Manufacturing device and manufacturing method for laminated iron core
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2026-02-05
- Publication Date
- 2026-08-13
Smart Images
Figure JP2026004227_13082026_PF_FP_ABST
Abstract
Description
Manufacturing Apparatus and Method for Laminated Core
[0001] The present invention relates to a manufacturing apparatus and method for a laminated core for manufacturing a core plate by punching from a steel sheet and manufacturing a laminated core using the core plate.
[0002] For a core or a stator core used in a rotating electric machine, a laminated core in which a predetermined number of core plates are laminated is used. The core plates are joined to each other by various methods. When caulking and welding are used as joining methods, the magnetic properties of the laminated core may deteriorate due to mechanical stress or thermal stress during joining and interlayer short circuit, and the performance of the laminated core may not be fully exhibited. Therefore, as shown in Patent Document 1 below, etc., laminating and bonding the core plates has been explored.
[0003] Patent Document 1 describes a manufacturing apparatus for a laminated core, which has an upper die and a lower die, a progressive die means for sequentially punching core plates from a strip-shaped thin steel sheet that is intermittently transferred, and an adhesive application device incorporated in the lower die for applying an adhesive to a portion corresponding to the core plate of the strip-shaped thin steel sheet. The adhesive application device has an adhesive discharge portion including a nozzle block having a plurality of discharge holes opened on the upper surface, and an adhesive supply portion for discharging the adhesive from the plurality of discharge holes by supplying the adhesive to the adhesive discharge portion at a predetermined pressure. Further, a forward and backward drive portion for moving the adhesive discharge portion forward and backward with respect to the adhesive application surface of the strip-shaped thin steel sheet is incorporated in the lower die together with the adhesive application device. By advancing and retreating the adhesive discharge portion by the forward and backward drive portion, the execution or non-execution of the adhesive application process by the adhesive discharge portion is switched. At the position of the core plate where the adhesive is not applied, a laminated core composed of a predetermined number of core plates is separated from the core plate group.
[0004] Japanese Patent Application Laid-Open No. 2017-216873
[0005] In the conventional configuration disclosed in Patent Document 1, since the forward and backward drive portion is incorporated in the lower die together with the adhesive application device, a large space is required in the lower die, and there is a risk that the die strength is reduced and the punching accuracy is reduced.
[0006] The present invention was made to solve the above-mentioned problems, and one of its objectives is to provide a manufacturing apparatus and method for laminated iron cores that can reduce the risk of a decrease in die strength and a decrease in punching accuracy.
[0007] In one embodiment, the laminated core manufacturing apparatus according to the present invention is a laminated core manufacturing apparatus for punching out core plates from a steel sheet and manufacturing a laminated core using the core plates, comprising: an adhesive application apparatus for applying adhesive to the portion of the steel sheet corresponding to the core plate; a mold comprising an upper mold and a lower mold, for punching out the core plate from the steel sheet after the adhesive application by the adhesive application apparatus; and a drive device for displacing the adhesive application apparatus relative to the steel sheet to switch whether or not to perform adhesive application, wherein the adhesive application apparatus is provided on either the upper mold or the lower mold, and the drive device is provided on the other of the upper mold and the lower mold.
[0008] In one embodiment, the method for manufacturing a laminated iron core according to the present invention includes manufacturing a laminated iron core using the above-described laminated iron core manufacturing apparatus.
[0009] According to one embodiment of the manufacturing apparatus and manufacturing method for laminated iron cores of the present invention, the adhesive application device is provided on either the upper mold or the lower mold, and the drive device is provided on the other of the upper mold or the lower mold, thereby reducing the risk of a decrease in mold strength and a decrease in punching accuracy.
[0010] This is an explanatory diagram showing a manufacturing apparatus for laminated iron cores according to an embodiment of the present invention. This is an explanatory diagram showing the drive device of Figure 1 in more detail. This is a perspective view showing the operating pin and guide member of Figure 2. This is an explanatory diagram showing a first modified example of the guide member of Figure 2. This is an explanatory diagram showing a second modified example of the guide member of Figure 2. This is an explanatory diagram showing a third modified example of the guide member of Figure 2. This is a perspective view showing the guide member and base of Figure 6. This is an explanatory diagram showing a fourth modified example of the guide member of Figure 2. This is a perspective view showing the guide member and base of Figure 8. This is an explanatory diagram showing an example of the connection between the operating pin and the second cam member of Figure 2. This is an explanatory diagram showing a modified example of the absorbent member of Figure 10.
