JP6447365B2 - Iron core manufacturing equipment - Google Patents

Description

  The present invention relates to an iron core piece manufacturing apparatus for manufacturing iron core pieces for forming a split laminated iron core from a plate-like material.

Conventionally, in a rotating electrical machine, a divided laminated core is used in which arc-shaped core pieces, which are plates divided into a plurality of parts in the circumferential direction, are laminated along the axial direction while shifting the phase of joints in the circumferential direction ( For example, see Patent Document 1).
An iron core piece used for this divided laminated iron core is formed in a substantially T shape in plan view having an arc-shaped back yoke piece and a teeth piece having a base portion integrally provided on the back yoke piece.
Moreover, as an apparatus for manufacturing such an iron core piece, an iron core piece manufacturing apparatus for pressing a plate-like material made of an electromagnetic steel sheet with an upper die and a lower die is used. In the above prior art, the arrangement of the iron core pieces in the plate-like material is arranged alternately with the back yoke portions, thereby reducing the gap between the iron core pieces in the plate-like material, i.e., the area that becomes scrap, and improving the material yield. Can be planned.

JP 2010-213505 A

Conventionally, in order to further reduce the manufacturing cost, further improvement in material yield is desired.
However, if the interval between the iron core pieces is reduced in the arrangement of the iron core pieces in the plate-like material, the positioning accuracy of the plate-like member with respect to the manufacturing apparatus is deteriorated, resulting in the generation of defective products, thereby improving the yield. It was difficult.

  The present invention has been made paying attention to the above problems, and an object of the present invention is to provide an iron core piece manufacturing apparatus capable of improving the yield while ensuring the positioning accuracy of the plate-like member with respect to the manufacturing apparatus. .

In order to achieve the above object, the present invention provides:
An iron core piece manufacturing apparatus for forming an iron core piece used by laminating an annular laminated iron core in a divided laminated iron core divided in the circumferential direction by punching a plate-like material with a first die and a second die,
Each mold is formed so that the winding part forming piece of the iron core piece is punched in the width direction of the plate material, and positioning protrusions for positioning in the forward feeding direction when the plate material is punched The iron core piece manufacturing apparatus is characterized by being formed along the width direction at the upstream position and the downstream position of the punched portion of one type of winding part forming piece.

In the core piece manufacturing apparatus of the present invention, when the core piece of the plate-shaped material is punched, the positioning protrusions arranged along the width direction at the upstream position and the downstream position of the winding portion forming piece in one mold The plate-like material is positioned by inserting into the positioning hole of the plate-like material.
In this way, by positioning the positioning projections in the width direction of the plate-like material at the upstream position and the downstream position of the winding part forming piece, positioning in the progressive direction with higher accuracy than simply positioning the pin and the hole. It can be performed.
This makes it possible to suppress the occurrence of defective products due to misalignment, and to reduce the necessary area of the “sun” for sandwiching the plate-like material at the peripheral piece portion of the iron core plate cutting portion, thereby generating scrap. It becomes possible to suppress this, and the yield can be improved.

It is a front view which shows schematic structure of the rotary electric machine provided with the division | segmentation laminated | stacked iron core which uses the iron core piece manufactured with the iron core piece manufacturing apparatus of Embodiment 1. FIG. It is a perspective view which shows the said division | segmentation laminated | stacked iron core. It is a top view which shows the said iron core piece. It is a top view which shows the plate-shaped material which punches with the core piece manufacturing apparatus of Embodiment 1. FIG. FIG. 4 is an enlarged plan view illustrating a portion K4 in FIG. 3 in an enlarged manner. It is sectional drawing which shows the iron core piece manufacturing apparatus of Embodiment 1, Comprising: The cross section of the position along the S5-S5 line of FIG. 6 is shown. It is a top view which shows the principal part of the lower mold | type (die | dye) of the core piece manufacturing apparatus of Embodiment 1. FIG.

Hereinafter, the best mode for realizing the core piece manufacturing apparatus of the present invention will be described based on the embodiments shown in the drawings.
(Embodiment 1)
First, in describing the core piece manufacturing apparatus according to the first embodiment, [Configuration of rotating electric machine] [Configuration of core piece] [Plate cutting in plate-like material] [Configuration of core piece manufacturing apparatus] will be described in this order.

[Configuration of rotating electric machine]
A rotating electrical machine 100 including an iron core piece 400 (see FIG. 2B) manufactured by the iron core piece manufacturing apparatus A (see FIG. 5) according to the first embodiment is disposed inside a cylindrical motor case 10 as shown in FIG. The rotor 20 and the stator 30 are provided.

