JP2017195669A - Laminated iron core of rotary electric machine and manufacturing machine thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminated iron core of rotary electric machine capable of preventing cogging torque, noise, vibration etc. due to degradation of core accuracy which is generated by accumulated deviation on a plate thickness.SOLUTION: A laminated iron core 10 includes plural steel plates 9, in which the plate thickness is different from each other in both ends in a direction perpendicular to a rolling direction, are laminated after being punched out in a required shape. Each of the steel plates 9 has an identical rolling direction being laminated so that the sides having the larger plate thickness are abutted on each other, and the sides having the smaller plate thickness are abutted on each other. A difference in height at both sides of the laminated iron core 10 is eliminated by interposing an iron core member 11 having a projection 13 at the side with a smaller plate thickness between predetermined number of laminated plainer iron core members 12.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a laminated iron core of a rotary electric machine such as a motor, for example, and particularly to improve the core accuracy of the laminated iron core.

  An electromagnetic steel sheet is manufactured by cold rolling, but due to a mismatch in inclination between rolling rolls and elastic deformation, a difference occurs in the thickness of both end portions in a direction perpendicular to the rolling direction. Although the difference in plate thickness is as small as about several μm, since the iron core of the motor stacks a plurality of such thin plates, the difference in plate thickness is accumulated. In recent years, in order to increase the efficiency, motor steel sheets have been made thinner and the number of stacked sheets has increased. Therefore, accumulation of the difference in plate thickness deteriorates the core accuracy, which is a factor in generating cogging torque, noise, vibration, and the like.

  In Patent Document 1, two types of connecting unit plates whose directions are forward and reverse are punched, and the other connecting unit plates are stacked in a state in which one connecting unit plate is rotated 180 degrees for each predetermined number of sheets. Has been disclosed. Thereby, the plate | board thickness deviation produced along the width direction of a rolled steel plate is canceled, and it becomes possible to obtain the unit laminated body of uniform stacking thickness.

Japanese Patent Laid-Open No. 9-2106020

  As described above, the conventional laminated iron core is provided with a portion for punching two kinds of cores having different directions by 180 degrees in the mold, and the die thickness direction is reversed by rotating the mold die by 180 degrees. By laminating two types of steel plates, the difference in plate thickness is offset. Therefore, a complicated mechanism is required, and it is necessary to process the mold so that the two types of shapes coincide with each other, resulting in an increase in cost.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a laminated iron core and a manufacturing apparatus thereof that can easily improve core accuracy.

  A laminated iron core of a rotating electrical machine according to the present invention is formed of a plurality of iron core members punched from steel plates having different thicknesses at both ends in a direction perpendicular to the rolling direction, and the plate thickness is large. In the laminated iron core of the rotating electrical machine formed so that the sides and the small sides overlap with each other, an iron core member having a protrusion is interposed between a predetermined number of laminated plate-like iron core members, thereby the laminated iron core. The difference in height between the two sides is prevented from occurring.

  According to the laminated iron core of the rotating electrical machine configured as described above, since the iron core member having the protrusions is interposed between the flat-plate iron core members laminated in a predetermined number, the core due to the difference in plate thickness The deterioration of accuracy can be improved.

FIG. 3 is a perspective view showing a laminated iron core in the first embodiment. It is sectional drawing which follows the AA line in FIG. 5 is a front view showing a manufacturing process of the laminated iron core in the first embodiment. FIG. It is a top view which shows the metal mold | die which punches a laminated iron core. It is sectional drawing which follows the BB line in FIG. It is a top view which shows another metal mold | die which punches a laminated iron core. It is sectional drawing which shows a laminated iron core. It is a top view which shows another metal mold | die which punches a laminated iron core. FIG. 5 is a cross-sectional view showing a laminated iron core in a second embodiment. It is sectional drawing which shows the metal mold | die which punches the laminated iron core in Embodiment 2. FIG. FIG. 6 is a cross-sectional view showing a laminated iron core in a third embodiment. FIG. 10 is a cross-sectional view showing a laminated iron core in a fourth embodiment. It is a top view which shows the metal mold | die which punches the laminated iron core in Embodiment 4. FIG.

