JPH09308143A - Material of core of rotary machine and manufacture of the core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a core material of a rotary machine which uses a magnetic steel plate of a high yield as a material for processing and which can be processed with a little processing force and which requires a relatively few assembly processes for a core and which realizes a good performance of a magnetic circuit and also provide a method for manufacturing a core. SOLUTION: Teeth 4 is formed at specified intervals on one side of a belt-like magnetic steel plate. In part of the magnetic steel plate which are located between each two adjacent teeth 4, tapered cutouts 6 are formed from one side where the teeth are formed toward the other side. Where the number of the teeth 4 is α, an opening angle 73 of each cutout 6 is set to 360/α. Because of the existence of the cutouts 6, only a little force is required for processing. Although there are the cutouts 6, a good magnetic circuit is formed since two sides 6a, 6b which constitute the cutout 6 are brought into contact with each other when the plate is actually used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary electric machine core in which magnetic steel sheets are laminated and a method for manufacturing the same.

[0002]

2. Description of the Related Art A stator core of a rotary electric machine is manufactured by any of the following methods. First manufacturing method: A manufacturing method in which a magnetic steel plate is punched into an annular shape by press working to form a sheet core, and the sheet cores are laminated to form a tubular stator core.

Second manufacturing method: When manufacturing a stator core having a cylindrical finished shape, a plurality of core blocks are formed in the circumferential direction, and the plurality of core blocks are abutted to form a stator core. The core block is formed by punching a magnetic steel sheet by pressing to form a sheet core piece and stacking the sheet core pieces.

Third manufacturing method ... A magnetic steel sheet is punched into a band shape by stamping to form a core material, and the core material is plastically deformed into an annular stack to form a tubular stator core. .

Fourth manufacturing method: A manufacturing method in which a long magnetic steel plate is rolled up into a tubular shape and the magnetic steel plate is plastically deformed by this winding up to form a stator core. Fifth manufacturing method ..... US Pat.
In Japanese Patent Laid-Open No. 7-79551, when a strip-shaped material is formed into an annular shape to form a core sheet, a notch is formed in a part of the strip-shaped material so that the strip-shaped material can be easily bent into an annular shape.

[0006]

The above-mentioned first to fourth manufacturing methods have the following problems, respectively.

In the first manufacturing method, since the annular sheet core is punched by press working, the punched portion on the inner side of the sheet core is wasted and the yield is poor. In the second manufacturing method, since a sheet core piece smaller than an annular sheet core is punched out by press working, the scrap material of the magnetic steel sheet as a working material is small, so that the yield is improved. However, a step of stacking the sheet core pieces to form a core block and a step of abutting a plurality of core blocks in an annular shape to form a stator core are required.

In the third manufacturing method, the magnetic steel sheet as a processing material is pressed into a strip shape, so that the yield is good, and the core material is simply formed into an annular shape and laminated.
It requires fewer steps than the manufacturing method of. However, a large working force is required to plastically deform the strip-shaped core material into the desired annular shape.

In the fourth manufacturing method, the yield of the magnetic steel sheet is good as in the third manufacturing method, and the number of steps is smaller than that in the second manufacturing method. In addition, a large processing force is required to wind the strip-shaped core material into the desired tubular shape.

Further, in the fifth manufacturing method, since the core material is made by bending the strip-shaped material into an annular shape, the yield of the magnetic steel sheet is better than that of the first to fourth production methods, and moreover, a part of the strip-shaped material is formed. It is easy to bend the band-shaped material into a ring by forming a notch,
Only a small processing force is required. However, U.S. Pat. No. 5,457,350 and Japanese Patent Laid-Open No. 7-795, which are intended only for the ease of bending the band-shaped material.
In the technique disclosed in Japanese Patent No. 51, a gap is generated in the yoke portion of the core sheet due to the above-mentioned notch, and the magnetic circuit performance is deteriorated.

According to the present invention, a magnetic steel sheet as a material for machining has a good yield, can be machined with a small machining force, requires relatively few assembly steps of a rotating electric machine core, and has good magnetic circuit performance. It is an object to provide a method for manufacturing a core.

[0012]

[Means for Solving the Problems] A core material and a method for manufacturing a core of the present invention are: a magnetic steel sheet having teeth formed at predetermined intervals on one side of a strip-shaped magnetic steel sheet, the magnetic steel sheet positioned between adjacent teeth; Using the core material of the rotating electric machine in which the notch of the tapered portion is formed from the one side to the other side and the opening angle of the notch is set according to the number of teeth, the core material is used. Is plastically deformed in a portion where a notch is formed and which is a thin portion, and finally a cylindrical core is finished.

According to the present invention, the yield rate of the magnetic steel sheet as the material for processing is good, the magnetic steel sheet can be processed with a small processing force, and the number of steps for assembling the rotary electric machine core is relatively small. Further, it is possible to avoid the deterioration of the magnetic circuit performance of the rotating electric machine core despite the formation of the notch in the core material.

[0014]

A core material for a rotating electric machine according to claim 1 has teeth formed at predetermined intervals on one side of a strip-shaped magnetic steel plate, and the magnetic steel plate located between adjacent teeth has the magnetic It is characterized in that a notch with a tapered shape is formed from one side to the other side, and the opening angle of the notch is set to (360 / α) when the number of teeth is α. Since it has a chip, it requires only a small amount of processing power. Moreover, in spite of the provision of the notch, in use, the two sides forming the notch come into contact with each other to form a good magnetic circuit.

In the core material of a rotating electric machine according to claim 2, teeth are formed at predetermined intervals on one side of a strip-shaped magnetic steel plate.
In the magnetic steel sheet located between the adjacent teeth, the notch of the tapered end from the one side to the other side, and the other side of the strip-shaped magnetic steel sheet continuously provided at the deep end of the notch. Characterized by forming an expansion formed between and, compared with the case where the expansion is not formed by forming the expansion, only a small processing force is required due to the notch, When the core material is plastically deformed, it is possible to obtain a good core in which the two sides forming the notch are in close contact with each other over the entire length.

