JP4921843B2 - Manufacturing method and manufacturing apparatus for rotating electrical machine core pieces - Google Patents

Description

  The present invention relates to a manufacturing method and a manufacturing apparatus for a core piece for a rotating electrical machine for manufacturing a core piece made of a magnetic steel sheet, which is a component for assembling a stator laminated core and a rotor laminated core for a rotating electrical machine.

  For example, a stator core piece 1 having a plurality of magnetic pole teeth 3 projecting from the annular yoke portion 2 toward the center as shown in FIG. As shown in FIG. 2, a stator laminated iron core 4 is used which is laminated in a plurality and laminated in the laminating direction. Further, a developed core piece 5 as shown in FIG. 23 (a) in which the stator core piece 1 shown in FIG. 22 (a) is divided and developed by the number of the magnetic poles is manufactured, and is laminated into a cylindrical shape after being laminated. A stator laminated core 4 ′ which is plastically deformed and welded at both ends and assembled as shown in FIG. 23B is also used.

  The rotor of the other rotating electrical machine has a shaft hole 6 for inserting a rotating shaft at the center as shown in FIG. 24A, and a required number of slots 7 for embedding permanent magnets at the outer peripheral portion. A rotor laminated core 9 assembled by laminating a plurality of core pieces 8 and caulking in the lamination direction as shown in FIG. 24 (b) is used.

  By the way, for example, in HEV motors and high-speed generators for distributed gas turbines, it is necessary to increase the number of rotations in order to reduce the size of rotating electrical machines. Increasing the number of revolutions of the rotating electrical machine increases the iron loss generated in the iron core, especially eddy current loss, which reduces the motor efficiency, and also requires a reduction in iron loss from the viewpoint of preventing heat generation. It is. In order to reduce the iron loss, it is most effective to make the magnetic steel sheet, which is the material of the iron core, thin.

  Conventionally, as shown in FIG. 25, a thin core piece, which is a component for assembling the stator laminated core and the rotor laminated iron core, uncoils the coil 11 of the strip-shaped magnetic steel sheet and feeds it out by the roll feeder 12. It was manufactured by the method of using and die-cutting.

  However, in the conventional method of manufacturing an iron core piece shown in FIG. 25, since the die cutting operation using the press device 13 is performed, the material supply must be tact-fed. Therefore, there is a problem that the production efficiency is lowered due to the limit of the material feed speed. Further, when the plate thickness of the magnetic steel plate is reduced, the burr (return) generated at the time of die cutting is relatively increased with respect to the plate thickness. For this reason, when laminated, there is a problem that the product performance deteriorates due to an increase in iron loss and a decrease in stacking accuracy due to a short circuit of one end face of the iron core. Furthermore, the increase in the size of the press device 13 accompanying an increase in the press load has led to an increase in equipment cost and an increase in the fixed cost of the production line due to an increase in the installation area.

  The present invention has been made to solve such problems of the prior art, and its purpose is to reduce product performance when laminated to form a stator laminated core or a rotor laminated core of a rotating electrical machine. An object of the present invention is to provide a method and an apparatus for manufacturing a core piece for a rotating electrical machine that can efficiently manufacture an iron core piece that is not allowed to be formed, particularly a thin core piece.

In order to achieve the above object, the method for manufacturing a core piece for a rotating electrical machine according to the present invention is a method for manufacturing a core core piece which is a component for assembling a stator laminated core or a rotor laminated core of a rotating electrical machine. A step of uncoiling the coil of the strip-shaped magnetic steel plate as the material of the iron core piece and feeding the material steel plate at a predetermined speed, and a convex cutting blade adapted to the shape of the iron core piece to be manufactured on the outer peripheral surface in a cylindrical shape. A cutter roller provided and a cylindrical roller-shaped receiving roller having a smooth outer peripheral surface are arranged to face each other with their peripheral surfaces facing each other, and the two rollers are rotated in opposite directions to be sent out between the two rollers. while it retracted across the steel sheet, seen including a collecting step of integrating a cutout step of cutting out the core piece Oshikiri' the steel sheet in the convex cutting edge of the cutter roller, the core pieces unplugged該切the collection box An elastic body having a thickness smaller than the height of the convex cutting blade is fixed to the outer peripheral surface of the cutter roller where the convex cutting edge is not provided. In the cutting step, the elastic body Is characterized in that the warpage deformation of the iron core piece is restricted by abutting against the material steel plate (invention of claim 1).

The manufacturing apparatus for a core piece for a rotating electrical machine according to the present invention is a device for manufacturing a core core piece which is a component that is laminated to assemble a stator laminated core or a rotor laminated core of a rotating electrical machine. A feeding device that uncoils the coil of the strip-shaped magnetic steel plate that is the raw material and feeds the raw steel plate at a predetermined speed, and a cutter roller having a cylindrical cutting shape and a convex cutting blade that matches the shape of the iron core piece manufactured on the outer peripheral surface thereof; A cylindrical roller and a receiving roller having a smooth outer peripheral surface are arranged opposite to each other with their peripheral surfaces facing each other, and both the rollers are rotated in opposite directions to sandwich the fed steel plate between the rollers. while retraction in a cutout device cutting out the core piece Oshikiri' the steel sheet in the convex cutting edge of the cutter rollers, e Bei a collection box for integration the sections pulled the core pieces, the cutter rollers On the outer peripheral surface of the convex cutting edge is not formed, (claim having characterized in that the elastic member for warping deformation restricting having a thickness smaller than the height of the convex cutting edge is fixed 7 invention).

According to the present invention, an iron core piece can be continuously cut out at a high speed by a rotating convex cutting blade while continuously feeding a raw steel plate, so that the productivity is greatly enhanced. Moreover, since the core piece is pressed and cut out, an iron piece with few burrs (returns) can be manufactured. Therefore, when the iron core pieces are laminated to form a stator laminated iron core or a rotor laminated iron core, the volume occupancy of the iron core pieces is increased, and the iron loss as the laminated iron core is reduced. Since a large press device is not required, the equipment cost and the installation area can be reduced. Moreover, an elastic body is fixed to the outer peripheral surface of the cutter roller where the convex cutting edge is not provided, and in the cutting process, the elastic body abuts on the material steel plate and the warp deformation of the iron core piece is restricted. Therefore, the warpage of the iron core piece when being cut out is restricted, and the warp deformation remaining on the iron core piece after being cut out can be minimized.

In the present invention, on the outer peripheral surface of the cutter roller, a first convex cutting blade having a shape that matches the shape of the iron core piece as a component for assembling the stator laminated iron core, and a component for assembling the rotor laminated iron core, By providing one or more second convex cutting blades each having a shape matching the shape of the core piece, the iron core for the stator laminated iron core during one rotation of the cutter roller in the cutting step One or a plurality of pieces and one or more pieces of the core for the rotor laminated core can be cut out (inventions of claims 2 and 8 ). According to this, both the core piece for stator laminated cores and the core piece for rotor laminated cores can be manufactured while using one cutter roller.

