JP6498430B2 - Armature manufacturing method, conveying jig and dummy plate - Google Patents

Description

  The present invention relates to a method for manufacturing an armature including a permanent magnet, and a conveying jig and a dummy plate used in the manufacturing method.

  It is known to form an armature by forming a plurality of magnet insertion holes in a laminated iron core formed by laminating plate-like magnetic members and inserting permanent magnets into the respective magnet insertion holes. It is also known that after inserting a permanent magnet into a magnet insertion hole, a liquid resin is injected under pressure into the magnet insertion hole, and then the resin is cured to fix the permanent magnet to the laminated core ( For example, Patent Document 1).

  The pressure injection of the liquid resin is performed by sandwiching the laminated iron core between the upper mold and the lower mold of the resin filling device, and pressurizing and injecting the liquid resin into the magnet insertion hole via the upper mold or the lower mold. Performed (Patent Document 2, FIG. 1).

  The laminated iron core is placed on a conveying jig and conveyed, and is directly mounted on a resin filling device (for example, Patent Document 3). The conveying jig described in Patent Document 3 has a shaft at the center of the mounting plate, and a key groove is provided on the shaft. The keyway has a shape that engages with a linear protrusion that protrudes inside the shaft hole of the laminated iron core. Therefore, when placing the laminated iron core on the conveying jig, the laminated iron core is positioned with respect to the conveying jig by inserting the axis of the conveying jig into the shaft hole of the laminated iron core (Patent Document 3, paragraph 0023, Figure 2).

  In the resin filling apparatus, when the upper mold (or the lower mold) in which the resin flow path is formed is brought into direct contact with the surface of the laminated core, the resin member remains on the surface of the laminated core after the resin filling is completed. For this reason, a process for removing the resin member remaining on the surface is required after completion of the resin filling, which requires labor and time. Therefore, a dummy plate is disposed on the surface of the laminated core in contact with the upper die (or lower die) in which the resin flow path is formed, and the resin member is injected and cured through the resin injection hole of the dummy plate. A plate is removed from a laminated iron core (for example, Patent Document 4). The dummy plate is also called a cull plate (for example, Patent Document 5). Further, the “lid plate 22” of Patent Document 3 corresponds to a dummy plate (Patent Document 3, FIGS. 2, 4, and 5).

  Now, in the armature of the type in which the permanent magnet is inserted into the magnet insertion hole, the resin is filled in the magnet insertion hole, and the permanent magnet is fixed to the laminated iron core as described above, the permanent magnet can be easily inserted. Therefore, it is necessary to provide a gap between the magnet insertion hole and the permanent magnet. However, if such a gap is provided, the permanent magnet may be displaced from the normal position before and after the resin injection. Further, the permanent magnet may be fixed to the laminated iron core at the shifted position.

  If the permanent magnet is displaced from the normal position and fixed, the center of mass of the armature is shifted from the normal position. In this case, if the armature is a rotor, mechanical vibration occurs during rotation. Further, when the permanent magnet deviates from the normal position, the distribution of the magnetic field in the armature changes, so that the performance of the electric motor changes. In many cases, the performance of the motor is reduced.

  As means for solving this problem, Patent Document 6 discloses that when a liquid resin is pressurized and injected into a magnet insertion hole, a permanent magnet is pressed against the wall surface of the magnet insertion hole with the liquid pressure of the liquid resin. Yes.

JP 2002-34187 A JP 2006-2111865 A JP 2011-55687 A JP 2008-54376 A JP 2013-243863 A JP 2007-215301 A

  In the invention described in Patent Document 6, it is necessary to dispose the permanent magnet substantially at the center of the magnet insertion hole before injecting the liquid resin (Patent Document 6, paragraph 0041, FIG. 8). In this case, if the permanent magnet is not arranged at the substantially center of the magnet insertion hole, for example, when the permanent magnet is to be fixed at a position in contact with the wall surface on the outer diameter side of the magnet insertion hole, the permanent magnet is inserted into the magnet insertion hole. If it is made to contact | abut to the wall surface of the inner diameter side of this, a permanent magnet will be fixed in the position contact | abutted to the wall surface of the inner diameter side of a magnet insertion hole. This is because the hydraulic pressure does not act in the direction in which the permanent magnet is brought into contact with the wall surface on the outer diameter side of the magnet insertion hole. Further, if the permanent magnet is tilted in the magnet insertion hole, the permanent magnet only falls due to the liquid pressure of the liquid resin and does not move to the proper position.

