JP6899873B2 - Laminated iron core manufacturing method and laminated iron core manufacturing equipment for rotary electric machines - Google Patents

Description

This application is intended to relate to laminated core manufacturing method and laminated core manufacturing equipment of the rotary electric machine.

Conventionally, a method of materializing (co-extracting) the steel plate of the stator and the rotor from the same strip-shaped steel plate has been proposed. For example, in Patent Document 2, the core is divided into three and punched from the inside of the annulus of the rotor. We are trying to make effective use of materials.
In addition, there is a thickness deviation of each iron core piece in the material, and when the laminated iron core is manufactured by laminating the individual iron core pieces of the stator and the rotor in the die, the thickness deviation of each iron core piece is accompanied by the thickness deviation of the laminated iron core. In order to prevent the stacking thickness deviation, it is common to adopt a rolling stack in which the blank die is rotated by a predetermined angle for each one or a plurality of iron core pieces (see Patent Document 1).
Conventional methods for manufacturing laminated steel cores include those using grain-oriented electrical steel sheets or non-oriented electrical steel sheets, but grain-oriented electrical steel sheets have magnetic anisotropy, and even non-oriented electrical steel sheets have magnetic anisotropy. have. If you try to remove as many iron core pieces as possible from the electrical steel strip, there will be parts where the orientation of the teeth, core back, etc., which requires better magnetic properties, and the magnetic anisotropy direction of the electrical steel sheet do not match, so the material performance There was a problem that I could not pull out. In Patent Document 2, the material of the stator core is taken from the rotor core, but there is a problem that the characteristics of the material cannot be brought out because the directions facing the stator are different depending on the teeth.
In addition, since the thickness of the thin plate material differs depending on the distance position from the end of the strip-shaped material, if the thin plate material is forcibly arranged and molded, the material direction and the tooth direction will be different for each channel from which the material is taken, so that the laminated cores are laminated in the direction of the laminated core. There was a problem that the degree of change in the total length was different. For example, there is a problem that the thickness variation of the core tends to differ depending on the position and angle of material removal, such as the core back is thin and the teeth are thick, and the thin pressure changes from the center of the teeth to the left and right. ..

Japanese Unexamined Patent Publication No. 2013-226013 Japanese Unexamined Patent Publication No. 2002-186227

Electromagnetic steel sheets have magnetic anisotropy, and when trying to remove as many core pieces as possible from electrical steel strips, the orientation of teeth or core backs that require better magnetic properties and the direction of magnetic anisotropy of electrical steel sheets. Since there are parts that do not match each other, there is a problem that the material performance cannot be brought out, and there is a problem that the efficiency of the motor is lowered due to the magnetic anisotropy of the magnetic steel sheet.
In addition, in order to make effective use of the material, when punching the stator and rotor from the same material, the conventional method of manufacturing a laminated iron core with the stator and rotor is used to alleviate the lamination deviation of the electromagnetic steel plate. It is common to use a roll that changes the material direction each time the material is punched out, and since the material direction cannot be adjusted, undesired cogging torque or torque ripple is generated due to the magnetic anisotropy of the electromagnetic steel plate. There was a challenge.

The present application discloses a technique made in view of the above circumstances, and aims to improve motor efficiency and suppress cogging torque or torque ripple. Is.

The method for manufacturing a laminated iron core of a rotary electric machine disclosed in the present application is a stator core element configured by axially laminating a plate-shaped stator core element formed in a T shape by a teeth portion and a core back portion. A stator core formed by connecting laminated blocks in an annular shape in the circumferential direction, and a rotor configured by laminating an annular plate-shaped rotor core element in the axial direction and surrounded by the stator core. It is a method for manufacturing a laminated iron core of a rotary electric machine having a core.
A first region for punching the annular plate-shaped rotor core element of the strip-shaped electromagnetic steel plate before the step of punching the annular plate-shaped rotor core element from the strip-shaped electromagnetic steel plate formed by rolling by a pressing mechanism. enclosed inside of a disc-shaped second region is a plurality of the plate-shaped stator core elements, in about the striking抜工enough plurality of punching抜工of the plate-shaped rotor core element, before Symbol teeth to the extending direction of the radial direction of the rotary electric machine all parts to be the same direction, moreover, the plate-like stator core feeding direction of width or spacing of the elements with respect to feed direction of the strip magnetic steel While punching into the T-shape so that there is space
In the punching step of the plate-shaped stator core element, a plurality of the plate-shaped stator core elements are also provided from the first region outside the plate-shaped rotor core element, and the extending direction of the teeth portion is Punched into the T shape by the press mechanism so that they all have the same direction.
Moreover, in the punching step, the plurality of plate-shaped stator core elements punched in the T-shape within the disk-shaped second region and the first plate-shaped rotor core element outside the plate-shaped rotor core element. The plurality of plate-shaped stator core elements punched in the T-shape in the region are the Ts of the plurality of plate-shaped stator core elements punched in the T-shape in the disk-shaped second region. The orientation of the character shape and the T-shaped orientation of the plurality of plate-shaped stator core elements punched into the T-shape in the first region outside the plate-shaped rotor core element all have the same orientation. As described above, it is punched out by the press mechanism.

In the method for manufacturing a laminated iron core of a rotary electric machine disclosed in the present application, a stator core element configured by axially laminating a plate-shaped stator core element formed in a T shape by a tooth portion and a core back portion in the axial direction. A stator core formed by connecting laminated blocks in an annular shape in the circumferential direction, and a rotor configured by laminating an annular plate-shaped rotor core element in the axial direction and surrounded by the stator core. It is a method for manufacturing a laminated iron core of a rotary electric machine having a core.
A first region for punching the annular plate-shaped rotor core element of the strip-shaped electromagnetic steel plate before the step of punching the annular plate-shaped rotor core element from the strip-shaped electromagnetic steel plate formed by rolling by a pressing mechanism. enclosed inside of a disc-shaped second region is a plurality of the plate-shaped stator core elements, in about the striking抜工enough plurality of punching抜工of the plate-shaped rotor core element, before Symbol teeth to the extending direction of the radial direction of the rotary electric machine all parts to be the same direction, moreover, the plate-like stator core feeding direction of width or spacing of the elements with respect to feed direction of the strip magnetic steel While punching into the T-shape so that there is space
In the punching step of the plate-shaped stator core element, a plurality of the plate-shaped stator core elements are also provided from the first region outside the plate-shaped rotor core element, and the extending direction of the teeth portion is Punched into the T shape by the press mechanism so that they all have the same direction.
Moreover, in the punching step, the plurality of plate-shaped stator core elements punched in the T-shape within the disk-shaped second region and the first plate-shaped rotor core element outside the plate-shaped rotor core element. The plurality of plate-shaped stator core elements punched in the T-shape in the region are the Ts of the plurality of plate-shaped stator core elements punched in the T-shape in the disk-shaped second region. The orientation of the character shape and the T-shaped orientation of the plurality of plate-shaped stator core elements punched into the T-shape in the first region outside the plate-shaped rotor core element are all in the same orientation. As described above, since the press mechanism punches the material, efficient material removal is possible, the dimensional accuracy of each plate-shaped stator core element is improved, and the motor efficiency is improved. And it becomes possible to suppress cogging torque or torque ripple.

It is a figure which shows Embodiment 1 of this application, and is the top view which shows an example of the rotary electric machine which is the object of the laminated iron core manufacturing method and the laminated iron core manufacturing apparatus of a rotary electric machine. It is a figure which shows Embodiment 1 of this application, and is the top view which illustrates the concept of the laminated iron core manufacturing method. It is a figure which shows Embodiment 1 of this application, and is the top view which shows an example of a plate-shaped stator core element. It is a figure which shows Embodiment 1 of this application, and is the perspective view which shows an example of the stator core element laminated block. It is a figure which shows Embodiment 1 of this application, and is the front view which schematically exemplifies the laminated iron core manufacturing apparatus. It is a figure which shows Embodiment 1 of this application, and is the top view which schematically exemplifies the laminated iron core manufacturing apparatus. It is a figure which shows Embodiment 1 of this application, and is the top view for demonstrating the method of punching a plurality of plate-shaped stator core elements in a plurality of punching steps. It is a figure which shows Embodiment 2 of this application, and is the top view which illustrates the concept of the laminated iron core manufacturing method. It is a figure which shows Embodiment 3 of this application, and is the top view which illustrates the concept of the laminated iron core manufacturing method. In the figure which shows Embodiment 4 of this application, (a) is a plan view which illustrates the concept of the laminated iron core manufacturing method, (b) and (c) are figure which explain the problem of the strip-shaped magnetic steel sheet formed by rolling. is there. In the figure showing the fourth embodiment of the present application, (a) and (b) are plate-shaped stator cores formed in a T shape by a tooth portion and a core back portion punched from a strip-shaped electromagnetic steel plate formed by rolling. It is a perspective view of the stator core element laminated block for demonstrating the problem of the stator core element laminated block configured by laminating elements in the axial direction. It is a figure which shows Embodiment 5 of this application, and is the top view which illustrates the concept of the laminated iron core manufacturing method. FIG. 5 is a diagram showing a fifth embodiment of the present application, and is a perspective view of a stator core element laminated block for explaining the flow of magnetic flux in the stator core element laminated block. It is a figure which shows Embodiment 6 of this application, and is the top view which illustrates the concept of the laminated iron core manufacturing method. It is a figure which shows the embodiment 7 of this application, and is the top view for demonstrating the method of punching a plurality of plate-shaped stator core elements by two punching steps. It is a top view which illustrates the 1st feature of the stator core by the manufacturing method of this application. It is a top view which illustrates the 2nd feature of the stator core by the manufacturing method of this application.

