Winding device of stator rolling equipment and stator rolling equipment

Abstract

The present application discloses a winding device of a stator punching and rolling device and a stator punching and rolling device, wherein the winding device comprises: a winding seat; a winding wheel for winding a steel strip to form a stator lamination, comprising: a wheel body and a locking mechanism for fixing or unloading the stator lamination; a ramp frame tangent to the wheel surface of the winding wheel, comprising a ramp surface and a tension control device for controlling the winding tension of the winding wheel and making the bottom wheel surface of the stator lamination always tangent to the ramp surface. The winding device provided by the present application compensates for the deformation of the stator lamination itself or the winding wheel shaft caused by the increase of its own gravity by arranging a ramp frame on the winding device that can provide support for the stator lamination during the entire winding process, so that the punching slots and punching holes can accurately correspond to form tooth slots and stacking holes; and the winding tension of the winding wheel is controlled by arranging a tension control device, so that the steel strip can maintain appropriate tension during the entire winding process, thereby ensuring production quality.

Description

Technical Field

[0001] The present application relates to the technical field of axial flux motors, and in particular to a winding device and a stator rolling device for manufacturing a stator of an axial flux motor. Background Art

[0002] Axial flux motors are widely used in electric vehicles, wind power generation, aerospace and other fields due to their small size, light weight, high efficiency and high torque density. Axial flux motors are usually composed of a disc-shaped or ring-shaped stator and a rotor carrying magnets arranged axially, wherein the stator core is formed by stacked steel strips with multiple notches (or teeth) for winding coils, which convert electrical energy into mechanical energy using the principle of electromagnetic induction.

[0003] When manufacturing the stator core, the wound steel strip to be punched needs to be unwound by the steel strip unwinding device and sent to the stator punching equipment. Then, the punching device in the stator punching equipment is used to punch out multiple slots on the unwound steel strip. Then, the unwound steel strip with multiple slots is tightly wound by the winding device in the stator punching equipment, so that the slots on each circle of the steel strip can accurately correspond to each other, thereby forming tooth slots. In this process, the steel strip needs to maintain appropriate tension to ensure that the slots at the same position in different layers are on the same normal line, so that the slots can accurately form stator teeth (in some cases, they can be called stator tooth slots or stator slot teeth) for subsequent wire embedding or winding operations.

[0004] Among them, when using the winding device for winding operations, the operator needs to fix the first layer of stator laminate on the winding device. As the number of winding turns increases, the stator laminate will become heavier when wound on the winding device, and the gradually increasing gravity will cause a certain degree of deformation of the rotating shaft. This deformation will lead to a decrease in the winding accuracy of subsequent winding layers, which will in turn cause the punching grooves of each layer to fail to remain on the same normal line, which will directly lead to uneven tooth surfaces of the manufactured stator teeth, and then the subsequent wire embedding process cannot be carried out; furthermore, as the working time of the punching and rolling equipment increases and the number of winding turns increases, the winding accuracy may also be reduced due to the accumulation of working errors of the servo motor of the winding equipment, which will also bring about problems with the tooth slot accuracy of the stator core.

[0005] Therefore, how to ensure that the punching grooves of each layer of steel strip can accurately correspond to each other in the process of preparing the stator core to form high-precision tooth grooves has become a technical problem that needs to be solved urgently by technical personnel in this field. Summary of the invention

[0006] In view of the shortcomings of the related technologies mentioned above, the purpose of the present application is to provide a winding device and a stator punching and rolling device for a stator core, so as to solve the technical problems such as low precision of the stator core produced due to the deformation of the wound stator laminations and the inability to accurately correspond to the punching slots of each layer during the manufacturing process of the stator core.

[0007] To achieve the above-mentioned purpose and other related purposes, the first aspect of the present application provides a winding device of a stator punching and rolling equipment, comprising: a winding seat, which can be horizontally movably arranged on the base of the stator punching and rolling equipment; a winding wheel, which is arranged on the winding seat at a preset height and is used to intermittently wind the steel strip that has completed the stamping operation to form a stator laminate; comprising: a wheel body and at least two locking mechanisms arranged on the wheel body for fixing or unloading the stator laminate; a ramp frame, which is arranged on the base of the stator punching and rolling equipment in a state tangent to the wheel surface of the winding wheel, and comprises a ramp surface with a preset inclination angle for always keeping it tangent to the bottom wheel surface of the stator laminate during the winding operation of the winding wheel; and a tension control device, which is arranged on the base of the stator punching and rolling equipment and is traction-connected to the winding seat, and is used to control the winding tension of the winding wheel and make the bottom wheel surface of the stator laminate always keep it tangent to the ramp surface.

[0008] The second aspect of the present application provides a stator rolling device for an axial flux motor, comprising: a machine base, comprising a frame erected on a first side of the machine base, and a feed table mounted on the frame and inclined at a first preset angle relative to a horizontal plane; a stamping device, comprising a stamping table arranged on the machine base and connected to the feed table at an inclined angle of the first preset angle, a stamping mechanism mounted on the frame at a second preset angle and located on the upper side of the stamping table, and a mold mechanism arranged on the stamping table for stamping intermittently fed steel strips to form grooves and holes; a winding device as described in any embodiment of the first aspect of the present application; a plurality of tooth grooves and a plurality of stacked holes formed between every two adjacent tooth grooves are formed on each layer of steel strip in the stator stack; and a control device connected to the stamping device and the winding device, for controlling the stamping device to perform a stamping operation under a first instruction and controlling the winding device to perform a winding operation under a second instruction.

[0009] In summary, the stator punching and winding equipment and the winding device provided by the present application firstly provide a slope surface with a preset inclination angle so that the winding wheel always keeps tangent to the wheel surface at the bottom of the stator laminate during the winding operation, so that the slope surface can provide support for the stator laminate in the entire winding process, thereby compensating for the deformation of the stator laminate itself or the winding wheel shaft caused by the increase of its own gravity, so that the punching slots and holes can accurately correspond to form tooth slots and stacking holes, thereby ensuring the quality and accuracy of the stator laminate formed by winding; in addition, on the basis of the above, the present application also provides a connecting winding device by providing a connecting winding device. The tension control device of the winding seat controls the winding tension of the winding wheel, thereby ensuring that the steel strip can maintain appropriate tension and the moving stroke of the winding device throughout the entire winding process, and the tension control device allows the bottom wheel surface of the stator laminate to always remain tangent to the slope surface, so that the angular dimensions of the same group of tooth slots and stacked holes of the manufactured stator laminate always expand on the same normal line without misalignment, thereby further ensuring the quality and accuracy of the produced stator; furthermore, the present application also realizes rapid fixation or rapid unloading of the stator laminate by arranging an automatic locking mechanism on the winding wheel, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The specific features of the present application are shown in the attached claims. The features and advantages of the invention involved in the present application can be better understood by referring to the exemplary embodiments and drawings described in detail below. The drawings are briefly described as follows:

[0011] Figure 1 It is a schematic diagram of the structure of a stator rolling device in one embodiment of the present application.

[0012] Figure 2 Shown is a schematic structural diagram of a leveling device in one embodiment of the present application.

[0013] Figure 3 Shown is a schematic structural diagram of a stamping device in one embodiment of the present application.

[0014] Figure 4 and Figure 5 They are respectively shown as structural schematic diagrams of a mold mechanism being arranged in the first stamping space in one embodiment of the present application.

[0015] Figure 6 and Figure 7 Displayed as this application Figure 5 Schematic diagram of the disassembled structure of the mold mechanism in the illustrated embodiment.

[0016] Figure 8 Shown is a structural schematic diagram of a stamping switching mechanism in one embodiment of the present application.

[0017] Fig. 9It is a schematic diagram showing a switching pressing plate to press the first mold assembly in one embodiment of the present application.

[0018] Fig.10 It is a schematic diagram showing the switching of the pressing plate to press the second mold assembly in one embodiment of the present application.

[0019] Fig.11 It is a schematic structural diagram showing a winding device disposed on a machine base in one embodiment of the present application.

[0020] Fig.12 and Fig.13 They are respectively schematic diagrams of the structure of the winding device in one embodiment of the present application at different viewing angles.