According to a third aspect of the present invention, in the core material for a rotary electric machine according to the second aspect, the extension lines of the two sides forming the notch of the tapered portion are formed between the other side of the strip-shaped magnetic steel sheet. And the other side of the strip-shaped magnetic steel plate intersects with each other at the thin portion left, and the two sides forming the notch when the core material is plastically deformed are the entire length. A good core in close contact is obtained.

According to a fourth aspect of the present invention, there is provided a core material for a rotary electric machine according to the first, second and third aspects, wherein a recess is formed on one of two sides forming the notch of the tapered end. ,
On the other hand, a convex portion is formed corresponding to the concave portion, and when the core material is plastically deformed, the two sides forming the cutout are engaged with the concave and convex portion to form the core machine. Strength is improved.

According to a fifth aspect of the present invention, there is provided a core material for a rotary electric machine according to the second, third and fourth aspects, wherein when the number of teeth is α, the opening angle of the notch of the tapered end is (3
60 / α) is set, and when the core material is plastically deformed, a good core can be obtained in which the two sides forming the notch are in close contact.

The yoke material of the rotating electric machine according to claim 6 is
Openings with which the base end portions of the teeth engage are formed at predetermined intervals on one side of the strip-shaped magnetic steel sheet, and a notch of a tapered shape is formed from the back end of the opening toward the other side of the strip-shaped magnetic steel sheet. This is characterized in that when the yoke material and the teeth material are assembled to form the core, there is a notch, so a small processing force is required.

A tooth material for a rotating electric machine according to a seventh aspect of the present invention has a plurality of teeth, each of which has a tip portion connected to each other by a thin portion and an engaging portion which engages with an opening of a yoke is formed at a base end portion. When assembling a yoke material and a teeth material to form a core, a plurality of teeth are
It can be handled as a part and is easy to assemble.

In the method of manufacturing a rotary electric machine core according to the present invention, teeth are formed on one side at a predetermined interval, and a notch having a tapered shape is formed between the adjacent teeth from the one side to the other side. A band-shaped core material having a widening provided continuously at the rear end of the notch is punched by a press, and the band-shaped core material is curved to form one end and the other end of the band-shaped core material into an annular shape, The present invention is characterized in that a tubular rotating electric machine core is formed by stacking the core sheets formed in an annular shape, and the core sheets formed by forming a band-shaped core material in an annular shape are stacked, so that the yield is good and the workability is also good. .

In the method of manufacturing a rotary electric machine core according to a ninth aspect of the present invention, teeth are formed on one side at predetermined intervals, and a notch having a tapered shape is formed between adjacent teeth from the one side toward the other side. A band-shaped core material of the above-mentioned laminated body is obtained by punching out a band-shaped core material having a widening provided continuously at the deep end of the notch with a press, laminating this band-shaped core material, and curving a laminated body of the laminated band-shaped core material. A cylindrical rotating electrical machine core is formed by abutting one end and the other end of a material to form a ring-shaped rotating electrical machine core. Therefore, the yield is good and the workability is also good.

According to a tenth aspect of the present invention, in the method of manufacturing a rotary electric machine core, teeth are formed on one side at predetermined intervals, and a notch having a tapered shape is formed between adjacent teeth from the one side to the other side. A band-shaped core material having a widening continuously provided at the rear end of the notch is punched by a press, the band-shaped core material is curved so that the teeth are inward, and is formed into an arc shape. The yield is good because the formed core sheets are laminated to create a plurality of laminated arc-shaped core divided bodies, and a plurality of laminated arc-shaped core divided bodies are joined to form a tubular rotating electrical machine core. The workability is also good.

According to the eleventh aspect of the present invention, in the method for manufacturing a rotary electric machine core, teeth are formed on one side at predetermined intervals, and notches of tapered ends are formed between adjacent teeth from the one side to the other side. The band-shaped core material having is punched by a press, the band-shaped core materials are laminated, and the laminated body of the laminated band-shaped core materials is curved to create a plurality of arc-shaped laminated arc-shaped core divided bodies, and a plurality of laminated arc-shaped It is characterized in that the core divided body is joined to form a tubular rotating electrical machine core, and the yield is good and the workability is also good.

According to a twelfth aspect of the present invention, in the method of manufacturing a rotary electric machine core, teeth are formed on one side at a predetermined interval, and a notch of a tapered shape is formed between adjacent teeth from the one side to the other side. A band-shaped core material having an expansion continuously provided at the deep end of the notch is punched by a press, and the band-shaped core material is rolled up in a tubular shape while being curved to form a rotary electric machine core, and the yield is good. The workability is also good.

The core material of the rotating electric machine according to claim 13 is:
Teeth are formed on one side of the strip-shaped magnetic steel sheet at a predetermined interval, and on the magnetic steel sheet located between adjacent teeth,
A plurality of notches having tapered ends are formed from one side to the other side, and a widening is continuously provided at the deep end of each notch, and a cylindrical outer shape is provided for rotation. When an electric machine core is produced, a portion sandwiched between the notches serves as a corner portion, resulting in good yield and good workability.

A method of manufacturing a rotating electric machine according to claim 14 is
In Claim 9, winding is applied to the teeth before the laminated body of the strip-shaped core material is formed into an annular shape, and the laminated body of the strip-shaped core material after the winding is completed is formed into an annular shape. More improved.

A method of manufacturing a rotary electric machine according to claim 15 is
The cylindrical rotary electric machine core according to claim 10, wherein the teeth of the laminated circular arc-shaped core divided body are wound, and the laminated circular arc-shaped core divided body after the winding is completed is joined to form a cylindrical rotating electrical machine core,
Workability is further improved.