Hereinafter, a method for manufacturing a laminated iron core for a rotary electric machine, a manufacturing apparatus, and an embodiment of the rotary electric machine according to the present application will be described with reference to the drawings. The present application is not limited to the following description, and can be appropriately modified without departing from the gist of the present application. In the drawings shown below, the scale of each member may differ from the actual scale for ease of understanding, and the illustration of a configuration not related to the features of the present application is omitted.

Embodiment 1.
Hereinafter, a method for manufacturing a laminated iron core of a rotary electric machine, an apparatus for manufacturing a laminated iron core, and a first embodiment of a rotary electric machine having a laminated iron core will be described with reference to FIGS. 1 to 7 and FIG.
FIG. 1 is a plan view showing an example of a rotary electric machine for manufacturing a laminated iron core and a laminated iron core manufacturing apparatus, FIG. 2 is a plan view illustrating the concept of a laminated iron core manufacturing method, and FIG. 3 is a plate-shaped stator. A plan view showing an example of a core element, FIG. 4 is a perspective view showing an example of a stator core element laminated block, FIG. 5 is a front view schematically illustrating a laminated iron core manufacturing apparatus, and FIG. FIG. 7 is a plan view for explaining a method of punching a plurality of plate-shaped stator core elements in a plurality of punching steps, and FIG. 12 is a plan view for explaining the characteristics of the stator core. It is a plan view of.

The rotary electric machine, which is the target of the laminated iron core manufacturing method and the laminated iron core manufacturing apparatus of the rotary electric machine, is provided by the teeth portion 11T and the core back portion 11CB, as illustrated in FIGS. 1, 3 and 4. FIG. 1 shows a stator core element laminated block 11LB (see FIG. 4) formed by laminating plate-shaped stator core elements 11 (see FIG. 3) formed in a T shape in the axial direction of the rotating shaft 3. As illustrated in the above, the stator core is formed by connecting the stator in an annular shape in the circumferential direction, and the annular plate-shaped rotor core element 21 is formed by laminating in the axial direction and is surrounded by the stator core. It is a rotating electric machine having a rotor core.
The stator core element laminated block 11LB group connected in an annular shape in the circumferential direction is firmly fitted to the inner circumference of the annular frame 12. Due to the strong fitting, the stator core element laminated block 11LB group connected in an annular shape in the circumferential direction maintains a state in which the stator core element laminated blocks 11LB are connected in an annular shape in the circumferential direction, that is, the state shown in FIG.

As for the method for manufacturing a laminated iron core of a rotary electric machine, as illustrated in FIG. 2 in a plan view, a strip-shaped electromagnetic steel plate rough material ingot is pressed by a rolling roller (not shown) to form a strip-shaped electromagnetic wave. From the first region of the strip-shaped electromagnetic steel plate 4 formed by rolling in the steel plate rolling direction A4M, from the second region 42 inside the first region before the plate-shaped rotor core element 21 is punched by the press mechanism. As shown in the figure, a plurality of plate-shaped stator core elements 11, 11, ... (10 in the case of FIG. 2) that are connected in a ring shape in the circumferential direction are not all at once but spaced apart from each other. In the process, a plurality of pieces are punched out in sequence so that a plurality of pieces are punched out by the press mechanism in each process. Specifically, FIG. 5 and FIG. 6 illustrating the manufacturing apparatus 5 and FIG. 7 for explaining a method of punching a plurality of plate-shaped stator core elements in a plurality of punching steps are described in detail below. To do.

The strip-shaped electromagnetic steel sheet 4 formed by rolling in the rolling direction A4M (hereinafter, also referred to as “strip-shaped electromagnetic steel sheet rolling direction”) is directed to the manufacturing apparatus 5 in the arrow A4 direction (hereinafter, also referred to as “strip-shaped electromagnetic steel sheet feeding direction”). When fed, first, the band-shaped electromagnetic steel sheet flattening mechanism 50 flattens the irregular curvature, bending, and the like of the band-shaped electromagnetic steel sheet 4.
Specifically, the outer pilot pin 501 is inserted into the outer four corners of the first region 41, which is the punched region of the plate-shaped rotor core element 21 of the strip-shaped electromagnetic steel plate 4, by the strip-shaped electromagnetic steel plate flattening mechanism 50. Tension is applied to the electrical steel strip 4 at the four corners of the region 41, and the region (including the second region 42) surrounded by the outer pilot pins 501 at the four corners of the electrical steel strip 4 is flattened.
Further, the inner pilot pin 502 is provided by the strip-shaped electromagnetic steel plate flattening mechanism 50 at arbitrary several places in the second region 42 of the strip-shaped electromagnetic steel plate 4 (the region surrounded by the region where the plate-shaped rotor core element 21 is punched out). Is inserted at a position where it does not overlap with the punched portion of the plate-shaped stator core element 11. By inserting the inner pilot pin 502 into the strip-shaped electromagnetic steel plate 4, the generation of strain in the second region 42 of the strip-shaped electromagnetic steel plate 4 due to punching by the press mechanism of the plate-shaped stator core element 11 is suppressed. To.

In the manufacturing apparatus 5, a first press mechanism 51 is located downstream of the strip-shaped electromagnetic steel plate flattening mechanism 50 on the downstream side of the feeding direction A4 of the strip-shaped electromagnetic steel plate 4, and a second press mechanism is located downstream of the first press mechanism 51. 52, the third press mechanism 53 on the downstream side of the second press mechanism 52, the fourth press mechanism 54 on the downstream side of the third press mechanism 53, and the fourth press mechanism 54 on the downstream side of the fourth press mechanism 54. The press mechanism 55 of the fifth press mechanism 55 and the scrap cutting mechanism 56 are arranged on the downstream side of the fifth press mechanism 55, respectively.

The first press mechanism 51 has a plurality of first plate-shaped stator core element punching male dies 511 (three in the first embodiment), and also has a first plate-shaped stator core element. It has a first plate-shaped stator core element punched female die 512 formed on the die plate corresponding to the punched male die 511.
By the punching operation of the first plate-shaped stator core element punching male die 511, the first plate-shaped stator core element punching male die 511 and the first plate-shaped stator core element punching female die In cooperation with 512, the plate-shaped stator core element 11 is punched out from the strip-shaped electromagnetic steel plate 4.
The first plate-shaped stator core element storage chamber 513 corresponds to each of the plurality of first plate-shaped stator core element punching female dies 512, and a plurality of first plate-shaped stator core element laminated blocks are provided. Each outlet 514 is provided.

The second press mechanism 52 has a plurality of second plate-shaped stator core element punching male dies 521 (two in the first embodiment), and also has a second plate-shaped stator core element. It has a second plate-shaped stator core element punched female die 522 formed on the die plate corresponding to the punched male die 521.
By the punching operation of the second plate-shaped stator core element punching male mold 521, the second plate-shaped stator core element punching male mold 521 and the second plate-shaped stator core element punching female mold In cooperation with 522, the plate-shaped stator core element 11 is punched from the strip-shaped electromagnetic steel plate 4.
The second plate-shaped stator core element storage chamber 523 corresponds to each of the plurality of second plate-shaped stator core element punched female dies 522, and a plurality of second stator core element laminated blocks are provided. Each outlet 524 is provided.

The third press mechanism 53 has a plurality of third plate-shaped stator core element punching male dies 531 (three in the first embodiment), and also has a third plate-shaped stator core element. It has a third plate-shaped stator core element punched female die 532 formed on the die plate corresponding to the punched male die 531.
By the punching operation of the third plate-shaped stator core element punching male die 531, the third plate-shaped stator core element punching male die 531 and the third plate-shaped stator core element punching female die In cooperation with 532, the plate-shaped stator core element 11 is punched out from the strip-shaped electromagnetic steel plate 4.
A third plate-shaped stator core element storage chamber 533 corresponds to each of the plurality of third plate-shaped stator core element punched female dies 532, and a plurality of third stator core element laminated blocks are provided. Each outlet 534 is provided.

