JP2012095368A - Core manufacturing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a core manufacturing device capable of easily improving a production speed.SOLUTION: This core manufacturing device for manufacturing an annular laminated core each layer of which is formed by a plurality of arc-like members 21 includes transfer means 30 for transferring each objective portion to be processed in a core material to a prescribed processing position F one by one, processing means 40 for separating the arc-like member from each objective portion to be processed by a shearing process by a die 41 and a punch 42 at the processing position, and a lamination guide 50 for disposing each arc-like member at a position for forming the laminated core by receiving the descending arc-like member and rotating it by a prescribed angle in its circumferential direction every time the shearing process is carried out.

Description

  The present invention relates to an iron core manufacturing apparatus for manufacturing an annular laminated iron core in which each layer is composed of a plurality of arcuate members.

  2. Description of the Related Art Conventionally, there is known a motor core in which dozens to hundreds of annular thin plate members obtained by pressing a magnetic steel sheet are laminated and manufactured as a laminated core. The thickness of the thin plate member is about 0.15 to 0.5 mm, and the thinner the plate member, the better the energy efficiency. Furthermore, in order to use the motor core material efficiently, an annular thin plate member is constituted by a plurality of arc-shaped thin plate members.

  For example, Patent Document 1 describes an apparatus for manufacturing a stratified iron core by forming a single annular thin plate member by a plurality of arc-shaped thin plate segments and laminating and bonding a large number of them. The central angle of the arc-shaped thin plate segment is 360 ° / n, and one thin thin plate member is constituted by n thin plate segments. The annular thin plate members of the adjacent layers are laminated so that the respective arc-shaped thin plate segments constituting them are shifted and overlapped like bricks.

  In this apparatus, the thin plate segment is punched into a mother die by a press machine. If the above-mentioned n is 3, the punched thin plate segment is rotated 120 ° in the circumferential direction by the rotation of the mother die. Then, the next thin plate segment is punched out. The punched sheet segments are joined together with other adjacent sheet segments. Thus, when one annular thin plate member is constituted by the three thin plate segments, after the master mold is rotated by 60 °, the annular thin plate member of the next layer is formed on the thin plate member. Is configured in the same manner.

  According to this, since the punching of the thin plate segments and the lamination of the thin plate members are performed by the mechanism that rotates the mother die, the manufacturing apparatus for the stratified core can be configured in a compact manner.

Japanese Patent No. 3634801

  However, according to the above-described laminated core manufacturing apparatus, since the mother die is rotated every time the thin plate segment is punched, it takes a certain time to rotate and position the mother die, thereby improving the production speed. There is a problem that is difficult.

  An object of the present invention is to provide an iron core manufacturing apparatus capable of easily improving the production speed in view of the problems of the prior art.

  In order to achieve this object, an iron core manufacturing apparatus according to the present invention is an iron core manufacturing apparatus for manufacturing an annular laminated core in which each layer is composed of a plurality of arc-shaped members, and a plurality of parts to be processed in a belt-shaped iron core material Are sequentially transferred to a predetermined processing position, processing means for separating the arc-shaped member from each processing target portion by shearing at the processing position, and a circle that is separated and lowered each time the shearing is performed. The arc-shaped member is first lowered and received on a plurality of arc-shaped members constituting one layer, and the arc-shaped member that is sequentially lowered by rotating the arc-shaped member by a predetermined angle in the circumferential direction of the arc-shaped member. And laminating means arranged at a position that constitutes.

  According to this, the arcuate member is sheared and lowered at the processing position and is received by the laminating means. Then, the arcuate member is arranged by rotating the stacking means. In other words, the rotating means is rotated instead of rotating the conventional large mold of inertia, so that it can be rotated and positioned much faster than the device of the prior patent, and the production speed of the laminated core is improved. Can do.