[0021] Fig.14 It is a schematic diagram showing a section of a structure in which a steel strip is punched and wound into a stator in one embodiment of the present application.

[0022] Fig.15 It is a schematic diagram of a stator laminate structure formed by winding a stamped steel strip in one embodiment of the present application.

[0023] Fig.16 Shown is a schematic structural diagram of a stator ring in one embodiment of the present application.

[0024] Fig.17 and Fig.18 They are respectively schematic diagrams of the structure of the winding wheel in different states in one embodiment of the present application.

[0025] Fig.19 It is a schematic diagram of the exploded structure of the winding wheel in one embodiment of the present application.

[0026] Fig. 20 and Fig.21 Schematic diagrams of the first tooth-like structure and the second tooth-like structure in different states in one embodiment of the present application are respectively shown.

[0027] Fig. 22 Shown is a schematic structural diagram of a tension control device in one embodiment of the present application.

[0028] Fig.23 Shown is a schematic structural diagram of a stator rolling device in another embodiment of the present application.

[0029] Fig.24 It is a schematic diagram of the structure of the unwinding device of the stator coiling equipment in one embodiment of the present application.

[0030] Fig.25 Shown is a partially enlarged schematic diagram of an unwinding device in one embodiment of the present application. DETAILED DESCRIPTION

[0031] The following is an explanation of the implementation of the present application by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification.

[0032] In the following description, reference is sometimes made to the accompanying drawings, which describe several embodiments of the present application. It should be understood that other embodiments may also be used, and that changes in module or unit composition, electrical, and operation may be made without departing from the spirit and scope of the present application. The following detailed description should not be considered restrictive, and the scope of the embodiments of the present application is limited only by the claims that are published. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0033] It will be understood that, although in some instances the terms first, second, etc. may be used herein to describe various elements or parameters, these elements or parameters should not be limited by these terms. These terms are only used to distinguish one element or parameter from another element or parameter. For example, the first tensioning wheel may be referred to as the second tensioning wheel, and similarly, the second tensioning wheel may be referred to as the first tensioning wheel without departing from the scope of the various described embodiments. The first tensioning wheel and the second tensioning wheel are both describing a certain tensioning wheel, but unless the context clearly indicates otherwise, they are not the same tensioning wheel. Similar situations also include the first preset angle and the second preset angle, the first installation space and the second installation space, the first tooth-shaped structure and the second tooth-shaped structure, the first instruction and the second instruction, etc. The terms "or" and "and / or" used in this article are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means any of the following: A; B; C; A and B; A and C; B and C; A, B and C. An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some manner.

[0034] It will be understood that when a part or element is referred to as being "on" or extending "onto" another element, the element may be directly on or directly extending onto the other element, or intervening elements may also be present. Conversely, when an element is referred to as being "directly on" or "extending directly onto" another element, there are no intervening elements. It will also be understood that when an element is referred to as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intervening elements. Conversely, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements.

[0035] Relative terms such as "below" or "above" or "upper" or "lower" or "horizontal" or "vertical" may be used herein to describe the relationship of one element, layer or region to another element, layer or region as illustrated in the figure. It will be understood that these terms are intended to cover different device orientations other than the orientation depicted in the figure. In this application, the "vertical", "horizontal" and "parallel" are defined as: including the situation of ±10% based on the standard definition. For example, vertical usually refers to an angle of 90° relative to a reference line, but in this application, vertical refers to a situation within 80° to 100°.

[0036] The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application. When used herein, the singular forms "a", "an", and "the" are intended to also include the plural forms unless the context clearly indicates otherwise. It will also be understood that when used herein, the terms "comprise", "include", "include" and / or "comprising" specify the presence of stated features, integers, steps, operations, elements and / or parts, but do not exclude the presence or increase of one or more other features, integers, steps, operations, elements, parts and / or combinations thereof.

[0037] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It will also be understood that the terms used herein should be interpreted as having the meaning consistent with their meaning in the context of this specification and the relevant field, and should not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0038] Unless explicitly stated otherwise, comparative quantitative terms such as "above" and "below" are intended to encompass the concept of equality. As an example, "above" may not only mean "greater than" in a mathematical sense, but may also mean "equal to".

[0039] As described in the above background technology, ensuring that the punched grooves of each layer of steel strip can accurately correspond to each other to form high-precision tooth slots during the preparation of the stator core has become a technical problem that technical personnel in this field need to solve urgently; especially with the application of axial flux motors in more fields, the styles and specifications of stator cores have also become diverse. For example, if a stator core with a more complex structure needs to be manufactured, it is necessary to not only punch grooves on the steel strip, but also add other stamping structures to meet other needs. The complexity of the stamping structure of the steel strip will bring greater challenges to the winding accuracy of the winding device.

[0040] In view of this technical problem, the present application discloses a winding device and a stator rolling device for a stator rolling device. Firstly, a slope surface with a preset inclination angle is set so that the winding wheel always keeps tangent to the wheel surface at the bottom of the stator laminate during the winding operation, so that the slope surface can provide support for the stator laminate in the entire winding process, thereby compensating for the deformation of the stator laminate itself or the winding wheel shaft caused by the increasing gravity of the stator laminate, so that the punching grooves and holes can accurately correspond to form tooth grooves and stacking holes, thereby ensuring the quality and accuracy of the stator laminate formed by winding; in addition, on the basis of the above, the present application also adopts The winding tension of the winding wheel is controlled by setting a tension control device connected to the winding seat, thereby ensuring that the steel strip can maintain appropriate tension and the moving stroke of the winding device during the entire winding process; and the tension control device makes the bottom wheel surface of the stator laminate always remain tangent to the slope surface, so that the angular dimensions of the same group of tooth slots and stacked holes of the manufactured stator laminate always expand on the same normal line without misalignment, thereby further ensuring the quality and accuracy of the produced stator; furthermore, the present application also realizes rapid fixation or rapid unloading of the stator laminate by setting an automatic locking mechanism on the winding wheel, thereby improving production efficiency.

[0041] In order to clarify the definition of direction and the operation mode between different structures, a three-dimensional space defined by horizontal, vertical and vertical directions is defined in the embodiments disclosed in this application. The horizontal, vertical and vertical directions are all straight lines and are perpendicular to each other. For example, the length extension direction of the bottom of the base is defined as horizontal (e.g. Figure 1 The X direction in the figure), the width extension direction of the bottom of the base is defined as the longitudinal direction (for example Figure 1 The vertical direction is also called the vertical direction, or the up-down direction is defined as the vertical direction (e.g. Figure 1 The Z direction in the image).

[0042] The steel strip to be punched in some embodiments of the present application refers to a metal sheet material before punching and forming grooves and holes. Figure 2 or Fig.23 The steel strip 521 to be stamped is shown. The steel strip coil formed by winding the steel strip to be stamped is a coiled metal material made by a long and narrow metal sheet through a continuous rolling process, specifically in the form of Fig.23 The steel strip roll 52 shown. The steel strip roll includes an inner ring surface and an outer ring surface, and the inner ring surface can be fixed on the steel strip unwinding device 5. When unwinding, the steel strip located on the outer ring surface of the steel strip roll 52 starts to unwind from one end. The material of the steel strip roll 52 includes but is not limited to silicon steel and electrical steel. In some examples, in order to reduce the eddy current loss generated by the stator during use, the surface of the steel strip 521 is coated with insulating paint. In the actual production process of the stator, the steel strip roll 52 has a large weight due to the large number of windings.

[0043] The steel strip described in one embodiment of the present application refers to a steel strip to be stamped by a stamping device, and a punching slot and a punching hole are formed on the steel strip to be stamped. The stator lamination refers to an annular structure formed by winding the steel strip by a winding device.

