JP5735880B2 - Iron core manufacturing equipment - Google Patents

Description

  The present invention relates to an iron core manufacturing method and apparatus for manufacturing a laminated core in which each layer is composed of a single or a plurality of thin plate members.

  2. Description of the Related Art Conventionally, a motor core made of a laminated iron core in which several tens to several hundreds of annular thin plate members obtained by pressing an electromagnetic steel plate is known. 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 improve the yield, 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 laminated 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

  In the manufacturing process of the laminated core as described above, it is desired to speed up the operation from the viewpoint of manufacturing efficiency. Therefore, it is easy to speed up the punching process. On the other hand, in the case of the manufacturing apparatus disclosed in Patent Document 1, punching and stacking of the thin plate segments are performed by one apparatus, and therefore the punching operation speed must be matched to the stacking operation speed.

  However, the speed of laminating thin sheet segments in the lamination process (number of segments laminated in a fixed time) is only about half of the speed of punching thin sheet segments in the punching process (number of segments punched in a fixed time). Cannot be achieved. For this reason, it is difficult to increase the manufacturing efficiency by speeding up the punching and stacking.

  An object of this invention is to provide the manufacturing method and apparatus of a laminated core which can improve manufacturing efficiency, without being restrict | limited to the speed of a lamination process in view of the problem of this prior art.

The manufacturing method of the present invention is an iron core manufacturing method for manufacturing a laminated iron core in which each layer is composed of a single or a plurality of thin plate members, and a plurality of processing target portions in a belt-shaped iron core material are arranged at a first position and a second position. A transfer step of sequentially transferring, a forming step of forming the thin plate member and pushing it back to the iron core material by performing predetermined processing at each processing target portion at the first position, and a thin plate member pushed back to the iron core material And laminating the separated thin plate members by laminating at the second position and laminating the separated thin plate members, and the laminating step includes a plurality of the second positions along the transfer direction of the iron core material. The thin plate members are continuously provided at the respective locations, and the thin plate members are stacked at the same time, and in the transfer step, the iron core material is moved to the first position in accordance with the speed at which the thin plate members are formed in the forming step. The first stage of transport, and Wherein Ri Do from the second stage of a lamination process in accordance with the speed of laminating the thin plate members transferring the core material in the second position, the feeding amount of the core material of the second stage, the second position depending on the number of, and wherein said Rukoto is set larger than the feed amount of the core material of the first stage.

According to the manufacturing method of the present invention, the speed at which the iron core material is transferred in the transferring step is set to a first stage in which the iron core material is transferred to the first position, and the iron material is transferred to the second position. Dividing into two stages, the first stage is set according to the speed at which the thin plate member is formed in the forming process, and the second stage is set according to the speed at which the thin plate member is arranged at the position in the laminating process. Thus, the speed of the forming process including punching is not limited by the speed of the laminating process as in the prior art, and the speed of the punching forming process can be increased. As a result, the manufacturing efficiency can be improved.
Moreover, in the said lamination process, while continuously providing in several places along the transfer direction of an iron core material, while laminating | stacking the said thin plate member is performed simultaneously in each location, the feed amount of the said iron core material of the said 2nd step is In accordance with the number of the second positions, it is set to be larger than the feed amount of the iron core material in the first stage, so that the productivity of the laminated iron core is improved without increasing the processing speed in the lamination process. Can be made.

  In the manufacturing method of the present invention, when the thin plate member is a plurality of arc-shaped members constituting an annular laminated iron core, in the laminating step, the arc-shaped member that is separated and lowered every time the separation is performed Is received on a plurality of arc-shaped members constituting a single layer and rotated by a predetermined angle in the circumferential direction of the arc-shaped member, so that the sequentially descended arc-shaped members are brought into positions constituting the laminated core. By disposing, an annular laminated core can be manufactured by laminating arc-shaped members.

The manufacturing apparatus of the present invention is an iron core manufacturing apparatus that manufactures a laminated iron core in which each layer is composed of a single or a plurality of thin plate members, and a plurality of processing target portions in a strip-shaped iron core material are sequentially placed in first and second positions. A transfer means for transferring; a forming means for forming the thin plate member and pushing it back to the iron core material by performing predetermined processing at each processing target portion at the first position; and a thin plate member pushed back to the iron core material. Laminating means for depressing at the second position to separate from the iron core material and laminating the separated thin plate members, the laminating means being continuously provided at a plurality of locations along the transfer direction of the iron core material. The thin plate member is stacked at the same time at each location, and the transfer means transfers the iron core material to the first position in accordance with the speed at which the forming means forms the thin plate member. Means and the stacking hand Ri but Do from the second feeding means for transferring the core material in accordance with the speed of laminating the thin plate members to the second position, the feed amount of said core material of said second feeding means, said second position depending on the number, it characterized that you have been set larger than the feeding amount of said core material of said first feeding means.

