JP3899364B1 - Stator core manufacturing jig and stator core manufacturing method using the same - Google Patents

Abstract

A stator core manufacturing jig that can improve workability, reduce manufacturing time, and improve the accuracy of roundness and straightness of a manufactured stator core. And a method of manufacturing a stator core using the same.
A cam member 16 rotatably mounted on a base member 15, a product guide member 19 for fixing a plurality of divided cores 13 mounted on the cam member 16 in the circumferential direction, and each product guide. A guide plate 20 that is arranged between the members 19 and that allows the divided cores 13 to be placed and movable in the radial direction, and the expansion and contraction of the product guide members 19 that are synchronously moved along the radial direction by the rotation of the cam member 16. And a mechanism 32. The manufacturing method of the stator core includes a preparation step of placing a plurality of divided cores 13 punched and laminated in the shape of the stator core 14 on the manufacturing jig 10 while maintaining the shape, And an assembling process for processing in a state of being placed on the manufacturing jig 10.
[Selection] Figure 1

Description

The present invention relates to a stator core manufacturing jig formed by connecting a plurality of divided cores in the circumferential direction, and a stator core manufacturing method using the same.

2. Description of the Related Art Conventionally, as a stator core, a structure in which a plurality of divided cores that are substantially T-shaped in plan view are combined in an annular shape is known. Each of the divided cores has an arc-shaped yoke portion and a magnetic pole portion extending radially inward from the yoke portion.
As a method of assembling a stator core composed of such split cores, for example, in Patent Documents 1 and 2, a plurality of manufacturing jigs to be mounted while holding each split core is radially provided on a base. A method is disclosed in which a stator core is manufactured by arranging and simultaneously moving the manufacturing jigs radially inward. As a result, the engaging portion provided on one side in the circumferential direction of the yoke portion of each divided core is fitted into the concave portion provided on the other circumferential side of the yoke portion of the adjacent divided core so that each divided core is Can be integrated with high precision.

In Patent Document 3, a plurality of divided cores are arranged at intervals in the circumferential direction, and windings are applied to the magnetic pole portions in a state where the gap between adjacent magnetic pole portions is wider than the state of the stator core. Thereafter, a method of manufacturing a stator core by moving each divided core radially inward is disclosed. Thereby, while being able to perform winding with respect to each division | segmentation core easily, the space factor of a coil | winding can be improved.
In addition, as a method of moving each divided core along the radial direction, for example, a diameter expansion / reduction means disclosed in Patent Document 4 is known.
Further, when a plurality of divided core pieces are punched from a strip material with a die and are laminated to form a divided core, as shown in FIG. The material is taken along the longitudinal direction of the belt-like material.

Japanese Patent Laid-Open No. 9-233773 JP 2000-41364 A JP 2001-161048 A JP 2004-208358 A JP 2005-318863 A

However, in the method for manufacturing a stator core disclosed in Patent Documents 1 to 4, a plurality of split cores formed by a mold are individually mounted on a manufacturing jig, and the manufacturing jig is placed on a base. Since it has to be arranged, workability is poor, and labor and time are required. In particular, when the stator core is composed of split cores, there is a problem that in the assembly process of winding or welding, it is difficult to easily attach or remove each split core from the manufacturing jig. In addition, there is a similar problem in conveyance between each process. For this reason, the work man-hours increase as a result, workability deteriorates, and there is a problem that the manufacturing time cannot be shortened.
Further, as shown in FIG. 13 (a) of Patent Document 5, a stator core that is manufactured by integrating a plurality of divided core pieces arranged in the longitudinal direction of a strip-shaped material and collecting the divided cores laminated together, For example, the accuracy such as roundness or straightness is inferior compared with a stator core manufactured by punching and integrating each divided core piece in the shape of a stator core. Further, when a plurality of divided core pieces are arranged in the longitudinal direction of the strip material, the core pieces constituting the rotor core are punched out from another strip material as shown in FIG. 13B of Patent Document 5. There is a need. For this reason, the rotor core must be manufactured using a mold that is separate from the mold that manufactures the stator core. Therefore, the motor that manufactures the stator core from the split core has a significant manufacturing cost. There was an increase in inconvenience.