A method of manufacturing a rotary electric machine according to claim 16 is
In Claim 11, winding is applied to the teeth of the laminated body of the laminated strip-shaped core material, and the laminated body after the completion of winding is curved to form a plurality of arc-shaped laminated arc-shaped core divided bodies. The cylindrical arc-shaped electric machine core is formed by joining the laminated arc-shaped core divided bodies of (1) to further improve the workability.

A method of manufacturing a rotary electric machine according to claim 17 is
A ring-shaped yoke is formed by forming the yoke material of claim 6 in an annular shape so that the opening is on the inner side, and stacking the openings.
A tooth is formed by laminating the tooth material according to claim 7 in an annular shape so that the tooth is on the outside, and the tooth is inserted inside the yoke so that the engaging portion of the tooth engages with the opening of the yoke. It is characterized by forming a tubular rotating electric machine core having a tubular shape, and has good workability when the yoke material and the teeth material are assembled to form the core.

A method of manufacturing a rotary electric machine core according to claim 18 punches the yoke material according to claim 6 with a press, punches out the tooth material according to claim 7 with a press, and stacks the tooth material so that the teeth are placed outside. The tooth laminated body is formed in a ring shape so that the engaging portion of the tooth is wound on the outside of the tooth laminated body so that the opening of the yoke laminated body in which the yoke materials are laminated is sandwiched to form a rotating electric machine core. It is characterized by

A method of manufacturing a rotary electric machine according to claim 19
In Claim 17 or Claim 18, winding is performed on the teeth of the tooth laminated body formed in an annular shape so that the teeth are on the outside, and the engaging portion of the tooth laminated body after the winding is completed is the opening of the yoke laminated body. Is assembled to form a cylindrical rotating electrical machine core, and workability is further improved.

A method of manufacturing a rotary electric machine according to claim 20 includes:
In Claim 8, Claim 9, Claim 10, and Claim 11, when manufacturing a cylindrical rotary electric machine core by laminating core materials, notches with the same opening angle but different inclination angles are formed as core materials. It is characterized by forming a plurality of types of core material, and alternately stacking the plurality of types of core material, because the notch position does not match in the upper layer and the lower layer,
The deterioration of the magnetic circuit performance due to the provision of the notch can be improved.

A method of manufacturing a rotary electric machine according to claim 21 is
13. The belt-shaped core material according to claim 12, wherein the belt-shaped core material is formed by bending the belt-shaped core material while curving it up to manufacture a tubular rotary electric machine core, wherein the inclination angle of the notch is different for each circumference of the finishing dimension. The strip-shaped core material is curved and rolled up to form a tubular shape. Since the notch positions do not match between the upper layer and the lower layer, deterioration of the magnetic circuit performance due to the provision of the notch can be improved.

A method of manufacturing a rotary electric machine according to claim 22
In Claims 17 and 18, when manufacturing a rotary electric machine core by inserting the teeth in which the teeth material is laminated inside the cylindrical yoke in which the yoke materials are laminated, the opening angle is the same as the core material and the inclination angle is It is characterized in that a plurality of types of core materials with different notches are formed, and the plurality of types of core materials are alternately laminated, and the notch positions of the yoke material do not match in the upper layer and the lower layer. The deterioration of the magnetic circuit performance due to the provision of can be improved.

A method of manufacturing a rotary electric machine according to claim 23,
Claim 1, Claim 2, Claim 3, Claim 4, Claim 5,
When manufacturing the core material according to claim 13, the first core material and the second core material are inside the teeth, and the teeth of the second core material are between the adjacent teeth of the first core material. Is characterized in that it is positioned so that it is positioned and punched by a press, and the yield can be further improved.

A method of manufacturing a rotary electric machine according to claim 24,
When manufacturing the yoke material according to claim 6, the first yoke material and the second yoke material are formed so that the opening with which the base end portion of the tooth engages is inside, and the first yoke material is adjacent to the first yoke material. It is characterized in that the convex portions formed between the openings are plated so as to be located in the openings of the second core material and punched by a press, so that the yield can be further improved.

Each embodiment of the present invention will be described below. [First Embodiment] FIGS. 1 to 3 show [First Embodiment]. This embodiment shows a manufacturing method of a stator core having 24 slots and a core material used for the manufacturing method.

As shown in FIG. 1A and FIG. 2, the core material 1 is in the form of a band in which 24 segments 2 are connected in series by a thin portion 3, and each segment 2 is composed of a tooth 4 and a yoke 5. Has been done.

The magnetic steel sheet located in the yoke 5 between the adjacent teeth 4 is provided with a notch 6 having a tapered shape from one side A to the other side B of the strip-shaped core material 1. . An expansion 7 is continuously provided at the rear end of each notch 6,
The thin portion 3 is formed between the expansion 7 and the other side B of the strip-shaped core material 1.

The opening angle β of the notch 6 is β = (360 / α) = (360/24) = when the number of teeth is α.
It is set to 15 °. The extension lines of the two sides 6a and 6b forming the cutout 6 intersect near the thin portion 3, more specifically, at a point P near the expansion 7 of the thin portion 3.

The core material 1 is formed by pressing a strip-shaped magnetic steel plate as shown in FIG. Specifically, the teeth 4 of the first core material 1a and the second core material 1b are placed inside, and the teeth 4 of the second core material 1b are provided between the adjacent teeth 4 of the first core material 1a.
It is punched with a press in the state that it is positioned so that

A large number of core materials 1 thus formed by pressing are curved so that the teeth 4 are located inside, as shown in FIG. 1B, and the thin portion 3 is plastically deformed. The core sheet 8 is formed by forming the core material 1 into an annular shape in which one end 1c and the other end 1d of the core material 1 are in contact with each other.

Next, the core sheets 8 are laminated as shown in FIG. 1 (c) to form a cylindrical shape as shown in FIG. 1 (d), and the groove 9 formed in a part of the outer periphery is welded. Then, the stator core 10 is completed. After that, the stator core 10 is wound.