[0011] Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The present invention is not limited to each embodiment, and can be materialized by modifying the components without departing from the spirit of the invention. Furthermore, various inventions can be formed by appropriately combining the multiple components disclosed in each embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, components from different embodiments may be appropriately combined.
[0012] Figure 1 is an explanatory diagram showing a manufacturing apparatus 1 for laminated iron core 4 according to an embodiment of the present invention. The manufacturing apparatus 1 shown in Figure 1 is an apparatus for punching out an iron core plate 3 from a steel plate 2 and manufacturing a laminated iron core 4 using the iron core plate 3.
[0013] As shown in Figure 1, the manufacturing apparatus 1 of this embodiment includes a reel 10, a feeding device 11, an oiling device 12, and a press machine 13. A coil of steel sheet 2 is mounted on the reel 10. The steel sheet 2 drawn from the reel 10 is sent to the press machine 13 through the feeding device 11. The oiling device 12 is positioned between the feeding device 11 and the press machine 13 and supplies press oil to the surface of the steel sheet 2 before it is introduced into the press machine 13. The press machine 13 includes an upper die 130 and a lower die 131, which punch out the iron core plate 3 from the steel sheet 2.
[0014] The manufacturing apparatus 1 of this embodiment includes an adhesive application device 14, a mold 15, a lamination section 16, and a separation section 17.
[0015] The adhesive application device 14 applies adhesive to the portion of the steel plate 2 corresponding to the core plate 3. In this embodiment, the adhesive application device 14 is provided on the lower mold 131 and applies adhesive to the lower surface of the steel plate 2. A liquid supply device 140 is connected to the adhesive application device 14, and the adhesive application device 14 applies adhesive from the liquid supply device 140.
[0016] The die 15 punches out the core plate 3 from the steel plate 2. The die 15 includes an upper die 130 and a lower die 131. The punching of the steel plate 2 by the die 15 is carried out in multiple stages. That is, the steel plate 2 is punched out sequentially in the feeding direction D of the steel plate 2 toward the final core plate 3. The punching of the steel plate 2 by the die 15 includes a pre-processing step in which the parts of the steel plate 2 other than the outer shape (other than the outer circumference) of the core plate 3 are punched out, and an outer shape punching step which punches out the outer shape of the core plate 3 from the steel plate 2 after the pre-processing step. The outer shape punching is performed last, and the core plate 3 is punched out of the steel plate 2 when the outer shape of the core plate 3 is punched out.
[0017] The adhesive is applied by the adhesive application device 14 before the core plate 3 is finally punched out from the steel plate 2, that is, when pre-processing is performed or before the outer shape punching is performed. In other words, the punching of the core plate 3 from the steel plate 2 by the die 15 is performed after the adhesive is applied by the adhesive application device 14.
[0018] The laminated section 16 is a part for forming a group of iron core plates 3a by laminating and bonding iron core plates 3 with adhesive applied. The laminated section 16 may be built into the lower die 131 at the position where the outer shape punching is performed by the die 15. The group of iron core plates 3a is formed by laminating and bonding multiple iron core plates 3. An iron core plate 3 is dropped onto the group of iron core plates 3a formed by the iron core plates 3 punched out earlier, and is bonded to the upper surface of the group of iron core plates 3a by the weight of the iron core plate 3 itself or the subsequent iron core plates 3, and by the pressure of the upper die 130. The upper die 130 may be provided with a projection that pushes down and pressurizes the iron core plate 3 on top of the group of iron core plates 3a by the thickness of one iron core plate 3.
[0019] The separation section 17 is the part that separates the laminated core 4 from the core plate group 3a. Although not limited, the separation section 17 can separate the laminated core 4 by biting between adjacent core plates 3 within the core plate group 3a. The separation section 17 may be built into the lower die 131 so as to be located to the side of the laminated section 16. For example, the separation of the laminated core 4 by the separation section 17 is performed once every time a plurality of core plates 3, such as 200, are punched out. In other words, the frequency of separation of the laminated core 4 is less than the frequency of punching out the core plates 3.