  According to the manufacturing apparatus of the present invention, in the first feeding means, the forming means matches the speed at which the thin plate member is formed, and in the second feeding means, the stacking means matches the speed at which the thin plate member is arranged at the position. In addition, since the speed at which the iron core material is transferred is set, the processing in the forming means for performing punching as in the conventional method is limited to the processing speed in the laminating means as in the case of the manufacturing method. Accordingly, the punching process can be speeded up, and as a result, the manufacturing efficiency can be improved.

In addition, because of the structure of the device, the press load of the press device generally used for punching is large, and the press load of the press device used for stacking is small, so it is compared with the conventional manufacturing technology that performs punching and stacking with one device. And the manufacturing apparatus of this invention can be reduced in size as a whole, and manufacturing cost can also be reduced.
The laminating means is continuously provided at a plurality of locations along the transfer direction of the iron core material, and the thin plate members are laminated simultaneously at each location, and the feed amount of the iron core material of the second feeding means Is set to be larger than the feed amount of the iron core material of the first feeding means according to the number of the second positions, so that the productivity of the laminated iron core can be increased without increasing the processing speed in the lamination process. Can be improved.

  In the manufacturing apparatus of the present invention, when the thin plate member is a plurality of arcuate members constituting an annular laminated iron core, the laminating means separates and descends the arcuate member separated each time the separation is performed. A position where the arc-shaped members descending first are received on a plurality of arc-shaped members constituting a single layer and rotated by a predetermined angle in the circumferential direction of the arc-shaped members to form the laminated core. It is preferable to arrange in.

  Furthermore, the feeding speed of the iron core material by the transfer means can be made different between the first feeding means and the second feeding means. When the feed speed of the second feed means is slower than the feed speed of the first feed means 30, it is preferable that the second feed means gives the iron core material slack due to the speed difference.

The figure which shows a mode that an iron core material is processed by the iron core manufacturing apparatus which concerns on one Embodiment of this invention. Explanatory drawing of the principal part of the iron core manufacturing apparatus which processes the process of FIG. The figure which shows a mode that an arc-shaped member is couple | bonded with the cyclic | annular layer in the iron core manufacturing apparatus of FIG. The figure which shows the part of the circular-arc-shaped member pushed back by the iron core material in the flat pushing process performed by the iron core manufacturing apparatus of FIG. The figure which shows operation | movement of the apparatus from a press bottom dead center to a press top dead center in the half punching process by the apparatus of FIG. The figure which shows the operation | movement in the pushback process in the iron core manufacturing apparatus which concerns on other embodiment of this invention. The figure which shows the process in the case of manufacturing the laminated iron core in which each layer is comprised with the sheet member of 1 sheet.

  FIG. 1 shows a process in which an iron core material is processed by an iron core manufacturing apparatus according to an embodiment of the present invention. This iron core manufacturing apparatus is for manufacturing a stator core as a laminated core.

  In the laminated core, each layer is composed of a single (one) or a plurality of thin plate members, but this embodiment is a case where each layer is composed of three thin plate members. That is, in the laminated iron core, one circular layer 20 is constituted by three arc-shaped thin plate members (hereinafter referred to as arc-shaped members) 21 obtained by processing the belt-shaped iron core material 10, and a predetermined number of the annular layers 20 are formed. Manufactured by stacking and bonding.

  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. 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. Note that the number of arc-shaped members 21 constituting one annular layer 20 is not limited to three, and may be other numbers, for example, two, four, six, or the like. However, as the number increases, the yield improves, but the production speed decreases.

