JP2006136178A - Manufacturing method of stacked stator core - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a stacked stator core, with which the stacked stator core superior in shape accuracy and an electrical characteristic can be manufactured. <P>SOLUTION: The method comprises a process of punching and forming a yoke of the stacked stator core as a belt-like yoke core piece 11 which shows a shape developed into a line shape, has coupling recesses 11a in a side edge, equivalent to an inner circumference 11i and planar arc-like caulking parts 11c bent along a winding direction are arranged at equal intervals from a metal plate; a process of engaging a caulking tongue piece of the ark-like caulking part into a caulking groove of the ark-like caulking part at a lower layer and caulking the connecting them, while the belt-like yoke core piece is wound spirally and is stacked so as to form a yoke stacked body; a process of punching and forming the magnetic pole core, having a coupling projection at a base end from the metal plate; a process of stacking a prescribed number of magnetic pole core pieces and caulking/connecting them and forming a magnetic pole stacked body, and a process of winding a wire on the magnetic pole stacked body, engaging the coupling projection into the coupling recess and coupling the yoke stacked body and the magnetic pole stacked body. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

    The present invention relates to a method of manufacturing a laminated stator core, and more particularly to a method of manufacturing a laminated stator core to which a configuration in which strip-shaped core pieces are wound in a spiral manner and stacked on each other is applied.

    Large-sized laminated cores incorporated in drive motors that generate high horsepower are used.When manufacturing such large-sized laminated cores, for example, laminated stator cores, large-scale manufacturing equipment (molding equipment) ) Is required, resulting in high costs, and further, there is a problem in that the yield when cutting the core material is greatly reduced.

  As a technique for solving the above inconvenience, by punching and forming a strip-shaped core piece having a shape in which a laminated stator core is linearly expanded from a metal plate, the strip-shaped core pieces are spirally wound and laminated together, A method of manufacturing a laminated stator core is provided (see, for example, Patent Document 1).

  A laminated stator core A shown in FIG. 12 includes a yoke Y having a cylindrical shape and a predetermined number of salient poles T, T... Projecting radially inward from the yoke Y, and has a belt-like core as shown in FIG. A strip-shaped core piece S in which magnetic pole portions St, St... Are formed on a side edge corresponding to the inner periphery of the yoke portion Sy that extends in a straight line is wound and laminated along the outer periphery of the guide G. It is manufactured by pressing the stacked strips S, S... From above and below and crimping them together or fixing them together by welding.

According to such a method of manufacturing a laminated stator core, a large-scale manufacturing apparatus (molding apparatus) is not required, and the yield when cutting the core material is improved, so that the cost related to manufacturing is increased. It can be avoided.
JP-A-11-299136

    By the way, in the conventional manufacturing method as described above, since the planar shape of the strip-shaped core piece S constituting the laminated stator core A is extremely complicated, there is a variation in the degree of deformation at each place when it is spirally wound. It is difficult to wind the strip-shaped iron core piece S into a perfect circle due to factors such as the occurrence of the magnetic field. Further, since it is easy to cause a deviation between the stacked magnetic pole portions St, St. There has been a problem that the accuracy of the shape of the laminated stator core A is greatly reduced.

  Further, in the conventional manufacturing method as described above, the yoke Y and the magnetic poles T, T... In the laminated stator core A are integrally formed, so that it is difficult to wind the winding around the individual magnetic poles T. There is a disadvantage in that the electrical characteristics are deteriorated due to the disturbance of the winding.

  An object of the present invention is to provide a method of manufacturing a laminated stator core capable of producing a laminated stator core excellent in shape accuracy and electrical characteristics in view of the above-described actual situation.

