Stator and rotor iron core stamping die with in-die heating function

Abstract

The stator and rotor iron core stamping die with the in-die heating function comprises an upper die set and a lower die set, the lower die set is sequentially provided with a plurality of forming stations and blanking stations in the first direction, and each blanking station comprises a blanking groove, a bearing assembly and a heating assembly. And the blanking groove is formed in the top of the lower module. The bearing assembly comprises a rotary table and a driving device. The rotary table is arranged in the discharging groove and used for bearing the stator and the rotor. The driving device is used for driving the turntable to move up and down relative to the lower module in the first direction. The heating assembly surrounds the discharging groove, is arranged close to the top of the discharging groove and is used for heating the multiple stators and rotors borne by the rotary table and transferring the stators and rotors through the driving device. Each independent stator and rotor is continuously heated in the blanking station corresponding to the heating assembly, glue on the back faces of the stators and rotors can be heated to the temperature interval where the stators and rotors can be bonded, after the stators and rotors are transferred, the whole lamination sheets with pressure are bonded together, and therefore the stators and rotors are heated and bonded in a stamping die, and the working process is simplified.

Description

Technical Field

[0001] The invention relates to the technical field of mold equipment, and in particular to a stator and rotor core stamping mold with an in-mold heating function. Background Art

[0002] In the prior art, the most common method for fixing the laminated structure of the core punching sheets is the stacking riveting fixing method. The core punching sheets of the stacking riveting fixing method are stamped with stacking rivet points. When stacked, the two adjacent core punching sheets are connected to each other through the stacking rivet points on them. However, due to the presence of the stacking rivet points on the core punching sheets, the magnetic properties of the entire core are reduced. Therefore, bonding is adopted to fix the core sheets. A layer of self-adhesive coating film is provided on at least one of the upper and lower surfaces of the material strip. The self-adhesive coating film is solid at room temperature and can be melted and bonded after heating. However, in the prior art, heating and bonding are often performed outside the mold, and the transfer process is cumbersome and requires additional labor. Summary of the invention

[0003] In order to overcome the above disadvantages, the object of the present invention is to provide a method to solve the problems caused by the above background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is a stator and rotor core stamping die with an in-mold heating function, the material strip used to make the stator and rotor core is a self-adhesive coating material strip, and at least one of the upper and lower surfaces of the self-adhesive coating material strip is provided with a layer of self-adhesive coating film. It is characterized in that the stator and rotor core stamping die includes an upper die set and a lower die set, wherein: The lower die set is provided with a plurality of forming stations and blanking stations in sequence along the first direction, and the blanking stations include a blanking trough, a carrying assembly and a heating assembly. The blanking trough is provided at the top of the lower die set. The carrying assembly includes a turntable and a driving device, and the turntable is provided in the blanking trough for carrying the stator and rotor. The driving device is used to drive the turntable to move up and down relative to the lower die set along the first direction. The heating assembly surrounds the blanking trough and is provided near the top of the blanking trough, and is used to heat the plurality of stators and rotors carried by the turntable, and transfer the stators and rotors through the driving device.

[0005] The present invention provides a stator and rotor core stamping die with in-mold heating function. By setting a heating component in the blanking station, a group of heating devices are added to the outer ring of the locking ring, and preheating is performed in advance before the punch press is punched. At the same time, the multiple stators and rotors carried by the turntable are continuously heated in the blanking station corresponding to the heating component to achieve blanking. The glue on the back of the stator and rotor will be heated to a bonding temperature range. When the driving device transfers the stator and rotor, the product is no longer heated, the glue is solidified, and the entire belt-pressed lamination is bonded together. Specifically, the heating component is preheated in advance before the stamping die is stamped to ensure that the temperature of the heating component reaches the melting temperature required by the self-adhesive coating strip.

[0006] In some embodiments, a blanking die is provided at the top of the blanking trough, and the upper die set is provided with a blanking punch corresponding to the blanking die, which is used to press the stator and rotor from the self-adhesive coating strip into the blanking trough. A locking ring is provided below the blanking trough, and the locking ring is arranged around the blanking trough. An annular installation area is provided on one side of the locking ring away from the blanking trough, and the heating component is arranged in the annular installation area and is clamped and fixed with the locking ring.

[0007] By adopting the above technical solution, a heating component is set at the blanking station to heat the sheet to reach the temperature required for melting the surface coating. The locking ring can provide a certain resistance to the downward movement of the stator and rotor, so that the stator and rotor are continuously heated during the time when they are retained in the locking ring, and are compacted by the blanking punch and turntable to form the required iron core.