  Regardless of whether it is performed by an operator or an automatic machine, it is difficult to place the permanent magnet almost at the center of the magnet insertion hole and erect it. Moreover, even if the permanent magnet is arranged almost in the center of the magnet insertion hole and can be erected, a disturbance is applied thereafter, and the permanent magnet moves to an unplanned side of the magnet insertion hole or tilts. There is also a possibility. Therefore, it is considered that it is considerably difficult to implement the invention described in Patent Document 6 so that the effect is actually produced.

  The present invention has been made under such a background, and an object of the present invention is to provide an armature manufacturing method capable of accurately and surely positioning and fixing a permanent magnet with respect to a laminated core. Moreover, it aims at providing the conveyance jig and dummy plate which are used in this manufacturing method.

In order to solve the above-described problem, an armature manufacturing method according to a first aspect of the present invention includes a permanent magnet inserted into a magnet insertion hole formed through a laminated iron core in the laminating direction, and the magnet A method of manufacturing an armature in which a resin member is filled between an insertion hole and the permanent magnet, and the permanent magnet is fixed to the laminated core, wherein the laminated core is placed on a conveying jig, and the laminated A laminated iron core placing step for positioning an iron core with respect to the conveying jig, and the permanent magnet is inserted into the magnet insertion hole of the laminated iron core placed on the conveying jig, and the permanent magnet is laminated. A permanent magnet insertion fitting step for positioning with respect to the iron core, and the laminated iron core placed on the conveying jig is attached to a resin filling device, and the magnet insertion hole of the laminated iron core from the end surface of the laminated iron core a resin filling step of pressure injecting the resin, when including bets In the permanent magnet insertion and fitting step, the permanent magnet is inserted and fitted into a magnet positioning recess that is recessed from the surface of the conveying jig that contacts the laminated core. It positions with respect to the said laminated iron core .

In the armature manufacturing method according to the second aspect of the present invention, a permanent magnet is inserted into a magnet insertion hole formed through a laminated iron core in the lamination direction, and the gap between the magnet insertion hole and the permanent magnet is determined. The armature is filled with a resin member, and the permanent magnet is fixed to the laminated core. The armature is mounted on a conveying jig, and the laminated iron core is mounted on the conveying jig. A laminated core placing step for positioning the permanent magnet, and a permanent magnet for positioning the permanent magnet relative to the laminated core by inserting the permanent magnet into the magnet insertion hole of the laminated core placed on the conveying jig. Insertion fitting process and resin in which the laminated iron core placed on the conveying jig is mounted on a resin filling device, and resin is injected under pressure from the end face of the laminated iron core into the magnet insertion hole of the laminated iron core a filling step, with including said permanent magnet insertion fitting In the process, the end of the permanent magnet is inserted and fitted into a magnet positioning portion formed on a lower dummy plate that is disposed below the laminated iron core and abuts the lower surface of the laminated iron core. It positions with respect to the said laminated iron core.

  The resin filling apparatus includes a pair of molds, and the pair of molds sandwiches the laminated core placed on the transfer jig, and the pair of molds is in contact with the laminated core. A magnet positioning part that fits the permanent magnet in a mold that comes into contact with the mold and positions the permanent magnet at a normal position with respect to the laminated core, and in the resin filling step, the end of the permanent magnet is disposed in the mold. You may make it fit in the said magnet positioning part of a type | mold.

  Between the permanent magnet insertion fitting step and the resin filling step, an upper surface dummy plate is placed above the laminated core and the upper surface dummy plate is brought into contact with the upper surface of the laminated core. You may make it have a process.

  The upper surface dummy plate includes a magnet positioning unit that fits the permanent magnet to position the permanent magnet at a normal position with respect to the laminated core, and in the upper surface dummy plate mounting step, the end of the permanent magnet A portion may be fitted into the magnet positioning portion of the upper surface dummy plate.

According to a third aspect of the present invention, there is provided a method for manufacturing an armature, comprising: inserting a permanent magnet into a magnet insertion hole formed by penetrating a laminated iron core in the laminating direction, and placing the permanent magnet between the magnet insertion hole and the permanent magnet. The armature is filled with a resin member, and the permanent magnet is fixed to the laminated core. The armature is mounted on a conveying jig, and the laminated iron core is mounted on the conveying jig. A laminated core placing step for positioning the permanent magnet, and a permanent magnet for positioning the permanent magnet relative to the laminated core by inserting the permanent magnet into the magnet insertion hole of the laminated core placed on the conveying jig. Insertion fitting process and resin in which the laminated iron core placed on the conveying jig is mounted on a resin filling device, and resin is injected under pressure from the end face of the laminated iron core into the magnet insertion hole of the laminated iron core a filling step, with including, after the resin filling process , Add another core on the end face of the laminated core, an end portion of the permanent magnet is one that has an additional laminating step of laminating to be lower than the end face of the laminated core.

