed of a plurality of divided iron core pieces is formed. The laminated motor core is composed of these plurality of small blocks laminated like a brick. This method using the divided iron core pieces has an advantage that the yield of the plate material is improved because the degree of freedom of the punching layout from the plate material is increased as compared with the one-piece (that is, non-divided) annular iron core piece.

On the other hand, when the plate thickness of the iron core pieces constituting the laminated motor core becomes thin (for example, when it becomes 0.15 mm or less), the required bonding strength between the divided iron core pieces to be laminated can be achieved by the caulking portion as described above. It gets harder. Therefore, a technique has been developed in which the laminated iron core pieces are bonded to each other by impregnation with an adhesive (see Patent Document 2). According to this conventional technique, when the individual steel plates (that is, the divided iron core pieces) that have been punched out are not separated from each other, when they are adhesively laminated, they are bonded and laminated by using a simple holding jig, a rubber band, or the like. It is said that it is preferable to temporarily fasten (or temporarily restrain).

Japanese Patent No. 5276303 Japanese Unexamined Patent Publication No. 2005-340691

When a laminated motor core is manufactured by adhesively laminating a plurality of divided iron core pieces, high accuracy is required for positioning (that is, temporary fixing) of each divided iron core piece before bonding. Otherwise, the quality (for example, shape and performance) of the laminated motor core may be adversely affected, and stable production of the laminated motor core may become difficult.

However, Patent Document 2 does not disclose a specific configuration of a holding jig for temporarily fixing a plurality of divided iron core pieces and a specific method for temporarily fixing each divided iron core piece.

The present invention has been devised in view of such problems of the prior art, and is a method for manufacturing a laminated motor core and a laminated motor core, which enables stable production of a laminated motor core in which a plurality of divided iron core pieces are adhered and laminated. The main purpose is to provide a holding jig for manufacturing a motor core.

A first aspect of the present invention is a method for manufacturing a laminated motor core in which a plurality of divided iron core pieces are adhered and laminated, that is, a punching step for punching the plurality of divided iron core pieces and a jig for holding the plurality of divided iron core pieces. By mounting on the holding jig, the laminated body forming step of forming the laminated body of the divided iron core pieces held by the holding jig and the laminated body being held by the holding jig and adhering to the laminated body. An adhesive step of impregnating the agent, an adhesive curing step of curing the adhesive impregnated in the laminate, and a holding jig removing step of removing the holding jig from the laminate obtained by curing the adhesive. , The laminated body has a plurality of slots provided at predetermined intervals in the circumferential direction, and the holding jig includes a first plate and a second plate, and the first plate and the first plate. It has a fixture for fixing the two plates and a plurality of slot guides extending between the first plate and the second plate, respectively. In the laminate forming step, the plurality of slot guides are present. The laminate is axially sandwiched by the first plate and the second plate in a state of being fitted into the corresponding slots of the slots, and then the first plate and the second plate are fixed. The configuration is fixed by the tool.

According to this first aspect, since the laminated body of the divided iron core pieces stably held by the holding jig is impregnated with the adhesive, the laminated motor core in which the plurality of divided iron core pieces are adhered and laminated is stably obtained. It becomes possible to manufacture.

A second aspect of the present invention further includes a segment forming step of forming a plurality of segments in which a predetermined number of divided iron core pieces are laminated between the punching step and the laminated body forming step, and the laminated body forming. In the process, the plurality of divided iron core pieces are mounted on the holding jig for each of the segments.

According to this second aspect, when forming the laminate held by the holding jig in the laminate forming step, a plurality of divided iron core pieces can be efficiently mounted on the holding jig.

In the third aspect of the present invention, in the segment forming step, the divided iron core pieces forming the segment are counted by weight measurement.

According to this third aspect, when forming a segment, a required number of divided iron core pieces can be easily obtained.

In the fourth aspect of the present invention, each of the plurality of segments has a plurality of slot forming portions forming a part of the plurality of slots, and in the segment forming step, among the plurality of slot forming portions. By fitting a further slot guide into at least one of the above, the divided iron core pieces constituting the segment are integrally held.

According to this fourth aspect, it is possible to easily integrally hold a segment in which a plurality of divided iron core pieces that are not bonded to each other are laminated. As a result, when forming the laminate held by the holding jig in the laminate forming step, each segment (that is, a plurality of divided iron core pieces held integrally) is efficiently mounted on the holding jig. can do.

In the fifth aspect of the present invention, in the laminate forming step, the plurality of slot guides are fitted into only a part of the plurality of slots, and in the segment forming step, the further slot guides are fitted. Is configured to be fitted into a slot forming portion other than the slot forming portion to which the slot guide can be fitted later in the laminated body forming step.

According to this fifth aspect, when the segment held by the additional slot guide is mounted on the holding jig, the additional slot guide is placed in the slot (or slot forming portion of the segment) of the laminate. It is possible to avoid interfering with the slot guide to be fitted. Therefore, each segment is mounted on the holding jig in a state of being stably held by a further slot guide.

In the sixth aspect of the present invention, in the punching step, a plurality of segments are formed by adhering and laminating the punched divided iron core pieces one by one, and in the laminated body forming step, the plurality of segments are formed. It is configured to be mounted on the holding jig.

According to this sixth aspect, in the laminate forming step, each segment is mounted on the holding jig in a state of being stably integrated by adhering the divided iron core pieces constituting the laminate.

In the seventh aspect of the present invention, in the laminate forming step, when the first plate and the second plate are fixed by the fixture, the laminate held by the holding jig presses the device. It is configured to be pressed in the axial direction with a predetermined force.

According to this seventh aspect, in the laminate forming step, by appropriately setting the pressing force of the laminate by the pressing device, the overall thickness of the laminate and the gap between the divided iron core pieces adjacent to each other in the axial direction are provided. Is adjusted appropriately.

In the eighth aspect of the present invention, the first plate is provided with a plurality of slot-corresponding holes into which the plurality of slot guides are fitted at positions corresponding to the plurality of slots.

According to this eighth aspect, the plurality of slot guides are easily held in place by being fitted into the slot corresponding holes of the first plate.

In the ninth aspect of the present invention, each of the plurality of slot guides has a length larger than the axial length of the laminated body, and the laminated body is held by the holding jig. Each of the plurality of slot guides is configured to protrude from the corresponding slot corresponding hole of the first plate.