The present invention has been made in view of such circumstances, and can improve workability, reduce manufacturing time, and improve accuracy of roundness and straightness of the manufactured stator core. It is an object of the present invention to provide a stator core manufacturing jig that can be used, and a stator core manufacturing method using the same.

A stator core manufacturing jig according to the first invention that meets the above-described object is a circumferentially connecting plurality of divided cores each having an arcuate yoke portion and a magnetic pole portion extending radially inward from the yoke portion. A stator core manufacturing jig to be integrated,
A base member;
A cam member rotatably mounted on the base member;
A product guide member that is mounted on the cam member and fixes the plurality of divided cores arranged at regular intervals in the circumferential direction; and
A guide plate that is disposed between the adjacent product guide members, places the split cores, and allows the split cores fixed to the product guide members to move in a radial direction;
Wherein the cam member is provided on each product guide member, by rotating the cam member, possess a scaling mechanism for synchronously moving said each product guide member along a radial direction,
In addition, the expansion / contraction mechanism includes a guide groove formed obliquely with respect to a radial direction at a lower end portion of each product guide member, and a plurality of slides provided in the circumferential direction of the cam member and respectively moving in the guide grooves. And by rotating the annular cam member on the base member, the sliding members move in the guide grooves, and the product guide members are moved radially outward. or radially inwardly Before moving synchronously.

In the stator core manufacturing jig according to the first aspect of the present invention, it is preferable that the product guide member includes a locking portion that fits into a recess formed on the outer periphery of the yoke portion of the split core.
In the stator core manufacturing jig according to the first aspect of the present invention, it is preferable that the locking portion includes a mechanism that is divided in the width direction and can be widened and shrunk.
In the stator core manufacturing jig according to the first invention, it is preferable that the product guide member has a pin member that is fitted into a hole formed on the lower side of the split core.
It is preferable that the stator core manufacturing jig according to the first invention is annular and penetrates in the vertical direction.

A method for manufacturing a stator core according to the second invention that meets the above-described object is to connect a plurality of split cores having an arcuate yoke portion and a magnetic pole portion extending radially inward from the yoke portion in the circumferential direction, In the method of manufacturing a stator core that integrates by providing a gap between the magnetic pole portions of the adjacent split cores,
A plurality of the divided cores that are annularly punched and laminated into the shape of the stator core by a mold, and a preparation step of discharging the mold from the mold in a state of maintaining the shape;
An assembly step of processing each divided core in a state where the respective divided cores arranged in the shape of the stator core are placed on the manufacturing jig after the manufacturing jig is conveyed.

In the method for manufacturing a stator core according to the second invention, the assembling step includes a winding step, and the divided cores are arranged in a winding device in a state of being placed on the manufacturing jig, and the divided cores are arranged. Are moved outward in the radial direction, the adjacent divided cores are arranged with a gap in the circumferential direction, and winding is performed in a state where the gap between the adjacent magnetic pole portions is greatly widened, and the winding ends. After that, it is preferable that each of the divided cores is moved radially inward to return to the shape of the stator, and is taken out from the winding device while being placed on the manufacturing jig.
In the method for manufacturing a stator core according to the second invention, the assembling step includes a welding step, the manufacturing jig is arranged in a welding apparatus, and the split cores are placed on the manufacturing jig. It is preferable to take out from the welding apparatus in a state where it is placed on the manufacturing jig after welding the connecting portions of the split cores adjacent from the outside.

Since the stator core manufacturing jig according to any one of claims 1 to 5 has a guide plate on which the split core is placed, for example, the split core formed by a mold is guided in the shape of the stator core. Can be placed on a plate. Further, the divided core placed on the guide plate can be easily fixed on the guide plate by a plurality of product guide members.
Thus, unlike the conventional case, it is not necessary to individually attach each divided core to each manufacturing jig and place it on the base, so that workability can be improved and manufacturing time can be shortened. be able to.
In addition, the stator core manufacturing jig has a structure in which a split core punched into a shape of the stator core by a mold and stacked can be placed on the guide plate as it is. A core can be made into the shape of a stator core, As a result, the precision of the roundness and straightness of the manufactured stator core can be made favorable. Since each product guide member can be synchronously moved along the radial direction by the base member, the cam member, the guide plate, and the expansion / contraction mechanism, for example, each divided core can be easily moved to a position where it can be easily processed.