[0044] In the present application, the stator may also be referred to as a stator core or a stator core wound with copper wire to form the axial flux motor in combination with a rotor sleeved on its outer side. The stator core of the axial flux motor manufactured by the stator rolling equipment in the embodiment of the present application is a stator core including a slotted structure and a punched hole structure, please refer to Fig.14 and Fig.15 , Fig.14 It is a schematic diagram showing a section of a structure in which a steel strip is formed into a stator after being stamped in one embodiment of the present application; Fig.15 The schematic diagram of the stator lamination structure formed by winding the stamped steel strip in one embodiment of the present application is shown. Fig.14 After a section of steel strip 521 is punched / blanked, the steel strip 521 passes through the punching device 2 of the stator rolling device to form a plurality of punching slots 351 and a plurality of punching holes 352 formed between every two adjacent punching slots 351. The punching slots 351 are punched and formed on the first side (such as Fig.14 The punch hole 352 is punched out on the second side of the steel strip 521 (as shown in FIG. Fig.14 As shown in the figure, when the width of the steel strip 521 is taken as the height, the punching slot 351 and the punching hole 352 are not at the same height, nor do they intersect in height. The axis of the punching hole 352, which is a radial pin hole, is located on the center line of the stator tooth formed between the tooth slots on both sides thereof.

[0045] like Fig.14 As shown, a stator tooth piece 353 is formed between two adjacent punching slots 351, and when multiple layers of stator tooth pieces are stacked together, a stator tooth 363 is formed (eg, Fig.15 As shown in ); in this embodiment, the stator teeth are, for example, dovetail teeth.

[0046] In the present application, in order to ensure that the punching grooves 351 and punching holes 352 at the same position in different layers are located on the same normal line (as shown in FIG. Fig.15 L shown 1 or L 2) so that the multiple layers of punching grooves 351 and punching holes 352 can accurately correspond, the spacing between the punching grooves 351 and 351 on different layers is different, and the spacing between the punching holes 352 and 352 is also different. For example, the spacing between the punching grooves 351 and 351 on the innermost circle of the steel strip 521 that is wound first is the smallest; and the spacing between the punching grooves 351 and 351 on the outermost circle of the steel strip 521 that is wound last is the largest; similarly, the spacing between the punching holes 352 and 352 punched on different layers is also distributed in this way.

[0047] In the present application, as the winding wheel 32 forms the stator lamination 36 through intermittent winding, a plurality of punched slots 351 and a plurality of punched holes 352 at the same position of different layers correspond to each other to form tooth slots 361 and stacked holes 362, respectively, thereby forming a plurality of tooth slots 361 and a plurality of stacked holes 362 formed between every two adjacent tooth slots 361 on the stator lamination 36, wherein the stacked holes 362 are a plurality of radial pin holes for cooperating with radially inserted pins, thereby making it no longer necessary for the stator lamination 36 to fix the wound laminations by interlayer welding.

[0048] The following combination Figures 1 to 25 The stator punching and rolling equipment of the present application is described in detail.

[0049] See also Figure 1 , which is a schematic structural diagram of a stator punching and rolling device in one embodiment of the present application. As shown in the figure, the stator punching and rolling device includes a machine base 1, a punching device 2, a winding device 3, and a control device 4.

[0050] In one embodiment, the base 1 is the main part of the stator rolling equipment, and has a stamping station and a winding station. The stamping station can be provided with a stamping device 2 for stamping the steel strip to form a stamping structure (also called a blanking structure) such as a slot and a hole. The winding station can be provided with a winding device 3 for winding the steel strip with multiple holes. The shapes of the stamping station and the winding station can be determined according to the range occupied by the stamping device 2 and the winding device 3 when they are working. Figure 1 As shown, the machine base 1 is rectangular in shape as a whole, and a stamping station and a winding station are arranged on the top thereof. The steel strip 521 is firstly stamped by the stamping device 2 located on the stamping station, and then wound by the winding device 3 located on the winding station. In the subsequent embodiments, the side of the machine base 1 where the stamping device 2 is arranged is referred to as the first side (i.e. Figure 1 The left side in the figure), the side of the base 1 where the winding device 3 is arranged away from the first side is called the second side (i.e. Figure 1 The first side and the second side will not be described in detail later.

[0051] In one example, the base 1 is heavy to provide a firm stability for the whole machine. In order to further give the base 1 sufficient durability and load-bearing capacity, the base 1 can be configured with materials such as cast iron, alloy, carbon structural steel, etc., so that the base 1 has sufficient durability and load-bearing capacity. In some examples, the base 1 includes a fixed structure or a limiting structure such as a base, a rod, a column, a frame, etc. for receiving different components in the stator punching equipment, which are all the bases described in this application. At the same time, in some examples, the base 1 can be an integrated base, and in other examples, the base 1 can include multiple independent bases.

[0052] In one embodiment, if Figure 1 As shown, the base 1 includes a frame 11 and a feed table 12, wherein the frame 11 is arranged on a first side of the base 1, and the feed table 12 is mounted on the frame 11 and is inclined at a first preset angle relative to the horizontal plane. In order to facilitate the installation of the feed table 12 on the frame 11, in this embodiment, the frame 11 is configured as a frame structure, and the connection method between the frame 11 and the feed table 12 includes but is not limited to bolt connection and welding. It should be understood that the feed table 12 is inclined at a first preset angle relative to the horizontal plane, so that the steel strip 521 can conform to the setting height of the winding device 3, thereby reducing the resistance of the steel strip 521 during the transportation process.

[0053] In one embodiment, if Figure 1 As shown, the first preset angle α of the feed table 12 relative to the horizontal plane is between 10° and 30°, for example, it can be approximately 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, or 30°, etc. Further, the first preset angle α of the feed table 12 relative to the horizontal plane is between 15° and 25°, for example, it can be approximately 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, or 25°, etc. Preferably, the first preset angle α of the feed table 12 relative to the horizontal plane is 18°.

[0054] It should be understood that when the steel strip 521 is punched by the punching device 2 located at the punching station, the section or area to be punched of the steel strip 521 needs to maintain a flat shape and stable tension at the punching station to ensure the accuracy and quality of the punching slots 351 and punching holes 352 formed by punching, and further ensure the accuracy and quality of the stator lamination 36 formed by subsequent winding. In view of this, the stator punching and rolling equipment described in the present application also includes a flattening device 13, such as Figure 1As shown, the flattening device 13 is disposed on the first side of the feeding table 12, and is used to flatten the steel strip 521 intermittently conveyed to the stamping table 21 for subsequent stamping operations. The stamping table 21 is used to provide support for the stamping operation of the stamping device 2 on the steel strip 521, and the details can be referred to the description in the subsequent embodiments.

[0055] In one embodiment, when the flattening device 13 receives the first instruction, it presses the steel strip 521 passing through so that the steel strip 521 on the stamping table 21 is in a tensioned state; and releases the steel strip 521 under the second instruction so that the section to be stamped of the steel strip 521 enters the stamping table 21. Among them, the first instruction is used to control the stamping device 2 to perform a stamping operation at the stamping station, and the second instruction is used to control the winding device 3 to perform a winding operation at the winding station. The execution of the first instruction and the second instruction is controlled by the control device 4, and the specific description can be referred to in the subsequent embodiments. That is, when the stamping device 2 is required to perform a stamping operation on the steel strip 521, the flattening device 13 presses the steel strip 521 to ensure the flatness of the steel strip 521 when entering the stamping table 21; when the steel strip 521 needs to move to the second side of the machine base 1, for example, when the winding device 3 is required to perform a winding operation on the steel strip after the stamping operation is completed, the flattening device 13 releases the steel strip 521.

[0056] See also Figure 2 Combined with Figure 1 ,in, Figure 2 The structure diagram of the leveling device in one embodiment of the present application is shown as follows: Figure 1 and Figure 2 As shown, the leveling device 13 includes a first clamping plate 131 and a second clamping plate 132. The first clamping plate 131 is arranged on the feeding table 12, and the second clamping plate 132 is arranged parallel to the first clamping plate 131, and is used to press or release the steel strip 521 passing by. Figure 2 In the example shown, the first clamping plate 131 and the second clamping plate 132 are both configured as rectangular flat plates. Of course, the first clamping plate 131 and the second clamping plate 132 can be configured in any shape. In some other examples, the first clamping plate 131 and the second clamping plate 132 can include a plurality of independent clamping plates. The materials of the first clamping plate 131 and the second clamping plate 132 include but are not limited to cast iron, alloy, and carbon structural steel.