The fourth press mechanism 54 has a plurality of fourth plate-shaped stator core element punching male dies 541 (two in the first embodiment), and also has a fourth plate-shaped stator core element. It has a fourth plate-shaped stator core element punched female die 542 formed on the die plate corresponding to the punched male die 541.
By the punching operation of the 4th plate-shaped stator core element punching male mold 541, the 4th plate-shaped stator core element punching male mold 541 and the 4th plate-shaped stator core element punching female mold In cooperation with 542, the plate-shaped stator core element 11 is punched from the strip-shaped electromagnetic steel plate 4.
A fourth plate-shaped stator core element storage chamber 543 corresponds to each of the plurality of fourth plate-shaped stator core element punched female molds 542, and a plurality of fourth plate-shaped stator core element laminated blocks are provided. Each outlet 544 is provided.

The fifth press mechanism 55 has a fifth plate-shaped rotor core element punching male die 551, and a die plate corresponding to the fifth plate-shaped rotor core element punching male die 551. It has a fifth plate-shaped rotor core element punched female die 552 formed in.
By the punching operation of the fifth plate-shaped rotor core element punching male die 551, the fifth plate-shaped rotor core element punching male die 551 and the fifth plate-shaped rotor core element punching female die In cooperation with 552, the plate-shaped rotor core element 21 is punched from the strip-shaped electromagnetic steel plate 4.
A fifth plate-shaped rotor core element storage chamber 553 and a rotor core element laminated block discharge port 554 are provided corresponding to the fifth plate-shaped rotor core element punched female die 552. ..

As illustrated in FIG. 5, the first to fourth stator core element laminated block outlets 514, 524, 534, and 544 are punched out from the strip-shaped electromagnetic steel plate 4 in front of each of the first to fourth stator core element laminated block discharge ports 514, 524, 534, and 544. The axial length T11LB of the stator core element stacking block 11LB stored in the plate-shaped stator core element storage chambers 513, 523, 533, 543 is laminated with the first to fourth stator core elements. First to fourth stator core element laminated block axial length adjustment mechanism 515, 525, 535 to be adjusted before taking out from the block outlets 514, 524, 534, 544, that is, before assembling to the stator core 1. , 545 are provided in the manufacturing apparatus 5.

When all the punching by the first to fifth press mechanisms 51 to 55 is completed, the residual material of the strip-shaped electromagnetic steel sheet 4 is scrap material, so that the electromagnetic steel sheet scrap cutting male die 561 and the electromagnetic steel sheet scrap cutting female die 562 The scrap material cut by is accumulated in the cut electromagnetic steel sheet scrap storage chamber 563 and then taken out from the cut electromagnetic steel sheet scrap discharge port 564.

Next, according to FIGS. 7 and 5, the plate-shaped rotor core element of the strip-shaped electromagnetic steel plate is punched before the step of punching the plate-shaped rotor core element from the strip-shaped electromagnetic steel plate formed by rolling by a press mechanism. In the second region inside the first region to be punched, the plate-shaped stator core element is punched in a plurality of punching steps, and the extending direction of the teeth portion in the radial direction of the rotary electric machine is the same. The operation of punching a plurality of punches one by one will be described in the order of the punching process.

As illustrated in FIG. 7, in the first punching step, the three plate-shaped stator core elements of the strip-shaped electrical steel sheet 4 are punched in the second region 42 T _1-1 , T _{1-. 2} , T _1-3 are punched by the first press mechanism 51 of FIGS. 5 and 6, and the strip-shaped electromagnetic steel sheet 4 is fed in the strip-shaped electromagnetic steel sheet feeding direction A4 to the second punching step of the next step. Will be sent.
The three plate-shaped stator core elements 11 punched in the first punching step are the three first plate-shaped stator core element storage chambers 513, 513, of the manufacturing apparatus 5 of FIGS. 5 and 6. It is individually accumulated in 513.

As illustrated in FIG. 7, in the second punching step, the two plate-shaped stator core elements T _1-4 , T _{1- of the strip-shaped electrical steel sheet 4 are punched in the second region 42. 5} is punched by the second press mechanism 52 of FIGS. 5 and 6, and the strip-shaped electromagnetic steel sheet 4 is fed in the strip-shaped electromagnetic steel sheet feeding direction A4 and fed to the third punching step of the next step.
The two plate-shaped stator core elements 11 punched in the second punching step are in the two second plate-shaped stator core element storage chambers 523 and 523 of the manufacturing apparatus 5 of FIGS. 5 and 6. It is accumulated individually.

As illustrated in FIG. 7, in the third punching step, the three plate-shaped stator core elements T _1-6 and T _{1- of the strip-shaped electrical steel sheet 4 are punched in the second region 42. 7} and T _1-8 are punched by the third press mechanism 53 of FIGS. 5 and 6, and the strip-shaped electromagnetic steel sheet 4 is fed in the strip-shaped electromagnetic steel sheet feeding direction A4 to the fourth punching step of the next step. Will be sent.
The three plate-shaped stator core elements 11 punched in the third punching step are the three plate-shaped stator core element storage chambers 533, 533, of the manufacturing apparatus 5 of FIGS. 5 and 6. It is individually accumulated in 533.

As illustrated in FIG. 7, in the fourth punching step, the two plate-shaped stator core elements T _1-9 and T _{1- of the strip-shaped electrical steel sheet 4 are punched in the second region 42. 10} is punched by the fourth press mechanism 54 of FIGS. 5 and 6, and the strip-shaped electromagnetic steel sheet 4 is fed in the strip-shaped electromagnetic steel sheet feeding direction A4 and fed to the fifth punching step of the next step.
The two plate-shaped stator core elements 11 punched in the fourth punching step are in the two fourth plate-shaped stator core element storage chambers 543 and 543 of the manufacturing apparatus 5 of FIGS. 5 and 6. It is accumulated individually.

At the end of punching in the fourth punching step, all the plate-shaped stator core elements 11 ... 11 (second) used for the plate-shaped rotor core element 21 at the time of assembling the rotary electric machine. Ten plate-shaped stator core elements of the electrical steel strip 4 were punched out in the _{region 42 (plate-shaped stator core elements formed by punching T 1-1} to T _1-10). Become.

In the first to fourth punching steps, from the second region 42, all the plate-shaped stator core elements 11 ... 11 (first) used for the plate-shaped rotor core element 21 at the time of assembling the rotary electric machine. In the region 42 of 2, 10 plate-shaped stator core elements of the strip-shaped electromagnetic steel plate 4 were punched out (plate-shaped stator core elements formed by punching _{T 1-1} to T _1-10). The next step after that is the fifth punching step.
As illustrated in FIG. 6, the fifth punching step is a step of punching the plate-shaped rotor core element 21 from the first region 41 of the electrical steel strip 4 by the fifth press mechanism 55.
One plate-shaped rotor core element 21 punched in the fifth punching step is individually stored in the plate-shaped rotor core element storage chamber 553 of the manufacturing apparatus 5 of FIGS. 5 and 6.

When the punching in the first punching step is completed, the strip-shaped electromagnetic steel sheet 4 is fed in the strip-shaped electromagnetic steel sheet feeding direction A4, and the region punched in the first punching step is the second punching. After moving to the process and punching in the second punching step, the unpunched strip-shaped electromagnetic steel sheet 4 fed to the first punching step is punched in the second punching step. During the period in which the above is performed, the punching in the first punching step is performed. Similarly, during the period during which the punching in the fifth punching step is performed, in the first punching step, the second punching step, the third punching step, and the fourth punching step. Is punched out.

In this way, the first press mechanism 51, the second press mechanism 52, the third press mechanism 53, the fourth press mechanism 54, and the fifth press mechanism 55 are continuously operated, and a predetermined number of sheets are operated. When the plate-shaped stator core elements 11 of the above are stored in the corresponding first to fourth plate-shaped stator core element storage chambers 513, 523, 533, 543, a predetermined number of plate-shaped stator core elements 11 are stored. Is automatically extruded from the first to fourth plate-shaped stator core element storage chambers 513, 523, 533, 543 by the internal extrusion mechanism of the manufacturing apparatus 5, and the stator core element laminated block axial length adjustment mechanism is used. After adjusting the axial length T11LB of the stator core element laminated block 11LB in 515, 525, 535, 545, the first to fourth stator core element laminated block outlets 514, 524, 534 , 544 discharges the stator core element laminated block 11LB (see FIG. 4).
Similarly, when a predetermined number of plate-shaped rotor core elements 21 are accumulated in the plate-shaped rotor core element storage chamber 553, the plate-shaped rotor core elements 21 accumulated in a predetermined number of plates are extruded inside the manufacturing apparatus 5. The mechanism automatically pushes it out of the plate-shaped rotor core element storage chamber 553 and discharges it from the rotor core element laminated block discharge port 554.