Particularly, in the stator core manufacturing jig according to claim 1 , the expansion / contraction mechanism is constituted by a guide groove provided in each product guide member and a sliding member provided in the cam member and moving in each guide groove. Therefore, the product guide member can be synchronously moved in the radial direction with a simple configuration.
In the stator core manufacturing jig according to claim 2 , since the product guide member includes an engaging portion that fits into a recess formed in the split core, each split core can be used as a product guide member with a simple configuration. Can be fixed.
The stator core manufacturing jig according to claim 3 has a mechanism in which the locking portion is divided in the width direction and can be expanded and contracted, so that the product can be obtained by expanding or contracting the locking portion. The split core can be easily attached to and detached from the guide block.

In the stator core manufacturing jig according to the fourth aspect , since the product guide member is a pin member that is fitted into a hole formed in the split core, the product guide member can be fixed to each split core with a simple configuration.
Since the stator core manufacturing jig according to claim 5 is annular and penetrates in the vertical direction, for example, with the split core placed on the stator core manufacturing jig, the inner side of each split core Various processing (for example, winding processing) can be performed, and workability is good. In addition, since each divided core is always moved by the product guide member on the guide plate, as in the past, the work of attaching each of the divided cores to the manufacturing jig or the removal of the manufacturing jig from various manufacturing processes is performed. There is no need to do it.

The method for manufacturing a stator core according to claims 6 to 8 includes a preparation step of placing a plurality of divided cores punched and laminated in the shape of the stator core on a production jig, and a state of placing on the production jig. Since there is an assembly process for processing each split core, it is not necessary to perform the work of attaching or removing each split core from the manufacturing jig as in the prior art, and the workability can be improved. In addition, the manufacturing time can be shortened.
In addition, since each divided core formed by the mold is punched and stacked in the shape of the stator core and placed on the manufacturing jig, as in the conventional case, the material is arranged side by side in the longitudinal direction of the strip-shaped material and In comparison, the accuracy of, for example, roundness and straightness of the manufactured stator core is excellent.
Furthermore, each divided core formed by stacking the divided core pieces punched out by the mold is formed into the shape of the stator core, so that a plurality of divided core pieces are arranged in the longitudinal direction of the belt-shaped material and the material is taken. However, the stator core and the die for punching the rotor core can be integrated and obtained from the same material. For this reason, the material cost and the manufacturing equipment cost required for punching the stator core and the rotor core can be significantly reduced as compared with the prior art, and the manufacturing cost of the motor can be reduced.

In the stator core manufacturing method according to claim 7 , each split core is moved along the radial direction in a state of being placed on the manufacturing jig, and windings are performed on each split core. It can be easily moved to a position where work is easy to perform, and workability is good.
In the method for manufacturing a stator core according to claim 8, since the divided cores arranged in the state of the stator core are placed on the manufacturing jig, the connecting portions of the adjacent divided cores are welded. In addition, it is not necessary to perform the work of attaching each split core to the manufacturing jig or the work of removing it from the manufacturing jig, and the workability is good.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
As shown in FIGS. 1 to 4, a stator core manufacturing jig (hereinafter also simply referred to as a manufacturing jig) 10 according to an embodiment of the present invention includes an arcuate yoke portion 11 and a yoke portion 11. A stator core (also referred to as a stator) 14 to be manufactured (refer to FIGS. 5 and 6), which is a device for connecting and integrating a plurality of split cores 13 having magnetic pole portions 12 extending radially inward from the circumferential direction. Each of the divided cores 13 punched and laminated in the shape of () can be placed as it is. This will be described in detail below.

As shown in FIG. 1, FIG. 2 (A), (B), the manufacturing jig 10 is made of, for example, stainless steel, steel, or an aluminum alloy whose surface is plated as necessary. The entire shape is annular and penetrates in the vertical direction. The outer diameter of the manufacturing jig 10 is, for example, about 10% to 30% larger than the diameter of the stator core 14 to be manufactured, and the inner diameter of the manufacturing jig 10 is 10 times the inner diameter of the yoke portion 11 of the stator core 14. % To 30% or less.

