JP2007166767A - Split skewed and stacked core and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make the easy winding work or the insertion work of formed coils or permanent magnets or the like by skewing a yoke of a core for an rotating electric machine and magnetic pole teeth to improve electromagnetic characteristics between a stator and a rotor and by splitting the yoke and the magnetic pole teeth by the unit of the magnetic pole tooth. <P>SOLUTION: The split skewed and stacked core is constituted of the yoke 10Y of a partially circular shape having dimensions corresponding to a shape obtained by dividing the cylindrical yoke of the stacked core of total stacked core element pieces 10<SB>-1</SB>, 10<SB>-2</SB>, to 10<SB>-n</SB>by the number of magnetic pole teeth, and a magnetic pole tooth 10T that protrudes from the side 10U of its front side of each yoke 10Y and that protrudes at an angle that differs by a unit angle obtained by dividing the skew angle by the number stacked pieces. These total stacked core element pieces 10<SB>-1</SB>, 10<SB>-2</SB>, to 10<SB>-n</SB>are stacked one by one in the order of protruding angles of the magnetic pole teeth 10T that increase by the unit angle from a skew starting point to an end point. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a split skew laminated core for a rotating electrical machine for a stator and / or rotor of a rotating electrical machine and a method for manufacturing the same. The term “skew laminated core” in this case is mainly formed so that the stator teeth or rotor magnetic teeth (teeth) and winding grooves (slots) are skewed (tilted) as appropriate with respect to the central axis of the cylinder. This is a structure effective for eliminating or reducing the cogging torque that causes insufficient starting torque and torque pulsation.

  A rotating electrical machine such as an electric motor or a generator exhibits an expected effect based on an electromagnetic action between a stator and a rotor. A typical internal motor is a device that obtains power from a rotating shaft by transmitting a magnetic action from the stator to the rotor based on an electrical input supplied to the stator and / or rotor, and rotating the rotor. is there. A generator is a device that electromagnetically links a stator and a rotor and converts external power supplied from the rotor into an electrical output.

  Thus, in order to obtain the desired effect in the rotating electrical machine, it is indispensable that the transfer of magnetic flux between the stator and the rotor is performed smoothly and in an ideal form. If the magnetic flux is not exchanged ideally, inconveniences such as difficulty in starting, uneven torque, promotion of magnetostriction, generation of abnormal noise, and reduction in efficiency may be caused.

  In order to avoid such an uninvited situation, measures to incline (skew) magnetic pole teeth (teeth), windings, or grooves (slots) for embedding permanent magnets at a predetermined angle from the center of the rotating machine shaft are widely adopted. ing.

  When skewing magnetic pole teeth, slots, etc., which are laminates of electromagnetic steel sheets, silicon steel sheets, etc., it is necessary to perform punching by shifting the core pieces of the laminated core by a desired width in order to form skew magnetic pole teeth or skew slots. . Such skew magnetic pole teeth or skew slots tend to be much more difficult to perform winding work, die winding coil or permanent magnet piece insertion work than ordinary parallel magnetic pole teeth or parallel grooves. This is an obstacle to process automation. Therefore, there are prior arts including proposals for efficiently using skew pole teeth and skew slots.

  Patent Document 1 aims to provide a configuration with excellent productivity while reducing uneven starting torque and cogging of a magnet generator, an electric motor, and the like. For this reason, when the skew of the gap with the stator is formed, a slot for inserting a magnet radially is provided in the rotor core so that when the number of magnetic pole teeth is n, it follows the side of the spacer made of an n-gonal nonmagnetic material. In the case where the opposite face of the rotor core is formed so that a long rectangular magnet can be inserted without causing a gap with the slot, and when the skew width W is changed, it is within ½ of the length L of the spacer side. Discloses that a skew width W (0 <W ≦ 1 / 2L) can be formed.

  The invention of this Patent Document 1 is mainly intended to obtain a skew groove structure that can be easily inserted even by a long rectangular magnet. When the number of magnetic poles is n, the laminated iron core is divided into n equal parts in the axial direction. It becomes the structure which makes it easy to insert a rectangular parallelepiped magnet.

  According to Patent Document 2, the winding structure and the structure of the stator and rotor of an AC generator, an electric motor, and the like, and the structure thereof are simplified, and the winding structure is simplified by the core structure, material and structure, and the start-up characteristics are greatly improved. The purpose is to solve the technical problems to improve the efficiency at the time of output, to realize the structure of iron cores and magnets that can cope with a variety of small volume production, to realize a high heat-resistant electric machine and to reduce the size and weight. The invention of this Patent Document 2 is divided into the number of magnetic poles in the direction along the axis, and further subdivided in the direction perpendicular to the axis, thereby facilitating insertion of a long cuboid permanent magnet and adjusting the skew angle. As possible, it has a configuration that can handle a variety of small-volume production.

JP 2000-354341 A JP 2003-153472 A

  The present invention aims to improve the electromagnetic characteristics between the stator and the rotor by skewing the yoke portion and the magnetic pole teeth of the core for a rotating electrical machine by a desired angle, thereby enabling reduction of cogging, and the yoke portion and It is an object of the present invention to provide a split skew laminated core for a rotating electrical machine that facilitates winding work, insertion of a coiled coil or permanent magnet piece by dividing the magnetic pole teeth into units of magnetic pole teeth, and a method for manufacturing the same. And

1 of the present invention is a divided skew laminated core configured by laminating laminated core pieces,
For all the laminated core pieces, a partial arc-shaped yoke portion of the number of laminated layers having a size and shape corresponding to the cylindrical yoke portion of the laminated core divided by the number of magnetic pole teeth. , And projecting from the back side or the front side, the skew angle is divided by the number of stacked layers, and the magnetic pole teeth are projected at different angles by unit angles.
This is a divided skew laminated core in which all the laminated core pieces are sequentially laminated so that the projecting angle of the magnetic pole teeth changes from the skew start point to the end point by the unit angle.

  According to 2 of the present invention, in the split skew core of 1 of the present invention, the protruding direction of the magnetic pole teeth is determined from the center of the stacked core manufactured by combining the split skew stacked core formed by stacking the stacked core pieces. This is the same as the direction extending in the radial direction.

  According to a third aspect of the present invention, in the divided skew laminated core according to the first aspect of the present invention, the protruding direction of the magnetic pole teeth is assumed to be located at the center or the center of the skew angle. And a direction in which the other magnetic pole teeth project in the radial direction from the center of the laminated core manufactured by combining the divided skew laminated cores, which are manufactured in combination. It is configured in parallel with the assumed magnetic pole tooth protruding direction.

4 of the present invention sequentially arranges the core material steel plates on a plurality of processing stages of the press device,
Both ends of the yoke part, the back side of the yoke part, and the tip of the magnetic pole teeth, which are common to all the laminated core pieces, are punched by a machining stage having a fixed die among the plurality of machining stages. And
Both sides of the magnetic pole teeth at different positions for each laminated core piece are punched by being displaced by the displacement unit amount from the skew start point to the end point on a processing stage equipped with a movable mold that can be displaced by a predetermined displacement unit,
Next, it is a method for manufacturing a divided skew laminated core by sequentially laminating processed laminated core pieces.

5 of the present invention, the belt-shaped core material steel plate is sequentially sent by a predetermined width and sequentially passed while being placed on each processing stage of the press device,
In a part of each processing stage, at each corresponding portion of the strip-shaped core material steel plate, both ends of the yoke portion having a shape common to all laminated core pieces, sides on the back side of the yoke portion, and magnetic pole teeth The tip is punched with a fixed mold,
And in the other part of each processing stage, it is a movable type capable of displacing both sides of the magnetic pole teeth at different positions for each laminated core element by a predetermined displacement unit, and each displacement unit amount from the skew start point to the end point. Displaced and punched,
Next, it is a method for manufacturing a divided skew laminated core by sequentially laminating processed laminated core pieces.