[0008] In some embodiments, the heating component is one of a heating copper tube or an induction heating coil.

[0009] In some embodiments, the driving device includes a rotating top cylinder and a linear push rod, wherein the rotating top cylinder is disposed at the bottom of the lower die set and is disposed corresponding to the blanking chute. The linear push rod extends along the second direction, one end of which is connected to the bottom of the turntable, and the other end of which is passed through the lower die set and connected to the rotating top cylinder, so as to drive the turntable to move through the rotating top cylinder.

[0010] By adopting the above technical solution, the combination of the linear push rod and the rotating top cylinder can realize precise position control, and the highest position of the turntable is the bottom of the locking ring, so that the stator and rotor pressed down by the blanking punch are heated within the heating range of the heating component. When the number of stators and rotors carried by the turntable reaches the maximum value, that is, the number of stators and rotors corresponding to the height of the heating component, the multiple stators and rotors that have been melted and bonded are moved out of the influence range of the heating component by rotating the top cylinder.

[0011] In some embodiments, the upper die set is provided with an upper die seat, an upper pad, a convex fixing plate, a stripper plate seat and a stripper plate in sequence along the second direction, and the lower die set is provided with a concave fixing plate, a lower die seat and a lower pad in sequence along the second direction. The blanking punch is connected to the upper pad and penetrates the convex fixing plate, the stripper plate seat and the stripper plate. The blanking trough is provided corresponding to the concave fixing plate, the lower die seat and the lower pad. The rotating top cylinder is provided at the bottom of the lower pad.

[0012] With the above technical solution, the design of the upper die set and the lower die set enhances the overall structural stability and strength of the die by sequentially arranging different plate layers. The blanking punch is connected to the upper pad and penetrates multiple plate layers to achieve precise blanking control.

[0013] In some embodiments, the blanking station further includes a temperature sensor, which is disposed at the bottom of the locking ring and is used to detect the temperature in the blanking trough.

[0014] By adopting the above technical solution, the temperature sensor can quickly and accurately reflect the changes in temperature information, accurately detect the temperature in the blanking chute, and ensure that the temperature in the chute is within the bonding temperature range.

[0015] In some embodiments, a heat insulation layer is provided on one side of the blanking station along the first direction close to the plurality of forming stations.

[0016] By adopting the above technical solution, a heat insulation layer is provided to prevent heat from being transferred to the forming station and affecting the products in the forming station, and the temperature in the blanking chute can be stabilized.

[0017] In some embodiments, the blanking chute is disposed along one side of the third direction and passes through the lower die assembly.

[0018] By adopting the above technical solution and arranging an opening on one side of the blanking chute, it is convenient to transport a plurality of stators and rotors that have been heated. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work, among which: Figure 1 A cross-sectional view of an embodiment of a stator and rotor core stamping die with an in-die heating function according to the present invention; Figure 2 A three-dimensional diagram of an embodiment of a stator and rotor core stamping die with an in-die heating function according to the present invention; Figure 3 It is a partial structural schematic diagram of an embodiment of a stator and rotor core stamping die with in-die heating function of the present invention; In the figure: 10. Upper die seat; 11. Upper pad; 12. Convex fixing plate; 13. Unloading plate seat; 14. Unloading plate; 20. Concave fixing plate; 21. Lower die seat; 22. Lower pad; 3. Forming station; 4. Blanking station; 40. Blanking chute; 41. Blanking die; 42. Blanking punch; 43. Locking ring; 5. Carrying assembly; 50. Turntable; 51. Rotating top cylinder; 52. Linear push rod; 6. Heating assembly; 7. Self-adhesive coating tape. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0021] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0022] It should be noted that in the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invented product is usually placed when in use, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. Terms such as "horizontal", "vertical", and "overhanging" do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0025] refer to Figures 1 to 3 , Figure 1 A cross-sectional view of a stator and rotor core stamping die with an in-die heating function provided by an embodiment of the present invention is shown; Figure 2 A three-dimensional diagram of a stator and rotor core stamping die with an in-die heating function provided by an embodiment of the present invention is shown; Figure 2 A partial structural schematic diagram of a stator and rotor core stamping die with in-die heating function provided by an embodiment of the present invention is shown.