[0057] In order to further achieve the pressing and releasing of the steel belt 521, in one embodiment, as Figure 2As shown, a plurality of clamping blocks 133 are respectively arranged on the first clamping plate 131 and the second clamping plate 132 in parallel and opposite to each other, and the plurality of clamping blocks 133 are used to directly contact the steel belt 521. In some examples, in order to increase the friction between the steel belt 521 and the clamping blocks 133 and prevent the relative sliding between the two, thereby ensuring the stability when pressing the steel belt 521, the clamping blocks 133 can be configured as materials with a high friction coefficient, such as silicone and rubber, which provide a buffering effect on the steel belt 521 while ensuring the pressing effect, thereby preventing mechanical damage to the surface of the steel belt 521 when pressing the steel belt 521, and further ensuring the quality of the produced stator. The clamping blocks 133 can be fixed to the first clamping plate 131 or the second clamping plate 132 by bolts or the like. Figure 2 In the example shown, three clamping blocks 133 are respectively configured on the first clamping plate 131 and the second clamping plate 132. Of course, any number of clamping blocks can be configured as long as the steel belt 521 can be pressed flatly and stably. This application does not impose any restrictions on this.

[0058] In order to prevent the steel strip 521 from deflecting during the pressing process, in one embodiment, two opposite sides of the first clamping plate 131 are provided with limiting components 134 for limiting the longitudinal position of the steel strip 521. Figure 2 In the illustrated embodiment, the limiting assembly 134 is configured as a bearing seat with a certain height, and a sliding groove is formed between the bottom of the bearing seat and the first clamping plate 131, and the sliding groove can realize the limiting of the steel strip 521 in the vertical direction. In this embodiment, the distance between the two limiting assemblies 134 arranged on the first clamping plate 131 along the longitudinal direction can be configured to be equal to the width of the steel strip 521, so as to realize the limiting of the steel strip 521 in the longitudinal direction. Of course, the limiting assembly 134 can be configured in any other form. For example, it can be configured as a guide groove that runs through the first clamping plate 131 horizontally, and the width of the guide groove is equal to that of the steel strip 521, so that the steel strip 521 can be just located in the guide groove, thereby preventing the steel strip 521 from deflecting during the pressing process. In some other embodiments, the limiting assembly 134 can also be configured as a baffle structure, and those skilled in the art can make any adjustment based on the form of the limiting structure under the enlightenment of this application.

[0059] exist Figure 2 In the example shown, two limiting components 134 are respectively provided on the first side and the second side of the first clamping plate 131, so that the steel belt 521 can be more stably limited between the first clamping plate 131 and the second clamping plate 132. Of course, in other examples, the limiting components 134 can also be configured in other numbers, for example, four are configured on the first side of the first clamping plate 131 and two are configured on the second side of the first clamping plate 131, or two are configured on the first side of the first clamping plate 131 and four are configured on the second side of the first clamping plate 131, but it is not limited thereto.

[0060] In order to drive the first clamping plate 131 or the second clamping plate 132 to perform the pressing or releasing operation, in one embodiment, the leveling device 13 includes at least one pneumatic component 135. In some examples, the pneumatic component 135 includes but is not limited to a cylinder with a telescopic rod, and the telescopic rod can be associated with the second clamping plate 132. In practical applications, the telescopic rod can be driven by the cylinder to perform a telescopic movement so that the telescopic rod drives the second clamping plate 132 to move, thereby causing the second clamping plate 132 to move in the vertical direction. For example, when the cylinder drives the telescopic rod to perform a contraction movement, the contracted telescopic rod pulls the second clamping plate 132, so that the second clamping plate 132 approaches the first clamping plate 131 until the steel belt 521 is pressed; when the cylinder drives the telescopic rod to perform an extension movement, the extended telescopic rod pushes the second clamping plate 132, so that the second clamping plate 132 moves away from the first clamping plate 131 to release the steel belt 521. Of course, the telescopic rod can also be associated with the first clamping plate 131 and the second clamping plate 132 at the same time. Specifically, when the cylinder drives the telescopic rod to retract, the retracted telescopic rod simultaneously pulls the first clamping plate 131 and the second clamping plate 132, so that the two are close to each other to achieve the compression of the steel belt 521; when the cylinder drives the telescopic rod to extend, the extended telescopic rod simultaneously pushes the first clamping plate 131 and the second clamping plate 132, so that the two are away from each other to achieve the release of the steel belt 521.

[0061] See also Figure 3 Combined with Figure 1 ,in, Figure 3 The schematic diagram of the structure of the stamping device in one embodiment of the present application is shown. As shown in the figure, the stamping device 2 includes a stamping table 21, a stamping mechanism 22, and a mold mechanism 23. The stamping table 21 is arranged on the machine base 1 and is obliquely connected with the feed table 12 at a first preset angle α. The stamping mechanism 22 is mounted on the frame 11 at a second preset angle γ and is located on the upper side of the stamping table 21. The mold mechanism 23 is arranged on the stamping table 21 and is used to stamp the intermittently fed steel strip 521 to form a punching groove 351 and a punching hole 352. In one example, as Figure 3 As shown, the second preset angle γ is perpendicular to the first preset angle α, that is, the stamping mechanism 22 is vertically arranged on the stamping table 21 .

[0062] In one embodiment, the stamping table 21 is made of high-strength materials such as cast iron or stainless steel, which has good rigidity and wear resistance, so as to withstand the pressure generated during the stamping process. In some examples, the surface of the stamping table 21 is smooth to reduce the friction between the steel strip 521 and the stamping table 21 during intermittent belt feeding, avoid scratches on the surface of the steel strip 521, and further ensure the quality of the produced stator.

[0063] In one embodiment, if Figure 3As shown, the stamping mechanism 22 includes an actuator 221 and a driving unit 222. The actuator 221 is mounted on the frame 11 at a second preset angle γ and is located on the upper side of the stamping table 21. The driving unit 222 is used to drive the actuator 221 to perform stamping movement. That is, the actuator 221 is perpendicular to the stamping table 21. It should be understood that the actuator 221 is perpendicular to the stamping table 21, so that the impact force generated during the stamping movement acts vertically on the steel strip 521, avoiding force transmission deviation caused by angle error, ensuring that the steel strip 521 is uniformly stressed during stamping, and reducing deformation caused by uneven force, thereby ensuring production quality. In one example, the actuator 221 is fixedly connected to the frame 11, and the fixed connection method includes but is not limited to bolt connection and welding.

[0064] In one embodiment, the actuator 221 includes a stamping piston 2211 and a punch 2212, the punch 2212 is arranged on the upper side of the stamping table 21 at a second preset angle γ through a plurality of guide columns 223, a first stamping space 224 for setting the mold mechanism 23 is formed between the punch 2212 and the stamping table 21, and a pressure plate reset element such as a spring is sleeved on each of the guide columns 223. It should be noted here that in order to distinguish it from the guide columns between the slotting movable die and the stamping table in the subsequent embodiments, the guide column 223 connecting the punch 2212 and the stamping table 21 is described as the first guide column 223, and the first guide column 223 is not repeated in the subsequent embodiments.

[0065] In one embodiment, if Figure 3 As shown, the punch 2212 is configured as a pressure plate structure, and the pressure plate structure can be configured as a square. When the actuator 221 is used for stamping, the punch 2212 moves along the first guide column 223 and applies a force to the mold mechanism 23 disposed in the first stamping space 224, so that the mold mechanism 23 stamps the steel strip in a direction perpendicular to the stamping table 21 to form a groove or a hole. In this embodiment, in order to ensure that the punch 2212 has sufficient force bearing capacity to ensure its service life, the material of the punch 2212 can be configured as high-strength materials such as cast iron, stainless steel, and carbon structural steel.

[0066] In one embodiment, if Figure 3As shown, the first guide column 223 is vertically arranged on the stamping table 21 and is movably connected to the actuator 221, the punch 2212, and the stamping table 21. In one example, the first guide column 223 is connected to the actuator 221, the punch 2212, and the stamping table 21 through a bearing. It should be understood that the first guide column 223 can ensure that the movement trajectory of the actuator 221 and the punch 2212 during the stamping process remains perpendicular to the stamping table 21 to provide a precise guiding effect, thereby avoiding the offset of the stamping movement to improve the processing accuracy. Furthermore, the first guide column 223 makes the impact force applied by the punch 2212 to the mold mechanism 23 uniform, thereby avoiding the deformation of the punching grooves and punching holes formed by the stamping due to uneven force on the mold mechanism 23, thereby ensuring the processing accuracy. In some examples, in order to reduce the friction between the first guide post 223 and the punch 2212, the first guide post 223 may be smoothed, for example, a lubricant may be coated on the surface of the first guide post 223 to ensure smooth movement during punching.