    In order to achieve the above object, a method for manufacturing a laminated stator core according to the invention of claim 1 is a method of manufacturing a magnetic pole laminated body in which magnetic pole core pieces are caulked and laminated on a yoke laminated body in which a belt-shaped yoke iron core piece is wound and laminated. A method of manufacturing a laminated stator core assembled to each other, wherein the laminated stator core has a shape in which the yoke of the laminated stator core is linearly developed, and has a connecting recess on the side edge corresponding to the inner periphery, and is curved along the winding direction. A step of punching and forming a strip-shaped yoke core piece having flat arc-shaped crimped portions arranged at equal intervals from a metal plate, and winding and laminating the strip-shaped yoke core pieces spirally, A step of forming a yoke laminate by inserting a tongue piece into a caulking groove of an arcuate caulking portion of the lower layer and caulking and connecting, and a step of punching and forming a magnetic pole core piece having a connecting convex portion at a base end from a metal plate; , Magnetic pole iron A step of laminating a predetermined number of pieces and caulking them together to form a magnetic pole laminate, and winding the magnetic pole laminate, and then inserting a connecting convex portion into the connecting recess, and the yoke laminate and the magnetic pole laminate And a step of connecting the body to each other.

  The manufacturing method of the laminated stator core according to the invention of claim 2 is the manufacturing method of the laminated stator core according to claim 1, wherein the caulking tongue piece in the arc-shaped caulking portion winds the strip-shaped yoke iron core piece. It is characterized by being inclined downward in the direction opposite to the traveling direction.

  The manufacturing method of the laminated stator core according to the invention of claim 3 is the manufacturing method of the laminated stator core according to claim 1, wherein the crimping tongue piece in the arc-shaped caulking portion winds the strip-shaped yoke core piece. It is characterized by a downward slope toward the traveling direction.

  According to a fourth aspect of the present invention, there is provided a laminated stator core manufacturing method according to the first aspect of the present invention, wherein the magnetic pole core piece constituting the magnetic pole laminated body is formed into a strip shape constituting the yoke laminated body. It is characterized by being formed from a low iron loss material with less iron loss than the yoke core piece.

According to the method for manufacturing a laminated stator core according to the invention of claim 1, the yoke laminate constituting the yoke of the laminated stator core and the magnetic pole laminate constituting the magnetic pole of the laminated stator core are separately formed. Therefore, the strip-shaped yoke core piece constituting the yoke laminate has a relatively narrow strip shape, and a connecting recess is formed on the side edge corresponding to the inner periphery of the strip-shaped yoke core piece. The bend formability of the strip-shaped yoke core pieces is greatly improved, and the yoke laminate formed by winding the strip-shaped yoke core pieces can be formed into a perfect circle.
In addition, the arc-shaped caulking portion formed on the strip-shaped yoke core piece is formed into a planar shape curved along the winding direction, so that when the strip-shaped yoke core pieces are stacked while being spirally wound, The caulking tongue piece in the caulking portion is inserted in a manner in which the winding of the belt-like yoke core piece is guided along the caulking groove in the arcuate caulking portion of the lower layer. As a result, the yoke laminate can be formed into a more perfect circle.
Further, since the magnetic pole laminate is formed by caulking and laminating a predetermined number of magnetic pole core pieces, the magnetic pole laminate is manufactured without causing a gap between the laminated magnetic pole core pieces, and thus the yoke laminate is formed in the yoke laminate. A laminated stator core formed by connecting a predetermined number of magnetic pole laminates has excellent shape accuracy.
Furthermore, since the magnetic pole laminate is formed separately from the yoke laminate, the winding work for the magnetic pole laminate becomes extremely easy, and the winding can be wound with high density and good proportions. can do.
Thus, according to the method for manufacturing a laminated stator core according to the invention of claim 1, it is possible to produce a laminated stator core excellent in shape accuracy and electrical characteristics.

  According to the manufacturing method of the laminated stator core related to the invention of claim 2, the caulking tongue piece in the arc-shaped caulking portion is inclined downward in the direction opposite to the winding direction of the belt-like yoke iron core piece. When caulking and laminating the yoke core pieces while spirally winding, the upper caulking tongue piece gradually enters the lower caulking groove from the base end to the tip, and the entire caulking tongue piece is against the caulking groove. By securely fitting, it is possible to form a yoke laminate having high bonding strength.

