JP6716125B1 - Laminated core, manufacturing method and manufacturing apparatus thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminated core in which both surfaces are flat surfaces without protrusions, a method for producing the laminated core, and an apparatus for producing the laminated core. A laminated core (1) has a plurality of laminated steel plates (2) for iron cores, each of the steel plates (2) has an individual hole (6) penetrating in the laminating direction (d), and the individual holes (6) extend along the laminating direction (d). A steel plate laminate 3 in which a through hole 9 extending from one surface 7 to the other surface 8 is formed, and a pin arranged in the through hole 9 so that both end surfaces of the steel plate laminate 3 are aligned with the one surface 8 and the other surface 9, respectively. And a coupling member 10 having a shape of a circle. The radial outer peripheral surfaces of both ends of the coupling member 10 are respectively joined to the inner peripheral surfaces of the individual holes 6 of the steel plates 2a and 2b at least at both ends in the stacking direction d of the plurality of steel plates 2. [Selection diagram] Figure 1

Description

The present invention relates to a laminated core using a thin electromagnetic steel sheet, a method for manufacturing the laminated core, and an apparatus for manufacturing the laminated core.

The laminated core is the main component that supports the performance of high-performance motors that continue to evolve day by day.The performance of the laminated core is directly affected by the quality performance of the high-performance motor, and the supply of high-performance laminated cores is Is desired from. In order to improve the performance of the laminated core, it is important to reduce the eddy current on the surface of the laminated core as much as possible, and thinning the electromagnetic steel sheet is the most effective means for reducing the eddy current. On the other hand, it is technically difficult to stack and fix thin electromagnetic steel plates having a plate thickness of 0.2 mm or less, and there are circumstances in which thinning cannot be achieved easily.

For example, there is a caulking method as a general method for stacking and fixing electromagnetic steel sheets, but the thin structure reduces the frictional force of the caulking portion and lowers the fixing strength. Further, in the case of the adhesive method, unevenness in the adhesive strength occurs due to the influence of oil and the variation in the amount of adhesive applied, and a high level of skill and skill is required to reduce the variation. Further, the method using a rivet or a roll pin or the like greatly improves reliability with respect to the fixing force, but there is a problem that conduction with the electromagnetic steel plate, curved distortion of the electromagnetic steel plate, and heads such as pins project from the electromagnetic steel plate. There is.

A method of manufacturing a laminated core suitable for a motor core by laminating a plurality of steel plates for iron cores is known (for example, see Patent Documents 1 to 3). In the method of Patent Document 1, a plurality of soft magnetic steel plates having a plate thickness of 0.2 mm or less obtained by punching into a predetermined shape are laminated to form a laminated body, and holes are formed in each steel plate during punching. The laminated body is fixed through rivets having a diameter of 1 to 10 mm.

In the method of Patent Document 2, the noise of the laminated core is reduced by limiting the crimping pressure of the rivet to a specific range when fixing the laminated body of steel plates with the rivet.

Further, in the method of Patent Document 3, a rivet for fixing the laminated body is coated with an insulating material to prevent short-circuiting of the steel sheet and obtain a laminated core without deterioration of iron loss characteristics. ing.

Japanese Patent No. 4844181 JP, 11-186062, A JP 2006-340548 A

However, according to the methods of Patent Documents 1 to 3 above, the laminated body of the steel plates is fixed by the rivets, so that the laminated core can be stably fixed, but the head of the rivet or the caulked portion is the laminated body. By projecting from the surfaces on both sides, the work of winding the laminated core is hindered, and the deterioration of the characteristics of the laminated core is also affected.

In view of the problems of the related art, an object of the present invention is to stably fix a laminated core of a thin electromagnetic steel plate having a plate thickness of 0.2 mm or less, eliminate curved distortion of the electromagnetic steel plate, and project from both surfaces. It is an object to provide a laminated core without parts, a method for manufacturing the laminated core, and an apparatus for manufacturing the laminated core.