According to this ninth side surface, when the slot guide becomes unnecessary after the split iron core piece is positioned, the slot guide portion protruding from the slot corresponding hole is gripped with a tool or the like, or a tool or the like is hooked on the portion. Can be stopped. As a result, it becomes easy to remove the slot guide that is no longer needed.

In a tenth aspect of the invention, the holding jig further comprises a pressing plate that is attached to the first plate and covers the protrusions of the plurality of slot guides from the plurality of slot corresponding holes. In the laminate forming step, the laminate is configured to be axially pressed via the pressing plate.

According to the tenth side surface, even when the plurality of slot guides protrude from the slot corresponding holes of the first plate, the laminated body can be easily pressed in the axial direction.

In the eleventh aspect of the present invention, in the laminate forming step, the first plate and the second plate are fixed by the fixture, and then the plurality of slot guides are pulled out from the slots. ..

According to this eleventh side surface, it is possible to prevent the slot guide from being bonded to the laminate or other components of the holding jig (first plate, second plate, etc.) in the subsequent bonding step.

In the twelfth aspect of the present invention, the holding jig further has a plurality of inner guide posts and a plurality of outer guide posts extending between the first plate and the second plate, respectively, and the laminated body. In the forming step, the laminated body is in a state where the plurality of inner guide posts are in contact with the inner peripheral surface of the laminated body and the plurality of outer guide posts are in contact with the outer peripheral surface of the laminated body. It is configured to be sandwiched in the axial direction by the first plate and the second plate.

According to this twelfth aspect, the radial movement of each split core piece was properly regulated by the inner and outer guideposts (ie, the radial position of the split core pieces was adjusted appropriately). In the state), the laminated body can be held by the holding jig.

In the thirteenth aspect of the present invention, in order to remove excess adhesive from the laminated body while the laminated body is held by the holding jig between the bonding step and the adhesive curing step. The configuration further includes a laminate cleaning step of cleaning the laminate.

According to this thirteenth aspect, excess adhesive can be removed while the laminated body is stably held by the holding jig.

In the fourteenth aspect of the present invention, the fixture comprises a plurality of bolts, and the first plate and the second plate each have a plurality of bolt holes through which the plurality of bolts can be inserted or fastened. In the laminate forming step, the plurality of bolts are inserted or fastened only to some of the bolt holes among the plurality of bolt holes, and in the laminate cleaning step, the plurality of bolts are inserted in the laminate forming step. The plurality of bolts are removed after the additional bolts are inserted or fastened to the bolt holes other than the bolt holes inserted or fastened.

According to this fourteenth aspect, the existing bolts are attached to other components of the holding jig (first plate, second plate, etc.) while the first plate and the second plate are stably fixed by additional bolts. On the other hand, it is possible to avoid being firmly adhered.

In the fifteenth aspect of the present invention, each of the first plate and the second plate is an annular body having a central opening, and the central opening is a central hole of the laminated body while holding the laminated body. The adhesive is a thermosetting type adhesive, and in the adhesive curing step, the laminate is housed in a heating furnace while being held by the holding jig, and the heating is performed. A hot air outlet for sending hot air is provided in the furnace, and the hot air sent from the hot air outlet is introduced into the central hole through the central opening of the first plate or the second plate. It is configured.

According to this fifteenth aspect, with a simple configuration, the entire laminate can be heated to a uniform temperature by the hot air sent from the hot air outlet.

A sixteenth aspect of the present invention is a holding jig for manufacturing a laminated motor core in which a plurality of divided iron core pieces are adhesively laminated, and the axis is a laminated body composed of the plurality of divided iron core pieces before being adhesively laminated. A plurality of slots extending between the first plate and the second plate sandwiched in the direction and the first plate and the second plate, respectively, and fitted into the corresponding slots among the plurality of slots formed in the laminate. The configuration is provided with the slot guide of No. 1 and a fixture for fixing the first plate and the second plate that sandwich the laminated body in the axial direction.

According to the 16th aspect, the laminated body of the divided iron core pieces stably held by the holding jig can be impregnated with the adhesive, so that the laminated motor core in which the plurality of divided iron core pieces are adhered and laminated can be formed. It becomes possible to manufacture stably.

In the seventeenth aspect of the present invention, there are further a plurality of inner guideposts and a plurality of outer guideposts extending between the first plate and the second plate, respectively, and the plurality of inner guideposts are said to have the same. The plurality of outer guide posts are in contact with the inner peripheral surface of the laminated body, and the plurality of outer guide posts are in contact with the outer peripheral surface of the laminated body.

According to the seventeenth side surface, the laminated body can be held by the holding jig in a state where the radial movement of each divided iron core piece is appropriately regulated by the inner guide post and the outer guide post.

As described above, according to the present invention, it is possible to stably manufacture a laminated motor core in which a plurality of divided iron core pieces are adhered and laminated.

Perspective view of the laminated motor core manufactured by the method for manufacturing the laminated motor core according to the first embodiment. An exploded perspective view of a main part of a holding jig for manufacturing a laminated motor core according to the first embodiment. The flow chart which shows the manufacturing process of the laminated motor core which concerns on 1st Embodiment A flow chart showing details of the laminate forming step (step ST104) shown in FIG. Explanatory drawing of the initial stage of the setting process (step ST201) of the split iron core piece with respect to the holding jig shown in FIG. Explanatory drawing of the initial stage of the setting process (step ST201) of the split iron core piece with respect to the holding jig shown in FIG. Explanatory drawing which shows the modification of the setting process (step ST201) of the split iron core piece with respect to the holding jig shown in FIG. Explanatory drawing at the time of completion of the setting process (step ST201) of the split iron core piece to the holding jig shown in FIG. Explanatory drawing of installation process (step ST202) of pressing plate with respect to holding jig shown in FIG. Explanatory drawing of the pressing step (step ST203) of the laminated body shown in FIG. Explanatory drawing of the bonding process (step ST105) of the laminated body shown in FIG. Explanatory drawing of cleaning step (step ST106) of laminated body shown in FIG. Explanatory drawing of cleaning step (step ST106) of laminated body shown in FIG. Explanatory drawing of the adhesive curing step (step ST107) shown in FIG. The flow chart which shows the manufacturing process of the laminated motor core which concerns on 2nd Embodiment

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First Embodiment)
FIG. 1 is a perspective view of a laminated motor core 1 manufactured by the method for manufacturing a laminated motor core according to the first embodiment. In this embodiment, the laminated motor core 1 will be described by taking a stator for a motor as an example.