[0020] The laminated cores 4, separated from the core plate group 3a by the separation unit 17, are sent out from the laminated unit 16 by the transport device 18.
[0021] The manufacturing apparatus 1 of this embodiment further includes a drive device 20 that displaces the adhesive application device 14 relative to the steel plate 2 to switch whether or not to apply the adhesive. The drive device 20 of this embodiment is provided on the upper mold 130. The drive device 20 is positioned opposite the adhesive application device 14. In this embodiment, the drive device 20 is positioned above the adhesive application device 14.
[0022] The drive unit 20 can displace the adhesive application device 14 so as not to apply adhesive to one of the multiple core plates 3, depending on the number of core plates 3 to be included in the laminated core 4. The drive unit 40 can displace the adhesive application device 14 up and down so as to move closer to and away from the steel plate 2. When the adhesive application device 14 is brought closer to the steel plate 2, adhesive is applied, and when the adhesive application device 14 is moved away from the steel plate 2, adhesive is not applied. When the adhesive application device 14 is provided on the lower mold 131 and positioned below the steel plate 2 as shown in the figure, adhesive is applied when the adhesive application device 14 is raised, and adhesive is not applied when the adhesive application device 14 is lowered.
[0023] As described above, in the manufacturing apparatus 1 of this embodiment, the adhesive application device 14 is provided on the lower mold 131, and the drive device 20 is provided on the upper mold 130. If the adhesive application device 14 and the drive device 20 were to be provided together on either the upper mold 130 or the lower mold 131, a large space would be required on that side, which could reduce the mold strength and decrease the punching accuracy. In some cases, the drive device 20 may interfere with the adhesive application device 14, or the complex structure may reduce maintainability. In contrast, as in the manufacturing apparatus 1 of this embodiment, by distributing the adhesive application device 14 and the drive device 20 between the upper mold 130 and the lower mold 131, the risk of reduced mold strength and decreased punching accuracy can be reduced. Furthermore, the risk of the drive device 20 interfering with the adhesive application device 14 or reduced maintainability due to a complex structure can be reduced.
[0024] Next, Figure 2 is an explanatory diagram showing the drive device 20 of Figure 1 in more detail, and Figure 3 is a perspective view showing the operating pin 23 and guide member 30 of Figure 2.
[0025] As shown in Figure 2, the drive unit 20 includes an actuator 21, a slide cam 22 operated by the actuator 21, and at least one actuation pin 23 extending from the upper mold 130 to the lower mold 131, which displaces the adhesive application device 14 in accordance with the movement of the slide cam 22. The actuator 21 displaces the actuation pin 23 in the vertical direction. The adhesive application device 14 is displaced in the vertical direction in accordance with the displacement of the actuation pin 23.
[0026] The actuator 21 is composed of, for example, a solenoid actuator. The slide cam 22 includes a first cam member 221 that is slidably mounted horizontally by the actuator 21, and a second cam member 222 that is driven vertically in accordance with the sliding of the first cam member 221. The actuation pin 23 is connected to the second cam member 222 and is displaced vertically in accordance with the displacement of the second cam member 222.
[0027] As shown in Figure 2(b), when the first cam member 221 is slid to the left by the actuator 21 from the state shown in Figure 2(a), the second cam member 222 is displaced downward. As a result of this displacement of the second cam member 222, the operating pin 23 is lowered, moving the adhesive application device 14 away from the steel plate 2, and preventing the application of adhesive by the adhesive application device 14.
[0028] The slide cam 22 is positioned within a space 132a provided inside the die set 132 of the upper mold 130. The space 132a is formed by the upper part 132b of the die set, columnar portions 132c extending downward from both sides in the width direction of the upper part 132b of the die set, and the lower part 132d of the die set connected to the lower part of the columnar portions 132c. The columnar portions 132c and the lower part 132d of the die set are fixed to the upper part 132b of the die set.