The laminated core manufacturing method of the present invention,
It has a plurality of laminated steel plates for iron cores, each steel plate has individual holes having the same diameter penetrating in the laminating direction, and the individual holes from one surface of the steel plate laminate to the other along the laminating direction. A laminate forming step of forming the steel plate laminate in which a through hole perpendicular to the surface reaching
After the laminate forming step, with respect to the through hole, rather long than the through hole diameter in equivalent and the individual hole, insert the actual coupling members in having a vertical end surfaces in the long direction And an inserting/projecting step of projecting both ends of the coupling member from the one and the other surfaces of the steel plate laminate, respectively.
After the inserting/projecting step, the contact surfaces of the laminated bodies are contacted in parallel by abutting the contact surfaces of the laminated bodies in parallel around the respective portions of the one surface and the other surface excluding the portions where both ends of the coupling member respectively project. A steel plate laminate pressing/supporting step of supporting the periphery of the portion in the contact direction while pressing the laminate contact surface,
After the step of pressing/supporting the steel plate laminate is started, in parallel with the step of pressing/supporting the steel plate laminate, the connecting member contact surfaces are brought into parallel contact with both end surfaces of the connecting member in the contact direction. By pressing both end surfaces with the connecting member abutting surface, the connecting member that pushes both end portions of the connecting member into the through hole until the both end surfaces coincide with the corresponding one surface and the other surface, respectively. Equipped with a pressing and pushing process,
By the joining member pressing/pushing step, the radial outer circumferential surfaces of both ends of the joining member are joined to the inner circumferential surfaces of the individual holes of the steel sheets at least at both ends in the stacking direction of the plurality of steel sheets. And fixing the steel plate laminate .
Further, another laminated core manufacturing method of the present invention is
It has a plurality of laminated steel plates for iron cores, each steel plate has individual holes having the same diameter penetrating in the laminating direction, and the individual holes from one surface of the steel plate laminate to the other along the laminating direction. A laminate forming step of forming the steel plate laminate in which a through hole perpendicular to the surface reaching
After the laminate forming step, with respect to the through hole, rather long than the through hole diameter in equivalent and the individual hole, insert the actual coupling members in having a vertical end surfaces in the long direction And an inserting/projecting step of projecting both ends of the coupling member from the one and the other surfaces of the steel plate laminate, respectively.
After the inserting/projecting step, the connecting member contact surface is brought into parallel contact with the end surface of the one end of the connecting member protruding from the one surface of the steel plate laminate, and the connecting member contact surface is contacted in parallel in the contact direction. An end surface is supported by the joining member contact surface, and a laminate contact surface is provided around the portion of the one surface of the steel plate laminate except for a portion where the one end of the joining member projects. Parallel to each other, and while supporting the periphery of the portion in the contact direction with the laminated body contact surface, the other end of the connecting member is parallel to the end surface of the end of the connecting member pressing surface. A first pressing step in which the end surface is pressed into the through hole until the end surface is aligned with the other surface of the steel plate laminate by pressing the connecting member pressing surface in the contact direction.
After the first pressing step, the other surface of the steel sheet laminate and the end surface of the other end of the connecting member which are matched in the first pressing step are supported by a flat surface, and the connecting member has a flat surface. By pressing the pressing surface in parallel with the end surface of the one end and pressing the end surface with the pressing surface in the contact direction, the one end of the coupling member is inserted into the through hole. A second pressing step of pressing until the end surface of the end portion matches the one surface of the steel plate laminate,
By the first and second pressing steps, the radial outer peripheral surfaces of both ends of the joining member are respectively bonded to the inner peripheral surfaces of the individual holes of the steel plates at least at both ends in the stacking direction of the plurality of steel plates. Then, the steel plate laminate is fixed .

According to each laminated core manufacturing method of the present invention , by pressing both end surfaces of the joining member whose both ends protrude from the surface of the steel plate laminate to be pushed into both sides of the through hole respectively, the steel plates at both ends in the laminating direction are individually separated. Since the radial outer circumferential surfaces of both ends of the joining member are joined to the inner circumferential surface of the hole, the steel sheet laminate can be easily fixed by the joining member, and at the same time, the surfaces of both sides of the laminated core are not protruded. It is possible to make a flat surface.