  As shown in FIG. 1, the iron core material 10 is formed on the arc-shaped member 21 through a plurality of processing steps while being fed at a predetermined feed pitch by a transfer means described later. In the processing step, a half-punch step A in which a part to be the arc-shaped member 21 is half-cut, a part to be the half-cut arc-shaped member 21 is pushed back to the iron core material 10 to completely cut it from the iron core material 10, A flat pressing process B for forming the arc-shaped member 21 and a separating process C for separating the arc-shaped member 21 pushed back to the iron core material 10 from the iron core material 10 and joining them on the lower annular layer 20 are included. In the present embodiment, the separation step C includes two steps that are simultaneously performed along the transfer direction of the iron core material 10, that is, the first separation step C1 and the second separation step C2, and each of these two separation steps is the present invention. This corresponds to the laminating step. Moreover, the half-punch process A and the flat pressing process B constitute the formation process in the present invention.

  However, prior to the half punching step A, the pilot holes 11 necessary for positioning the iron core material 10 in each processing step, the punching of the portion 22 that becomes the winding slot of the stator core, and the holes 23 used when the stator core is assembled to the motor Formation and formation of a half-drilled hole 24 for joining the arcuate member 21 by caulking are performed.

  FIG. 2 is an explanatory view of a main part of the iron core manufacturing apparatus. The iron core manufacturing apparatus includes a first feeding means 30 for transferring the iron core material 10 in accordance with the speed at which the arc-shaped member 21 is formed in the forming step, as a transferring means for intermittently sending the iron core material 10 in the Y direction. And a second feeding means 31 that transports the iron core material 10 in accordance with the speed at which the arc-shaped member 21 is separated and joined in the separation step.

  The first feeding means 30 feeds the iron core material 10 at a predetermined pitch to a first position where predetermined processing is performed on a plurality of processing target portions of the iron core material 10 in the forming step (first stage of the transfer process). It is comprised with the drive roller (illustration omitted) which moves the iron core material 10 with the speed of.

  Further, the second feeding means 31 is a pair of upper and lower guide rollers 32 for guiding the feeding of the iron core material 10 whose arc-shaped member 21 has been pushed back in the forming step, and for feeding the iron core material 10 to the downstream separation step. A pair of upper and lower drive rollers 33 are provided. The drive roller 33 pushes the arc-shaped member 21 pushed back to the iron core material 10 in the first separation step C1 and the second separation step C2 to separate the iron core material 10 from the iron core material 10 at a second position. Feeding at a speed slower than the feeding speed of the first feeding means 30 (second stage of the transfer process).

  Due to the speed difference between the first feeding means 30 and the second feeding means 31, a belt-like slack is provided for adjusting the deflection of the iron core material 10 that is bent between the guide roller 32 and the driving roller 33 as shown in the figure and preventing vibration. A guide 34 is installed. Thereby, the 2nd sending means 31 can give the iron core material 10 slack.

  Here, the feed speed of the iron core material 10 by the driving roller 33 of the second feed means 31 is one half of the feed speed of the first feed means 30, and the feed amount (pitch) of the second feed means 31 is the first. The feed amount of the feed means 30 is set to twice. Thereby, as shown in FIG. 1, the arc-shaped member 21 is simultaneously separated in the first separating step C1 and the second separating step C2 with respect to the iron core material 10 in which the arc-shaped member 21 is pushed back in the flat pushing step B. Can be combined. As a result, the productivity of the laminated core can be improved (in this embodiment, doubled) without increasing the processing speed in the separation step.

  For this reason, the iron core material 10 in which the arc-shaped member 21 is pushed back in the flat pushing process B is separated into every other arc-shaped member 21 in the first separation process C1 (separated portions are arc-shaped blank portions). In the state where the remaining arc-shaped members 21a are lined up every other one, the second arc-shaped member 21a is transferred to the second separation step C2, and the arc-shaped members 21a are sequentially separated and combined. The

  In this embodiment, the separation process is divided into two (two places) and performed simultaneously, but the separation process can be performed simultaneously at three or more places. In that case, the ratio of the feed speed and the feed amount (pitch) of the first feed means and the second feed means is determined according to the number of separation steps performed simultaneously.

  Referring to FIG. 2 again, the iron core manufacturing apparatus of the present embodiment includes a half punching means 40 that performs half punching in the half punching process A, a flat pressing means 50 that performs flat pressing in the flat pressing process B, and There are provided two pressing means 60a and 60b that perform separation and coupling in the first separation step C1 and the second separation step C2, respectively.

  Further, the iron core manufacturing apparatus includes the arcuate member 21 coupled by the pressing units 60a and 60b so that the arcuate member 21 coupled by the pressing units 60a and 60b is disposed at a position constituting the laminated core. A stacking guide 70 that holds and rotates is provided.