As shown in FIGS. 1, 2A, 2B, 3A to 3C, and FIG. 4, the manufacturing jig 10 has an annular cam ring guide (an example of a base member) at its lower end. An annular cam ring (an example of a cam member) 16 is rotatably mounted on the cam ring guide 15. The cam ring 16 is disposed on the outer peripheral portion of the cam ring guide 15 with a part protruding in the radial direction of the cam ring guide 15 in order to reduce contact resistance with the cam ring guide 15 during rotation. The turning operation of the cam ring 16 with respect to the cam ring guide 15 is performed by an operation rod 18 provided by a bolt 17 from the outer side of the cam ring 16.

On the cam ring 16, a plurality of product guide blocks (an example of a product guide member) 19 disposed at substantially equal angles in the circumferential direction are placed, and the divided core 13 is interposed between adjacent product guide blocks 19. A guide plate 20 to be placed is provided. The number of product guide blocks 19 corresponds to the number of division cores 13 in the circumferential direction, and is one for each division core (here, a total of six), but one division core. There may be more than one.
The product guide block 19 fixes the split core 13 on the guide plate 20 and includes a locking portion 21 on the radially inner side, and the locking portion 21 is viewed in plan view from a radially outer portion of the product guide block 19. It is wide. As described above, the product guide block 19 includes the locking portion 21 that fits into the concave portion 22 formed on the outer periphery of the yoke portion 11 of the split core 13, so that the split core 13 can be easily positioned with respect to the product guide block 19. it can. The width of the locking portion 21 of the product guide block 19 increases from the base side to the front side (radially inner side), and the inner width of the concave portion 22 of the split core 13 corresponds to this. The division core 13 can be securely fixed to each product guide block 19.

A product guide block 19a shown in FIG. 2C can also be used. This product guide block 19a has a locking portion 21a which is a pair provided with a mechanism (for example, a screw mechanism) that is divided in the width direction and can be expanded and contracted.
Here, in a state where the interval between the pair of locking portions 21a is narrowed, the locking portion 21a is inserted into the concave portion 22 of the split core 13, and then the interval between the locking portions 21a is widened, whereby the product guide block 19a. It becomes easy to fix the split core 13 to the core.
On the other hand, when removing the split core 13 from the product guide block 19a, by reducing the interval between the pair of locking portions 21a, stress such as torsion is generated between the split cores 13 by winding or welding, for example. Even if it occurs, it is possible to avoid the difficulty of removing the split core 13 from the product guide block 19a.
In this manner, the splitting core 13 can be easily attached to and detached from the product guide block 19a by expanding and contracting the locking portion 21a.

In addition, instead of the product guide block 19, as shown in FIGS. 2 (A) and 2 (B), a pin that fits into a hole 23 formed on the lower side of the split core and in the central portion in the circumferential direction of the yoke portion. It is also possible to use members. In this case, holes 23a can be formed on both sides in the circumferential direction of the yoke portion of the split core, and pin members that fit into the holes 23a can be used, and rotation of the split core around the pin members can be prevented.
The height of such a product guide block 19 may be the same position as the height of the split core 13 or even higher. However, in consideration of the fact that the plurality of split core pieces 24 in which the split cores 13 are stacked are caulked and stacked, it is sufficient that the split cores 13 are not high enough to fall. The same applies when a pin member is used.

At the lower end portion of each product guide block 19, a cam block portion 25 that is wider in the circumferential direction than the other portions is provided. The guide plates 20 disposed on both sides of each product guide block 19 allow the cam ring 16 and The cam block portion 25 is movable along the radial direction on the slide portion 26 disposed on the radially inner side. That is, the moving direction of the cam block portion 25 is set by the guide portion 27 of the guide plate 20, and the cam block portion 25 is prevented from coming off by the slide cover 29 provided by the bolt 28 on the guide portion 27. Yes.
A notch 30 is provided in the lower outer peripheral portion of the guide portion 27, and the cam ring 16 is rotatably disposed in this portion. A fixed rod 31 is attached to a side portion of the guide portion 27 at a position different from the operation rod 18 provided on the cam ring 16.