Embodiment 1 FIG.
The first embodiment will be described below with reference to the drawings. 1 is a perspective view showing a configuration of a laminated iron core 10 according to Embodiment 1, and FIG. 2 is a cross-sectional view taken along line AA in FIG. The laminated iron core 10 is obtained by fixing and laminating iron core members 11 and 12 obtained by punching steel plates 9 having different thicknesses at both ends in a direction perpendicular to the rolling direction into a necessary shape so as not to be displaced. And each steel plate 9 is laminated | stacked in the state in which the rolling direction corresponded, and is laminated | stacked so that the sides with a large board thickness may overlap each other. In FIG. 2, the left side is the side with the larger plate thickness, and the right side is the side with the smaller plate thickness. A method for fixing the steel plate 9 after punching will be described later. The iron core member 11 has a protrusion 13 on the side of the steel plate 9 where the thickness is small. The iron core member 12 has no projection 13 and is formed in a flat plate shape. In the laminated iron core 10, iron core members 11 and 12 are alternately laminated every predetermined number of sheets. FIG. 2 illustrates a structure in which three iron core members 12 are laminated and then one iron core member 11 is laminated, and this is repeated thereafter. A lamination method other than that shown in FIG. The left-side height H1 and the right-side height H2 are configured to be the same.

  FIG. 3 is a front view showing a manufacturing process of the laminated iron core 10 in FIG. 4 is a plan view showing a mold for punching a laminated iron core, and FIG. 5 is a sectional view taken along line BB in FIG. 3, in this manufacturing process, in addition to the mold 14, an uncoiler 15 that unwinds the electromagnetic steel sheet wound in a circular shape, a leveler feeder 16 that corrects the winding of the steel sheet 9 and supplies it to the mold 14, rolling A plate thickness measuring device 17 that measures a plate thickness in a direction perpendicular to the direction and a steel plate winding device 18 that winds the steel plate 9 after punching are provided.

  The mold 14 will be described with reference to FIGS. The mold 14 has a lower mold 19 and an upper mold 21 that is guided by a guide pole 20 and can move in the vertical direction. The upper die 21 has a pin protrusion amount switching member 22 that slides and moves in the horizontal direction within the upper die 21, and the pin protrusion amount switching member 22 has a different depth on the surface facing the lower die 19. A hole 23 and a hole 31 are formed. The pin member 24 penetrates the upper die 21 so as to slide, and is always pressed against the lower die 19 by the spring member 25. The upper end 26 of the pin member 24 is arranged so as to correspond to the position where the holes 23 and 31 of the pin protrusion amount switching member 22 exist. Further, the lower end 27 penetrates the steel plate pressing plate 28 and is arranged so as to half-cut the protrusion 13 at a predetermined position of the steel plate 9 arranged between the steel plate pressing plate 28 and the lower mold 19.

  Next, the manufacturing method of the laminated iron core 10 comprised as mentioned above is demonstrated. First, the steel plate 9 is sent out with the leveler feeder 16 correcting the winding. Next, the plate thickness measuring device 17 measures the plate thickness in the direction perpendicular to the rolling direction of the steel plate 9. The number of iron core members 11 having protrusions 13 and iron core members 12 having no protrusions is calculated based on the measurement results of the sheet thicknesses by a not-shown arithmetic unit based on the measurement results of the thicknesses of the laminated iron cores 10. To do. On the basis of the calculation result, the protrusion 13 is formed by half blanking. And the steel core members 11 and 12 are formed by punching the steel plate 9 into a necessary shape by a punching die (not shown).

  Moreover, after punching, the iron core members 11 and 12 are fixed. Any fixing method may be used. For example, a laser welding apparatus may be incorporated in the mold 14 and fixed by welding from the outside of the iron core members 11 and 12. Moreover, after taking out from the metal mold | die 14, you may align and fix by welding. Further, a resin such as an adhesive or varnish may be applied and fixed between the steel plates. Also in this case, there are a method of applying an adhesive before punching with a mold and laminating in the punching mold, a method of punching out from the mold and laminating by applying an adhesive one by one with a separate apparatus, etc. is there.

  Next, the operation of the mold 14 will be described with reference to FIGS. When the steel plate 9 is supplied, the pin protrusion amount switching member 22 moves the hole 23 of the pin protrusion amount switching member 22 to the corresponding position of the pin member 24 when the protrusion 13 is formed. The steel plate pressing plate 28 is lowered by a mechanism (not shown), and the steel plate 9 is pressed against the upper surface of the lower mold 19. Then, the upper mold 21 is lowered. The lower end 27 of the pin member 24 contacts the upper surface of the steel plate 9 placed on the upper surface of the lower mold 19. When the upper die 21 is further lowered, the spring member 25 contracts due to the pressing force from the upper die 21, the upper end 26 of the pin member 24 enters the hole 23 of the pin protrusion amount switching member 22, and the tip of the upper end 26 is the hole. 23 is in contact with the bottom surface. At this time, the pressing force of the upper die 21 is directly applied to the lower end 27 of the pin member 24 via the upper end 26, and the projection 13 is formed on the steel plate 9 by the force.