  According to the method of manufacturing the laminated stator core according to the invention of claim 3, the band-shaped yoke core piece is formed by setting the crimping tongue piece in the arc-shaped crimping portion to be inclined downward in the winding direction of the band-shaped yoke core piece. When the layers are crimped while being spirally wound, the tip of the upper caulking tongue first enters the lower caulking groove, and then gradually enters the base end, so that the entire caulking tongue is caulked. It is possible to smoothly and surely fit into the groove, thereby forming a yoke laminate having a high bonding strength.

  According to the method of manufacturing a laminated stator core according to the invention of claim 4, the magnetic core piece constituting the magnetic pole laminate is made of a low iron loss material having less iron loss than the belt-like yoke core piece constituting the yoke laminate. Thus, it is possible to achieve further higher efficiency and energy saving of the laminated stator core in which the magnetic pole laminate is assembled to the yoke laminate.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
FIGS. 1-7 has shown one Example in the manufacturing method of the laminated stator core concerning this invention, and the laminated stator core 1 manufactured based on this invention is one yoke which exhibits a ring shape. The laminated body 10 and a predetermined number (12 in the embodiment) of magnetic pole laminated bodies 20, 20...

  The yoke laminate 10 is formed by spirally winding and laminating strip-shaped yoke core pieces 11 formed by stamping from a strip-shaped steel plate (metal plate) as will be described later, and by caulking and bonding (caulking stacking) to each other. A predetermined number (12 in the embodiment) of connecting recesses 11a, 11a,... Are formed on the inner peripheral edge of the yoke laminate 10.

  The belt-shaped yoke core pieces 11 are formed with arc-shaped crimping portions 11c, 11c, etc., which will be described in detail later. The stacked belt-shaped yoke core pieces 11 are arranged via the arc-shaped crimping portions 11c. Are connected with each other.

  On the other hand, the magnetic pole laminate 20 is formed by laminating a predetermined number of magnetic pole core pieces 21, 21... Punched and formed from a strip-shaped steel plate (metal plate) as will be described later and caulking them together (caulking laminating). In addition, at the base end of each magnetic pole laminate 20, a connecting convex portion 21a that fits with the connecting concave portion 11a of the yoke laminate 10 described above is formed. In addition, the code | symbol 21c in a figure is the crimping part formed in each magnetic pole core piece 21,21 ....

  The magnetic pole core pieces 21, 21... Constituting the magnetic pole laminate 20 are low iron loss materials having a lower iron loss than the belt-like yoke core pieces 11 constituting the yoke laminate 10, specifically, the belt-like yokes. When the iron core piece 11 is formed from an electromagnetic steel plate, it is formed from a low iron loss material such as a thin electromagnetic steel plate having a lower iron loss than that of the electromagnetic steel plate or an amorphous metal thin plate.

  The above-mentioned yoke laminated body 10 and the magnetic pole laminated bodies 20, 20... Are integrally connected by fitting the coupling convex portions 21a of the individual magnetic pole laminated bodies 20 into the respective connected concave portions 11a, 11a. As a result, the laminated stator core 1 having a predetermined shape in which a predetermined number of magnetic pole laminates 20, 20... Protrude in the inner diameter direction of the yoke laminate 10 is manufactured.

Below, the manufacturing method of the lamination | stacking stator core which concerns on this invention is demonstrated in detail by exemplifying the manufacturing procedure of the lamination | stacking stator core 1 mentioned above.
First, as shown in FIG. 3A, the strip-shaped yoke core pieces 11 are formed by stamping from a strip-shaped steel plate (metal plate) not shown.

  The strip-shaped yoke core piece 11 has a shape in which the yoke of the laminated stator core 1 described above is linearly expanded, specifically, a narrow strip shape that extends straight, and has a side edge 11i corresponding to the inner periphery thereof. That is, when the strip-shaped yoke iron core piece 11 is wound in the subsequent process, the connecting recesses 11a, 11a,... Are formed at a predetermined pitch on the portion constituting the inner peripheral surface of the yoke laminate 10 (see FIG. 2). An array is formed.

  Here, the formation pitch of the connecting recesses 11a, 11a... Is set so that the connecting recesses 11a coincide with each other when the strip-shaped yoke core pieces 11 are spirally wound and stacked in a later step. .