As is clear from the above, in the first embodiment, the plate-shaped stator core element 11 formed in a T shape by the teeth portion 11T and the core back portion 11CB is laminated in the axial direction of the rotary electric machine. The stator core 1 formed by connecting the stator core element laminated block 11LB formed by the above in an annular direction in the circumferential direction of the rotary electric machine, and the annular plate-shaped rotor core element 21 are connected in the axial direction of the rotary electric machine. It is a method of manufacturing a laminated iron core of a rotary electric machine having a rotor core 2 surrounded by the stator core 1 by laminating the plate-shaped rotor core element from the strip-shaped electromagnetic steel plate 4 formed by rolling. Before the step of punching 21 by the press mechanism 55 (fifth punching step in this embodiment), the first region inside the first region 41 for punching the plate-shaped rotor core element 21 of the strip-shaped electromagnetic steel plate 4. In the region 42 of 2, the plate-shaped stator core element 11 is punched in a plurality of punching steps (first to fourth punching steps in the present embodiment), and all of them are in the radial direction of the rotary electric machine of the teeth portion. An example is a method of manufacturing a laminated iron core of a rotary electric machine, in which a plurality of rotary electric machines are punched so that the extending directions to the rotors are the same.

In the present embodiment, as illustrated in FIGS. 2 and 7, the number of plate-shaped stator core element punching targets for punching the plate-shaped stator core element out of the 10 plate-shaped stator core elements 11. Is punched on the central axis CH21 of the plate-shaped rotor core element 21 parallel to the rolling press feed direction A5 (that is, the strip-shaped electromagnetic steel plate rolling direction A4M, that is, the strip-shaped electromagnetic steel plate feeding direction A4). Plate-shaped rotor core element Punching target T _1-2 , T _1-7 , parallel to the rolling press feed direction A5 (that is, strip-shaped solenoid steel plate rolling direction A4M, that is, strip-shaped solenoid steel plate feeding direction A4) Plate-shaped rotor core 21 is perpendicular to the central axis CH21 to be punched and the rolling press feed direction A5 (that is, strip-shaped electromagnetic steel plate rolling direction A4M, that is, strip-shaped electromagnetic steel plate feeding direction A4). Since the element 21 is symmetrical with respect to each of the central axes CV21 to be punched, the second region surrounded by the first region 41, which is the region where the plate-shaped rotor core element 21 is punched from the strip-shaped electromagnetic steel plate 4. When the plate-shaped stator core element punching target in 42 is punched by the press mechanism, the punching pressure of the stator core element punching male mold applied to the second region 42 of the strip-shaped electromagnetic steel plate 4 is evenly distributed. , The dimensional accuracy of each of the plate-shaped stator core elements 11 is improved.
Further, since the directions of the strip-shaped electromagnetic steel plate rolling directions A4M of the plate-shaped stator core elements 11 arranged in the circumferential direction of the rotary electric machine are all the same direction, that is, the radial direction as illustrated in FIG. Cogging torque, torque ripple, etc. due to the difference in magnetic anisotropy due to the difference in the rolling direction A4M of each strip-shaped electromagnetic steel plate of the plate-shaped stator core elements 11 arranged in the circumferential direction and the angle in the orthogonal direction can be reduced.
Further, since the directions of the strip-shaped electromagnetic steel plate rolling directions A4M of the plate-shaped stator core elements 11 arranged in the circumferential direction of the rotary electric machine are all the same direction, that is, the radial direction as illustrated in FIG. 12, the rotary electric machine operates. Since the magnetic flux passing through each of the plate-shaped stator core elements 11 at the time and the direction of the strip-shaped electromagnetic steel plate rolling direction A4M are the same, the strip-shaped electromagnetic steel plate rolling direction A4M has good magnetic characteristics, so that a high torque rotary electric machine can be realized. The effect is obtained.

In the present embodiment, as shown in FIG. 7, ten plate-shaped stator core elements 11 are produced in four steps in the first to fourth punching steps. In each punching step of the first to fourth punching steps, the number of plate-shaped stator core elements 11 to be punched is 3, 2, 3, and 2, respectively, and the strip-shaped electromagnetic steel plate feeding direction. A plurality of plate-shaped stator core elements 11 are not punched out at the same time in the direction A6 perpendicular to A4 (direction A5 parallel to the strip-shaped electromagnetic steel plate feeding direction A4). Therefore, as illustrated in FIG. 7, each plate-shaped stator core element to be punched T _1-1 , T _1-2 , T _1-3 , T _1-4 , T _1-5 , T _1-6 , Plate-shaped stator core elements manufactured by punching T _1-7 , T _1-8 , T _1-9 , and T _1-10 are individually supported plate-shaped stators as shown by arrow D13 without mixing with each other. The stator core element laminated blocks 11LB of the plate-shaped stator core elements, which are individually integrated in the child core element storage chambers 513, 523, 533, 543 and thus manufactured in the first to fourth punching steps, are mutually integrated. The stator core element laminated block 11LB can be easily collected by being taken out from the individual outlets of the first to fourth stator core element laminated block discharge ports 514, 524, 534, and 544 of the manufacturing apparatus 5 without being mixed with. And the production efficiency is improved.

In each of the first to fourth punching steps, the adjacent plate-shaped stator core element punching targets are strip-shaped electromagnetic steel sheets with respect to the feeding direction A4, as illustrated in FIGS. 6 and 7. A space L16 equal to or greater than the plate-shaped stator core element width L14 (see FIG. 3) in the feeding direction A4 is provided, and the strip-shaped electromagnetic steel plate is perpendicular to the feeding direction A4 with respect to the direction perpendicular to the feeding direction A4. Since the space L17 is larger than the plate-shaped stator core element width L15 (see FIG. 3) in the direction, the die plate that receives the punching load by the press mechanism can be made rigid, so that the stator core element laminated block 11LB ( The dimensional accuracy of each plate-shaped stator core element 11 constituting (see FIG. 4) is further improved.

The number of plate-shaped stator core elements 11 punched in the punching step can be generalized as follows. That is,
The number of plate-shaped stator core elements 11 punched inside the plate-shaped rotor core element 21 is a natural number a,
Assuming that the number of punching steps in which the plate-shaped stator core element 11 is punched is a natural number b,
If a / b is not a natural number
If we set adjacent natural numbers c and d such that c> a / b> d,
The number of plate-shaped stator core elements 11 punched in the punching step of the plate-shaped stator core element 11 can be represented by a natural number c or d.

The present application is more effective in a large-diameter permanent magnet embedded motor. As an application example of a large-diameter, permanent magnet-embedded motor, a motor is placed between the engine and transmission of an automobile, and the engine is started using the motor, or the kinetic energy of the automobile is regenerated as electrical energy by power generation. There is a hybrid system that assists the engine by generating torque. In such an application example, there is a strong demand for low vibration and low noise of the motor as well as high efficiency of the motor. Further, in a large-diameter motor, the material yield is deteriorated unless the inner region (second region 42) of the plate-shaped rotor core element punched out in the strip-shaped electromagnetic steel plate is effectively used. If the plate-shaped stator core element and the plate-shaped rotor core element are manufactured by using the manufacturing method and the manufacturing apparatus of the present application, the effect that the dimensional accuracy can be improved as compared with the conventional case can be obtained. Further, since the accuracy of the stator core is also improved, it is possible to obtain the effect of suppressing the vibration and noise of the motor caused by the deterioration of the shape accuracy.

In the first embodiment, since the direction of each tooth of the plate-shaped stator core element of the split core is the same as the rolling direction A4M of the strip-shaped electromagnetic steel plate (see FIGS. 7 and 12), each of the plate-shaped stator core elements It is possible to reduce cogging torque, torque ripple, etc. caused by the difference in magnetic anisotropy due to the difference in the angle between the rolling direction and the orthogonal direction in the teeth. In addition, magnetic anisotropy has the effect of reducing the electromagnetic excitation force with a low spatial order and achieving low vibration and low noise of the motor. In particular, a so-called magnet-embedded motor in which a permanent magnet is embedded in the iron core of a rotor has problems of low vibration and low noise, so that the structure of the present application is more effective. Since the direction with good magnetic characteristics can be used, the torque of the motor is improved and the efficiency is improved.
Although the permanent magnet embedded type motor has been described here, it goes without saying that the same effect can be obtained with other motor methods such as a surface magnet type motor.