The laminated core manufacturing apparatus of the present invention,
Having a plurality of laminated steel plates for iron cores, each steel plate has an individual hole having the same diameter penetrating in the laminating direction, and from one surface of the steel plate laminate along the laminating direction by the individual hole. other leading to face said surface perpendicular through hole is formed, and with respect to the through-hole, rather long than the through hole diameter in equivalent and the individual hole, perpendicular both ends the long direction A solid connecting member having a surface is inserted so that both ends of the connecting member project from the one surface and the other surface of the steel plate laminate as one side end and the other side end, respectively. A laminated core manufacturing apparatus for manufacturing a laminated core by fixing the steel plate laminate with the joining member,
A first support portion,
A second support part that is moved relative to the first support part in the approaching/separating direction,
The first support portion is
A first body portion,
One side that is a first projecting portion that projects from the first main body portion in a direction approaching the second supporting portion, and an end surface of the first projecting portion is an end surface of the one side end portion of the coupling member. The first protrusion that constitutes a first coupling member contact surface that abuts in parallel to the end surface and supports the one end surface in the contact direction;
A first laminated body contact surface that abuts in parallel to the periphery of the one side surface of the steel sheet laminate except the portion where the one end projects and supports the periphery of the portion in the abutting direction. And a first plate member having a first through hole through which the first protruding portion comes in and out, and is guided on the first main body portion in the approaching/separating direction,
A first urging means for urging the first plate member from the first main body portion in a direction approaching the second support portion,
In the first support portion, the one end surface can be supported by the first coupling member contact surface, and the one surface of the steel plate stack can be supported by the first stack contact surface. Is provided with a positioning pin for disposing the steel plate laminate on the first plate material,
The second support portion is
A second body portion,
A second projecting portion projecting from the second main body portion in a direction approaching the first supporting portion, the end face of which is parallel to the other end face of the other end of the coupling member. The second projecting portion which constitutes a second coupling member contact surface that contacts and supports the other end surface in the contact direction;
A second laminated body contact surface that abuts in parallel to the periphery of the other surface of the other surface of the steel sheet laminate except the portion where the other end projects and supports the periphery of the portion in the contact direction. And a second plate member having a second through hole through which the second projecting portion comes in and out, and which is guided on the second main body portion in the approaching/separating direction,
Second urging means for urging the second plate member from the second main body portion in a direction approaching the first support portion,
The first and second support portions support the other end surface by the second coupling member contact surface and the other one of the steel plate laminates by the second laminate contact surface when the first and second support portions approach each other. The first and second plate members are guided in the approaching/separating direction so that the surface can be supported,
The amount of protrusion of each of the first and second protrusions from the first and second body portions resists the urging force of the first and second urging means and causes the second body portion to move to the second The first and second laminated body abutting surfaces are brought into contact with the one and the other surfaces, respectively , by bringing the first main body portion in which the steel sheet laminated body is arranged on one plate material into contact, and When the first and second body portions are brought into contact with the first and second plate members, respectively, the end surfaces of the first and second protruding portions are aligned with the first and second laminated body contact surfaces, respectively. projecting amount der is,
In a state before the first and second laminated body contact surfaces are in contact with the one surface and the other surface, respectively, the first and second coupling member contact surfaces are the same as those of the first and second biasing members. Due to the urging force, the first and second laminated body contact surfaces are separated from the first and second body portions by first and second distances, respectively, and the first and second distances are respectively, It is characterized in that it is larger than the protruding amount from the one surface and the other surface of the coupling member .

According to the present invention, the steel plate laminated body in which the joining member is inserted has one surface and the other surface abutted on the first and second laminated body abutting surfaces of the first and second supporting portions, respectively. Supported by the first and second support portions. Then, by bringing the second main body portion closer to the first main body portion, the first and second coupling member contact surfaces are brought into contact with both end surfaces of the coupling member. Further, by bringing the second main body portion closer to the first main body portion, both end surfaces of the joining member are pressed by the first and second joining member contact surfaces, and both end portions of the joining member penetrate the steel plate laminate. It can be pushed into both ends of the hole.

Therefore, by only bringing the second main body portion once closer to the first main body portion, the radial outer peripheral surfaces of the both ends of the joining member can be formed without protruding the both end portions of the joining member from the surfaces of both sides of the steel plate laminate. It is possible to reliably join the inner peripheral surfaces of the individual holes of both outer steel plates.