As described above, when the core material 1 having the notch 6 formed therein is formed into an annular shape, only a slight processing force for plastically deforming the thin wall portion 3 of each segment 2 is required. Workability is good because they are laminated. Further, in the state where the core material 1 is formed into an annular shape, the notch 6
Since the two sides 6a and 6b forming the abutting contact each other and the yoke divided surfaces are in close contact with each other, the magnetic performance is also good.

Further, since the notch 6 is continuously provided with the expansion 7, the core material 1 is formed into an annular shape so that the two sides 6 are formed.
The a and 6b are surely brought into contact with each other over the entire width so that the yoke division surfaces are in close contact with each other and the notch 6 is provided to reduce the deterioration of the magnetic characteristics. Notch 6 if expansion 7 is not provided
The adhesion between the two sides 6a and 6b is slightly reduced near the innermost end of the.

Further, as shown in FIG. 3, since it is plate-shaped, it is possible to change from the band-shaped processing material to the first and second core materials 1.
A small amount of waste material remains after the removal of a and 1b, and the magnetic steel sheet has a high effective utilization rate and a good yield.

[Second Embodiment] FIG. 4 shows a second embodiment. In the first embodiment, the core material 1
Was plastically deformed in an annular shape to form a core sheet 8 which was laminated to form a stator core 10. In this [second embodiment], the strip-shaped core material 1 shown in FIG. As shown in FIG. 4 (b), the laminated body is laminated in that state, and the laminated body is plastically deformed into an annular shape with the teeth 4 inside as shown in FIG. 4 (c). The tubular stator core 10 is completed by welding the portion of the groove 9 formed in a part thereof.

The process of forming the laminated body of the band-shaped core material into an annular shape requires only a comparatively small processing force because the thin portion 3 of each core material 1 is plastically deformed. Regarding the timing of winding, the manufacturing method in which the cylindrical stator core 10 is finished and then winding is performed as in [First Embodiment], and the winding is performed as shown in FIG. 4B. By winding the tooth 4 of the previous laminated body and then plastically deforming it annularly as shown in FIG. 4 (c), winding is performed as compared with the case where the cylindrical stator core 10 is finished and then wound. Wire work becomes easy.

[Third Embodiment] FIG. 5 shows a third embodiment. In the first embodiment, the core material 1
Was plastically deformed in an annular shape to form a core sheet 8, and the core sheet 8 was laminated to form a stator core 10. In this [third embodiment], when manufacturing a stator core having 24 slots, eight teeth 4 are formed. As shown in FIG. 5 (a), the core material 1 having the above is punched by press working, and the strip-shaped core material 1 is curved so that the teeth 4 are inward as shown in FIG. 5 (b). To form an arc.

The arc-shaped core sheets 8 are laminated to form three laminated arc-shaped core divided bodies 10a, 10b and 10c as shown in FIG. 5 (c). Next, the laminated arc-shaped core divided bodies 10a, 10b, and 10c are butted into a ring shape as shown in FIG. 5D, and the laminated arc-shaped core divided bodies 10a and laminated arc-shaped as shown in FIG. Places in contact with the core divided body 10b, places in contact with the laminated arc-shaped core divided body 10b and laminated arc-shaped core divided body 10c, laminated arc-shaped core divided bodies 10c and laminated arc-shaped core divided body 10a The cylindrical stator core 10 is completed by welding the portion of the groove 9a formed at the contacting point with.

As described above, when the core material 1 having the notches 6 formed therein is formed into an annular shape, only a small processing force for plastically deforming the thin wall portion 3 of each segment 2 is required. Workability is good because they are laminated.

Regarding the winding timing, as in the first embodiment, the manufacturing method in which the cylindrical stator core 10 is finished and then the winding is performed, and as shown in FIG. 5 (c). By winding the teeth 4 in the state of the laminated arc-shaped core divided bodies 10a to 10c and then abutting and joining the laminated arc-shaped core divided bodies 10a to 10c as shown in FIG. The winding work is easier than the case where the winding is performed after the stator core 10 having the shape is finished.

[Fourth Embodiment] FIG. 6 shows a fourth embodiment. In the third embodiment, the core material 1
Was plastically deformed in an annular shape to form a core sheet 8, which was laminated to form laminated arc-shaped core divided bodies 10a to 10c. As shown in FIG. 6B, the strip-shaped core material 1 was laminated. To produce the laminated bodies 8a, 8b, 8c, and
8c is plastically deformed to form laminated arcuate core divided bodies 10a, 1
The same effect can be expected even if 0b and 10c are created and the following completes the cylindrical stator core 10 as shown in FIGS. 6D and 6E in the same manner as in [Third Embodiment]. .

Regarding the timing of winding, as in the case of [Third Embodiment], a manufacturing method in which the winding is performed after the cylindrical stator core 10 is finished, and the lamination is performed as shown in FIG. 6 (c). In addition to the case where the teeth 4 are wound in the state of the arcuate core divided bodies 10a to 10c and then the laminated arcuate core divided bodies 10a to 10c are butted and joined to each other as shown in FIG. 6 (b), the cylindrical stator core 10 can also be obtained by winding the teeth 4 of the laminated bodies 8a to 8c before being bent and then plastically deforming them into the laminated arc-shaped core divided bodies 10a to 10c. The work of winding is easier than the case of applying winding after finishing.

[Fifth Embodiment] FIG. 7B to FIG.
(D) shows [fifth embodiment]. In the core material 1 of each of the above-described embodiments, the two sides 6a and 6b of the notch 6 are formed by straight lines as shown in FIG.
Forming a notch 6 as shown in (b) to (d) of 2
A state in which a concave portion 11a is formed on one of the sides and a convex portion 11b is formed on the other side so as to correspond to the concave portion 11a, and the core material 1 or the laminated bodies 8a to 8c are plastically deformed in an annular or arc shape. Then, the convex portion 11b is engaged with the concave portion 11a, the notch 6 is brought into contact with the yoke split surface, and the yoke split surface is brought into close contact with the concave portion 11a, whereby improvement in mechanical strength of the stator core can be expected.