  The half punching means 40 includes a die 41 having a shape corresponding to the contour of the arcuate member 21 and a main punch that half-punches the die 41 by pushing the part that becomes the arcuate member 21 of the iron core material 10 into the die 41. 42 and a counter punch 43 for applying a counter load. The counter punch 43 applies an upward counter load against the pressing force of the main punch 42 against the lower surface of the iron core material 10 partly punched while the main punch 42 pushes the iron core material 10 into the die 41. To do. In order to generate the counter load, the counter punch 43 is urged upward by a disc spring or the like.

  The flat pushing means 50 includes a die plate 51 that holds the die 41 and a stripper plate 52 that holds the core material 10 and guides the main punch 42 when the main punch 42 performs half-punching.

  According to this configuration, when the main punch 42 is lowered to perform half punching in the half punching process A, the stripper plate 52 is also lowered. At this time, the flat pressing process in the flat pressing process B is performed by the die plate 51 and the stripper plate 52 on the portion 13 of the iron core material 10 that has already been half punched through the half punching process A. That is, the flat pushing process B is automatically performed in the idle process from the half punching process A to the separation process C.

  In the present embodiment, the half punching means 40 and the flat pushing means 50 constitute the forming means in the present invention.

  Each pressing means 60 a, 60 b includes a pressing member 61 that is guided in the vertical direction by the stripper plate 52. When the stripper plate 52 is lowered to press the iron core material 10 with the die plate 51 in order to perform half-punching in the half-punching step A, the pressing member 61 is lowered. At this time, the pressing member 61 presses and separates the arc-shaped member 21 pushed back in the flat pressing step B from the iron core material 10, and further joins the annular layer 20 supported on the lower laminated guide 70.

  The lamination guide 70 includes a cylindrical inner wall 71 along the outer periphery of each of the laminated annular layers 20 and a support member 72 that supports the laminated annular layers 20. The lamination guide 70 is supported so as to be rotatable around the central axis 73 integrally with the support member 72, and the rotation position is controlled by the rotation mechanism 74. The rotation mechanism 74 can be configured by a pulley fixed to the outer periphery of the laminated guide 70, a toothed belt that rotates the pulley, and the like.

  The position of the support member 72 in the vertical direction is controlled by a driving unit (not shown) in accordance with the number of stacked annular layers 20. That is, the support member 72 is controlled to rise to a predetermined position slightly below the upper surface of the die plate 51 in an initial state where the annular layer 20 is not laminated, and to descend as the number of laminated annular layers 20 increases. Is done. Thereby, the upper surface of the uppermost annular layer 20 that is supported is controlled so as to be positioned at the predetermined position.

  The lamination guide 70 is controlled to rotate by a predetermined angle around the central axis 73 every time the first and second separation steps C1 and C2 are performed. By this rotation, the arcuate member 21 supported by the lamination guide 70 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.

  In the present embodiment, the pressing means 60a, 60b and the stacking guide 70 constitute the stacking means in the present invention.

  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 same figure), it is further rotated by 120 ° ((d) in the same figure), and the next arcuate member 21c is received ((e) in the same 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.

  Next, the lamination guide 50 rotates 60 ° ((f) in the figure). At this time, the support member 72 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. .

  FIG. 4 shows a portion of the arcuate member 21 cut from the iron core material 10 and pushed back to the iron core material 10 in the flat pushing process B. In the figure, the arcuate member 21 has dovetail-shaped recesses 25 at two locations on the periphery. The arc-shaped member 21 is held by the iron core material 10 through contact of the contour portion of the arc-shaped member 21 that is in contact with the iron core material 10.

  The recess 25 has a function of improving the holding force. That is, the concave portion 25 prevents the arc-shaped member 21 from dropping from the iron core material 10 after the flat pressing process B is performed and before the arc-shaped member 21 is separated in the separating process. In particular, the thinner the iron core material 10 and the larger the arcuate member 21, the easier it is to drop off, so the recess 25 must be provided. Accordingly, the recess 25 is provided in a shape, size and position suitable for preventing such dropout. However, it is necessary to form on the outer side in the radial direction of the arc-shaped member 21 so as not to affect the performance of the laminated core.