  When the protrusion 13 is not formed, the hole 31 of the pin protrusion amount switching member 22 moves to the corresponding position of the pin member 24. Similarly to the above, the steel plate presser plate 28 is lowered by a mechanism (not shown), and the steel plate 9 is pressed against the upper surface of the lower mold 19. Then, the upper die 21 is lowered, the spring member 25 contracts due to the pressing force, and the upper end 26 of the pin member 24 enters the hole 31 of the pin protrusion amount switching member 22. However, in this case, the depth of the hole 31 is deeper than that of the hole 23, and the upper end 26 of the pin member 24 does not contact the bottom surface of the hole 31. Therefore, the pressing force of the upper die 21 is not transmitted to the steel plate 9 on the steel plate 9, and the protrusion 13 is not formed on the steel plate 9. Although a pressing force corresponding to the contraction of the spring member 25 is applied to the steel plate 9, the projection 13 is not formed because the force of the spring member 25 is set to such an extent that the steel plate 9 is not deformed.

  Next, a method of adjusting using the protrusions 13 will be described in order to cope with the deterioration of the core accuracy generated in the laminated iron core 10 in which the steel plates 9 having different thicknesses are laminated in the direction perpendicular to the rolling direction. The height h of the protrusion 13 (see FIG. 2) varies depending on the amount of protrusion of the lower end 27 of the pin member 24 from the lower surface of the steel plate pressing plate 28. When the deviation amount Δt of one sheet thickness in the direction perpendicular to the rolling direction measured by the sheet thickness measuring device 17 and the height h of the protrusion 13 are the same, only the iron core member 11 on which the protrusion 13 is formed is laminated. If so, the core accuracy can be improved. However, since the deviation amount Δt of the plate thickness fluctuates, it rarely coincides with the height h of the protrusion 13. The greater the difference between the thickness deviation Δt and the height h of the protrusion 13, the smaller the effect of improving the core accuracy. Further, since the deviation amount Δt of the plate thickness is about several μm, it is difficult to accurately form the height h of the protrusion 13 in accordance with the deviation amount Δt, and the protrusion 13 is larger than the deviation amount Δt of the normal plate thickness. The height h becomes higher.

  Therefore, the number of iron core members 11 having protrusions 13 and the number of iron core members 12 having no protrusions are adjusted in accordance with the deviation amount Δt of one sheet thickness and the height h of the protrusions 13 to obtain n sheets. The total number of combinations of the iron core member 11 and the iron core member 12 is adjusted so that the total thickness deviation nΔt of the steel plates and the height h of the protrusions 13 match as much as possible. By doing so, the deviation amount Δt of the plate thickness can be canceled and the core accuracy can be improved. In addition, it is desirable that the total amount nΔt of thickness deviations and the height h of the projections 13 be matched, but even if they are slightly deviated, the effect is obtained, so selection is made in combination with other factors such as economy.

  In the description so far, the case where the thin plate side is generated on the same side in all the steel plates 9 has been described. However, depending on the steel plate 9, the thin plate side may be the opposite side. In order to correspond to two steel plates 9 with different thicknesses, a pin structure is formed in which two pin members 24 are arranged, one at each end, and two pins are arranged. The member 24 may be used by switching. As a device configuration that further increases the degree of freedom of adjustment, a plurality of holes 23 having different depths can be prepared in the pin protrusion amount switching member 22 and can be switched and punched according to the thickness deviation amount Δt. When the deviation amount is small, adjustment is performed using a deep hole, and when the deviation amount is large, adjustment is performed using a shallow hole.

  Still another adjustment method will be described below. FIG. 6 is a plan view showing another mold for punching a laminated iron core. As shown in the figure, by arranging a plurality of pin members 24 in the upper die 21 in a direction perpendicular to the rolling direction, diversity of locations where the protrusions 13 are provided can be achieved. For example, as shown in FIG. 7, when the protrusion 13 is provided on the inner side of the steel plate 9 in a direction perpendicular to the rolling direction, the amount of deviation at that position is small, so the number of iron core members 11 having the protrusion 13 is reduced. be able to. On the contrary, when the protrusions 13 are provided on the outer side, the deviation amount at the position is large, so that the number of the iron core members 11 having the protrusions 13 is increased. By doing in this way, the freedom degree of the adjustment method can be raised. Here, as the shape of the protrusion 13, various shapes such as a columnar shape, a hemispherical shape, and a V-shape are conceivable, and any protrusion shape may be used as long as it can be stably formed.