[0067] In this embodiment, the number of the first guide pillars 223 is configured as four, and the four first guide pillars 223 are respectively located at the four corners of the punch 2212 and the stamping table 21. Of course, the first guide pillars 223 can be configured as any number at any position. For example, the number of the first guide pillars 223 can be configured as two, and the two first guide pillars can be arranged at the diagonal positions of the punch 2212 and the stamping table 21. Those skilled in the art can make any adjustments according to the teachings of this application.

[0068] In the embodiment where the actuator 221 includes a stamping piston 2211, the stamping piston 2211 can cooperate with the driving unit 222 and the pressure plate reset element to drive the actuator 221 to perform a stamping movement. Specifically, the driving unit 222 can be associated with the stamping piston 2211 to drive the stamping piston 2211 to reciprocate in a direction perpendicular to the stamping table 21, and the stamping piston 2211 can be associated with the actuator 221 to convert the reciprocating motion of the stamping piston 2211 into a stamping motion of the actuator 221. After the actuator 221 descends in a direction perpendicular to the stamping table 21 to perform a stamping motion, it can rise under the action of the pressure plate reset element to return to the initial position. It should be noted that by controlling the driving force of the driving unit 222 and the stroke of the reciprocating motion of the stamping piston 2211, the stamping force acting on the steel strip 521 can be accurately controlled, thereby ensuring the accuracy of the punching grooves and punching holes formed by stamping. The actuator 221 is reset by the pressure plate reset element, so that the actuator 221 is quickly reset after completing a stamping movement to prepare for the next stamping movement, thereby reducing the time of each reciprocating stamping movement during the stamping operation and improving production efficiency. In one example, the pressure plate reset element can be, for example, a spring sleeved on the guide column.

[0069] In certain other embodiments, the drive unit 222 may include a screw and a drive motor, wherein the screw is arranged in a direction perpendicular to the stamping table 21 and connected to the actuator 221, and the drive motor is connected to the screw. In this way, the drive motor drives the screw to rotate, so that the actuator 221 can be lifted and lowered in a direction perpendicular to the stamping table 21, thereby driving the actuator 221 to perform stamping. The implementation method of the drive unit is not limited to this, and other components that can drive the actuator 221 to lift and lower in a direction perpendicular to the stamping table 21 are still used. For example, in certain other embodiments, the drive unit 222 may include a lifting rack, a drive gear meshing with the lifting rack, and a drive motor that drives the drive gear to rotate. In some examples, the drive motor may be configured as a servo motor, a hydraulic motor, or a cylinder.

[0070] In one embodiment, the driving unit 222 drives the execution component 221 to perform stamping movement, which is controlled by the control device 4 through a first instruction. For details, please refer to the subsequent description in the embodiment of the control device.

[0071] In one embodiment, see Figures 4 to 7 ,in, Figure 4 and Figure 5 They are respectively shown as schematic diagrams of the structure in which the mold mechanism is arranged in the first stamping space in one embodiment of the present application, Figure 6 and Figure 7 Displayed as this application Figure 5 The schematic diagram of the split structure of the mold mechanism in the embodiment shown is as follows: Figure 6 and Figure 7 As shown, the mold mechanism 23 includes a first mold assembly 231 and a second mold assembly 232. The first mold assembly 231 is used to punch the steel strip 521 passing through the stamping table 21 twice to form two adjacent punching grooves 351 respectively. The second mold assembly 232 is independently arranged relative to the first mold assembly 231 and is used to punch the steel strip 521 passing through the stamping table 21 once to form a punching hole 352. It should be understood that in order to punch the steel strip 521 on the stamping table 21 into Fig.14 The style shown in FIG. 1 is a plurality of punching grooves 351 formed by punching and a plurality of punching holes 352 formed between each two adjacent punching grooves 351. It is necessary to use the first die assembly 231 to punch the steel strip 521 twice in succession to form two adjacent punching grooves 351, thereby presenting a Figure 6 In the state shown in FIG. 1 , the second die assembly 232 is used to punch the steel strip 521 once to form a punch hole 352, thereby forming a Figure 7 Status shown.

[0072] In one embodiment, a plurality of hollow structures are provided on the first mold assembly 231 and the second mold assembly 232. It should be understood that the hollow structures can reduce the heat generated by repeated stamping and ensure the service life of the mold mechanism 23. In addition, the hollow structures can reduce the weight of the mold mechanism 23, thereby reducing the equipment load and improving production efficiency.

[0073] In one embodiment, if Figure 6 As shown, the first die assembly 231 includes a notching fixed die 2311 and a notching movable die 2312, and the notching movable die 2312 is used to impact the notching fixed die 2311. In this embodiment, the notching movable die 2312 is in a "concave" shape, and the notching movable die 2312 is located on the upper side of the notching fixed die 2311 so as to impact the notching fixed die 2311 from top to bottom, and both the notching fixed die 2311 and the notching movable die 2312 have a groove structure 23111 that matches the shape of the notch 351 on the steel strip 521. When it is necessary to punch and form the notch 351 on the steel strip 521, the driving unit 222 drives the stamping piston 2211 to perform a stamping movement along the first guide column 223, thereby driving the punch 2212 of the actuator 221 to perform a stamping movement in a direction perpendicular to the stamping table 21. Thereafter, the punch 2212 impacts the die mechanism 23 and causes the notching movable die 2312 to impact the notching fixed die 2311 . Then, the steel strip 521 forms a notch 351 through the groove structure 23111 under the joint impact of the notching movable die 2312 and the notching fixed die 2311 .

[0074] In one embodiment, if Figure 7 As shown, the second mold assembly 232 includes a punching fixed mold 2321 and a punching movable mold 2322, and the punching movable mold 2322 is used to impact the punching fixed mold 2321. In this embodiment, the punching movable mold 2322 has a "convex" shape structure corresponding to the above-mentioned "concave" shape structure of the slotting movable mold 2312, and can fit with the slotting movable mold 2312. And the punching movable mold 2322 is located on the upper side of the punching fixed mold 2321 to facilitate impacting the punching fixed mold 2321 from top to bottom. Figure 7In the example shown, a punching column 23221 is disposed on the punching movable die 2322, and correspondingly, a hole-shaped structure 23211 is provided on the punching fixed die 2321. When the punching movable die 2322 impacts the punching fixed die 2321, the punching column 23221 passes through the hole-shaped structure 23211 to punch out a punching hole 352 on the steel strip 521. Specifically, when it is necessary to punch out a punching hole 352 on the steel strip 521, the driving unit 222 drives the punching piston 2211 to perform a punching motion along the first guide column 223, thereby driving the punch 2212 of the actuator 221 to perform a punching motion in a direction perpendicular to the punching table 21. Thereafter, the punch 2212 impacts the die mechanism 23 and causes the punching movable die 2322 to impact the punching fixed die 2321 . Then, the steel strip 521 passes through the punching column 23221 under the joint impact of the punching movable die 2322 and the punching fixed die 2321 to form a punching hole 352 .