6 of the present invention is the method of manufacturing a split skew laminated core according to 5 of the present invention, wherein the fixed die is an end punching die for punching both ends of the yoke portion, and a side on the back side of the yoke portion. Or it consists of a punching die that punches out the front side and a tip punching die that punches out the tip of the magnetic pole tooth,
The movable die is constituted by a side punching die that punches both sides of the magnetic pole teeth, and the side punching die is formed with the yoke portion of the laminated core piece being punched in the punching processing stage on both sides of the magnetic pole teeth. One piece with the angle obtained by dividing the skew angle by the number of stacked layers as a unit angle. It is configured so that it can be punched by displacing the unit core angle for each laminated core piece of
The end punching die is placed on the first stage of the processing stage, the base on which the side punching die is attached is placed on the next stage, and the edge punching die and the tip punching die are placed on the last stage. So that they work together,
While feeding the core material steel plate intermittently, at the same time, punching both ends of the yoke part at the first machining stage, punching both sides of the magnetic pole teeth at the next machining stage, and at the back or front of the yoke part at the last machining stage Punch out the edges of the edges and pole teeth,
At this time, the punching on both sides of the magnetic pole teeth rotates the base sequentially so that the projecting angle of the magnetic pole teeth of all the laminated core pieces changes from the skew start point to the end point by the unit angle. While doing
In the last processing stage, the punched laminated core pieces are pushed out to a stacking position below the processing stage, and the punched stacked core pieces are sequentially stacked at the stacking position.

7 of the present invention is the method of manufacturing a split skew laminated core according to 5 of the present invention, wherein the fixed mold is formed by punching both ends of each yoke part, a side on the back side of the yoke part, Consists of a punching die that punches the front edge and a tip punching die that punches the tip of the magnetic pole tooth.
The movable die is constituted by a double-side punching die that punches both sides of the magnetic pole teeth, and the double-side punching die is at least its magnetic pole in relation to the laminated core piece in the punching process on the punching processing stage on both sides of the magnetic pole teeth. Attached to a base that can reciprocate in parallel with the feeding direction of the core material steel plate in the range of the tooth protruding portion, the base is laminated on the uppermost and lowermost parts corresponding to the skew angle for each laminated core piece. The interval obtained by dividing the gap interval of the magnetic pole teeth of the core piece by the number of laminated layers is taken as a unit interval, and the unit interval is moved in parallel with the feeding direction of the core material steel sheet for each laminated core piece. Configured to allow punching operation at that position,
Arrange the die with both ends on the first stage of the processing stage, arrange the base with the die on both sides on the next stage, and arrange the edge die and tip die on the last stage. , Make them work together,
While feeding the core material steel plate intermittently, at the same time, punching both ends of the yoke part at the first machining stage, punching both sides of the magnetic pole teeth at the next machining stage, and at the back or front of the yoke part at the last machining stage Punch out the edges of the edges and pole teeth,
At that time, the punching on both sides of the magnetic pole teeth is performed by moving the base sequentially so that the protruding positions of the magnetic pole teeth of all the laminated core pieces change from the skew start point to the end point by the unit interval. Done
In the last processing stage, the punched laminated core pieces are pushed out to a stacking position below the processing stage, and the punched stacked core pieces are sequentially stacked at the stacking position.

  According to the divided skew laminated core of 1 of the present invention, the skew is constituted by laminating a predetermined number of laminated core pieces, which are divided in units of magnetic pole teeth, and further, the relative positions of the yoke portion and the magnetic pole teeth are sequentially displaced. This is a split skew laminated core for rotating electrical machines with magnetic pole teeth, and in all the laminated core pieces, the yoke part has the same shape, and only the magnetic pole teeth are displaced one by one. It is. Therefore, it is possible to easily form a split skew laminated core having accurate skew magnetic pole teeth by simply superimposing the yoke portions. In addition, since the laminated core pieces themselves have the above-described configuration, their manufacture can be performed easily and accurately.

  As described above, the laminated core having the skewed magnetic pole teeth can be wound around the magnetic pole teeth before being assembled into the laminated core, that is, at the stage of the divided skew laminated core, or can be fitted with a die-coil coil. Therefore, the work is extremely easy, and the winding work and the mounting work of the winding can be automated.

  According to the divided skew laminated core of 2 of the present invention, the protruding direction of the magnetic pole teeth of each laminated core piece constituting the divided skew laminated core is the direction in which the divided skew laminated core should protrude from the portion where it should be laminated. Therefore, it is possible to have an ideal spiral skew magnetic pole tooth.

  According to the divided skew laminated core of 3 of the present invention, the protruding direction of the magnetic pole teeth of each laminated core piece constituting the divided skew laminated core is the direction in which it should protrude from the portion where the laminated skew laminated core is to be laminated. Therefore, it can have an ideal parallel skew magnetic pole tooth.

  According to the method for manufacturing a split skew laminated core of 4 of the present invention, it is easy and accurate to use a single-type press device even though all the laminated core pieces to be laminated have different shapes. In addition, a divided skew laminated core in which such laminated core pieces are laminated can be manufactured.

  According to the manufacturing method of the split skew laminated core of 5 of the present invention, it is easy and accurate to use the press device using the composite mold even though the shapes of all the laminated core pieces to be laminated are different. In addition, a divided skew laminated core in which such laminated core pieces are laminated efficiently can be manufactured.

  According to the method for manufacturing a divided skew laminated core according to the sixth aspect of the present invention, a divided skew laminated core having an ideal spiral skew magnetic pole tooth can be manufactured easily, accurately, and speedily.

  According to the manufacturing method of the divided skew laminated core according to the seventh aspect of the present invention, the divided skew laminated core having the ideal parallel skew magnetic pole teeth can be easily and accurately manufactured more quickly.

1 (a), (b), and (c) are plan views of a part of laminated core pieces constituting a divided skew laminated core 10 for a rotating electrical machine according to the present invention. FIG. 2 shows a part of a laminated core piece for forming a laminated core suitable for an outer cylindrical stator of an internal rotation type rotary electric machine or a rotor of an external rotation type rotary electric machine. That is, FIG. 1A shows the lowermost laminated core piece 10 ₋₁ (first sheet) of n layers, and FIG. 1B shows the laminated core piece 10 _{− (n + in the} middle part. _{1) / 2} ((n + 1) / 2nd sheet), and FIG. 1 (c) illustrates the uppermost laminated core element 10- _n (nth sheet).

As is clear from FIGS. 1A, 1B, and 1C, the laminated core pieces 10 ₋₁ , 10 ₋₂ ... Are magnetic pole teeth 10T protruding inwardly from the partial arc-shaped yoke portion 10Y. And a locking projection 10E for locking a winding (not shown) on both inner ends of the magnetic pole tooth 10T. In this way, the inner side 10U of the yoke portion 10Y from which the magnetic pole teeth 10T protrude is formed in an arc-shaped recess corresponding to the arc-shaped bulge of the outer side.

Further, a projection 12P is formed at the left end of the yoke portion 10Y, and a recess 12H is formed at the right end, and the yoke portions 10Y and 10Y of the laminated core pieces adjacent to each other are fitted by the projection 12P and the recess 12H. Can be combined. These protrusions 12P and recesses 12H are formed by stacking adjacent divided skew laminated cores 10 and laminated yoke portions 10Y and 10Y formed by laminating laminated core pieces 10 ₋₁ , 10 ₋₂ . When the core 10C (see FIGS. 3 and 4) is configured, it becomes an alignment mark to facilitate the assembling work, and also has an effect of preventing misalignment during the connecting work.

  The protrusions 12P and the recesses 12H are not limited to these as long as the yoke portions of the adjacent laminated core pieces can be appropriately coupled to each other, and various configurations can be freely adopted. Is possible.

  Further, a wedge 14 for connecting and fixing to a back yoke (not shown) is formed on the outer side of the yoke portion 10Y, and this also has the same function as the projection 12P and the recess 12H. Various configurations can be freely adopted.

As described above, the protrusion 12P, the recess 12H, and the wedge 14, or a configuration in place of them, is an assembly of the divided skew laminated core 10 formed by laminating the laminated core pieces 10 _-1 , 10 _-2 . Or although it is a structure important for fixing, since it is the same structure in each laminated core piece, the following illustration and related description are abbreviate | omitted.

Between these laminated core pieces 10 _-1 , 10- _{(n + 1) / 2} , 10 _-n shown in FIGS. 1 (a), (b), (c) There are (n−3) / 2 stacked core pieces, each of which is displaced by [skew angle / number of stacked layers n] by the relative position of the magnetic pole teeth 10T with respect to 10Y. Omitted.

Since (n + 1) / 2 is not an integer when n is an even number, in reality, there is no (n + 1) / 2-th laminated core element, and exactly (n + 1) / 2 is n-th. Valid only when is an odd number. When n is an even number, (n + 1) / 2 is read as (n + 1) / 2 ± 1/2, and any one of the (n + 1) / 2 ± 1/2 laminated core pieces is the laminated core piece 10. _{-(n + 1) / 2} is assumed. Even in this case, these drawings are explanatory diagrams, and are not drawn strictly, so they may be used. Since it is as described above, the number of the laminated core pieces existing between the laminated core pieces 10 ₋₁ , 10 _{− (n + 1) / 2} , and 10 _−n is (n−3) / 2. The number of sheets is valid only when n is an odd number. In the case of an even number, this is read as (n-3) / 2 ± 1/2. The same applies to the following.