  As described above, according to the first embodiment, as shown in FIG. 2, the protrusion 13 having the height h is provided on the side where the plate thickness is small, between several laminated iron core members 12 having no protrusion. The iron core member 11 is interposed. Therefore, when only the iron core member 12 is laminated, a difference can be made between the thick side and the small side, whereas a gap D is formed at a place where the iron core member 11 is interposed as shown in FIG. Thus, the difference in the laminated thickness can be adjusted, and the laminated thicknesses H1 and H2 can be made the same, so that the core accuracy can be improved. In FIG. 2, black portions indicate gaps.

  In the present embodiment, the case where there is one protrusion 13 in the rolling direction for each iron core member has been described, but a plurality of protrusions 13 may be provided in the rolling direction. If the depths of the plurality of protrusions 13 can be manufactured uniformly, each iron core member can be held at a plurality of points, so that the core accuracy in the rolling direction can be increased. However, since the pin protrusion amount switching member 22 and the pin member 24 have a certain size, when a small-sized iron core member is formed, a plurality of pins may not be arranged. Therefore, for example, as shown in FIG. 8, two stages 100 and 101 for forming the protrusion 13 may be provided, and the pin member 24 may be disposed on each of them. However, the increase in the size of the mold 14 may increase the cost, and a device for processing the height of the protrusion 13 uniformly is required. From the above, it is better to select suitable conditions from the viewpoint of necessary core accuracy and investable equipment costs.

Embodiment 2. FIG.
FIG. 9 is a cross-sectional view showing the laminated iron core in the second embodiment, and corresponds to FIG. 2 in the first embodiment. The iron core member 32 is provided with a projection (first projection) 33 on the side of the steel plate having a small thickness and a projection (second projection) 34 on the side of the steel plate having a large thickness. The height is larger than the height of the protrusion 34. The laminated iron core 10 is obtained by alternately laminating iron core members 32 and a predetermined number of iron core members 12 without protrusions.

  FIG. 10 is a cross-sectional view showing a mold 14 according to the second embodiment. The basic structure of the mold is the same as that of the first embodiment, and has a lower mold 19 and an upper mold 21 guided by a guide pole 20, and a protruding amount of a pin that moves by sliding in the upper mold 21 in the lateral direction. A switching member 22 is provided, and a pin member 24 that is pressed in the direction of the lower mold 19 by a spring member 25 is provided. The upper end 26 of the pin member 24 is disposed so as to correspond to the position where each hole of the pin protrusion amount switching member 22 exists. Further, the lower end 27 penetrates the steel plate pressing plate 28, and the protrusion 13 is half-punched at a predetermined position of the steel plate 9 disposed between the steel plate pressing plate 28 and the lower mold 19.

  The difference from the first embodiment is that two pin members 24 are provided in a direction perpendicular to the rolling direction. Further, the pin protrusion amount switching member 22 has a hole 51 corresponding to the protrusion 33 and a hole 52 corresponding to the protrusion 34, and the number of holes 31 is increased by the increase of the pin member 24. The depth of the hole 52 is larger than the depth of the hole 51. Further, since the pin protrusion amount switching member 22 and the pin member 24 have a certain size, there are cases where a plurality of pin members 24 cannot be arranged when a small iron core member is created. In this case, the stage for forming the protrusion 13 may be divided into two, and the pin member 24 may be disposed on each of the stages. However, there is a disadvantage that the mold itself becomes large.

When forming the protrusions 33 and 34, the holes 51 and 52 of the pin protrusion amount switching member 22 are moved to positions corresponding to the upper ends 26 of the two pin members 24. When the projections 33 and 34 are not formed, the hole 31 is moved to the corresponding position. The depth of the hole 31 is deep, and the upper end 26 of the pin member 24 does not contact the bottom surface of the hole 31. Therefore, the pressing force of the upper die 21 is not transmitted to the steel plate 9, and the protrusions 33 and 34 are not formed on the steel plate 9.
By moving the pin protrusion amount switching member 22 as described above, the iron core member 32 with the protrusions 33 and 34 and the iron core member 12 without the protrusion are manufactured, and the iron core member so as to offset the deviation amount of the plate thickness. 32 and the iron core member 12 are combined and laminated.