  The rotor 20 has a rotor core 21 and a rotating shaft 22. The rotor 20 is rotatably housed inside the motor case 10, and a permanent magnet 23 is embedded in the rotor core 21. The rotating shaft 22 is disposed so as to penetrate the central axis of the cylindrical rotor core 21. The permanent magnet 23 may be configured to be affixed to the surface of the rotor core 21.

The stator 30 includes a plurality of split cores (split laminated cores) 40, a coil 50 wound around the split core 40, and input terminals U, V, and W.
The plurality of split cores 40 are inside the motor case 10 and are connected in an annular shape so as to surround the rotor 20, thereby forming a stator core 30 a. Further, the coil 50 is wound around a tooth portion 42 (see FIG. 2A) described later of the split core 40.
The rotating electrical machine 100 configured as described above functions as a motor, a generator, or the like when the rotor 20 rotates with respect to the stator 30.

[Composition of iron core pieces]
Next, the structure of the iron core piece 400 which forms the division | segmentation core 40 is demonstrated.
FIG. 2A is a perspective view showing the split core 40, and FIG. 2B is a plan view showing an iron core piece 400 that forms the split core 40.

The split core 40 shown in FIG. 2A is formed by stacking the core pieces 400 shown in FIG. 2B in a direction along the axial direction of the rotating electrical machine 100 (arrow X direction).
2A, the split core 40 includes a back yoke portion 41 that forms an annular portion of the stator core 30a, and a teeth portion (winding portion) that is integrally provided with the base portion of the back yoke portion 41 and extends in the inner diameter direction. ) 42 and a substantially T-shape in plan view. Engaging convex portions 43 and 43 are formed at both ends in the circumferential direction at the tip of the tooth portion 42.

  Further, the back yoke portion 41 is opened at one end portion in the circumferential direction and extends in a direction along the axial direction, and a direction along the axial direction that protrudes in the circumferential direction from the other end portion in the circumferential direction. And a connecting convex portion 41b.

Therefore, when the split cores 40 are continuously arranged in the circumferential direction, the adjacent split cores 40 fit the connecting convex portions 41b of one split core 40 into the connecting concave grooves 41a of the other split core 40. An annular stator core 30a is formed by being coupled (engaged).
In this connected state, the teeth 42 of each divided core 40 protrude toward the center of the stator core 30a, that is, toward the rotor 20 side. When the coil 50 is wound around the tooth portion 42, the relative movement in the radial direction of the coil 50 causes the back yoke portion 41 and the engaging convex portions 43 and 43 that protrude in the circumferential direction with respect to the tooth portion 42. Regulated by

  As shown in FIG. 2B, the core piece 400 that forms the split core 40 is formed in a substantially T-shape, which is the same as the planar shape of the split core 40, using a thin electromagnetic steel plate. That is, the iron core piece 400 includes an arcuate back yoke forming piece 401 that forms the back yoke portion 41, and a tooth that is formed integrally with the back yoke forming piece 401 and extends in the inner diameter direction to form the tooth portion 42. Forming piece (winding part forming piece) 402.

Further, at both ends in the circumferential direction of the back yoke forming piece 401, a notch portion 401a for forming the connecting concave groove 41a and a convex piece portion 401b for forming the connecting convex portion 41b are formed.
Furthermore, the protrusion part 403 which forms the engagement convex part 43 is formed in the circumferential direction both ends edge part of the front-end | tip part of the teeth formation piece 402 so that it may protrude in the circumferential direction. Further, both side edges 402a and 402a of the teeth forming piece 402 are formed in a straight line.
When the core pieces 400 are stacked to form the split core 40, the core pieces 400 are integrally held by, for example, doweling or welding.

[Plate removal in plate materials]
Next, the plate-making in the plate-shaped material 200 when forming the core piece 400 from the plate-shaped material 200 will be described with reference to FIGS. 3 and 4.

The plate-like material 200 is a strip-like electromagnetic steel plate.
Then, the plate-like material 200 is punched non-continuously at a predetermined position by a core piece manufacturing apparatus A to be described later while forming the core piece 400 while feeding the plate-like material 200 in the forward feed direction indicated by the arrow F in FIG. . In FIG. 3, the iron core piece 400 formed by punching is displayed in black, and four iron core pieces 400 are simultaneously punched and formed as shown.