[Sixth Embodiment] FIGS. 8A and 8B.
Indicates [Sixth Embodiment]. This shows a method for manufacturing a stator core having 6 slots and a core material used for the stator core, which is a modification of [First Embodiment] to [Fourth Embodiment].

The core material 1 is, as shown in FIG.
In the magnetic steel sheet located in the yoke 5 between the teeth 4 adjacent to each segment 2 in a strip shape in which six segments 2 are connected in series by the thin portion 3, a notch 6 and an expansion 7 are formed. There is.

The opening angle β of the notch 6 in this case is β = (360 / α) = (36 when the number of teeth is α.
0/6) = 60 ° is set. The extension lines of the two sides 6a and 6b forming the cutout 6 are [first embodiment].
In the same manner as above, the thin portion 3 intersects at a point P near the expansion 7. The core material 1 is formed by pressing a strip-shaped magnetic steel plate as shown in FIG.

A large number of core materials 1 thus formed by press working are shown in FIG. 1 [first embodiment].
Similarly, the teeth 4 are curved so as to be inward, and the thin portion 3 is plastically deformed, so that the one end 1c and the other end 1d of the core material 1 are formed.
8 is contacted with each other to form an annular shape as shown in FIG. 8B to form a core sheet 8, and the core sheets 8 are laminated to form a tubular stator core 10, which is shown in FIG. Second
Any of the manufacturing methods of stacking a large number of core materials 1 formed by press working, bending them so that the teeth 4 are on the inside, and plastically deforming them to form a tubular stator core 10 in the same manner as Alternatively, the stator core 10 is manufactured in the same manner as the core material 1 shown in FIG. 5 [third embodiment] or FIG. 6 [fourth embodiment].

When the stator core 10 is manufactured in the same manner as in [Third Embodiment] shown in FIG. 5, the core material 1 shorter than 6 slots, for example, 3 slots is punched by press working. The core material 1 for 3 slots is plastically deformed into an arc shape to form a core sheet 8, and the core sheets 8 are laminated to form two laminated arc-shaped core divided bodies 10a and 10b. The arc-shaped core divided bodies 10a and 10b are butted into a tubular shape and welded to form a stator core 10.

When a stator core is manufactured in the same manner as in [Fourth Embodiment] shown in FIG. 6, a core material 1 shorter than 6 slots, for example, 3 slots, is punched out by press working. The core material 1 for 3 slots is laminated to form two laminated bodies 8a and 8b, and the laminated bodies 8a and 8b are plastically deformed in an arc shape to form laminated arc-shaped core divided bodies 10a and 10b. The laminated arc-shaped core divided bodies 10a and 10b are butted to form a tubular shape and welded to form the stator core 10.

The winding timing is also the same as in [First Embodiment] to [Fourth Embodiment]. In FIG. 8, the two sides 6a and 6b of the notch 6 are composed of straight lines,
As shown in FIGS. 7B to 7D, a concave portion 11a is formed on one of the two sides forming the notch 6, and a convex portion 11b is formed on the other side corresponding to the concave portion 11a. It is also possible to improve the mechanical strength of the stator core.

[Seventh Embodiment] FIGS. 9A and 9B.
Indicates [Seventh Embodiment]. This shows a method of manufacturing a stator core of a commutator motor and a core material used for the method.

FIG. 9 (a) shows a plate pattern when the core material 1 is prepared by pressing a strip-shaped magnetic steel plate. Each core material 1 has teeth 4 formed at one side on one side of a strip-shaped magnetic steel sheet, and the magnetic steel sheet positioned between the adjacent teeth 4 has a tapered shape from the one side to the other side. A plurality of notches 6 are formed.

The opening angle β of the notch 6 in this case is 45
It is set to °. Two sides 6a forming the notch 6,
The extension line of 6b is the thin portion 3 as in the first embodiment.
It intersects at a point P near the expansion 7.

A large number of core materials 1 thus formed by pressing are shown in FIG. 1 [first embodiment].
Similarly, the thin portion 3 is plastically deformed so that the teeth 4 are on the inside, and one end 1c and the other end 1d of the core material 1 are brought into contact with each other to form an annular shape as shown in FIG. 9 (b). A large number of core materials 1 produced by press working in the same manner as in [Second Embodiment] shown in FIG. 4, in which a sheet 8 is produced and the core sheets 8 are laminated to form a tubular stator core 10.
After stacking, thin part 3 so that teeth 4 are on the inside
Of a tubular stator core by plastically deforming, or the core material 1 shown in FIG. 5 [third embodiment] or FIG. 6 [fourth embodiment]. Similarly, a stator core is manufactured.

The winding timing is also the same as in [First Embodiment] to [Fourth Embodiment]. In FIG. 9, the two sides 6a and 6b of the notch 6 are composed of straight lines,
As shown in FIGS. 7B to 7D, a concave portion 11a is formed on one of the two sides forming the notch 6, and a convex portion 11b is formed on the other side corresponding to the concave portion 11a. It is also possible to improve the mechanical strength of the stator core.

[Eighth Embodiment] FIG. 10A to FIG.
(C) shows [Eighth Embodiment]. This embodiment shows a manufacturing method of a stator core having 24 slots and a core material used for the manufacturing method.

FIG. 10 (a) shows a plate pattern when the yoke material 12 and the teeth material 13 are produced by pressing a strip-shaped magnetic steel plate. The yoke material 12 has openings 14 formed at predetermined intervals on one side of the strip-shaped magnetic steel plate, at which the engaging portions 4a on the base end side of the teeth 4 engage.
A notch 6 having a tapered shape is formed from the innermost end of the tape toward the other side of the strip-shaped magnetic steel sheet. A widening 7 is formed at the rear end of the notch 6.