As described above, between the laminated core pieces 10 ₋₁ and 10 _−n , the relative position of the magnetic pole teeth 10T with respect to the yoke portion 10Y is displaced by n− (skew angle / number of laminated sheets n). There are two laminated core pieces. In this case, the magnetic pole teeth 10T of any laminated core piece are assembled with the split skew laminated core 10 in which the inner ends of the laminated core pieces are laminated. The laminated core 10C is configured to extend toward the center. That is, it is configured to extend toward the center of the yoke portion 10Y.

FIG. 2 shows a split skew laminated core 10 of the present invention. This divided skew laminated core 10 is shown in FIGS. 1 (a), (b), (c) and described above, and the laminated core pieces 10 ₋₁ ... 10 _{− (n + 1) / 2} . It is configured by stacking n stacked core pieces including _-n , and one magnetic pole tooth is skewed by one slot. As described above, a required number of these can be combined to form a stator laminated core for an adder-type rotating electrical machine or a rotor laminated core for an outer-rotor-type rotating electrical machine.

As shown in FIG. 2, each of the laminated upper and lower laminated core pieces 10 _-1 , 10 _-2, etc. is engaged with a pair of caulking portions 16, 16 formed on the yoke portion 10 Y, respectively. .., Respectively, to form a divided skew laminated core 10 in which all laminated core pieces 10 ₋₁ , 10 ₋₂ . As described above, in the laminated core pieces 10 ₋₁ , 10 ₋₂ ..., The magnetic pole teeth 10T are displaced from the lowermost layer to that of the uppermost layer by one predetermined angle from one to the other with respect to the yoke portion 10Y. As described above, for example, the divided skew laminated core 10 that is skewed by one slot is configured.

At this time, the laminated core pieces 10 ₋₁ , 10 ₋₂ ... Have a configuration in which only the magnetic pole teeth 10T are displaced with respect to the yoke portion 10Y for each piece as described above, and the yoke portion 10Y is displaced. Since the upper and lower yoke portions 10Y are simply accurately overlapped, the fitting portions 16 and 16 of the upper and lower laminated core pieces 10 _-1 , 10 _-2, etc. It can be fixed and fixed easily and reliably. In addition, simply by accurately superimposing the upper and lower yoke portions 10Y side in the correct order, the magnetic pole teeth 10T side are sequentially skewed accurately. Therefore, a good split skew laminated core 10 with high accuracy can be easily manufactured.

  As will be described later, such a split skew laminated core 10 is formed by placing a crimped portion 16 of, for example, a square shape on the yoke portion 10Y at any processing stage in the pressing process. At the end of the processing step, when the laminated core piece that has been punched is pushed out, it is sequentially pressed and laminated on the preceding processed laminated core piece, thereby the caulking part 16 of the yoke part 10Y is It can be configured by being easily fitted to the crimped portion 16 of the yoke portion 10Y of the processed laminated core piece.

  As described above, the divided skew laminated core 10 described above is an example of a rotor constituting an inner rotation type rotary electric machine or an outer rotation type rotary electric machine. The laminated core of the stator or rotor is divided into the number of magnetic pole teeth. In the drawing, as shown particularly in FIG. 4, an example of 24 divisions is shown.

  When manufacturing a laminated core constituting a rotor or a stator by combining the divided skew laminated cores 10 divided as described above, the whole is divided into two groups, three groups, or four groups. It is also possible to assemble each by combining each set of annular bodies so as to form an annular shape when viewed from the plane after combining them in a partial annular shape when viewed from the plane, or a fully divided skew lamination It is also possible to assemble the entire core at once by arranging the cores 10, 10. In any case, when assembling the whole, it is arranged so that the diameter is slightly larger than the planned diameter, and finally it is slightly tightened from the outside, and a laminated core constituting a rotor or stator of a predetermined diameter 10C can be assembled.

  In the example shown in the drawing, since the divided skew laminated core 10 is divided into 24 as described above, the rotor or stator laminated core 10C is assembled by combining 24 pieces. In this case, for example, four sets of annular bodies in which six of the divided skew laminated cores 10 are combined are configured in advance, and four of these are further combined to obtain a complete annular laminated core 10C. Can do. It is also possible to construct two sets of annular bodies in which twelve divided skew laminated cores 10 are combined in advance, and to combine these two to obtain a complete annular laminated core 10C. Needless to say, as shown in FIG. 5, it is also possible to assemble a complete annular laminated core 10C from the beginning by combining 24 divided skew laminated cores 10 at the same time. As shown in FIG. 5, when assembling the whole, the divided skew laminated cores 10 or an annular body obtained by combining several of them are arranged so that the diameter is slightly larger than the planned diameter, Finally, it is possible to assemble the laminated core 10C constituting a rotor or stator having a predetermined diameter by slightly tightening from the outside toward the center. Thus, as shown in FIG. 4, the laminated core 10C constituting the rotor or the stator can be assembled.

  As described above, the split skew laminated core 10 has protrusions 12P protruding from both ends of the yoke portion 10Y of each laminated core piece constituting the divided core and protrusions and recesses due to the recess 12H protruding from both ends of the yoke portion. The adjacent divided skew laminated cores 10 and 10 are coupled to each other while being accurately positioned by fitting each other. Alternatively, in the case where something similar to the protrusion 12P and the recess 12H is configured, they are coupled while being positioned accurately in the same manner.

  FIG. 3 shows a part of the laminated core 10C formed by combining the divided skew laminated cores 10, but the part is shown for the convenience of showing adjacent mutual connecting portions at the same time. In the above description, it is described that the divided skew laminated core 10 is assembled to the laminated core 10C in a state where no coil is attached. However, this is for the convenience of explanation, and actually the divided skew laminated core. 10, 10,... Are each wound with a corresponding coil or mounted with a coiled coil, and then the above assembling work is performed.

  Thus, by performing the work of winding the coil or mounting the die-winding coil not at the stage of the laminated core 10C but at the stage of the divided skew laminated core 10, the work becomes extremely easy, and the winding work or the mold winding is performed. Coil mounting work can be automated.

6 (a), 6 (b), and 6 (c) are plan views of some laminated core pieces constituting the divided skew laminated core 20 for a rotating electrical machine according to another example of the present invention. internal cylindrical as a yoke portion, the inner rotor type rotating electric machine rotor or outer rotor type rotating electrical machine of the part of the laminated core segment 20 _-n for constituting the laminated core 20C suitable for the stator, 20 _{- (n + 1) / 2} and 20 ₋₁ are shown. That is, FIG. 6 (a) shows the uppermost laminated core piece 20- _n (nth sheet) of n layers, and FIG. 6 (b) shows the middle laminated core piece 20- _{(n +). 1) / 2} ((n + 1) / 2nd sheet), and FIG. 6 (c) shows the lowermost laminated core piece 20 _-1 (first sheet).

As apparent from FIGS. 6 (a), 6 (b), and 6 (c), the laminated core pieces 20 _-1 , 20 _-2 ... Are magnetic pole teeth 20T protruding outward from the partial arc-shaped yoke portion 20Y. And a locking projection 20E for locking a winding (not shown) on both sides of the outer end of the magnetic pole tooth 20T. In this way, the outer side 20U of the yoke portion 20Y from which the magnetic pole teeth 20T protrude is formed in an arcuate bulge.

Also each end of該継iron unit 20Y, similarly to the laminated core segment 10 ₁ and the like shown in FIG. 1, previously subjected to a configuration having the same function as protrusion 12P or recess 12H, or which Should.

Between these laminated core pieces 20 _-n , 20- _{(n + 1) / 2} , 20 _-1 shown in FIGS. 6 (a), (b) and (c) There are (n−3) / 2 stacked core pieces, each of which is displaced by [skew angle / number of stacked sheets n] by the relative position of the magnetic pole teeth 20T with respect to 20Y. Omitted. This is the same as described with reference to FIG.

As described above, between the laminated core pieces 20 _-n and 20 ₋₁ , the relative position of the magnetic pole teeth 20T with respect to the yoke portion 20Y is displaced by n− (skew angle / number of laminated sheets n). There are two laminated core pieces. In this case, the pole teeth 20T of any laminated core piece have split skew laminated cores in which the inner ends of the laminated core pieces are laminated. 20 is configured to extend in the radial direction from the center of the laminated core 20 </ b> C assembled in 20.