The cam ring 16 and each product guide block 19 are provided with an expansion / contraction mechanism 32 that rotates the cam ring 16 to synchronously move each product guide block 19 along the radial direction.
The expansion / contraction mechanism 32 is formed on the lower end portion of the cam block portion 25 of each product guide block 19 in the circumferential direction obliquely with respect to the radial direction (for example, 30 degrees or more and 60 degrees or less: 45 degrees here). And a plurality of sliding members 34 that are provided in the circumferential direction of the cam ring 16 and move in the respective guide grooves 33. The sliding member 34 is provided with a bearing 35 on the contact surface side with the guide groove 33, and has a screw portion 36 on the lower side, which can be screwed into the cam ring 16.
The expansion / contraction mechanism may have a configuration in which a sliding member is provided in each product guide block and a plurality of guide grooves are provided in the cam ring.

By configuring in this way, when each product guide block 19 is synchronously moved radially inward, for example, the operator has the fixed rod 31 with one hand and the operation rod 18 with the other hand, The operating rod 18 is moved in the direction of increasing the distance between the fixed rod 31 and the operating rod 18, that is, counterclockwise. As a result, as shown in FIG. 2B, the cam ring 16 to which the operation rod 18 is attached rotates on the cam ring guide 15 by a predetermined angle, so that the sliding members 34 provided on the cam ring 16 are also counterclockwise. Each product guide block 19 moves inward in the radial direction.
On the other hand, when each product guide block 19 is synchronously moved outward in the radial direction, the operation rod 18 is moved in the direction of narrowing the interval between the fixed rod 31 and the operation rod 18, that is, clockwise. As a result, as shown in FIG. 2A, the cam ring 16 rotates on the cam ring guide 15 by a predetermined angle, and each sliding member 34 provided on the cam ring 16 also moves in the clockwise direction. 19 respectively move radially outward.

The rotation angle of the cam ring 16 rotating on the cam ring guide 15 is set by two bolts (rotation control units) 37 and 38 attached to the guide unit 27 so as to sandwich the operation rod 18. The rotation angle is, for example, about 5 degrees or more and 30 degrees or less.
Further, the rotation of the cam ring 16 can be mechanically performed without being performed by an operator. In this case, for example, a cam ring guide is fixed to a device for mounting a manufacturing jig, a motor (driving means) is attached to the cam ring via a reduction gear, and each product guide block is synchronized by controlling its operating time, for example. Can be moved.

Next, a method for manufacturing a stator core according to an embodiment of the present invention will be described with reference to FIG. FIG. 5 is an explanatory diagram in which the stator core manufacturing jig 10 is installed in the laminating apparatus 40. The details of the laminating apparatus 40 are disclosed in Japanese Patent Application Laid-Open No. 2006-26735 (Japanese Patent Application No. 2005-51017), and thus will be described in a simplified manner.
First, a preparation process is performed.
The split core piece 24, which is externally cut out from an electromagnetic steel plate (an example of a strip-shaped plate material) 44 by the punch 42 and the die 43 constituting the mold 41, is placed in the press holding ring 45 provided below the die 43. It is pushed and held by 42. The divided core piece 24 to be punched has an annular shape in the shape of the stator core 14 and is divided into a plurality of parts in the circumferential direction.

By repeating this operation a plurality of times, a plurality of split cores 13 formed by punching and stacking the split core pieces 24 are arranged in the shape of the stator core 14 in the press holding ring 45. Then, each of the divided cores 13 is discharged from the press holding ring 45 in a state where the shape of the stator core 14 is maintained, and is placed on the manufacturing jig 10. In addition, 46 in FIG. 5 is a cradle on which the manufacturing jig 10 is placed.