[0029] The drive unit 20 further includes a first biasing body 25 provided between one end of the first cam member 221 and the column portion 132c. The first biasing body 25 is stretched when the first cam member 221 is slid to the left in the figure by the actuator 21, as shown in Figure 2(b). The first biasing body 25 is restored when the tension on the first cam member 221 by the actuator 21 is released. The restoration of the second biasing body 26 causes the first cam member 221 to slide to the right in the figure. The first biasing body 25 and the second biasing body 26 may be made of, for example, a spring, an air cylinder, or rubber.
[0030] The drive unit 20 further includes a second biasing member 26 provided between the lower surface of the second cam member 222 and the upper surface of the lower die set 132d. The second biasing member 26 is compressed when the second cam member 222 is displaced downward, as shown in Figure 2(b). The second biasing member 26 biases the second cam member 222 upward when the first cam member 221 is slid to the right in the figure, as shown in Figure 2(a).
[0031] The operating pin 23 is positioned above the outside of the steel plate 2 in the width direction W of the steel plate 2. The upper part 14a of the adhesive application device 14 is wider than the width of the steel plate 2, and the operating pin 23 can abut against the upper part 14a of the adhesive application device 14 on the outside of the steel plate 2 in the width direction W of the steel plate 2. The width of the upper part 14a of the adhesive application device 14 may be less than or equal to the width of the steel plate 2, and a separate member wider than the width of the steel plate 2 may be attached to the upper part 14a of the adhesive application device 14.
[0032] The number of operating pins 23 is arbitrary. Even if only one operating pin 23 is provided, the adhesive application device 14 can be moved away from the steel plate 2 by the descent of the operating pin 23. However, from the viewpoint of more reliably moving the adhesive application device 14 away from the steel plate 2, it is preferable to provide multiple operating pins 23. Figure 3 shows an example configuration in which four operating pins 23 are provided. It is preferable that the multiple operating pins 23 are arranged at equal intervals in the circumferential direction of the adhesive application device 14.
[0033] The manufacturing apparatus 1 of this embodiment is provided with an insertion hole 300 through which an operating pin 23 is inserted, and further includes a guide member 30 that guides the vertical movement of the operating pin 23. In this embodiment, the insertion hole 300 is provided in the lower part 132d of the die set of the upper mold 130 and in the plate holder 133 which is vertically movable attached to the die set 132 of the upper mold 130, and the guide member 30 is formed by these lower part 132d of the die set and the plate holder 133. By providing the guide member 30, the wobble of the operating pin 23 during vertical movement can be suppressed, and the adhesive application apparatus 14 can be stably moved away from the steel plate 2.
[0034] The gap between the inner edge of the insertion hole 300 and the outer edge of the operating pin 23 is preferably 5 μm to 50 μm. A gap of 5 μm or more can suppress wear of the operating pin 23 due to contact between the operating pin 23 and the guide member 30 during vertical movement. A gap of 50 μm or less can more reliably suppress the wobble of the operating pin 23 during vertical movement.
[0035] Preferably, the amount of protrusion of the operating pin 23 from the lower surface of the guide member 30 when the operating pin 23 is at its top dead center is 5 mm or less. The top dead center of the operating pin 23 is the position furthest from the adhesive application device 14 within the range of vertical movement of the operating pin 23 by the first cam member 221 and the second cam member 222. By limiting the amount of protrusion of the operating pin 23 to 5 mm or less, the wobble of the operating pin 23 during vertical movement can be more reliably suppressed. In this embodiment, the lower surface of the plate holder 133 constitutes the lower surface of the guide member 30. The amount of protrusion of the operating pin 23 from the lower surface of the guide member 30 may be the amount of protrusion of the operating pin 23 from the lower surface of the plate holder 133 when the operating pin 23 is in its uppermost position and the plate holder 133 is furthest from the die set 132.
[0036] The manufacturing apparatus 1 of this embodiment includes a buffer member 40 that allows displacement of the adhesive application apparatus 14 in directions toward and toward the steel plate 2. The buffer member 40 biases the adhesive application apparatus 14 toward the steel plate 2. The drive unit 20 overcomes the biasing force of the buffer member 40 and displaces the adhesive application apparatus 14 toward away from the steel plate 2. The adhesive application apparatus 14 returns to the position for applying adhesive due to the biasing force of the buffer member 40. The buffer member 40 may be made of, for example, a spring, an air cylinder, or rubber.
