JP2009273202A - Method and apparatus for manufacturing laminated core, and laminated core - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and apparatus for manufacturing a laminated core with high productivity, and to provide a laminated core. <P>SOLUTION: A laminated core 1 where a plurality of annular iron core members 3 consisting of a plurality of iron core members 2 arranged annularly are laminated and fixed is manufactured while punching the iron core members 2 from a plate W which is conveyed in one direction and processed. In the manufacturing method, the iron core members 2 are punched sequentially from the plate W being processed such that the arc angle of at least one of the plurality of ion core members 2 constituting the same annular iron core member 3 is differentiated from the arc angle of other ion core member 2 constituting the same annular iron core member 3. Furthermore, the punched ion core members 2 are laminated while being arranged annularly and sequentially on a cradle 35 which carries out fixed rotation whenever the ion core member 2 is punched. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method and apparatus for manufacturing a laminated core in which a plurality of core pieces are caulked and joined, and a laminated core.

2. Description of the Related Art Conventionally, a laminated iron core is used in which arc-shaped iron core pieces, which are plates divided into a plurality of parts in the circumferential direction, are so-called bricks while shifting the phase of joints in the circumferential direction (for example, Patent Document 1). reference). In the iron core of Patent Document 1, arc-shaped iron core pieces are fixed to each other by fitting a key into a key groove formed to extend in the laminating direction on the outer periphery of the laminated iron core.
Hei 3-155346

  However, the laminated iron core disclosed in Patent Document 1 has a low productivity because it is necessary to stack the keys while fitting the keys while shifting the phase of the joints in the circumferential direction.

  The present invention has been made to solve the above-described problems associated with the prior art, and an object thereof is to provide a method and apparatus for manufacturing a laminated core with high productivity, and a laminated core.

  The method for manufacturing a laminated core according to the present invention that achieves the above object includes a laminated iron core, in which a plurality of annular core pieces made of a plurality of annularly arranged iron core pieces are laminated and fixed, from a work plate conveyed in one direction. It is a manufacturing method of the laminated iron core manufactured while punching an iron core piece. In the manufacturing method, the at least one arc angle of the plurality of iron core pieces constituting the same annular core piece is different from the arc angle of the other iron core pieces constituting the same annular core piece from the processed plate. Punching iron core pieces sequentially. Further, the punched iron core pieces are stacked while being sequentially arranged in a ring shape on a cradle that rotates constantly every time the iron core pieces are punched.

  An apparatus for manufacturing a laminated core according to the present invention that achieves the above object includes a laminated iron core, in which a plurality of annular core pieces made of a plurality of annularly arranged iron core pieces are laminated and fixed, from a work plate that is conveyed in one direction. It is a manufacturing apparatus of the laminated iron core manufactured while punching an iron core piece. In the apparatus, the core is separated from the processed plate so that at least one arc angle of a plurality of core pieces constituting the same annular core piece is different from the arc angle of other core pieces constituting the same annular core piece. It has an iron core piece punching part which punches a piece sequentially. Furthermore, the apparatus has a cradle that rotates by a fixed rotation angle each time the core pieces are punched and on which the core pieces punched by the core piece punched portions are sequentially arranged in an annular shape.

  The laminated iron core according to the present invention that achieves the above object includes a laminated iron core comprising a plurality of annular iron core pieces arranged in a ring and fixed to the laminated iron core from a work plate conveyed in one direction. It is a laminated iron core manufactured while punching. The laminated cores are different from each other in that at least one arc angle of a plurality of core pieces constituting the same annular core piece is different from arc angles of other core pieces constituting the same annular core piece. They are arranged so as to be shifted in the circumferential direction.

  In the method of manufacturing a laminated core according to the present invention configured as described above, at least one arc angle of a plurality of core pieces constituting the same annular core piece is different from other core pieces, and the rotation angle of the cradle Therefore, when the core pieces are stacked on the cradle, the overlapping core pieces are shifted and stacked. Therefore, the phase of the seam in the circumferential direction can be easily shifted, and the productivity is excellent.

  The manufacturing apparatus for a laminated core according to the present invention configured as described above includes a core piece punching unit that punches out at least one arc angle of a plurality of core pieces constituting the same annular core piece from other core pieces. Then, since the cradle that rotates at a certain rotation angle is provided, when the core pieces are stacked on the cradle, the overlapping core pieces are shifted and stacked. Therefore, the phase of the seam in the circumferential direction can be easily shifted, and the productivity is excellent.

  In the laminated core according to the present invention configured as described above, at least one arc angle of a plurality of iron core pieces constituting the same annular core piece is different from the arc angle of other iron core pieces and overlaps each other in the stacking direction. Since the core pieces are arranged so as to be shifted in the circumferential direction, they can be manufactured by easily shifting the phase of the joints in the circumferential direction, and the productivity is excellent.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

<First Embodiment>
1 is a plan view showing a laminated iron core manufactured by the laminated iron core manufacturing apparatus according to the first embodiment of the present invention, FIG. 2 is a side view showing the laminated iron core, and FIG. It is sectional drawing of the single layer in alignment with line III.

  The laminated core 1 in the first embodiment is a laminated rotor core used on the rotor side of the electric motor, and is a constituent element of a magnet-equipped annular rotor having 16 magnet mounting holes 4. As shown in FIGS. 1 and 2, the laminated core 1 is formed by laminating a plurality of annular core pieces 3 in which arc-shaped core pieces 2 a and 2 b (core pieces) divided into five are arranged in a ring shape.

  Four arc-shaped iron core pieces 2b of the arc-shaped iron core pieces 2 (hereinafter, 2a and 2b are collectively referred to as 2) are formed with three magnet mounting holes 4 arranged in the circumferential direction, and one circle Four magnet mounting holes 4 arranged in the circumferential direction are formed in the arc-shaped core piece 2a.

  That is, the laminated core 1 includes i (= 4) arcuate core pieces 2b including n (= 3) magnet mounting holes 4 and one sheet including (n + 1) magnet mounting holes 4. An annular core piece 3 formed by arranging arc-shaped core pieces 2a is laminated and formed with m (= 16) magnet mounting holes 4 set by the following equation.

m = i × n + (n + 1) (1)
In the vicinity of each magnet mounting hole 4, one pilot hole 5 (pilot part) and two crimping parts 6 are formed. Therefore, the arc-shaped iron core piece 2b having the three magnet mounting holes 4 has three pilot holes 5 and six caulking portions 6 formed therein, and the arc-shaped iron core piece 2a having the four magnet mounting holes 4 has Four pilot holes 5 and eight caulking portions 6 are formed. As shown in FIG. 3, the crimping portion 6 is formed by being half-cut to one side, the crimping projection 7 is formed on one side, and the crimping recess 8 is formed on the other side. Here, the half punching means that the crimping convex portion 7 and the crimping concave portion 8 are formed by incomplete punching, and may not penetrate the front and back as shown in FIG. 3 or may partially penetrate. .

  The magnet mounting hole 4, the pilot hole 5, and the two caulking portions 6 are arranged every 22.5 (= 360 / m) degrees when the circular core pieces 3 are configured by arranging the circular core pieces 2 in a ring shape. Yes.

  On the outer periphery of each arc-shaped core piece 2, a notch 9 is formed between the magnet mounting holes 4 to form a barrier area and play a role of adjusting the magnetic flux.

  The annular core pieces 3 that are overlapped with each other are formed by stacking a predetermined number of so-called bricks in which the joints 10 between the circular arc-shaped core pieces 2 in the circumferential direction are shifted in the circumferential direction. In this embodiment, the phase is 22.5 degrees. They are stacked with a shift α.

  When the annular core pieces 3 are stacked with a phase shift α of 22.5 degrees, as described above, the magnet mounting hole 4, the pilot hole 5, and the two crimping portions 6 are arranged every 22.5 degrees. Therefore, the respective positions of the magnet mounting hole 4, the pilot hole 5, and the crimping portion 6 coincide with the stacking direction. Therefore, the magnet mounting hole 4 and the pilot hole 5 penetrate from the one side of the annular core piece 3 to the other side, and the caulking portion 6 is connected to the caulking concave portion 8 that is overlapped with the caulking convex portion 7.