  You may make it have the additional resin filling process which fills the clearance gap between the said magnet insertion hole of the iron core added by the said additional lamination process, and the said permanent magnet with the said resin.

  You may make it have a re-addition lamination process which adds another member to the end surface of the lamination iron core after the addition lamination process, and covers the magnet insertion hole of the lamination iron core.

In order to solve the above-described problem, a transport jig according to a fourth aspect of the present invention is a transport jig for placing a laminated core including a magnet insertion hole formed so as to penetrate in the stacking direction, A magnet positioning recess for positioning a laminated core and a permanent magnet mounted in the magnet insertion hole to position the permanent magnet at a normal position with respect to the laminated core ; those comprising a magnet positioning recess for recessed from surface contacting the laminated core.

In order to solve the above-mentioned problem, a dummy plate according to a fifth aspect of the present invention is a transport jig for placing a laminated core including a magnet insertion hole formed so as to penetrate in the laminating direction, A dummy plate that is placed together with the laminated core and covers an end surface of the laminated core on a conveying jig that includes an iron core positioning portion for positioning the iron core, the positioning hole for fitting with the core positioning portion, and the magnet insertion A magnet positioning recess that fits a permanent magnet mounted in a hole and positions the permanent magnet at a normal position with respect to the laminated core, and is a magnet positioning that is recessed from a surface that contacts the laminated core. those with a concave portion.

  According to the present invention, the permanent magnet is accurately positioned by simply fitting one end of the permanent magnet to the magnet positioning portion formed on the conveying jig. Can be positioned. Therefore, the armature can be manufactured easily.

It is sectional drawing which shows the state which mounted | wore the resin filling apparatus with the rotor core which concerns on embodiment of this invention. It is a top view of the rotor core which concerns on embodiment of this invention. It is an external view of the conveyance jig which concerns on embodiment of this invention, (a) is a front view, (b) is a top view. It is a top view of the upper surface dummy plate which concerns on embodiment of this invention. It is explanatory drawing which shows the process of the positioning and fixing of the permanent magnet in the rotor which concerns on embodiment of this invention, Comprising: It is a figure which shows this procedure in time series in (a)-(f). It is explanatory drawing which shows the additional lamination process of the rotor which concerns on embodiment of this invention. (A) is a figure which shows the state before additional lamination, (b)-(d) is a figure which shows the state after additional lamination. It is sectional drawing which shows another example of the state which mounted | wore the resin filling apparatus with the rotor core which concerns on embodiment of this invention. It is sectional drawing which shows another example of the state which mounted | wore the resin filling apparatus with the rotor core which concerns on embodiment of this invention. It is a top view of the lower surface dummy plate which concerns on embodiment of this invention. It is sectional drawing which shows another example of the state which mounted | wore the resin filling apparatus with the rotor core which concerns on embodiment of this invention. It is sectional drawing which shows another example of the state which mounted | wore the resin filling apparatus with the rotor core which concerns on embodiment of this invention. It is a top view which shows the modification of the planar shape of the recessed part for positioning which concerns on embodiment of this invention.

  FIG. 1 shows the use of a resin filling device 4 to pressurize a liquid resin into a rotor core 1 according to an embodiment of the present invention and cure the resin to form a resin member 10, thereby forming a permanent magnet. FIG. 6 is a cross-sectional view showing a state where 6 is fixed to the rotor core 1. As shown in FIG. 1, the rotor iron core 1 is mounted on the transporting jig 2 and mounted on the resin filling device 4 with its upper surface covered with the upper surface dummy plate 3. A positioning recess 8 is formed in the conveying jig 2, and a positioning recess 9 is formed in the upper dummy plate 3, and the end of the permanent magnet 6 is inserted and fitted into the positioning recess 8 and the positioning recess 9. And positioned with respect to the rotor core 1. The rotor core 1 is an example of the laminated core of the present invention.

  The resin filling device 4 is a device that pressurizes and injects liquid resin into the magnet insertion hole 5 of the rotor core 1 to form a resin member 10 between the magnet insertion hole 5 and the permanent magnet 6. 11 and a lower mold 12 are provided. The upper mold 11 and the lower mold 12 are examples of a pair of molds according to the present invention, and are molds that sandwich and press the rotor core 1, the conveying jig 2, and the upper surface dummy plate 3. The resin filling device 4 according to the present embodiment is configured to place the conveying jig 2 on the lower mold 12 and pressurize and inject liquid resin from the upper mold 11 to the rotor core 1. In order to avoid interference between the post 7 of the conveying jig 2 and the upper die 11, the center portion of the lower surface of the upper die 11 is recessed to form a relief hole 11 a.