It is a figure which shows a mode that a laminated iron core is manufactured with the iron core manufacturing apparatus which concerns on one Embodiment of this invention. It is sectional drawing which cut | disconnected the part of the lamination | stacking guide and cutting | disconnection means of the iron core manufacturing apparatus of FIG. 1 by the II-II line of FIG. It is a figure which shows a mode that a cyclic | annular layer is formed in the iron core manufacturing apparatus of FIG. It is sectional drawing of the cutting | disconnection means and lamination | stacking guide part in the conventional iron core manufacturing apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows how a laminated core is manufactured by an iron core manufacturing apparatus according to an embodiment of the present invention. This laminated iron core is used as a stator core. As shown in the figure, this laminated iron core is formed by forming one annular layer 20 by three arc-shaped members 21 obtained by processing a belt-like iron core material 10 and laminating a predetermined number of annular layers 20. Manufactured.

  As shown in the figure, the iron core manufacturing apparatus intermittently feeds the iron core material 10 at a predetermined feed pitch in the Y direction so that each processing target portion on the iron core material 10 is sequentially positioned at each machining position A to F. Feeding means 30 and cutting means 40 for forming the arcuate member 21 by cutting at the last processing position F and coupling it to the annular layer 20 located below are provided.

  The iron core material 10 is obtained by thinly processing a magnetic steel sheet into a strip shape, and has a certain thickness. The plate thickness is about 0.15 to 0.5 mm. Each processing target portion on the iron core material 10 is sequentially transferred to each processing position A to F by the feeding means 30, subjected to predetermined processing, and used for forming the arc-shaped member 21.

  The central angle of the arc-shaped member 21 is 120 °. Accordingly, the circular layer 20 for one layer of the laminated iron core is constituted by the three arc-shaped members 21. The laminated iron core is configured by laminating a predetermined number of annular layers 20. The number of arc-shaped members 21 constituting one annular layer 20 is not limited to three, and may be other numbers such as two, four, six, and the like. However, as the number increases, the yield improves, but the production speed decreases.

  FIG. 2 is a cross-sectional view taken along the line II-II in FIG. As shown in the figure, the iron core manufacturing apparatus has a circumferential rotational position of the annular layer 20 so that the arc-shaped member 21 is joined to the appropriate position on the lower annular layer 20 by the cutting means 40. A lamination guide 50 is provided for controlling the above.

  The cutting means 40 separates the hatched portion 22 shown in FIG. 1 from the iron core material 10 by pressing the iron core material 10 into the die 41 and the die 41 that supports the iron core material 10. Are finally formed, and a stripper plate 43 that holds the iron core material 10 when the punch 42 is cut.

  The punch 42 also has a function of pressing and coupling the separated arc-shaped member 21 onto the lower annular layer 20 as it is. The die 41 is held by a die plate 44 and fixed at a certain position.

  Reference numeral 60 in the drawing denotes a rotation mechanism that rotates the stacking guide 50 by a predetermined angle in synchronization with the cutting process by the punch 42. The stacking guide 50 includes a cylindrical inner wall 51 and is rotatably supported around a central axis 52 thereof. The cylindrical side wall at the top of the stacking guide 50 is supported by the die plate 44 via the bearing 54. The rotation mechanism 60 can be configured by a pulley 61 fixed to the outer periphery of the laminated guide 50, a toothed belt (not shown) that rotates the pulley 61, and the like.

  The stacking guide 50 includes a support member 53 that rotates integrally with the stacking guide 50 and moves up and down by driving means (not shown). The support member 53 supports the annular layer 20 constituted by the arcuate member 21 cut by the cutting means 40, and the vertical position is controlled according to the number of laminated annular layers 20.

  That is, in the initial state where the annular layer 20 is not laminated, the support surface 53a of the support member 53 rises to a position near the lower end of the cutting edge surface 41a of the die 41 and descends as the number of laminations of the annular layer 20 increases. Thus, the position of the support member 53 is controlled. Thus, the position of the uppermost annular layer 20 supported by the support member 53 is controlled so as to always be a predetermined position near the lower end of the cutting edge surface 41a.

  The lamination guide 50 is controlled to rotate by a predetermined angle around the central axis 52 every time the arcuate member 21 is separated. By this rotation, the arcuate member 21 supported by the lamination guide 50 is also rotated by a predetermined angle in the circumferential direction. This rotation is performed so that the arc-shaped member 21 that is sequentially coupled to the uppermost annular layer 20 is disposed at a position that constitutes the laminated iron core.