  According to this embodiment, when manufacturing a laminated iron core, operation | movement of each part of an apparatus is controlled as follows by the control part and control mechanism of an apparatus which are not illustrated. That is, the iron core material 10 is fed in the Y direction at a predetermined feed pitch by the first feeding means 30. Further, the iron core material 10 is fed in the Y direction by the second feeding means 31 at a pitch different from the feeding pitch by the first feeding means 30 as described above. Thereby, each process object part on the iron core material 10 is sequentially transferred to each process position. Each processing position includes the above-described steps A, B, C1, and C2. Accurate positioning at each processing position is performed using the pilot hole 11.

  As shown in FIG. 1, the pilot hole 11, the winding slot portion 22, and the half punch hole 24 are provided for each processing target portion through a plurality of processing steps, and then sequentially in the processing steps A to C. Processing is performed. When performing the processing steps A to C, the stripper plate 52 moves up and down at a constant cycle. FIG. 2 shows a state in which the stripper plate 52 is lowered and the core material 12 is sandwiched between the die plate 51.

  In synchronization with the vertical movement of the stripper plate 52, the iron core material 10 is sequentially fed in the Y direction at a predetermined pitch. The iron core material 10 is fed when the stripper plate 52 is in the raised position. At this time, both side ends of the iron core material 10 are supported by a feed guide (not shown), and the iron core material 10 is fed in a state of being lifted from the die plate 51.

  In synchronization with the vertical movement of the stripper plate 52, the processing steps for different processing target portions on the iron core material 10 are performed in parallel at the processing positions Pa to Pc, as shown in FIG.

  5A to 5F show the operation of the apparatus from the press bottom dead center to the press top dead center in the half punching step A performed at the processing position Pa. In the processing position Pa, first, the main punch 42 and the stripper plate 52 are lowered integrally. When the stripper plate 52 is lowered, the feed guide lifting the iron core material 10 is also pushed down.

  When the stripper plate 52 sandwiches the iron core material 10 with the die 41, the main punch 42 protrudes from the stripper plate 52 against the counter load by the counter punch 43, and pushes the iron core material 10 into the die 41. As shown in FIG. The position of the bottom dead center is set so that about 20 to 30% of the thickness of the iron core material 10 remains without being cut.

  Thereby, it will be in the state by which the part 13 used as the circular-arc-shaped member 21 was half-punched. Next, the main punch 42 rises, the counter punch 43 returns to the original level, and the stripper plate 52 starts to rise (FIGS. (B) to (d)). Along with this, the feeding guide that has been pushed down also returns, and the iron core material 10 is lifted ((d) in the figure).

  Thereafter, the main punch 42 is further lifted together with the stripper plate 52 ((e) in the same figure), and when the top dead center is reached ((f) in the same figure), the feeding of the iron core material 10 is started. Thereby, the half blanking process by the process A is completed.

  At the processing position Pb, as shown in FIG. 2, the stripper plate 52 is lowered and flat pressing is performed to sandwich the iron core material 10 with the die plate 51. As a result, the portion 13 that has been half-cut in the processing step A is pushed back into the iron core material 10. Thereby, the half-extracted portion 13 is completely cut from the iron core material 10 and formed into an arc-shaped member 21. The arc-shaped member 21 pushed back is held by the iron core material 10 until it is separated from the iron core material 10 at the processing position Pc.

  At the processing position Pc in the two separation steps C1 and C2, when the stripper plate 52 is lowered and the iron core material 10 is pressed between the die plate 51, the arcuate member 21 fitted to the iron core material 10 is Pressed by the pressing member 61 and pressed onto the annular layer 20 supported by the lower laminated guide 70. As a result, the arc-shaped member 21 is separated from the iron core material 10 and joined to the annular layer 20.

  This coupling is performed by fitting the convex shape of the half punch hole 24 of the arcuate member 21 into the concave shape of the corresponding half punch hole 24 of the lower annular layer 20. However, the arcuate member 21 to be coupled is shifted by 60 ° with respect to the arcuate member 21 of the lower annular layer 20 as shown in FIG. , And these arcuate members 21 are combined.

  As shown in FIG. 3, the arcuate member 21 that is sequentially received by the lamination guide 70 is arranged and laminated at a position that constitutes the lamination core by the rotation of the lamination guide 70 and the vertical movement of the support member 72. The

  That is, when the combined arcuate member 21 is the first or second arcuate member 21 constituting one annular layer 20, the laminated guide 70 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 72 is made 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 Pc constitutes the first annular layer 20 in one laminated iron core, the half-cut hole 24 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 70 as laminated iron cores.

