Manufacturing apparatus and manufacturing method for laminated core

Abstract

The present application provides a kind of more reliably carried out the separation of laminated core from core sheet group, and can increase the punching speed of core sheet of laminated core manufacturing device and manufacturing method.The manufacturing device (1) of laminated core (4) of the present application is used to manufacture laminated core (4), which is formed by punching core sheet (3) of predetermined shape from steel sheet (2), and the laminated core obtained by laminating and bonding a predetermined number of core sheets (3), the manufacturing device (1) of laminated core (4) includes: punching part (5) for punching core sheet (3) from steel sheet (2);Adhesive coating part (6) for coating adhesive on the part of steel sheet (2) corresponding to core sheet (3);Laminating part (7) for laminating and bonding core sheet (3) in the state of coating adhesive to form core sheet group (30);And separation part (8) is inserted into the space between the core sheets (3) adjacent to each other in the core sheet group (30), the laminated core (4) is separated from the core sheet group (30), the laminating part (7) has a plurality of pairs of side pressure applying parts (71) for applying side pressure to the core sheet group (30), each pair of side pressure applying parts (71) is configured to be opposite to each other with the core sheet group (30) sandwiched in the middle, and at least one of the side pressure applying parts (71) serves as the separation part.

Description

Technical Field

[0001] This invention relates to an apparatus and method for manufacturing a laminated iron core, which is used to manufacture a laminated iron core. The laminated iron core is obtained by punching steel plates into iron core sheets of a predetermined shape and then stacking and bonding a predetermined number of iron core sheets. Background Technology

[0002] For iron cores or core sections used in rotating electric machines, a laminated iron core is used, consisting of a predetermined number of core sheets stacked together. These core sheets are joined together by various methods. When riveting or welding is used as the joining method, the magnetic properties of the laminated iron core may deteriorate due to mechanical or thermal stress during joining, as well as interlayer short circuits, preventing the full utilization of the laminated iron core's performance. Therefore, as shown in Patent Document 1 and others below, the process of laminating and bonding core sheets is being explored.

[0003] Patent Document 1 describes a manufacturing apparatus for a laminated iron core, comprising: a sequentially feeding die component having an upper die and a lower die for sequentially punching iron core sheets from an intermittently conveyed strip of thin steel sheet; and an adhesive coating component disposed within the lower die for coating adhesive onto portions of the strip of thin steel sheet corresponding to the iron core sheets. The adhesive coating component includes: an adhesive discharge section comprising a nozzle block having a plurality of discharge holes on its upper surface; and an adhesive supply section that supplies adhesive to the adhesive discharge section at a predetermined pressure, thereby discharging the adhesive from the plurality of discharge holes. Furthermore, the adhesive coating component also includes a forward / backward drive section that moves the adhesive discharge section forward and backward relative to the adhesive coating surface of the strip of thin steel sheet. The forward / backward movement of the adhesive discharge section by the forward / backward drive section switches between whether the adhesive coating process by the adhesive discharge section is performed. At the location of the uncoated core sheet, the stacked core, consisting of a predetermined number of core sheets, is separated from the core sheet assembly.

[0004] Prior technology documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2017-216873 Summary of the Invention

[0007] With the increasing demand for rotary motors, there is a desire to increase the punching speed of the core sheet. In the existing device described in Patent Document 1, the application of adhesive is switched by the advance and retraction of the adhesive discharge section. However, as the punching speed increases, switching the adhesive application process becomes more difficult, and separating the laminated core from the core sheet assembly becomes more difficult.

[0008] The present invention was made to solve the problems described above, and one of its objectives is to provide an apparatus and method for manufacturing a laminated iron core that can more reliably separate the laminated iron core from the iron core sheet assembly and can increase the punching speed of the iron core sheet.

[0009] Technical means for solving technical problems

[0010] In one embodiment, the manufacturing apparatus for a laminated iron core of the present invention is an apparatus for manufacturing a laminated iron core, wherein the laminated iron core is obtained by punching iron core sheets of a predetermined shape from a steel plate and stacking and bonding a predetermined number of iron core sheets. The manufacturing apparatus for the laminated iron core includes: a punching section for punching iron core sheets from a steel plate; an adhesive coating section for coating an adhesive on a portion of the steel plate corresponding to the iron core sheets; a stacking section for stacking and bonding the iron core sheets coated with adhesive to form an iron core sheet assembly; and a separating section that engages between adjacent iron core sheets within the iron core sheet assembly to separate the laminated iron core from the iron core sheet assembly. The stacking section has multiple pairs of lateral pressure applying sections that apply lateral pressure to the iron core sheet assembly, and each pair of lateral pressure applying sections is arranged such that the iron core sheet assembly is sandwiched in the middle and faces each other. At least one of the lateral pressure applying sections also serves as a separating section.