  A resin reservoir pot 13 and a resin flow path 14 are formed in the upper mold 11, and a plunger 15 is attached to the resin reservoir pot 13. The resin reservoir pot 13 is a space in which resin is supplied from a supply source (not shown) and temporarily stored. The resin flow path 14 is a flow path that connects the resin reservoir pot 13 and the magnet insertion hole 5 of the rotor core 1. When the plunger 15 is operated by means not shown, the resin stored in the resin reservoir pot 13 is pressurized and flows into the magnet insertion hole 5 of the rotor core 1. The resin that has flowed into the magnet insertion hole 5 is then cured to form the resin member 10, and the permanent magnet 6 is fixed to the rotor core 1. An opening 16 is formed in the upper surface dummy plate 3, and the resin discharged from the resin flow path 14 flows into the magnet insertion hole 5 through the opening 16. Thus, in this embodiment, since resin is injected from the upper surface of the rotor core 1, the upper surface dummy plate 3 functions as an injection surface dummy plate that covers the resin injection surface of the rotor core 1.

  The rotor core 1 has a planar shape as shown in FIG. That is, a shaft hole 17 into which a rotating shaft of an electric motor (not shown) is inserted is formed at the center of the rotor core 1, and the shaft hole 17 is engaged with a key groove provided in the rotating shaft of the electric motor. It has. The rotor core 1 is formed with four magnet insertion holes 5 penetrating from the upper surface to the lower surface of the rotor core 1 and arranged at equal intervals on the circumference centered on the shaft hole 17. The magnet insertion hole 5 is a through hole into which the permanent magnet 6 is inserted, and has a size and a shape such that a gap is generated between the magnet insertion hole 5 and the permanent magnet 6. In addition to the magnet insertion hole 5, the rotor core 1 includes a through hole 19 that penetrates the rotor core 1 in the stacking direction. The through hole 19 is a hole that is filled with resin and fixes the plate-like members constituting the rotor core 1 to each other. The fixing means for the plate member will be described later. Note that FIG. 2 is a conceptual diagram, and illustration of detailed shapes unnecessary for the description of the present invention is omitted.

  The conveyance jig 2 includes a post 7 and a conveyance table 20 as shown in FIG. The post 7 has the same diameter as the rotary shaft of the electric motor, and includes a key groove 21 having the same shape as the key groove provided in the rotary shaft. Therefore, when the post 7 is inserted into the shaft hole 17 of the rotor core 1 and the rotor core 1 is placed on the transport jig 2, the rotor core 1 is correctly positioned with respect to the transport jig 2. Thus, the post 7 functions as an iron core positioning portion that positions the rotor core 1.

  The transport table 20 is a member that comes into contact with the lower surface (bottom surface) of the rotor core 1 when the rotor core 1 is placed on the transport jig 2, and as shown in FIG. In FIG. In addition, the positioning table 8 is provided with positioning recesses 8 on the basis of the posts 7 and the key grooves 21, and has substantially the same dimensions as the permanent magnets 6 in a planar shape. Therefore, when the permanent magnet 6 is fitted in the positioning recess 8, the permanent magnet 6 is correctly positioned with respect to the rotor core 1 in the horizontal plane. As described above, the positioning recess 8 functions as a magnet positioning unit that positions the permanent magnet 6 at a normal position with respect to the rotor core 1.

  The depth D of the positioning recess 8 shown in FIG. 3A is such that when the permanent magnet 6 is brought into contact with the bottom surface of the positioning recess 8, the permanent magnet 6 is in the height direction in the rotor core. 1 is set so as to be correctly positioned. That is, when the permanent magnet 6 is brought into contact with the bottom surface of the positioning recess 8, the tip of the permanent magnet 6 is designed to protrude from the bottom surface of the rotor core 1 according to the designed dimensions.

  As shown in FIG. 4, the upper surface dummy plate 3 is a disk-shaped member and includes a positioning recess 9. A shaft hole 22 and a key 23 are formed in the center of the upper surface dummy plate 3. The shaft hole 22 and the key 23 are respectively configured in the same shape as the shaft hole 17 and the key 18 of the rotor core 1, and when the post 7 of the conveying jig 2 is inserted into the shaft hole 17 of the rotor core 1, the upper surface dummy The plate 3 is correctly positioned with respect to the conveying jig 2. Further, the positioning concave portion 9 of the upper surface dummy plate 3 has a planar shape that is approximately the same size as the permanent magnet 6 and is disposed with reference to the shaft hole 22 and the key 23. Therefore, when the permanent magnet 6 is fitted into the positioning recess 9, the permanent magnet 6 is correctly positioned with respect to the rotor core 1. Thus, the positioning recess 9 functions as a magnet positioning portion that positions the permanent magnet 6 at a normal position with respect to the rotor core 1.