FIG. 7 shows a divided skew laminated core 20 of another example of the present invention. This split skew laminated core 20 is shown in FIGS. 6A, 6B, and 6C, and the laminated core pieces 20 ₋₁ , 20 _{− (n + 1) / 2} , 20 _{−n described above.} Are formed by laminating n laminated core pieces including the magnetic pole teeth of one divided core skewed by one slot. As described above, the required number of these can be combined to form a laminated core for a rotor of an inner rotary electric machine or a laminated core for a stator of an outer rotary electric machine.

The upper and lower laminated core pieces 20 _-1 , 20 _-2, etc., which are laminated are joined to each other by fitting the caulking parts formed on the yoke part 20 Y etc. 20 ₋₁ , 20 ₋₂ , etc. constitute a split skew laminated core 20 that is fixedly coupled. As described above, in the laminated core pieces 20 _-1 , 20 _-2 ..., The magnetic pole teeth 20T from the lowermost layer to that of the uppermost layer are provided with the magnetic pole teeth 20T from one side to the other. For example, as described above, the divided skew laminated core 20 is formed by skewing by one slot by forming the positional relationship shifted by an angle and sequentially laminating them.

At this time, the laminated core pieces 20 _-1 , 20 _-2 ... Have a configuration in which only the magnetic pole teeth 20T are displaced with respect to the yoke portion 20Y for each piece as described above, and the yoke portion 20Y is displaced. Since the upper and lower yoke portions 20Y are simply accurately overlapped, the upper and lower laminated core pieces 20 _-1 and 20 _-2 can be easily fixed by the caulking portions between the yoke portions 20Y and the like. And it can be done reliably. Further, simply by accurately superimposing the upper and lower yoke portions 20Y in the correct order, the magnetic pole teeth 20T side is sequentially accurately skewed. As a result, a good split skew laminated core 20 with high accuracy can be easily manufactured.

  Similar to the above-described divided skew laminated core 10, the divided skew laminated core 20 can be configured to be laminated and fixed at the end of the pressing process.

  As described above, the divided skew laminated core 20 described above is an example of a rotor constituting an inner rotary electric machine or a stator constituting an outer rotary electric machine. The laminated core of the stator or rotor is divided into the number of magnetic pole teeth. In FIG. 8, an example of 18 divisions is shown.

  When manufacturing the laminated core 20C constituting the rotor or the stator by combining the divided skew laminated cores 20 divided as described above, the same procedure as described for the divided skew laminated core 10 is performed. Can do. FIG. 8 shows an assembled laminated core 20C having 18 magnetic pole teeth. In FIG. 8, the divided skew laminated core 20 is depicted as assembled to a laminated core with no coil attached thereto. This shows the coupling relationship between the divided skew laminated cores 20 and 20. This is due to the convenience of drawing, which is easy. Actually, each of the divided skew laminated cores 20 is wound with a corresponding coil or mounted with a coiled coil, and then the above assembling work is performed. .

  Thus, by performing the work of winding the coil or mounting the die-wound coil at the stage of the divided skew laminated core 20 instead of the state of the laminated core 20C, the work becomes extremely easy, and the winding work or winding The mounting work can be automated.

9A, 9B, and 9C are plan views of a part of the laminated core pieces constituting the divided skew laminated core 30 for a rotating electrical machine according to the present invention. FIG. 12 shows a part of laminated core pieces for constituting a laminated core 30 </ b> C (see FIG. 12) suitable for an outer cylindrical stator of an internal rotation type rotary electric machine or a rotor of an external rotation type rotary electric machine. That is, FIG. 9A shows the lowermost laminated core piece 30 _-1 (first sheet) of n layers, and FIG. 9B shows the laminated core piece 10- _{(n + in the} middle part. _{1) / 2} ((n + 1) / 2nd sheet), and FIG. 9C illustrates the uppermost laminated core piece 10- _n (nth sheet).

Above in FIG. 9 (a), (b) , (c) to As is apparent, the laminated core segment 30 _-1, 30 _-2 ... magnetic pole teeth 30T projecting from partial arc shaped yoke portion 30Y inside There are provided locking projections 30E for locking a winding (not shown) on both sides of the inner end of the magnetic pole tooth 30T. In this way, the inner side 30U of the yoke portion 30Y from which the magnetic pole teeth 30T protrude is formed linearly.

Further, it is preferable that the both ends of the yoke portion 30Y have the projections 12P or the recesses 12H, or a similar configuration, similar to the laminated core pieces 10 _-1 , 10 _-2 . It is. Furthermore the outer side of該継iron unit 30Y, the laminated core segment 10 _-1, 10 _-2 ... similar to the, like the wedge 14 to or for coupling fixed to the back yoke, not shown It is appropriate to apply the configuration.

Between these laminated core pieces 30 _-1 , 30- _{(n + 1) / 2} , 30 _-n shown in FIG. 9 (a), (b), (c) There are (n−3) / 2 laminated core pieces, each of which is displaced by [the width corresponding to the skew angle / number of laminated sheets n] by the relative position of the magnetic pole teeth 30T with respect to 30Y, but in order to avoid complications Detailed illustration is omitted. The purpose of the omission is the same as that described with reference to FIG.

As described above, during lamination core segment 30 _-1 and 30 _-n is the relative position of the magnetic pole teeth 30T for those yoke sections 30Y [skew angle (the angle in this case is 1/4 slots) There are n-2 laminated core pieces displaced by the width (interval) / number of laminated sheets n] corresponding to the magnetic pole teeth 30T of the laminated core pieces other than the center in this case. It is configured in parallel with the magnetic pole teeth 30T of the central laminated core piece 30- _{(n + 1) / 2} shown in b).

Note that the magnetic pole teeth 30T of the central laminated core piece 30- _{(n + 1) / 2} are directed toward the center direction of the laminated core 30C assembled by the divided skew laminated core 30 obtained by laminating the laminated core pieces including these. To extend. However, when the number of laminated core pieces is an even number, strictly speaking, there is no central laminated core piece 30- _{(n + 1) / 2} , but in this case, the central laminated core piece is not present. Assuming that the magnetic pole teeth 30T are configured in the same way as the magnetic pole teeth 30T of the central laminated core piece when n is an odd number, all the magnetic pole teeth 30T of the other laminated core pieces are included in it. Configure in parallel.

FIG. 10 shows a divided skew laminated core 30 according to still another example of the present invention. This divided skew laminated core 30 is shown in FIGS. 9A, 9B, and 9C, and the laminated core pieces 30 ₋₁ ... 10 _{− (n + 1) / 2} . _{In this example, n} laminated core pieces including _-n are laminated, and the magnetic pole teeth of one divided skew laminated core 30 are skewed by 1/4 slot. As described above, a required number of these can be combined to form a stator laminated core for an adder-type rotating electrical machine or a rotor laminated core for an outer-rotor-type rotating electrical machine.

The stacked upper and lower laminated core pieces 30 _-1 and 30 _-2 etc. are formed in the yoke part 30Y in the same manner as the laminated core pieces 10 _-1 and 10 _-2 etc. shown in FIG. Each of the laminated core pieces 30 _-1 , 30 _-2 ... Is joined and fixed by the crimped portions and the like to constitute a divided skew laminated core 30. As described above, in the laminated core pieces 30 _-1 , 30 _-2 ..., The magnetic pole teeth 30T are displaced by one predetermined width from one to the other with respect to the yoke portion 30Y from the lowermost layer to the uppermost layer. As described above, for example, the divided skew laminated core 30 that is skewed by 1/4 slot is configured.

At this time, the laminated core pieces 30 _-1 , 30 _-2 ... Have a configuration in which only the magnetic pole teeth 30T are displaced with respect to the yoke portion 30Y for each piece as described above. _-1 , 10 _-2 ... Can be manufactured easily with high accuracy and good divided skew laminated core 30.

  As described above, the divided skew laminated core 30 described above is an example of a stator constituting an inner rotary electric machine or a rotor of an outer rotary electric machine. A laminated core of a stator or a rotor is divided into the number of magnetic pole teeth. As in the case of the divided skew laminated core 10, an example of 24 divisions is shown in the drawing (refer to FIG. 12 in particular).

  In the case of manufacturing the laminated core 30C constituting the rotor or the stator by combining the divided skew laminated cores 30 divided as described above, it is exactly the same as the example shown in FIGS. This is done by exactly the same operation as the case where the laminated cores 10 are combined, and the laminated core 30C can be assembled easily and accurately as shown in FIGS.