Alternatively, two pairs of rollers of the cutter roller and the receiving roller are installed in series in the feed direction of the material steel plate, so that in the cutting process, the disk for the rotor laminated core is formed by the pair of rollers on the upstream side. The annular core piece for the stator laminated core is cut out from the material steel plate around the trace hole where the disk-shaped core piece is cut out at the downstream pair of rollers. (Invention of claims 3 and 9 ) According to this, two types of core pieces having different shapes for the stator laminated core and the rotor laminated core can be continuously and efficiently manufactured with a high material yield.

Further, in the present invention, the receiving roller is installed on the lower side of the cutter roller, a magnetic adsorption force is applied to the outer peripheral surface layer portion of the receiving roller, and further, the surface of the lower side portion of the receiving roller is contacted or approached. By providing the stopper, in the cutting step, the cut iron piece is rotated and lowered while being magnetically attracted to the receiving roller. In the stacking step, the rotated and lowered iron piece is The stopper can be configured to be peeled off and the peeled-off core pieces can be accumulated in the accumulation box (inventions of claims 4 and 10 ). According to this, it becomes easy to accumulate | store the cut-out iron core piece in the state arranged in the accumulation box.

Furthermore, in the present invention, in addition to the convex cutting blade, the cutter roller is provided with a half cutting blade for making a half-cut into the material steel plate. At the same time, the half-cutting blade can be configured such that a half-cut-like cut is formed at a predetermined location of the iron core piece (inventions of claims 5 and 11 ). According to this, it is possible to make a semi-cut incision at a predetermined place where the iron core piece is bent in the subsequent process. If there is a shallow notch in the part to be folded, the force required for folding can be reduced, and the bending work can be facilitated.

  By the way, when manufacturing an iron core piece as mentioned above, in order to raise the dimensional accuracy of an iron core piece, it is desirable that the edge part of the said convex cutting edge shall have an acute ridge. However, if the material steel plate is cut with an acute convex cutting edge, the cut end is difficult to open, and the core piece and the remaining material of the material steel plate are discharged from the roller while being in close contact with each other. Inconvenience that it will not be separated. Such close contact between the iron core piece and the remaining material not only requires time and effort to separate and collect the iron core pieces, but also the remaining material discharged from the roller hits other parts and is distorted or deformed. When this occurs, the deformation force is also transmitted to the iron core piece, and the iron core piece is easily deformed, leading to problems such as deterioration in the performance of the rotating electrical machine.

Therefore, in the present invention, in addition to the convex cutting blade, in addition to the convex cutting blade, the cutter roller is used to form a cut with respect to the remaining material obtained by cutting out the iron core piece of the material steel plate. By providing an auxiliary cutting edge, in the cutting step, the remaining piece can be cut by the auxiliary cutting edge simultaneously with the cutting of the core piece (inventions of claims 6 and 12). ).

  According to this, since the notch is formed in the remaining material at the same time when the core piece is cut out, the remaining material located around the iron core piece starts to be deformed starting from the notched portion. Along with this, the cut portion by the convex cutting edge is easily opened, and the iron core piece and the remaining material are naturally separated. Therefore, deformation of the iron core piece can be prevented, and an iron core piece with high dimensional accuracy can be manufactured. Moreover, the deformation | transformation of a remaining material part can also anticipate the effect which makes the biting to the raw steel plate of a convex cutting blade easy, and reduces a cutting load. Of course, a separate device for separating the remaining material and the iron core piece is not necessary.

  In this case, when the cutting blade provided on the outer periphery of the cutter roller extends at right angles to the feed direction, the cutting blade bites into the material steel plate and cuts at a stroke, whereas the cutting blade is formed in the cutter roller. When extending in the circumferential direction, the cutting blade gradually cuts while pressing the material steel plate, and the deformation amount of the material steel plate is increased. That is, depending on the direction (angle) in which the cutting edge extends, the shear component and the rolling (extrusion) component work on the material steel plate, and as the cutting blade extends in the circumferential direction, the latter force increases, When the extending direction is the circumferential direction, the cutting effect is significantly reduced.

Therefore, when providing the auxiliary cutting edge as described above, it is desirable that the auxiliary cutting edge is provided so as to extend in a direction inclined with respect to the circumferential direction of the cutter roller (invention of claim 13 ). Thereby, it is possible to easily separate the iron core piece and the remaining material by deforming the remaining material while maintaining the cutting effect of the cut formed in the remaining material. In addition, when the auxiliary cutting edge is provided so as to extend at right angles to the feed direction, the number of parts that are pressurized simultaneously with the convex cutting edge increases, and thus the pressure applied to the convex cutting edge may be insufficient. However, it is possible to ensure the pressurizing force at the convex cutting edge by extending in the inclined direction.

  Moreover, as a strip | belt-shaped magnetic steel plate (material steel plate) used as the raw material of the said iron core piece, there exist various kinds of things from a high hardness thing to a low hardness thing. Among them, low-hardness materials (relatively soft materials) have a high deformation capacity at the time of cutting, whereas high-hardness materials (relatively brittle materials) are mainly subject to brittle fracture, so the cutting edge There are circumstances where cracks tend to occur toward the other side.

Therefore, the auxiliary cutting edge can be formed integrally with the convex cutting edge (invention of claim 14 ). According to this, since the cutting by the convex cutting blade and the cutting by the auxiliary cutting blade are continuous, even if the material steel plate is low in hardness and easily deformed, the effect of separating the iron core piece from the remaining material becomes high.

On the other hand, if the auxiliary cutting edge is provided separately from the convex cutting edge (invention of claim 15 ), the material steel plate is of high hardness, and cracks develop from the incision by the auxiliary cutting edge. However, the crack can be prevented from extending to the inside of the core piece to be cut out. Rather, the crack causes the incision by the convex cutting edge and the incision by the auxiliary cutting edge to be connected, and the iron core The piece and the remaining material can be separated well.

  When the auxiliary cutting edge is provided, for example, in order to increase the dimensional accuracy of the iron core piece, if the cutting edge portion of the auxiliary cutting edge is extremely acute or the surface on one side of the cutting edge portion is a precipitous vertical surface, the cutter When the contact between the roller and the receiving roller is inclined, or when the pulling-in of the material steel plate is inclined, a phenomenon occurs in which the material steel plate swings or moves in the lateral direction when cutting with the auxiliary cutting blade. Due to the lateral vibration of the material steel plate, a lateral bending stress acts on the auxiliary cutting edge (and the convex cutting edge), and the cutting edge may be chipped or chipped.

In this invention, the front-end | tip part of the said auxiliary cutting blade can be comprised in the mountain shape which has the inclined surface on both sides (invention of Claim 16 ). Thereby, when the material steel plate is cut by the auxiliary cutting edge, the angled inclined surface exhibits an action of pressing and fixing the material steel plate, and an effect of preventing the material steel plate from sideways is obtained. Therefore, it is possible to prevent unnecessary lateral bending stress from acting on the cutting edge of the auxiliary cutting edge or the convex cutting edge due to the lateral deflection of the material steel plate, and the cutting edge portion of the auxiliary cutting edge and the convex cutting edge. It is possible to extend the life by preventing defects such as defects.