  According to this embodiment, the final separation step can be performed by simple control. In other words, in the past, in order to separate the arc-shaped member from the iron core material in the final process, cutting processing using a rotating die was performed, so the feed pitch of the iron core material and the rotational position of the die were determined. Must be controlled with high accuracy at the same time.

  On the other hand, in this embodiment, the arc-shaped member 21 is formed by pushing it back to the iron core material 10 by half punching and flat pressing, and thereafter, in the final process, the arc-shaped member 21 in the iron core material 10 is pressed. Therefore, it is not necessary to place a die, and the final process can be performed with simple control.

  In addition, compared to the conventional case in which most unnecessary portions are punched and removed in advance before reaching the final process, the arc-shaped member 21 pushed back to the iron core material 10 in the flat pressing process B leads to the final separation process C. Since the rigidity of the iron core material 10 is maintained to some extent, the width provided on both sides of the iron core material 10 can be reduced, and the yield can be improved. In addition, the process of punching out and removing unnecessary portions in advance is unnecessary, so that the production speed can be improved.

  FIG. 6 shows an operation in a pushback process in an iron core manufacturing apparatus according to another embodiment of the present invention. In this apparatus, this pushback process P is adopted in place of the above-described half punching process A and flat pushing process B, and the arc shaped member 21 is formed and pushed back to the iron core material 10 by this process P. ing. Therefore, this apparatus includes a structure for performing the pushback process P instead of the structure for performing the half-punch process A and the flat pushing process B. Other configurations and processes are the same as those in the embodiment shown in FIGS.

  As shown in FIG. 6, the iron core manufacturing apparatus of the present embodiment has a die 81 having a shape corresponding to the contour of the arcuate member 21 and a core material 10 relative to the die 81 as a configuration for performing the pushback process. When the main punch 82 performs punching, the main punch 82 that forms the arc-shaped member 21 by punching out the portion to be the arc-shaped member 21, the counter punch 83 that applies the counter load, and the core punch 82 10 and a stripper plate 84 that guides the main punch 82.

  The counter punch 83 applies an upward counter load against the pressing force of the main punch 82 to the lower surface of the core material 10 to be punched while the main punch 82 pushes the core material 10 into the die 81. In order to generate the counter load, the counter punch 83 is urged upward by a disc spring or the like.

  In the pushback process, first, the main punch 82 and the stripper plate 84 are lowered integrally. When the stripper plate 84 is lowered, the feed guide lifting the iron core material 10 is also pushed down.

  When the stripper plate 84 sandwiches the iron core material 10 with the die 81, the main punch 82 protrudes from the stripper plate 84 against the counter load by the counter punch 83, and pushes the iron core material 10 into the die 81. As shown in FIG.

  As a result, a portion to be the arcuate member 21 is punched out and formed in the arcuate member 21. Note that the position of the bottom dead center may be set so that the portion to be the arcuate member 21 is not completely punched and about 20 to 30% of the thickness of the iron core material 10 remains without being cut. Good.

  Next, the main punch 82 rises, and the counter punch 83 returns to the original level following this (FIG. 5B). Thereby, the formed arc-shaped member 21 is pushed back to the iron core material 10 and is held by the iron core material 10. As described above, when the position of the bottom dead center is set so that the portion to be the arc-shaped member 21 is in a half-blanked state, cutting of the portion is completed by this pushing back, and the arc-shaped member 21 is completed. Will be formed.

  When the main punch 82 is further raised ((c) in the figure), the stripper plate 84 also starts to rise ((d) in the figure). Along with this, the feeding guide that has been pushed down also returns, and the iron core material 10 is lifted ((d) in the figure).

  Thereafter, the main punch 82 is further lifted together with the stripper plate 84 (FIG. (E)), and when the top dead center is reached (FIG. (F)), the feeding of the iron core material 10 is started. This completes the pushback process. The arc-shaped member 21 pushed back to the iron core material 10 in the push-back process is separated from the iron core material 10 in the above-described separation process C, and is bonded onto the lower annular layer 20.

  Although the embodiment has been described above, the present invention is not limited to this, and can be appropriately modified and implemented. For example, although not mentioned in the above description, the coupling 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 half punching hole 24. FIG.

  In the embodiment, 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 the present invention can also be applied to the case where other laminated cores such as a rotor core are manufactured. Furthermore, the thin plate member constituting the laminated core is not limited to the arc shape, but is determined by the shape of the laminated core.