  Also in this case, the coil is not drawn in FIGS. 11 and 12, but this is for the convenience of drawing to make it easy to understand the assembled state of the divided skew laminated core 30. Needless to say, the core 30 is wound with a corresponding coil or a coiled coil, and then the above assembly operation is performed.

  Thus, by performing the work of winding a coil or mounting a die-wound coil not at the stage of the laminated core 30C but at the stage of the divided skew laminated core 30, the work becomes extremely easy. It is possible to automate the mounting operation of the same as in the other examples described before.

FIGS. 13A, 13B, and 13C are plan views of some laminated core pieces constituting a divided skew laminated core 40 (see FIG. 14) for a rotating electrical machine according to still another example of the present invention. FIG. 15 is a diagram showing a part of an inner cylindrical core that is a yoke part and that is suitable for a rotor of an internal rotation type rotary electric machine or a stator of an external rotation type rotary electric machine (see FIG. 15). The laminated core pieces 40 _-n , 40- _{(n + 1) / 2} and 40 _-1 are shown. 13A shows the lowermost laminated core piece 40 _-1 (first sheet) of n layers, and FIG. 13B shows the middle laminated core piece 40- _{(n + 1) / 2} ((n + 1) / 2nd sheet), and FIG. 13 (c) shows the uppermost laminated core piece 40- _n (nth sheet).

As is clear from FIGS. 13A, 13B, and 13C, the laminated core pieces 40 _-1 , 40 _-2 ... Are magnetic pole teeth 40T protruding outward from the partial arc-shaped yoke portion 40Y. And a locking projection 40E for locking a winding (not shown) on both sides of the outer end of the magnetic pole tooth 40T. In this way, the outer side 40U of the yoke portion 40Y from which the magnetic pole teeth 40T protrude is formed in a straight line.

Also each end of該継iron unit 40Y, similarly to the laminated core segment 10 ₁ and the like shown in FIG. 1, previously subjected to a configuration having the same function as protrusion 12P or recess 12H, or which Is appropriate.

Between these laminated core pieces 40 _-1 , 40- _{(n + 1) / 2} , 40 _-n shown in FIGS. 13 (a), (b) and (c) There are (n−3) / 2 laminated core pieces, each of which is displaced by [width (interval) corresponding to skew angle / number of laminated sheets n] relative positions of the magnetic pole teeth 40T with respect to 40Y. In order to avoid this, detailed illustration is omitted. This is the same as described with reference to FIG.

As described above, during lamination core segment 40 _-1 and 40 _-n is the relative position of the magnetic pole teeth 40T for those yoke portion 40Y [width corresponding to the skew angle (interval) / the number of laminated sheets n] There are n-2 laminated core pieces displaced by minutes. In this case, the magnetic pole teeth 40T of the laminated core pieces other than the center are formed in the central laminated core piece 40 shown in FIG. _{-(n + 1) / 2} magnetic pole teeth 40T are configured in parallel.

Note that the magnetic pole teeth 40T of the central laminated core piece 40- _{(n + 1) / 2} are radiated from the center of the laminated core 40C assembled by the divided skew laminated core 40 obtained by laminating the laminated core pieces having these core teeth. It is configured to extend toward However, when the number of laminated core pieces is an even number, strictly speaking, the central laminated core piece 40- _{(n + 1) / 2} does not exist, but in this case, the central laminated core piece is not present. Assuming that the magnetic pole teeth 40T are configured in the same manner as the magnetic pole teeth 40T of the central laminated core piece when n is an odd number, all the magnetic pole teeth 40T of the other laminated core pieces Configure in parallel.

FIG. 14 shows a divided skew laminated core 40 according to still another example of the present invention. This divided skew laminated core 40 is composed of laminated core pieces 40 ₋₁ , 40 _{− (n + 1) / 2} , 20 _−n shown in FIGS. 13A, 13B and 13C and described above. In this case, n pieces of laminated core pieces including the laminated core are laminated, and the magnetic pole teeth of one divided skew laminated core 40 are skewed by 1/8 slot. As described above, the required number of these can be combined to form a laminated core for a rotor of an inner rotary electric machine or a laminated core for a stator of an outer rotary electric machine.

The upper and lower laminated core pieces 40 _-1 , 40 _-2 etc., which are laminated, are joined to each other by fitting the caulking parts etc. formed in the yoke part 40Y etc., respectively. 40 ₋₁ , 40 ₋₂ , etc. constitute a split skew laminated core 40 that is fixedly coupled. As described above, the laminated core pieces 40 _-1 , 40 _-2 ... Have the magnetic pole teeth 40T with respect to the yoke portion 40Y from that of the lowermost layer to that of the uppermost layer. For example, as described above, the divided skew stacked core 40 skewed by 1/8 slot is formed by forming the positional relationships displaced by unit widths and sequentially stacking them.

At this time, the laminated core pieces 40 _-1 , 40 _-2 ... Have a configuration in which only the magnetic pole teeth 40T are displaced with respect to the yoke portion 40Y for each piece as described above, and the yoke portion 40Y is displaced. Since the upper and lower yoke portions 40Y are simply accurately overlapped, the upper and lower laminated core pieces 40 _-1 and 40 _-2 can be easily fixed by the caulking portions between the yoke portions 40Y and the like. And it can be done reliably. Further, simply by accurately superimposing the upper and lower yoke portions 40Y side in the correct order, the magnetic pole teeth 40T side sequentially skews accurately. For this reason, it is possible to easily manufacture a good divided skew laminated core 40 with high accuracy.

  Such a divided skew laminated core 40 can be configured to be laminated and fixed at the end of the press working step, similarly to the divided skew laminated core 10 described above.

  As described above, the divided skew laminated core 40 described above is an example of a rotor constituting an inner rotary electric machine or a stator constituting an outer rotary electric machine. The laminated core of the stator or rotor is divided into the number of magnetic pole teeth. FIG. 15 shows an example of 18 divisions.

  When manufacturing the laminated core 40C constituting the rotor or the stator by combining the divided skew laminated cores 40 divided as described above, the same procedure as described for the divided skew laminated core 10 is performed. Can do. FIG. 15 shows an assembled laminated core having 18 magnetic pole teeth. In FIG. 15, the divided skew laminated core 40 is depicted as assembled to a laminated core with no coil attached, but this shows the coupling relationship between the divided skew laminated cores 40, 40. This is due to the convenience in drawing, and in the same manner as in the other examples described above, the divided skew laminated core 40 is actually wound with a corresponding coil or a die coil. The above assembly work is performed.

  As described above, by performing the work of winding the coil or mounting the die-wound coil at the stage of the divided skew laminated core 40 instead of the stage of the laminated core 40C, the work becomes extremely easy. It is possible to automate the mounting operation of the same as in the other examples described above.

By the way, in manufacturing the divided skew laminated cores 10 and 20 having the shapes shown in FIGS. 2 and 7 of the present invention, the laminated core pieces 10 ₋₁ , 10 ₋₂ ... 20 ₋₁ , 20 ₋₂ . The operations from the punching process to the stacking and fixing thereof can be performed continuously.

  For example, as shown in FIG. 16, a core material steel plate S such as a band-shaped silicon steel plate or electromagnetic steel plate, which is a laminated core material, is set so as to pass through each processing stage of the press device, and this is sequentially and intermittently supplied. It can be configured so that it can be continuously processed while being fed. Alternatively, a core material steel plate such as a small piece piece of silicon steel plate or electromagnetic steel plate, which is a laminated core material, can be continuously processed while being sequentially arranged on each processing stage of the press device. The former is a progressive feed by a composite die, and the latter is a single die, but the machining operations performed at individual machining stages are the same. The following explanation is based on the assumption of a composite type.

  In pressing, any part of the laminated core piece from the bottom layer to the top layer where the shape does not change, that is, both ends of the yoke part, the side on the back side (side where the magnetic pole teeth are joined (front side) The side of the side) and the side of the opposite side), the front side, and the tip of the magnetic pole teeth can be punched by a fixed die whose relative position does not change.

  On the other hand, in the magnetic pole teeth, the position of the front side (or the back side) of the yoke part to which the magnetic pole teeth are coupled is sequentially changed from the lowest layered core element to that of the uppermost layer. Since the skew angle is divided by a unit angle obtained by dividing the skew angle by the number of laminated sheets from a certain part on one end side to a certain part on the other end side, the movable die punched on both sides is changed for each laminated core piece. Punching should be performed while the amount is sequentially displaced by the unit angle.