  Here, the punching of the iron core piece 400 is performed by the iron core piece upstream punching portion (second punching portion) P1 and the iron core piece downstream punching portion (first punching portion) P2.

  In the iron core piece downstream punching portion P2, the back yoke forming piece 401 of the iron core piece 400 is arranged along the edge in the width direction of the plate material 200, and the teeth forming piece 402 is directed to the other edge in the width direction. Then, the core piece 400 is formed along the width direction.

  In the iron core piece upstream punching portion P1, the back yoke forming piece 401 of the iron core piece 400 is arranged along the center in the width direction of the plate-like material 200, and the teeth forming pieces 402 are directed to both side edges in the width direction of the plate-like material 200. Are arranged to form the iron core piece 400.

  Further, in the iron core piece upstream punching portion P1 and the iron core piece downstream punching portion P2, the positions where the punching of the two iron core pieces 400 are respectively shifted in the forward feed direction by 1.5 feed pitches. . And in the iron core piece upstream punching part P1 and the iron core piece downstream punching part P2, the positions where the punching is performed are arranged shifted by 3.5 feed pitches in the progressive direction.

Therefore, in the plate-like material 200, the iron core plate removing portion 220 for punching one iron core piece 400 includes the edge side rows 211 and 211 for punching at the iron core piece downstream punching portion P2, and the iron core piece upstream punching portion P1. Four rows of punching center side rows 212 and 212 are arranged.
In addition, as shown in an enlarged view in FIG. 4, the iron core plate removing part 220 forms a back yoke plate removing part 221 that forms the back yoke forming piece 401 and a tooth forming piece 402 according to the shape of the iron core piece 400. The teeth cutting portion 222 forms a substantially T-shape.

  Further, the tooth planing portions 222 of the iron core planking portions 220 in the edge side rows 211 and the tooth planing portions 222 of the core core planing portions 220 in the center side rows 212 are alternately arranged. That is, the tooth cutting part 222 in the center side row 212 is disposed between the tooth cutting parts 222 and 222 in the edge side row 211. On the other hand, the tooth cutting part 222 in the edge side row 211 is disposed between the tooth cutting parts 222 and 222 in the central side row 212.

Further, the two edge-side rows 211 are arranged by shifting the position in the forward feed direction by 0.5 feed pitch, and the two middle-side rows 212 are also placed in the forward feed direction by 0.5 feed pitch. The positions are shifted.
In other words, in FIG. 3, the iron core plate removing portions 220 of the upper edge side row 211 and the iron core plate removing portions 220 of the lower center side row 212 are arranged at the same pitch in the progressive direction. Similarly, the iron core plate removing portions 220 in the lower edge side row 211 and the iron core plate removing portions 220 in the upper center side row 212 are arranged at the same pitch in the progressive direction.

[Configuration of iron core piece manufacturing equipment]
Next, the structure of the core piece manufacturing apparatus A of Embodiment 1 which forms the core piece 400 by punching out the plate-like material 200 described above will be described.

The core piece manufacturing apparatus A according to the present embodiment is an apparatus that forms the core piece 400 by punching out the plate-like material 200 with the press device 600 while sequentially feeding the plate-like material 200 with the feeding device 500 shown in FIG. In addition, the plate-shaped material 200 is a strip-shaped steel plate drawn out from a steel plate wound in a roll form.
The press device 600 includes an upper die (punch) 610 and a lower die (die) 620. The plate material 200 is disposed between the two dies 610 and 620, and the upper die 610 is lowered toward the lower die 620. It is a known device that punches out.

  Therefore, the feeding device 500 sequentially feeds the plate-shaped material 200 in the direction of the arrow F with the interval between adjacent iron core plate removing portions 220 shown in FIG. 4 as one feeding pitch. Then, for each one-pitch feeding operation, the press device 600 punches the plate-like material 200 to form four iron core pieces 400 at the same time.

  Furthermore, in addition to the pressing device 600, the core piece manufacturing apparatus A includes a step of punching the plate-like material 200 to form the pilot holes 231, a step of forming the first nest holes 241, and a step of forming the second nest holes 242. Are provided with press devices (not shown).

  That is, as shown in FIG. 3, the step of drilling the pilot hole 231 is performed on the plate-shaped material 200 at the pilot hole punching portion PiP that is the most upstream in the progressive direction (the direction of the arrow F). Then, by punching the pilot hole 231, a circular first scrap 301 is generated. 3 and 4, members that are cut off from the plate-like material 200 by punching are displayed in black in the drawings. The interval between the pilot holes 231 in the progressive direction is a single feed pitch (Pi) when the plate-like material 200 is fed in sequence.