[0011] Furthermore, in one embodiment of the method for manufacturing the laminated iron core of the present invention, the laminated iron core is manufactured using the above-described laminated iron core manufacturing apparatus.

[0012] Invention Effects

[0013] According to one embodiment of the manufacturing apparatus and method for the laminated iron core of the present invention, the separating part bites into the iron core sheets that are adjacent to each other in the iron core sheet assembly, and separates the laminated iron core with a predetermined number of iron core sheets laminated and bonded together from the iron core sheet assembly. Therefore, the separation of the laminated iron core from the iron core sheet assembly can be performed more reliably, and the punching speed of the iron core sheets can be increased. Attached Figure Description

[0014] Figure 1 This is an explanatory diagram showing the manufacturing apparatus for the laminated iron core according to Embodiment 1 of the present invention.

[0015] Figure 2 It is a more specific expression Figure 1 An explanatory diagram of the stacked parts.

[0016] Figure 3 It means Figure 2 A top view of the iron core thin plate assembly and the side pressure application part.

[0017] Figure 4 It means Figure 2 A diagram illustrating the operation of the side pressure application section.

[0018] Figure 5 It means Figure 4 Explanation diagram of the first deformation example of the side pressure application part.

[0019] Figure 6 It means Figure 4 Explanation diagram of the second deformation example of the side pressure application part.

[0020] Figure 7 It means Figure 4 The diagram illustrates the third deformation of the side pressure application section.

[0021] Figure 8 yes Figure 2 A cross-sectional view of a thin iron core plate.

[0022] Figure 9 It is an enlarged representation Figure 1 Enlarged view of the adhesive coating part 6.

[0023] Figure 10 This is an explanatory diagram showing the stacked portion of the manufacturing apparatus for the stacked iron core according to Embodiment 2 of the present invention. Detailed Implementation

[0024] Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings. The present invention is not limited to each embodiment, and the constituent elements can be modified and embodied without departing from its spirit. Furthermore, various inventions can be formed by appropriately combining the multiple constituent elements disclosed in each embodiment. For example, several constituent elements may be deleted from all the constituent elements shown in the embodiments. Furthermore, constituent elements from different embodiments may be appropriately combined.

[0025] Implementation method 1.

[0026] Figure 1 This is an explanatory diagram showing the manufacturing apparatus 1 for the laminated iron core 4 according to Embodiment 1 of the present invention. Figure 1 The manufacturing apparatus 1 shown is an apparatus for manufacturing a laminated iron core 4, which is a laminated iron core obtained by punching a steel plate 2 into a predetermined shape of iron core sheet 3 and then stacking and bonding a predetermined number of iron core sheet sheets 3 together.

[0027] like Figure 1As shown, the manufacturing apparatus 1 of this embodiment may include a spool 10, a feeding device 11, an oiling device 12, and a stamping device 13. A coil of steel plate 2 is mounted on the spool 10. The steel plate 2 pulled from the spool 10 is fed to the stamping device 13 via the feeding device 11. The oiling device 12 is disposed between the feeding device 11 and the stamping device 13, and supplies stamping oil to the surface of the steel plate 2 before it is introduced into the stamping device 13. The stamping device 13 has an upper die 13a and a lower die 13b, through which the core sheet 3 is punched from the steel plate 2.

[0028] The manufacturing apparatus 1 of this embodiment includes a punching section 5, an adhesive coating section 6, a lamination section 7, and a separation section 8.

[0029] The punching section 5 is used to punch the iron core sheet 3 from the steel plate 2. The punching section 5 can be composed of an upper die 13a and a lower die 13b.

[0030] The punching of the steel plate 2 performed by the punching section 5 can be carried out in multiple steps. That is, the steel plate 2 can be punched sequentially along the feed direction D1 towards the final iron core sheet 3. The punching of the steel plate 2 performed by the punching section 5 may include: pre-processing, which punches out the outer shape or the portion other than the outer periphery of the iron core sheet 3 from the steel plate 2 through one or more processes; and shape punching, which punches out the outer shape of the iron core sheet 3 from the steel plate 2 after the pre-processing. The shape punching is performed last, and the iron core sheet 3 is punched from the steel plate 2 when the outer shape of the iron core sheet 3 is punched out.