  In addition, from the part on one side of the side on the front side or the side on the back side of the yoke part to the part on the other end side corresponds to the “skew angle” in the above [skew angle / number of stacked layers]. Shall. That is, the center of the laminated core manufactured by the divided skew laminated core obtained by laminating these laminated core pieces, and the “part on one end side” of the front side or the back side of the yoke portion and “ The angle formed by the lines connecting the “parts on the other end side” is the “skew angle”.

  As described above, in such a pressing process, while the core material steel sheet S is sequentially fed, a portion having a constant shape is always punched by a fixed die, and a portion having a change from one piece to another is formed by moving a movable die one by one. Punching after displacement by the unit change amount, and each time one punching is completed, a lamination process is performed in which the laminated core pieces that have been punched are overlapped in conjunction with the pressing process. it can.

  The movable mold has a circular arc formed when the yoke portion of the laminated core piece is extended in the end direction in relation to the laminated core piece in the punching process on both sides of the magnetic pole teeth. Mounted on a rotating base with the point corresponding to the center as the rotation center, and the base is displaced by the unit angle for each laminated core element, with the angle obtained by dividing the skew angle by the number n of laminated layers as a unit angle By performing the punching operation, the magnetic pole teeth can be easily and accurately punched from the first laminated core piece to the nth laminated core piece.

  When the final punching process is completed, the stacking process is extremely easy if the stacked core piece that has been punched is pushed into a predetermined stacking part and pressure-laminated to the previously pressed stacked core piece. In addition, the lamination of the laminated core pieces from the first sheet to the nth sheet can be completed.

  The projections 12P and the recesses 12H configured at both ends of the yoke portion or a configuration similar thereto, or the crimping portion 16 or a configuration similar thereto are pressed at an appropriate stage by adding a necessary configuration to the fixed mold or another mold. It is possible to process.

  Summarizing the machining configured in this way, (1) the punching process on both sides of the yoke, (2) the punching process with the angular displacement of both sides of the magnetic pole teeth, (3) the back surface of the yoke and the magnetic pole A laminated core piece corresponding to a predetermined laminated portion of the divided skew laminated core is obtained by three steps of the tooth tip punching process, and (4) a laminated step of laminating the obtained laminated core pieces in that order. As a result, it is possible to manufacture a split skew laminated core in which the laminated core pieces are laminated.

Further, in manufacturing the divided skew laminated cores 30 and 40 having the shapes shown in FIGS. 10 and 14 of the present invention, the laminated core pieces 30 ₋₁ , 30 ₋₂ ... 40 ₋₁ , 40 ₋₂ . The operations from the punching process to the stacking and fixing thereof can be performed continuously.

  For example, as described above and as shown in FIG. 17, the core material steel plate S can be set so as to pass through the processing stage of the press device, and can be continuously processed while being fed sequentially. . In this case as well, naturally, it is possible to continuously process the core material steel plate such as a small piece piece silicon steel plate or electromagnetic steel plate, which is a material for the laminated core, while sequentially arranging it on each processing stage of the press device. Can be configured. The former is a progressive feed by a composite die, and the latter is a single die, but the machining operations performed at individual machining stages are the same. In this case as well, the following description will be based on the assumption of a composite type.

  In pressing, any part of the laminated core piece from the bottom layer to the top layer where the shape does not change, that is, both ends of the yoke part, the front side edge or the back side edge of the yoke part In addition, the tip of the magnetic pole tooth is punched by a fixed die whose relative position does not change, whereas the magnetic pole tooth is the front side (or the back side) of the yoke part to which it is coupled. ) Position in the range (interval) from a part on one side of the side corresponding to the skew angle to a part on the other side, sequentially from the lowermost laminated core piece to that of the uppermost layer, In order to change the range (interval) by the unit width divided by the number of stacked layers, the punching process should be performed while the movable die punched on both sides is sequentially displaced by the unit width for each stacked core piece. .

  In addition, the movable mold | type more than punching the both sides of a magnetic pole tooth is comprised so that the magnetic pole tooth to be punched can be punched in the state which turned to the next direction. That is, the protruding direction of the magnetic pole teeth other than the magnetic pole teeth (hereinafter referred to as the central magnetic pole teeth) that are assumed to be located at the center or the center of the skew angle is made parallel to the protruding direction of the central magnetic pole teeth. The projecting direction of the magnetic pole teeth at the center is made to coincide with the direction extending in the radial direction from the center of the laminated core manufactured by combining the divided skew laminated cores formed by laminating the laminated core pieces.

  As described above, in such a pressing process, while the core material steel sheet S is sequentially fed, a portion having a constant shape is always punched by a fixed die, and a portion having a change from one piece to another is formed by moving a movable die one by one. Punching after displacing by the unit change amount, and stacking the punched laminated core piece on the preceding laminated core piece in conjunction with the pressing process each time punching is completed. Can be done.

  The movable mold is attached to a base that can reciprocate in parallel with the feed direction of the core material steel sheet S at least in the range of the magnetic pole tooth projecting portion in relation to the punched laminated core piece on the punching processing stage. The feed direction of the core material steel sheet S by a unit width obtained by dividing the base by the interval between the lowermost magnetic pole teeth and the uppermost magnetic pole teeth, that is, the interval corresponding to the skew angle, by the number of laminated core pieces. The magnetic pole teeth that constitute the parallel skew are moved from the first laminated core element to the nth laminated core element. It is possible to easily and accurately punch a piece.

  The processing steps configured in this way are basically the same as those shown above and shown in FIG. 16 except that there is a slight difference in the movement of the movable type. Can be easily manufactured.

  In FIG. 16, the laminated core material S, which is a band-shaped silicon steel plate or electromagnetic steel plate, is intermittently sequentially from left to right in the drawing as indicated by an arrow a on all the processing stages of the press device. To feed. Further, the processing stages arranged from the left to the right of the press apparatus include end cutting dies 50 and 52 for process I, side cutting dies 54 and 56 for process II, edge cutting dies 58 for process III, and tips. The punching dies 60 are arranged in that order.

  The end punching dies 50 and 52 for the process I are fixed dies, and as shown in the figure, a die not shown in the positional relationship of punching both ends of the yoke part of the laminated core piece at the stage of the process I. Secure to the frame. In addition, the side punching die 58 and the tip punching die 60 for the process III are also fixed, and as shown in the figure, the side punching die 58 is used for the yoke portion of the laminated core piece at the stage of the step III. In the positional relationship of punching the side on the back side, the die frame is fixed to the die frame, and the tip punching die 60 is similarly placed in the positional relationship of punching the tips of the magnetic pole teeth of the laminated core piece in the step III. Secure to the frame.

  Note that the end punching dies 50 and 52 for the step I are configured with projections or recess forming portions (not shown), with projections at one end of the yoke portion of the laminated core piece and at the other end. Can be formed by punching each of the recesses. Further, in the step I, a pair of caulking portions can be pressed and formed on the yoke portion by another mold (not shown).

  In contrast to these fixed molds, the side punching molds 54 and 56 for the step II are movable molds, and as shown in the figure, on a base 62 disposed so as to be rotatable around a rotation center C. It is fixed. The rotation center C corresponds to the center of a virtual arc formed when the yoke portion of the laminated core piece on the laminated core material S punched in the step II is extended in the end direction. It shall be set to the point to be. The base 62 is attached to the mold frame so as to be rotatable about the rotation center C as described above.

  A sector gear 66 that meshes with a pinion 64 is formed on the side of the base 62 opposite to the rotation center C, and the pinion 64 is rotationally driven by a stepping motor (not shown). The stepping motor is controlled by a control means so that the pinion 64 can be rotated to rotate the base 62 by a unit angle. The unit angle is an angle corresponding to [skew angle / number of stacked layers].

  Below the processing stage in step III, a laminated portion having a predetermined depth (not shown) is formed adjacent to the lower mold. The laminated portion is a space having guide walls that are in contact with both ends of the yoke portion having the same shape and dimension in all the laminated core pieces. At the same time, a pushing means for pushing into the laminated portion is also provided.

  The molds for the above processes I, II, and III are all arranged in the same mold frame, and the punching operation is performed at the same time.