In the first embodiment, in the examples of FIGS. 5 and 6, the press mechanism for punching the plate-shaped stator core element 11 from the strip-shaped electromagnetic steel plate 4 and the plate-shaped rotor core element 21 from the strip-shaped electromagnetic steel plate 4 are used. As a press mechanism for punching, the first to fifth five press mechanisms 51, 52, 53, 54, 55 are arranged in tandem in the strip-shaped electromagnetic steel plate feeding direction A4, but the five press mechanisms 51, 52, 53, 54, 55 1st to 5th plate-shaped stator core element punching male dies 511, 521, 531, 541, 551 and 1st to 5th plate-shaped stator core element punching Punching dies 512, 522, 532, 542, 552 are arranged in one press mechanism, and the first to fifth plate-shaped stator core element punching dies 511, 521, 531, 541, The 551 may be operated with a time lag. Further, in that case, one press mechanism may be moved in the strip-shaped electromagnetic steel sheet feeding direction A4 to execute the first to fifth punching steps.
Further, the stator core element laminated block 11LB configured by laminating the plate-shaped stator core elements 11 in the axial direction of the rotary electric machine is fitted to each of the laminated plate-shaped stator core elements 11 with each other. By applying caulking in the pre-step of the first punching step, each plate-shaped stator core of the stator core element laminated block 11LB taken out from the discharge ports 514, 524, ... Of the manufacturing apparatus 5 The laminated state of the elements 11 is less likely to collapse.
In addition, FIG. 12 illustrates a case where the rolling directions A4M of each strip-shaped electromagnetic steel plate of the plate-shaped stator core elements 11 arranged in the circumferential direction of the rotary electric machine are all the same in the radial direction of the rotary electric machine. As illustrated in 13, each strip-shaped electromagnetic steel plate rolling direction A4M of the plate-shaped stator core elements 11 arranged in the circumferential direction of the rotary electric machine may be all oriented in the same direction in the circumferential direction of the rotary electric machine. If the directions of the rolling directions A4M of the strip-shaped electromagnetic steel plates of the plate-shaped stator core elements 11 arranged in the circumferential direction of the rotary electric machine are all the same, a corresponding effect is obtained.

Embodiment 2.
Hereinafter, the second embodiment will be described with reference to FIG.
Similar to the first embodiment described above, as shown in FIG. 8, the plate-shaped rotor core element 21 constituting the rotor is manufactured from the strip-shaped electromagnetic steel plate 4 by press punching.
The plate-shaped stator core element 11 is co-taken from the strip-shaped electromagnetic steel plate 4. Although not shown in FIG. 8 of the present embodiment, the plate-shaped rotor core element 21 has a magnet hole 211 for embedding a permanent magnet (see FIG. 2), as in FIG. 2 of the first embodiment. ) Is configured.
The stator core element laminated block 11LB (see FIG. 4), which is formed by laminating the plate-shaped stator core elements 11 in the axial direction of the rotary electric machine, is crimped for fixing the plate-shaped stator core elements 11 to each other. Has been done.

Also in the present embodiment, as in the first embodiment, when one strip-shaped electromagnetic steel plate 4 is sequentially fed and supplied to the mold of the press mechanism of the manufacturing apparatus 5, the plate-shaped stator core element 11 strikes. These plate-shaped stator core elements 11 are pulled out, and the rolling direction A4M of the strip-shaped electromagnetic steel plate 4 and the direction of the yoke are the same (that is, the diameter of the rotary electric machine of the teeth portion 11T of the plate-shaped stator core element 11). The extending direction EDT in the direction (see FIG. 3) is the same direction as the rolling direction A4M of the strip-shaped electromagnetic steel plate 4.). The extending direction EDCB (see FIG. 3) of the core back portion 11CB of the plate-shaped stator core element 11 is the same direction as the circumferential direction of the rotary electric machine.
Since the directions of the yokes of the split cores constituting the stator core 1 are the same, the cogging torque due to the difference in magnetic anisotropy due to the difference in the orthogonal direction from the rolling direction of the yoke (teeth portion 11T), Torque ripple can be reduced. Further, the magnetic anisotropy has the effect of reducing the electromagnetic excitation force having a low spatial order and realizing low vibration and low noise of the motor. In particular, a so-called magnet-embedded motor in which a permanent magnet is embedded in the rotor core 2 has problems of low vibration and low noise. Therefore, the structure of the second embodiment is the same as that of the first embodiment. , More effective. Since the direction with good magnetic characteristics can be used, the effect of increasing the efficiency of the motor can be obtained.

In consideration of product accuracy, the plate-shaped stator core element 11 is not punched all at the same time, but is punched in a plurality of times as in the first embodiment.
After the plate-shaped stator core element 11 is punched from the strip-shaped electromagnetic steel plate 4, the plate-shaped rotor core element 21 is punched from the strip-shaped electromagnetic steel plate 4.
Similar to the first embodiment, as illustrated in FIG. 1, when a plurality of stator core element laminated blocks 11LB are arranged in an annular shape to form the stator core 1, a large-diameter motor is more than a small-diameter motor. However, the accuracy of the stator core element laminated block 11LB is required. Very strict management is required for stacking and falling where the upper surface and the lower surface of the stator core element laminated block 11LB (see FIG. 4) are displaced. For example, one upper surface of adjacent stator core element laminated blocks 11LB is tilted in the outer diameter direction (for example, arrow A7 in FIG. 11 (b)), and the lower surface is tilted in the inner diameter direction (for example, arrow A8 in FIG. 11 (b)). Assuming that the upper surface of the other adjacent stator core element laminated blocks is tilted in the inner diameter direction and the lower surface is tilted in the outer diameter direction, the stator core element laminated blocks are aligned. Time (Fig. 11) becomes difficult to manage. Even if the stator core element laminated block 11LB is tilted in the circumferential direction, it becomes difficult to manage the alignment at the same time.
Therefore, in order to prevent the plate-shaped stator core element 11 from falling due to an impact due to dropping onto the floor where the manufacturing equipment is installed after punching from the strip-shaped electromagnetic steel plate 4, the strip-shaped stator core element 11 is formed by a press mechanism. When punching from the electromagnetic steel plate 4, the punched plate-shaped stator core element 11 is placed in the manufacturing equipment without adopting the step of dropping the punched plate-shaped stator core element 11 onto the floor where the manufacturing equipment is installed below. It is preferable to have a structure that receives it mechanically. If the orientations of the punched plate-shaped stator core elements 11 are not aligned, the machine in the manufacturing equipment must go to pick up the punched plate-shaped stator core elements 11 according to the orientation of each punched plate-shaped stator core element 11. It is expensive because it becomes complicated and large in scale.

In the present embodiment, since all the plate-shaped stator core elements 11 to be punched have the same direction and the same shape, the mechanical reception in the manufacturing apparatus is, for example, a press mechanism as illustrated in FIG. 5 of the first embodiment. The structure is such that the plate-shaped stator core element storage chambers 513, 523, ... Are provided directly under the female mold, and the manufacturing equipment can be constructed at low cost. Further, since the number of plate-shaped stator core elements 11 punched out from one strip-shaped electromagnetic steel plate 4 is large, traceability after discharge is difficult. If the plate-shaped stator core element 11 can be mechanically received, it is easy to tie the plate-shaped stator core element 11 to the subsequent packaging, which is advantageous for traceability.
Further, in the present embodiment, the material is taken efficiently in the second region 42 on the inner peripheral side and the first region 41 on the outer peripheral side of the plate-shaped rotor core element 21 in the electrical steel strip 4. Material is taken in. Since the directions of the yokes (teeth portions) of the plate-shaped rotor core element 21 punched from the strip-shaped electromagnetic steel plate 4 are all the same, the yoke of the stator core can align the motor radial direction and the rolling direction at the center of the teeth. When the width W14 ≤ core back width W15 × 2, the magnetic path can be optimized for all cores.

After that, the stator core element laminated block 11LB is added to the stator core element laminated block axial length adjusting mechanism 515, 525, 535, 545 (see FIGS. 5 and 6) in order to correct the axial length in the lamination direction. The dimensions are measured in a compressed state, and the number of laminated sheets is adjusted according to the dimensional results, and the shape is adjusted to match the shaft length of the rotary electric machine. In this structure, since the yoke and the material direction are all the same, the variation in the axial length in one core is constant, and it is easy to manage in the axial length straightening step.

As an application example of a large-diameter, permanent magnet-embedded motor, a motor is placed between the engine and transmission of an automobile, and the engine is started using the motor, or the kinetic energy of the automobile is regenerated as electrical energy by power generation. There is a hybrid system that assists the engine by generating torque. In such an application example, there is a strong demand for low vibration and low noise of the motor as well as high efficiency of the motor. However, if the iron core is manufactured by using the manufacturing method and the manufacturing apparatus of the present application, it is possible to realize not only high efficiency but also reduction of cogging torque, torque ripple, etc. due to the difference in magnetic anisotropy, and magnetic anisotropy. It is possible to reduce the electromagnetic excitation force having a low spatial order due to the above, and to obtain the effect of reducing the vibration and noise of the motor. Further, since the accuracy of the core is also improved, it is possible to obtain the effect of suppressing the vibration and noise of the motor caused by the deterioration of the shape accuracy.

Embodiment 3.
Hereinafter, the third embodiment will be described with reference to FIG.
As shown in FIG. 9, the plate-shaped rotor core element 21 constituting the rotor is manufactured by press punching from the strip-shaped electromagnetic steel plate 4, and the plate-shaped stator core element 11 is co-taken from the strip-shaped electromagnetic steel plate 4. Although not shown in the present embodiment, the plate-shaped rotor core element 21 is provided with a magnet hole for embedding a permanent magnet, as in the first embodiment (see FIG. 2). The plate-shaped stator core element 11 in the stator core element laminated block 11LB is crimped for fixing the plate-shaped stator core elements 11 to each other.