[0037] The lower mold 131 is provided with a positioning projection 131a that abuts against the upper surface of the adhesive application device 14 when the adhesive application device 14 is brought close to the steel plate 2, determining the position of the adhesive application device 14 in the height direction H. At the upper limit position of the adhesive application device 14 where the positioning projection 131a abuts against the upper surface of the adhesive application device 14, there is a shrinkage allowance remaining in the cushioning member 40, and when the adhesive application device 14 receives input from above, the cushioning member 40 allows the adhesive application device 14 to move downward.
[0038] Next, Figure 4 is an explanatory diagram showing a first modified example of the guide member 30 of Figure 2. As shown in Figure 4, the plate holder 133 may be omitted above the adhesive application device 14, and the guide member 30 may be constructed using only the upper mold 130 or its die set lower part 132d. In this case, it is conceivable to make the die set lower part 132d thicker in order to keep the amount of protrusion of the operating pin 23 from the lower surface of the guide member 30 below a predetermined value. Note that in Figure 4 (and the following Figures 5, 6, and 8), the guide member 30 is shown moved upward relative to the operating pin 23 for clarity.
[0039] Next, Figure 5 is an explanatory diagram showing a second modified example of the guide member 30 of Figure 2. When the guide member 30 is composed only of the die set lower part 132d, the die set lower part 132d may be divided into a first die set lower part 132d1 and a second die set lower part 132d2, which are arranged vertically apart from each other. In order to keep the amount of protrusion of the operating pin 23 from the lower surface of the guide member 30 below a predetermined value, the distance between the first die set lower part 132d1 and the second die set lower part 132d2 may be widened. Compared to the first modified example shown in Figure 4, the weight increase of the die set lower part 132d can be suppressed. The second die set lower part 132d2 is fixed to the column part 132c. In this respect, the second die set lower part 132d2 is different from the plate retainer 133 which is attached to the die set 132 so as to be vertically movable.
[0040] Next, Figure 6 is an explanatory diagram showing a third modified example of the guide member 30 of Figure 2, and Figure 7 is a perspective view showing the guide member 30 and base 50 of Figure 6. In the third modified example shown in Figures 6 and 7, the operating pin 23 is attached to the base 50, and the base 50 is connected to the second cam member 222. The base 50 is a member having a width greater than the diameter of the operating pin 23. In this embodiment, the base 50 is inserted through the insertion hole 300 of the guide member 30, and the guide member 30 may guide the vertical movement of the base 50. Multiple operating pins 23 may be attached together to the base 50, and only one insertion hole 300 may be provided in the guide member 30.
[0041] Next, Figure 8 is an explanatory diagram showing a fourth modified example of the guide member 30 of Figure 2, and Figure 9 is a perspective view showing the guide member 30 and base 50 of Figure 8. The base 50 may include a base body 500 positioned below the guide member 30 and a base shaft 501 extending upward from the base body 500. The base body 500 is a member having a width greater than the diameter of the operating pin 23, and the base shaft 501 is a member having a width smaller than the base body 500. The base shaft 501 is inserted through the insertion hole 300 of the guide member 30, and the guide member 30 may guide the vertical movement of the base shaft 501. Compared to the third modified example shown in Figures 6 and 7, this embodiment can reduce the weight of the base 50 and reduce the area of the insertion hole 300.
[0042] Next, Figure 10 is an explanatory diagram showing an example of the connection between the operating pin 23 and the second cam member 222 in Figure 2. The operating pin 23 may be connected to the second cam member 222 by any method, but it may be connected to the second cam member 222 in the manner shown in Figure 10. In the manner shown in Figure 10, the operating pin 23 is connected to the second cam member 222 by a support member 60. The support member 60 includes a cylindrical peripheral wall portion 61 with threads on its inner circumferential surface, a bottom portion 62 provided at one end of the peripheral wall portion 61, and a bottom insertion hole 63 provided in the bottom portion 62. The operating pin 23 includes a head portion 230 and a shaft portion 231. The head portion 230 is a larger diameter portion than the shaft portion 231 and is housed in the internal space of the support member 60 formed by the peripheral wall portion 61 and the bottom portion 62. The shaft portion 231 is a rod-shaped part extending from one end of the head portion 230 and extends to the outside of the support member 60 through the bottom insertion hole 63. A projection 222a with threads on its outer circumference is provided on the lower surface of the second cam member 222. The operating pin 23 is connected to the second cam member 222 via the support member 60 by screwing the threads on the outer circumference of the projection 222a into the threads on the inner circumference of the peripheral wall portion 61. The length of the peripheral wall portion 61 in the vertical direction is longer than the length of the head portion 230 in the same direction, allowing the head portion 230 to move up and down inside the peripheral wall portion 61.