  In addition, in the arc-shaped core piece 2 constituting the outermost annular core piece 3 in the stacking direction, it is preferable that the through hole 11 is formed instead of the crimped portion 6 so that the crimped portion 6 does not protrude outward.

  Next, the laminated iron core manufacturing apparatus 20 according to the first embodiment will be described.

  4 is a plan view showing the laminated core manufacturing apparatus according to the first embodiment, FIG. 5 is a cross-sectional view taken along line VV in FIG. 4, and FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. FIG.

  The laminated core manufacturing apparatus 20 according to the present embodiment is an apparatus that punches the arc-shaped core pieces 2 discontinuously while sequentially feeding the workpieces W, and sequentially arranges and stacks the punched arc-shaped core pieces 2. Here, discontinuous means that the plurality of arc-shaped core pieces 2 sequentially punched are not connected, that is, the material is removed from the work plate W at a predetermined interval.

  The to-be-processed board W is a strip | belt-shaped steel plate pulled out from the steel plate wound by the roll form. From the work plate W, the arc-shaped core pieces 2 are taken in a line. As for the position where the material of the arc-shaped core piece 2 on the workpiece plate W is taken, the circumferential ends of the arc-shaped core piece 2 to be punched are positioned on both edge sides of the workpiece plate W.

  As shown in FIGS. 4 and 5, the manufacturing apparatus 20 includes a progressive mold apparatus, and a plurality of stations S <b> 1 to S <b> 7 that perform different processes are arranged in a line, so that the processed plate W is formed. The processing for each station can be simultaneously performed by one operation of the mold while feeding in order. The manufacturing apparatus 20 includes a control unit 21, and the operation of each station S <b> 1 to S <b> 7 is controlled by the control unit 21.

  Station S1 is a caulking part forming station S1, and the upper die 22 is provided with a number of half punching punches 24 corresponding to the caulking part 6 of the arcuate core piece 2, and the same number of half punching holes in the lower die 23. 25 is provided. At the crimping part forming station S1, the upper die 22 and the lower die 23 are close to each other, so that the work plate W is half-punched by the half-punching punch 24 and the half-punching hole 25, and the crimping part 6 is formed. The operation of the crimping part forming station S1 can be controlled by the control unit 21 according to the arc-shaped core piece 2 to be processed. In the crimping part forming station S1, the number of crimping parts 6 corresponding to the number of arcuate core pieces 2a having the largest arc angle (eight in this embodiment) is formed in any of the arcuate core pieces 2a and 2b. .

  The station S2 is a through hole punching station S2, and the upper die 22 is provided with a number (eight in the present embodiment) of through hole punching punches 27 corresponding to the caulking portions 6 of the arcuate core piece 2a. The same number of through-hole punching holes 28 are provided in the mold 23. In the through-hole punching station S2, the upper die 22 and the lower die 23 are close to each other, so that the workpiece plate W is punched by the through-hole punching punch 27 and the through-hole punching hole portion 28, and is placed at a position corresponding to the caulking portion 6. The through hole 11 is formed. The operation and non-operation of the through-hole punching station S2 can be controlled by the control unit 21 in accordance with the arc-shaped core piece 2 to be processed.

  The station S3 is a pilot part punching station S3, and the upper die 22 is provided with a number (four in this embodiment) of pilot punching punches 29 corresponding to the pilot holes 5 of the arc-shaped iron core piece 2a. 23 are provided with the same number of pilot punching holes 30. In the pilot part punching station S3, the upper die 22 and the lower die 23 are close to each other, so that the workpiece plate W is punched by the pilot punching punch 29 and the pilot punching hole part 30, and the pilot hole 5 is formed.

  Station S4 is a magnet mounting hole punching station S4, and the upper mold 22 is provided with a number (four in this embodiment) of magnet mounting hole punching punches 31 corresponding to the magnet mounting holes 4 of the arcuate core piece 2a. The same number of magnet mounting hole punching holes 32 are provided in the lower mold 23. In the magnet mounting hole punching station S4, the work plate W is punched by the magnet mounting hole punching punch 31 and the magnet mounting hole punching hole 32 by bringing the upper mold 22 and the lower mold 23 close to each other. Mold.

  The station S5 is a first side punching station S5, and the upper die 22 is provided with first side punching punches 43 for punching out both sides in the circumferential direction of the arc-shaped iron core piece 2b. A first side punching hole 44 is provided. In the first side punching station S <b> 5, the upper plate 22 and the lower die 23 are close to each other, whereby the work plate W is punched by the first side punching punch 43 and the first side punching hole 44.

  The first side punching station S5 processes the arc-shaped iron core piece 2b, and the operation and non-operation can be controlled by the control unit 21 so as to operate four times out of five times. When the first side punching station S5 is operated, the crimping portion 6, the through hole 11, the pilot hole 5 and the magnet mounting hole 4 formed corresponding to the arcuate core piece 2a having the largest arc angle in the stations S1 to S4. Among these, the part including the excess crimping portion 6, the through hole 11, the pilot hole 5, and the magnet mounting hole 4 is punched out.

  The station S6 is a second side punching station S6, and the upper die 22 is provided with second side punching punches 45 for punching both sides in the circumferential direction of the arc-shaped iron core piece 2a. A second side punching hole 46 is provided. In the second side punching station S <b> 6, the upper plate 22 and the lower die 23 come close to each other so that the work plate W is punched by the second side punching punch 45 and the second side punching hole 46.

  The first side punching station S6 processes the arc-shaped core piece 2a, and the operation and non-operation can be controlled by the control unit 21 so as to operate once out of five times. When the second side punching station S6 is operated, both sides in the circumferential direction are punched corresponding to the arcuate core piece 2a having the largest arc angle.

  Station S7 is an annular laminated caulking station S7 (iron core piece punched portion), and as shown in FIGS. 5 and 6, the upper die 22 is provided with an iron core piece punch 51 for punching the outline of the arc-shaped iron core piece 2a. . The iron core punching punch 51 is formed with a pilot pin 52 extending downward at a position corresponding to the pilot hole 5 of the arcuate iron core piece 2a to be punched. The lower mold 23 is provided with an iron core piece punching hole 34 having a shape corresponding to the contour of the arc-shaped iron core piece 2a. A cradle 35 for receiving the punched arc-shaped iron core piece 2 is provided below the iron core piece punching hole 34. The cradle 35 has a pilot escape hole 54 into which a pilot pin 52 can be inserted from above. It is formed. The cradle 35 is placed on a turntable 38 that is provided below the cradle 35 and is rotatable on a horizontal plane. Further, a biasing portion 56 that is biased upward by a spring 55 toward the lower surface of the tray 35 is provided between the tray 35 and the rotary base 38 and extends upward from the biasing portion 56. A holding pin 57 passes through the cradle 35. The urging portion 56 is provided by being divided into a plurality of portions in the circumferential direction. In the present embodiment, 22.5 which forms one set of one magnet mounting hole 4, one pilot hole 5, and two crimping portions 6. It is divided every degree. Accordingly, each of the divided urging portions 56 can be moved up and down independently.

  The cradle 35 is rotatable on a horizontal plane by a turntable 38, and the turntable 38 is provided so as to be movable up and down. A reaction force generation mechanism (not shown) made of a spring member, a cylinder, or the like is provided below the turntable 38. The cradle 35 has a large-diameter portion 58 that is larger than the outer diameter of the turntable 38. The turntable 38 is structured to rotate at a constant speed in response to a single press operation by an index handler. One rotation angle β [degree] is set by the following equation (2).

β = 360 × (n / m) (2)
Here, n is the number of magnet mounting holes 4 formed in the arc-shaped core piece 2b (n = 3), and m is the number of magnet mounting holes 4 formed in the laminated core 1 (m = 16). It is. Therefore, the rotation angle β is 67.5 degrees.