Further, arc-shaped caulking portions 11c, 11c,... Are arranged at a predetermined pitch in a substantially central region in the width direction of the strip-shaped yoke core piece 11.
As shown in FIG. 4, the arc-shaped crimping portion 11c has a crimping tongue piece 11t protruding downward by half blanking, and a crimping groove 11r formed on the back portion of the crimping tongue piece 11t. .

  The arc-shaped crimping portion 11c (the crimping tongue 11t and the crimping groove 11r) is in the winding direction (arrow R), that is, the direction in which the strip-shaped yoke core piece 11 is wound in a later step, in other words, the completed yoke. The laminated body 10 (see FIGS. 1 and 2) has a planar shape that is curved along the circumferential direction in which the arcuate caulking portions 11c, 11c,.

  Further, as shown in FIG. 4, the arcuate crimping portion 11c has the crimping tongue piece 11t lowered in the direction opposite to the traveling direction (arrow F) when the strip-shaped yoke iron core piece 11 is wound in the subsequent process. Inclined.

  Here, the formation pitch of the arcuate caulking portions 11c, 11c is such that the arcuate caulking portions 11c coincide with each other when the belt-like yoke core pieces 11 are spirally wound and stacked in a later step. Is set.

  After the strip-shaped yoke core piece 11 is formed by stamping from a strip-shaped steel plate (metal plate), the strip-shaped yoke core piece 11 is carried into a manufacturing apparatus (not shown), and as shown in FIG. Are stacked in a spiral shape, and are joined together via the arcuate crimping portions 11c, 11c... To form a yoke laminate 10 having a predetermined shape (see FIG. 2B).

  Specifically, one end of the strip-shaped yoke core piece 11 is locked to the winding guide G of the manufacturing apparatus, and the strip-shaped yoke core piece 11 is rotated as indicated by the arrow R while being loaded into the winding guide G as indicated by the arrow F. 2B is formed by winding the strip-shaped yoke core pieces 11 around the outer periphery of the winding guide G, and joining the stacked strip-shaped yoke core pieces 11 to each other by the arc-shaped crimped portions 11c, 11c. A yoke laminate 10 having a predetermined shape as shown in FIG.

  Here, the strip-shaped yoke core piece 11 constituting the yoke laminate 10 has a narrow strip shape as described above, and the connection recesses 11a, 11a,. Therefore, the bending workability is very good, and it becomes possible to form the yoke laminate 10 formed by winding the belt-like yoke core piece 11 in a perfect circle.

  Incidentally, the connecting concave portion 11a of the strip-shaped yoke core piece 11 is formed with a curved inner side as shown in FIG. 3 (c), and the inner side and the side side are connected with a curved line, and the inner side is continuously rounded. By adopting the shape, the bending workability (winding formability) is further improved.

  Further, the arc-shaped caulking portion 11c formed on the strip-shaped yoke core piece 11 is formed into a planar shape curved along the winding direction (arrow R), so that the strip-shaped yoke core piece 11 is laminated while being spirally wound. In this case, the crimping tongue piece 11t in the upper arc-shaped caulking portion 11c is inserted in a manner in which the winding of the strip-shaped yoke iron core piece 11 is guided along the caulking groove 11r in the lower arc-shaped caulking portion 11c. Therefore, the formability of the strip-shaped yoke core piece 11 during winding is improved, and the yoke laminate 10 can be formed in a more perfect circle.

  Further, the band-shaped yoke core piece 11 is spirally wound by setting the crimp tongue piece 11t in the arc-shaped crimped portion 11c to be inclined downward in the direction opposite to the winding direction (arrow F) of the band-shaped yoke core piece 11. When laminating while rotating, as shown in FIGS. 5 (a) and 5 (b), the upper caulking tongue piece 11t gradually enters the lower caulking groove 11r from the proximal end to the distal end, By securely fitting the entire piece 11t to the caulking groove 11r, it is possible to form the yoke laminate 10 having a high bonding strength.

  On the other hand, as shown in FIG. 6A, a magnetic pole laminate 20 is formed from a strip steel plate (metal plate) W through processing stations S1 to S3 of a transfer press (not shown).