[0075] exist Figure 6 and Figure 7 In the example shown, the punching fixed die 2321 and the slotting fixed die 2311 can be configured as the same die. Specifically, the formation of the slot 351 and the punching hole 352 are achieved by respectively using the groove structure 23111 and the hole structure 23211 provided on the same die. Furthermore, the punching movable die 2322 and the slotting movable die 2312 are matched in shape. The above realizes the structural integration of the punching movable die 2322 and the slotting movable die 2312, as well as the punching fixed die 2321 and the slotting fixed die 2311 in shape, which greatly reduces the size of the stamping device. The working space required for the punching operation of the device 2 is reduced, the conveying distance of the steel strip is reduced, and the compactness of the production line is improved. In particular, after the punching movable die 2322 and the slotting movable die 2312, as well as the punching fixed die 2321 and the slotting fixed die 2311 are integrated in shape and structure, the steel strip 521 stays at the same position, and the punching / punching of the two structures at different positions can be completed by switching the action of the punching die set, thereby improving the space utilization rate while reducing the equipment error, and ensuring the accuracy of the punching and punching formed by the punching. In addition, the punch 2212 impacts the die mechanism 23, so that the steel strip 521 forms the slot 351 and the punching 352 under the joint impact of the slotting movable die 2312 and the slotting fixed die 2311, and the punching movable die 2322 and the punching fixed die 2321, respectively, which can ensure the accurate formation of the slot 351 and the punching 352, further improve the consistency of the formed slot 351 and the punching 352, and thus improve the production quality.

[0076] In this example, the second punching space 225 for punching the steel strip 521 passing through is formed between the punching movable die 2312 and the punching movable die 2321 and the punching table 21. Figure 6 and Figure 7As shown, the steel strip 521 passes through the second stamping space 225 horizontally, so that the steel strip 521 is impacted by the notching movable die 2312 and the notching fixed die 2311 in the second stamping space 225 to form a notch 351, and is impacted by the punching movable die 2322 and the punching fixed die 2321 to form a hole 352.

[0077] In one embodiment, at least one guide post and a mold resetting element sleeved on the at least one guide post are provided between the notching fixed die 2311 and the notching movable die 2312, between the notching movable die 2312 and the stamping table 21, between the punching fixed die 2321 and the punching movable die 2322, and between the punching movable die 2322 and the stamping table 21. It should be noted here that in order to distinguish from the first guide post 223 connecting the punch 2212 and the stamping table 21 described in the aforementioned embodiment, the guide post between the notching movable die 2312 and the stamping table 21, and between the punching movable die 2322 and the stamping table 21 are described as the second guide post, and the guide post between the notching fixed die 2311 and the notching movable die 2312, and between the punching fixed die 2321 and the punching movable die 2322 are described as the third guide post. The second guide post and the third guide post are not repeated in the subsequent embodiments.

[0078] In one example, if Figure 4 or Figure 5 As shown, the second guide column 226 is perpendicular to the stamping table 21 and is located on the inner side of the first guide column 223, and is movably connected to the stamping table 21, the slotting movable die 2312 and the punching movable die 2322 by, for example, connecting a shaft cylinder and a shaft sleeve. It should be understood that the second guide column 226 can ensure that the movement trajectory of the slotting movable die 2312 and the punching movable die 2322 during the stamping process remains perpendicular to the stamping table 21 to provide a precise guiding effect, thereby avoiding the offset of the stamping movement to improve the processing accuracy. Further, the second guide column 226 makes the impact force applied by the slotting movable die 2312 or the punching movable die 2322 to the slotting fixed die 2311 or the punching fixed die 2321 uniform, thereby avoiding the deformation of the slots and punching formed by the stamping of the steel strip 521 due to uneven force, thereby ensuring the processing accuracy. In some examples, in order to reduce the friction between the second guide post 226 and the punch 2212, the second guide post 226 may be smoothed, for example, a lubricant may be coated on the surface of the second guide post 226 to ensure smooth movement during punching.

[0079] In this example, the number of the second guide posts 226 is configured as four, but it is not limited thereto. For example, the number of the second guide posts 226 punching the slotting movable die 2312 or the punching movable die 2322 can be configured as two, and the two second guide posts can be arranged at diagonal positions of the slotting movable die 2312 and the punching movable die 2322. Those skilled in the art can make any adjustments according to the teachings of this application.

[0080] In one example, the third guide column (not shown) can be arranged inside the second guide column 226 to ensure that the moving track of the slotting movable die 2312 and the punching movable die 2322 when impacting the slotting fixed die 2311 or the punching fixed die 2321 remains perpendicular to the stamping table 21 to provide precise guidance, thereby avoiding the offset of the stamping movement and improving the processing accuracy. The specific setting method can be referred to the above description and will not be repeated here.

[0081] In one embodiment, the die reset element allows the slotting movable die 2312 and the punching movable die 2322 to descend in a direction perpendicular to the punching table 21 to perform a punching movement, and then quickly rise to return to the initial position to prepare for the next punching movement, thereby reducing the time of each reciprocating punching movement during the punching operation and improving production efficiency. In one example, the die reset element can be, for example, a spring.

[0082] In order to realize the switching between the first mold assembly and the second mold assembly, and then switch the punching of the punching slot or the punching hole, that is, in order to realize Figure 6 to Figure 7 The punching device 2 includes a punching switching mechanism 24. Figure 8 , which is a schematic diagram of the structure of the punching switching mechanism in one embodiment of the present application, such as Figure 8 As shown, the stamping switching mechanism 24 includes a switching plate 241 and a switching drive mechanism 242. The switching plate 241 is arranged between the stamping mechanism 22 and the die mechanism 23, and is used to select the first die assembly 231 or the second die assembly 232 for stamping according to a preset process. Specifically, when it is necessary to stamp the steel strip 521 located in the second stamping space 225 to form a notch 351, the switching drive mechanism 242 drives the switching plate 241 to impact the first die assembly 231, thereby causing the notch movable die 2312 to impact the notch fixed die 2311; when it is necessary to stamp the steel strip 521 located in the second stamping space 225 to form a punching hole 352, the switching drive mechanism 242 drives the switching plate 241 to impact the second die assembly 232, thereby causing the punching movable die 2322 to impact the punching fixed die 2321.

[0083] In one embodiment, if Figure 8 As shown, the switching driving mechanism 242 includes an advance and retreat mechanism 2421 and a driving motor 2422. The advance and retreat mechanism 2421 is arranged on the feeding table 12 to drive the switching pressing plate 241 to move, and the driving motor 2422 is used to drive the advance and retreat mechanism 2421. In this embodiment, the switching pressing plate 241 and the advance and retreat mechanism 2421 are connected through a plurality of guide columns, thereby providing a space for the switching pressing plate 241 to move downward when impacting the first mold assembly 231 or the second mold assembly 232.

[0084] In one embodiment, the switching plate 241 is slidably disposed on the lower surface 243 of the punching switching mechanism 24 through the two side guide rails 2431 formed by the lower surface 243 of the punching switching mechanism 24. Figure 8 As shown, the guide rail 2431 is arranged transversely on the lower surface 243 of the punching switching mechanism 24, and matchingly, a slider 24211 is arranged on the lower side of the advance and retreat mechanism 2421, and the slider 24211 is mounted on the guide rail 2431. In this embodiment, the switching drive mechanism 242 may also include a moving screw rod, and the moving screw rod is associated with the advance and retreat mechanism 2421. The moving screw rod and the driving motor 2422 can drive the advance and retreat mechanism 2421 arranged on the guide rail 2431 to move transversely, thereby realizing the transverse movement of the switching pressure plate 241. For example, the driving motor 2422 drives the moving screw to rotate forward, thereby driving the slider 24211 on the lower side of the advance and retreat mechanism 2421 to move rightward along the guide rail 2431 on the lower surface 243 of the stamping switching mechanism, thereby placing the switching plate 241 in an advanced state; the driving motor 2422 drives the moving screw to rotate reversely, thereby driving the slider 24211 on the lower side of the advance and retreat mechanism 2421 to move leftward along the guide rail 2431 on the lower surface 243 of the stamping switching mechanism, thereby placing the switching plate 241 in a backward state. In some implementations, the driving motor 2422 may be configured as a driving source such as a servo motor, a hydraulic motor, or a cylinder.