[0026] like Figures 1 to 3 As shown, the technical solution adopted by the present invention is a stator and rotor core stamping die with an in-mold heating function, and the material strip used to make the stator and rotor core is a self-adhesive coating material strip 7, and at least one of the upper and lower surfaces of the self-adhesive coating material strip 7 is provided with a layer of self-adhesive coating film. It is characterized in that the stator and rotor core stamping die includes an upper die set and a lower die set, wherein: The lower die set is provided with a plurality of forming stations 3 and blanking stations 4 in sequence along the first direction. The blanking station 4 includes a blanking trough 40, a bearing assembly 5 and a heating assembly 6. The blanking trough 40 is provided at the top of the lower die set. The bearing assembly 5 includes a turntable 50 and a driving device. The turntable 50 is provided in the blanking trough 40 for bearing the stator and rotor. The driving device is used to drive the turntable 50 along the first direction ( Figure 1 The heating assembly 6 surrounds the blanking chute 40 and is disposed near the top of the blanking chute 40 to heat the multiple stators and rotors carried by the turntable 50 and transfer the stators and rotors through the driving device.

[0027] The present application provides a stator and rotor core stamping die with in-mold heating function. By setting a heating component 6 in the blanking station 4, a group of heating devices are added to the outer ring of the locking ring 43, and preheating is performed in advance before the punch press is pressed. At the same time, the multiple stators and rotors carried by the turntable 50 are continuously heated in the blanking station 4 corresponding to the heating component 6 to achieve each individual stator and rotor for blanking. The glue on the back of the stator and rotor will be heated to a bonding temperature range. When the driving device transfers the stator and rotor, the product is no longer heated, the glue is solidified, and the entire belt-pressed lamination is bonded together, so that the heating and bonding of the stator and rotor are set in the stamping die, simplifying the work process. Specifically, the heating component 6 is preheated in advance before the stamping die is stamped to ensure that the temperature of the heating component 6 reaches the melting temperature required by the self-adhesive coating strip 7.

[0028] In some embodiments, reference Figures 1 to 3 The top of the blanking trough 40 is provided with a blanking die 41, and the upper die set is provided with a blanking punch 42 corresponding to the blanking die 41, which is used to press the stator and rotor from the self-adhesive coating strip 7 into the blanking trough 40. A locking ring 43 is provided below the blanking trough 40, and the locking ring 43 is arranged around the blanking trough 40. A ring-shaped installation area is provided on the side of the locking ring 43 away from the blanking trough 40, and the heating component 6 is arranged in the ring-shaped installation area and is clamped and fixed with the locking ring 43.

[0029] Exemplarily, a heating assembly 6 is provided at the blanking station 4 to heat the material sheet to reach the temperature required for melting the surface coating. The locking ring 43 can provide a certain resistance to the downward movement of the stator and rotor, so that the stator and rotor are continuously heated during the time when the locking ring 43 is retained, and are pressed together by the blanking punch 42 and the turntable 50 to form the required iron core.

[0030] In some embodiments, the heating element 6 is one of a heating copper tube or an induction heating coil.

[0031] Exemplarily, the heating copper tube and the induction heating coil are both commonly used heating devices. The induction heating coil can achieve rapid heating, while the copper tube has a high thermal conductivity and can transfer heat quickly. It is suitable for occasions requiring efficient heat transfer and has a long service life. Specifically in this solution, the heating component 6 used is a heating copper tube.

[0032] In some embodiments, reference Figures 1 to 3 The driving device includes a rotary top cylinder 51 and a linear push rod 52. The rotary top cylinder 51 is arranged at the bottom of the lower die set and is arranged corresponding to the blanking chute 40. The linear push rod 52 moves along the second direction ( Figure 1 One end of the turntable 50 is connected to the bottom of the turntable 50, and the other end is passed through the lower mold assembly and connected to the rotating top cylinder 51, so as to drive the turntable 50 to move through the rotating top cylinder 51.

[0033] For example, the combination of the linear push rod 52 and the rotating top cylinder 51 can realize precise position control, and the highest position of the turntable 50 is the bottom of the locking ring 43, so that the stator and rotor pressed down by the blanking punch 42 are heated within the heating range of the heating component 6. When the number of stators and rotors carried by the turntable 50 reaches the maximum value, that is, the number of stators and rotors corresponding to the height of the heating component 6, the multiple stators and rotors that have been melted and bonded are moved out of the influence range of the heating component 6 by rotating the top cylinder 51.

[0034] In some embodiments, reference Figures 1 to 3 The upper die set is provided with an upper die seat 10, an upper pad 11, a convex fixing plate 12, a stripper plate seat 13 and a stripper plate 14 in sequence along the second direction, and the lower die set is provided with a concave fixing plate 20, a lower die seat 21 and a lower pad 22 in sequence along the second direction. The blanking punch 42 is connected to the upper pad 11 and penetrates the convex fixing plate 12, the stripper plate seat 13 and the stripper plate 14. The blanking trough 40 is provided corresponding to the concave fixing plate 20, the lower die seat 21 and the lower pad 22. The rotating top cylinder 51 is provided at the bottom of the lower pad 22.