[0043] Here, when a plurality of operating pins 23 are provided as shown in the illustrated embodiment, if the lengths of these operating pins 23 are different, only some of the operating pins 23 will strongly abut against the adhesive applicator 14, and there is a risk that the pressing down of the adhesive applicator 14 (moving the adhesive applicator 14 away from the steel plate 2) will become unstable.
[0044] The manufacturing apparatus 1 of the present embodiment further includes an absorbing member 70 for absorbing the difference in the lengths of the plurality of operating pins 23 in the vertical direction. In the embodiment shown in FIG. 10, the absorbing member 70 is constituted by a support member 60 that supports the operating pin 23 so as to be vertically movable and a shim 71 provided inside the support member 60. In FIG. 10(a), the operating pin 23 on the right side is shorter than the operating pin 23 on the left side. By providing more or thicker shims 71 inside the support member 60 on the right side compared to the inside of the support member 60 on the left side, the abutment of the left and right operating pins 23 against the adhesive applicator 14 can be made closer to being uniform.
[0045] Next, FIG. 11 is an explanatory diagram showing a modified example of the absorbing member 70 in FIG. 10. The absorbing member 70 may be constituted by a support member 60 that supports the operating pin 23 so as to be vertically movable and an elastic body 72 provided inside the support member 60. In FIG. 11(a), the operating pin 23 on the left side is longer than the operating pin 23 on the right side. By compressing the elastic body 72 inside the support member 60 on the left side more than the elastic body 72 inside the support member 60 on the right side, the abutment of the left and right operating pins 23 against the adhesive applicator 14 can be made closer to being uniform. As the elastic body 72, for example, a spring, rubber, or the like can be used. By adjusting the hardness of the elastic body 72, the abutment of the operating pin 23 can be adjusted.
[0046] In addition, in FIGS. 10 and 11, a shim 71 or an elastic body 72 is provided between the protrusion 222a of the second cam member 222 and the head 230 of the operating pin 23, but a shim 71 or an elastic body 72 may be provided between the head 230 of the operating pin 23 and the bottom 62 of the support member 60. These shims 71 and elastic bodies 72 may be used in combination.
[0047] The method for manufacturing the laminated core 4 according to the embodiment of the present invention includes manufacturing the laminated core 4 using the above-described manufacturing apparatus 1.
[0048] In other words, the method for manufacturing the laminated core 4 according to the embodiment of the present invention is a method for manufacturing the laminated core 4 in which a core plate 3 is punched out from a steel sheet 2 and the laminated core 4 is manufactured using the core plate 3, the method including a step of applying an adhesive to a portion of the steel sheet 2 corresponding to the core plate 3 by an adhesive application device 14, a step of punching out the core plate 3 from the steel sheet 2 by a mold 15 including an upper mold 130 and a lower mold 131 after the application of the adhesive by the adhesive application device 14, and a step of displacing the adhesive application device 14 with respect to the steel sheet 2 by a drive device 20 to switch whether or not to perform the application of the adhesive. The adhesive application device 14 is provided on either the upper mold 130 or the lower mold 131, and the drive device 20 is provided on the other of the upper mold 130 and the lower mold 131. The rest is as described above.
[0049] As described above, the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious that those having ordinary knowledge in the technical field to which the present invention pertains can conceive of various modification examples or correction examples within the scope of the technical idea described in the claims, and these are also naturally understood to belong to the technical scope of the present invention.