In the present embodiment, when one strip-shaped electromagnetic steel sheet is sequentially fed to the mold of the press mechanism of the manufacturing apparatus, it is punched out from the plate-shaped stator core element 11 as in the first embodiment. In the plate-shaped stator core element 11, the rolling direction of the strip-shaped electromagnetic steel sheet and the direction of the core back (arrow EDCB in FIG. 3) are the same. Since the direction of the core back of the split core is the same, it is possible to reduce the cogging torque caused by the difference in magnetic anisotropy due to the difference between the rolling direction and the orthogonal direction. The efficiency of the motor is improved because the direction with good magnetic characteristics can be used. The effect is obtained.

The stator core is not punched at the same time in consideration of product accuracy, but is punched in multiple times. After pulling out the stator core, punch out the rotor core. In the embodiment, the material is taken on the inner peripheral side and the outer circumference of the rotor core, and the material is taken efficiently. Since the direction of the teeth is perpendicular to the rolling direction, the influence of the plate thickness deviation in the circumferential direction on one core is small. Since a large-diameter motor is configured by arranging a large number of cores side by side, it is required to control the variation in the circumferential direction, so this embodiment is used.

Embodiment 4.
Hereinafter, the fourth embodiment will be described with reference to FIGS. 10 and 11.
As shown in FIG. 10, the rotor steel plate constituting the rotor is manufactured by press punching.
Compared with the first embodiment and the second embodiment described above, a plurality of plate-shaped stator cores are provided on both sides of the central axis CH21 of the plate-shaped rotor core element 21 parallel to the feeding direction of the strip-shaped electromagnetic steel plate 4. Since the element 11 is punched out from the strip-shaped electromagnetic steel plate 4 in a point-symmetrical manner with respect to the center of the plate-shaped rotor core element, the degree of freedom in product picking is increased, and the configuration is more advantageous for material picking.
Since the orientation of the teeth is constant as in the first and second embodiments, the cogging torque caused by the difference in magnetic anisotropy due to the difference between the rolling direction and the orthogonal direction can be reduced. Since the direction with good magnetic characteristics can be used, the effect of increasing the efficiency of the motor can be obtained.

In a large-diameter motor, a large number of cores having a large diameter are arranged in an annular shape to form a stator (see FIG. 1), so that the effect of tilting of the laminated core is greater than that of a small-diameter motor. The laminated core is constructed by stacking thin plates, and in order to improve the dimensional accuracy of the laminated core, the laminated cores are joined by a method such as caulking. Therefore, it is affected by caulking and the core collapses in one direction. This is called caulking (see FIG. 11).

In the present embodiment, since the material picking direction of the core is symmetrical with respect to the rolling direction as the central axis, the direction of core collapse is opposite between the symmetrical cores, and the influence of caulking can be canceled as the entire stator. In addition, the plate thickness deviation is averaged for the entire stator (see the alternate long and short dash line separated by the arrows in FIG. 10 (c)), and the influence of the plate thickness deviation can be reduced. This effect is most effective when the number of divided cores formed by the stator is a multiple of 4, for example, when the number of divided cores shown in FIG. 9 is used. The same effect can be obtained even if the position is symmetrical with respect to the central axis drawn at right angles to the rolling direction. As shown in FIG. 10B, the cross section of the strip-shaped electromagnetic steel sheet 4 in the direction perpendicular to the rolling direction becomes thicker toward the center of the direction perpendicular to the rolling direction of the strip-shaped electromagnetic steel sheet 4. There is.

Embodiment 5.
Hereinafter, the fifth embodiment will be described with reference to FIGS. 12 and 13.
As shown in FIG. 12, when the motor radial direction and the rolling direction at the center of the teeth are combined, the magnetic path can be optimized when the teeth width ≤ core back width × 2.

Since the tooth width ≤ core back width × 2, the magnetic flux density of the teeth is high and magnetic saturation is likely to occur. By matching the radial direction of the motor and the rolling direction at the center of the teeth, the magnetic characteristics of the direction of the magnetic flux density in the teeth are improved (the magnetic permeability is improved), so that the torque of the motor is improved.

The reason why the magnetic flux density of the teeth is high and magnetic saturation is likely to occur when the teeth width ≤ core back width × 2 will be described below. The magnetic flux of the teeth is divided into two at the core back. As illustrated in FIG. 13, the magnetic flux passing through the teeth is divided into two hands in the left-right direction at the core back portion. When the relationship of tooth width = core back width × 2 is established, if the magnetic flux density of the teeth is 2T (tesla), the magnetic flux is about 2T even if the magnetic flux is divided into two by the core back. Therefore, when the teeth width ≤ core back width × 2, the magnetic flux density in the teeth is high and magnetic saturation is likely to occur.

Embodiment 6.
Hereinafter, the sixth embodiment will be described with reference to FIG.
As shown in FIG. 14, when the motor circumferential direction and the rolling direction at the center of the teeth are combined, the magnetic path can be optimized when the teeth width> the core back width × 2.

Since the tooth width> the core back width × 2, the magnetic flux density of the core back is high and magnetic saturation is likely to occur. By matching the circumferential direction of the motor and the rolling direction at the center of the teeth, the magnetic characteristics of the direction of the magnetic flux density in the core back are improved (the magnetic permeability is improved), so that the torque of the motor is improved.

Embodiment 7.
Hereinafter, the seventh embodiment will be described with reference to FIG.
In the above-described first embodiment, the case where the plate-shaped stator core element 11 is punched from the strip-shaped electromagnetic steel plate 4 in the first to fourth punching steps is illustrated, but the plate-shaped stator core element punching target As _{illustrated in FIG. 15 illustrated by T P-1} and T _P-2 , even if the plate-shaped stator core element 11 is punched from the strip-shaped electromagnetic steel plate 4 in the first and second punching steps. Good.

The rolling direction A4M of the strip-shaped electromagnetic steel plate 4 and the extending direction of the teeth portion 11T when the stator core element laminated blocks 11LB in the above-described first, second, fourth, fifth, and seventh embodiments are incorporated in the rotary electric machine ( The relationship with the radial direction of the rotary electric machine is shown in FIG. 16 in the rolling direction A4M and the teeth portion of the strip-shaped electromagnetic steel plate 4 when the stator core element laminated block 11LB in the above-described embodiments 3 and 6 is incorporated in the rotary electric machine. The relationship between the 11T and the extending direction (the radial direction of the rotary electric machine) is illustrated in FIG.