As shown in FIG. 1, the laminated motor core 1 has a tubular shape, an annular yoke 2, and a plurality of teeth 3 formed so as to project inward from the yoke 2. The plurality of teeth 3 are arranged at predetermined intervals in the circumferential direction. Further, a slot 4 is formed between the teeth 3 adjacent to each other in the circumferential direction. Each slot 4 penetrates the laminated motor core 1 in the axial direction (vertical direction in FIG. 1). A substantially circular central hole 5 is formed in the center of the laminated motor core 1. The central hole 5 penetrates the laminated motor core 1 in the axial direction. A rotor for a motor (not shown) is inserted into the central hole 5.

The laminated motor core 1 is composed of a plurality of divided iron core pieces 11 that are bonded and laminated to each other. Each of the divided iron core pieces 11 has a substantially fan shape (or a substantially arc shape). In FIG. 1, one of the divided iron core pieces 11 is filled with a dot pattern for easy understanding. Further, a predetermined number (here, 6 pieces) of the divided iron core pieces 11 are connected to each other in the circumferential direction to form an annular iron core piece 12. The annular iron core piece 12 corresponds to one layer of the laminated motor core 1.

In the present embodiment, the divided iron core piece 11 corresponds to an annular iron core piece 12 divided into six at every 60 degrees along a radial dividing line passing through the center thereof. The plurality of divided iron core pieces 11 form block-shaped segments 13 for each predetermined number of pieces. In the laminated motor core 1, a plurality of stages (five stages in this embodiment) of annular blocks 14 in which a plurality of segments 13 are connected in the circumferential direction are stacked.

In the annular blocks 14 vertically adjacent to each other in the laminated motor core 1, the boundaries 13A of the respective segments 13 are located at different positions from each other. For example, in the annular block 14 located above (that is, the second step from the bottom) of the annular block 14 for the lowermost layer, the boundary 13A of each segment 13 is 30 degrees in the circumferential direction (that is, the divided iron core piece 11). It is in a position shifted by half of the division angle of.

The divided iron core pieces 11 (or each segment 13) adjacent to each other are connected by an adhesive. That is, an adhesive layer (not shown) made of an adhesive is formed at the circumferential boundary and the vertical (stacking direction) boundary (that is, fine gaps) of the divided iron core pieces 11 adjacent to each other. One end edge and the other end edge of the divided iron core piece 11 (that is, a portion forming a boundary with another divided iron core piece adjacent in the circumferential direction) form a linear shape extending in the radial direction.

The number and shape of the divided iron core pieces 11 constituting the laminated motor core 1 (or the annular iron core piece 12) are not limited to those disclosed in the present embodiment, and can be changed as appropriate. Further, for example, a convex portion may be provided on one end edge of the divided iron core piece 11 in the circumferential direction, and a concave portion having a shape that can be fitted to the convex portion may be provided on the other end edge. As a result, the convex portion and the concave portion are fitted between the divided iron core pieces 11 adjacent to each other in the circumferential direction, so that the movement of each divided iron core piece 11 in the radial direction is restricted.

FIG. 2 is an exploded perspective view of a main part of the holding jig 21 for manufacturing the laminated motor core 1 according to the first embodiment. FIG. 2 also shows a laminated body 101 of the divided iron core pieces 11 held by the holding jig 21. As will be described later, in the initial laminated body 101 held by the holding jig 21, at least a part of the divided iron core pieces 11 is not adhered.

The holding jig 21 includes an upper plate (first plate) 25, a lower plate (second plate) 26, a plurality of inner bolts (fixing tools) 28, a plurality of outer bolts (fixing tools) 29, and a plurality of inner guides. It has a post 30, a plurality of outer guide posts 31, and a plurality of slot guides 32.

The upper plate 25 is provided so as to sandwich the laminated body 101 together with the lower plate 26 in the axial direction (vertical direction in FIG. 2). The upper plate 25 is an annular body having a substantially annular shape in a plan view. The upper plate 25 has a central opening 35 provided so as to overlap the central hole 105 of the laminated body 101 (corresponding to the central hole 5 of the laminated motor core 1 shown in FIG. 1). The central opening 35 has a diameter smaller than that of the central hole 105 and penetrates the upper plate 25 in the axial direction.

The upper plate 25 has a flat lower surface that abuts on the upper surface of the laminated body 101. A plurality of inner bolt holes 41 are provided on the inner peripheral portion of the upper plate 25 at predetermined intervals in the circumferential direction. Each inner bolt hole 41 is a through hole that penetrates the upper plate 25 vertically. Each inner bolt 28 is inserted through the corresponding inner bolt hole 41. The head 61 of the inner bolt 28 abuts on the upper surface of the upper plate 25. In this embodiment, the number of inner bolts 28 is set to half of the inner bolt holes 41. Each inner bolt 28 is inserted into every other inner bolt hole 41.

Similarly, a plurality of outer bolt holes 42 are provided on the outer peripheral portion of the upper plate 25 at predetermined intervals in the circumferential direction. Each outer bolt hole 42 is a through hole that penetrates the upper plate 25 vertically. Each outer bolt 29 is inserted through the corresponding outer bolt hole 42. The number of outer bolts 29 is the same as that of inner bolts 28. In the present embodiment, the outer bolts 29 inserted into the outer bolt holes 42 are arranged at positions overlapping with the inner bolts 28 inserted into the inner bolt holes 41 in the radial direction.

Further, a plurality of inner guide holes 45 are provided in the inner peripheral portion of the upper plate 25 at predetermined intervals in the circumferential direction. Each inner guide hole 45 is arranged at an intermediate position between adjacent inner bolt holes 41 in the circumferential direction. Each inner guide hole 45 is a through hole that penetrates the upper plate 25 vertically. The upper end of each inner guide post 30 is fitted into the corresponding inner guide hole 45. In this embodiment, the number of inner guide posts 30 and inner guide holes 45 is twice as many as the inner bolts 28 (or outer bolts 29).

Similarly, a plurality of outer guide holes 46 are provided on the outer peripheral portion of the upper plate 25 at predetermined intervals in the circumferential direction. Each outer guide hole 46 is arranged at an intermediate position between adjacent outer bolt holes 42 in the circumferential direction. Each outer guide hole 46 is a through hole that penetrates the upper plate 25 vertically. The upper end of each outer guide post 31 is fitted into the corresponding outer guide hole 46. In this embodiment, the number of outer guide posts 31 is the same as the number of inner guide posts 30. Each outer guide post 31 is arranged at a position where it overlaps with each inner guide post 30 in the radial direction.