  Further, as is well known, the pilot hole 231 positions the plate-like material 200 with respect to the press device 600 by inserting a pilot pin 611 (see FIG. 5) of the press device 600.

  Further, a process of punching the first nest hole 241 is performed at the first nest hole punching part NP1 downstream of the pilot hole punching part PiP. The first nest hole 241 receives a first nest 621 (see FIGS. 5 and 6) that protrudes from a lower mold 620 (described later) toward the upper mold 610, thereby allowing the plate-like material 200 to move during pressing. The iron core plate removing part 220 is positioned by regulation.

In addition, the pair of first nest holes 241 and 241 arranged at intervals in the progressive direction are formed in the width direction along the positions where both side edges 402a and 402a of the teeth forming piece 402 of the iron core piece 400 are punched out. (In the direction of arrow W). That is, as shown in FIG. 4, the first nest hole 241 is formed between the tooth cutting portion 222 of the edge side row 211 and the tooth cutting portion 222 of the central side row 212 that are adjacent in the forward feeding direction.
Further, the first nest holes 241 are arranged at both ends in the width direction along the portions where the protrusions 403 are punched.
In FIG. 3, the second scrap 302 shown in black is a scrap generated by forming the first nest hole 241.

  Furthermore, a process of punching the second nest hole 242 is performed in the second nest hole punching part NP2 downstream of the first nest hole punching part NP1. The second nest hole 242 is arranged along a portion where the tip edge 402b (see FIG. 2B) of the teeth forming piece 402 of the iron core piece 400 is punched.

  And the 2nd nest hole 242 is simultaneously formed in the location which punches the front-end edge 402b (refer FIG. 2B) of each teeth formation piece 402 in each row | line 211, 211, 212, 212. FIG. In the drawing, the third scrap 303 shown in black is a scrap generated by forming the second nest hole 242.

  Accordingly, when the plate material 200 has been punched out of the second nest hole 242, as shown in FIGS. 3 and 4, the first nest hole 241 extending in the width direction and the second nest extending in the forward feeding direction are used. The holes 242 form discontinuous uneven holes.

  As shown in FIG. 3, the pressing device 600 has a relatively upstream core piece upstream punching portion P1 and a relatively downstream core piece downstream punching portion P2 downstream of the second nest hole punching portion NP2. At the same time, two core pieces 400 and 400 are punched out.

In the core piece upstream punching portion P1, the core piece 400 is punched into the core plate removing portions 220 of the respective central side rows 212 and 212 of the plate-like material 200.
On the other hand, in the core piece downstream punching part P <b> 2, the core piece 400 is punched with respect to the iron core plate removing part 220 of each edge side row 211, 211 of the plate-like material 200.
In addition, in each press position P1, P2, what is indicated by black is the core pieces 400, 400 formed by punching.

  Here, in the iron core piece upstream punching portion P1, the positioning of the plate-shaped material 200 at the time of punching is performed by the first nest 621 and the second nest 622 as positioning protrusions in addition to the positioning by the pilot pin 611 and the pilot hole 231. Perform positioning.

  The pair of first nests 621 and 621 is formed on a lower die cutting edge that punches out both side edges 402a and 402a in the forward feeding direction of the teeth forming piece 402 of one iron core piece 400. The first nest 621 is inserted into the first nest hole 241 to position the plate-like material 200 in the progressive direction and the width direction. In this case, since the first nest 621 extends in the width direction, the first nest 621 particularly has high accuracy for positioning in the progressive direction.

  Further, the pair of second nests 622 and 622 are formed on a lower cutting edge that punches out the leading edge 402 b of the teeth forming piece 402 of one iron core piece 400. The second nest 622 is inserted into the second nest hole 242 to position the plate-like material in the progressive direction and the width direction. In this case, since the second nest 622 extends in the progressive direction, the second nest 622 has high accuracy particularly for positioning in the width direction.

  Then, the core piece 400 is formed by punching in the core piece upstream punching portion P1, and after punching the core piece 400, the core piece punching hole 234 is formed in the core plate removing portion 220. Note that, at the time of punching at the core piece upstream punching portion P1, only the core piece 400 is separated from the plate material 200, and no scrap is generated.

  Further, the core piece downstream punched portion P2 is formed between the core piece punched hole 234 formed this time at the core piece upstream punched portion P1 and the previously formed core piece punched hole 234 adjacent thereto. A teeth forming piece 402 of the iron core piece 400 is formed.