  FIG. 3 shows how the annular layer 20 is formed. As shown in the figure, one annular layer 20 (20i) is composed of three arcuate members 21 (21a to 21c) (Fig. 5 (e)), and the arcuate members 21 overlap in a brick shape. As described above, the rotation at the predetermined angle is performed by repeating the rotation twice at 120 ° ((b) and (d) in the figure) and once at 60 ° ((f) in the same figure).

  That is, when the laminated guide 50 receives the first arcuate member 21a constituting the i-th annular layer 20i on the i-1-th annular layer 20i-1, the stacking guide 50 rotates by 120 °. (FIG. (B)). When the next arcuate member 21b is received ((c) in the figure), it is further rotated by 120 ° ((d) in the figure), and the next arcuate member 21c is received ((d) in the figure). Thereby, arrangement | positioning of the three circular-arc-shaped members 21a-21c with respect to the position which comprises the i-th cyclic | annular layer 20i is completed (the figure (e)).

  Next, the lamination guide 50 rotates 60 ° ((f) in the figure). At this time, the support member 53 is lowered by the thickness of one annular layer 20. Thereafter, in the same manner as in FIG. 6A, the arcuate member 21d for forming the next i + 1-th annular layer 20 is received (FIG. 5G). In this way, each circular layer 20 is configured by three arc-shaped members 21 and the arc-shaped members 21 are arranged so that each arc-shaped member 21 forms a laminated iron core that is stacked in a brick pile shape. .

  When the laminated iron core is manufactured, as shown in FIG. 1, the iron core material 10 is fed in the Y direction by a feeding means 30 at a predetermined feeding pitch. Thereby, each process object part on the iron core material 10 is sequentially transferred to each process position AF. The following processing is performed at each processing position A to F.

  At the processing position A, pilot holes 11 serving as a reference for positioning each processing target portion are provided on the iron core material 10. The pilot hole 11 is used for accurate positioning of each processing target portion at each of the subsequent processing positions B to F.

  In the processing position B, a half punching hole 23 for connecting the arcuate member 21 to the annular layer 20 by caulking is provided. The half punched hole 23 constitutes a concave portion on the upper surface side of the iron core material 10 and a convex portion on the lower surface side. That is, the arcuate member 21 that overlaps the upper and lower portions is joined by fitting the convex portions and concave portions of the upper and lower half punched holes 23 together.

  A plurality of half-cut holes 23 are provided at equal intervals along the circumferential direction of the portion to be the arcuate member 21. However, as shown in FIG. 3G, the positions of the half-cut holes 23 of the arc-shaped members 21 in the upper and lower annular layers 20 coincide with each other at a position shifted by 60 ° in the circumferential direction, and the upper and lower annular layers 20 are joined. For example, four half-cut holes 23 are arranged at intervals of 30 ° in the circumferential direction at the same radial position.

  In the processing position C, a portion constituting the winding slot 24 is provided by punching. In the next processing position D, the unnecessary portion 25 between the adjacent processing target portions is removed by punching. Further, at the processing position E, a slit 26 that defines an edge in the circumferential direction of the arc-shaped member 21 is provided.

  At the last processing position F, the cutting means 40 separates both ends of the portion 22 that becomes the arc-shaped member 21 from the iron core material 10 by the die 41 and the punch 42. The arcuate member 21 thus formed is pushed down by the punch 42 as it is and pressed onto the uppermost annular layer 20 already supported on the lamination guide 50.

  As a result, the formed arc-shaped member 21 is caulked and joined to the annular layer 20 directly below via the half-cut hole 23. However, since the arcuate member 21 to be coupled is shifted by 60 ° with respect to the lower arcuate member 21 as shown in FIG. 3G, these circles straddle the two lower arcuate members 21. Combined with the arcuate member 21.

  In this manner, the arcuate member 21 that is sequentially received by the lamination guide 50 at the processing position F is arranged at a position that constitutes the lamination core by the rotation of the lamination guide 50 and the vertical movement of the support member 53 as shown in FIG. And stacked.

  That is, when the combined arcuate member 21 is the first or second arcuate member 21 constituting one annular layer 20, the lamination guide 50 receives the arcuate member 21. , 120 ° (FIGS. 3A to 3D). In the case of the third arcuate member 21, the next arcuate member 21 is rotated by 60 ° so that the next arcuate member 21 is shifted by 60 ° and stacked like a brick pile, and the support member 53 is formed by the thickness of the annular layer 20. Is lowered (FIGS. 3E and 3F).