From the viewpoint, the above-described embodiments 1 to 7 have the following characteristic items.
Feature 1:
It is a manufacturing method of a laminated core manufactured by loading an electromagnetic steel plate punched from a thin plate, and the stator core is formed by punching a rotor core and a stator core from the thin plate, and the stator core is composed of one tooth at a time. Since this is a method for manufacturing a laminated core, the yokes of the stator core are all in the same direction.
Cogging torque, torque ripple, etc. due to the difference in magnetic anisotropy due to the difference between the rolling direction and the orthogonal direction can be reduced. Since the direction with good magnetic characteristics can be used, the effect of high torque can be obtained. In addition, since all the punched cores can be discharged in the same shape and orientation, the discharge handling can be facilitated.
Feature 2:
In the manufacturing method of Feature 1, the orientation of the yoke of the stator core is symmetrical.
The effect of good material removal efficiency (good material yield) can be obtained, the effect of core caulking can be canceled, and the plate thickness deviation due to stacking can be prevented.
Feature 3:
In the manufacturing method of Feature 1, the motor radial direction and the material rolling direction at the center of the teeth of the stator core are the same.
Cogging torque, torque ripple, etc. due to the difference in magnetic anisotropy due to the difference between the rolling direction and the orthogonal direction can be reduced. Further, since the direction having good magnetic characteristics can be used, the torque can be improved and the efficiency of the motor can be improved.
Feature 4:
In the manufacturing method of Feature 3, the material for the stator core is taken into the rotor core, so that
The effect of improving the efficiency of material removal (good material yield) can be obtained by co-removal.
Feature 5:
In the manufacturing method of Feature 4, the material for the stator is taken from the material parts inside and outside the rotor core.
The effect of improving the efficiency of material removal (material yield is good) of the feature item 4 or more can be obtained.
Feature 6:
In the manufacturing method of Feature 1, the motor circumferential direction and the material rolling direction at the center of the teeth of the stator core are the same.
Cogging torque, torque ripple, etc. due to the difference in magnetic anisotropy due to the difference between the rolling direction and the orthogonal direction can be reduced. Further, since the direction having good magnetic characteristics can be used, the torque can be improved and the efficiency of the motor can be improved.
Feature 7:
In the manufacturing method of feature 3, a configuration was adopted in which the teeth of the stator core were such that the tooth width ≤ core back width × 2 when the motor radial direction and the rolling direction at the center of the teeth were matched.
The magnetic path can be optimized. Further, since the tooth width ≤ core back width × 2, the magnetic flux density of the teeth is high and magnetic saturation is likely to occur. Further, by matching the radial direction of the motor at the center of the teeth with the rolling direction, the magnetic characteristics in the direction of the magnetic flux density in the teeth are improved (the magnetic permeability is improved), so that the torque of the motor is improved.
Feature 8:
In the manufacturing method of feature 6, the structure is adopted so that the teeth of the stator core have the teeth width> core back width x 2 when the motor circumferential direction and the rolling direction at the center of the teeth are matched.
The magnetic path can be optimized. Further, since the tooth width> the core back width × 2, the magnetic flux density of the core back is high and magnetic saturation is likely to occur. Further, by matching the circumferential direction of the motor and the rolling direction at the center of the teeth, the magnetic characteristics in the direction of the magnetic flux density in the core back are improved (the magnetic permeability is improved), so that the torque of the motor is improved.
Feature 9:
Since the number of layers is adjusted by the shaft length correction process after lamination,
The core shaft length can be managed accurately.
Feature 10:
It is a manufacturing apparatus for manufacturing a laminated core manufactured by loading an electromagnetic steel plate punched from a thin plate, and the stator core formed by punching a rotor core and a stator core from the thin plate is 1. Since the stator cores are configured by teeth and the yoke directions are all the same.
Cogging torque and torque ripple caused by the difference in magnetic anisotropy due to the difference between the rolling direction and the orthogonal direction can be reduced. In addition, the torque of the motor increases because the direction with good magnetic characteristics can be used. In addition, since all the punched cores can be discharged in the same shape and orientation, the discharge handling can be facilitated.
Feature 11:
In the manufacturing apparatus of the feature item 10, since the yoke direction of the stator core is symmetrical,
In addition to the effect of the feature item 10, the effect of high material removal efficiency (good material yield) can be obtained.
Feature 12:
In the manufacturing apparatus of Feature 10, the motor radial direction and the material rolling direction at the center of the teeth of the stator core are the same.
The efficiency is improved by adjusting the shape of the stator core in the radial direction of the motor.
Feature 13:
In the manufacturing apparatus of the feature matter 12, since the material for the stator core is taken in the rotor core, the material is taken into the rotor core.
The effect of improving the efficiency of material removal (good material yield) can be obtained by co-removal.
Feature 14:
In the manufacturing apparatus of the feature item 13, since the material for the stator is taken from the material parts inside and outside the rotor core, the effect of improving the efficiency of material taking of the feature item 13 or more (the material yield is good) can be obtained. ..
Feature 15:
In the manufacturing apparatus of Feature 10, the motor circumferential direction and the material rolling direction at the center of the teeth of the stator core are the same.
Cogging torque and torque ripple caused by the difference in magnetic anisotropy due to the difference between the rolling direction and the orthogonal direction can be reduced. The efficiency of the motor is improved because the direction with good magnetic characteristics can be used.
Feature 16:
Since the number of layers is adjusted by the shaft length correction process after lamination,
The core shaft length can be managed accurately.
Feature 17:
It is a method of manufacturing a laminated core manufactured by loading an electromagnetic steel plate punched from a thin plate, and the stator core is formed by punching a rotor core and a stator core from the thin plate, and the stator core is composed of one tooth at a time. The teeth of the stator core is a rotary electric machine in which the radial direction of the motor at the center of the teeth and the rolling direction of the laminated core are matched.
Feature 18:
It is a method of manufacturing a laminated core manufactured by loading an electromagnetic steel plate punched from a thin plate, and the stator core is formed by punching a rotor core and a stator core from the thin plate, and the stator core is composed of one tooth at a time. The teeth of the stator core is a rotary electric machine in which the circumferential direction of the motor at the center of the teeth and the rolling direction of the laminated core are matched.

In each figure, the same sign indicates the same or corresponding part.
Although the present application describes various exemplary embodiments and examples, the various features, embodiments, and functions described in one or more embodiments are specific embodiments. It is not limited to the application of, but can be applied to the embodiment alone or in various combinations.
Therefore, innumerable variations not illustrated are envisioned within the scope of the techniques disclosed in the present application. For example, it is assumed that at least one component is modified, added or omitted, and further, at least one component is extracted and combined with the components of other embodiments.

1 Stator core, 11 plate-shaped stator core element, 11T teeth part, 11CB core back part, 11LB stator core element laminated block, 12 frames, 2 rotor cores, 21 plate-shaped rotor core elements, 211 holes for magnets 3, Rotating shaft, 4 strip electromagnetic steel plate, 41 1st region, 42 2nd region, A4 strip electromagnetic steel plate feeding direction, 5 manufacturing equipment, 50 strip electromagnetic steel plate flattening mechanism, 501 outer pilot pin, 502 inner pilot Pin, 51 1st press mechanism, 511 1st plate-shaped stator core element punching male mold, 512 1st plate-shaped stator core element punching female mold, 513 1st plate-shaped stator core Element storage chamber, 514 1st stator core element laminated block discharge port, 515 stator core element laminated block axial length adjustment mechanism, 52 2nd press mechanism, 521 2nd plate-shaped stator core element punching male Mold, 522 Second plate-shaped stator core element punched female mold, 523 Second plate-shaped stator core element storage chamber, 524 Second stator core element Laminated block outlet, 525 Stator core element Laminated block axial length adjustment mechanism, 53 3rd press mechanism, 531 3rd plate-shaped stator core element punching male mold, 532 3rd plate-shaped stator core element punching female mold, 533 3rd Plate-shaped stator core element storage chamber, 534 3rd stator core element laminated block discharge port, 535 stator core element laminated block axial length adjustment mechanism, 54 4th press mechanism, 541 4th plate-shaped fixing Child core element punched male mold, 542 4th plate-shaped stator core element punched female mold, 543 4th plate-shaped stator core element storage chamber, 544 4th stator core element laminated block discharge port , 545 Stator core element laminated block axial length adjustment mechanism, 55 fifth press mechanism, 551 fifth plate-shaped rotor core element punching male mold, 552 fifth plate-shaped rotor core element punching female Mold, 553 5th plate-shaped rotor core element storage chamber, 554 rotor core element laminated block outlet, 56 scrap cutting mechanism, 561 electromagnetic steel plate scrap cutting male mold, 562 electromagnetic steel plate scrap cutting female mold, 563 Cutting electromagnetic steel plate scrap storage chamber, 564 Cutting electromagnetic steel plate scrap discharge port, 525, 535, 545 Stator core element Laminated block Axial length Adjustment mechanism, A4M band-shaped electromagnetic steel sheet rolling direction, T _1-1 , T _1-2 , T _1-3 , T _1-4 , T _1-5 , T _1-6 , T _1-7 , T _1-8 , T _1-9 , T _1-10 , T _P-1 , T _P-2 Plate-shaped stator core element punching target.

Claims (19)