  Accordingly, while the core material steel plate S is intermittently fed, the machining operation is performed simultaneously on all the machining stages. In the processing stage for the first step I, both ends of the yoke part are punched out together with the protrusions and the recesses by the end punching dies 50 and 52, and at the same time, a pair of crimping parts are pressed and formed in the yoke part. In the processing stage for the next step II, both sides of the magnetic pole teeth are punched out by the side punching dies 54 and 56. This is performed after the base 62 is rotated to a necessary angle by a corresponding fixed rotation operation of the pinion 64 prior to this. At the start of punching, the base 62 in FIG. 16 is set in a state where the upper part is rotated to the leftmost side, and thereafter, after sequentially rotating to the right by the unit angle, the punching operation is started. become. In the last processing stage for Step III, simultaneously with Steps I and II, the side on the back side of the yoke portion is punched by the edge-cutting die 58 and the tip of the magnetic pole tooth is punched by the tip-cutting die 60, respectively. In this processing stage, when the processing of the laminated core piece is further completed, the laminated core piece that has been processed by the pushing means is simultaneously laminated.

  As described above, the laminating operation by the pushing means is performed by pushing the laminating core piece that has been punched into the laminating portion, which is a lower space, on the processing stage of Step III. If the previously processed laminated core piece is pushed into the laminated portion, the subsequent laminated core piece is pressed onto the laminated portion, and the pair of caulking portions formed in the yoke portion are fitted to each other. Therefore, it is fixed in a laminated state.

  By repeating the above steps, one set of laminated core pieces is sequentially punched and sequentially laminated and fixed, thereby completing the production of one divided skew laminated core.

In the above, since the manufacturing process was performed using the mold as described above, the laminated core pieces 10 ₋₁ , 10 ₋₂ ... Shown in FIG. The divided skew laminated core 10 shown in (1) can be manufactured easily and with high accuracy.

Thus, in the above, the process of manufacturing the divided skew laminated core 10 shown in FIG. 2 has been described. However, each die shown in FIG. 16 has a yoke portion on the rotating shaft side and a magnetic pole. If the laminated core piece for producing the inner cylindrical laminated core whose teeth are radially outward is changed to a die for punching, the same process is followed to obtain the laminated core piece 20 _-1 shown in FIG. 20 ₋₂ ... Can be formed by punching, and these can be laminated to produce the divided skew laminated core 20 shown in FIG.

  These divided skew laminated cores can be easily manufactured as described above, and can be easily assembled into a laminated core as described above. It is also possible to easily perform winding work or mounting a coil winding coil on the magnetic pole teeth before assembling the laminated core, and it is easy to automate these work if necessary.

  In FIG. 17, the laminated core material S, which is a band-shaped silicon steel plate or electromagnetic steel plate, is intermittently sequentially from left to right in the drawing, as indicated by arrows b, at each processing stage of the press device. To feed. The processing stages of the press apparatus are arranged side by side from left to right, and in each of these stages, end cutting dies 70 and 71 for process I and side cutting dies for process II are arranged in the order described below. 72, 73 and the edge punching die 74 and the tip punching die 75 for the process III are arranged from the left to the right.

  The end punching molds 70 and 71 for the process I are fixed molds, and as shown in the figure, a mold frame not shown in the positional relationship of punching both ends of the yoke part of the laminated core piece at the stage of the process I. Secure to. In addition, the side punching die 74 and the tip punching die 75 for the process III are also fixed, and as shown in the figure, the side punching die 74 is used as the yoke part of the laminated core piece at the stage of the step III. The tip punching die 75 is fixed to the die frame in a positional relationship by punching the tips of the magnetic pole teeth of the laminated core piece in the step III. Secure. These configurations are the same as those of the first embodiment.

  Note that the end punching dies 70 and 71 for the step I are configured with projections or recess forming portions (not shown), with projections at one end of the yoke portion of the laminated core piece and at the other end. Can be formed by punching each of the recesses. Further, in the step I, a pair of caulking portions can be pressed and formed on the yoke portion by another mold (not shown). This is the same as that of the first embodiment.

  In contrast to these fixed molds, the side punching molds 72 and 73 for the step II are movable molds, and reciprocate in parallel with the feeding direction of the laminated core material S as indicated by an arrow c in FIG. It is fixed to a base 76 that is movably arranged. The base 76 divides the interval between the magnetic pole teeth corresponding to the skew angle of the target divided skew laminated core, that is, the interval between the lowermost magnetic pole tooth and the uppermost magnetic pole tooth by the number of laminated core pieces. The division interval obtained in this way is defined as a unit movement width, and the unit movement width is moved in parallel with the feeding direction of the laminated core material S so that both sides of different magnetic pole teeth are punched out one by one.

  The base 76 is located at the left end in FIG. 17 immediately after the start of the punching operation. At that position, the both sides of the magnetic pole teeth are punched by the side punching dies 72 and 73. After the base 76 moves to the right by the unit movement width, both side portions of the magnetic pole teeth are punched by the side punching dies 72 and 73, and thus the base 76 finally moves to the rightmost side. The punching operation on both sides of the magnetic pole teeth is performed.

  The base 76 includes a reciprocating drive mechanism with control means (not shown), and is driven while being controlled as described above by the control means.

  Below the processing stage in step III, a laminated portion having a predetermined depth (not shown) is formed adjacent to the lower mold. The laminated portion is a space having guide walls that are in contact with both ends of the yoke portion having the same shape and dimension in all the laminated core pieces, and the laminated core piece that has been punched on the upper mold side is completed. At the same time, a pushing means for pushing into the laminated portion is also provided.

  The molds for the above processes I, II, and III are all arranged in the same mold frame, and the punching operation is performed at the same time.

  Accordingly, the core material steel sheet S is pressed at the same time at each processing stage while being intermittently fed. In the processing stage for the first process I, both ends of the yoke part are punched out together with the protrusions and the recesses by the end punching dies 70 and 71, and at the same time, a pair of caulking parts are pressed into the yoke part. In the processing stage for the next step II, both sides of the magnetic pole teeth are punched out by the side punching dies 72 and 73. This is performed after the base 76 is moved by a necessary width by the movement of the corresponding unit movement width of the reciprocating drive mechanism prior to this. At the start of punching, the base 76 is set to the leftmost position in FIG. 17, and thereafter, the punching operation is started after sequentially moving to the right by the unit movement width. In the last processing stage for Step III, simultaneously with Steps I and II, the side on the back side of the yoke portion is punched by the edge punching die 74, and the tip of the magnetic pole tooth is punched by the tip punching die 75, respectively. In this processing stage, when the processing of the laminated core piece is further completed, the laminated core piece is processed by the pushing means at the same time.

  As described above, the laminating operation by the pushing means is performed by pushing the laminating core piece that has been punched into the laminating portion, which is a lower space, on the processing stage of Step III. If the previously processed laminated core piece is pushed into the laminated portion, the subsequent laminated core piece is pressed onto the laminated portion, and the pair of caulking portions formed in the yoke portion are fitted to each other. Therefore, it is fixed in a laminated state.

  By repeating the above steps, one set of laminated core pieces is sequentially punched and sequentially laminated and fixed, and the production of one divided skew laminated core is completed.

In the above, since the manufacturing process was performed using the mold as described above, the laminated core pieces 30 _-1 , 30 _-2 ... Shown in FIG. The split skew laminated core 30 shown in (1) can be manufactured easily and with high accuracy.

Thus, in the above, the process of manufacturing the divided skew laminated core 30 shown in FIG. 10 has been described. However, each die shown in FIG. If the laminated core piece for producing the inner cylindrical laminated core whose teeth are radially outward is changed to a punching die, the laminated core pieces 40 _-1 and 40 shown in FIG. _-2 ... Can be formed by punching, and these can be laminated to produce the divided skew laminated core 40 shown in FIG.

  These divided skew laminated cores can be easily manufactured as described above, and can be easily assembled into a laminated core as described above. It is also possible to easily perform winding work or mounting a coil winding coil on the magnetic pole teeth before assembling the laminated core, and it is easy to automate these work if necessary. These are the same as in the first embodiment.