[0031] The adhesive coating section 6 is used to apply adhesive to the portion of the steel plate 2 corresponding to the core sheet 3. The adhesive coating section 6 can be integrated into the lower mold 13b and can apply adhesive to the lower surface of the steel plate 2. Adhesive application can be performed before the core sheet 3 is finally punched from the steel plate 2, i.e., during pre-processing or before shape punching. However, the timing of adhesive application is arbitrary; for example, it can be performed at other times, such as before the steel plate 2 is introduced into the stamping equipment 13.

[0032] The lamination section 7 is used to laminate and bond the iron core sheet 3 coated with adhesive to form the iron core sheet assembly 30. The lamination section 7 can be built into the lower mold 13b at the position where the shape is punched by the punching section 5. The iron core sheet assembly 30 is formed by laminating and bonding multiple iron core sheets 3. The iron core sheet 3 falls onto the iron core sheet assembly 30 formed by the iron core sheet 3 that was punched out earlier, and is tightly contacted and bonded to the upper surface of the iron core sheet assembly 30 due to the weight of the iron core sheet 3 itself or subsequent iron core sheets 3, and the pressure of the upper mold 13a. A protrusion can be provided in the upper mold 13a, which presses the iron core sheet 3 on the iron core sheet assembly 30 downward by the thickness of one iron core sheet 3 and applies pressure.

[0033] The separating section 8 is a part that bites into the space between adjacent iron core sheets 3 within the iron core sheet assembly 30, separating the laminated iron core 4 from the iron core sheet assembly 30. The separating section 8 can be built into the lower die 13b in a manner located below or below the laminating section 7. For example, the separating section 8 separates the laminated iron core 4 once every 200 or more iron core sheets 3 are punched. That is, the frequency of separating the laminated iron core 4 is less than the frequency of punching the iron core sheets 3.

[0034] In the prior art, the core sheet assembly 30 is separated from one of the predetermined number of core sheets 3 without applying adhesive. However, when the core sheet 3 is punched at a relatively fast punching speed, such as 100 spps or more, switching the adhesive application becomes difficult, and separating the laminated core 4 from the core sheet assembly 30 becomes difficult. Therefore, in the prior art, the punching speed of the core sheet 3 is limited. In the manufacturing apparatus 1 of this embodiment, the separating part 8 engages between adjacent core sheets 3 within the core sheet assembly 30, separating the laminated core 4, which has a predetermined number of core sheets 3 laminated and bonded together, from the core sheet assembly 30. As a result, the separation of the laminated core 4 from the core sheet assembly 30 can be performed more reliably, and the punching speed of the core sheet 3 can be increased. In the manufacturing apparatus 1 of this embodiment, the adhesive coating section 6 can apply adhesive without switching between applying adhesive and not applying adhesive, and adhesive can be applied to all parts corresponding to the iron core sheet 3.

[0035] The manufacturing apparatus 1 may include a conveying device 9 for conveying the stacked iron core 4 separated from the iron core sheet assembly 30 by the separating section 8. The stacked iron core 4 can be removed from the lower mold 13b by the conveying device 9.

[0036] then, Figure 2 It is a more specific expression Figure 1 Explanation diagram of the stacked portion 7, Figure 3 It means Figure 2 A top view of the iron core thin plate assembly 30 and the side pressure application part 71. Figure 4 It means Figure 2 A diagram illustrating the operation of the side pressure application part 71.

[0037] like Figure 2 and Figure 3 As shown, the laminated portion 7 may have a compaction portion 70 and multiple pairs of lateral pressure application portions 71. In Figure 3 (a) and Figure 3 In (b), a scheme in which the laminated portion 7 has two pairs of side pressure application portions 71 is shown.

[0038] The compaction section 70 forms an internal space 70a, which narrows in width as it moves from top to bottom. The compaction section 70 can be positioned on the upper part of the stacked section 7. Due to the inner surface 70b of the compaction section 70, the core sheet 3 is guided, and lateral pressure is applied to the core sheet 3, thereby adjusting the position of the core sheet 3 stacked on the core sheet assembly 30 as it moves downward.

[0039] Multiple pairs of side pressure applying portions 71 are used to apply side pressure to the core sheet assembly 30. The multiple pairs of side pressure applying portions 71 can be disposed at the lower part of the lamination portion 7. The multiple pairs of side pressure applying portions 71 can be provided separately from the compaction portion 70 below it. Since the side pressure is applied to the core sheet assembly 30 by the multiple pairs of side pressure applying portions 71, the core sheet assembly 30 can be held. From this viewpoint, the side pressure applying portions 71 can also be referred to as holding portions or brakes. Figure 3 (a) and Figure 3 As shown in (b), each pair of side pressure application portions 71 can be arranged opposite each other in such a way that the core sheet assembly 30 is sandwiched in the middle. Each pair of side pressure application portions 71 is arranged separately from each other along the circumference of the core sheet assembly 30 in such a way that they are pressed against any side of the core sheet assembly 30.