  The upper surface dummy plate 3 is a member that prevents the resin pressure-injected from the resin filling device 4 into the magnet insertion hole 5 of the rotor core 1 from touching the upper surface of the rotor core 1. be called. Here, the description of the action of the upper surface dummy plate 3 as a cull plate is omitted, so refer to Patent Documents 3 and 4 if necessary.

  Next, a procedure for positioning and fixing the permanent magnet 6 to the rotor core 1 using the conveying jig 2, the upper surface dummy plate 3, and the resin filling device 4 will be described with reference to FIG. First, as shown in FIG. 5A, the plate-like magnetic member 24 is punched out from an electromagnetic steel plate or the like, and these are laminated to manufacture the rotor core 1. Then, as shown in FIG. 5B, the rotor core 1 is placed on the transport jig 2. At this time, the rotor core 1 is positioned with respect to the transport jig 2 by inserting the post 7 of the transport jig 2 into the shaft hole 17 of the rotor core 1. Next, as shown in FIG. 5 (c), the permanent magnet 6 is inserted into the magnet insertion hole 5 and fitted into the positioning recess 8 of the conveying jig 2, and one end of the permanent magnet 6 (the lower end in the figure). ) Is brought into contact with the bottom surface of the positioning recess 8. At this time, the permanent magnet 6 is positioned with respect to the rotor core 1 and the conveying jig 2. Next, as shown in FIG. 5 (d), the upper surface dummy plate 3 is placed on the rotor core 1, and the other end (upper end in the drawing) of the permanent magnet 6 is positioned in the positioning recess of the upper surface dummy plate 3. 9, the tip of the permanent magnet 6 is brought into contact with the bottom surface of the positioning recess 9. Thereby, the permanent magnet 6 is supported by the upper surface dummy plate 3 and the conveying jig 2 at the upper end and the lower end, respectively. Therefore, the permanent magnet 6 is stably held with respect to the rotor core 1. When the above steps are completed, these are transferred to the resin filling device 4 and the rotor core 1 and the permanent magnet 6 are filled with the resin together with the transfer jig 2 and the upper surface dummy plate 3 as shown in FIG. Attach to device 4. Then, the plunger 15 is operated to inject liquid resin under pressure. At this time, as described above, both ends (upper and lower ends in the figure) of the permanent magnet 6 are both supported by the positioning concave portion 8 of the upper surface dummy plate 3 and the positioning concave portion 9 of the transport jig 2. Therefore, even if it receives the liquid pressure of resin, a position shift etc. do not arise. That is, the permanent magnet 6 is held at a regular position. When the resin is solidified, the state shown in FIG. 1 is obtained, and the permanent magnet 6 is fixed to the stator core 1. Finally, the rotor core 1 is removed from the resin filling device 4 and the conveying jig 2 and the upper surface dummy plate 3 are separated. Thus, the rotor 25 as shown in FIG.

  At the stage shown in FIG. 5 (f), the rotor 25 has been completed, so it can be used as it is as a component of the motor. However, in the rotor 25 at this stage, as shown in FIG. 6A, the tips of the permanent magnets 6 protrude from the upper and lower surfaces of the rotor core 1. The magnetic force generated by the exposed portion of the tip of the permanent magnet 6 does not work effectively in the rotor core 1. Therefore, a plate-like magnetic member 24 may be additionally laminated on the rotor core 1 so as to eliminate the protrusion at the tip of the permanent magnet 6. For example, as shown in FIG. 6B, if a plate-like magnetic member 24 is additionally laminated on the upper and lower surfaces of the rotor core 1, magnet insertion of the plate-like magnetic member 24 in which the tips of the permanent magnets 6 are additionally laminated is performed. Since it enters the hole 5, the magnetic force generated at the tip of the permanent magnet 6 can be used effectively. Alternatively, as shown in FIG. 6 (c), another plate-like member 24 ′ not provided with the magnet insertion hole 5 is additionally laminated on the outer side of the additionally laminated plate-like magnetic member 24, so that the permanent magnet 6 It may be made completely invisible from the outside of the rotor 25. The plate-like member 24 ′ is preferably a nonmagnetic material, but may be a magnetic material. Alternatively, as shown in FIG. 6D, the permanent magnet 6 may be buried under the resin 26 by filling the magnet insertion hole 5 of the additionally laminated plate-like magnetic member 24 with the resin 26.