The opening angle β of the notch 6 in this case is β = (360 / α) = (36 where α is the number of teeth.
0/24) = 15 ° is set. The extension lines of the two sides 6a and 6b forming the cutout 6 are [first embodiment].
In the same manner as above, the thin portion 3 intersects at a point P near the expansion 7.

In the many yoke blanks 12 thus formed by press working, the thin portion 3 is plastically deformed so that the opening 14 is on the inner side as in the case of the [first embodiment] shown in FIG. Then, an annular yoke sheet 12a as shown in FIG. 10B is prepared, and the yoke sheets 12a are laminated to form a cylindrical laminated yoke body 12b.

The tooth material 13 is pressed so that the tips of the teeth 4 are connected by the thin portion 4b. As shown in (c) of FIG. 10, the tooth material 13 is plastically deformed in an annular shape with the base end portion of the tooth being an outer side to form a tooth sheet 13 a.
3a is laminated to form a laminated tooth body 13b. The laminated tooth body 13b is inserted inside the laminated yoke body 13b to form the stator core 10. FIG. 10D shows a state where the laminated tooth body 13b is being inserted inside the laminated yoke body 12b. When the laminated teeth body 13b is inserted inside the laminated yoke body 12b, the teeth 4 of the laminated teeth body 13b are wound.

In the above manufacturing method, FIG.
The laminated tooth body 13b to the laminated yoke body 12 as shown in FIG.
Although it has been described that the stator core is manufactured by inserting the stator core inside the b, the stator core can be manufactured as shown in FIG. 11.

FIG. 11A shows a state in which the yoke materials 12 are laminated in the state as they are, and the thin portion 3 is sequentially plastically deformed and wound around the outer side of the laminated tooth body 13b whose winding is completed. ing.

As a result, the engaging portion 4a of the tooth 4 of the laminated tooth body 13b is connected to the opening 1 of the yoke material 12.
4 is engaged and sandwiched with the magnetic circuit to form a magnetic circuit.
The stator core 10 has a tubular shape as shown in FIG.

[Ninth Embodiment] FIG. 12 shows [Ninth Embodiment]. In the stator core 10 of each of the above embodiments, the laminated core sheets have the same shape,
The notch 6 is formed in the same place in the upper layer and the lower layer.
In this [Ninth Embodiment], two types of core materials 1e, 1f having different inclinations of the notches 6 are prepared as shown in FIGS. 12 (a) and 12 (b), and the core materials 1e, 1f are prepared.
By alternately stacking the above to form the stator core 10, the position of the notch 6c in the upper layer and the notch 6d in the lower layer are formed.
The position is shifted as shown in FIG. 12 (c).

With this structure, it is possible to suppress an increase in magnetic circuit resistance due to the formation of the notch. In this embodiment, two kinds of core materials are alternately laminated, but it can also be realized by alternately laminating three or more kinds of core materials having notches with the same opening angle but different inclination angles.

Similarly, as the yoke material 12 of [Eighth Embodiment] shown in FIG. 10 and FIG. 11, two kinds of core materials having different inclinations of the notches 6 are prepared, and the core materials are alternated. By stacking the two layers on top of each other and shifting the positions of the cutouts in the upper layer and the cutouts in the lower layer, an increase in the magnetic circuit resistance can be similarly reduced.

Even when the position of the notch in the upper layer and the position of the notch in the lower layer are deviated from each other as in this [Ninth Embodiment], [Fifth Embodiment] shown in FIG. As described above, a recess 11a is formed on one of the two sides forming each notch 6 and a projection 11b is formed on the other side corresponding to the recess 11a to improve the mechanical strength of the stator core. It can also be planned.

[Tenth Embodiment] FIG. 13 shows a tenth embodiment.
Embodiment of] is shown. In this embodiment, as shown in FIG. 1, the core sheet 8 formed in an annular shape is laminated to form a tubular stator core 10 as shown in FIG.
Instead of stacking the core material 1 and then bending it in an annular shape to form the cylindrical stator core 10 as shown in [Second Embodiment], a long magnetic steel plate is continuously pressed. First embodiment], a continuous long core material 1'having the same shape as that of the first embodiment is formed, and the belt-shaped core material 1'is bent to plastically deform the thin portion 3 and rolled up in a tubular shape to form the stator core 10. Is forming.

Even in the case where the stator core 10 is manufactured by winding the material in a tubular shape in this manner, the [first embodiment].
Since the notch 6 is formed in the strip-shaped core material 1 ′ similarly to the above, only a small processing force for plastically deforming the thin portion 3 is required and the workability is good.

Further, when manufacturing the tubular stator core 10 by curling the strip-shaped core material 1 ′ while curving the strip-shaped core material 1 ′, the strip-shaped core material 1 ′ having different notch angles for each pitch according to the diameter of the finished dimension is used. 1 is formed, and the strip-shaped core material is rolled up to form a tubular shape.
The position of the notch in the upper layer and the position of the notch in the lower layer can be displaced in the same manner as in [Ninth Embodiment] shown in FIG. 2, and an increase in the magnetic circuit resistance can be suppressed.

[0084]

As described above, according to the present invention, teeth are formed on one side of a strip-shaped magnetic steel sheet at predetermined intervals, and the magnetic steel sheet located between the adjacent teeth has the one side to the other side. Using a core material that forms a notch with a taper toward the edge and sets the opening angle of the notch to (360 / α) when the number of teeth is α, various manufacturing methods In the end, since a tubular rotating electrical machine core is manufactured by annularly molding so that there is no gap in the notch, when manufacturing using a core material that does not have the notch, Compared to this, it requires less processing power and has good productivity. Moreover, in spite of the provision of the notch, in use, the two sides forming the notch come into contact with each other to form a good magnetic circuit.

In addition to the above-mentioned notch, in the case of a core material which is continuously provided at the inner end of the notch and has an expansion formed between the other side of the strip-shaped magnetic steel sheet, the core material is Since the two sides forming the cutout by forming the ring shape can surely contact each other over the entire width to bring the yoke division surface into close contact, deterioration of magnetic characteristics due to the provision of the cutout can be reduced. .