  Next, in the iron core piece downstream punching portion P2, the plate-shaped material 200 is positioned by the third nest 623 as a positioning projection in addition to the positioning by the pilot pin 611 and the pilot hole 231.

In this case, as shown in FIG. 3, the third nest 623 is inserted into an iron core piece punching hole 234 formed by punching the iron core piece 400 at the iron core piece upstream punching portion P1.
As shown in FIG. 6, the third nest 623 has a planar shape along the side edge 402 a, the protrusion 403, and the tip edge 402 b of the teeth forming piece 402 of the iron core piece 400, in the width direction and the forward feeding direction. Is formed in a substantially L shape.

  Therefore, when the third nest 623 is inserted into the core piece punching hole 234 as shown in FIG. 3 when the core piece 400 is punched in the core piece downstream punching portion P2, both side edges 402a, 402a of the teeth forming piece 402 are inserted. As well as the tip edge 402b. Thereby, positioning of the plate-shaped material 200 can be performed with high accuracy.

  Furthermore, in this way, in the core piece downstream punching portion P2, the plate-shaped material 200 is positioned with high accuracy by the third nest 623 on the center side in the width direction of the plate-shaped material 200 in addition to the pilot hole 231. For this reason, positioning is possible without providing pilot holes at the widthwise edge of the plate-like material 200, and it is not necessary to set an edge “sun” for forming the pilot hole at the widthwise edge. Therefore, it is possible to secure the region of the core core cutting portion 220 for forming the core piece 400 in the plate-like material 200 up to the edge of the edge of the plate-like material 200 in the width direction.

  Therefore, the areas of the edge-side scraps 304 and 304 and the center-side scrap 305 shown in FIG. 3 which are generated after the punching at the iron core piece downstream punching portion P2 can be suppressed to be small. In particular, the area of the edge-side scrap 304 formed at the edge of the plate-like material 200 can be kept extremely small.

(Operation of Embodiment 1)
Next, the operation of the first embodiment will be described.
When the iron core piece 400 is manufactured, as shown in FIG. 5, the plate-shaped material 200 is fed between the upper die 610 and the lower die 620 of the press device 600 by the feeding device 500. To move forward. The feed pitch (Pi) corresponds to the interval between the iron core plate removing portions 220 in each of the rows 211 and 212 shown in FIG.

Then, a pilot hole 231 punching process is executed in the pilot hole punching portion PiP relatively upstream in the progressive direction (the direction of arrow F) with respect to the plate-like material 200. As shown in FIG. 4, the punched positions of the pilot holes 231 in the plate-like material 200 are in the progressive direction center of the tip edge of each tooth planing portion 222 and both ends in the forward direction of each back yoke planing portion 221. It is the position surrounded by the border of the edge.
Further, by punching the pilot hole 231, a circular first scrap 301 shown in FIG. 3 is generated.

Next, in the first nest hole punching part NP1 downstream of the pilot hole punching part PiP, the first nest hole 241 punching process is executed. In addition, the punching position of the first nest hole 241 in the plate-like material 200 is a position sandwiched between the teeth cutting portion 222 of the edge side row 211 and the teeth cutting portion 222 of the central side row 212 in the progressive direction. .
Further, by punching out the first nest hole 241, a second scrap 302 having a substantially parallelogram shape is generated.

Next, in the second nest hole punching part NP2 downstream of the first nest hole punching part NP1, a punching process of the second nest hole 242 is further executed. In addition, the punching position of the second nest hole 242 in the plate-like material 200 is a position along the tip edge 402b of each tooth cutting portion 222 in each row 211, 212 of the plate-like material 200.
Further, by punching out the second nest hole 242, a third scrap 303 having a substantially blade cross-sectional shape is generated.

  When the punching process of the second nest hole 242 is completed, the first nest hole 241 and the second nest hole 242 are disposed in the plate-like material 200 in a discontinuous uneven shape.

  Next, the punching process of the iron core piece 400 is executed by the press device 600. In this case, two core pieces 400 are punched at the core piece upstream punching portion P1 and the core piece downstream punching portion P2, respectively.

  In the core piece upstream punching portion P1, as shown in FIG. 3, the center side rows 212 and 212 of the plate-like material 200 are punched into the core plate removing portion 220. Further, in the iron core piece downstream punching portion P2, punching is performed on the iron core plate removing portion 220 of the edge side rows 211 and 211 of the plate-like material 200.