  In the above description, an example in which the upper surface of the rotor core 1 is covered with the upper surface dummy plate 3 has been described. However, the upper surface dummy plate 3 may be omitted. For example, as shown in FIG. 7, the upper mold 11 may be provided with a positioning recess 27, and the tip of the permanent magnet 6 may be fitted into the positioning recess 27.

  In addition, in the above, the positioning recess 8 formed on the transport table 20 of the transport jig 2, the positioning recess 9 formed on the upper surface dummy plate 3, or the positioning recess 27 formed on the upper die 11, Although the example which is set as a magnet positioning part was shown, a magnet positioning part is not limited to these. For example, as shown in FIG. 8, a lower surface dummy plate 28 having a positioning recess 9 can be mounted on the lower surface of the rotor core 1, and the positioning recess 9 of the lower surface dummy plate 28 can function as a magnet positioning portion. .

  In the embodiment shown in FIG. 8, the resin is injected from the upper surface of the rotor core 1, that is, the upper surface of the rotor core 1 is used as the injection surface. Corresponds to the injection surface. Therefore, the lower dummy plate 28 functions as an anti-injection surface dummy plate that covers the anti-injection surface. Therefore, the lower surface dummy plate 28 does not require the opening 16 provided in the upper surface dummy plate 3. However, other morphological features are common to the upper surface dummy plate 3. That is, as shown in FIG. 9, the lower dummy plate 28 has a disk shape in a plan view, and has a shaft hole 22 and a key 23 formed in the center. The shaft hole 22 and the key 23 have the same shape as the shaft hole 17 and the key 18 of the rotor core 1, respectively. Therefore, when the post 7 of the conveying jig 2 is inserted into the shaft hole 17 of the rotor core 1, the lower dummy plate 28 is correctly positioned with respect to the conveying jig 2. Further, since the positioning concave portion 9 of the lower dummy plate 28 is also arranged based on the shaft hole 22 and the key 23, when the permanent magnet 6 is fitted into the positioning concave portion 9, the permanent magnet 6 becomes the rotor core 1. Correctly positioned.

  So far, the example in which the upper surface of the rotor core 1 is the injection surface, that is, the example in which the resin filling device 4 including the resin reservoir pot 13, the resin flow path 14, and the plunger 15 is used in the upper mold 11, has been described. The present invention is not limited to this. The lower surface of the rotor core 1 may be the injection surface. For example, as shown in FIG. 10, the lower mold 12 may include a resin reservoir pot 13, a resin flow path 14, and a plunger 15, and the transport jig 2 may be provided with an opening 16. In this case, since the upper surface dummy plate 3 functions as an anti-injection surface dummy plate, it is not necessary to provide the opening 16 in the upper surface dummy plate 3.

  Further, when the lower surface of the rotor core 1 is used as an injection surface, the lower surface of the rotor core 1 may be covered with a lower dummy plate 28 as shown in FIG. In this case, in order for the lower surface dummy plate 28 to function as an injection surface dummy plate, an opening 16 is provided in the lower surface dummy plate 28. Since the upper surface dummy plate 3 functions as a counter-injection surface dummy plate, it is not necessary to provide the opening 16 in the upper surface dummy plate 3.

  As shown in FIGS. 8, 10, and 11, when the positioning recess 9 is formed in the upper surface dummy plate 3 or the lower surface dummy plate 28 and the positioning recess 9 is used as a magnet positioning portion, the rotor core 1 When the shape is changed, or when the same resin filling device 4 is used to manufacture different types of armatures, it is possible to cope with this by simply changing the upper surface dummy plate 3 or the lower surface dummy plate 2. Therefore, design change and setup change are facilitated.

  The planar shape of the positioning concave portion 8 of the conveying jig 2, the positioning concave portion 9 of the upper dummy plate 3 and the lower dummy plate 28, and the positioning concave portion 27 of the upper die 11 are exactly the same as the planar shape of the permanent magnet 6. It is not limited to. For example, as shown in FIGS. 12A and 12B, “stolen” may be provided at the corners of the positioning recess 8 (9, 27).

  The above-described embodiments exemplify specific embodiments of the present invention and do not delimit the technical scope of the present invention. The present invention can be freely modified, applied or improved within the scope of the technical idea described in the claims.

   For example, in the above embodiment, the rotor core 1 is shown as a specific example of the armature core, and the rotor 25 is shown as a specific example of the armature. However, the application target of the present invention is not limited to the rotor. The present invention can be applied to the manufacture of all armatures including a stator.