(a), (b), (c) is the schematic top view which extracted and showed the typical part of the lamination | stacking core piece which comprises the division | segmentation skew lamination | stacking core for external cylindrical rotary electric machines of Example 1. FIG. The schematic perspective view of the division | segmentation skew laminated core of Example 1 comprised by laminating | stacking a laminated core piece. FIG. 2 is a schematic partial perspective view of laminated cores obtained by connecting the divided skew laminated cores of Example 1 (winding omitted). BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic plan view showing an annular skew laminated core for a rotating electrical machine in which a divided skew laminated core of Example 1 is assembled (winding omitted). FIG. 3 is a schematic plan view showing a process of assembling divided skew stacks into an annular skew stacked core after arranging them in a slightly large-diameter ring (winding omitted). (a), (b), (c) is the schematic plan view which extracted and showed the typical part of the lamination | stacking core piece which comprises the division | segmentation skew lamination | stacking core for internal cylindrical rotary electric machines of Example 1-2. The schematic perspective view of the division | segmentation skew laminated core of Example 1-2 comprised by laminating | stacking a laminated core piece. The schematic perspective view of the lamination | stacking core which connected 18 division | segmentation skew lamination | stacking cores of Example 1-2 (winding omitted). (a), (b), (c) is the schematic plan view which extracted and showed the typical part of the lamination | stacking core piece which comprises the division | segmentation skew lamination | stacking core for external cylindrical rotary electric machines of Example 2. FIG. The schematic perspective view of the division | segmentation skew laminated core of Example 2 comprised by laminating | stacking a laminated core piece. FIG. 6 is a schematic partial perspective view of laminated cores obtained by connecting divided skew laminated cores of Example 2 (winding omitted). FIG. 5 is a schematic plan view showing an annular skew laminated core for a rotating electrical machine in which the divided skew laminated core of Example 2 is assembled (winding omitted). (a), (b), (c) is the schematic plan view which extracted and showed the typical part of the lamination | stacking core piece which comprises the division | segmentation skew lamination | stacking core for internal cylindrical rotary electric machines of Example 2-2. The schematic perspective view of the division | segmentation skew laminated core of Example 2-2 comprised by laminating | stacking a laminated core piece. The schematic perspective view of the laminated core which connected 18 division | segmentation skew laminated cores of Example 2-2 (winding abbreviate | omitted). Plane explanatory drawing which shows the process of manufacturing the division | segmentation skew laminated core of Example 1, 1-2. Plane explanatory drawing which shows the process of manufacturing the division | segmentation skew laminated core of Example 2, 2-2.

Explanation of symbols

10 divided skew laminated core 10 ₋₁ , 10 ₋₂ ... Laminated core piece 10C laminated core 10E locking protrusion 10T magnetic pole tooth 10U inner side 10Y yoke portion 12H recessed portion 12P protrusion 14 wedge for fixing to back yoke 16 caulking Section 20 Divided Skew Laminated Core 20 _-1 , 20 _-2 ... Laminated Core Piece 20C Laminated Core 20E Locking Protrusion 20T Magnetic Teeth 20U Inner Side 20Y yoke part 30 Divided Skew Laminated Core 30 _-1 , 30 _-2 ... Laminated the core segment 30C laminated core 30E locking projection 30T magnetic pole teeth 30U inner side 30Y yoke portion 40 divisional skew laminated core 40 _-1, 40 _-2 ... laminated core segment 40C laminated core 40E locking projection 40T magnetic pole teeth 40U inner Side 40Y yoke portion 50, 52 end punching die 54, 56 side punching die 58 side punching die 60 tip punching die 62 base 64 pinion 66 sector gear 70, 71 end cutting die 72, 73 side cutting die 74 side cutting die 75 material tip cutting die C rotational center S laminated core

Claims (7)

A split skew laminated core constructed by laminating laminated core pieces,
For all the laminated core pieces, a partial arc-shaped yoke portion of the number of laminated layers having a size and shape corresponding to the cylindrical yoke portion of the laminated core divided by the number of magnetic pole teeth. , And projecting from the back side or the front side, the skew angle is divided by the number of stacked layers, and the magnetic pole teeth are projected at different angles by unit angles.
A split skew laminated core obtained by laminating all the laminated core pieces in such a manner that the projecting angle of the magnetic pole teeth sequentially changes from the skew start point to the end point by the unit angle.   2. The split skew laminated core according to claim 1, wherein a protruding direction of the magnetic pole teeth coincides with a direction extending in a radial direction from a center of the laminated core manufactured by combining the divided skew laminated cores formed by laminating the laminated core pieces.   Radial direction from the center of the laminated core produced by combining the divided skew laminated cores formed by laminating the laminated core pieces, with the protruding direction of the magnetic pole teeth positioned at the center of the skew angle or assumed to be located at the center. 2. The divided skew stack of claim 1, wherein the protruding direction of the other magnetic pole teeth is configured to be parallel to the protruding direction of the magnetic pole teeth that is assumed to be located at the center or the center of the skew angle. core. The core material steel plates are sequentially placed on multiple processing stages of the press machine,
Both ends of the yoke part, the back side of the yoke part, and the tip of the magnetic pole teeth, which are common to all the laminated core pieces, are punched by a machining stage having a fixed die among the plurality of machining stages. And
Both sides of the magnetic pole teeth at different positions for each laminated core piece are punched by being displaced by the displacement unit amount from the skew start point to the end point on a processing stage equipped with a movable mold that can be displaced by a predetermined displacement unit,
Next, a method of manufacturing a split skew laminated core by sequentially laminating processed laminated core pieces. The strip-shaped core material steel plate is sequentially passed by a predetermined width and passed while being placed on each processing stage of the press device,
In a part of each processing stage, at each corresponding portion of the strip-shaped core material steel plate, both ends of the yoke portion having a shape common to all laminated core pieces, sides on the back side of the yoke portion, and magnetic pole teeth The tip is punched with a fixed mold,
And in the other part of each processing stage, it is a movable type capable of displacing both sides of the magnetic pole teeth at different positions for each laminated core element by a predetermined displacement unit, and each displacement unit amount from the skew start point to the end point. Displaced and punched,
Next, a method of manufacturing a split skew laminated core by sequentially laminating processed laminated core pieces. The fixed mold is composed of an end punching die that punches both ends of the yoke part, a punching die that punches the side on the back side or the front side of the yoke part, and a tip punching die that punches the tip of the magnetic pole teeth. ,
The movable die is constituted by a side punching die that punches both sides of the magnetic pole teeth, and the side punching die is formed with the yoke portion of the laminated core piece being punched in the punching processing stage on both sides of the magnetic pole teeth. One piece with the angle obtained by dividing the skew angle by the number of stacked layers as a unit angle. It is configured so that it can be punched by displacing the unit core angle for each laminated core piece of
The end punching die is placed on the first stage of the processing stage, the base on which the side punching die is attached is placed on the next stage, and the edge punching die and the tip punching die are placed on the last stage. So that they work together,
While feeding the core material steel plate intermittently, at the same time, punching both ends of the yoke part at the first machining stage, punching both sides of the magnetic pole teeth at the next machining stage, and at the back or front of the yoke part at the last machining stage Punch out the edges of the edges and pole teeth,
At this time, the punching on both sides of the magnetic pole teeth rotates the base sequentially so that the projecting angle of the magnetic pole teeth of all the laminated core pieces changes from the skew start point to the end point by the unit angle. While doing
6. In the last processing stage, the punched laminated core pieces are pushed out to a stacking position below the processing stage, and the punched stacked core pieces are sequentially stacked at the stacking position. A method of manufacturing a split skew laminated core. The fixed mold is constituted by a both-end punching die that punches both ends of the yoke part, a punching die that punches the side on the back side or the front side of the yoke part, and a tip punching die that punches the tip of the magnetic pole tooth,
The movable die is constituted by a double-side punching die that punches both sides of the magnetic pole teeth, and the double-side punching die is at least its magnetic pole in relation to the laminated core piece in the punching process on the punching processing stage on both sides of the magnetic pole teeth. Attached to a base that can reciprocate in parallel with the feeding direction of the core material steel plate in the range of the tooth protruding portion, the base is laminated on the uppermost and lowermost parts corresponding to the skew angle for each laminated core piece. The interval obtained by dividing the gap interval of the magnetic pole teeth of the core piece by the number of laminated layers is taken as a unit interval, and the unit interval is moved in parallel with the feeding direction of the core material steel sheet for each laminated core piece. Configured to allow punching operation at that position,
Arrange the die with both ends on the first stage of the processing stage, arrange the base with the die on both sides on the next stage, and arrange the edge die and tip die on the last stage. , Make them work together,
While feeding the core material steel plate intermittently, at the same time, punching both ends of the yoke part at the first machining stage, punching both sides of the magnetic pole teeth at the next machining stage, and at the back or front of the yoke part at the last machining stage Punch out the edges of the edges and pole teeth,
At that time, the punching on both sides of the magnetic pole teeth is performed by moving the base sequentially so that the protruding positions of the magnetic pole teeth of all the laminated core pieces change from the skew start point to the end point by the unit interval. Done
6. In the last processing stage, the punched laminated core pieces are pushed out to a stacking position below the processing stage, and the punched stacked core pieces are sequentially stacked at the stacking position. A method of manufacturing a split skew laminated core.

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