  Below the cradle 35, there is formed a lowering restricting portion 40 that contacts the lower surface of the large diameter portion 58 and restricts the lowering of the cradle 35 when the cradle 35 is lowered.

  The holding pins 57 are arranged in the circumferential direction on the urging portion 56 in an arrangement that coincides with the caulking portion 6 of the annular core piece 3 that is annularly formed by the arc-shaped core piece 2, and eight of them are punched out of the core piece It is located below the arc-shaped core piece 2 punched one by one by the punch 51. The other holding pins 57 can be positioned below the iron core punching punch 51 as the cradle 35 rotates. The holding pins 57 do not necessarily have to be provided in correspondence with the number of the crimping portions 6, and may be smaller than the number of the crimping portions 6.

  A pilot escape hole 54 formed in the cradle 35 is provided in the circumferential direction in the cradle 35 in an arrangement that coincides with the pilot hole 5 of the annular core piece 3 that is formed in an annular shape by the arc-shaped iron core piece 2. Four of them are located below the arc-shaped core pieces 2 punched one by one by the punching punch 51. The other pilot escape holes 54 can be positioned below the iron core punching punch 51 as the cradle 35 rotates.

  On the side of the cradle 35, a carry-out mechanism 42 that carries out the laminated core 1 manufactured at the upper part of the cradle 35 is provided. The carry-out mechanism 42 is an air cylinder whose drive is controlled by the control unit 21, for example.

  Next, the operation of the laminated core manufacturing apparatus 20 according to the first embodiment will be described.

  7 is a plan view showing when the arc-shaped core piece is punched out by the laminated core manufacturing apparatus according to the first embodiment, FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 7, and FIG. FIG. 10 is a plan view showing the punching of the second arcuate core piece, and FIG. 11 shows the punching of the fifth arcuate core piece. FIG.

  12 is a plan view showing the transition to a stack of arc-shaped core pieces of different layers, FIG. 13 is a cross-sectional view taken along line XIII-XIII in FIG. 12, and FIG. FIG. 15 is a cross-sectional view showing a state in which a laminated core is formed after the lamination of a predetermined number of arc-shaped core pieces is completed, and FIG. It is sectional drawing which shows the time of pulling out a holding pin from the laminated iron core comprised in and carrying out.

  As shown in FIGS. 4 and 5, the work plate W carried into the laminated core manufacturing apparatus 20 according to the present embodiment is first fed forward to the crimping part forming station S <b> 1. However, since the caulking portion 6 is not formed in the first five arc-shaped core pieces 2 constituting the lowermost layer of the laminated iron core 1, the machining in the station S1 is not performed, and the feed holes are sequentially fed to the through hole punching station S2. Here, the lowermost layer means a layer in contact with the cradle 35.

  The first five arc-shaped iron core pieces 2 fed forward to the through hole punching station S2 are punched by the through hole punching punch 27, and the through hole 11 is formed at a position corresponding to the caulking portion 6 (through hole punching process). ).

  Next, the work plate W is fed forward to the pilot part punching station S3 and punched by the pilot punching punch 29 to form the pilot hole 5 (pilot hole punching process).

  Next, the work plate W is sequentially fed to the magnet mounting hole punching station S4 and punched by the magnet mounting hole punching punch 31 to form the magnet mounting hole 4 (magnet mounting hole punching process).

  Next, the work plate W is sequentially fed to the first side punching station S5. The first side punching station S5 punches both sides in the circumferential direction of the arc-shaped iron core piece 2b, and is not operated when the first arc-shaped iron core piece 2a is processed. It is operated when processing the iron core piece 2b. In the stations S1 to S4, the caulking portion 6, the through hole 11 and the magnet mounting hole 4 are punched corresponding to the arcuate core piece 2a having the largest arc angle, and therefore, in the first side punching station S5, The part including the excess crimping portion 6, the through hole 11, and the magnet mounting hole 4 is removed so as to correspond to the arcuate core piece 2 b. After this, it is operated four times out of five times, and both sides in the circumferential direction of the arc-shaped core piece 2b are punched out.

  Next, the work plate W is sequentially fed to the second side punching station S6. The second side punching station S6 punches both sides in the circumferential direction of the arc-shaped core piece 2a, operates when processing the first arc-shaped core piece 2a, and the subsequent four arc-shaped core pieces. It does not work when machining 2b. After that, it operates once out of 5 times, and both sides in the circumferential direction of the arc-shaped core piece 2a are punched out.

  Thereafter, the work plate W is sequentially fed to the annular laminated crimping station S7, and the arc-shaped iron core piece 2a is punched by the iron core punching punch 51 as shown in FIGS. Thereby, the arc-shaped iron core piece 2a punched by the iron core piece punching punch 51 is pressed against the cradle 35 (iron core piece punching step). At this time, the pilot pin 52 is inserted into the pilot hole 5 and the pilot escape hole 54 of the punched arc-shaped iron core piece 2a, and the arc-shaped iron core piece 2 is annularly positioned with high accuracy. Further, the holding pin 57 is urged upward by the spring 55 while the tip is pushed back by the iron core punching punch 51. Since the caulking portion 6 is not formed on the arc-shaped iron core piece 2 in contact with the cradle 35, the arc-shaped iron core piece 2 is favorably held on the cradle 35.

  Thereafter, when the iron core piece punch 51 returns upward, the pilot pin 52 also returns upward, but the holding pin 57 moves upward by the spring 55 and penetrates the through hole 11 of the arc-shaped iron core piece 2a. As a result, the lowermost arc-shaped core piece 2a in contact with the cradle 35 is annularly positioned with high accuracy.

  Thereafter, as shown in FIG. 10, the cradle 35 is rotated by 67.5 degrees which is the rotation angle β. At this time, since the annular positioning is performed with high accuracy by the holding pin 57, the positional accuracy of the arc-shaped core piece 2 can be satisfactorily maintained even when the cradle 35 rotates.

  Further, the lowermost four arc-shaped core pieces 2b sequentially processed by the stations S2 to S6 from the workpiece W to be sequentially fed are punched sequentially at the annular laminated caulking station S7, and the cradle for each core piece punching step. As shown in FIG. At this time, each arcuate core piece 2 is held on the cradle 35 with the pilot pin 52 inserted into the through hole 11. The iron core punching punch 51 and the iron core punching hole 34 are formed in a shape corresponding to the arc-shaped iron core piece 2a having a large arc angle, but the circumferential direction of the arc-shaped iron core piece 2b on the workpiece W Since the side portion is punched by the first side punching station S5, the arc-shaped core piece 2b having a small arc angle can be punched well. In addition, since not only one side of the circumferential side part of the arc-shaped iron core piece 2b but both sides are punched, the load balance at the time of punching can be made appropriate.

  After all the five arc-shaped core pieces 2 constituting the same annular core piece 3 are arranged on the cradle 35, the process proceeds to the stacking of the arc-shaped core pieces 2 constituting the next layer. The rotation angle β of the cradle 35 at this time is 67.5 degrees, as shown in FIG. 12, without changing when the arc-shaped core pieces 2 of the same layer are arranged. As described above, the arc-shaped core pieces 2a and 2b having different arc angles are included in the same annular core piece 3 and the rotation angle at the time of stacking is always constant. The joint 10 between the arc-shaped iron core pieces 2 has a phase shift α. That is, the five arc-shaped core pieces 2 constituting the same annular core piece 3 are arranged to form a 360-degree ring shape. When punching out the five arc-shaped core pieces 2, 35 rotates only 337.5 degrees obtained by multiplying the rotation angle β (67.5 degrees) by 5 times, and does not coincide with 360 degrees. Therefore, a phase shift α (= 22.5 degrees) is generated from this difference. It will be.

  Note that the arc-shaped iron core piece 2 after the lowermost layer is different from the processing of the lowermost arc-shaped iron core piece 2 and the through hole punching station S2 is not operated after the caulking part 6 is formed in the caulking part forming station S1. Further, the through hole 11 is not formed. Thereafter, the stations S3 to S6 are operated in the same manner as in the case of the lowermost arc-shaped core piece 2, and the arc-shaped core piece 2a and the arc-shaped core piece 2b in which the pilot hole 5 and the magnet mounting hole 4 are formed are provided. Processed sequentially.