  The means for fixing the plate-like magnetic members 24 to each other is not limited. For example, before the step shown in FIG. 5B, liquid resin may be injected into the through hole 19 by pressure and cured, or in the step shown in FIG. At the same time that the resin is injected under pressure, the resin may be injected under pressure into the through hole 19 and cured. The plate-like magnetic members 24 may be fixed to each other by the resin member 10 that is pressurized and injected into the magnet insertion hole 5 without being provided with the through hole 19. Alternatively, the plate-like magnetic members 24 may be caulked and joined together, or a joining means such as adhesion or welding may be used.

  The iron core positioning part provided in the conveying jig is not limited to the post part 7 shown in the above embodiment. Various designs are possible depending on the shape of the armature core. For example, it is possible to design a positioning portion that is disposed on the outer diameter side of the armature core and engages with the outer diameter side shape of the armature core. Moreover, when the process of fixing the laminated | stacked armature core mutually is provided before the process shown in FIG.5 (b), the height of the post | mailbox 7 can be made low. In this case, it is sufficient that the core positioning portion engages with a part of the laminated armature cores.

  The material of the dummy plates (the upper surface dummy plate 3 and the lower surface dummy plate 28) is not limited. It may be an electromagnetic steel plate, a stainless steel plate or an aluminum plate. You may give the coating which improves peelability to the surface which contact | connects resin.

  In the said embodiment, although the example which arrange | positions the permanent magnet 6 in the center of the magnet insertion hole 5 of the rotor core 1 in the planar form was shown, arrangement | positioning of the permanent magnet 6 in the magnet insertion hole 5 is not limited above. The permanent magnet 6 may be arranged at a position close to any side of the planar shape of the magnet insertion hole 5. Alternatively, a plurality of conveyance jigs 2 having different positioning recesses 8, for example, a conveyance jig 2 in which the positioning recesses 8 are arranged so that the permanent magnet 6 is positioned at the center of the magnet insertion hole 5, and a permanent magnet. It is also possible to prepare a conveying jig 2 in which positioning recesses 8 are arranged so that 6 is positioned at a position deviated toward the outer diameter side of the rotor core 1 in the magnet insertion hole 5 so that they are properly used as necessary. good.

  In the above embodiment, the positioning concave portion 9 is provided in the upper surface dummy plate 3 and the lower surface dummy plate 28 to form a magnet positioning portion. However, the positioning recess 9 penetrates the upper surface dummy plate 3 or the lower surface dummy plate 28. May be. That is, the magnet positioning part may be a through hole.

  The shapes and forms of the rotor core 1 and the rotor 25 shown in the above embodiment are examples, and the technical scope of the present invention depends on the shapes and forms shown in the rotor core 1 and the rotor 25. , Not limited. In particular, the number and arrangement of the permanent magnets 6 are merely examples.

  In the present specification, for example, “upper surface” and “lower surface” are expressions based on the vertical relationship when the rotor core 1 is placed in the state shown in FIG. 1, and do not indicate an absolute vertical relationship. Absent. That is, if the rotor core 1 is reversed, the “upper surface” and the “lower surface” are interchanged, and if the rotor core is turned over, the “upper surface” or the “lower surface” is expressed as, for example, “left end” or “right end”. The same applies to “upper mold” and “lower mold”.

DESCRIPTION OF SYMBOLS 1 Rotor core 2 Conveying jig 3 Upper surface dummy plate 4 Resin filling apparatus 5 Magnet insertion hole 6 Permanent magnet 7 Post 8 Positioning recessed part 9 Positioning recessed part 10 Resin member 11 Upper mold | type 11a relief hole 12 Lower mold | type 13 Resin reservoir pot 14 Resin flow path 15 Plunger 16 Opening 17 Shaft hole 18 Key 19 Through hole 20 Transport base 21 Key groove 22 Shaft hole 23 Key 24 Plate-like magnetic member 24 'Plate-like member 25 Rotor 26 Resin 27 Positioning recess 28 Lower surface dummy plate

Claims (10)