  In the punching of the iron core piece 400, when punching at the iron core piece upstream punching portion P1, in addition to the positioning by the pilot hole 231 and the pilot pin 611 (see FIG. 5), the first nest 621 formed in the lower die 620 is used. Positioning by the second nest 622 is performed.

  That is, at the time of this punching, the first nest 621 is inserted into the first nest hole 241 and the second nest 622 is inserted into the second nest hole 242 so that the width direction of the plate-like material 200 and A position in the forward direction is defined. In particular, as described above, since the first nest 621 extends in the width direction along the side edges 402a and 402a in the forward direction of the teeth forming piece 402, the position in the forward direction is defined with high accuracy. Further, the second nest 622 extends in the progressive direction along the tip edge 402b of the teeth forming piece 402, thereby defining the position in the width direction with high accuracy.

  Therefore, the plate-shaped material 200 can be positioned with higher accuracy than simply positioning with the pilot hole 231 and the pilot pin 611. In addition, the positioning accuracy is further improved as compared with the positioning performed by only one of the first nest 621 and the second nest 622.

Further, in the core piece downstream punching portion P2, the positioning of the plate-shaped material 200 when punching the core piece 400 is performed in addition to the positioning by the pilot hole 231 and the pilot pin 611 (see FIG. 5), and the first formed on the lower die 620. This is done by three nests 623.
That is, in the core piece downstream punching portion P2, a pair of third nests 623 and 623 are inserted into the core piece punching hole 234 formed upstream of the single core piece 400, thereby forming a plate shape. The material 200 is positioned.

  The third nest 623 is formed in a substantially L shape in plan view, and extends in the width direction along both side edges 402a and 402a in the forward feeding direction of the teeth forming piece 402 of the iron core piece 400. The teeth forming piece 402 extends in the progressive direction along the leading edge 402b. The pair of third nests 623 and 623 are arranged so as to sandwich the teeth forming piece 402 from both sides in the forward feeding direction. Therefore, even in the third nest 623, the positioning in the progressive direction and the width direction can be performed with high accuracy with respect to the plate-like material 200.

  Therefore, even if it exists in the iron core piece downstream punching part P2, since the plate-shaped material 200 prescribes | regulates the position of a forward feed direction and the width direction orthogonal to this, when prescribing the position of any one direction Compared with, positioning with higher accuracy can be performed.

  And, since the positioning accuracy is improved by the first to third nests 621 to 623 in this way, at the time of punching, the plate-like material 200 is abolished on the “sun” pilot holes 231 that are both side edges in the width direction, It is not necessary to secure "Sun". For this reason, the area of each scrap 304,305 produced after punching of the iron core piece 400 can be suppressed, and the yield of the material can be improved.

(Effect of Embodiment 1)
Below, the effect of the iron core piece manufacturing apparatus A of Embodiment 1 is enumerated.
1) The core piece manufacturing apparatus A of Embodiment 1 is
An iron core piece 400 used by laminating a stator core 30a as an annular laminated iron core on a divided core 40 as a divided laminated iron core divided in the circumferential direction is used as an upper die 610 as a first die and a second die. An iron core piece manufacturing apparatus for punching and forming the plate-like material 200 with a lower mold 620,
The tooth forming piece 402 of the iron core piece 400 that forms the tooth part 42 as a winding part extending in the radial direction from the back yoke part 41 of the split core 40 is a width direction orthogonal to the progressive direction of the plate-like material 200. The molds 610 and 620 are formed so as to be punched toward the center, and are inserted into the first nest holes 241 as positioning holes formed in the plate-like material 200 so that the plate-like material 200 is positioned in the progressive direction at the time of punching. The first nest 621 as the positioning projection to be performed is formed along the width direction at the upstream position and the downstream position in the progressive direction of the punched portion of the teeth forming piece 402 of the lower mold 620 which is one of both molds. Features.
Therefore, the positioning accuracy of the plate-like material 200 in the progressive direction is improved, and the occurrence of defective products can be suppressed. In addition, it is possible to reduce the “rim sun” and “feed sun”, which are edge portions to be secured around the core piece 400, and to suppress the amount of scrap.
Therefore, the material yield can be improved while ensuring the positioning accuracy.

2) The core piece manufacturing apparatus A of Embodiment 1 is
A second nest 622 serving as a second positioning protrusion is inserted into the lower mold 620 and inserted into a second nest hole 242 serving as a second positioning hole formed in the plate-shaped material 200. It was formed along the direction.
Therefore, the positioning accuracy in the width direction of the plate-like material 200 is improved, and generation of defective products can be further suppressed. In addition, it is possible to further reduce the “rim sun” and “feed sun”, which are edge portions to be secured around the iron core piece 400, and further reduce the amount of scrap.
Therefore, the material yield can be improved while ensuring the positioning accuracy.