  As shown in FIGS. 13 and 14, the workpiece plate W fed forward to the annular laminating crimping station S7 is punched by an iron core punching punch 51 (iron core punching step). As a result, the pilot pin 52 is inserted into both the pilot hole 5 of the punched arc-shaped core piece 2 and the pilot hole 5 of the arc-shaped core piece 2 in the lower layer, and the second-layer arc-shaped core piece. 2 is annularly positioned with high accuracy with respect to the lower arc-shaped core piece 2. Further, the caulking convex portion 7 of the second-layer arc-shaped core piece 2 is fitted into the lower through-hole 11, and the first-layer and second-layer arc-shaped core pieces 2 are positioned with high accuracy. Bonded and fixed (annular lamination caulking process). At this time, the punched arc-shaped iron core piece 2 receives a reaction force by a reaction force generation mechanism (not shown) below the turntable 38, so that it is caulked and joined with an optimum force.

  Moreover, since the pilot escape hole 54 is provided in the cradle 35, the pilot pin 52 does not receive interference from the cradle 35 and positioning with high accuracy is possible. Further, during the caulking coupling, the holding pin 57 is pushed downward by the caulking convex portion 7 and retracts, and does not interfere with the caulking coupling.

  Thereafter, when the iron core punching punch 51 returns upward, the pilot pin 52 also returns upward. However, since the overlapping arc core pieces 2 are already fixed by caulking, the positioning of the arc core pieces 2 is high. Preserved in accuracy.

  When the second layer is stacked, the holding pin 57 remains in a retracted state, but the tip portion thereof is partially inserted into the through hole 11 to hold the arc-shaped core piece 2.

  Thereafter, while rotating the cradle 35 at a constant rotation angle β for each core piece punching process, the workpiece W to be fed forward is sequentially processed by the stations S1, S3 to 7, and the arc-shaped core piece 2 is lowered to the lower layer. The arc-shaped iron core pieces 2 are caulked and laminated. In addition, the caulking convex part 7 of the arc-shaped iron core piece 2 after the third layer is fitted into the caulking concave part 8 of the lower layer and is caulked and joined.

  As shown in FIG. 15, the lamination ends when the laminated core core 1 is configured by laminating the annular core pieces 3 having a preset number of layers.

  Thereafter, when the turntable 38 is moved downward as shown in FIG. 16, the large-diameter portion 58 comes into contact with the lowering restricting portion 40 and the lowering of the receiving stand 35 is restricted, so that the holding pin 57 is inserted into the through hole 11. Retreat completely from. Thereby, the laminated iron core 1 can move smoothly in the horizontal direction on the turntable 38. Thereafter, the laminated iron core 1 left on the cradle 35 is pushed out by the carry-out mechanism 42 and carried out.

  According to the laminated core manufacturing apparatus 20 according to the present embodiment, at least one of the plurality of arc-shaped core pieces 2 constituting the same annular core piece 3 has a different arc angle from the other arc-shaped core pieces 2b. By laminating with the rotation angle β kept constant, the laminated iron core 1 can be manufactured with the phase shift α. Therefore, it is not necessary to irregularly control the rotation angle of the turntable 38 in order to provide the phase shift α, and a complicated structure is unnecessary, so that the equipment can be realized at low cost. In addition, productivity is improved because processing is not irregular.

  Further, since the difference in arc angle between the arc-shaped core piece 2a and the arc-shaped core piece 2b is only one of the magnet mounting holes 4, the difference in arc angle between the arc-shaped core piece 2a and the arc-shaped core piece 2b is It doesn't get too big. Therefore, the material of both the arc-shaped iron core piece 2a and the arc-shaped iron core piece 2b can be efficiently taken from the work plate W, and the yield is good. The difference in arc angle between the arc-shaped core piece 2a and the arc-shaped core piece 2b can be made to coincide with a plurality of magnet mounting holes 4.

  In addition, as in the present embodiment, the laminated core 1 is composed of i circular arc core pieces 2b having n magnet mounting holes 4 and one circle having (n + 1) magnet mounting holes 4. An annular core piece 3 formed by arranging the arc-shaped core pieces 2a is laminated to have m = i × n + (n + 1) magnet mounting holes, so that a reliable phase shift α can be generated. .

  In addition, since the manufacturing apparatus 20 according to the present embodiment stacks the arc-shaped core pieces 2 while providing the phase shift α, the arc-shaped core pieces 2 in the stacking direction and the circumferential direction can be fixed by caulking coupling, and in a subsequent process There is no need for joining, cost can be reduced, and productivity is excellent.

Second Embodiment
FIG. 17 is a plan view showing a laminated iron core manufactured by the laminated iron core manufacturing apparatus according to the second embodiment. In addition, about the site | part which has the same function as 1st Embodiment, the same code | symbol is used and in order to avoid duplication, the description is abbreviate | omitted.

  The laminated iron core 60 in the present embodiment is a laminated rotor core used on the rotor side of the electric motor, and is a constituent element of an annular rotor with magnet having 15 magnet mounting holes 4. As shown in FIG. 17, the laminated core 60 is formed by laminating a plurality of annular core pieces 63 in which arc-shaped core pieces 62 a and 62 b (iron core pieces) divided into four pieces are arranged in a ring shape.

  Three magnet mounting holes 4 arranged in the circumferential direction are formed in one arc-shaped core piece 62a of the arc-shaped core pieces 62 (hereinafter, 62a and 62b are collectively referred to as 62), and three circles are formed. Four magnet mounting holes 4 arranged in the circumferential direction are formed in the arc-shaped iron core piece 62b.

  That is, the laminated iron core 60 is provided with i (= 3) arcuate core pieces 62b having n (= 1) magnet mounting holes 4 and 1 (n-1) magnet mounting holes 4. An annular core piece 63 formed by arranging a plurality of arc-shaped core pieces 62a is laminated and formed with m magnet mounting holes set by the following equation (3).

m = i × n + (n−1) (3)
The magnet mounting hole 4, the pilot hole 5, and the four caulking portions 6 are arranged every 24 degrees when the arc-shaped iron core pieces 62 are arranged in an annular shape to form the annular iron core piece 63.

  The annular core pieces 63 that are overlapped with each other are formed by stacking a predetermined number of so-called bricks in which the joints 64 between the circular arc-shaped core pieces 62 in the circumferential direction are shifted in the circumferential direction. In this embodiment, the phase shift α is 24 degrees. Are stacked.

  Next, the laminated core manufacturing apparatus 65 according to the second embodiment will be described.

  FIG. 18 is a plan view showing the laminated core manufacturing apparatus according to the second embodiment.

  The laminated core manufacturing apparatus 65 according to the second embodiment includes stations S1-2 to S7-2 corresponding to the stations S1 to S7 of the first embodiment.

  In the stations S1-2 to S4-2, the caulking portion 6, the through hole 11, the pilot hole 5, and the magnet mounting hole 4 are sequentially processed as in the stations S1 to S4 of the first embodiment.

  The first side punching station S5-2 processes the arc-shaped core piece 62a, and the operation and non-operation can be controlled by the control unit 21 so as to operate once out of four times. When the first side punching station S5-2 is operated, both side portions in the circumferential direction are punched out corresponding to the arcuate core pieces 62a.

  The second side punching station S6-2 processes the arc-shaped core piece 62b, and the operation and non-operation can be controlled by the control unit 21 so as to operate three times out of four times. When the second side punching station S6-2 is operated, both side portions in the circumferential direction are punched out corresponding to the arcuate core pieces 62b.

  As in the first embodiment, the annular laminated caulking station S7-2 punches out the outline of the arc-shaped core piece 62b having a large arc angle, and stacks the arc-shaped core piece 62 on the cradle 35.

  The single rotation angle β [degree] of the cradle 35 is set by the above-described equation (2). Here, n is the number of magnet mounting holes 4 formed in the arc-shaped core piece 62b (n = 4), and m is the number of magnet mounting holes formed in the laminated core 60 (m = 15). is there. Therefore, the rotation angle β is 96 degrees.