[0085] In one embodiment, the switching pressing plate 241 is used to press the first mold assembly 231 in the forward state and to press the second mold assembly 232 in the backward state. Fig. 9 and Fig.10 ,in, Fig. 9 It is a schematic diagram showing a switching press plate to press the first mold assembly in one embodiment of the present application. Fig.10 The schematic diagram of the switching pressing plate pressing the second mold assembly in one embodiment of the present application is shown. As mentioned above, the switching driving mechanism 242 drives the switching pressing plate 241 to Fig. 9 The punch 2212 is in the position shown in the figure, so that the punch 2212 impacts the first die assembly 231 under the drive of the driving unit 222, so that the slotting movable die 2312 impacts the slotting fixed die 2311, and then the steel strip 521 located in the second punching space 225 is impacted by the slotting movable die 2312 and the slotting fixed die 2311 and forms a slot 351 through the groove structure 23111. When punching is required to form a punching hole, the switching driving mechanism 242 drives the switching pressing plate 241 to Fig.10The position shown enables the punch 2212 to impact the second die assembly 232 under the drive of the driving unit 222, so that the punching movable die 2322 impacts the punching fixed die 2321, and then the steel strip 521 located in the second stamping space 225 is impacted by the punching movable die 2322 and the punching fixed die 2321 and forms a punching hole 352 through the hole structure 23211.

[0086] In one embodiment, if Fig.10 As shown, a first avoidance space 2411 corresponding to the first mold assembly 231 is formed on the switching platen 241, and the first avoidance space 2411 is used to avoid the first mold assembly 231 when the switching platen 241 punches the second mold assembly 232. In one implementation, the switching platen 241 includes a platen body 2410 and an arm structure 2413, and the arm structure 2413 extends from the edge of the switching platen 241. Fig.10 In the example shown, the suspended areas on both sides of the arm structure 2413 form the first avoidance space 2411. Specifically, the shape of the arm structure 2413 matches the shape of the punching movable die 2322. When the switching plate 241 punches the second die assembly 232, the arm structure 2413 contacts the punching movable die 2322. At the same time, the first avoidance space 2411 prevents the switching plate 241 from contacting the slotting movable die 2312, thereby causing the punching movable die 2322 to move downward relative to the slotting movable die 2312 and impact the punching fixed die 2321 to form the punching hole 352.

[0087] In one embodiment, if Fig. 9 As shown, a second avoidance space 2412 corresponding to the second mold assembly 232 is formed on the switching platen 241, and the second avoidance space 2412 is used to avoid the second mold assembly 232 when the switching platen 241 punches the first mold assembly 231. In one implementation, the second avoidance space 2412 is configured as a groove structure or a hole structure formed on the platen body 2410. Specifically, the shape of the groove structure or the hole structure matches the shape of the punching movable die 2322. When the switching platen 241 punches the first mold assembly 231, the second avoidance space 2412 prevents the switching platen 241 from contacting the punching movable die 2322. At the same time, the platen body 2410 hits the slotting movable die 2312, thereby causing the slotting movable die 2312 to move downward relative to the punching movable die 2322 and impact the slotting fixed die 2311 to form the slot 351.

[0088] In one embodiment, if Fig. 9 and Fig.10As shown, the punching table 21 is provided with a hole die 233 corresponding to the notching fixed die 2311 and the punching fixed die 2321. Specifically, the hole die 233 has a groove structure corresponding to the groove structure 23111 on the notching fixed die 2311, and has a hole structure corresponding to the hole structure 23211 on the punching fixed die 2321. It should be understood that when the steel strip 521 is located between the hole die 233 and the notching fixed die 2311, the groove structure 23111 and the groove structure on the hole die 233 ensure the consistency of the punching groove 351 formed by punching. When the steel strip 521 is located between the hole die 233 and the punching fixed die 2321, the hole structure 23211 and the hole structure on the hole die 233 ensure the consistency of the punching hole 352 formed by punching, thereby ensuring the stability during the processing and further ensuring the production quality.

[0089] In one embodiment, if Figure 4 As shown, a recovery assembly 25 is provided at the lower side of the stamping table 21, and the recovery assembly 25 is used to receive the stamping waste falling through the hole die 233. It should be understood that the recovery assembly 25 can collect and clean up the stamping waste generated during the stamping process in a timely manner, and prevent the stamping waste from accumulating on the stamping station, thereby reducing the time for operators to clean up the waste while ensuring a clean production environment, and improving the overall production efficiency.

[0090] The following combination Figures 3 to 10 The operation process of the punching device 2 of the present application is described in detail:

[0091] First, the steel strip 521 is flattened by the flattening device 13 and enters the stamping station. The switching drive mechanism 242 drives the switching pressing plate 241 to Fig. 9 The position shown in the figure makes the punch 2212 impact the first die assembly 231 under the drive of the driving unit 222. At this time, the second avoidance space 2412 prevents the switching plate 241 from contacting the punching movable die 2322. At the same time, the plate body 2410 touches the slotting movable die 2312, so that the slotting movable die 2312 moves downward relative to the punching movable die 2322 and impacts the slotting fixed die 2311. Then, the steel strip 521 located in the second punching space 225 is impacted by the slotting movable die 2312 and the slotting fixed die 2311 and forms the first slot 351 through the groove structure 23111. After the first slot 351 is punched, the slotting movable die 2312 moves upward under the action of the die reset element to return to the initial position.

[0092] Thereafter, the steel belt 521 advances a certain distance (eg Fig.14The movable die 2312 repeats the above-mentioned action to punch a second punching groove 351 on the steel strip 521 through the groove structure 23111. After the punching of the second punching groove 351 is completed, the movable die 2312 moves upward under the action of the die reset element to return to the initial position again. In this way, the steel strip 521 is impacted by the first die assembly 231 twice in succession to form two adjacent punching grooves 351.

[0093] Then, the steel belt moves forward again by a predetermined distance (for example Fig.14 The distance between the punching slot 351 and the adjacent punching hole 352), the switching driving mechanism 242 drives the switching pressing plate 241 to Fig.10 In the position shown, the punch 2212 impacts the second die assembly 232 under the drive of the driving unit 222. At this time, the arm structure 2413 contacts the punching movable die 2322. At the same time, the first avoidance space 2411 prevents the switching plate 241 from contacting the slotting movable die 2312, so that the punching movable die 2322 moves downward relative to the slotting movable die 2312 and impacts the punching fixed die 2321. Finally, the steel strip 521 located in the second punching space 225 is impacted by the punching movable die 2322 and the punching fixed die 2321 and forms a punching hole 352 through the hole structure 23211. After the punching hole 352 is punched, the punching movable die 2322 moves upward under the action of the die reset element to return to the initial position.

[0094] In this way, during the continuous forward movement of the steel strip 521, two adjacent punching grooves are formed under the impact of the first mold assembly 231 twice, and a punching hole is formed under the impact of the first mold assembly 231. The first mold assembly 231 and the second mold assembly 232 work in a cycle until the entire steel strip is processed. It should be noted that in the related art, the steel strip 521 needs to retreat when switching the punching operation or the punching operation, and the dimensional error caused by the steel strip 521 during the retreat process will cause the punching grooves 351 and the punching holes 352 formed by the processing to be difficult to accurately correspond when the steel strip is subsequently wound, affecting the product quality. In the present application, the entire steel strip 521 is always in a forward state during the process of being punched to form the punching grooves 351 and the punching holes 352. It only selectively realizes the punching operation or the punching operation through the relative movement of the punching movable mold 2312 and the punching movable mold 2322 under the action of the punching switching mechanism, thereby avoiding the dimensional error caused by the retreat of the steel strip and ensuring the product quality.

[0095] It can be known from the operation process of the stamping device of the present application that the present application sets up a mold mechanism that can punch grooves and holes in the steel strip, so that the mold assembly for punching grooves and the mold assembly for punching holes are integrated on the same mold mechanism, and the switching between the first mold assembly and the second mold assembly is achieved by means of a switching drive mechanism, so that the steel strip can complete the stamping / blanking of two structures at different positions on the same stop station. The present application improves space utilization while reducing equipment errors, ensuring the accuracy of the grooves and holes formed by stamping, so that the grooves and holes of the wound stacked layers in the subsequent process can accurately correspond to form tooth grooves and stacked holes, thereby improving the winding accuracy and stacking quality of the produced stator stacking.