A plurality of slot-corresponding holes 49 are provided in the middle portion of the upper plate 25 in the radial direction at predetermined intervals in the circumferential direction. Each slot-corresponding hole 49 has substantially the same shape as each slot 4 of the laminated motor core 1, and is arranged at a position overlapping each slot 4 in the axial direction. The number of slot-corresponding holes 49 is the same as that of slot 4. Each slot-corresponding hole 49 is a through hole that penetrates the upper plate 25 vertically. The upper portion of each slot guide 32 is fitted into the corresponding slot corresponding hole 49. In the present embodiment, the number of slot guides 32 is set to be smaller than the number of slot corresponding holes 49. Each slot guide 32 is inserted into every other or every other slot corresponding hole 49.

The lower plate 26 has substantially the same structure as the upper plate 25. More specifically, the lower plate 26 has a central opening 36 corresponding to the central opening 35, the inner bolt hole 41, the outer bolt hole 42, the inner guide hole 45, the outer guide hole 46, and the slot corresponding hole 49 of the upper plate 25, respectively. , Inner bolt hole 51, outer bolt hole 52, inner guide hole 55, outer guide hole 56, slot corresponding hole 59. In the lower plate 26, the inner bolt hole 51 and the outer bolt hole 52 are formed as screw holes that match the screw portions 63 and 64 provided at the tips of the shaft portions of the inner bolt 28 and the outer bolt 29, respectively. The lower plate 26 has a flat upper surface that abuts on the lower surface of the laminated body 101.

Each inner bolt 28 is inserted through the inner bolt hole 41 of the upper plate 25, and its threaded portion is fixed (that is, screwed) to the inner bolt hole 51 of the lower plate 26. At this time, the head 61 of each inner bolt 28 is locked to the upper surface of the upper plate 25. Further, the shaft portion of each inner bolt 28 extends between the upper plate 25 and the lower plate 26.

Each outer bolt 29 has the same configuration as each inner bolt 28. Each outer bolt 29 is inserted through the outer bolt hole 42 of the upper plate 25, and its threaded portion is fixed to the outer bolt hole 52 of the lower plate 26. At this time, the head 62 of each outer bolt 29 is locked to the upper surface of the upper plate 25. Further, the shaft portion of each outer bolt 29 extends between the upper plate 25 and the lower plate 26 (see FIG. 13).

Each inner guide post 30 has a substantially columnar shape. The upper end and lower end of each inner guide post 30 are fitted into the inner guide hole 45 of the upper plate 25 and the inner guide hole 55 of the lower plate 26, respectively. As a result, each inner guide post 30 is supported by inner guide holes 45 and 55, respectively. At this time, the intermediate portion of each inner guide post 30 extends between the upper plate 25 and the lower plate 26.

Each outer guide post 31 has a columnar shape. Each outer guide post 31 has a larger outer diameter than each inner guide post 30 and has the same length as each inner guide post 30. The upper end and lower end of each outer guide post 31 are fitted into the outer guide hole 46 of the upper plate 25 and the outer guide hole 56 of the lower plate 26, respectively. As a result, each outer guide post 31 is supported by outer guide holes 46 and 56, respectively. At this time, the intermediate portion of each outer guide post 31 extends between the upper plate 25 and the lower plate 26 (see FIG. 13).

A screw hole 65 extending in the axial direction is provided at the upper end of each outer guide post 31. When each outer guide post 31 is removed from the upper plate 25 and the lower plate 26, a removal tool (not shown) is fitted into the screw hole 65.

Each slot guide 32 has a shape that fits slot 104 (corresponding to slot 4 of the laminated motor core 1) of the laminated body 101 in a horizontal cross section (that is, in a plan view). Each slot guide 32 may be able to regulate the movement of at least the slot 104 (extendingly, the split iron core piece 11 or the segment 13) in the circumferential direction while being inserted into the slot 104. More specifically, the two sides of the slot guide 32 in the circumferential direction abut each of the two sides of the slot 104 in the circumferential direction.

The upper and lower portions of each slot guide 32 are fitted into the slot corresponding holes 49 of the upper plate 25 and the slot corresponding holes 59 of the lower plate 26, respectively, with the intermediate portion thereof inserted into the slot 104 of the laminated body 101. At this time, the upper portion of each slot guide 32 is in a state of protruding from the upper surface of the upper plate 25 (see FIG. 8). Two locking holes 68 are provided in the upper portion of the slot guide 32 protruding from the upper surface of the upper plate 25. When each slot guide 32 is removed, a removal tool (not shown) is locked in each locking hole 68.

The configuration of the holding jig 21 described above can be changed as appropriate. For example, the upper plate 25 and the lower plate 26 do not have to be strictly plate-shaped, and a part thereof may function as a plate that sandwiches the laminated body 101 in the axial direction. The upper plate 25 and the lower plate 26 may be configured as block-shaped members. Further, for example, the size, shape, and number of the inner guide post 30, the outer guide post 31, and the slot guide 32 can be changed as needed.

FIG. 3 is a flow chart showing a manufacturing process of the laminated motor core 1 according to the first embodiment. FIG. 4 is a flow chart showing details of the forming step (step ST104) of the laminated body 101 shown in FIG. 5 and 6 are explanatory views of an initial stage of a step (step ST201) of setting the split iron core piece 11 on the holding jig 21 shown in FIG. 4, respectively. FIG. 7 is an explanatory view showing a modified example of the step of setting the split iron core piece (step ST201) with respect to the holding jig shown in FIG. FIG. 8 is an explanatory view at the time of completion of the setting step (step ST201) of the split iron core piece 11 with respect to the holding jig shown in FIG. FIG. 9 is an explanatory view of an installation step (step ST202) of the pressing plate 75 on the holding jig shown in FIG. FIG. 10 is an explanatory view of the pressing step (step ST203) of the laminated body shown in FIG. FIG. 11 is an explanatory view of the bonding step (step ST105) of the laminated body 101 shown in FIG. 12 and 13 are explanatory views of the cleaning step (step ST106) of the laminated body 101 shown in FIG. 3, respectively. FIG. 14 is an explanatory view of the adhesive curing step (step ST107) shown in FIG.