[0040] Iron core thin plate assembly 30 can be like Figure 3 (a) and Figure 3 As shown in (b), in top view, there are four first side surfaces 30a (side surfaces extending vertically and horizontally in the figure) and four second side surfaces 30b located at the four corners. Two adjacent first side surfaces 30a extend in mutually orthogonal directions along the circumference of the core sheet assembly 30. The second side surfaces 30b extend obliquely relative to the directions in which the two first side surfaces 30a extend, and connect the two first side surfaces 30a. Figure 3 (a) shows a scheme in which the side pressure application part 71 is pressed onto the four first side surfaces 30a extending in the vertical, horizontal and vertical directions in the figure. The side pressure application part 71 can be pressed onto the center of the first side surfaces 30a in the vertical, horizontal and vertical directions. Figure 3 (b) shows a scheme in which the lateral pressure application part 71 is pressed against the four second side surfaces 30b located at the four corners. In such a case... Figure 3When viewed from above, the extension width of the second side 30b at the four corners is shorter than the extension width of the first side 30a at the top, bottom, left, and right, so the side pressure application part 71 can be pressed on most (more than 50%) of the area of ​​the second side 30b at the four corners. Figure 3 (a) and Figure 3 Arrow 9a in (b) indicates the conveying direction of the conveying device 9 to the stacked iron core 4.

[0041] In the manufacturing apparatus 1 of this embodiment, at least one of the side pressure application section 71 also serves as a separation section 8. Since at least one of the side pressure application section 71 also serves as a separation section 8, the number of components in the manufacturing apparatus 1 can be reduced.

[0042] In this embodiment, four side pressure application portions 71 are arranged at 90-degree intervals along the circumference of the core plate assembly 30. All four side pressure application portions 71 may also serve as separation portions 8, or only three or fewer side pressure application portions 71 may serve as separation portions 8. Furthermore, at least one pair of side pressure application portions 71 may also serve as separation portions 8. In this case, the separation portions 8 (side pressure application portions 71) can be engaged between the core plates 3 from both sides of the core plate assembly 30. Alternatively, one of each pair of side pressure application portions 71 may also serve as a separation portion 8. In this case, the separation portions 8 (side pressure application portions 71) can be engaged between the core plates 3 from two mutually orthogonal directions.

[0043] Multiple pairs of side pressure application parts 71 may each include a braking block 710 pressed against the side of the core plate assembly 30. The braking block 710 may be configured such that when the laminated core 4 is separated from the core plate assembly 30, it tilts, and the upper or lower corners 710a and 710b of the core plate assembly 30 in the height direction D2 bite into the spaces between the core plates 3. Figure 4 As specifically shown, the brake block 710 of this embodiment is configured such that the upper corner portion 710a bites into the space between the iron core plates 3, and the lower corner portion 710b tilts away from the iron core plate assembly 30.

[0044] The brake block 710 can have any shape, but in this embodiment, the brake block 710 is generally designed as a cuboid. The brake block 710 may have a front surface 710c, an upper surface 710d, and a lower surface 710e. The front surface 710c is the surface pressed against the side of the core plate assembly 30, and may be a plane along the side of the core plate assembly 30. The upper surface 710d is a surface extending from the upper end of the front surface 710c along the front-rear direction D3 of the brake block 710, and the lower surface 710e is a surface extending from the lower end of the front surface 710c along the front-rear direction D3 of the brake block 710. The upper surface 710d and the lower surface 710e may be planes orthogonal to the front surface 710c. The upper surface 710d and the lower surface 710e may extend parallel to each other separately in the height direction D2 of the core plate assembly 30.

[0045] The upper corner 710a is the portion where the front surface 710c abuts against the upper surface 710d, and the lower corner 710b is the portion where the front surface 710c abuts against the lower surface 710e. In the illustrated brake block 710, when viewed along the width direction D4, the upper and lower corners 710a and 710b are at right angles. The width direction D4 is orthogonal to the front-rear direction D3 and the height direction D2 of the core plate assembly 30. The height direction D2 of the core plate assembly 30 is synonymous with the height direction of the brake block 710.

[0046] The side pressure application unit 71 will be described in more detail. The side pressure application unit 71 of this embodiment also includes a base block 711, a pair of support arms 712, a tilting shaft 713, a force application member 714, and a drive member 715.