At this time, among the inclined surfaces of the tip of the auxiliary cutting edge, the inclination of the surface facing the opposite side to the convex cutting edge is made gentler than the inclination of the surface facing the convex cutting edge. (Invention of claim 17 ). According to this, at the time of cutting with the auxiliary cutting edge, the remaining material is removed from the side opposite to the convex cutting edge, that is, from the iron core piece, with respect to the material steel plate by the gentle inclined surface of the tip of the auxiliary cutting edge. A pressing force can be obtained in the separating direction, and the core piece and the remaining material can be separated more favorably.

Further, when the outer shape of the iron core piece and thus the shape of the convex cutting edge is, for example, a complicated curved shape, the auxiliary cutting edge having a gently inclined surface at the tip cannot be arranged in space. Such a case occurs. Therefore, if the inclined surface of the tip of the auxiliary cutting edge on the side facing away from the convex cutting edge is gradually inclined as the distance from the convex cutting edge increases ( The invention of claim 18 ), even if the space is narrow in the vicinity of the convex cutting blade, by providing a gently inclined surface in the portion where the space is widened away from the convex cutting blade, the core piece and the remaining material An effect of improving the separation can be obtained.

Furthermore, among the auxiliary cutting edge, the side closer to the convex cutting edge, composed of a highly hard material, the farther from the convex cutting edge may be composed of highly tough material (claim 19 inventions). According to this, the portion close to the convex cutting edge of the auxiliary cutting edge, which is made of the material steel plate, is made of a material with high hardness, so that it can withstand a large load without dulling the cutting edge. can do. On the other hand, the side of the auxiliary cutting blade that is far from the convex cutting blade places importance on the function of separating the remaining material rather than the cutting function. Compared to the case of using a material, it is easy to process and can be made inexpensively.

In the present invention, the number of blades including the convex cutting blade and the auxiliary cutting blade arranged along a line extending in the width direction of the cutter roller is any of the circumferential directions of the cutter roller. Even in this position, it can be configured to be within the cutting edge limit proof stress (invention of claim 20 ). According to this, the burden of the cutting edge load of a convex cutting blade can be reduced. At this time, if the number of blades is configured to be substantially the same in the circumferential direction of the cutter roller (the invention of claim 21 ), an extremely large blade load is not generated, and the convex cutting blade and the auxiliary cutting blade Can improve the service life.

  According to the manufacturing method and the manufacturing apparatus of the core piece for a rotating electrical machine of the present invention, when the laminated core is the stator laminated core or the rotor laminated core of the rotating electrical machine, the core piece that does not deteriorate the product performance, In particular, an excellent effect that a thin iron core piece can be efficiently manufactured can be obtained.

  Several embodiments embodying the present invention will be described below with reference to FIGS. In the following embodiments, the present invention is also applied to the case where the stator core piece 1, the developed core piece 5, and the rotor core piece 8 as shown in FIGS. 22 to 24 are manufactured. It is a thing. Therefore, for these, new illustrations and detailed descriptions are omitted, and the reference numerals are also used in common.

(1) First Embodiment First, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 schematically shows the configuration of an iron core piece manufacturing apparatus (production line) according to the present embodiment. An iron core piece (for example, a developed iron core piece 5) which is a part for assembling a laminated iron core used for a stator of a rotating electric machine or a laminated iron core used for a rotor is made of a magnetic steel plate such as an electromagnetic steel plate. As the magnetic steel plate, which is a material, a coil material 20 in which a strip-shaped steel plate (hereinafter referred to as a material steel plate 22) is wound in a coil shape is used.

  The coil material 20 is set on the uncoiler device 21 so as to be rotatable about a horizontal axis. One end of the material steel plate 22 is drawn out from the coil material 20 and drawn into the leveler feeder 23. The leveler feeder 23 corrects the curl of the uncoiled material steel plate 22 and feeds it in the direction of arrow F at a constant speed. The uncoiler device 21 and the leveler feeder 23 constitute a delivery device. In the manufacturing method of this embodiment, the iron core piece 5 is manufactured not by die cutting using a conventional die and punch, but by continuous cutting using a convex cutting edge formed on the outer peripheral surface of the rotating roll. For this reason, the raw steel plate 22 is continuously fed at a constant speed instead of tact feeding (feeding process).

  The material steel plate 22 sent out from the leveler feeder 23 is then fed into the core piece cutting device 25. The core piece cutting device 25 is a device that cuts out a core piece 5 having a desired shape according to the stator laminated core 4 ′ (or the rotor laminated iron core) to be manufactured from the material steel plate 22. The main part is configured by combining a cutter roller 26 and a receiving roller 27.

  The cutter roller 26 is a roll formed in a substantially cylindrical shape as shown in FIG. 2, and a narrow large diameter portion 29 is formed at both ends of the roll, and a small diameter portion is formed between the large diameter portions 29 at both ends. 30 is formed. The width dimension of the small diameter portion 30 is configured to be slightly larger than the width dimension of the material steel plate 22. The other receiving roller 27 is a cylindrical roll having a smooth outer peripheral surface. The cutter roller 26 and the receiving roller 27 are rotatably provided with their respective axes X1 and X2 being parallel to each other. At this time, in a state where the large-diameter portion 29 of the cutter roller 26 is abutted against the outer peripheral surface of the roller 27, the cutter roller 26 is placed facing upward.

  Rotating shafts 32 and 33 are provided so as to protrude from both axial end surfaces of both rollers 26 and 27. Gears 35 and 36 that mesh with each other are attached to the rotating shafts 32a and 33a on one side (right side in FIG. 2). A drive motor 39 is attached to the opposite rotation shaft 32b of the cutter roller 26. The cutter motor 26 is rotationally driven by the drive motor 39, and accordingly, the receiving roller 27 is synchronously driven in the opposite direction to the cutter roller 26 by the gears 35 and 36, and both the rollers 26 and 27 have the same peripheral speed. And rotate. Even if the receiving roller 27 is in a free state, the receiving roller 27 rotates substantially synchronously by the pressure between the rollers 26 and 27. In the free state, a portion where the cutting blade, which will be described later, and the surface of the receiving roller 27 come into contact with each other is shifted little by little, which has an effect of extending the life of the receiving roller 27 surface.

  A convex cutting edge 40 having a triangular cross section at the tip is formed at the center of the outer surface of the small diameter portion 30 of the cutter roller 26. The convex cutting edge 40 has a height that protrudes about several μm from the large-diameter portion 29, and the shape developed in a plane is the shape of the core piece 5 cut out from the material steel plate 22 fed between the rollers 26 and 27. It is formed to be the same.

  The raw steel plate 22 is fed between the rollers 26 and 27, and the rollers 26 and 27 are driven to rotate by the drive motor 39. The convex cutting edge 40 of the cutter roller 26 rotates on the raw steel plate 22 that moves on the receiving roller 27. Pressed. Then, the material steel plate 22 is pressed between the convex cutting edge 40 and the peripheral surface of the receiving roller 27, and the iron core piece 5 having the same shape as the convex shape of the convex cutting edge 40 is cut out and dropped (cutout). Process).