It is a sectional view showing a part of laminated core concerning one embodiment of the present invention. 2A is a plan view of a laminated core manufacturing apparatus for manufacturing the laminated core of FIG. 1, and FIG. 2B is a sectional view thereof. It is sectional drawing which shows a mode when processing is performed by the laminated core manufacturing apparatus of FIG. 2A and FIG. 2B. It is sectional drawing which shows some steel plate laminated bodies processed by the laminated core manufacturing apparatus of FIG. 2A and FIG. 2B. It is sectional drawing which shows a mode after the insertion process in the laminated core manufacturing method which concerns on another embodiment of this invention. It is sectional drawing which shows the mode after the insertion process in the laminated core manufacturing method which concerns on another embodiment of this invention. It is sectional drawing which shows a part of laminated core which concerns on the modification of this invention.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a part of a laminated core according to an embodiment of the present invention. As shown in FIG. 1, the laminated core 1 includes a steel plate laminate 3 in which a plurality of thin steel plates 2 for iron cores are laminated. The laminated core 1 is used for a motor core, and as shown in FIG. 2A, the central portion of the steel plate laminate 3 is a central cylindrical hole 4 coupled to the shaft of the motor. A plurality of teeth portions 5 are formed on the outer peripheral portion of the.

Each steel plate 2 is provided with an individual hole 6 penetrating in the laminating direction d of the steel plate laminate 3. The steel sheet laminate 3 has through holes 9 extending from one surface 7 to the other surface 8 of the steel sheet laminate 3 along the laminating direction d by the individual holes 6 of each laminated steel sheet 2.

In the steel plate laminate 3, the pin-shaped coupling member 10 has through-holes 9 so that both end faces 11 and 12 thereof are aligned with the one and the other faces 7 and 8 of the steel plate laminate 3 in the laminating direction d. It is located inside. The radial outer peripheral surfaces of both ends of the coupling member 10 are respectively joined to the inner peripheral surfaces of the individual holes 6 of the steel plates 2a and 2b at least at both ends of the plurality of steel plates 2 in the stacking direction d. It is desirable to insulate the surface of the coupling member 10 by, for example, cationic electrodeposition coating, but the insulating method is not limited to this, such as silica-based insulating material, zinc black dyeing treatment, and resin cover.

2A and 2B are a plan view and a sectional view of a laminated core manufacturing apparatus 13 for manufacturing the laminated core 1 of FIG. As shown in FIG. 4, in the laminated core manufacturing apparatus 13, a pin-shaped coupling member 10 having a length longer than the length of the through hole 9 is provided at both ends of the through hole 9 of the steel plate laminate 3. The laminated core 1 is manufactured by processing the steel sheet laminate 3 inserted so as to project from the one surface 7 and the other surface 8 of the steel sheet 3.

As shown in FIGS. 2A and 2B, the laminated core manufacturing apparatus 13 includes first and second support parts 14 and 15. The first and second support portions 14 and 15 contact the first and second surfaces 7 and 8 of the steel plate laminate 3 respectively, and the first and second contact surfaces 16 and 17, and the first and second surfaces 7 and 7. , And first and second coupling member abutting surfaces 18 and 19 respectively abutting the end faces of both ends of the coupling member 10 protruding from the first and second coupling members 10.

The first and second coupling member contact surfaces 18 and 19 press the opposite end surfaces 11 and 12 of the coupling member 10 that are in contact with the first and second coupling member contact surfaces 18 and 19, respectively, to penetrate the through hole 9. By pressing into the inner peripheral surface of the individual holes 6 of the steel plates 2a, 2b at least at both ends of the plurality of steel plates 2, it functions as a pressing surface for joining the radial outer peripheral surfaces of both ends of the coupling member 10. ..

In addition, the first and second support portions 14 and 15 respectively include the first main body portion 20, the second main body portion 21 that approaches and separates from the first main body portion 20, and the first and second main body portions 20. , 21 protruding from the first and second main body portions 20 and 21 in the stacking direction d on the first and second main body portions 20 and 21, respectively. The second plate members 24, 25 and the first and second biasing means 26, 27 for biasing the first and second plate members 24, 25 in the directions away from the first and second main body units 20, 21, respectively. Prepare

The end faces of the first and second projecting portions 22 and 23 form the above-described first and second coupling member contact faces 18 and 19, respectively. The first and second plate members 24 and 25 include the first and second through holes 28 and 29 through which the first and second projecting portions 22 and 23 come in and out, respectively, and the above-described first and second laminate contact surfaces 16. Have 17.