[0035] For example, the design of the upper die set and the lower die set enhances the overall structural stability and strength of the die by sequentially arranging different plate layers. The blanking punch 42 is connected to the upper pad 11 and penetrates multiple plate layers to achieve precise blanking control.

[0036] In some embodiments, reference Figures 1 to 3 The blanking station 4 also includes a temperature sensor, which is arranged at the bottom of the locking ring 43 and is used to detect the temperature in the blanking trough 40.

[0037] Exemplarily, the temperature sensor can quickly and accurately reflect changes in temperature information, accurately detect the temperature in the blanking chute 40, and ensure that the temperature in the chute is within a temperature range that allows bonding.

[0038] In some embodiments, reference Figures 1 to 3 A heat insulation layer is provided on one side of the blanking station 4 close to the multiple forming stations 3 along the first direction.

[0039] Exemplarily, by providing a heat insulating layer, it is possible to prevent heat from being transferred to the forming station 3 and affecting the product in the forming station 3 , and to stabilize the temperature in the blanking chute 40 .

[0040] In some embodiments, the blanking trough 40 is arranged along the third direction ( Figure 1 One side (shown in the Y direction) passes through the lower module assembly.

[0041] Exemplarily, by providing an opening at one side of the blanking chute 40, it is convenient to transport a plurality of stators and rotors that have been heated.

[0042] The above implementation modes are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A stamping die for a stator and rotor core with an in-mold heating function, wherein the material strip used to make the stator and rotor core is a self-adhesive coating material strip, and at least one of the upper and lower surfaces of the self-adhesive coating material strip is provided with a layer of self-adhesive coating film; characterized in that: The stator and rotor core stamping die comprises an upper die set and a lower die set, wherein: The lower die set is provided with a plurality of forming stations and blanking stations in sequence along the first direction, and the blanking station comprises a blanking trough, a carrying assembly and a heating assembly; the blanking trough is arranged at the top of the lower die set; the carrying assembly comprises a turntable and a driving device, and the turntable is arranged in the blanking trough for carrying the stator and rotor; the driving device is used to drive the turntable to move up and down relative to the lower die set along the first direction; the heating assembly surrounds the blanking trough and is arranged close to the top of the blanking trough, and is used to heat the plurality of stators and rotors carried by the turntable, and transfer the stators and rotors through the driving device.

2. The stator and rotor core stamping die according to claim 1, characterized in that: A blanking die is provided at the top of the blanking trough, and the upper die set is provided with a blanking punch corresponding to the blanking die, which is used to press the stator and rotor from the self-adhesive coating material strip into the blanking trough; a locking ring is provided below the blanking trough, and the locking ring is arranged around the blanking trough; an annular installation area is provided on the side of the locking ring away from the blanking trough, and the heating component is arranged in the annular installation area and is clamped and fixed with the locking ring.

3. The stator and rotor core stamping die according to claim 2, characterized in that: The heating component is one of a heating copper tube or an induction heating coil.

4. The stator and rotor core stamping die according to claim 3, characterized in that: The driving device includes a rotating top cylinder and a linear push rod. The rotating top cylinder is arranged at the bottom of the lower mold group and corresponds to the blanking chute. The linear push rod extends along the second direction, one end of which is connected to the bottom of the turntable, and the other end is passed through the lower mold group and connected to the rotating top cylinder, so as to drive the turntable to move through the rotating top cylinder.

5. The stator and rotor core stamping die according to claim 4, characterized in that: The upper die assembly is provided with an upper die seat, an upper pad, a convex fixing plate, a stripping plate seat and a stripping plate in sequence along the second direction, and the lower die assembly is provided with a concave fixing plate, a lower die seat and a lower pad in sequence along the second direction; the blanking punch is connected to the upper pad and penetrates the convex fixing plate, the stripping plate seat and the stripping plate; the blanking trough is arranged corresponding to the concave fixing plate, the lower die seat and the lower pad; the rotating top cylinder is arranged at the bottom of the lower pad.

6. The stator and rotor core stamping die according to claim 5, characterized in that: The blanking station also includes a temperature sensor, which is arranged at the bottom of the locking ring and is used to detect the temperature in the blanking trough.

7. The stamping die for the stator and rotor core according to claim 6, characterized in that: A heat insulation layer is provided on one side of the blanking station along the first direction close to the plurality of forming stations.

8. The stator and rotor core stamping die according to claim 7, characterized in that: The blanking chute is arranged along one side of the third direction and passes through the lower die assembly.

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