In the manufacturing process of the laminated motor core 1, first, a step of punching the divided iron core piece 11 (hereinafter, referred to as “punching step”) is carried out (ST101). In the punching step, a hoop material (or coil material) made of an electromagnetic steel plate is pressed using a known progressive die. As a result, the plurality of divided iron core pieces 11 are formed in a state where they are not adhered to each other (that is, in a disjointed state). The plate thickness of the divided iron core piece 11 is not particularly limited, but can be set to be relatively thin (for example, 0.1 mm).

In the punching step, the split iron core piece 11 may be formed by using not only the progressive die but also other known devices and methods.

Next, a step of cleaning the plurality of divided iron core pieces 11 obtained in the punching step (hereinafter, referred to as "iron core piece cleaning step") is carried out (ST102). In the iron core piece cleaning step, degreasing cleaning of each divided iron core piece 11 is performed using a known solvent (for example, acetone). More specifically, the divided iron core piece 11 is immersed in the solvent in the cleaning container, and the divided iron core piece 11 is vibrated by ultrasonic waves in a state where the inside of the cleaning container is evacuated. As a result, deposits (press working oil or the like used in the punching step) adhering to the divided iron core piece 11 are removed.

In the iron core piece cleaning step, the divided iron core piece 11 may be cleaned by using another known method. Further, if the deposit does not affect the adhesion between the divided iron core pieces 11 (see ST105), the iron core piece cleaning step may be omitted.

Next, a step of forming a segment 13 composed of a predetermined number of divided iron core pieces 11 (hereinafter, referred to as a “segment forming step”) is carried out (ST103). In the segment forming step, the divided iron core pieces 11 forming the segment 13 are counted by weight measurement. That is, when the collected divided iron core pieces 11 are within a predetermined weight range, it is considered that the group of divided iron core pieces 11 satisfies the required number of sheets. As a result, a set of a plurality of divided iron core pieces 11 constituting each segment 13 can be obtained. In the present embodiment, the plurality of divided iron core pieces 11 constituting the segment 13 are not adhered to each other. Further, the plurality of divided iron core pieces 11 constituting the segment 13 do not necessarily have to be in a laminated state.

When the divided iron core pieces 11 are not laminated for each segment in the later-implemented step of forming the laminated body 101 (step ST104) (for example, when the divided iron core pieces 11 are laminated one by one), the segment forming step is performed. It may be omitted. In that case, instead of the segment forming step, a step of preparing the number of divided iron core pieces 11 required for forming the laminated body 101 is carried out.

Next, a step of forming a laminated body 101 of the divided iron core pieces 11 held by the holding jig 21 by mounting the plurality of divided iron core pieces 11 on the holding jig 21 (hereinafter, referred to as a “laminated body forming step”). ) Is carried out (ST104).

More specifically, as shown in FIG. 4, first, in the laminate forming step, each divided iron core piece 11 is set on the holding jig 21 (ST201).

In step ST201, as shown in FIG. 5, in the holding jig 21, first, the lower end portion of the slot guide 32 is fitted into a predetermined slot corresponding hole 59 of the lower plate 26. In this case, it is not necessary to fit the slot guide 32 into all the slot corresponding holes 59. At least in the holding jig 21, the slot guide 32 may regulate the movement of each divided iron core piece 11 (or segment 13) in the circumferential direction. As a result, the positions of the divided iron core pieces 11 (or segments 13) in the circumferential direction are fixed.

Each of the divided iron core pieces 11 is sequentially mounted from above the slot guide 32 on the holding jig 21 in such a state, so that the divided iron core pieces 11 are laminated at a predetermined position. At this time, the corresponding slot guides 32 are sequentially inserted into a part of each hole (the hole that later forms the slot 4) of the divided iron core piece 11. The laminated split iron core pieces 11 form a block-shaped segment 13 in the laminated body 101.

In FIG. 5, the inner guide post 30 and the outer guide post 31 are not shown in order to more clearly show the configuration of the slot guide 32 in the holding jig 21. Actually, in the holding jig 21, in addition to the slot guide 32 described above, the lower end portion of the inner guide post 30 is fitted into the inner guide hole 55 of the lower plate 26, and the lower end portion of the outer guide post 31 is fitted. Is fitted into the outer guide hole 56 of the lower plate 26.

More specifically, as shown in FIG. 6, when the split iron core piece 11 is mounted on the holding jig 21, its downward movement is guided by the corresponding inner guide post 30 and outer guide post 31. .. At this time, the inner peripheral surface 11a and the outer peripheral surface 11b of the divided iron core piece 11 come into contact with (or are in sliding contact with) the inner guide post 30 and the outer guide post 31, respectively. As a result, the radial movement of the split iron core piece 11 (or segment 13) is restricted.

Note that FIG. 6 shows only two sets of inner guide posts 30 and outer guide posts 31 that guide the movement of the illustrated split iron core piece 11. Further, contrary to FIG. 5, in FIG. 6, the slot guide 32 is omitted in order to more clearly show the configurations of the inner guide post 30 and the outer guide post 31 in the holding jig 21.

An annular release paper 70 is interposed between the bottom surface of the laminated body 101 (that is, the divided iron core piece 11 in the lowermost layer) and the upper surface of the lower plate 26. A known material can be used for the paper pattern 70. Further, the paper pattern 70 has substantially the same shape as the laminated body 101 in a plan view. Although not shown, a paper pattern similar to the paper pattern 70 is interposed between the upper surface of the laminated body 101 (that is, the split iron core piece 11 of the uppermost layer) and the lower surface of the upper plate 25. This facilitates the removal of the holding jig 21 from the laminated body 101 (that is, the laminated motor core 1) in the step of removing the holding jig 21 (step ST108), which is carried out later.

In FIG. 5 described above, an example is shown in which the divided iron core pieces 11 are mounted on the holding jig 21 one by one. On the other hand, as shown in FIG. 7, the divided iron core piece 11 may be mounted on the holding jig 21 as a segment 13 (that is, as a group), for example. In that case, a further slot guide 132 having the same configuration as the slot guide 32 is fitted into a part of the slot forming portion (corresponding to the slot 4 of the laminated motor core 1) of the segment 13, so that the divided iron core piece 11 in the segment 13 is fitted. (That is, the split iron core pieces 11 constituting the segment 13 are integrally held).