The amount of protrusion of the first and second projecting portions 22 and 23 from the first and second body portions 20 and 21 depends on the proximity of the second body portion 21 to the first body portion 20 so that the first and second stacked bodies contact each other. The surfaces 16 and 17 are brought into contact with one and the other surfaces 7 and 8 of the steel plate laminate 3, and the first and second main body portions 20 and 21 are brought into contact with the first and second plate members 24 and 25, respectively. The end surfaces 11 and 12 of the first and second protrusions 22 and 23 are set so as to match the first and second laminated body contact surfaces 16 and 17, respectively.

In addition, the first main body portion 20 is provided with several positioning pins 30 and a central cylindrical portion 31 for positioning the steel plate laminate 3 on the first plate member 24 in parallel to the laminating direction d. The first plate member 24 is provided with through guide holes 32 and 33 through which the positioning pin 30 and the central cylindrical portion 31 slidably pass.

That is, the first plate member 24 is movably guided in the stacking direction d by the positioning pin 30 and the central cylindrical portion 31. Correspondingly, the second plate member 25 is provided with guide holes 34 and 35 for receiving the positioning pin 30 and the distal end portions of the central cylindrical portion 31, respectively.

Further, the second body portion 21 is provided with a guide pin 36 that guides the second support portion 15 with respect to the first support portion 14 in the stacking direction d. The second plate member 25 is provided with a penetration guide hole 37 through which the guide pin 36 slidably penetrates. Corresponding to this, the first plate member 24 is provided with a through guide hole 38 through which the tip end side of the guide pin 36 slidably passes. The first body portion 20 is provided with a guide hole 39 that receives the tip end portion of the guide pin 36.

Therefore, when the second main body portion 21 is brought close to the first main body portion 20 and the coupling member 10 is processed, the second main body portion 21 and the first main body portion 20 have the positioning pin 30 and the central cylindrical portion 31. , And appropriately guided and positioned via the guide pins 36. The second main body portion 21 is held by the driving means 40 that uses hydraulic pressure to bring the second main body portion 21 closer to the first main body portion 20 along the stacking direction d.

In order to manufacture the laminated core 1 of FIG. 1 by the laminated core manufacturing apparatus 13, first, the above-mentioned steel plate laminated body 3 is formed (laminated body forming step). Next, a pin-shaped coupling member 10 longer than the length of the through hole 9 is inserted into the through hole 9 of the steel plate laminate 3, and both ends of the coupling member 10 are attached to one and the other surfaces of the steel plate laminate 3. 7 and 8 are projected (insertion/projection process).

Next, the steel plate laminate 3 with the joining member 10 inserted therein is attached to the laminated core manufacturing apparatus 13. That is, the positioning pin 30 of the first support portion 14 is inserted between the corresponding tooth portions 5 of the steel plate laminate 3, the central cylindrical portion 31 is penetrated through the central cylindrical hole 4, and one of the steel plate laminate 3 is inserted. The surface 7 is brought into contact with the first laminated body contact surface 16 to support the steel plate laminated body 3 by the first support portion 14.

Next, the second laminated body contact surface 17 abuts on the other surface 8 of the steel plate laminated body 3, and the first and second coupling member abutment surfaces 18 and 19 are attached to both end surfaces 11 and 12 of the coupling member 10. The second support portion 15 is lowered until they come into contact with each other. At this time, the guide pin 36 of the second main body portion 21 penetrating the penetrating guide hole 37 of the second plate member 25 penetrates the penetrating guide hole 38 of the first plate member 24, and further the guide hole of the first main body portion 20. By entering 39, the second support portion 15 is guided with respect to the first support portion 14 accurately and finally against the biasing force of the first and second biasing means 26, 27. It As a result, the laminated core manufacturing apparatus 13 is brought into the state shown in FIG.

Further, until the first and second body portions 20 and 21 come into contact with the first and second plate members 24 and 25 against the urging force of the first and second urging means 26 and 27, the second body portion 21. Will be moved. At this time, both end faces 11 and 12 are pressed by the first and second joint member contact faces 18 and 19 of the first and second projecting portions 22 and 23 that are in contact with both end faces 11 and 12 of the joint member 10. To be done. At this time, the pressing force applied to both end surfaces 11 and 12 is almost equal due to the elastic force of the first and second biasing means 26 and 27.