Next, after transporting the manufacturing jig 10, an assembly process is performed in which each divided core 13 is processed in a state where the divided cores 13 arranged in the shape of the stator core 14 are placed on the manufacturing jig 10.
First, the winding process which is one of the assembly processes is performed.
In the winding process, after the manufacturing jig 10 is arranged in a winding device (not shown), the operation rod 18 of the manufacturing jig 10 on which the divided cores 13 are placed is moved in a direction in which the distance from the fixed rod 31 becomes narrower. The product guide blocks 19 are moved synchronously outward in the radial direction. Thereby, each divided core 13 can be moved radially outward while being placed on the guide plate 20, and as a result, the adjacent divided cores 13 can be arranged with a gap in the circumferential direction.
At this time, since the gap between the adjacent magnetic pole portions 12 is further widened from the initial state, workability can be improved by performing winding in this state as shown in FIG.

When winding the magnetic pole portion 12, as shown by a two-dot chain line in FIG. 1, for example, it projects radially outward from a cylindrical winding machine body 51 and is located on the winding machine body 51 side. A nozzle 54 having a large-diameter portion 52 and a small-diameter portion 53 located on the tip side away from the winding machine main body 51 can be used. The nozzle 54 has a structure in which the winding sent from the winding machine body 51 is taken out from the tip of the small diameter portion 53.
As a result, the nozzle 54 is rotated around the magnetic pole portion 12 and the winding work is performed by taking out the winding from the tip of the small diameter portion 53 of the nozzle 54.
After such winding work is completed, the operation rod 18 of the manufacturing jig 10 on which each divided core 13 is placed is moved in a direction in which the distance from the fixed rod 31 is widened, and each product guide block 19 is moved in the radial direction. Move in sync inward. Thereby, each divided core 13 is returned to the original shape of the stator core 14, and is taken out from the winding device while being placed on the manufacturing jig 10.

And the welding process which is one of the assembly processes is performed. As shown in FIG. 6, the welding device 55 includes, for example, a plurality of welding (TIG welding) torches 58 that are integrally attached to a fixed frame 56 via a bracket 57, and the tip thereof is It is attached to contact portions of adjacent split cores 13 while moving in the vertical direction. The details of the welding device 55 are disclosed in Japanese Patent Application Laid-Open No. 2006-81378 (Japanese Patent Application No. 2004-265675), and thus will be omitted.
With the manufacturing jig 10 placed on the welding device 55 and placed on the manufacturing jig 10, a welding torch 58 is installed across the vertical direction from the outside of each divided core 13 to the connecting portion of the adjacent divided core 13. Move. Then, after the welding operation of each divided core 13 is completed, the stator core 14 is taken out from the welding device 55 in a state of being placed on the manufacturing jig 10.
Thereby, the some split core 13 is connected to the circumferential direction, and it can integrate by providing a clearance gap between the magnetic pole parts 12 of each adjacent split core 13. FIG.

As described above, the present invention has been described with reference to one embodiment. However, the present invention is not limited to the configuration described in the above embodiment, and is described in the claims. Other embodiments and modifications conceivable within the scope of the above are also included. For example, the right of the present invention is also applicable when the stator core manufacturing jig of the present invention and the method of manufacturing a stator core using the same are configured by combining some or all of the above-described embodiments and modifications. Included in the range.

It is a top view of the manufacturing jig of the stator core which concerns on one embodiment of this invention. (A) is a top view which shows the diameter expansion state of the product guide member of the manufacturing jig of the stator core, (B) is a top view which shows a diameter reduction state, (C) is use of the product guide member which concerns on a modification. It is a top view of a state. 1A is a partial cross-sectional view as seen from the P1 direction in FIG. 1, FIG. 1B is a cross-sectional view taken along the line XX in FIG. 1, and FIG. 2C is a cross-sectional view taken along the line YY in FIG. It is the partial sectional side view seen from the P2 direction of FIG. It is explanatory drawing which installed the manufacturing jig of the stator core which concerns on one embodiment of this invention in the lamination apparatus. It is explanatory drawing which has arrange | positioned the manufacturing jig of the same stator core to the welding apparatus.