A permanent magnet is inserted into a magnet insertion hole formed so as to penetrate the laminated iron core in the lamination direction, and a resin member is filled between the magnet insertion hole and the permanent magnet, and the permanent magnet is placed in the laminated iron core. A method of manufacturing an armature to be fixed,
A laminated iron core placing step of placing the laminated iron core on a conveying jig and positioning the laminated iron core with respect to the conveying jig;
A permanent magnet insertion fitting step of inserting the permanent magnet into the magnet insertion hole of the laminated core placed on the conveying jig and positioning the permanent magnet with respect to the laminated core;
A resin filling step in which the laminated core placed on the conveying jig is attached to a resin filling device, and resin is injected under pressure from the end surface of the laminated core into the magnet insertion hole of the laminated core;
With including,
In the permanent magnet insertion and fitting step, the permanent magnet is inserted and fitted into a magnet positioning recess that is recessed from a surface of the conveying jig that contacts the laminated core, and the permanent magnet is laminated. Positioning with respect to the iron core
An armature manufacturing method characterized by the above . A permanent magnet is inserted into a magnet insertion hole formed so as to penetrate the laminated iron core in the lamination direction, and a resin member is filled between the magnet insertion hole and the permanent magnet, and the permanent magnet is placed in the laminated iron core. A method of manufacturing an armature to be fixed,
A laminated iron core placing step of placing the laminated iron core on a conveying jig and positioning the laminated iron core with respect to the conveying jig;
A permanent magnet insertion fitting step of inserting the permanent magnet into the magnet insertion hole of the laminated core placed on the conveying jig and positioning the permanent magnet with respect to the laminated core;
A resin filling step in which the laminated core placed on the conveying jig is attached to a resin filling device, and resin is injected under pressure from the end surface of the laminated core into the magnet insertion hole of the laminated core;
Including
In the permanent magnet insertion and fitting step, the end of the permanent magnet is inserted and fitted into a magnet positioning portion that is disposed below the laminated iron core and formed on the lower dummy plate that contacts the lower surface of the laminated iron core. Te method of that the armature be characterized by positioning the permanent magnet relative to the laminated core. The resin filling device includes a pair of molds, and sandwiches the laminated iron core placed on the transport jig with the pair of molds.
Among the pair of molds, a magnet positioning part that fits the permanent magnet to a mold that contacts the laminated core and positions the permanent magnet at a normal position with respect to the laminated core,
The armature manufacturing method according to claim 1 or 2 , wherein, in the resin filling step, an end portion of the permanent magnet is fitted into the magnet positioning portion of the mold. Between the permanent magnet insertion fitting step and the resin filling step,
3. The upper surface dummy plate placing step of placing an upper surface dummy plate above the laminated iron core and bringing the upper surface dummy plate into contact with the upper surface of the laminated iron core. The manufacturing method of the armature of description. The upper surface dummy plate includes a magnet positioning portion that fits the permanent magnet and positions the permanent magnet at a normal position with respect to the laminated core.
5. The armature manufacturing method according to claim 4 , wherein, in the upper surface dummy plate placing step, an end portion of the permanent magnet is fitted to the magnet positioning portion of the upper surface dummy plate. A permanent magnet is inserted into a magnet insertion hole formed so as to penetrate the laminated iron core in the lamination direction, and a resin member is filled between the magnet insertion hole and the permanent magnet, and the permanent magnet is placed in the laminated iron core. A method of manufacturing an armature to be fixed,
A laminated iron core placing step of placing the laminated iron core on a conveying jig and positioning the laminated iron core with respect to the conveying jig;
A permanent magnet insertion fitting step of inserting the permanent magnet into the magnet insertion hole of the laminated core placed on the conveying jig and positioning the permanent magnet with respect to the laminated core;
A resin filling step in which the laminated core placed on the conveying jig is attached to a resin filling device, and resin is injected under pressure from the end surface of the laminated core into the magnet insertion hole of the laminated core;
Including
After the resin filling step,
Add another core on the end face of the laminated core, the method of manufacturing that the armature be characterized in that the end portion of the permanent magnet has an additional laminating step of laminating to be lower than the end face of the laminated core . The armature manufacturing method according to claim 6 , further comprising an additional resin filling step of filling a gap between the magnet insertion hole of the iron core added in the additional lamination step and the permanent magnet with the resin. . After the additional laminating step, another member is added to the end face of the laminated iron core,
Method of manufacturing an armature according to claim 6 or claim 7, characterized in that it has a re additional layering step of the lid into the magnet insertion holes of the laminated core. A conveying jig for placing a laminated iron core having a magnet insertion hole formed so as to penetrate in the laminating direction,
A magnet positioning recess for positioning the laminated magnet core and a permanent magnet mounted in the magnet insertion hole to position the permanent magnet at a normal position with respect to the laminated core ; transfer jig comprising a magnet positioning recess for recessed from surface contacting with the laminated core. A conveying jig for placing a laminated iron core having a magnet insertion hole formed so as to penetrate in the laminating direction, wherein the laminated iron core is placed together with the laminated iron core on a conveying jig having an iron core positioning portion for positioning the laminated iron core. A dummy plate covering the end surface of the laminated core,
A positioning hole for fitting with the iron core positioning portion, and a magnet positioning recess for positioning the permanent magnet at a normal position with respect to the laminated iron core by fitting a permanent magnet mounted in the magnet insertion hole; dummy plate comprising a magnet positioning recess for recessed from surface contacting with the laminated core.

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