As a result, both ends of the protruding coupling member 10 are pushed into both sides of the through hole 9, respectively. As a result, the radial outer circumferential surfaces of both ends of the joining member 10 are joined to the inner circumferential surfaces of the individual holes 6 of at least the steel sheets 2a, 2b at both ends in the stacking direction d of the plurality of steel sheets 2 (joining step). .. Thereby, the steel plate laminate 3 is bound by the joining member 10 and securely fixed, and the laminated core 1 as shown in FIG. 1 is obtained.

According to the present embodiment, the amount of protrusion of the first and second protrusions 22 and 23 from the first and second main body portions 20 and 21 depends on the first and second protrusions 22 and 23 as described above. The end surfaces 11 and 12 of the first and second projecting portions 22 and 23 are set to match the first and second laminated body contact surfaces 16 and 17, respectively, when the pressing of the coupling member 10 is completed. For this reason, in the obtained laminated core 1, as shown in FIG. 1, both end surfaces of the coupling member 10 form flat planes with the one and the other surfaces 7 and 8 of the steel plate laminate 3, respectively.

Although the embodiment of the present invention has been described above, the present invention is not limited to this. For example, the laminated core of the present invention can also be manufactured as follows. That is, first, after the steel plate laminate 3 is formed by the above-described laminate forming step, as shown in FIG. 5, both ends of the through hole 9 are aligned with the one and the other faces 7 and 8, respectively. The pin-shaped connecting member 10b having the is inserted so that the matching is achieved (inserting step).

After the inserting step, the jigs 41 having sharp tips are pressed against both end surfaces of the joining member 10b, so that at least the inner circumference of the individual holes 6 of the steel plates 2a and 2b at both ends in the stacking direction d of the plurality of steel plates 2 are pressed. The radial outer peripheral surfaces of both ends of the joining member 10b are joined to the surfaces (joining step). As a result, it is possible to manufacture the laminated core 1b in which the joining member 10b does not protrude from the steel plate laminate 3 as shown in FIG.

In this case, a roll pin 42 as shown in FIG. 6 may be used as the joining member, and the jig 43 may be pressed against both ends of the roll pin 42 to perform the above-described joining process.

Further, in the laminated core manufacturing apparatus 13 described above, a laminated body contact surface that is fixed to the first main body portion 20 instead of the first plate member 24 and abuts on one or the other surface 7, 8 of the steel plate laminated body 3 It is also possible to employ a support portion having a coupling member contact surface that abuts the end surface of the end portion of the coupling member 10 protruding from the one or the other surface 7, 8.

In this case, the second body portion 21 is brought close to the support portion and the second body portion 21 is brought into contact with the second plate member 25, whereby the end portion of the coupling member 10 on the second plate member 25 side is formed in the through hole 9. It can be pressed in. However, in this case, the second coupling member contact surface 19 of the second projecting portion 23 up to the second stack contact surface 17 or one or the other surface 7, 8 of the steel plate stack 3 of the second biasing means 27. It need not be configured to push against the bias.

That is, instead of the second plate member 25, a flat pressing plate member fixed to the second support portion 15 is used, and the plate surface thereof is used instead of the second laminate contact surface 17 and the second coupling member contact surface 19. And the plate surface is brought into contact with one or the other surface 7, 8 of the steel plate laminate 3, the end portion of the coupling member 10 can be processed.

In this case, when the opposite side of the joining member 10 is processed, a flat plate member is arranged on the supporting portion having the above-mentioned laminated body contact surface and the joining member contact surface, and thereby the joining is performed. The surface of the steel plate laminate 3 on the side where the member 10 is processed may be supported, and the pressing plate material may be brought into contact with the steel plate laminate 3 in the same manner.

Further, as the coupling member 10, a resin pin or an insulating coated steel tube may be used. Further, the laminated core 1 as shown in FIG. 1 may be formed by pouring the adhesive into the through holes 9 of the steel plate laminate 3 and causing the solidified adhesive to function as the coupling member 10. Further, the present invention can be applied not only to the rotor core but also to the stator core.

Further, as shown in FIG. 7, as the steel plates 2a and 2b at both ends of the stacking direction d, by adopting a steel plate thicker than the steel plate 2 between them, one surface 7 and the other surface 8 of the steel plate laminate 3 are adopted. It may be possible to prevent unevenness from occurring as much as possible. In this case, for example, 0.5 to 1.0 mm is adopted as the thickness of the steel plates 2a and 2b at both ends of the stacking direction d, and the thickness of the steel plate 2 between them is 0.05 to 0 mm. 0.1 mm can be adopted.