In the segment 13, the slot forming portion into which the further slot guide 132 is fitted (see reference numerals 204C and 204G in FIG. 7) is a slot guide (reference numeral in FIG. 7) when the segment 13 is mounted on the holding jig 21. It is different from the slot forming portions (reference numerals 204A, 204D, 204F, 204I in FIG. 7) into which the 32A, 32D, 32F, 32I) are fitted. As a result, when the segment 13 held by the further slot guide 132 is mounted on the holding jig 21, the slot guide 132 interferes with the slot guide 32 fitted in the slot forming portion of the segment 13. It can be avoided.

Finally, when all the divided iron core pieces 11 are mounted on the holding jig 21 (that is, the laminated body 101 is formed on the lower plate 26), the upper plate 25 is placed on the formed laminated body 101. Is attached. As a result, as shown in FIG. 8, the laminated body 101 is in a state of being sandwiched between the upper plate 25 and the lower plate 26 (hereinafter, referred to as “temporarily held state”), and step ST201 is completed.

With reference to FIG. 4 again, next, in the laminate forming step, the pressing plate 75 is installed on the upper plate 25 (ST202).

More specifically, as shown in FIG. 9, by installing the pressing plate 75 on the upper plate 25, the protruding portion (upper end portion) of each slot guide 32 from the slot corresponding hole 49 of the upper plate 25 is formed. Covered by a pressing plate 75.

The pressing plate 75 has a substantially annular shape. The pressing plate 75 can be arranged between the plurality of inner guide posts 30 and the plurality of outer guide posts 31 arranged in the circumferential direction in the upper plate 25, respectively. Further, the pressing plate 75 is provided with a plurality of slot guide accommodating holes 76 for accommodating the upper end portion of each slot guide 32. Each slot guide accommodating hole 76 has a size and shape capable of accommodating at least the upper end of each slot guide 32. Further, each slot guide accommodating hole 76 is arranged at a position where it vertically overlaps with each slot 104 of the laminated body 101. The pressing plate 75 constitutes a part of the holding jig 21.

With reference to FIG. 4 again, in the laminate forming step, the laminate 101 is pressed in the axial direction in order to appropriately adjust the laminated state of each divided iron core piece 11 (ST203).

More specifically, as shown in FIG. 10, the laminated body 101 temporarily held by the holding jig 21 is pressed by the plurality of pressing rods 80 in the pressing device 78 while being arranged on the mounting table 79. Will be done. At this time, the plurality of pressing rods 80 are driven downward (that is, toward the mounting table 79) with a predetermined force in a state where the lower ends thereof are in contact with the flat upper surface of the pressing plate 75. As a result, the laminated body 101 is pressed while being sandwiched between the upper plate 25 and the lower plate 26, and the overall thickness of the laminated body 101 and the gap between the divided iron core pieces 11 adjacent to each other in the axial direction are appropriately adjusted. Will be done. The plurality of pressing rods 80 are arranged at equal intervals with each other in the circumferential direction.

With reference to FIG. 4 again, the upper plate 25 and the lower plate 26 are then fixed in the laminate forming step (ST204).

In step ST204, the inner bolt 28 and the outer bolt 29 (FIG. 10) temporarily inserted into the inner bolt holes 41, 51 and the outer bolt holes 42, 52 while the laminated body 101 is pressed by the pressing device 78 described above. See) tightening is performed. As a result, the upper plate 25 and the lower plate 26 are fixed in a state where the overall thickness of the laminated body 101 and the gap between the divided iron core pieces 11 are appropriately adjusted. At this time, the tightening torques of the inner bolt 28 and the outer bolt 29 are not excessively tightened (that is, a force larger than the pressing force by the pressing device 78 described above does not act on the laminated body 101). Is adjusted.

After that, the pressing plate 75 is removed, and all the slot guides 32 are removed. At this time, the slot guide 32 is pulled upward from the upper plate 25 side. As a result, the forming step (ST104) of the laminated body 101 is completed, and the laminated body 101 is held by the holding jig 21. The slot guide 32 may be removed from both the inner bolt 28 and the outer bolt 29 in the cleaning step (ST106) of the laminated body 101 described later.

With reference to FIG. 3 again, next, in the manufacturing process of the laminated motor core 1, a step of impregnating the laminated body 101 held by the holding jig 21 with an adhesive (hereinafter, referred to as “adhesive step”) is carried out. (ST105).

More specifically, as shown in FIG. 11, in the bonding step, the laminated body 101 held by the holding jig 21 is immersed in the liquid adhesive 86 filled in the bonding container 85. In that state, the adhesive container 85 is set in the vacuum device 87, and the inside of the vacuum device 87 is evacuated by a vacuum pump (not shown). As a result, the adhesive impregnates the laminate 101. That is, in the laminated body 101, the adhesive 86 permeates the boundary in the circumferential direction and the boundary in the vertical direction (lamination direction) (that is, fine gaps) of the divided iron core pieces 11 adjacent to each other. As the adhesive 86, a known thermosetting adhesive can be used.

With reference to FIG. 3 again, next, in the manufacturing process of the laminated motor core 1, a step of cleaning the laminated body 101 in order to remove excess adhesive from the laminated body 101 (hereinafter, referred to as “laminate cleaning step”) is performed. It is carried out (ST106).

More specifically, as shown in FIG. 12, in the laminate cleaning step, the laminate 101 held by the holding jig 21 is immersed in the liquid cleaning agent 92 filled in the cleaning container 91. The immersion of the laminate 101 in the cleaning agent 92 can be performed a plurality of times within a predetermined immersion time while checking the degree to which the adhesive has been removed. At this time, an appropriate immersion time and number of immersions are set so that the adhesive impregnated in the laminate 101 is not excessively removed. As the cleaning agent, for example, acetone is used.

Further, in the laminate cleaning step, the inner bolt 28 and the outer bolt 29 are removed (further replaced with bolts 128 and 129) by temporarily taking out the laminate 101 from the cleaning container 91 after immersing the laminate 101 in the cleaning agent 92. Will be done. More specifically, as shown in FIG. 13, for the remaining inner bolt holes 41, 51 through which the inner bolts 28 have not been inserted or fastened in the above-mentioned laminate forming step, the same number of additional bolts 128 as those inner bolts 28 Is inserted or fastened. Similarly, as many additional bolts 129 as those outer bolts 29 are inserted or fastened to the remaining outer bolt holes 42, 52 where the outer bolts 29 are not inserted or fastened. As a result, the additional bolts 128 and 129 are inserted or fastened to the inner bolt holes 41 and 51 and the outer bolt holes 42 and 52 after cleaning, and are not affected by the adhesive. On the other hand, it is possible to prevent the inner bolt 28 and the outer bolt 29 from being firmly adhered to the upper plate 25 and the lower plate 26 of the holding jig 21 due to the curing of the adhesive.