  Further, a laminated core composed of one thin plate member may be used. In this case, as shown in FIG. 7, the annular thin plate member 121 is punched and pushed back in the push-back process P with respect to the belt-shaped iron core material 110. After that, as in the embodiment of FIG. 1, the annular thin plate member 121 is separated at the same time in the first separation step C1 and the second separation step C2, and is laminated and bonded to the previously separated thin plate member 121, thereby forming an annular shape. The laminated iron core is manufactured. As a result, the productivity of the laminated core can be improved without increasing the processing speed in the separation step.

  DESCRIPTION OF SYMBOLS 10 ... Iron core material, 20 ... Cyclic layer, 21 ... Arc-shaped thin plate member, 30 ... 1st feeding means, 31 ... 2nd feeding means, 40 ... Half punching means, 41, 81 ... Die, 42, 82 ... Main punch, 43, 83 ... counter punch, 50 ... flat pushing means, 51 ... die plate, 52, 84 ... stripper plate, 60a, 60b ... pressing means, 61 ... pressing member, 70 ... lamination guide.

Claims (6)

An iron core manufacturing method for manufacturing a laminated core in which each layer is made of a single or a plurality of thin plate members,
A transfer step of sequentially transferring a plurality of parts to be processed in the belt-shaped iron core material to the first position and the second position;
Forming the thin plate member and pushing it back to the iron core material by performing predetermined processing at each processing target portion at the first position; and
A laminating step of depressing the thin plate member pushed back to the iron core material at the second position to separate it from the iron core material, and laminating the separated thin plate members;
In the laminating step, the second position is continuously provided at a plurality of locations along the transfer direction of the iron core material, and the laminating of the thin plate members is simultaneously performed at each location,
In the transfer step, the first step of transferring the iron core material to the first position in accordance with the speed of forming the thin plate member in the forming step, and the speed of stacking the thin plate member in the stacking step. Do a second step of transferring the core material in the second position Te Ri,
The feed amount of the core material of the second stage, the second based on the number of positions, the core manufacturing method characterized that you have been set larger than the feeding amount of the core material of the first stage. The thin plate member is an arc-shaped member constituting an annular laminated iron core,
In the laminating step, the arc-shaped member that is separated and lowered each time the separation is performed is received on a plurality of arc-shaped members that are first lowered and constitute one layer, and is predetermined in the circumferential direction of the arc-shaped member. The method of manufacturing an iron core according to claim 1, wherein the arc-shaped members that are sequentially lowered by being rotated by an angle are arranged at positions that constitute the laminated iron core. An iron core manufacturing apparatus for manufacturing a laminated core in which each layer is composed of a single or a plurality of thin plate members,
Transfer means for sequentially transferring a plurality of parts to be processed in the belt-shaped iron core material to the first and second positions;
Forming means for forming the thin plate member and pushing it back to the iron core material by performing predetermined processing at each processing target portion at the first position;
Laminating means for depressing the thin plate member pushed back to the iron core material at the second position to separate it from the iron core material, and laminating the separated thin plate members;
The laminating means is continuously provided at a plurality of locations along the transfer direction of the iron core material, and the lamination of the thin plate members is simultaneously performed at each location,
The transferring means includes a first feeding means for transferring the iron core material to the first position in accordance with a speed at which the forming means forms the thin plate member, and a speed at which the laminating means laminates the thin plate member. Ri Do from the second feeding means for transferring the core material in the second location combined,
Feed amount of said core material of said second feeding means, depending on the number of the second position, the iron core manufacturing characterized that you have been set larger than the feeding amount of said core material of said first feeding means apparatus. The thin plate member is an arc-shaped member constituting an annular laminated iron core,
The stacking means receives the arc-shaped member that is separated and lowered every time the separation is performed on a plurality of arc-shaped members that are first lowered and constitute one layer, and is predetermined in the circumferential direction of the arc-shaped member. 4. The iron core manufacturing apparatus according to claim 3, wherein the arc-shaped members that are sequentially lowered by being rotated by an angle are arranged at positions that constitute the laminated iron core. 5. The iron core manufacturing apparatus according to claim 3 , wherein the feeding speed of the iron core material by the transferring means is different between the first feeding means and the second feeding means . 6. 6. The iron core manufacturing apparatus according to claim 5 , wherein the feed speed of the second feed means is slower than the feed speed of the first feed means, and the iron core material is slackened due to the speed difference .

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