  Next, the operation of the laminated core manufacturing apparatus 65 according to the second embodiment will be described.

  19 is a plan view showing when the arc-shaped core piece is punched out by the laminated core manufacturing apparatus according to the second embodiment, and FIG. 20 is a plan view showing when the second arc-shaped core piece is punched, FIG. Fig. 22 is a plan view showing when the fourth arc-shaped core piece is punched, Fig. 22 is a plan view showing the transition to stacking of arc-shaped core pieces of different layers, and Fig. 23 is a further arc-shaped core. It is a top view which shows the time of punching out a piece.

  As shown in FIG. 18, the work plate W carried into the laminated core manufacturing apparatus 65 according to the present embodiment is sequentially fed to the crimping part forming station S1-2. However, since the caulking portion 6 is not formed in the first four arc-shaped core pieces 62 constituting the lowermost layer of the laminated core 60, the processing in the station S1-2 is not performed, and the feed holes are sequentially fed to the through hole punching station S2-2. Is done.

  The first four arc-shaped iron core pieces 62 sequentially fed to the through-hole punching station S2-2 are punched, and the through-hole 11 is formed at a position corresponding to the caulking portion 6 (through-hole punching process).

  Next, the work plate W is fed forward to the pilot part punching station S3-2 and punched to form the pilot hole 5 (pilot hole punching process).

  Next, the work plate W is forwarded to the magnet mounting hole punching station S4-2 and punched to form the magnet mounting hole 4 (magnet mounting hole punching process).

  Next, the work plate W is sequentially fed to the first side punching station S5-2. The first side punching station S5-2 punches both sides in the circumferential direction of the arc-shaped core piece 62a and does not operate when the first three arc-shaped core pieces 62b are machined. It operates when processing one arc-shaped iron core piece 62a. After this, it operates once out of four times, and both sides in the circumferential direction of the arc-shaped iron core piece 62a are punched out.

  Next, the work plate W is sequentially fed to the second side punching station S6-2. The second side punching station S6-2 punches both sides in the circumferential direction of the arc-shaped iron core piece 62b, and operates when the first three arc-shaped iron core pieces 62b are machined. It does not operate when machining the arc-shaped core piece 62a. After this, it is operated three times out of four times, and both sides in the circumferential direction of the arc-shaped core piece 62b are punched out.

  Thereafter, as shown in FIG. 19, the work plate W is sequentially fed to the annular laminated caulking station S <b> 7-2, and the arc-shaped iron core pieces 62 b are punched and arranged on the cradle 35.

  Thereafter, as shown in FIG. 20, the cradle 35 is rotated by 96 degrees which is the rotation angle β.

  Further, the lowermost two arc-shaped core pieces 62b and one arc-shaped core piece 62a, which are sequentially processed by the stations S2-2 to S6-2 from the workpiece W to be sequentially fed, are formed into an annular laminated caulking station S7-2. The cradle 35 is rotated at a certain rotation angle β while sequentially punching out and arranged in an annular shape as shown in FIG.

  After all the four arc-shaped core pieces 62 constituting the same annular core piece 63 are arranged on the cradle 35, the process proceeds to the stacking of the arc-shaped core pieces 62 constituting the next layer. The rotation angle β of the cradle 35 at this time is 96 degrees, as shown in FIG. 22, without changing when the arc-shaped core pieces 62 of the same layer are arranged. As described above, the arc-shaped core pieces 62a and 62b having different arc angles are included in the same annular core piece 63, and the rotation angle β when the layers are stacked is always constant. The joint 64 between the arcuate core pieces 62 in the direction has a phase shift α. That is, the four arc-shaped core pieces 62 constituting the same annular core piece 63 are arranged to form a 360-degree ring shape. When punching out the four arc-shaped core pieces 62, the cradle 35 is rotated by 384 degrees obtained by multiplying the rotation angle β (96 degrees) by 4 times, and does not coincide with 360 degrees. Therefore, a phase shift α (= 24 degrees) is generated from this difference.

  Note that the arc-shaped core pieces 62 in the lowermost layer and the lower layers are different from the processing of the arc-shaped core piece 62 in the lowermost layer, and after the caulking portion 6 is formed in the caulking portion forming station S1-2, the through-hole punching station S2-2. Is not operated, and the through hole 11 is not formed. Thereafter, the stations S3-2 to S6-2 operate in the same manner as in the case of the lowermost arc-shaped core piece 62, and the arc-shaped core piece 62a in which the pilot hole 5 and the magnet mounting hole 4 are formed and the arc shape. The iron core pieces 62b are sequentially processed.

  The work plate W fed forward to the annular laminated crimping station S7-2 is punched by the iron core single punch 51 (iron core punching step). As a result, the caulking convex portion 7 of the second-layer arc-shaped core piece 62 is fitted into the lower through-hole 11 and the first-layer and second-layer arc-shaped core pieces 62 are positioned with high accuracy. Caulking and fixing (annular lamination caulking process).

  After that, as shown in FIG. 23, while rotating the cradle 35 at a constant rotation angle β, the processing target plate W is sequentially processed by the stations S1-2, S3-2 to 7-2, The arc-shaped iron core piece 62 is laminated by being caulked with the lower arc-shaped iron core piece 62.

  Thereafter, when the predetermined number of layers of the annular core pieces 63 are laminated to form the laminated core 60, the lamination is completed.

  Also in the laminated core manufacturing apparatus 20 according to the present embodiment, as in the first embodiment, at least one of the plurality of arc-shaped core pieces 62 constituting the same annular core piece 63 is replaced with another arc-shaped core piece 62b. Since the arc angles are different from each other, the laminated iron core 60 can be manufactured with the phase shift α by laminating with the rotation angle β kept constant. Therefore, it is not necessary to irregularly control the rotation angle β of the turntable 38 in order to provide the phase shift α, and a complicated structure is unnecessary, so that the equipment can be realized at low cost. In addition, productivity is improved because processing is not irregular.

  Further, since the arc-shaped iron core piece 62a and the arc-shaped iron core piece 62b are different in arc angle by only one of the magnet mounting holes 4, the difference in arc angle between the arc-shaped iron core piece 62a and the arc-shaped iron core piece 62b. Is not too big. Therefore, the material of both the arc-shaped core piece 62a and the arc-shaped core piece 62b can be efficiently taken from the work plate W, and the yield is good. The difference in arc angle between the arc-shaped core piece 62a and the arc-shaped core piece 62b can be made to coincide with a plurality of magnet mounting holes 4.

  Further, in the present embodiment, since the number of arc-shaped core pieces 62b having a large arc angle is larger than that of the arc-shaped core pieces 62a, the arc-shaped core pieces 62a and the arc-shaped core pieces 62b are efficiently taken from the workpiece plate W. The yield is better than that of the first embodiment.

  Further, as in this embodiment, the laminated iron core 60 includes one arc-shaped iron core piece 62b including n magnet mounting holes 4 and one sheet including (n-1) magnet mounting holes 4. The annular core pieces 63 formed by arranging the arc-shaped core pieces 62a are stacked so as to have m = i × n + (n−1) magnet mounting holes, thereby generating a reliable phase shift α. Can be made.

<Third Embodiment>
FIG. 24 is a plan view showing a laminated core manufactured by the laminated core manufacturing apparatus according to the third embodiment. In addition, about the site | part which has the same function as 1st Embodiment, the same code | symbol is used and in order to avoid duplication, the description is abbreviate | omitted.

  The laminated core 70 in the third embodiment is a laminated stator core used on the stator side of the electric motor, and is a constituent element of a stator having 24 teeth around which coils are wound. As shown in FIG. 24, the laminated core 70 is formed by laminating a plurality of annular core pieces 71 in which arc-shaped core pieces 72a and 72b (iron pieces) divided into five pieces are arranged in a ring shape.