[0047] The base block 711 is positioned behind the brake block 710 in the front-rear direction D3. In other words, the brake block 710 is positioned between the side of the core sheet assembly 30 and the base block 711.

[0048] A pair of support arms 712 extend forward from the base block 711 separately in the width direction D4 (see reference). Figure 3 A pair of support arms 712 can extend parallel to each other. A brake block 710 is positioned between the pair of support arms 712 in front of the base block 711.

[0049] The tilting shaft 713 is mounted to the front end of a pair of support arms 712, extending along the width direction D4. The brake block 710 is tiltably supported by the tilting shaft 713. Figure 4 As specifically shown, the brake block 710 has a through hole 710f through which the tilting shaft 713 is inserted. The through hole 710f may be an elongated hole extending in the front-rear direction D3 in a manner that allows the brake block 710 to be displaced relative to the base block 711 in the front-rear direction D3.

[0050] The force-applying member 714, such as a coil spring, is disposed between the base block 711 and the brake block 710, applying force to the brake block 710 in the front-rear direction D3. By applying force to the brake block 710 through the force-applying member 714, lateral pressure is applied to the core plate assembly 30. Alternatively, the entire lateral pressure application unit 71 is driven in the front-rear direction D3 by a drive member (not shown), thereby applying lateral pressure to the core plate assembly 30. The drive member can apply force to the base block 711. When the lateral pressure application unit 71 is driven by the drive member, the force-applying member 714 can be omitted.

[0051] The insertion hole 710f of the brake block 710 is positioned forward of the center position of the brake block 710 in the longitudinal direction D3. For example... Figure 4 As shown, the drive member 715 pushes the rear part of the brake block 710 upward, thereby causing the upper corner 710a of the brake block 710 to engage between the core plates 3, enabling the laminated core 4 to separate from the core plate assembly 30. Alternatively, the drive member 715 is configured to push the rear part of the brake block 710 downward, thereby causing the lower corner 710b to engage between the core plates 3. The drive member 715 can be any configuration, such as a hydraulic plunger, a solenoid plunger, or a stepper motor.

[0052] The through hole 710f is positioned above the center of the brake block 710 in the height direction D2 of the core plate assembly 30. That is, in this embodiment, the brake block 710 is tiltably supported by a tilting shaft 713, which is located above the center of the brake block 710 in the height direction D2 of the core plate assembly 30. Because the tilting shaft 713 is positioned above the center, according to the lever principle, the force required to engage the upper corner 710a with the core plates 3 is increased.

[0053] then, Figure 5 It means Figure 4 Explanation diagram of the first deformation example of the side pressure application part 71, Figure 6 It means Figure 4 An explanatory diagram of the second deformation example of the side pressure application part 71. Figure 4 The proposed solution describes pushing the rear of the brake block 710 upwards, causing the upper corner 710a to engage with the thin iron core plates 3. However, the method for tilting the brake block 710 can be arbitrarily changed.

[0054] Figure 5The first variation shown is an example of a sliding cam type that tilts the brake block 710 via a sliding cam 72. The sliding cam 72 includes a first sliding cam 721 having multiple cams 721a and 722a, and a second sliding cam 722. The first sliding cam 721 is disposed at the lower rear portion of the brake block 710 and is fixed to the brake block 710. The second sliding cam 722 is configured such that its cam 722a engages with the cam 721a of the first sliding cam 721. The second sliding cam 722 is displaced to the right in the figure, thereby causing the cam 721a of the first sliding cam 721 to engage with the cam 722a of the second sliding cam 722. As a result, the rear portion of the brake block 710 is pushed upwards, and the brake block 710 tilts about the tilting shaft 713, allowing the upper corner 710a of the brake block 710 to engage between the iron core plates 3.

[0055] exist Figure 6 In the second variation shown, it is an example of a seesaw-type mechanism that tilts the brake block 710 around a tilting shaft 713 positioned further rearward than the brake block 710. The tilting shaft 713 is provided on an arm 73 extending rearward from the brake block 710. By pushing the rear portion of the arm 73 (the portion further away from the brake block 710 than the tilting shaft 713) upward, the upper corner 710a can be engaged between the iron core plates 3.

[0056] then, Figure 7 It means Figure 4 The diagram illustrates a third modified example of the side pressure application portion 71. The upper corner 710a, which bites into the iron core plates 3, can be seen as an acute angle when the brake block 710 is viewed along the width direction D4. Figure 7 As shown, by providing a recess 710g at the upper part of the front surface 710c, the upper corner 710a can be made into an acute angle. It is provided adjacent to the upper end of the front surface 710c. The extension width of the recess 710g in the height direction D2 is preferably 50% or less of the extension width of the front surface 710c in the height direction D2, more preferably 25% or less, and even more preferably 10% or less. In a configuration where the lower corner 710b is engaged with the core sheet 3, the lower corner 710b can be made into an acute angle.