  The cutter roller 26 is disposed on the upper side and the receiving roller 27 is disposed on the lower side in order to facilitate the dropping of the cut iron core piece 5. The dropped iron core pieces 5 are collected in a collection box 44 arranged under the receiving roller 27 (stacking step).

  According to the manufacturing method and the manufacturing apparatus of the present embodiment, the core piece 5 having the same shape as the shape of the convex cutting edge 40 of the cutter roller 26 developed in a plane can be cut out from the material steel plate 22. Therefore, if the planar development shape of the convex cutting edge 40 is formed in the shape shown in FIG. 22A or FIG. 23A, FIG. 22B or FIG. The core pieces 1 and 5 for assembling the stator laminated cores 4 and 4 ′ having the shape shown in FIG. If the convex cutting edge 40 is formed in the shape shown in FIG. 24A, the core piece 8 for assembling the rotor laminated core 9 having the shape shown in FIG. 24B can be manufactured. it can.

  The core piece 5 manufactured by the manufacturing method of this embodiment for pressing the material steel plate 22 between the convex cutting edge 40 and the peripheral surface of the receiving roller 27 is obtained by die cutting using a conventional die and punch. There is a feature that burrs (return) are very few compared with the manufactured core piece. This is because the core piece 5 is not cut by two blades, ie, a die and a punch, but is cut by cutting the material steel plate 22 into the shape of the convex cutting blade 40 between the convex cutting blade 40 and the receiving roller 27. This is considered to be because the receiving roller 27 prevents the occurrence of burrs during pressing. Therefore, if the core piece 5 manufactured by this manufacturing method is used as a part for assembling the laminated core 4 ′, there is an effect of reducing iron loss due to short circuit of the end face of the core piece because there are few burrs. Moreover, since there are few burrs, a stacking precision improves and the volume occupation rate of the core piece at the time of lamination | stacking also becomes high.

  Furthermore, unlike the conventional manufacturing method, in which the material steel plate 22 is tucked and punched by the press device 13, the material steel plate 22 is continuously fed at high speed and continuously cut by the convex cutting blade 40. Can be achieved, and the productivity is greatly increased. Further, since the cutting is performed by line contact, the pressure applied to the convex cutting edge 40 can be reduced. Therefore, there is an effect that an equipment cost and an equipment area can be reduced without requiring a large press machine as in the prior art.

  In addition, since the rotating electrical machine requires two types of laminated cores, that is, a stator laminated core and a rotor laminated core, it is necessary to manufacture two types of core pieces. Although illustration is omitted, in order to produce these two types of iron core pieces, a first convex cutting blade having a shape matching the iron core piece 1 for the stator laminated iron core 4 is formed on the small diameter portion of the cutter roller, and rotated. It is preferable to form one or a plurality of two types of convex cutting blades, each of which is a second convex cutting blade having a shape matching the core piece 8 for the child laminated core 9. By doing so, it is convenient that the core piece 1 for the stator laminated core and the core piece 8 for the rotor laminated core can be cut out simultaneously while one cutter roller rotates once.

(2) Second Embodiment FIGS. 3 to 5 show a second embodiment of the present invention. Hereinafter, differences from the first embodiment will be described.

  In order to manufacture two types of core pieces having different shapes for the stator laminated core and the rotor laminated core from the same coil material, as shown in FIG. The core piece cutting devices 41, 42 are installed in series in the feed direction of the steel plate 22, and on the other hand, the core piece for the stator laminated core is manufactured on the other hand and the core piece for the rotor laminated core is manufactured. Also good.

  At this time, when the shape of the iron core piece 1 for the stator laminated iron core 4 is the shape of FIG. 22A and the iron core piece 8 for the rotor laminated iron core 9 is the shape of FIG. Is configured such that the core piece 8 is cut out by the upstream core piece cutting device 41 and the core piece 1 is cut out by the downstream core piece cutting device 42.

  The iron core piece 8 for the rotor laminated core 9 for the same rotating electrical machine is sized to fit within a circular hole of the iron core piece 1 for the stator laminated iron core 4 with a small gap 47 as shown in FIG. Therefore, first, in the upstream core piece cutting device 41, as shown in FIG. 5 (a), the convex cutting edge 40 is brought into contact with the center of the width of the material steel plate 22, and the iron core for the rotor laminated core 9 is used. Cut out piece 8. When cut out, a cut hole 48 is formed in the center of the width of the material steel plate 22 as shown in FIG.

  In the subsequent core piece cutting device 42 on the downstream side, as shown in FIG. 5C, the core piece for the stator laminated core 9 is made so that the convex cutting edge 40 comes into contact with the peripheral portion of the mark hole 48. Cut out 8. When cut out, as shown in FIG. 5D, a cut hole 49 remains in the center of the width of the raw steel plate 22. By cutting through in this way, two types of core pieces 8, 1 can be manufactured with high material yield from the material steel plate 22 having the area occupied by the core piece 1 for the stator laminated core 4. In order to make the convex cutting edge 40 of the downstream iron piece cutting device 42 hit the position as shown in FIG. 5C, the rotation of the cutter roller 26 of the downstream device 42 is changed to the upstream device. The rotation position of the 41 cutter rollers 26 is mechanically or electrically followed.

(3) Third Example FIG. 6 is a partial longitudinal sectional view showing the configuration of a cutter roller 45 according to a third example of the present invention. In this case, the cutter roller 45 has an elastic body (elastic thin plate) 50 formed of a material such as elastic synthetic resin or rubber on the outer peripheral surface of the small diameter portion 30 where the convex cutting edge 40 is not formed. It is attached. The thickness of the elastic body is smaller than the height of the convex cutting edge 40. This elastic body 50 is for preventing the iron core piece 5 from being warped at the time of cutting and remaining on the iron core piece 5 after the warping.

  The thickness dimension of the material steel plate 22 that is the material of the core piece 5 is smaller than the height dimension of the convex cutting edge 40. Therefore, when pressing with the convex cutting edge 40, a gap corresponding to the difference between the height of the convex cutting edge 40 and the thickness of the material steel plate 22 between the outer peripheral surface of the small diameter portion 30 and the outer peripheral surface of the receiving roller 27. Can do. Since the cutout of the core piece 5 from the raw steel plate 22 is a press cut by the convex cutting edge 40, if such a gap remains, the core cut out at the time of the press cut as shown in FIG. 6 (b). The piece 5 is warped in the gap 51. This warpage may remain in the iron core piece 5 after being cut out.

  On the other hand, when the elastic body 50 is cut out by the cutter roller 45 attached to the small-diameter portion 30, the core piece 5 from which the elastic body 50 is cut out by closing the gap 51 as shown in FIG. Is pressed against the receiving roller 27 from the back side. For this reason, the warp of the iron core piece 5 at the time of cutting is reduced, and the warp remaining on the iron core piece 5 after being cut out can be minimized.