1, 1b... Laminated core, 2 2a, 2b... Steel plate, 3... Steel plate laminate, 4... Central cylindrical hole, 5... Teeth part, 6... Individual hole, 7... One surface, 8... Other surface, 9 ... through-holes, 10 and 10b ... coupling members, 11 ... end faces, 12 ... end faces, 13 ... laminated core manufacturing device, 14 ... first support portion, 15 ... second support portion, 16 ... first laminate contact surface, 17... 2nd laminated body contact surface, 18... 1st coupling member contact surface, 19... 2nd coupling member contact surface, 20... 1st main-body part, 21... 2nd main-body part, 22... 1st protrusion part , 23... Second protrusions, 24... First plate material, 25... Second plate material, 26... First biasing means, 27... Second biasing means, 28... First through hole, 29... First through hole, 30... Positioning pin, 31... Central cylindrical portion, 32... Through guide hole, 33... Through guide hole, 34... Guide hole, 35... Guide hole, 36... Guide pin, 37... Through guide hole, 38... Through guide hole, 39... Guide hole, 40... Driving means, 41... Jig, 42... Roll pin, 43... Jig.

Claims (3)

It has a plurality of laminated steel plates for iron cores, each steel plate has individual holes having the same diameter penetrating in the laminating direction, and the individual holes from one surface of the steel plate laminate to the other along the laminating direction. A laminate forming step of forming the steel plate laminate in which a through hole perpendicular to the face reaching the face is formed,
After the laminate forming step, with respect to the through hole, rather long than the through hole diameter in equivalent and the individual hole, insert the actual coupling members in having a vertical end surfaces in the long direction Then, an inserting/projecting step of projecting both end portions of the coupling member from the one surface and the other surface of the steel plate laminate, respectively.
After the inserting/projecting step, the contact surfaces of the laminated bodies are contacted in parallel by abutting the contact surfaces of the laminated bodies in parallel around the respective portions of the one surface and the other surface excluding the portions where both ends of the coupling member respectively project. A steel plate laminate pressing/supporting step of supporting the periphery of the portion in the contact direction while pressing the laminate contact surface,
After the step of pressing/supporting the steel plate laminate is started, in parallel with the step of pressing/supporting the steel plate laminate, the connecting member contact surfaces are brought into parallel contact with both end surfaces of the connecting member in the contact direction. By pressing both end surfaces with the connecting member abutting surface, the connecting member that pushes both end portions of the connecting member into the through hole until the both end surfaces coincide with the corresponding one surface and the other surface, respectively. Equipped with a pressing and pushing process,
By the joining member pressing/pushing step, the radial outer circumferential surfaces of both ends of the joining member are joined to the inner circumferential surfaces of the individual holes of the steel sheets at least at both ends in the stacking direction of the plurality of steel sheets. A method for manufacturing a laminated core , characterized in that the steel sheet laminate is fixed . It has a plurality of laminated steel plates for iron cores, each steel plate has individual holes having the same diameter penetrating in the laminating direction, and the individual holes from one surface of the steel plate laminate to the other along the laminating direction. A laminate forming step of forming the steel plate laminate in which a through hole perpendicular to the surface reaching
After the laminate forming step, with respect to the through hole, rather long than the through hole diameter in equivalent and the individual hole, insert the actual coupling members in having a vertical end surfaces in the long direction And an inserting/projecting step of projecting both ends of the coupling member from the one and the other surfaces of the steel plate laminate, respectively.
After the inserting/projecting step, the connecting member contact surface is brought into parallel contact with the end surface of the one end of the connecting member protruding from the one surface of the steel plate laminate, and the connecting member contact surface is contacted in parallel in the contact direction. An end surface is supported by the joining member contact surface, and a laminate contact surface is provided around the portion of the one surface of the steel plate laminate except for a portion where the one end of the joining member projects. Parallel to each other, and while supporting the periphery of the portion in the contact direction with the laminated body contact surface, the other end of the connecting member is parallel to the end surface of the end of the connecting member pressing surface. A first pressing step in which the end surface is pressed into the through hole until the end surface is aligned with the other surface of the steel plate laminate by pressing the connecting member pressing surface in the contact direction.
After the first pressing step, the other surface of the steel sheet laminate and the end surface of the other end of the connecting member which are matched in the first pressing step are supported by a flat surface, and the connecting member has a flat surface. By pressing the pressing surface in parallel with the end surface of the one end and pressing the end surface with the pressing surface in the contact direction, the one end of the coupling member is inserted into the through hole. A second pressing step of pressing until the end surface of the end portion matches the one surface of the steel plate laminate,