  That is, after the pilot hole P is formed at the processing station S1 and the crimping portion 21c is formed at the processing station S2, the magnetic pole core piece 21 is removed and caulked and stacked at the processing station S3 to form the magnetic pole laminate 20 (FIG. 6 ( b)).

  In addition, it cannot be overemphasized that the manufacturing procedure of the magnetic pole laminated body 20 using a transfer press is not limited to the Example mentioned above, It can set suitably.

  Here, since the magnetic pole laminated body 20 is formed by caulking and laminating the magnetic pole core pieces 21, 21... As described above, the magnetic pole laminated body 20 is manufactured without causing a gap between the laminated magnetic pole core pieces 21. Therefore, the laminated stator core 1 formed by connecting the magnetic pole laminate 20 to the yoke laminate 10 has excellent shape accuracy.

  Further, since the magnetic pole laminate 20 is formed separately from the above-described yoke laminate 10, the yield when the magnetic core pieces 21, 21... Are stripped from the strip steel plate (metal plate) W is improved. Therefore, it is possible to avoid an increase in manufacturing cost.

  Further, the magnetic pole laminated body 20 is made from a low iron loss material that has less iron loss than the strip-shaped yoke iron core pieces 11 constituting the yoke laminated body 10. As a result, it is possible to achieve further higher efficiency and energy saving of the laminated stator core 1 formed by assembling the magnetic pole laminates 20, 20... To the yoke laminate 10.

  After the magnetic pole laminate 20 is manufactured as described above, the winding L is wound around the magnetic pole laminate 20 using a dedicated device (not shown) as shown in FIG. In addition to winding the winding L directly around the magnetic pole laminate 20, a bobbin (not shown) around which the winding L is wound may be attached to the magnetic pole laminate 20 in a separate process. Needless to say.

  Here, when winding the winding L around the magnetic pole laminate 20, the magnetic pole laminate 20 is separated from the yoke laminate 10, so that the winding operation of the winding L around the magnetic pole laminate 20 is extremely easy. As a result, the winding L is wound with high density and good proportion.

  After the winding of the winding L around the predetermined number of magnetic pole laminates 20 is completed, as shown in FIGS. 7A and 7B, the magnetic pole laminate 20 with respect to the connecting recess 10 a in the yoke laminate 10. By fitting the connecting projections 20 a in the direction of the axis of the yoke laminate 10, the yoke laminate 10 and the magnetic pole laminate 20 are connected and fixed to each other.

  As described above, the coupling convex portion 21a of the magnetic pole laminate 20 is fitted into the coupling concave portion 11a of the yoke laminate 10, and the yoke laminate 10 and the magnetic pole laminate 20 are coupled and fixed to each other, whereby a laminated stator having a predetermined shape is obtained. As the iron core 1 is manufactured, the stator of the motor in which the winding L is wound around the magnetic pole laminates 20, 20... Of the laminated stator iron core 1 is completed.

  Thus, according to the manufacturing method of the laminated stator core concerning this invention, it becomes possible to manufacture the laminated stator core 1 excellent in the shape precision and the electrical property.

  FIGS. 8 to 10 show another embodiment of the strip-shaped yoke iron core piece 11, and the arc-shaped caulking portions 11c ′ and 11c are formed at a predetermined pitch in a substantially central region in the width direction of the strip-shaped yoke iron core piece 11. FIG. ′... Are arranged.

  As shown in FIG. 9, the arc-shaped crimping portion 11c 'includes a crimping tongue piece 11t' formed to project downward by half blanking and a crimping groove 11r 'formed on the back portion of the crimping tongue piece 11t'. Have.

  Further, the arc-shaped crimping portion 11c ′ (the crimping tongue piece 11t ′ and the crimping groove 11r ′) is curved along the winding direction (arrow R), that is, the direction in which the strip-shaped yoke iron core piece 11 is wound in a later step. It has a flat shape.

  Further, as shown in FIG. 9, the arc-shaped crimping portion 11c ′ is inclined so that the crimping tongue piece 11t ′ is lowered toward the advancing direction (arrow F) when the strip-shaped yoke iron core piece 11 is wound in the subsequent process. Is formed.