It is configured by connecting the stator core element laminated blocks formed by laminating the plate-shaped stator core elements formed in a T shape by the teeth portion and the core back portion in the axial direction in an annular shape in the circumferential direction. A method for manufacturing a laminated iron core of a rotary electric machine having a stator core formed by laminating an annular plate-shaped rotor core element in the axial direction and having a rotor core surrounded by the stator core.
A first region for punching the annular plate-shaped rotor core element of the strip-shaped electromagnetic steel plate before the step of punching the annular plate-shaped rotor core element from the strip-shaped electromagnetic steel plate formed by rolling by a pressing mechanism. enclosed inside of a disc-shaped second region is a plurality of the plate-shaped stator core elements, in about the striking抜工enough plurality of punching抜工of the plate-shaped rotor core element, before Symbol teeth to the extending direction of the radial direction of the rotary electric machine all parts to be the same direction, moreover, the plate-like stator core feeding direction of width or spacing of the elements with respect to feed direction of the strip magnetic steel While punching into the T-shape so that there is space
In the punching step of the plate-shaped stator core element, a plurality of the plate-shaped stator core elements are also provided from the first region outside the plate-shaped rotor core element, and the extending direction of the teeth portion is Punched into the T shape by the press mechanism so that they all have the same direction.
Moreover, in the punching step, the plurality of plate-shaped stator core elements punched in the T-shape within the disk-shaped second region and the first plate-shaped rotor core element outside the plate-shaped rotor core element. The plurality of plate-shaped stator core elements punched in the T-shape in the region are the Ts of the plurality of plate-shaped stator core elements punched in the T-shape in the disk-shaped second region. The orientation of the character shape and the T-shaped orientation of the plurality of plate-shaped stator core elements punched into the T-shape in the first region outside the plate-shaped rotor core element all have the same orientation. As described above, a method for manufacturing a laminated iron core of a rotary electric machine, which is characterized in that it is punched by the press mechanism. In the method for manufacturing a laminated iron core of a rotary electric machine according to claim 1,
Each time the plate-shaped stator core element is punched from the strip-shaped electromagnetic steel plate, the punched plate-shaped stator core element is individually fixed in a plate shape in a direction perpendicular to the feeding direction of the strip-shaped electromagnetic steel plate. A method for manufacturing laminated steel cores of a rotating electric machine, which is characterized by accumulating in a child core element storage chamber. In the method for manufacturing a laminated iron core of a rotary electric machine according to claim 1,
Lamination of rotary electric machines, characterized in that the extending direction of the teeth portion of each of the plate-shaped stator core elements punched from the strip-shaped electromagnetic steel plate is the same as the rolling direction of the strip-shaped electromagnetic steel plate. Iron core manufacturing method. In the method for manufacturing a laminated iron core of a rotary electric machine according to claim 1,
A rotary electric machine characterized in that the extending direction of each of the teeth portions of the plate-shaped stator core element punched from the strip-shaped electromagnetic steel plate is perpendicular to the rolling direction of the strip-shaped electromagnetic steel plate. Laminated steel core manufacturing method. In the method for manufacturing a laminated iron core of a rotary electric machine according to claim 1,
Positions of the plurality of plate-shaped stator core elements punched in the T-shape in the inner disc-shaped second region surrounded by the first region for punching the annular plate-shaped rotor core element. The relationship is that the plurality of the plate-shaped stator core elements near the center of the annular plate-shaped rotor core element, and the plurality of the plate-shaped stator core elements near the center and the annular plate-shaped rotor. A method for manufacturing a laminated iron core of a rotary electric machine, which is located between the core element and has a positional relationship between a plurality of the plate-shaped stator core elements surrounding the plurality of plate-shaped stator core elements in the vicinity of the center. .. In the method for manufacturing a laminated iron core of a rotary electric machine according to claim 1,
A plurality of the plate-shaped stator core elements on both sides of the central axis of the annular plate-shaped rotor core element parallel to the feeding direction of the strip-shaped electromagnetic steel plate form the annular plate-shaped rotor core element. A method for manufacturing a laminated iron core of a rotary electric machine, characterized in that the strip-shaped electromagnetic steel plate is punched out point-symmetrically with respect to the center of the above. In the method for manufacturing a laminated iron core of a rotary electric machine according to claim 3.
In the plate-shaped stator core element, the relationship between the tooth width in the circumferential direction of the rotary electric machine of the teeth portion and the radial core back width of the rotary electric machine of the core back portion is the relationship of the teeth width ≤ core back width ×. A method for manufacturing a laminated iron core of a rotary electric machine, characterized in that punching from the strip-shaped electromagnetic steel plate is performed so as to be 2. In the method for manufacturing a laminated iron core of a rotary electric machine according to claim 4.
In the plate-shaped stator core element, the relationship between the circumferential tooth width of the rotary electric machine of the teeth portion and the radial core back width of the rotary electric machine of the core back portion is such that the teeth width> the core back width ×. A method for manufacturing a laminated iron core of a rotary electric machine, characterized in that punching from the strip-shaped electromagnetic steel plate is performed so as to be 2. In the method for manufacturing a laminated iron core of a rotary electric machine according to any one of claims 1 to 8.
It is necessary to adjust the axial length of the plate-shaped stator core element punched from the strip-shaped electromagnetic steel plate and stored in the plate-shaped stator core element storage chamber before assembling into the stator core. A characteristic method for manufacturing laminated iron cores of rotary electric machines. It is configured by connecting the stator core element laminated blocks formed by laminating the plate-shaped stator core elements formed in a T shape by the teeth portion and the core back portion in the axial direction in an annular shape in the circumferential direction. It is a laminated iron core manufacturing apparatus of a rotary electric machine having a stator core formed by laminating an annular plate-shaped rotor core element in the axial direction and having a rotor core surrounded by the stator core.
Before the step of punching the annular plate-shaped rotor core element from the strip-shaped electromagnetic steel plate formed by rolling, the strip-shaped electromagnetic steel plate is surrounded by a first region for punching the annular plate-shaped rotor core element. inside the disk-shaped second region, a plurality of the plate-shaped stator core elements, in about the striking抜工enough plurality of punching抜工of the plate-shaped rotor core element, the pre-Symbol teeth Make sure that all the radial extending directions of the rotor are the same , and that there is a space greater than or equal to the width of the plate-shaped stator core element in the feeding direction with respect to the feeding direction of the strip-shaped electromagnetic steel plate. Also equipped with a press mechanism that punches into the T shape.
In the punching step of the plate-shaped stator core element, the press mechanism causes a plurality of the plate-shaped stator core elements from the first region outside the plate-shaped rotor core element to the teeth portion. Punch into the T shape so that all the extending directions are the same direction.
Moreover, the press mechanism is outside the plurality of plate-shaped stator core elements and plate-shaped rotor core elements punched in the T-shape within the disk-shaped second region in the punching step. A plurality of the plate-shaped stator core elements punched into the T-shape in the first region of the above, and a plurality of the plate-shaped stators punched into the T-shape in the disk-shaped second region. The T-shaped orientation of the core element and the T-shaped orientation of the plurality of plate-shaped stator core elements punched into the T-shape in the first region outside the plate-shaped rotor core element. A laminated iron core manufacturing device for rotary electric machines, which is characterized by punching all in the same direction. In the laminated iron core manufacturing apparatus of the rotary electric machine according to claim 10.
Each time the plate-shaped stator core element is punched from the strip-shaped electromagnetic steel plate, the punched plate-shaped stator core element is individually accumulated in a direction perpendicular to the feeding direction of the strip-shaped electromagnetic steel plate. A laminated steel core manufacturing apparatus for a rotating electric machine, which is characterized by having a shape stator core element storage chamber. In the laminated iron core manufacturing apparatus of the rotary electric machine according to claim 10.
The plate-shaped stator core element from the strip-shaped electromagnetic steel plate so that the extending direction of each of the teeth portions of the plate-shaped stator core element to be punched is the same direction as the rolling direction of the strip-shaped electromagnetic steel plate. A laminated iron core manufacturing apparatus for a rotary electric machine, characterized in that it is equipped with a press mechanism for punching a plurality of pieces in a plurality of punching processes. In the laminated iron core manufacturing apparatus of the rotary electric machine according to claim 10.
From the strip-shaped electromagnetic steel plate to the plate-shaped stator so that the extending direction of the teeth portion of each of the plate-shaped stator core elements to be punched is perpendicular to the rolling direction of the strip-shaped electromagnetic steel plate. A machine for manufacturing laminated iron cores of a rotary electric machine, which is provided with a press mechanism for punching a plurality of core elements in a plurality of punching processes. In the laminated iron core manufacturing apparatus of the rotary electric machine according to claim 10.
A laminated iron core manufacturing apparatus for a rotary electric machine, characterized in that the plate-shaped stator core element is provided with a press mechanism for punching the plate-shaped stator core element from the four corners of the first region outside the annular plate-shaped rotor core element. In the laminated iron core manufacturing apparatus of the rotary electric machine according to claim 10.
A plurality of the plate-shaped stator core elements are formed on both sides of the central axis of the annular plate-shaped rotor core element parallel to the feeding direction of the strip-shaped electromagnetic steel plate, and the annular plate-shaped rotor core element is formed. A laminated iron core manufacturing apparatus for a rotary electric machine, characterized in that it is provided with a press mechanism for punching from the strip-shaped electromagnetic steel plate in a point-symmetrical manner with respect to the center of the above. In the laminated iron core manufacturing apparatus of the rotary electric machine according to claim 12.
Regarding the plate-shaped stator core element, the relationship between the tooth width in the circumferential direction of the rotary electric machine of the teeth portion and the radial core back width of the rotary electric machine of the core back portion is the teeth width ≤ core back width ×. A laminated iron core manufacturing apparatus for a rotary electric machine, characterized in that it is provided with a press mechanism for punching from the strip-shaped electromagnetic steel plate so as to be 2. In the laminated iron core manufacturing apparatus of the rotary electric machine according to claim 13.
Regarding the plate-shaped stator core element, the relationship between the tooth width in the circumferential direction of the rotary electric machine in the teeth portion and the radial core back width of the rotary electric machine in the core back portion is: tooth width> core back width × A laminated iron core manufacturing apparatus for a rotary electric machine, characterized in that it is provided with a press mechanism for punching from the strip-shaped electromagnetic steel plate so as to be 2. In the laminated iron core manufacturing apparatus of the rotary electric machine according to claim 10.
A laminated iron core manufacturing apparatus for a rotary electric machine, characterized in that the directions of the teeth portions of the plate-shaped stator core elements punched by the press mechanism are all in the same direction as the rolling direction of the strip-shaped electromagnetic steel sheet. In the laminated iron core manufacturing apparatus for a rotary electric machine according to any one of claims 10 to 18.
Plate-shaped stator core element punched out from the strip-shaped electromagnetic steel plate The axial length of the plate-shaped stator core element accumulated in the storage chamber of the rotary electric machine is set in the stator core element before being assembled to the stator core. Laminated block A laminated iron core manufacturing device for rotary electric machines, which is characterized by being adjusted by an axial length adjustment mechanism.

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