  The arc-shaped core piece 72 has an arc-shaped yoke portion 73 that extends in an arc shape in the circumferential direction of the annular core piece, and a teeth portion 74 that protrudes from the arc-shaped yoke portion 73 and on which a coil is mounted.

  Of the arc-shaped iron core pieces 72 (hereinafter, 72a and 72b are collectively referred to as 72), one arc-shaped iron core piece 72a is formed with four teeth portions 74 arranged in the circumferential direction, and four arc-shaped iron core pieces 72a are formed. Five teeth 74 arranged in the circumferential direction are formed on the iron core piece 72b.

  That is, the laminated core 70 includes i (= 4) arcuate core pieces 72b including n (= 5) teeth portions 74 and one sheet including (n-1) teeth portions 74. An annular core piece 71 formed by arranging arc-shaped core pieces 72a is laminated and formed with m teeth portions 74 set by the following equation (4).

m = i × n + (n−1) Expression (4)
The teeth 74, the pilot holes 5 and the four caulking portions 6 are arranged every 15 degrees (= 360 / m) when the circular core pieces 71 are formed by arranging the circular core pieces 72 in a ring shape.

  The annular core pieces 71 that are overlapped with each other are formed by stacking a predetermined number of so-called bricks in which the joints 75 between the circular arc-shaped core pieces 72 in the circumferential direction are shifted in the circumferential direction. In this embodiment, the phase shift α is 15 degrees. Are stacked.

  Next, a laminated core manufacturing apparatus 76 according to the third embodiment will be described.

  FIG. 25 is a plan view showing the laminated core manufacturing apparatus according to the third embodiment.

  The laminated iron core manufacturing apparatus 76 according to the third embodiment includes stations S1-3 to S3-3 and S5-3 to S7-3 corresponding to the stations S1 to S3 and S5 to S7 of the first embodiment. . In the third embodiment, since no magnet mounting hole is formed, a station corresponding to the magnet mounting hole punching station S4 in the first embodiment is not provided. Since the tooth part 74 can be formed by punching by the annular laminated caulking station S7-3, an independent station for forming the tooth part 74 is not provided.

  In the stations S1-3 to S3-3, the caulking portion 6, the through hole 11, and the pilot hole 5 are sequentially processed.

  The first side punching station S5-3 processes the arc-shaped core piece 72a, and the operation and non-operation can be controlled by the control unit 21 so as to operate once out of five times. When the first side punching station S5-3 is operated, both sides in the circumferential direction are punched out corresponding to the arcuate core pieces 72a.

  The second side punching station S6-3 processes the arc-shaped core piece 72b, and the operation and non-operation can be controlled by the control unit 21 so as to operate four times out of five times. When the second side punching station S6-3 is operated, both sides in the circumferential direction are punched out corresponding to the arc-shaped core pieces 72b.

  As in the first embodiment, the annular laminated crimping station S7-3 punches out the outline of the arc-shaped core piece 72a and stacks the arc-shaped core piece 72 on the cradle 35.

  One rotation angle β [degree] of the cradle 35 is set by the equation (2). Here, n is the number of teeth 74 formed on the arc-shaped core piece 72b (n = 5), and m is the number of teeth 74 formed on the laminated core 70 (m = 24). . Therefore, the rotation angle β is 75 degrees.

  Next, the operation of the laminated core manufacturing apparatus 76 according to the third embodiment will be described.

  FIG. 26 is a plan view showing when the arc-shaped core piece is punched by the laminated core manufacturing apparatus according to the third embodiment, and FIG. 27 is a plan view showing when the second arc-shaped core piece is punched, FIG. FIG. 29 is a plan view showing when a fifth arc-shaped core piece is punched out, and FIG. 29 is a plan view showing a transition to stacking of arc-shaped core pieces of different layers.

  As shown in FIG. 25, the work plate W carried into the laminated core manufacturing apparatus 76 according to the third embodiment is first fed forward to the crimping part forming station S1-3. However, since the caulking portion 6 is not formed in the first five arc-shaped core pieces 72 constituting the lowermost layer of the laminated core 70, the processing in the station S1-3 is not performed, and the feed is sequentially performed to the through hole punching station S2-3. Is done.

  The first five arc-shaped iron core pieces 72 sequentially fed to the through-hole punching station S2-3 are formed with the through-holes 11 at positions corresponding to the caulking portions 6 (through-hole punching process).

  Next, the work plate W is fed forward to the pilot part punching station S3-3, and the pilot hole 5 is formed (pilot hole punching process).

  Next, the work plate W is sequentially fed to the first side punching station S5-3. The first side punching station S5-3 punches both sides in the circumferential direction of the arc-shaped core piece 72a, and is not operated when processing the first four arc-shaped core pieces 72b. It operates when processing one arc-shaped iron core piece 72a. After this, it is operated once out of 5 times, and both sides in the circumferential direction of the arc-shaped core piece 72a are punched out.

  Next, the work plate W is sequentially fed to the second side punching station S6-3. The second side punching station S6-3 punches both sides in the circumferential direction of the arc-shaped core piece 72b, and is operated when processing the first four arc-shaped core pieces 72b. It is not operated when processing the arc-shaped core piece 72a. After this, it is operated four times out of five times, and both sides in the circumferential direction of the arc-shaped core piece 72b are punched out.

  Thereafter, as shown in FIG. 26, the work plate W is sequentially fed to the annular laminated caulking station S <b> 7-3, and the arc-shaped core pieces 72 b are punched and arranged on the cradle 35.

  Thereafter, as shown in FIG. 27, the cradle 35 is rotated by 75 degrees which is the rotation angle β.

  Further, the lowermost three arc-shaped iron core pieces 72b and one arc-shaped iron core piece 72a that are sequentially processed by the stations S2-3 to S6-3 from the workpiece W to be sequentially fed are formed into an annular laminated caulking station S7-3. Then, the cradle 35 is rotated at a constant rotation angle β while sequentially punching out and arranged in an annular shape as shown in FIG.

  After all the five arc-shaped core pieces 72 constituting the same annular core piece 71 are arranged on the cradle 35, the process proceeds to the stacking of the arc-shaped core pieces 72 constituting the next layer. The rotation angle β of the cradle 35 at this time is 75 degrees, as shown in FIG. 29, without changing when the arc-shaped core pieces 72 of the same layer are arranged. As described above, the arc-shaped core pieces 72a and 72b having different arc angles are included in the same annular core piece 71, and the rotation angle at the time of stacking is always constant. The joint 75 between the arc-shaped core pieces 72 has a phase shift α. That is, the five arc-shaped core pieces 72 constituting the same annular core piece 71 are arranged to form a 360-degree ring shape. When punching out the five arc-shaped core pieces 72, the cradle 35 rotates 375 degrees obtained by multiplying the rotation angle β (75 degrees) by 5 times, and does not coincide with 360 degrees. Therefore, a phase shift α (= 15 degrees) is generated from this difference.

  Note that the arc-shaped core piece 72 after the lowermost layer is different from the processing of the arc-shaped core piece 72 in the lowermost layer, and after the caulking portion 6 is formed in the caulking portion forming station S1-3, the through-hole punching station S2-3. Is not operated, and the through hole 11 is not formed. Thereafter, the stations S3-3 to S6-3 are operated in the same manner as the lowermost arc-shaped core piece 72, and the arc-shaped core piece 72a and the arc-shaped core piece 72b in which the pilot holes 5 are formed are sequentially formed. Processed.

  The workpiece plate W that has been sequentially fed to the annular laminated crimping station S7-3 is punched (iron core piece punching step). Thus, the caulking convex portion 7 of the second-layer arc-shaped core piece 72 is fitted into the lower through-hole 11, and the first-layer and second-layer arc-shaped core pieces 72 are positioned with high accuracy. Caulking and fixing (annular lamination caulking process).

  Thereafter, while rotating the cradle 35 at a constant rotation angle β, the workpiece W to be sequentially fed is sequentially processed by the stations S1-3 and S3-3 to 7-3, and the arc-shaped core piece 72 is formed in the lower layer. The arc-shaped iron core pieces 72 are caulked and laminated.