Further, when manufacturing the core material having the above-mentioned notch, the first core material and the second core material are made to have teeth inside, and between the adjacent teeth of the first core material. By plate-forming the teeth of the second core material so that they are positioned and punching with a press, the effective utilization rate of the magnetic steel sheet is high and the yield is good.

Also, when the stator core is formed of the yoke material and the teeth material, the same effect can be expected by performing the same operation.

[Brief description of drawings]

FIG. 1 is a process diagram of a manufacturing method showing [first embodiment].

FIG. 2 is an enlarged plan view of a main part of the core material according to the same embodiment.

FIG. 3 is a plan view showing plate setting in the press working of the same embodiment.

FIG. 4 is a process diagram of the manufacturing method showing the second embodiment.

FIG. 5 is a process drawing of the manufacturing method showing the [third embodiment].

FIG. 6 is a process drawing of a manufacturing method showing [fourth embodiment].

FIG. 7 is a plan view of a cutout portion of a core material showing a fifth embodiment.

FIG. 8 is a process drawing of the manufacturing method showing the sixth embodiment.

FIG. 9 is a process drawing of the manufacturing method showing the [Seventh Embodiment].

FIG. 10 is a process drawing of the manufacturing method showing [Eighth Embodiment].

FIG. 11 is a process drawing of another manufacturing method according to the eighth embodiment.

FIG. 12 is a plan view of a core material having different notch angles, showing a ninth embodiment.

FIG. 13 is a perspective view of a core material in a rolled-up state, showing a tenth embodiment.

[Explanation of symbols]

 A One side of the strip-shaped core material 1 B Other side of the strip-shaped core material 1 β Opening angle of the cutout α Number of teeth 1 Core material 1a First core material 1b Second core material 1c One end of core material 1d The other end of the core material 1e, 1f Core material 1'Continuous long core material 2 24 segments 3 Thin parts 4 Teeth 4a Teeth 4 engaging parts 4b Teeth 4 thin parts 5 Yoke 6 Recesses Notch 6c Upper layer notch 6d Lower layer notch 7 Expansion 8 Core sheets 8a, 8b, 8c Laminated body of band-shaped core material 9 Grooves 10 Stator cores 10a, 10b, 10c Laminated arc-shaped core divided body 11a Notch 6 Recessed portion 11b Convex portion of cutout 12 Yoke material 12a Yoke sheet 12b Laminated yoke body 13 Teeth material 13a Teeth sheet 13b Laminated tea Scan body

Claims (24)