Explanation of symbols

10: Manufacturing jig for stator core, 11: Yoke part, 12: Magnetic pole part, 13: Split core, 14: Stator iron core, 15: Cam ring guide (base member), 16: Cam ring (cam member), 17: Bolt, 18: Operation rod, 19, 19a: Product guide block (product guide member), 20: Guide plate, 21, 21a: Locking portion, 22: Recess, 23, 23a: Hole, 24: Divided core piece, 25 : Cam block portion, 26: Slide portion, 27: Guide portion, 28: Bolt, 29: Slide cover, 30: Notch, 31: Fixed rod, 32: Expansion / contraction mechanism, 33: Guide groove, 34: Sliding member, 35: Bearing, 36: Screw part, 37, 38: Bolt (rotation control part), 40: Laminating apparatus, 41: Die, 42: Punch, 43: Die, 44: Electromagnetic steel plate (band-like plate material), 45: Press holding Ring, 46: pedestal, 51: winding machine main body, 52: large diameter portion, 53: small diameter portion, 54: nozzle, 55: Welding equipment, 56: Fixed frame, 57: Bracket, 58: Welding Torch

Claims (8)

A stator core manufacturing jig that integrates a plurality of split cores having an arc-shaped yoke portion and a magnetic pole portion extending radially inward from the yoke portion in a circumferential direction,
A base member;
A cam member rotatably mounted on the base member;
A product guide member that is mounted on the cam member and fixes the plurality of divided cores arranged at regular intervals in the circumferential direction; and
A guide plate that is disposed between the adjacent product guide members, places the split cores, and allows the split cores fixed to the product guide members to move in a radial direction;
Wherein the cam member is provided on each product guide member, by rotating the cam member, possess a scaling mechanism for synchronously moving said each product guide member along a radial direction,
In addition, the expansion / contraction mechanism includes a guide groove formed obliquely with respect to a radial direction at a lower end portion of each product guide member, and a plurality of slides provided in the circumferential direction of the cam member and respectively moving in the guide grooves. And by rotating the annular cam member on the base member, the sliding members move in the guide grooves, and the product guide members are moved radially outward. or manufacture jig of the stator core, wherein Rukoto synchronously moving radially inward. 2. The stator core manufacturing jig according to claim 1 , wherein the product guide member includes an engaging portion that fits into a recess formed on an outer periphery of the yoke portion of the split core. Iron core manufacturing jig. 3. The stator core manufacturing jig according to claim 2, wherein the locking portion includes a mechanism that is divided in the width direction and can be widened and contracted. 2. The stator core manufacturing jig according to claim 1 , wherein the product guide member has a pin member that fits into a hole formed on the lower side of the split core. . The stator core manufacturing jig according to any one of claims 1 to 4 , wherein the stator core manufacturing jig is annular and penetrates in a vertical direction. A plurality of divided cores each having an arcuate yoke portion and a magnetic pole portion extending radially inward from the yoke portion are connected in the circumferential direction, and a gap is provided between the magnetic pole portions of the adjacent divided cores to be integrated. In the method of manufacturing a stator core,
A plurality of the divided cores that are annularly punched and laminated into the shape of the stator core by a mold, and a preparation step of discharging the mold from the mold in a state of maintaining the shape;
An assembly step of processing each divided core in a state where the divided cores arranged in the shape of the stator core are placed on the manufacturing jig after the manufacturing jig is transported. To manufacture a stator core. 7. The method of manufacturing a stator core according to claim 6 , wherein the assembling step includes a winding step, and the divided cores are arranged on a winding device in a state of being placed on the manufacturing jig, and the divided cores are arranged. Each of the divided cores is moved outward in the radial direction, and the adjacent divided cores are arranged with a gap in the circumferential direction, and winding is performed in a state where the gap between the adjacent magnetic pole portions is greatly widened. Thereafter, each of the divided cores is moved radially inward to return to the shape of the stator core, and the stator core is taken out from the winding device in a state of being placed on the manufacturing jig. . In the manufacturing method of the stator core according to any one of claims 6 and 7 , the assembly process includes a welding process, the manufacturing jig is arranged in a welding apparatus, and is placed on the manufacturing jig. The stator core is manufactured in such a manner that, after welding of the connecting portions of the divided cores adjacent to each other from the outside of each of the divided cores, the stator core is taken out from the welding apparatus in a state of being placed on the manufacturing jig. Method.

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