As described above, according to the second embodiment, the protrusion 33 having a high height is provided on the side where the plate thickness is thin between the several laminated iron core members 12 having no protrusion, and the plate on the side where the plate thickness is thick. Is an iron core member 32 provided with a projection 34 having a low height. Therefore, when only the iron core member 12 is laminated, a difference can be made between the large thickness side and the small thickness side, whereas in the present embodiment, the gap E is formed at the place where the iron core member 32 is interposed. The difference in stacking thickness is adjusted, and as a whole there is no difference in height between both ends, so that the core accuracy can be improved.
Further, the amount of deviation of the thickness of the steel sheet is finely adjusted by the difference between the protrusions 33 and 34, and the overall height can be made the same, so that further fine adjustment is possible than in the case of the first embodiment. Core accuracy can be improved. In the second embodiment, the iron core member 32 having protrusions and the iron core member 12 without protrusions are alternately laminated every predetermined number. However, even if only the iron core members 32 are laminated, the same effect can be obtained. Can do.

Embodiment 3 FIG.
FIG. 11 is a cross-sectional view showing laminated iron core 10 according to the third embodiment, and corresponds to FIG. 2 according to the first embodiment. The iron core member (third iron core member) 35 is provided with a protrusion (third protrusion) 63 on the side where the plate thickness of the steel plate is small, and the iron core member (fourth iron core member) 36 is made of a steel plate. A protrusion (fourth protrusion) 64 is provided on the thicker side. The height of the protrusion 63 is larger than the height of the protrusion 64. The laminated iron core 10 is obtained by interposing iron core members 35 and 36 between a predetermined number of laminated iron core members 12 without protrusions.

  According to this embodiment, the iron core member 35 without a protrusion is stacked in a predetermined number, and the iron core member 35 provided with the protrusion 63 having a high height on the side where the plate thickness is thin, and the plate thickness is thick. An iron core member 36 provided with a protrusion 64 having a low height on the side is interposed. Accordingly, when only the iron core member 12 is laminated, a difference can be made between the thick side and the small side, whereas a gap F is formed at the place where the iron core member 35 is interposed, and the iron core member 36 is interposed. The gap G can be formed in the place where it was made to. Thus, by combining the gaps F and G having different heights, the difference in stacking thickness can be adjusted and the stacking thickness can be made the same at both ends, so that the core accuracy can be improved.

  Further, in the second embodiment, since the two protrusions are provided on one iron core member, the processing accuracy of the protrusions is adjusted so that the height difference × number of the two protrusions exactly matches the deviation amount. In contrast, in the third embodiment, since the number of left and right protrusions can be freely changed, the combination of the number of left and right protrusions can be adjusted according to the processing state of the protrusion. There is an effect that the machining accuracy is lower than that of the second embodiment. In the third embodiment, the configuration of the mold may be the same as the configuration shown in FIG. 10, or the stage may be divided separately as shown in FIG.

Embodiment 4 FIG.
FIG. 12 is a cross-sectional view showing laminated iron core 10 according to the fourth embodiment, and corresponds to FIG. 2 according to the first embodiment. The iron core member (fifth iron core member) 41 has a protrusion (fifth protrusion) 42 on the side of the steel plate 9 where the plate thickness is small. An iron core member (sixth iron core member) 43 is disposed below the iron core member 41 in the stacking direction, and a protrusion (sixth protrusion) 44 having a diameter larger than that of the protrusion 42 is provided at a position corresponding to the protrusion 42. Have. Below that, an iron core member (seventh iron core member) 45 is provided, and has a projection 46 and a hole 46 having a diameter larger than that of the projection 44 at a position corresponding to the projection 44.

  In addition to the iron core members 41, 43, 45, a flat iron core member 12 having no protrusion is used. Since the height h3 of the protrusion 42 is larger than the height h4 of the protrusion 44, a gap G is generated between the iron core member 41 and the iron core member 43 by the height difference. The depth of the hole 46 is larger than the height h4 of the protrusion 44. The iron core member 41 is formed by combining the iron core member 41, the iron core member 43, and the iron core member 45. The iron core member 50 has a height on the side where the protrusions are increased by the difference in height between the protrusions of the iron core member 41 and the iron core member 43. The laminated iron core 10 is obtained by laminating a predetermined number of combination iron core members 50 and iron core members 12.