[0057] then, Figure 8 yes Figure 2A cross-sectional view of the core sheet 3. As described above, the core sheet 3 is punched out from the steel sheet 2. At the end of the core sheet 3, a protrusion 31 is formed on the upper surface and a burr 32 is formed on the lower surface. The protrusion 31 is formed when the tip of the upper die 13a is pressed into the surface of the steel sheet 2, and a tensile force is applied to the surface of the steel sheet 2, causing deformation of the surface. The burr 32 is formed when the tip of the upper die 13a is pulled out of the steel sheet 2, causing the steel sheet 2 to be stretched or broken. The burr 32 is also called a burr.

[0058] When the iron core plates 3 are stacked, the rough edges 32 of the upper iron core plate 3 will cover the unevenness 31 of the lower iron core plate 3, and the gap between the upper iron core plate 3 and the lower iron core plate 3 may sometimes become smaller.

[0059] The punching portion 5 can change the end shape of the core plate 3 at the position where the laminated core 4 is separated from the core plate assembly 30. More specifically, the punching portion 5 makes the height of the burr 32 of the core plate 3 at the position where the laminated core 4 is separated from the core plate assembly 30 lower than the height of the burr 32 of other core plates 3. In other words, in the core plate 3, the lower surface plate 3a (see reference) is included. Figure 8 ) and laminated thin plate 3b (refer to Figure 8 The lower surface plate 3a forms the lower surface of the core plate assembly 30 after the laminated core 4 is separated from the core plate assembly 30. The laminated plate 3b is stacked on the lower surface plate 3a. The punching part 5 can be configured to punch the lower surface plate 3a such that the height of the burr 32 formed on the lower part of the lower surface plate 3a is smaller than the height of the burr 32 formed on the lower part of the laminated plate 3b. The height of the burr 32 can be adjusted by changing the gap between the cutting tip of the upper die 13a and the cutting tip of the lower die 13b. The upper die 13a and / or the lower die 13b can be made variable so that when punching the core plate 3 (lower surface plate 3a) at the position where the laminated core 4 is separated from the core plate assembly 30, the gap between the cutting tip of the upper die 13a and the cutting tip of the lower die 13b is reduced.

[0060] For example, the upper mold 13a and / or the lower mold 13b can be made variable so that in Figure 3 The part touched by the brake block 710 in the middle ( Figure 3 (a) The central part of the four first side surfaces 30a (edges) on the outer periphery of the thin iron core plate assembly 30. Figure 3 In (b), the burrs 32 on the second side surface 30b (edge) at the four corners of the outer periphery of the thin iron core plate assembly 30 become smaller. In other words, the die cutter can be composed of multiple parts, allowing the gap between at least some of the parts to be variable. In such cases... Figure 3Thus, when viewed from above, the die for punching the outer periphery of the core sheet 3 generally consists of eight parts: the edges forming the four first side surfaces 30a (top, bottom, left, and right) and the edges forming the second side surfaces 30b (corners). As described above, by reducing the burr 32 at the center of the four sides, the parts for cutting the four sides can be further divided into three smaller parts (a total of twelve smaller parts). These three smaller parts can respectively cut the center and end portions of the top, bottom, left, and right sides. The smaller part used for cutting the center portion of each side can be made variable. For example... Figure 3 As in (b), when the brake block 710 is pressed against the second side 30b of the four corners, the component used to cut off the edge of the second side 30b constituting the four corners can be made variable.

[0061] Alternatively, the punching section 5 can not make the gap variable, but punch the core sheet 3 in such a way that the height of the burr 32 at the part where the brake block 710 is pressed becomes smaller than the height of the burr 32 at the adjacent position. When illustrating with the above example, the gap of the small part among the three small parts used to cut off the central portion of the edge constituting the first side surface 30a can be set smaller than the gap of the small parts used to cut off the two ends of that edge. In such a case... Figure 3 When the brake block 710 shown in (b) is pressed against the second side 30b of the four corners, the gap of the component used to cut off the edge of the second side 30b of the four corners can be set to be smaller than the gap of the component used to cut off the top, bottom and left and right sides.