By the first and second pressing steps, the radial outer peripheral surfaces of both ends of the joining member are respectively bonded to the inner peripheral surfaces of the individual holes of the steel plates at least at both ends in the stacking direction of the plurality of steel plates. A method for manufacturing a laminated core , characterized in that the steel sheet laminate is fixed by the above . Having a plurality of laminated steel plates for iron cores, each steel plate has an individual hole having the same diameter penetrating in the laminating direction, and from one surface of the steel plate laminate along the laminating direction by the individual hole. other leading to face said surface perpendicular through hole is formed, and with respect to the through-hole, rather long than the through hole diameter in equivalent and the individual hole, perpendicular both ends the long direction A solid connecting member having a surface is inserted so that both ends of the connecting member project from the one surface and the other surface of the steel plate laminate as one side end and the other side end, respectively. A laminated core manufacturing apparatus for manufacturing a laminated core by fixing the steel plate laminate with the joining member,
A first support portion,
A second support part that is moved relative to the first support part in the approaching/separating direction,
The first support portion is
A first body portion,
One side that is a first projecting portion that projects from the first main body portion in a direction approaching the second supporting portion, and an end surface of the first projecting portion is an end surface of the one side end portion of the coupling member. The first protrusion that constitutes a first coupling member contact surface that abuts in parallel to the end surface and supports the one end surface in the contact direction;
A first laminated body contact surface that abuts in parallel to the periphery of the one side surface of the steel sheet laminate except the portion where the one end projects and supports the periphery of the portion in the abutting direction. And a first plate member having a first through hole through which the first protruding portion comes in and out, and is guided on the first main body portion in the approaching/separating direction,
A first urging means for urging the first plate member from the first main body portion in a direction approaching the second support portion,
In the first support portion, the one end surface can be supported by the first coupling member contact surface, and the one surface of the steel plate stack can be supported by the first stack contact surface. Is provided with a positioning pin for disposing the steel plate laminate on the first plate material,
The second support portion is
A second body portion,
A second projecting portion projecting from the second main body portion in a direction approaching the first supporting portion, the end face of which is parallel to the other end face of the other end of the coupling member. The second projecting portion which constitutes a second coupling member contact surface that contacts and supports the other end surface in the contact direction;
A second laminated body contact surface that abuts in parallel to the periphery of the other surface of the other surface of the steel sheet laminate except the portion where the other end projects and supports the periphery of the portion in the contact direction. And a second plate member having a second through hole through which the second projecting portion comes in and out, and which is guided on the second main body portion in the approaching/separating direction,
Second urging means for urging the second plate member from the second main body portion in a direction approaching the first support portion,
The first and second support portions support the other end surface by the second coupling member contact surface and the other one of the steel plate laminates by the second laminate contact surface when the first and second support portions approach each other. The first and second plate members are guided in the approaching/separating direction so that the surface can be supported,
The amount of protrusion of each of the first and second protrusions from the first and second body portions resists the urging force of the first and second urging means and causes the second body portion to move to the second The first and second laminated body abutting surfaces are brought into contact with the one and the other surfaces, respectively , by bringing the first main body portion in which the steel sheet laminated body is arranged on one plate material into contact, and When the first and second body portions are brought into contact with the first and second plate members, respectively, the end surfaces of the first and second protruding portions are aligned with the first and second laminated body contact surfaces, respectively. projecting amount der is,
In a state before the first and second laminated body contact surfaces are in contact with the one surface and the other surface, respectively, the first and second coupling member contact surfaces are the same as those of the first and second biasing members. Due to the urging force, the first and second laminated body contact surfaces are separated from the first and second body portions by first and second distances, respectively, and the first and second distances are respectively, An apparatus for manufacturing a laminated core , wherein the amount of protrusion from the one surface and the other surface of the coupling member is larger .

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