(4) Fourth Embodiment FIG. 7 shows a fourth embodiment of the present invention. In this embodiment, the configuration of the receiving roller 52 and the method of stacking the cut iron core pieces 5 are different from those in the first embodiment. In this case, the receiving roller 52 has a surface layer magnetized so that N poles and S poles are alternately arranged at regular intervals in the circumferential direction of the outer peripheral surface, thereby forming a magnetic attracting part 52a. The core piece 5 cut out by the convex cutting edge 40 is conveyed to the lower position of the receiving roller 52 while being attracted to the surface layer portion of the magnetized receiving roller 52. A stopper 53 is provided on the lower side of the receiving roller 52 so as to contact or approach the lower surface of the receiving roller 52 at the leading end. The core piece 5 conveyed to the lower position of the receiving roller 52 in the attracted state hits the stopper 53 and is peeled off and collected in the collecting box 44.

  In the receiving roller 27 of the first embodiment, the cut iron core piece 5 slides down the surface of the receiving roller 27. Therefore, the iron core pieces 5 are randomly accumulated in the accumulation box 44. On the other hand, in the case of the fourth embodiment, the cut-out iron core pieces 5 are easily stacked in a state of being aligned with the stacking box 44.

(5) Fifth Embodiment FIGS. 8 to 11 show a fifth embodiment of the present invention. In this embodiment, the configuration of the cutter roller 54 is different from that of the first embodiment. As shown in FIG. 8, the cutter roller 54 is provided with a convex cutting edge 40 that pushes the material steel plate 22 at a small diameter portion, and in addition, the height of the blade is higher than the convex cutting edge 40. A low half cutting edge 55 is provided. This half-cutting edge 55 is for putting a half-cut notch 63 (see FIG. 11) in a desired location of an iron core piece 57 (see FIGS. 9 to 11) cut out from the material steel plate 22. For example, Use when

  Usually, a plurality of the cut core pieces 57 are laminated and then formed into a laminated core by caulking. As shown in FIG. 9, in the case of an iron core piece 57 for a rotor laminated iron core, for example, four caulking portions 58 are provided for caulking and coupling. FIG. 10A is an example of a sectional view taken along line XX of the caulking portion 58, and FIG. 10B is an example of a sectional view taken along line YY of FIG. In this example, a tongue-shaped cut-and-projection piece 60 is formed on the iron core piece 57, and a skew relief hole 61 is provided on the iron piece 57 and connected to the free end side of the protrusion piece 60. Then, another iron core piece 57 having the same shape is laminated on the iron core piece 57 as indicated by a broken line in the figure. In this case, the cut-and-raised protrusion piece 60 of the other iron core piece 57 is laminated. Are skewed and overlapped with the trace hole portion of the cut-and-raised projecting piece portion 60 of the preceding iron core piece 57.

  In the case of a manufacturing method by die cutting using a conventional press device, the tongue-shaped cut and raised projecting piece portion 60 is bent by pressing during a progressive die cutting process. On the other hand, in the case of the cutting by the roller as in the present embodiment, the periphery of the portion necessary for the formation of the raised and projecting piece 60 can be cut as shown in FIG. It cannot be bent into a unique shape. Therefore, it is necessary to perform the bending process separately in a later process. In the subsequent process, when the tongue-shaped cut-and-projection piece 60 is bent, as shown in FIG. The half cutting edge 55 is used for this purpose. If such a shallow notch 63 is inserted, the pressing force at the time of bending as shown in FIG. 11B in the subsequent process can be reduced, and the bending work can be facilitated.

(6) Sixth and Seventh Embodiments Next, a sixth embodiment of the present invention will be described with reference to FIGS. FIG. 12 schematically shows the configuration of an iron core piece manufacturing apparatus according to the sixth embodiment. Similar to the first embodiment, the manufacturing apparatus corrects the curling habit of the uncoiler device 21 in which the coil material 20 obtained by winding the material steel plate 22 in a coil shape and the drawn material steel plate 22 is fixed and constant. A feeding device composed of a leveler feeder 23 that feeds in the direction of arrow F at a speed, a cutting device 71 for cutting out the core pieces 5 from the material steel plate 22, and an accumulation box 44 for collecting the cut out core pieces 5 are provided. Although not shown in detail, a recovery unit for recovering the remaining material 73 of the raw steel plate 22 via a roller or the like is provided further downstream of the cutting device 71.

  In the present embodiment, the cutting device 71 is also configured to include a cutter roller 72 and a receiving roller 27. As shown in FIG. 13, the cutter roller 72 also has a small-diameter portion 30 between the large-diameter portions 29 at both ends, and the outer peripheral surface portion of the small-diameter portion 30 has an outer shape (contour) shape of the core piece 5. The convex cutting edge 40 corresponding to is provided. In this embodiment, in addition to the convex cutting edge 40, the remaining iron plate 5 of the material steel plate 22 is cut out around the convex cutting edge 40 in the cutter roller 72 (small diameter portion 30). A large number of auxiliary cutting edges 74 for forming cuts 73a (both see FIG. 14) for the material 73 are provided.

  As shown in FIG. 13, the auxiliary cutting edge 74 is positioned around the outside of the convex cutting edge 40, and is mainly perpendicular to the width direction of the cutter roller 72 (feeding direction (circumferential direction) of the steel sheet 22). A large number are provided so as to extend a predetermined length in the direction) (partly so as to extend a predetermined length in the circumferential direction). Further, in this embodiment, as shown in FIG. 15, the auxiliary cutting edge 74 is provided integrally and continuously from the outer surface portion of the convex cutting edge 40.

  In such a configuration, in the cutting process, the material steel plate 22 is interposed between the convex cutting blade 40 and the peripheral surface of the receiving roller 27 while the material steel plate 22 is drawn between the cutter roller 72 and the receiving roller 27. The core piece 5 is punched by cutting the core piece 5, but simultaneously with the cutting of the core piece 5, a cut 73 a is formed in the remaining material 73 by the auxiliary cutting edge 74.

  Here, in the configuration in which the auxiliary cutting edge 74 does not exist as in the first embodiment described above, the cutting edge portion of the convex cutting edge 40 is configured with an acute angle in order to increase the dimensional accuracy of the iron core piece 5. In this case, the cut end is difficult to open, and the iron core piece 5 and the remaining material 73 of the material steel plate 22 are in close contact with each other and are discharged from the roller, which may not be easily separated. Such close contact between the core piece and the remaining material not only requires time and effort to separate and collect the core pieces 5, but also causes distortion and deformation of the remaining material 73 portion discharged from the roller. Also, the iron core piece 5 is easily deformed, leading to problems such as deterioration of the performance of the rotating electrical machine.

  However, in this embodiment, as shown in FIG. 14, the notch 73 a is formed in the remaining material 73 simultaneously with the cutting of the iron core piece 5, so that the remaining material 73 positioned around the iron core piece 5 is notched. The deformation starts from the 73a portion, and along with this, the cut portion by the convex cutting edge 40 is easily opened, and the iron core piece 5 and the remaining material 73 are naturally separated. Therefore, deformation of the iron core piece 5 can be prevented, and the iron core piece 5 with high dimensional accuracy can be manufactured. In addition, the deformation of the remaining material 73 part can be expected to reduce the cutting load by facilitating the biting of the convex cutting blade 40 into the material steel plate 22.