[0062] then, Figure 9 It is Figure 1 An enlarged view of the adhesive coating section 6. (See enlarged view for details.) Figure 9 As shown, the adhesive application section 6 has a discharge section 60, which is provided with a passage 60a for the adhesive to pass through, and is configured to discharge the adhesive from the front end of the passage 60a. In the illustrated embodiment, the discharge section 60 is composed of a plurality of nozzles arranged separately from each other. The adhesive application section 6 is configured such that the adhesive discharged from the front end of the discharge section 60 contacts the steel plate 2 in accordance with the up-and-down movement of the steel plate 2 accompanying the punching of the core sheet 3 from the steel plate 2.

[0063] In this embodiment, adhesive is applied to the surface of the steel plate 2 (the lower surface in the figure). Uncoated areas 300, where no adhesive is applied, are provided on the outer periphery of the surface corresponding to the core plate 3. When the core plate assembly 30 is formed in the laminate 7, the uncoated areas 300 create gaps between adjacent core plates 3 within the core plate assembly 30. The separation section 8 (side pressure application section 71) can engage with the core plates 3 through the gaps formed by the uncoated areas 300. The uncoated areas 300 may be provided at least at the position of the separation section 8 in the circumferential direction of the portion corresponding to the core plate 3. Alternatively, the uncoated areas 300 may cover the entire circumference of the portion corresponding to the core plate 3, and be provided on the outer periphery of the portion corresponding to the core plate 3.

[0064] Implementation method 2.

[0065] Figure 10 This is an explanatory diagram showing the lamination section 7 of the manufacturing apparatus 1 for the laminated iron core 4 according to Embodiment 2 of the present invention. In Embodiment 1, the side pressure application section 71 is described as also serving as the separation section 8, but it is also possible that the separation section 8 is provided separately from the side pressure application section 71. Figure 10 In the illustrated scheme, the separating section 8 is composed of multiple wedge-shaped members, which are configured to separate from each other circumferentially below the side pressure application section 71. The separating section 8 is configured to move forward and backward in both directions relative to the side of the core plate assembly 30. When the separating section 8 approaches the side of the core plate assembly 30, its front end 8a engages between adjacent core plates 3 within the core plate assembly 30, thereby separating the laminated core 4 from the core plate assembly 30. The components constituting the separating section 8 can also be located above the side pressure application section 71 or at other positions. Other configurations are the same as in Embodiment 1.

[0066] The method for manufacturing the laminated iron core 4 according to an embodiment of the present invention includes manufacturing the laminated iron core 4 using the aforementioned manufacturing apparatus 1. The method for manufacturing the laminated iron core 4 may include: a step of punching a core sheet 3 from a steel plate 2 using a punching section 5; a step of applying adhesive to the portion of the steel plate 2 corresponding to the core sheet 3 using an adhesive coating section 6; a step of laminating and bonding the core sheets 3 coated with adhesive in a lamination section 7 to form a core sheet assembly 30; and a step of engaging a separating section 8 between adjacent core sheets 3 within the core sheet assembly 30 to separate the laminated iron core 4, which has a predetermined number of core sheets 3 laminated and bonded together, from the core sheet assembly 30.

[0067] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the examples described above. It should be understood that anyone with common knowledge in the technical field to which this invention pertains can conceive of various modifications or alterations within the scope of the technical concept described in the protection scope, and it should be understood that such modifications or alterations naturally fall within the technical scope of this invention.

[0068] The technical solutions described in this specification can also be described as follows.

[0069] [1]

[0070] An apparatus for manufacturing laminated iron cores, wherein the laminated iron core is obtained by punching steel plates into core sheets of a predetermined shape and then stacking and bonding a predetermined number of the core sheets together.

[0071] The apparatus for manufacturing the laminated iron core includes:

[0072] A punching section for punching the core sheet from the steel plate;

[0073] An adhesive coating section is used to apply adhesive to the portion of the steel plate corresponding to the iron core sheet;

[0074] The lamination section is used to laminate and bond the iron core sheets coated with the adhesive to form an iron core sheet assembly; and

[0075] A separating section engages between adjacent core plates within the core plate assembly, separating the laminated core from the core plate assembly.

[0076] The laminated portion has multiple pairs of lateral pressure applying portions that apply lateral pressure to the core sheet assembly, each pair of lateral pressure applying portions being configured to sandwich the core sheet assembly in the middle and facing each other.

[0077] At least one of the side pressure application parts also serves as the separation part.

[0078] [2]

[0079] The manufacturing apparatus for laminated iron cores as described in item 1, wherein,

[0080] The multiple pairs of side pressure application parts each include braking blocks that are pressed against the sides of the iron core sheet assembly.