  FIG. 13 is a plan view showing a mold according to the fourth embodiment. The basic structure of the mold is the same as in the first embodiment. In the present embodiment, two stages 401 and 402 having a pin member 24 for processing a protrusion are provided, and a stage for punching a hole 46 (not shown) is further provided. Protrusions 42, protrusions 44, and holes 46 are formed in the steel plate 9 at each stage, and the steel plate 9 is punched out at each position by a punching die (not shown) to form iron core members 41, 43, and 45. The iron core member 50 is formed.

  According to the fourth embodiment, the iron core member 43 having the projection 44 having a diameter smaller than that of the hole 46 is disposed on the iron core member 45 provided with the hole 46. An iron core member 41 having a protrusion 42 having a diameter smaller than that of the protrusion 44 is disposed on the protrusion 42, and a combined iron core member 50 having a height higher than that of the protrusion 44 is formed. And since the iron core member 50 is interposed between the iron core members 12 having no protrusions and a predetermined number of layers, when only the iron core member 12 is laminated, the plate thickness at both ends of the iron core member. On the other hand, a large side and a small side are generated, whereas in this embodiment, the combination iron core member 50 having an increased laminated thickness is interposed on the side where the plate thickness is small, and therefore the gap G can be generated. Therefore, since the difference in the laminated thickness can be adjusted and the laminated thickness can be made the same on both sides of the iron core member, the core accuracy can be improved.

In the fourth embodiment, the combination iron core members 50 and the iron core members 12 having no protrusions are alternately stacked every predetermined number. However, the heights of the protrusions 42 and the protrusions 44 are offset so as to cancel out the deviation of the plate thickness. If only the iron core member 50 is laminated, the same effect can be obtained.
There is also a method of adjusting the difference in sheet thickness by caulking the iron core members and changing the caulking height, but the parts not covered with the insulating coating are in contact with each other, and eddy current is generated. There is a risk of reducing the efficiency of the rotating electrical machine. In this embodiment, since the diameters of the protrusions 42, the protrusions 44, and the holes 46 are set so as not to contact each other, the portions that are not covered with the insulating coating do not contact each other, and the effect of reducing the reduction in efficiency of the rotating electrical machine can be achieved. Have.
It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

  9 Steel plate, 10 Laminated iron core, 11, 12, 35, 36, 41, 43, 45 Iron core member, 13, 33, 34, 42, 44 Protrusion, 14 Mold, 17 Plate thickness measuring device, 46 holes.

Claims (6)

It is formed from a plurality of iron core members punched from steel plates having different thicknesses at both ends in a direction perpendicular to the rolling direction, and is formed so that the large side and the small side overlap each other. In the laminated iron core of
A rotating electric machine characterized in that a difference in height is prevented from occurring on both sides of the laminated iron core by interposing an iron core member having a protrusion between flat iron core members laminated in a predetermined number. Laminated iron core. 2. The laminated iron core for a rotating electrical machine according to claim 1, wherein the protrusion is provided on the side having a small plate thickness. A first protrusion is provided on the small thickness side and a second protrusion is provided on the large thickness side, and the height of the first protrusion is greater than the height of the second protrusion. A laminated iron core for a rotating electrical machine according to claim 1. A third iron core member having a third protrusion provided on the side having a small plate thickness and a fourth iron core member having a fourth protrusion provided on the side having a large plate thickness are interposed, and the third iron member is interposed. The laminated iron core for a rotating electrical machine according to claim 1, wherein a height of the protrusion is larger than a height of the fourth protrusion. A fifth iron core member provided with a fifth protrusion on the side having the smaller plate thickness;
A sixth projection that is disposed on the lower side in the stacking direction of the fifth iron core member and has a diameter larger than that of the fifth projection and smaller in height is provided at a position corresponding to the fifth projection. A sixth iron core member;
A seventh iron core member disposed on the lower side in the stacking direction of the sixth iron core member and having a hole having a diameter larger than that of the sixth protrusion at a position corresponding to the sixth protrusion;
The laminated iron core for a rotating electrical machine according to claim 1, further comprising a flat iron core member. A laminated iron core manufacturing apparatus for a rotating electrical machine according to any one of claims 1 to 5,
A plate thickness measuring device for measuring a plate thickness in a direction perpendicular to the rolling direction of the steel plate;
An arithmetic device for calculating the number of the iron core member having the protrusion and the flat iron core member based on the measurement result of the plate thickness by the plate thickness measuring device;
A mold for forming the protrusions by half punching based on a calculation result by the calculation device;
An apparatus for manufacturing a laminated iron core for a rotating electrical machine, comprising a punching die for punching the steel plate to form the iron core member.

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