  In particular, in the present embodiment, the auxiliary cutting edge 74 is provided integrally with the convex cutting edge 40, so that the cutting with the convex cutting edge 40 formed on the material steel plate 22 and the cutting with the auxiliary cutting edge 74 are performed. 73a becomes continuous. For example, even when the material steel plate 22 is easily deformed and has a low hardness, the effect of separating the core piece 5 and the remaining material 73 is high.

  FIG. 16 shows a seventh embodiment of the present invention. The difference from the sixth embodiment is that the auxiliary cutting edge 75 is separated from the convex cutting edge 40 (with a slight gap). E) where it is. According to such a configuration, even if the material steel plate 22 is of high hardness and cracks are likely to progress from the cut 73a by the auxiliary cutting edge 75, the crack is prevented from progressing to the inside of the core piece 5 to be cut out. Rather, by the crack, the cutting by the convex cutting edge 40 and the cutting by the auxiliary cutting edge 75 are connected, and the core piece 5 and the remaining material 73 can be well separated.

(7) Eighth Embodiment FIG. 17 shows a configuration of a cutter roller 81 according to an eighth embodiment of the present invention, and points different from the sixth embodiment will be described. Also in the eighth embodiment, the core piece 5 of the material steel plate 22 is cut out on the outer peripheral surface portion of the cutter roller 81 (small diameter portion 30) in addition to the convex cutting edge 40 for cutting out the core piece 5. A large number of auxiliary cutting blades 82 are provided for forming cuts in the remaining material 73. The auxiliary cutting edge 82 is provided around the outer periphery of the convex cutting edge 40 and extends in a direction inclined with respect to the circumferential direction of the cutter roller 81. Further, the auxiliary cutting edge 82 is a mixture of those that are continuous to the outside of the convex cutting edge 40 and those that are separated from the convex cutting edge 40.

  Furthermore, in this embodiment, the number of blades that are arranged along the line extending in the width direction of the cutter roller 81 and that combines the convex cutting blade 40 and the auxiliary cutting blade 81 is the number of blades of the cutter roller 81. At any position in the circumferential direction, it is configured to be within the cutting edge limit proof stress and to be substantially the same in the circumferential direction of the cutter roller 81. That is, the auxiliary cutting blade 81 is formed so that the number of blades is all four on each line illustrated by the alternate long and short dash lines A, B, and C as lines extending in the width direction of the cutter roller 81. .

  Here, when the cutting blades (including the convex cutting blade and the auxiliary cutting blade) provided on the outer periphery of the cutter roller 81 extend perpendicular to the feed direction, the cutting blade bites into the material steel plate 22 and cuts at once. On the other hand, when the cutting blade extends in the circumferential direction of the cutter roller 81, the cutting blade gradually cuts while pressing the material steel plate 22, and the deformation amount of the material steel plate 22 is increased. . That is, depending on the direction (angle) in which the cutting blade extends, the shear component and the rolling (extrusion) component with respect to the raw steel plate 22 work, and the latter force increases as the cutting blade extends in the circumferential direction. When the extending direction is the circumferential direction, the cutting effect is significantly reduced.

  Therefore, as in this embodiment, by providing the auxiliary cutting edge 82 extending in a direction inclined with respect to the circumferential direction of the cutter roller 82, while maintaining the cutting effect of the cut formed in the remaining material 73, The remaining material 73 is deformed so that the iron core piece 5 and the remaining material 73 can be easily separated. In addition, when the auxiliary cutting edge is provided to extend at right angles to the feed direction, the pressure applied at the same time as the convex cutting edge 40 is increased, so that the pressing force at the convex cutting edge 40 may be insufficient. However, by providing the auxiliary cutting edge 82 so as to incline, it is possible to ensure the pressure applied to the convex cutting edge 30.

  Further, in the present embodiment, the number of blades that are the combination of the convex cutting blade 40 and the auxiliary cutting blade 81 arranged along a line extending in the width direction of the cutter roller 81 is the circumferential direction of the cutter roller 81. Since it has been configured so as to be within the cutting edge limit proof stress at any position, the load on the cutting edge load of the convex cutting edge 40 can be reduced. At this time, since the number of blades is configured to be substantially the same number (four) in the circumferential direction of the cutter roller 81, an extremely large blade load is not generated, and the convex cutting edge 40 and the auxiliary cutting edge 82 are generated. Can improve the service life.

(8) Ninth to Twelfth Embodiment, Other Embodiments FIGS. 18 to 21 show the configurations of auxiliary cutting edges according to ninth to twelfth embodiments of the present invention, respectively.

  Here, when the auxiliary cutting edges are provided on the cutter rollers 72 and 81 as in the sixth to eighth embodiments, for example, in order to increase the dimensional accuracy of the cutting of the iron core piece 5, the cutting edge portion of the auxiliary cutting edge. If the edge of the blade edge portion is made to be a precipice-like vertical surface, the contact between the cutter rollers 72 and 81 and the receiving roller 27 is inclined, or the retraction of the material steel plate 22 is inclined. In such a case, a phenomenon occurs in which the raw steel plate 22 swings or moves in the lateral direction when cutting with the auxiliary cutting edge. Such lateral deflection of the steel plate 22 may cause a bending stress in the lateral direction to act on the auxiliary cutting edge (and the convex cutting edge 40), leading to chipping or chipping of the cutting edge. The ninth to twelfth embodiments solve such problems, and hereinafter, the ninth to twelfth embodiments will be described in order.

  As shown in FIG. 18, the auxiliary cutting edge 83 according to the ninth embodiment of the present invention is configured such that the tip of the tip has a chevron shape having inclined surfaces 83 a and 83 a symmetrically on both sides. As a result, when the material steel plate 22 is cut by the auxiliary cutting blade 83, the angled inclined surfaces 83a and 83a have an effect of pressing and fixing the material steel plate 22, and the effect of preventing the material steel plate 22 from sideways is obtained. . Therefore, it is possible to prevent unnecessary lateral bending stress from acting on the cutting edge of the auxiliary cutting edge 83 or the convex cutting edge 40 due to the lateral deflection of the raw steel plate 22, and the auxiliary cutting edge 83 and the convex cutting edge. It is possible to prolong the service life by preventing defects such as chipping of 40 cutting edges.

  As shown in FIG. 19, the auxiliary cutting edge 84 according to the tenth embodiment of the present invention is inclined on the side facing the opposite side to the convex cutting edge 40 out of the inclined surfaces 84 a and 84 b of the tip part of the tip. The inclination of the surface 84b is configured to be gentler than the inclination of the inclined surface 84a on the side facing the convex cutting edge 40. According to this, at the time of cutting with the auxiliary cutting edge 84, the inclined surface 84 b on the gentle side of the tip end portion of the auxiliary cutting edge 84, with respect to the material steel plate 22, the side opposite to the convex cutting edge 40 from the cut, that is, the iron core A force for pushing the remaining material 73 away from the piece 5 can be obtained, so that the core piece 5 and the remaining material 73 are more favorably separated.