3) The core piece manufacturing apparatus A of Embodiment 1 is
The lower mold 620 is a die, and the first nest 621 and the second nest 622 are set on the cutting edge of the die.
Therefore, the positioning performance is further stabilized, and it is possible to further reduce the defective rate such as displacement pressing, and it is possible to suppress the generation of scrap.

4) The core piece manufacturing apparatus A of Embodiment 1 is
A pilot hole punching portion PiP for forming a pilot hole 231 in the plate-like material 200 is provided upstream of the first nest hole punching portion NP1 and the second nest hole punching portion NP2 where the nest holes 241 and 242 are punched. It is characterized by.
Therefore, the positioning accuracy of the plate-shaped material 200 is ensured when the nest holes 241 and 242 are punched, and thereby the positioning accuracy using the nest holes 241 and 242 can be improved.

5) The core piece manufacturing apparatus A of Embodiment 1 is
Both molds 610 and 620 are
The back yoke forming piece 401 of the iron core piece 400 that forms the back yoke portion 41 of the split core 40 is disposed along one edge in the width direction of the plate-like material 200, and the teeth forming piece 402 is arranged in the other width direction. An iron core piece downstream punching portion P2 as a first punching portion that is arranged along the width direction toward the edge of the core to form the iron core piece 400;
The teeth forming piece 402 is disposed between the tooth cutting portions 222, which are portions where the tooth forming piece 402 of the iron core piece 400 is formed by the iron piece downstream punching portion P2, and the other edge portion of the teeth forming piece 402 is disposed. An iron core piece upstream punching portion P1 as a second punching portion on which the back yoke forming piece 401 is arranged extending in the progressive direction on the side,
It is characterized by having.
Therefore, each iron core planing part 220 can be efficiently arranged in the plate-like material 200, the generation of scrap can be suppressed, and the material yield can be improved.

6) The core piece manufacturing apparatus A of Embodiment 1 is
The core piece downstream punched portions P2 are arranged at both edges in the width direction of the plate-shaped material 200, and the iron core piece upstream punched portions P1 are formed so that the back yoke forming piece 401 is sandwiched across the center in the width direction. It is arranged.
Therefore, it is possible to alternately arrange the punching iron core plate removing portions 220 by the iron core piece downstream punching portion P2 and the punching iron core plate cutting portions 220 by the iron core piece upstream punching portion P1. Thereby, the efficient arrangement | positioning of the iron core board part 220 is attained, and a material yield can be improved.

7) The core piece manufacturing apparatus A of Embodiment 1 is
The core piece downstream punched portion P2 is arranged downstream of the core piece upstream punched portion P1 in the progressive direction,
The third nest 623 serving as a positioning protrusion of the core piece downstream punched portion P2 is characterized in that the core piece punched hole 234 generated by punching of the core piece 400 in the iron core piece upstream punched portion P1 is inserted as a positioning hole.
In the core piece downstream punched portion P2 in which the back yoke forming piece 401 is arranged at the edge of the plate-shaped material 200 to form the core piece 400, the core piece punched hole generated by punching the core piece 400 in the core piece upstream punched portion P1. 234 is used as a positioning hole.
Therefore, in the iron core piece downstream punched portion P2, it is possible to secure a larger contact area with the third nest 623 and improve the positioning accuracy, and it is possible to improve the material yield than providing a separate positioning hole.

8) The core piece manufacturing apparatus A of Embodiment 1 is
The second nest 622 is characterized by being arranged along a portion where the tip edge of the teeth forming piece 402 is punched out.
Therefore, positioning accuracy by the second nest 622 can be ensured while suppressing generation of scrap.

  As mentioned above, although the iron core piece manufacturing apparatus of this invention has been demonstrated based on embodiment, about a specific structure, it is not restricted to this embodiment, The invention which concerns on each claim of a claim Design changes and additions are allowed without departing from the gist.

In Embodiment 1, the example which has arrange | positioned the 1st nest as a 1st positioning protrusion along the edge part which forms the teeth formation piece as a coil | winding part formation piece was shown. However, the present invention is not limited to this, and the first positioning protrusions are portions that form the winding portion forming piece as long as they are formed along the width direction on the upstream side and the downstream side of the winding portion forming piece. You may arrange | position away from.
Further, the second nest as the second positioning protrusion may also be arranged away from the tip edge of the teeth forming piece as the winding part forming piece. Furthermore, although the second nest as the second positioning protrusion is arranged along the tip edge of the teeth forming piece as the winding portion, the second nest extends in the progressive direction along the back yoke forming piece. It can also be provided.