[0081] The brake block is configured to tilt when separating the stacked core from the core sheet assembly, with the upper or lower corner of the core sheet assembly in the height direction biting into the core sheets.

[0082] [3]

[0083] The manufacturing apparatus for the laminated iron core as described in item 2, wherein,

[0084] The brake block is configured such that the upper corner bites into the space between the core plates and tilts away from the core plate assembly with the lower corner away from the core plate assembly.

[0085] [4]

[0086] The manufacturing apparatus for laminated iron cores as described in item 3, wherein,

[0087] The brake block is tiltably supported by a tilting shaft located above the center of the brake block in the height direction of the iron core plate assembly.

[0088] [5]

[0089] The apparatus for manufacturing a laminated iron core as described in any one of items 1 to 4, wherein,

[0090] The punching section alters the shape of the end of the core sheet at the location where the laminated core is separated from the core sheet assembly.

[0091] [6]

[0092] The apparatus for manufacturing a laminated iron core as described in any one of items 1 to 5, wherein,

[0093] The adhesive is applied to the surface of the steel plate. On the outer periphery of the surface of the steel plate corresponding to the core sheet, there is a non-coated area where the adhesive is not applied. When the core sheet assembly is formed in the laminate, the non-coated area forms a gap between adjacent core sheets in the core sheet assembly. The separation part bites into the core sheets through the gap formed by the non-coated area.

[0094] [7]

[0095] A method for manufacturing a laminated iron core, comprising manufacturing the laminated iron core using an apparatus for manufacturing a laminated iron core as described in any one of claims 1 to 6.

[0096] Explanation of reference numerals in the attached figures

[0097] 1: Manufacturing equipment

[0098] 2: Steel plate

[0099] 3: Thin iron core plate

[0100] 4: Laminated iron core

[0101] 5: Punching section

[0102] 6: Adhesive coating section

[0103] 7: Stacked section

[0104] 8: Separation section

[0105] 30: Thin-plate iron core assembly

[0106] 71: Side pressure application section

[0107] 710: Brake block

[0108] 710a: Upper corner

[0109] 710b: Lower corner

[0110] 713: Tilting Shaft

Claims

1. An apparatus for manufacturing a laminated iron core, used to manufacture a laminated iron core, wherein the laminated iron core is obtained by punching steel plates into iron core sheets of a predetermined shape and then stacking and bonding a predetermined number of the iron core sheets. The apparatus for manufacturing the laminated iron core includes: A punching section for punching the core sheet from the steel plate; An adhesive coating section is used to apply adhesive to the portion of the steel plate corresponding to the iron core sheet; The lamination section is used to laminate and bond the iron core sheets coated with the adhesive to form an iron core sheet assembly; and The separating section engages with adjacent iron core plates within the iron core plate assembly, separating the stacked iron core from the iron core plate assembly. The laminated portion has multiple pairs of lateral pressure applying portions that apply lateral pressure to the core sheet assembly, each pair of lateral pressure applying portions being configured to sandwich the core sheet assembly in the middle and facing each other. At least one of the side pressure application parts also serves as the separation part.

2. The apparatus for manufacturing a laminated iron core as described in claim 1, wherein, The multiple pairs of side pressure application parts each include braking blocks that are pressed against the sides of the iron core sheet assembly. The brake block is configured to tilt when separating the stacked core from the core sheet assembly, with the upper or lower corner of the core sheet assembly in the height direction biting into the core sheets.

3. The apparatus for manufacturing a laminated iron core as described in claim 2, wherein, The brake block is configured such that the upper corner bites into the space between the core plates and tilts away from the core plate assembly with the lower corner away from the core plate assembly.

4. The apparatus for manufacturing a laminated iron core as described in claim 3, wherein, The brake block is tiltably supported by a tilting shaft located above the center of the brake block in the height direction of the iron core plate assembly.

5. The apparatus for manufacturing a laminated iron core as described in any one of claims 1 to 4, wherein, The punching section alters the shape of the end of the core sheet at the location where the laminated core is separated from the core sheet assembly.

6. The apparatus for manufacturing a laminated iron core as described in any one of claims 1 to 4, wherein, The adhesive is applied to the surface of the steel plate. On the outer periphery of the surface of the steel plate corresponding to the core sheet, there is a non-coated area where the adhesive is not applied. When the core sheet assembly is formed in the laminate, the non-coated area forms a gap between adjacent core sheets in the core sheet assembly. The separation part bites into the core sheets through the gap formed by the non-coated area.

7. A method for manufacturing a laminated iron core, comprising manufacturing the laminated iron core using the apparatus for manufacturing a laminated iron core as described in any one of claims 1 to 4.

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