  Thereafter, when the predetermined number of layers of the annular core pieces 71 are laminated to form the laminated core 70, the lamination is completed.

  Also in the laminated core manufacturing apparatus 76 according to the third embodiment, at least one of the plurality of arc-shaped core pieces 72 constituting the same annular core piece 71 is another arc-shaped core piece as in the first embodiment. Since the arc angle is different from that of 72b, the laminated core 70 can be manufactured while having the phase shift α by laminating with the rotation angle β kept constant. Therefore, it is not necessary to irregularly control the rotation angle β of the turntable 38 in order to provide the phase shift α, and a complicated structure is unnecessary, so that the equipment can be realized at low cost. In addition, productivity is improved because processing is not irregular.

  In addition, since the arc-shaped iron core piece 72a and the arc-shaped iron core piece 72b are different in arc angle by one tooth portion 74, there is a difference in arc angle between the arc-shaped iron core piece 72a and the arc-shaped iron core piece 72b. It doesn't get too big. Therefore, the material of both the arc-shaped iron core piece 72a and the arc-shaped iron core piece 72b can be efficiently taken from the workpiece plate W, and the yield is good. Note that the difference in arc angle between the arc-shaped core piece 72 a and the arc-shaped core piece 72 b can be made to coincide with a plurality of teeth 74.

  Further, in the present embodiment, since the number of arc-shaped core pieces 72b having a large arc angle is larger than that of the arc-shaped core pieces 72a, the arc-shaped core pieces 72a and the arc-shaped core pieces 72b are efficiently taken from the workpiece plate W. And yield is good.

  Further, as in the present embodiment, the laminated iron core 70 is composed of i circular arc core pieces 72b including n teeth portions 74 and one circle including (n-1) teeth portions 74. Since the annular core pieces 71 formed by arranging the arc-shaped core pieces 72a are stacked and have m = i × n + (n−1) teeth portions 74, a reliable phase shift α can be generated.

<Fourth embodiment>
FIG. 30 is a plan view showing the laminated core manufacturing apparatus according to the fourth embodiment.

  The laminated iron core manufacturing apparatus 80 according to the fourth embodiment is different from the first to third embodiments in the arrangement of the arc-shaped iron core pieces 82 whose material is taken on the work plate W. That is, in the first to third embodiments, the arc-shaped iron core pieces are taken so that the circumferential end portions are located on both edge sides of the workpiece plate W, but in the fourth embodiment, the workpiece is processed. The material is taken so that the circumferential end is positioned in the feed direction of the plate W.

  Also in the fourth embodiment, since at least one of the plurality of arc-shaped core pieces 82 constituting the same annular core piece has a different arc angle from the other arc-shaped core pieces 82, the rotation angle β is kept constant. By laminating, a laminated core can be manufactured while having a phase shift α.

<Fifth Embodiment>
FIG. 31 is a plan view showing the laminated core manufacturing apparatus according to the fifth embodiment.

  The laminated core manufacturing apparatus 90 according to the fifth embodiment includes a caulking part forming station S1-5, a through hole punching station S2-5, and a pilot part punching station corresponding to the stations S1-2 to S6-2 of the second embodiment. S3-5, magnet mounting hole punching station S4-5, first side punching station S5-5, and second side punching station S6-5 are processed in parallel by pressing the two processing shapes T1 to T6. To be provided. Further, two annular laminated crimping stations S7-5 are arranged side by side in the progressive direction.

  On the workpiece plate W, two identical processed shapes T1 to T6 processed at each of the stations S1-5 to S6-5 are arranged. One of the processed shapes T1 to T6 is punched at one of the annular laminated caulking stations S7-5, and the other one is punched at the other of the annular laminated caulking stations S7-5, and each of them is formed as a separate laminated iron core. Laminated on the two cradle 35.

  According to the laminated core manufacturing apparatus 90 according to the fifth embodiment, two laminated iron cores are laminated at the same time (two-layer lamination), so that productivity can be improved and processing costs can be reduced. In addition, it can also be set as many multi-layer structure by changing a structure.

  Moreover, the process in station S1-5-S6-5 and the process in cyclic | annular lamination crimping station S7-5 which punches and crimps can also be implemented by another type (separate equipment).

  The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the claims. For example, the arc-shaped iron core piece may be punched out in a state where it is continuously connected from a strip-shaped plate material. Further, the pilot mechanism can be formed so as to be inserted into the magnet through hole or to maintain the outline of the arc-shaped core piece instead of being configured as a pilot pin inserted into the arc-shaped core piece. Further, the iron core piece does not necessarily have an arc shape, and the number of pilot holes and caulking portions may be different. Moreover, you may fix arc-shaped core pieces which mutually overlap by methods other than caulking coupling.

It is a top view which shows the laminated core manufactured by the manufacturing apparatus of the laminated core which concerns on 1st Embodiment of this invention. It is a side view which shows the same laminated iron core. It is sectional drawing of the single layer in alignment with the III-III line of FIG. It is a top view which shows the manufacturing apparatus of the laminated iron core which concerns on 1st Embodiment. It is sectional drawing which follows the VV line of FIG. It is sectional drawing which follows the VI-VI line of FIG. It is a top view which shows the time of punching out an arc-shaped core piece with the manufacturing apparatus of the laminated core which concerns on 1st Embodiment. It is sectional drawing which follows the VIII-VIII line of FIG. It is sectional drawing which shows the time of punching out the arc-shaped iron core piece in the same cross section. It is a top view which shows the time of punching out the 2nd circular arc-shaped core piece. It is a top view which shows the time of punching out the 5th circular arc-shaped core piece. It is a top view which shows the time of transfering to the lamination | stacking of the arc-shaped iron core piece of a different layer. It is sectional drawing which follows the XIII-XIII line | wire of FIG. It is sectional drawing which shows the time of punching the arc-shaped iron core piece in the same cross section, and carrying out caulking lamination. It is sectional drawing which shows the time of lamination | stacking of the arc-shaped iron core piece of the predetermined number of layers in the same cross section, and the laminated iron core being comprised. It is sectional drawing which shows at the time of extracting and carrying out a holding pin from the laminated iron core comprised in the same cross section. It is a top view which shows the laminated iron core manufactured with the manufacturing apparatus of the laminated iron core which concerns on 2nd Embodiment. It is a top view which shows the manufacturing apparatus of the laminated iron core which concerns on 2nd Embodiment. It is a top view which shows the time of punching out an arc-shaped core piece with the manufacturing apparatus of the laminated core which concerns on 2nd Embodiment. It is a top view which shows the time of punching out the 2nd circular arc-shaped core piece. It is a top view which shows the time of punching out the 4th arc-shaped iron core piece. It is a top view which shows the time of transfering to the lamination | stacking of the arc-shaped iron core piece of a different layer. Furthermore, it is a top view which shows the time of punching out the next circular arc-shaped core piece. It is a top view which shows the laminated iron core manufactured with the manufacturing apparatus of the laminated iron core which concerns on 3rd Embodiment. It is a top view which shows the manufacturing apparatus of the laminated core which concerns on 3rd Embodiment. It is a top view which shows the time of punching out an arc-shaped core piece with the manufacturing apparatus of the laminated core which concerns on 3rd Embodiment. It is a top view which shows the time of punching out the 2nd circular arc-shaped core piece. It is a top view which shows the time of punching out the 5th circular arc-shaped core piece. It is a top view which shows the time of transfering to the lamination | stacking of the arc-shaped iron core piece of a different layer. It is a top view which shows the manufacturing apparatus of the laminated core which concerns on 4th Embodiment. It is a top view which shows the manufacturing apparatus of the laminated core which concerns on 5th Embodiment.

Explanation of symbols

1,60,70 laminated iron core,
2, 62, 72, 82 Arc-shaped core pieces (core pieces),
3,63,71 annular core pieces,
4 Magnet mounting holes,
6 Caulking club,
10 seams,
11 Through hole,
20, 65, 76, 80, 90 production equipment,
35 cradle,
74 Teeth Club,
i Number of core pieces,
m Number of magnet mounting holes, number of teeth in the laminated iron core,
n Number of magnet mounting holes in the core piece, number of teeth,
S5, S5-2, S5-3, S5-5 annular laminated caulking station (iron punched out part),
T1-T6 machining shape,
W work board,
α phase shift,
β rotation angle.