  FIG. 20 shows an auxiliary cutting edge 85 according to an eleventh embodiment of the present invention, which differs from the auxiliary cutting edge 84 of the tenth embodiment in the following points. That is, the auxiliary cutting edge 85 of this embodiment has inclined surfaces 85a and 85b at the tip (blade edge) portion, but in the portion close to the convex cutting edge 40, the inclined surface of the blade edge portion. 85a and 85b are configured with relatively acute angles, and the inclination of the inclined surface 85b facing the opposite side of the convex cutting edge 40 gradually decreases as the distance from the convex cutting edge 40 increases. It is comprised so that it may become.

  Here, the auxiliary cutting edge 84 having the gently inclined surface 84b described in the tenth embodiment has a situation where the whole has to be relatively thick. When the shape of the shaped cutting blade 40 is, for example, a complicated curved shape, there arises a case where the auxiliary cutting blade 84 having a gently inclined surface at the tip cannot be disposed in space. Therefore, as in the present embodiment, if the inclined surface 85b is configured such that the inclination gradually decreases as the distance from the convex cutting edge 40 increases, even if the space near the convex cutting edge 40 is narrow, the convex shape A gently inclined surface 85b can be provided in a portion where the space is widened away from the cutting edge 40, and the core piece 5 and the remaining material 73 can be separated well.

  FIG. 21 shows an auxiliary cutting edge 86 according to a twelfth embodiment of the present invention, which differs from the auxiliary cutting edge 85 of the eleventh embodiment in the following points. That is, the auxiliary cutting edge 86 of this embodiment has the same shape as the auxiliary cutting edge 85 as a whole, but two parts 86a and 86b on the side closer to and far from the convex cutting edge 40. The material is made up of different materials. In this case, the portion 86a close to the convex cutting edge 40 is made of a material having high hardness such as cemented carbide, and the portion 86b far from the convex cutting edge 40 is relatively low in hardness such as tool steel but is tough. It is composed of high material.

  According to this, the portion 86a close to the convex cutting edge 40 in the auxiliary cutting edge 86, that is, the portion into which the raw steel plate 22 is cut, is made of a material with high hardness, so that the blade edge does not become dull and is subjected to a large load. It can be tolerable. On the other hand, the portion 86b of the auxiliary cutting blade 86 far from the convex cutting blade 40 places importance on the function of separating the remaining material 73 rather than the cutting function. By forming a simple inclined surface, it is easier to work and can be made cheaper than the case where the whole is made of a high hardness material.

  In addition, this invention is not limited to each Example mentioned above and shown in drawing, For example, as a structure of a cutting device, a cutter roller and a receiving roller are arranged side by side, and a raw steel plate is sent to an up-down direction. In addition, the core piece to be manufactured and thus the shape of the laminated core can be variously modified without departing from the gist, and can be implemented.

The 1st Example of this invention, and the side view which shows schematically the structure of the manufacturing apparatus of an iron core piece The perspective view from the feed direction downstream of the principal part of a clipping device FIG. 2 shows a second embodiment of the present invention and is equivalent to FIG. The top view which shows the relationship between the core piece for stator laminated cores and the core piece for rotor laminated cores The figure for demonstrating the procedure in the case of cutting continuously the core piece for rotor laminated cores, and the core piece for stator laminated cores Sectional view (a) of the cutter roller showing the third embodiment of the present invention, sectional view (b) of the cutter roller and the receiving roller part at the time of cutting out without providing an elastic body, when the elastic body is provided Sectional view (c) of the cutter roller and the receiving roller when cutting out The side view of the cutting device part which shows the 4th Example of this invention Sectional drawing of a cutter roller and a receiving roller part which shows the 5th Example of this invention Top view of core piece Enlarged longitudinal sectional view of the caulking part of the core piece Enlarged longitudinal sectional view of the core piece before bending (a) and after processing (b) FIG. 9 shows a sixth embodiment of the present invention and is equivalent to FIG. Plan view showing the shape of the surface of the cutter roller Plan view showing a cut formed in the steel plate Enlarged perspective view of the auxiliary cutting edge FIG. 15 equivalent diagram showing a seventh embodiment of the present invention. FIG. 13 equivalent view showing an eighth embodiment of the present invention. FIG. 15 equivalent view showing a ninth embodiment of the present invention. FIG. 15 equivalent diagram showing the tenth embodiment of the present invention. FIG. 15 equivalent view showing an eleventh embodiment of the present invention. FIG. 15 equivalent diagram showing a twelfth embodiment of the present invention. Plan view (a) of core piece for stator laminated core and perspective view (b) of stator laminated core The top view (a) of the core piece for stator laminated iron cores of different shapes and the perspective view of the stator laminated iron core (b) Plan view of core piece for rotor laminated core (a) and perspective view of rotor laminated core (b) Side view showing conventional manufacturing equipment

Explanation of symbols

  In the drawings, 1, 5, 8, 57 are iron core pieces, 4, 4 'are stator laminated iron cores, 9 are rotor laminated iron cores, 20 are coil materials, 22 are steel plates, 25, 41, 42 and 71 are iron cores. Single-cutting device, 26, 45, 54, 72 and 81 are cutter rollers, 27 and 52 are receiving rollers, 40 is a convex cutting blade, 44 is a collecting box, 48 is a trace hole, 50 is an elastic body, and 52a is magnetically attracted Part, 53 is a stopper, 55 is a half cutting edge, 58 is a caulking part, 60 is a raised and protruding piece part, 63 is a cut, 73 is a remaining material, 73a is a cut, 74, 75, 82, 83, 84, 85 are Auxiliary cutting blades 83a, 84a, 84b, 85a and 85b indicate inclined surfaces.

Claims (21)