In this case, in order to stably hold the laminated body 101, the attached inner bolts 28 and outer bolts 29 are removed after all the additional bolts 128 and 129 are attached. Further, the tightening torques of the bolts 128 and 129 are adjusted so as not to be excessively tightened.

With reference to FIG. 3 again, next, in the manufacturing process of the laminated motor core 1, a step of curing the adhesive impregnated in the laminated body 101 (hereinafter, referred to as “adhesive curing step”) is carried out (ST107). ).

More specifically, as shown in FIG. 14, in the adhesive curing step, the laminate 101 held by the holding jig 21 is heated in the furnace chamber of the heating furnace 95. At this time, the bottom wall 96 of the furnace chamber on which the laminated body 101 is placed is provided with a hot air outlet 96A for sending hot air for heating. At this time, the laminated body 101 is arranged in the furnace chamber so that the central opening 36 of the lower plate 26 of the holding jig 21 for holding the laminated body 101 overlaps with the hot air outlet 96A.

As a result, the hot air sent from the hot air outlet 96A is introduced into the holding jig 21 from the central opening 36 of the lower plate 26, and further passes through the central hole 105 of the laminated body 101 and the central opening 35 of the upper plate 25. Exit upwards. After that, the hot air wraps around the outer peripheral surface side of the laminated body 101 and is discharged to the outside of the furnace from the exhaust port 97A provided in the lower part of the side wall 97 of the furnace chamber. With such a configuration, in the heating furnace 95, the entire laminated body 101 can be heated to a uniform temperature by the hot air sent from the hot air outlet 96A. As the heating furnace 95, for example, a known electric furnace can be used.

With reference to FIG. 3 again, in the manufacturing process of the laminated motor core 1, the holding jig 21 is removed (holding jig removing step) after the laminated body 101 is cooled after the adhesive curing step. It is carried out (ST108). As a result, the laminated motor core 1 in which the divided iron core pieces 11 are adhered and laminated is completed. The laminated body 101 in step ST108 is preferably cooled at room temperature in order to avoid rapid cooling.

(Second Embodiment)
FIG. 15 is a flow chart showing a manufacturing process of the laminated motor core according to the second embodiment. The second embodiment is the same as the first embodiment described above, except for the matters particularly mentioned below.

In the punching / bonding step of the split core piece 11 in step ST301 shown in FIG. 15, in addition to the punching of the split core piece 11 in the punching step (step ST101 in FIG. 3) of the first embodiment, the punched split core piece 11 Are bonded and laminated one by one in a predetermined number. This punching / bonding step is performed using, for example, a known progressive die provided with an adhesive coating device. As a result, a group (that is, block-shaped) divided iron core pieces 11 in a state of being adhered to each other are formed. This group of divided iron core pieces 11 corresponds to the segment 13 in the above-described first embodiment.

Next, a step of cleaning the segment 13 obtained in the punching / bonding step (hereinafter, referred to as “segment cleaning step”) is carried out (ST302). The segment cleaning step can be carried out in the same manner as the iron core piece cleaning step (step ST102 in FIG. 3) of the first embodiment.

Next, a step of forming a laminated body 101 of the divided iron core pieces 11 held by the holding jig 21 by mounting the washed segment 13 on the holding jig 21 (hereinafter, referred to as a “laminated body forming step”. ) Is carried out (ST303). In the laminate forming step according to the second embodiment, the segment 13 is used instead of one divided iron core piece 11 in the laminate forming step of the first embodiment (step ST104 in FIG. 3 and ST201 in FIG. 4). It is set with respect to the holding jig 21.

Subsequent steps ST304-ST307 are carried out in the same manner as ST105-ST108 shown in FIG. 3 according to the first embodiment, respectively. In ST304, the segments 13 are adhered to each other by an adhesive.

Although the present invention has been described above based on specific embodiments, these embodiments are merely examples, and the present invention is not limited to these embodiments. For example, the laminated motor core 1 according to the present invention can be used not only for a motor but also for rotary electricity of a generator or the like having a similar configuration. It should be noted that not all of the components of the method for manufacturing the laminated motor core and the holding jig for manufacturing the laminated motor core according to the present invention shown in the above embodiment are necessarily indispensable, and at least as long as they do not deviate from the scope of the present invention. It is possible to select as appropriate.

1: Laminated motor core 2: Yoke 3: Teeth 4: Slot 5: Central hole 11: Divided iron core piece 11a: Inner peripheral surface 11b: Outer peripheral surface 12: Iron core piece 13: Segment 13A: Boundary 14: Circular block 21: Holding jig 25: Upper plate (first plate)
26: Lower plate (second plate)
28: Inner bolt (fixing tool)
29: Outer bolt (fixing tool)
30: Inner guide post 31: Outer guide post 32: Slot guide 35, 36: Central opening 41, 51: Inner bolt holes 42, 52: Outer bolt holes 45, 55: Inner guide holes 46, 56: Outer guide holes 49, 59: Slot corresponding holes 61, 62: Head 63, 64: Threaded portion 65: Screw hole 68: Locking hole 70: Release paper 75: Pressing plate 76: Slot guide accommodating hole 78: Pressing device 79: Mounting base 80 : Pressing rod 85: Adhesive container 86: Adhesive 87: Vacuum device 91: Cleaning container 92: Cleaning agent 95: Heating furnace 96: Bottom wall 96A: Hot air outlet 97: Side wall 97A: Exhaust port 101: Laminated body 104 : Slot 105: Central hole 128, 129: Additional bolt 132: Additional slot guide

Claims (17)