  The arcuate crimping portions 11c ′, 11c ′,... Are formed so that the arcuate crimping portions 11c ′ coincide with each other when the strip-like yoke core pieces 11 are spirally wound and stacked in a later step. Is set to

  The strip-shaped yoke core piece 11 is carried into a manufacturing apparatus (not shown), and the strip-shaped yoke core pieces 11 are spirally wound and stacked as shown in FIG. The yoke stack 10 having a predetermined shape (see FIG. 2B) is formed by caulking and coupling with each other via 11c '.

  Here, the arc-shaped caulking portion 11c ′ formed on the strip-shaped yoke core piece 11 is formed into a planar shape curved along the winding direction (arrow R), so that the strip-shaped yoke core piece 11 is spirally wound. When stacking, the caulking tongue piece 11t ′ in the upper arc-shaped caulking portion 11c ′ guides the winding of the strip-shaped yoke iron core piece 11 along the caulking groove 11r ′ in the lower arc-shaped caulking portion 11c ′. Thus, the formability of the strip-shaped yoke core piece 11 during winding is improved, and the yoke laminate 10 can be formed in a more perfect circle.

  Furthermore, the band-like yoke core piece 11 is spirally wound by setting the crimping tongue piece 11t 'in the arc-like crimping part 11c' to be inclined downward in the winding direction (arrow F) of the band-like yoke core piece 11. While crimping, as shown in FIGS. 10A and 10B, the upper end of the upper caulking tongue piece 11t ′ first enters the lower caulking groove 11r ′ and then extends to the base end. By gradually entering, the entire crimping tongue piece 11t ′ can be smoothly and reliably fitted into the crimping groove 11r ′, thereby forming the yoke laminate 10 having a high bonding strength.

  FIG. 11 shows still another embodiment of the strip-shaped yoke core piece 11. In the substantially central region in the width direction of the strip-shaped yoke core piece 11, arc-shaped caulking portions 11 c ″, 11 c ″. Are arranged.

  The arc-shaped crimping portion 11c ″ has a crimping tongue piece 11t ″ projecting downward by half blanking and a crimping groove 11r ″ formed on the back portion of the crimping tongue piece 11t ″. (Arrow R), that is, a planar shape curved along the direction in which the strip-shaped yoke iron core piece 11 is wound in a later step.

  Further, the caulking tongue piece 11t ″ of the arcuate caulking portion 11c ′ includes a portion that is inclined downward toward the advancing direction (arrow F) when the strip-shaped yoke iron core piece 11 is wound in a later step, and the advancing direction. It is formed in an inverted trapezoidal shape having (arrow F) and a portion inclined downward in the opposite direction.

  The arcuate crimping portions 11c ″, 11c ″... Are formed so that the arcuate crimping portions 11c ″ coincide with each other when the strip-shaped yoke core pieces 11 are spirally wound and stacked in a later step. Is set to

  As described above, the arc-shaped caulking portion 11c ″ formed in the strip-shaped yoke core piece 11 is formed into a planar shape curved along the winding direction (arrow R), so that the strip-shaped yoke core piece 11 during winding is formed. Formability is improved, so that the yoke laminate 10 can be formed in a more perfect circle.

  Further, by forming the crimping tongue 11t ″ in the arcuate crimping portion 11c ″ in an inverted trapezoidal shape, the arcuate crimping shown in FIG. As the portion 11c and the arcuate crimping portion 11c ′ shown in FIG. 10 are combined, the crimping tongue piece 11t ″ functions so that the entire crimping tongue piece 11t ″ is smooth with respect to the crimping groove 11r ″. It is possible to form the yoke laminated body 10 having a high fitting strength by securely fitting.

  In each of the above-described embodiments, a laminated stator core composed of a yoke laminated body having a ring shape and 12 magnetic pole laminated bodies is illustrated, but the present invention is limited to the production of the laminated stator core described above. Of course, the present invention can be effectively applied as a method of manufacturing laminated stator cores having various configurations.