A method for producing an iron core piece that is a component that is laminated to assemble a stator laminated iron core of a rotating electrical machine or a rotor laminated iron core,
Uncoiling the coil of the strip-shaped magnetic steel sheet as the material of the iron core piece and feeding the material steel sheet at a predetermined speed;
A cutter roller having a convex cutting edge that matches the shape of the iron core piece to be manufactured on the outer peripheral surface in a cylindrical shape and a receiving roller having a cylindrical outer shape and a smooth outer peripheral surface are opposed to each other with their peripheral surfaces abutting each other. Then, while rotating both rollers in opposite directions and sandwiching the fed steel plate between the two rollers, the steel strip is cut with the convex cutting blade of the cutter roller to cut out the core piece. Cutting process,
A collecting step of integrating The sections pulled the core pieces in the collection box, it was perforated,
An elastic body having a thickness smaller than the height of the convex cutting blade is fixed to the outer peripheral surface of the cutter roller where the convex cutting edge is not provided,
In the cutting-out process, the warp deformation of the iron core piece is regulated by the elastic body coming into contact with the material steel plate . On the outer peripheral surface of the cutter roller, there are a first convex cutting blade having a shape that matches the shape of the iron core piece that is a part for assembling the stator laminated iron core, and an iron core piece that is a part for assembling the rotor laminated iron core. There are provided one or more second convex cutting blades each having a shape matching the shape,
2. In the cutting step, one or more core pieces for the stator laminated core and one or more core pieces for the rotor laminated core are cut out during one rotation of the cutter roller. The manufacturing method of the iron core piece for rotary electric machines of description. Two pairs of cutter rollers and receiving rollers are installed in series in the feed direction of the material steel plate,
In the cutting step, the disk-shaped iron core piece for the rotor laminated iron core is cut out by the upstream pair of rollers, and the disk-shaped iron core piece is cut out by the downstream pair of rollers. 2. The method of manufacturing a core piece for a rotating electrical machine according to claim 1, wherein an annular core piece for the stator laminated core is cut out from the material steel plate. The receiving roller is installed on the lower side of the cutter roller, and a magnetic attraction force is applied to the outer peripheral surface layer portion of the receiving roller, and further contacts or approaches the surface of the lower side portion of the receiving roller. The stopper is provided,
In the cutting step, the cut iron core piece is rotated and lowered while being magnetically attracted to the receiving roller. The method of manufacturing a core piece for a rotating electrical machine according to any one of claims 1 to 3, wherein the peeled off core pieces are accumulated in the accumulation box . In addition to the convex cutting blade, the cutter roller is provided with a half cutting blade for making a half-cut into the material steel plate,
5. The cutout process according to claim 1, wherein, in the cutting step, a half-cut notch is formed at a predetermined position of the core piece by the half-cutting blade simultaneously with the cutting of the core piece . A method of manufacturing a core piece for a rotating electrical machine. In addition to the convex cutting blade, the cutter roller is provided with an auxiliary cutting blade that forms a cut with respect to the remaining material obtained by cutting the iron core piece of the material steel plate around the convex cutting blade. ,
6. The manufacturing of a core piece for a rotating electrical machine according to claim 1 , wherein, in the cutting step, a cut is formed in the remaining material by the auxiliary cutting blade simultaneously with the cutting of the core piece. Method. An apparatus for producing a core piece, which is a component that is laminated and assembled into a stator laminated iron core of a rotating electrical machine or a rotor laminated iron core,
A feeding device that uncoils the coil of the strip-shaped magnetic steel plate that is the material of the iron core piece and feeds the material steel plate at a predetermined speed;
A cylindrical roller having a convex cutting edge that matches the shape of the iron core piece manufactured on the outer peripheral surface thereof and a cylindrical roller and a receiving roller having a smooth outer peripheral surface face each other with their peripheral surfaces abutting each other. The two steel rollers are rotated in opposite directions so that the steel plate is drawn between the two rollers, and the steel plate is pressed by the convex cutting blade of the cutter roller. A cutting device for cutting,
An accumulation box for accumulating the cut iron pieces;
An elastic body for warpage deformation regulation having a thickness dimension smaller than the height dimension of the convex cutting blade is fixed to an outer peripheral surface of the cutter roller where the convex cutting edge is not formed. Manufacturing equipment for rotating electrical machine core pieces. On the outer peripheral surface of the cutter roller, there are a first convex cutting blade having a shape that matches the shape of the iron core piece that is a part for assembling the stator laminated iron core, and an iron core piece that is a part for assembling the rotor laminated iron core. The apparatus for manufacturing a core piece for a rotating electrical machine according to claim 7, wherein one or a plurality of second convex cutting blades each having a shape matching the shape are provided . In the cutting device, two pairs of cutter rollers and receiving rollers are installed in series in the feed direction of the material steel plate,
Among them, the cutter roller of the upstream pair of rollers is provided with a convex cutting blade for cutting out the disk-shaped iron core piece for the rotor laminated core, and the cutter roller of the pair of rollers on the downstream side includes: A convex cutting blade is provided for cutting out the annular core piece for the stator laminated core from the material steel plate around the trace hole from which the disc-shaped core piece has been cut out. Item 8. A manufacturing apparatus of an iron core piece for a rotating electrical machine according to Item 7 . The receiving roller is installed on the lower side of the cutter roller, and an outer surface layer portion of the receiving roller is provided with a magnetic attracting force for magnetically attracting the cut iron core piece and carrying it downward. ,
A stopper is provided to peel off the core piece from the receiving roller when the lowered iron core piece comes into contact with or approaches the surface of the lower portion of the receiving roller. Item 10. An apparatus for manufacturing an iron core piece for a rotating electrical machine according to any one of Items 7 to 9 In addition to the convex cutting blade, the cutter roller is provided with a half cutting blade for forming a half-cut in a predetermined portion of the iron core piece simultaneously with the cutting of the iron core piece. The manufacturing apparatus of the core piece for rotary electric machines in any one of Claims 7 thru | or 10 . In the cutter roller, in addition to the convex cutting blade, a cut is formed in the periphery of the convex cutting blade with respect to the remaining material obtained by cutting the core piece of the material steel plate simultaneously with the cutting of the iron core piece. The auxiliary cutting edge is provided , The manufacturing apparatus of the core piece for rotary electric machines in any one of Claim 7 thru | or 11 characterized by the above-mentioned . The said auxiliary cutting blade is extended and provided in the direction inclined with respect to the circumferential direction of the said cutter roller, The manufacturing apparatus of the core piece for rotary electric machines of Claim 12 characterized by the above-mentioned . The said auxiliary cutting blade is integrally formed in the said convex cutting blade, The manufacturing apparatus of the core piece for rotary electric machines of Claim 12 or 13 characterized by the above-mentioned . The said auxiliary cutting blade is provided separately from the said convex cutting blade, The manufacturing apparatus of the core piece for rotary electric machines of Claim 12 or 13 characterized by the above-mentioned . 16. The apparatus for manufacturing a core piece for a rotating electrical machine according to claim 12, wherein the tip of the auxiliary cutting edge is formed in a mountain shape having inclined surfaces on both sides . Of the inclined surface of the tip of the auxiliary cutting edge, the inclination of the surface facing away from the convex cutting edge is made gentler than the inclination of the surface facing the convex cutting edge. The apparatus for manufacturing a core piece for a rotating electrical machine according to claim 16, wherein the apparatus is configured. Of the inclined surface of the tip of the auxiliary cutting edge, the inclination of the surface facing the side opposite to the convex cutting edge is configured so as to gradually decrease as the distance from the convex cutting edge increases. The manufacturing apparatus of the core piece for rotary electric machines of Claim 16 or 17 characterized by these . The side close to the convex cutting edge among the auxiliary cutting edges is made of a material having high hardness, and the side far from the convex cutting edge is made of a material having high toughness. Item 19. An apparatus for manufacturing a core piece for a rotating electrical machine according to any one of Items 12 to 18 . The number of blades, which are arranged along a line extending in the width direction of the cutter roller, plus the convex cutting blade and the auxiliary cutting blade is the cutting edge limit at any position in the circumferential direction of the cutter roller. The apparatus for manufacturing a core piece for a rotating electrical machine according to any one of claims 12 to 19, wherein the apparatus is configured to fall within a proof stress . The number of blades, which are arranged along a line extending in the width direction of the cutter roller, including the convex cutting blade and the auxiliary cutting blade, is configured to be substantially the same in the circumferential direction of the cutter roller. The manufacturing apparatus of the core piece for rotary electric machines of Claim 20 characterized by the above-mentioned .

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