[Claims] 1. Teeth are formed on one side of a strip-shaped magnetic steel sheet at predetermined intervals, and the magnetic steel sheet located between adjacent teeth has a notch with a tapered shape from the one side toward the other side. And the opening angle of the notch is set to (360 / α) when the number of teeth is α. 2. Teeth are formed on one side of the strip-shaped magnetic steel sheet at predetermined intervals, and the magnetic steel sheet located between adjacent teeth has a tapered cut from the one side to the other side. A core material for a rotating electric machine, which has a notch and an expansion which is continuously provided at the deep end of the notch. 3. An extension line of two sides forming a notch in the tapered portion is formed between the expansion formed between the other side of the strip-shaped magnetic steel sheet and the other side of the strip-shaped magnetic steel sheet. The core material for a rotating electric machine according to claim 2, wherein the core material intersects at a thin portion left behind. 4. The method according to claim 1, wherein a recess is formed on one of the two sides forming the notch of the tapered end, and a projection is formed on the other side corresponding to the recess. The core material of the rotating electric machine according to claim 3. 5. The core of a rotary electric machine according to claim 2, wherein the opening angle of the notch of the tapered portion is set to (360 / α) when the number of teeth is α. Material. 6. An opening with which a base end portion of a tooth engages is formed at a predetermined interval on one side of a strip-shaped magnetic steel sheet, and is tapered from the inner end of the opening toward the other side of the strip-shaped magnetic steel sheet. The yoke material of the rotating electric machine with the notch formed. 7. A tooth material for a rotary electric machine having a plurality of teeth, each of which has a thin wall portion connecting the front end portions to each other, and an engaging portion which engages with an opening of the yoke is formed at a base end portion. 8. Teeth are formed on one side at predetermined intervals,
A band-shaped core material having a notch with a tapered shape from one side to the other side between adjacent teeth and an expansion continuously provided at the deep end of the notch is punched with a press, and the band-shaped core A method for manufacturing a rotary electric machine core, comprising bending a material to form a ring-shaped core material by abutting one end and the other end of the strip-shaped core material to form an annular shape, and stacking the annular core sheets to form a tubular rotary electric machine core. 9. Teeth are formed on one side at predetermined intervals,
A band-shaped core material having a notch with a tapered shape from one side to the other side between adjacent teeth and an expansion continuously provided at the deep end of the notch is punched with a press, and the band-shaped core A rotary electric machine in which materials are laminated, and a laminated body of laminated belt-shaped core materials is curved, and one end and the other end of the belt-shaped core material of the laminated body are abutted to form an annular shape to form a tubular rotating electric machine core. Core manufacturing method. 10. Teeth are formed on one side at predetermined intervals, and are formed continuously between adjacent teeth at the notch of the tapered end and the deep end of the notch from the one side toward the other side. A strip-shaped core material having an expansion is punched by a press, the strip-shaped core material is curved and formed into an arc shape, and the arc-shaped core sheets are stacked to form a plurality of laminated arc-shaped core divided bodies. A method for manufacturing a rotary electric machine core, comprising forming a cylindrical rotary electric machine core by joining a plurality of laminated arc-shaped core divided bodies. 11. Teeth are formed on one side at a predetermined interval, and are formed continuously between adjacent notches from the one side to the other side in the notch of the tapered end and the deep end of the notch. A band-shaped core material having an expansion is punched by a press, the band-shaped core materials are laminated, and a laminated body of the laminated band-shaped core materials is curved to form a plurality of arc-shaped laminated arc-shaped core divided bodies. A method for manufacturing a rotary electric machine core, comprising forming a cylindrical rotary electric machine core by joining the laminated arc-shaped core divided bodies of. 12. Teeth are formed on one side at a predetermined interval, and the teeth are formed continuously from adjacent ones to the other side from the one side toward the other side at the notch of the tapered end. A method of manufacturing a rotary electric machine core, comprising punching a band-shaped core material having a spread and pressing it into a tubular shape while curving the band-shaped core material while curving the band-shaped core material. 13. Teeth are formed at predetermined intervals on one side of a strip-shaped magnetic steel sheet, and the magnetic steel sheet located between adjacent teeth has a notch with a tapered shape from the one side to the other side. A core material for a rotating electric machine in which a plurality of holes are formed, and an expansion is continuously provided at the deep end of each notch. 14. The rotating electric machine core according to claim 9, wherein the teeth are wound before forming the laminated body of the strip-shaped core material into an annular shape, and the laminated body of the strip-shaped core material after completion of winding is formed into an annular shape. Manufacturing method. 15. The rotating electric machine according to claim 10, wherein a winding is applied to the teeth of the laminated arc-shaped core divided body, and the laminated arc-shaped core divided bodies after the winding is completed are joined to each other to form a tubular rotating electric machine core. Core manufacturing method. 16. A plurality of arc-shaped laminated arc-shaped core divided bodies are formed by winding the teeth of the laminated body of laminated band-shaped core materials and curving the laminated body after the winding is completed. 12. The method for manufacturing a rotary electric machine core according to claim 11, wherein the laminated circular arc-shaped core divided body is joined to form a cylindrical rotary electric machine core. 17. An opening with which a base end portion of a tooth engages is formed at a predetermined interval on one side of a strip-shaped magnetic steel sheet, and is tapered from the inner end of the opening toward the other side of the strip-shaped magnetic steel sheet. 7. The yoke material according to claim 6, wherein a notch and a widening continuous with the deep end of the notch are formed by punching with a press, the leading end portions are connected with a thin portion, and the base end portion has a yoke. The tooth material according to claim 7, which has a plurality of teeth formed with engaging portions that engage with the openings of the yoke material, is formed into a ring shape so that the openings of the yoke material are on the inside, and is laminated. To form a tubular yoke, and to form teeth by stacking the teeth materials so that the teeth are on the outside so that the teeth engaging portion engages with the opening of the yoke inside the yoke. Insert teeth and insert the cylindrical rotating electrical machine. A method of manufacturing a rotating electrical machine core for forming a. 18. An opening with which a base end portion of a tooth engages is formed at a predetermined interval on one side of a strip-shaped magnetic steel sheet, and is tapered from the rear end of the opening toward the other side of the strip-shaped magnetic steel sheet. 7. The yoke material according to claim 6, wherein the notch is formed, is punched out by a press, a plurality of tip portions are connected to each other by a thin portion, and a plurality of engaging portions which engage with the opening of the yoke are formed at the base end portion. The tooth material according to claim 7, which has teeth, is punched by a press to laminate the tooth material to form an annular tooth laminated body so that the tooth is on the outer side, and the tooth engaging portion is provided on the outer side of the tooth laminated body. A method of manufacturing a rotary electric machine core, comprising winding the above-mentioned yoke material so as to be sandwiched by openings of a yoke laminated body to form a rotary electric machine core. 19. A winding is applied to the teeth of the teeth laminated body formed in an annular shape so that the teeth are on the outside, and the engaging portion of the teeth laminated body after the winding is engaged with the opening of the yoke laminated body. 19. The method for manufacturing a rotary electric machine core according to claim 17, wherein the tubular rotary electric machine core is assembled to form a cylindrical rotary electric machine core. 20. When manufacturing a tubular electric rotating machine core by laminating core materials, a plurality of types of core materials having notches with the same opening angle but different inclination angles are formed as core materials, and The method for manufacturing a rotary electric machine core according to claim 8, claim 9, claim 10, or claim 11, wherein a plurality of types of core materials are alternately laminated. 21. When manufacturing a tubular rotating electrical machine core by winding a strip-shaped core material while curving it, a strip-shaped core material having different cutout inclination angles is formed for each circumference of the finishing dimension. The method for manufacturing a rotating electrical machine core according to claim 12, wherein the belt-shaped core material is wound into a tubular shape while being rolled up. 22. When manufacturing a rotating electrical machine core by inserting teeth having laminated teeth material inside a cylindrical yoke having laminated yoke materials, notches having the same opening angle but different inclination angles are used as core materials. The method for manufacturing a rotary electric machine core according to claim 17 or 18, wherein a plurality of types of formed core materials are formed, and the plurality of types of core materials are alternately laminated. 23. Teeth are formed on one side of the magnetic steel sheet at predetermined intervals, and a notch having a tapered shape is formed in the magnetic steel sheet located between adjacent teeth from the one side toward the other side. When manufacturing the core material according to claim 1, claim 2, claim 3, claim 4, claim 5, claim 13, the first core material and the second core material are made to have teeth inside. At the same time, a method of manufacturing a core material in which the teeth of the second core material are positioned between adjacent teeth of the first core material and punched by a press. 24. One side of the strip-shaped magnetic steel plate is formed with openings at predetermined intervals to which the base end portions of the teeth are engaged, and is tapered from the rear end of the opening toward the other side of the strip-shaped magnetic steel plate. When manufacturing the yoke material according to claim 6 in which the notch is formed, the first yoke material and the second yoke material are formed so that the opening with which the base end portion of the tooth engages is inside, and A method of manufacturing a yoke material, wherein a convex portion formed between the openings adjacent to each other of the yoke material is plated so as to be located in the opening of the second core material and punched by a press.