It is a method for manufacturing a laminated motor core in which a plurality of divided iron core pieces forming an annular iron core piece by being connected to each other in the circumferential direction are bonded and laminated.
The punching process for punching the plurality of divided iron core pieces and
A laminate forming step of forming a laminate of the divided iron core pieces held by the holding jig by mounting the plurality of divided iron core pieces on the holding jig.
An adhesive step of impregnating the laminate with an adhesive while the laminate is held by the holding jig.
An adhesive curing step of curing the adhesive impregnated in the laminate, and
Including a holding jig removing step of removing the holding jig from the laminated body obtained by curing the adhesive.
The divided iron core pieces have a plurality of slots provided at predetermined intervals in the circumferential direction.
The holding jig has a plate-like shape extending between the first plate and the second plate, the fixture for fixing the first plate and the second plate, and the first plate and the second plate, respectively. With multiple slot guides,
In the laminate forming step performed before the bonding step and the adhesive curing step,
Wherein the plurality of slots guides by Rukoto fitted into corresponding one of said slots so as to respectively directly abut the two sides in the circumferential direction of the slot of its two sides a plurality of slots, said first plate and The position of the divided iron core piece in the circumferential direction with respect to the second plate is fixed, and in this state, the laminate is axially sandwiched by the first plate and the second plate, and then the first plate and the said. A method for manufacturing a laminated motor core in which a second plate is fixed by the fixture. Between the punching step and the laminated body forming step, a segment forming step of forming a plurality of segments in which the divided iron core pieces are laminated by a predetermined number of pieces is further included.
The method for manufacturing a laminated motor core according to claim 1, wherein in the laminated body forming step, the plurality of divided iron core pieces are mounted on the holding jig for each of the segments. The method for manufacturing a laminated motor core according to claim 2, wherein in the segment forming step, counting of the divided iron core pieces forming the segment is performed by weight measurement. Each of the plurality of segments has a plurality of slot forming portions forming a part of the plurality of slots.
Claim 2 or claim that in the segment forming step, the divided iron core pieces constituting the segment are integrally held by fitting a further slot guide into at least one of the plurality of slot forming portions. 3. The method for manufacturing a laminated motor core according to 3. In the laminate forming step, the plurality of slot guides are fitted into only a part of the plurality of slots.
The method for manufacturing a laminated motor core according to claim 4, wherein in the segment forming step, the further slot guide is fitted into a slot forming portion other than the slot forming portion into which the slot guide can be fitted later in the laminated body forming step. .. In the punching step, a plurality of segments are formed by adhering and laminating a predetermined number of the punched divided iron core pieces.
The method for manufacturing a laminated motor core according to claim 1, wherein in the laminated body forming step, the plurality of segments are mounted on the holding jig. In the laminate forming step, when the first plate and the second plate are fixed by the fixture, the laminate held by the holding jig is pressed axially by a pressing device with a predetermined force. The method for manufacturing a laminated motor core according to any one of claims 1 to 6. The stacking according to any one of claims 1 to 7, wherein the first plate is provided with a plurality of slot-corresponding holes into which the plurality of slot guides are fitted at positions corresponding to the plurality of slots. How to manufacture a motor core. Each of the plurality of slot guides has a length larger than the axial length of the laminated body.
The method for manufacturing a laminated motor core according to claim 8, wherein each of the plurality of slot guides projects from the corresponding slot corresponding hole of the first plate while the laminated body is held by the holding jig. The holding jig further includes a pressing plate that is attached to the first plate and covers the protrusions of the plurality of slot guides from the plurality of slot corresponding holes.
The method for manufacturing a laminated motor core according to claim 9, wherein in the laminated body forming step, the laminated body is pressed in the axial direction via the pressing plate. The method according to any one of claims 1 to 10, wherein in the laminate forming step, after the first plate and the second plate are fixed by the fixture, the plurality of slot guides are pulled out from the slots. Manufacturing method of laminated motor core. The holding jig further includes a plurality of inner guide posts and a plurality of outer guide posts extending between the first plate and the second plate, respectively.
In the laminate forming step, the plurality of inner guide posts are in contact with the inner peripheral surface of the laminate, and the plurality of outer guide posts are in contact with the outer peripheral surface of the laminate. The method for manufacturing a laminated motor core according to any one of claims 1 to 11, wherein the laminated body is axially sandwiched by the first plate and the second plate. A laminate cleaning step of cleaning the laminate in order to remove excess adhesive from the laminate while the laminate is held by the holding jig between the bonding step and the adhesive curing step. The method for manufacturing a laminated motor core according to any one of claims 1 to 12, further comprising. The fixture comprises a plurality of bolts.
The first plate and the second plate each have a plurality of bolt holes through which the plurality of bolts can be inserted or fastened.
In the laminate forming step, the plurality of bolts are inserted or fastened only to some of the bolt holes among the plurality of bolt holes.
In the laminate cleaning step, after further bolts are inserted or fastened to bolt holes other than the bolt holes into which the plurality of bolts are inserted or fastened in the laminate forming step, the plurality of bolts are removed. The method for manufacturing a laminated motor core according to claim 13. Each of the first plate and the second plate is an annular body having a central opening.
The central opening is provided so as to overlap the central hole of the laminated body while holding the laminated body.
The adhesive comprises a thermosetting adhesive and is composed of a thermosetting adhesive.
In the adhesive curing step, the laminate is housed in a heating furnace while being held by the holding jig.
A hot air outlet for sending hot air is provided in the heating furnace.
The laminated motor core according to any one of claims 1 to 14, wherein the hot air sent from the hot air outlet is introduced into the central hole through the central opening of the first plate or the second plate. Production method. It is a holding jig for manufacturing a laminated motor core in which a plurality of divided iron core pieces forming an annular iron core piece by being connected to each other in the circumferential direction are bonded and laminated.
A first plate and a second plate that axially sandwich a laminated body composed of the plurality of divided iron core pieces before being adhesively laminated.
Two in the circumferential direction of the slot, which extend between the first plate and the second plate, respectively, and are fitted into the corresponding slots of the plurality of slots formed in the divided iron core pieces. A plurality of plate-shaped slot guides having side surfaces that directly contact the side surfaces and fixing the positions of the divided iron core pieces in the circumferential direction with respect to the first plate and the second plate.
A holding jig for manufacturing a laminated motor core, comprising: the first plate sandwiching the laminated body in the axial direction and a fixture for fixing the second plate. Further having a plurality of inner guideposts and a plurality of outer guideposts extending between the first plate and the second plate, respectively.
The plurality of inner guide posts are in contact with the inner peripheral surface of the laminated body,
The holding jig for manufacturing a laminated motor core according to claim 16, wherein the plurality of outer guide posts abut on the outer peripheral surface of the laminated body.

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