  Further, in the embodiment, the die is the lower die, but the upper die may be the die and the positioning protrusion may be disposed on the upper die.

Further, in the embodiment, an example in which two rows of the edge side row and the center side row are provided has been described. However, a similar arrangement may be provided in which two or more rows are provided.
Further, the upstream / downstream arrangement of the first punched portion and the second punched portion is not limited to the arrangement shown in the embodiment, and may be an arrangement opposite to the embodiment. Further, the arrangement of the positions where the core pieces are punched in the punched portions is not limited to the arrangement shown in the embodiment, and may be approached or separated in the forward feed direction.

A Iron core piece manufacturing apparatus P1 Iron core piece upstream punching part (second punching part)
P2 Core core downstream punching part (first punching part)
PiP Pilot hole punching part 30a Stator core (laminated core)
40 split core (split laminated core)
41 Back yoke portion 42 Teeth portion 200 Plate material 220 Iron core plate removing portion 231 Pilot hole 234 Iron core single punching hole (positioning hole)
241 First nest hole (positioning hole)
242 Second nest hole (positioning hole)
400 Iron core piece 401 Back yoke forming piece 402 Teeth forming piece 600 Press device 610 Upper die 611 Pilot pin 620 Lower die 621 First nest (positioning protrusion)
622 2nd nest (positioning protrusion)
623 3rd nest (positioning protrusion)

Claims (8)

An iron core piece manufacturing apparatus for forming an iron core piece used by laminating an annular laminated iron core in a divided laminated iron core divided in the circumferential direction by punching a plate-like material with a first die and a second die,
A winding part forming piece of the iron core piece that forms a winding part extending in the radial direction from the back yoke part of the divided laminated iron core is punched in a width direction that is orthogonal to the progressive direction of the plate-like material. The positioning projections for positioning in the progressive direction at the time of punching the plate-like material are inserted into the positioning holes formed in the plate-like material as shown in FIG. An iron core piece manufacturing apparatus, wherein the punched portion of the winding part forming piece is formed along the width direction at an upstream position and a downstream position in the progressive direction. In the iron core piece manufacturing apparatus according to claim 1,
In the one mold, a second positioning projection for positioning in the width direction by being inserted into a second positioning hole formed in the plate material is formed along the progressive direction. Iron core piece manufacturing equipment. In the iron core piece manufacturing apparatus according to claim 1 or 2,
The one mold is a die of a die and a punch, and the positioning protrusion is set on a cutting edge of the die. In the iron core piece manufacturing apparatus according to any one of claims 1 to 3,
An iron core piece manufacturing apparatus comprising a punching portion for forming a pilot hole in the plate-like material upstream of a location where the positioning hole is punched. In the iron core piece manufacturing apparatus according to any one of claims 1 to 4,
Both types are
The back yoke forming piece of the iron core piece forming the back yoke part of the divided laminated iron core is disposed along one edge in the width direction of the plate-like material, and the winding part forming piece is arranged in the width direction. A first punched portion that is disposed along the width direction toward the other edge portion to form the iron core piece;
The winding portion forming piece is disposed between the portions of the iron core piece where the winding portion forming piece is formed by the first punched portion, and on the other edge side of the winding portion forming piece. A second punching portion that extends and arranges the back yoke forming piece in the progressive direction;
An iron core piece manufacturing apparatus comprising: In the iron core piece manufacturing apparatus according to claim 5,
The first punched portion is disposed on both edges in the width direction of the plate-like material, and the back punch forming piece is formed with the back yoke forming piece sandwiched in the center in the width direction. An iron core piece manufacturing apparatus characterized by being arranged as described above. In the iron core piece manufacturing apparatus according to claim 6,
The first punched portion is disposed downstream of the second punched portion in the progressive direction;
The core piece manufacturing apparatus, wherein the positioning protrusion of the first punched portion inserts a punched hole formed by punching the core piece at the second punched portion as the positioning hole. In the iron core piece manufacturing apparatus according to any one of claims 5 to 7,
The iron piece manufacturing apparatus according to claim 2, wherein the second positioning protrusion is disposed along a portion where a tip edge of the winding portion forming piece is punched out.