Claims (25)

A method of manufacturing a laminated core, in which a laminated core, in which a plurality of annular core pieces made of a plurality of annularly arranged core pieces are laminated and fixed, is manufactured by punching the core pieces from a work plate conveyed in one direction,
The core pieces are sequentially punched from the work plate so that at least one arc angle of a plurality of core pieces constituting the same annular core piece is different from the arc angle of other core pieces constituting the same annular core piece. A method of manufacturing a laminated core, comprising: stacking the punched core pieces in a circular sequence on a cradle that rotates constantly each time the core pieces are punched.   2. The method of manufacturing a laminated core according to claim 1, wherein the punched iron core pieces are sequentially arranged in a ring on the cradle, and the iron core pieces that overlap each other are caulked and joined together. The annular core piece, i pieces of iron core pieces provided with n pieces of magnet attaching holes to which magnets are attached or teeth portions to which coils are attached, and one piece having (n + 1) pieces of magnet attaching holes or teeth portions. The laminated core according to claim 1 or 2, wherein a laminated core having a number m of magnet mounting holes or teeth portions set in accordance with the following formula is manufactured in a circumferential direction. Production method.
m = i × n + (n + 1) The annular core piece is provided with i pieces of iron core pieces including n pieces of magnet mounting holes to which magnets are mounted or teeth portions to which coils are mounted, and (n-1) pieces of magnet mounting holes or teeth portions. The laminated core according to claim 1 or 2, wherein one laminated core core is arranged side by side, and a laminated core having m magnet mounting holes or teeth portions set by the following formula in the circumferential direction is manufactured. Manufacturing method of iron core.
m = i * n + (n-1) The method of manufacturing a laminated core according to claim 3 or 4, wherein the rotation angle β of the cradle is set by the following equation.
β = 360 × (n / m)   The laminated iron core is an iron core for an annular rotor having 16 magnet mounting holes, and includes four pieces of iron cores having three magnet mounting holes and one sheet having four magnet mounting holes. The method of manufacturing a laminated core according to claim 3, wherein the annular core pieces are configured by arranging the core pieces.   The laminated iron core is an iron core for an annular rotor having 15 magnet mounting holes, and is composed of three core pieces each having four magnet mounting holes and one sheet having three magnet mounting holes. The method of manufacturing a laminated core according to claim 4, wherein the annular core pieces are configured by arranging core pieces.   The laminated iron core is an iron core for an annular stator having 24 teeth portions, and includes four iron core pieces having five teeth portions and one iron core piece having four teeth portions. The method for manufacturing a laminated core according to claim 4, wherein the annular core pieces are arranged side by side.   A plurality of the cradles are provided in the conveying direction of the work plate, and a plurality of core pieces are simultaneously punched from the same work plate and stacked on the cradle. The manufacturing method of the laminated iron core as described in a term. A laminated core manufacturing apparatus for manufacturing a laminated core obtained by stacking and fixing a plurality of annular core pieces made of a plurality of annularly arranged core pieces while punching the core pieces from a work plate conveyed in one direction,
The core pieces are sequentially punched from the work plate so that at least one arc angle of a plurality of core pieces constituting the same annular core piece is different from the arc angle of other core pieces constituting the same annular core piece. A core punching part,
An apparatus for manufacturing a laminated core, comprising: a cradle that is rotated by a predetermined rotation angle each time the core piece is punched and the core pieces punched by the core piece punching portion are sequentially arranged in a ring shape.   The said punching part contains the cyclic | annular lamination crimping station which crimps and bonds the said core pieces which overlap in a lamination direction on a receiving stand, The manufacturing apparatus of the laminated core of Claim 10 characterized by the above-mentioned. The annular core piece includes i pieces of iron core pieces having n pieces of magnet attachment holes or coils to which magnets are attached, and one piece having (n + 1) pieces of magnet attachment holes or teeth portions. The laminated core according to claim 10 or 11, characterized in that a laminated core having a number m of magnet mounting holes or teeth in the circumferential direction is set in the circumferential direction. Iron core manufacturing equipment.
m = i × n + (n + 1) The annular core piece is provided with i pieces of iron core pieces including n pieces of magnet mounting holes or coils for mounting magnets, and (n-1) pieces of magnet mounting holes or teeth portions. 12. The laminated core according to claim 10 or 11, wherein the laminated core is configured by arranging one piece of iron core pieces side by side and having m magnet mounting holes or teeth portions set by the following formula in a circumferential direction. Manufacturing equipment for laminated iron cores.
m = i * n + (n-1) The laminated core manufacturing apparatus according to claim 12 or 13, wherein a rotation angle β of the cradle is set by the following equation.
β = 360 × (n / m)   The laminated iron core is an iron core for an annular rotor having 16 magnet mounting holes, and includes four core pieces each having three magnet mounting holes and one sheet having four magnet mounting holes. The apparatus for producing a laminated core according to claim 12, wherein the annular core pieces are configured by arranging the core pieces.   The laminated iron core is an iron core for an annular rotor having 15 magnet mounting holes, and is composed of three core pieces each having four magnet mounting holes and one sheet having three magnet mounting holes. The laminated core manufacturing apparatus according to claim 13, wherein the annular core pieces are configured by arranging core pieces.   The laminated iron core is an iron core for an annular stator having 24 teeth portions, and includes four iron core pieces having five teeth portions and one iron core piece having four teeth portions. The method for manufacturing a laminated core according to claim 13, wherein the annular core pieces are arranged side by side.   The said cradle is provided with two or more in the conveyance direction of the said to-be-processed board, It laminates | stacks on the said cradle, stamping out several iron core pieces from the same to-be-processed board simultaneously. The manufacturing apparatus of the laminated iron core of item 1. A laminated iron core manufactured by punching out the iron core pieces from a work plate conveyed in one direction, a laminated iron core obtained by laminating and fixing a plurality of annular iron core pieces composed of a plurality of iron core pieces arranged in a ring,
At least one arc angle of a plurality of core pieces constituting the same annular core piece is different from the arc angle of other core pieces constituting the same annular core piece, and the core pieces overlapping each other in the stacking direction are circumferentially A laminated iron core characterized by being shifted to   The laminated iron core according to claim 19, wherein the iron core pieces overlapping in the lamination direction are caulked. The annular core piece includes i pieces of iron core pieces having n pieces of magnet attachment holes or coils to which magnets are attached, and one piece having (n + 1) pieces of magnet attachment holes or teeth portions. The laminated iron core according to claim 19 or 20, wherein the laminated iron cores are arranged side by side and have m magnet mounting holes or teeth portions set in the circumferential direction according to the following formula.
m = i × n + (n + 1) The annular core piece is provided with i pieces of iron core pieces including n pieces of magnet mounting holes or coils for mounting magnets, and (n-1) pieces of magnet mounting holes or teeth portions. 21. The laminated iron core according to claim 19 or 20, wherein the laminated iron core is configured by arranging one piece of iron core pieces in a circumferential direction, and has m magnet mounting holes or teeth portions set by the following formula.
m = i * n + (n-1)   The laminated iron core is an iron core for an annular rotor having 16 magnet mounting holes, and includes four core pieces each having three magnet mounting holes and one sheet having four magnet mounting holes. The laminated core according to claim 21, comprising the annular core piece configured by arranging the core pieces side by side.   The laminated iron core is an iron core for an annular rotor having 15 magnet mounting holes, and is composed of three core pieces each having four magnet mounting holes and one sheet having three magnet mounting holes. The laminated core according to claim 22, comprising the annular core piece configured by arranging the core pieces side by side.   The laminated iron core is an iron core for an annular stator having 24 teeth portions, and includes four iron core pieces having five teeth portions and one iron core piece having four teeth portions. The laminated core according to claim 22, comprising the annular core pieces arranged side by side.

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