  When the arc-shaped member 21 cut off at the processing position F constitutes the first annular layer 20 in one laminated iron core, the half-cut hole 23 of the arc-shaped member 21 is replaced with the half-cut hole. Instead, by forming it as a through hole, it is possible to avoid the formation of an unnecessary convex portion at the lower end of the laminated iron core.

  In this way, when the lamination of several tens to several hundreds of annular layers 20 is completed, the laminated annular layers 20 are taken out from the lamination guide 50 as laminated iron cores.

  FIG. 4 is a sectional view of a conventional cutting means 80 and lamination guide 70 corresponding to the cutting means 40 and the lamination guide 50. The cutting means 80 includes a die 81 and a punch 82 for cutting the arcuate member 21 from the iron core material 10. The die 81 is held integrally with the lamination guide 70 so that it can rotate around the central axis 72 integrally with the lamination guide 70.

  The die 81 and the lamination guide 70 rotate integrally, and the arcuate member 21 cut off by the punch 82 is pushed into the die 81 and rotates together with the die 81. Therefore, as the die 81, a die provided with separate cutting blades for cutting the three arc-shaped members 21 constituting one annular layer 20 is used.

  Therefore, the rotation mechanism 60 needs to rotate the stacking guide 70 integrally with the heavy die 81 and position a separate cutting edge of the die 81 at a rotation position corresponding to the punch 82. In other words, it is necessary to control the rotation against a large inertia. This inertia becomes large especially when a core of a large motor is manufactured, which causes a reduction in production speed.

  On the other hand, in this embodiment, the die 41 is held by the die plate 44 and fixed at a fixed position. And only the lamination guide 50 which can be comprised with a comparatively light material is rotated. For this reason, the inertia to be controlled is much smaller than in the past. Therefore, the positioning speed of the laminated guide 50 is higher than the conventional one.

  As described above, according to the present embodiment, since the die 41 is fixed at a fixed position and only the lamination guide 50 is rotated, the positioning speed of the lamination guide 50 can be improved and the production speed can be improved. it can. Moreover, since the die 41 does not need to be provided with separate cutting blades for cutting each of the three arc-shaped members 21 constituting one annular layer 20, the device configuration is simplified. can do.

  Note that the present invention is not limited to the above-described embodiment, and can be implemented with appropriate modifications. For example, although not mentioned above, the connection between the annular layers 20 may be strengthened by welding with a laser beam. Moreover, you may make it perform the coupling | bonding between each cyclic | annular layer 20 by adhere | attaching with an adhesive agent instead of performing by caulking using the punching hole 23. FIG.

  Further, in the above description, predetermined processing is sequentially performed at a plurality of processing positions, and at the final processing position F, the arc-shaped member 21 is formed by cutting both ends of the portion that becomes the arc-shaped member 21 by cutting. However, instead of this, the arcuate member 21 may be formed by punching at the last machining position.

  In the above description, the case where the stator core is manufactured as a laminated core has been described. However, the present invention is not limited to this and can be applied to the case where other laminated cores such as a rotor core are manufactured.

  DESCRIPTION OF SYMBOLS 10 ... Iron core material, 20 ... Cyclic layer, 21 ... Arc-shaped member, 30 ... Feed means (transfer means), 40 ... Cutting means, 41 ... Die, 42 ... Punch, 50 ... Laminate guide.

Claims (1)

An iron core manufacturing apparatus for manufacturing an annular laminated core composed of a plurality of arc-shaped members in each layer,
Transfer means for sequentially transferring a plurality of parts to be processed in the belt-shaped iron core material to a predetermined processing position;
Processing means for separating the arc-shaped member from each processing target portion by shearing at the processing position;
Each time the shearing process is performed, the separated and descending arc-shaped member is received on the plurality of arc-shaped members that are first lowered and constitute one layer, and rotated by a predetermined angle in the circumferential direction of the arc-shaped member. Thus, an iron core manufacturing apparatus comprising: a laminating unit that arranges the arc-shaped members that are sequentially lowered at positions that constitute the laminated iron core.

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