(a) And (b) is the whole top view and whole side view which show one Example of the lamination | stacking stator core manufactured by applying the method concerning this invention. (a) And (b) is an external appearance perspective view of the magnetic pole laminated body and yoke laminated body which comprise the laminated stator core shown in FIG. (a) And (b) is a conceptual diagram which shows the manufacturing procedure of the yoke laminated body in the lamination | stacking stator core shown in FIG. 1, (c) is a principal part top view which shows the other Example of a strip | belt-shaped yoke core piece. (a) And (b) is a principal part top view and principal part sectional drawing of the strip | belt-shaped yoke iron core piece which shows an arc-shaped caulking part. (a) And (b) is a conceptual diagram which shows the aspect which an arc-shaped caulking part couple | bonds. (a), (b) and (c) are the conceptual diagrams which show the manufacture procedure of the magnetic pole laminated body in the lamination | stacking stator core shown in FIG. (a) And (b) is a conceptual diagram which shows the manufacturing procedure of the lamination | stacking stator core shown in FIG. (a) And (b) is a conceptual diagram which shows the manufacturing procedure of the yoke laminated body from which the form of an arc-shaped caulking part differs, (c) is a principal part top view which shows the other Example of a strip | belt-shaped yoke core piece. (a) And (b) is a principal part top view and principal part sectional drawing of the strip | belt-shaped yoke iron core piece which shows an arc-shaped caulking part. (a) And (b) is a conceptual diagram which shows the aspect which an arc-shaped caulking part couple | bonds. (a) And (b) is a principal part top view and principal part sectional drawing of the strip | belt-shaped yoke iron core piece which shows another form of an arc-shaped caulking part. (a) And (b) is the whole top view and principal part cross-section side view which show the laminated stator core manufactured by the prior art. The conceptual diagram which shows the manufacturing method of the lamination | stacking stator core shown in FIG.

Explanation of symbols

1 ... Laminated stator core,
10 ... Yoke laminate,
11 ... strip-shaped yoke iron core piece,
11i ... Inner circumference equivalent side edge,
11a: Connection recess,
11c, 11c ', 11c "... caulking part,
11t, 11t ', 11t "... caulking tongue piece,
11r, 11r ', 11r "... caulking groove,
20 ... magnetic pole laminate,
21 ... Magnetic core pieces,
21a ... connecting convex part,
21c ... crimping part,
L ... Winding,
W: Strip steel plate (metal plate).

Claims (4)

A method of manufacturing a laminated stator core comprising assembling a magnetic pole laminate obtained by caulking and laminating magnetic pole core pieces to a yoke laminated body obtained by winding a belt-like yoke iron core piece and caulking,
The shape of the yoke of the laminated stator core is linearly expanded, and there are connecting recesses on the side edges corresponding to the inner circumference, and flat arc-shaped caulking parts curved along the winding direction are arranged at equal intervals. Punching and forming the strip-shaped yoke iron core piece from the metal plate;
While the belt-like yoke core pieces are wound and laminated spirally, the crimping tongue piece of the arcuate caulking part is fitted into the caulking groove of the arcuate caulking part of the lower layer to form a yoke laminate. Process,
A step of punching and forming a magnetic pole core piece having a connecting convex portion at the base end from a metal plate;
A step of laminating a predetermined number of the magnetic core pieces, and caulking together to form a magnetic pole laminate;
A step of connecting the yoke stack and the magnetic pole stack to each other by fitting the connecting convex in the connecting recess after winding the magnetic pole stack;
The manufacturing method of the laminated stator core characterized by comprising. 2. The laminated stator core according to claim 1, wherein the arcuate crimping portion has the caulking tongue piece inclined downward in a direction opposite to a traveling direction when the strip-shaped yoke core piece is wound. Manufacturing method. 2. The method of manufacturing a laminated stator core according to claim 1, wherein the arcuate crimping portion is inclined so that the crimping tongue piece is lowered in a traveling direction when the strip-shaped yoke core piece is wound. . The magnetic pole core piece constituting the magnetic pole laminate is formed of a low iron loss material having less iron loss than the belt-like yoke core piece constituting the yoke laminate. Item 4. The method for manufacturing a laminated stator core according to any one of Items 3 to 4.

Images