[0050] For example, in the embodiment, it has been described that the adhesive application device 14 is provided on the lower mold 131 and the drive device 20 is provided on the upper mold 130, but conversely, the adhesive application device 14 may be provided on the upper mold 130 and the drive device 20 may be provided on the lower mold 131. That is, the adhesive application device 14 may be provided on either the upper mold 130 or the lower mold 131, and the drive device 20 may be provided on the other of the upper mold 130 and the lower mold 131. At this time, the operating pin 23 extends from the other of the upper mold 130 and the lower mold 131 on which the drive device 20 is provided to the one. Also, the various upper and lower descriptions in the embodiment are reversed.
[0051] The inventions described herein may also be described as follows: [1] A laminated core manufacturing apparatus for punching out an iron core plate from a steel plate and manufacturing a laminated core using the iron core plate, comprising: an adhesive application device for applying adhesive to a portion of the steel plate corresponding to the iron core plate; a mold comprising a mold including an upper mold and a lower mold, for punching out the iron core plate from the steel plate after the adhesive has been applied by the adhesive application device; and a drive device for displacing the adhesive application device relative to the steel plate to switch whether or not to perform the application of the adhesive, wherein the adhesive application device is provided on either the upper mold or the lower mold, and the drive device is provided on the other of the upper mold and the lower mold. [2] The laminated core manufacturing apparatus according to paragraph 1, wherein the drive device comprises an actuator, a slide cam operated by the actuator, and at least one operating pin extending from the other of the upper mold and the lower mold to the other, for displacing the adhesive application device in accordance with the operation of the slide cam. [3] The laminated core manufacturing apparatus according to the first or second paragraph, further comprising an absorbent member for absorbing differences in the vertical lengths of a plurality of the actuation pins. [4] The laminated core manufacturing apparatus according to any one of the first to third paragraphs, further comprising a guide member that guides the vertical movement of the actuation pin or the base to which the actuation pin is attached, and through which the actuation pin or the base to which the actuation pin is attached is inserted. [5] The laminated core manufacturing apparatus according to any one of the first to fourth paragraphs, further comprising a buffer member that allows displacement of the adhesive application device in a direction toward and away from the steel plate, wherein the buffer member biases the adhesive application device toward the steel plate. [6] A method for manufacturing a laminated core, comprising manufacturing the laminated core using the laminated core manufacturing apparatus according to any one of the first to fifth paragraphs.
[0052] 1: Manufacturing equipment 2: Steel plate 3: Iron core plate 4: Laminated iron core 14: Adhesive application equipment 15: Mold 20: Drive device 21: Actuator 22: Slide cam 23: Actuator pin 30: Guide member 40: Cushioning member 50: Base 70: Absorbing member 130: Upper mold 131: Lower mold 300: Through hole
Claims
1. A laminated core manufacturing apparatus for punching out an iron core plate from a steel plate and manufacturing a laminated core using the iron core plate, comprising: an adhesive application device for applying adhesive to a portion of the steel plate corresponding to the iron core plate; a die including an upper die and a lower die for punching out the iron core plate from the steel plate after the adhesive has been applied by the adhesive application device; and a drive device for displacing the adhesive application device relative to the steel plate to switch whether or not to perform the application of the adhesive, wherein the adhesive application device is provided on either the upper die or the lower die, and the drive device is provided on the other of the upper die and the lower die.
2. The apparatus for manufacturing a laminated iron core according to claim 1, wherein the drive device includes an actuator, a slide cam operated by the actuator, and at least one actuation pin extending from the other to the one of the upper and lower molds, and displacing the adhesive application device in accordance with the movement of the slide cam.
3. The apparatus for manufacturing a laminated iron core according to claim 2, further comprising an absorbent member for absorbing differences in length between a plurality of the aforementioned operating pins in the vertical direction.
4. The apparatus for manufacturing laminated iron cores according to claim 2, further comprising a guide member that guides the vertical movement of the operating pin or the base to which the operating pin is attached, through an insertion hole through which the operating pin or the base to which the operating pin is attached is inserted.
5. The apparatus for manufacturing a laminated iron core according to claim 1, further comprising a buffer member that allows displacement of the adhesive application apparatus in a direction toward and away from the steel plate, wherein the buffer member biases the adhesive application apparatus toward the steel plate.
6. A method for manufacturing a laminated iron core, comprising manufacturing the laminated iron core using a laminated iron core manufacturing apparatus described in any one of claims 1 to 5.