[0096] As mentioned above, when using the winding device for winding operations, the operator needs to fix the first layer of stator lamination on the winding device. As the number of winding turns increases, the stator lamination will become heavier when wound on the winding device, and the gradually increasing gravity will cause a certain degree of deformation of the rotating shaft. This deformation will lead to a decrease in the winding accuracy of subsequent winding layers, which in turn will cause the punching grooves of each layer to fail to remain on the same normal line, which will directly lead to uneven tooth surfaces of the manufactured stator teeth, and then the subsequent wire embedding process cannot be carried out; furthermore, as the working time of the punching and rolling equipment increases and the number of winding turns increases, the winding accuracy may also be reduced due to the accumulation of working errors of the servo motor of the winding equipment, which will also bring about problems with the tooth slot accuracy of the stator core. In view of this, the stator punching and rolling equipment described in the present application also includes a winding device, which can compensate for the deformation of the stator laminate itself or the winding wheel shaft caused by the increase in its own gravity, so that the punching grooves and holes can accurately correspond to form tooth grooves and stacked holes, and while providing support for the stator laminate during the entire winding process, it can maintain appropriate tension in the steel strip, thereby ensuring the production efficiency, quality and precision of the stator.

[0097] See also Figures 11 to 13 Combined with Figure 1 ,in, Fig.11 It is a schematic diagram showing a winding device arranged on a machine base in one embodiment of the present application. Fig.12 and Fig.13 The winding device 3 is arranged on the second side of the base 1 away from the first side, and includes a winding seat 31, a winding wheel 32, a ramp 33, and a tension control device 34.

[0098] In one embodiment, if Figure 1 As shown, during the stamping operation, the steel strip about to enter the outermost layer on the winding wheel 32 is on the same straight line inclined at the first preset angle α as are the steel strips on the stamping table 12 and the feeding table 21 .

[0099] In one embodiment, the winding seat 31 is horizontally movable on the base 1 of the stator punching and rolling device. In other words, the winding seat 31 can be laterally moved from the first side of the base 1 to the second side, or from the second side of the base 1 to the first side. In the example where the winding seat 31 moves laterally from the first side of the base 1 to the second side, the winding tension of the winding wheel 32 can be controlled in cooperation with the tension control device 34. In the example where the winding seat 31 moves laterally from the second side of the base 1 to the first side, the winding wheel 32 can be reset in cooperation with the tension control device 34. The tension control process and reset process of the winding wheel 32 can refer to the description in the subsequent embodiments, which will not be repeated here.

[0100] In one embodiment, if Fig.13 As shown, a winding mechanism 311 is provided in the winding seat 31, and the winding mechanism 311 is used to drive the winding wheel 32. In this embodiment, the winding mechanism 311 includes a winding motor 3111 and a reducer 3112. It should be understood that the torque directly output by the winding motor 3111 is relatively small and the speed is high, which is not suitable for driving the winding wheel 32 alone. In view of this, the reducer 3112 can be used to convert the high speed and low torque output by the winding motor 3111 into a low speed and high torque suitable for the winding wheel 32 to perform the winding operation, so as to better control the speed and force in the winding process and ensure the tightness and uniformity of the steel strip winding. In one example, the reducer 3112 is connected to the winding motor 3111 through a synchronous belt. Specifically, the synchronous belt can connect the output shaft of the winding motor 3111 and the input shaft of the reducer 3112, so that the power generated by the winding motor 3111 is transmitted to the reducer 3112 through the input shaft of the reducer 3112. Of course, in some other examples, the reducer 3112 and the winding motor 3111 can be connected by a chain or a gear, and the specific power transmission method is determined according to actual production requirements. Further, the reduction ratio of the reducer 3112 can also be determined according to actual production requirements, and this application does not impose any restrictions. In some examples, the type of the winding motor 3111 includes but is not limited to a flux motor, a stepper motor, and a servo motor.

[0101] In one embodiment, if Fig.13 As shown, the winding seat 31 includes a first installation space 312, a second installation space 313, and a third installation space 314. The first installation space 312 is arranged at the bottom of the winding seat 31, and is used to arrange the tension control device 34. The second installation space 313 and the third installation space 314 are located on the upper side of the first installation space 312, wherein the winding motor 3111 and the reducer 3112 are arranged in the second installation space 313. Fig.13In the example shown, the winding motor 3111 is located at the second side of the second installation space 313, and the reducer 3111 is located at the first side of the second installation space 313. The third installation space 314 and the second installation space 313 are longitudinally arranged along the upper side of the winding seat 31, and further, the third installation space 314 is arranged on a side close to the winding wheel 32.

[0102] In one implementation, the first installation space 312, the second installation space 313, and the third installation space 314 can be isolated as relatively independent areas by setting a plurality of installation plates. The winding motor 3111 and the reducer 3112 can be connected to the installation plates on both sides of the second installation space 313 by bolts and screw holes. In addition, the connection between each installation plate and the connection between the installation plate and the winding seat 31 include but are not limited to welding, mortise and tenon connection or screw fixing. In one example, in order to be sufficient to bear the weight of the winding mechanism 311 and thus ensure the stability of the winding mechanism 311, the plurality of installation plates can be configured to be made of steel or aluminum alloy. In one example, in order to prevent the vibration generated by the winding mechanism 311 during operation from causing mechanical damage to the installation plate, the winding mechanism 311 can be suspended in the second installation space 313. Of course, in some other examples, a shock-absorbing pad can also be set between the installation plate and the winding mechanism 311, and the material of the shock-absorbing pad can be, for example, an elastic material such as rubber or polyurethane.

[0103] In one embodiment, if Figure 1 and Fig.11 As shown, the winding wheel 32 is arranged on the winding seat 31 at a preset height, and is used to intermittently wind the stamped steel strip 35 to form the stator lamination 36. It should be understood that the preset height can ensure that the steel strip maintains a consistent tension during the winding process, thereby ensuring the quality of the formed stator lamination, and at the same time helps to reduce the friction between the winding wheel 32 and other components, thereby ensuring the service life of the winding device.

[0104] In one embodiment, if Fig.14 and Fig.15As shown, the steel strip 35 after the stamping operation is formed with a plurality of punching slots 351 formed by punching of the stamping device 2 and a plurality of punching holes 352 formed between every two adjacent punching slots 351. As the winding wheel 32 is intermittently wound to form the stator lamination 36, the plurality of punching slots 351 and the plurality of punching holes 352 at the same position of different layers respectively correspond to each other to form tooth slots 361 and stacking holes 362, thereby forming a plurality of tooth slots 361 and a plurality of stacking holes 362 formed between every two adjacent tooth slots 361 on the stator lamination 36. It should be understood that the tooth slots 361 can be used to accommodate the coil windings of the axial flux motor, and the magnetic flux is concentrated in the tooth slot area through electromagnetic induction, thereby effectively improving the magnetic flux density and efficiency of the axial flux motor. In one embodiment, the stacking holes 362 can also be used to enhance the heat dissipation performance of the stator lamination during the use of the axial flux motor, while reducing the eddy current loss of the axial flux motor, thereby improving the efficiency of the motor. Furthermore, in order to facilitate heat dissipation of the stator lamination and subsequent winding operations, the punching slots 351 and punching holes 352 at the same position in different layers need to be located on the same normal line (in a manner similar to Fig.15 L shown 1 or L 2 ) so that the multi-layered slots 351 and holes 352 can accurately correspond, that is, the angular dimensions of the same set of tooth slots and holes of the stator laminations always expand on the same normal line without misalignment.

[0105] It is necessary to explain here that Fig.15 This is just an example, Fig.15 As shown, the plurality of tooth slots 361 and the plurality of stacked holes 362 on the stator lamination 36 are evenly distributed on the circumferential surface thereof, and the tooth slots 361 are arranged vertically on the circumferential surface to ensure the symmetry and uniformity of the magnetic flux path. Of course, in certain other embodiments, the plurality of tooth slots 361 may be arranged obliquely on the circumferential surface of the stator lamination 36, and may be arranged in a staggered manner on the circumferential surface. The specific structure of the stator lamination is determined according to the specific application requirements of the axial flux motor, and the winding device described in the present application is suitable for winding various types of stator laminations.

[0106] As mentioned above, on the one hand, when the punching device 2 is used to punch the steel strip, it is necessary to reserve working time for the formation of the punching grooves and holes, so the steel strip in the punching device 2 needs to be fed intermittently. Since the winding wheel 32 in the winding device 3 is connected to the punching device 2 through the steel strip, the winding device 3 needs to intermittently wind the stamped steel strip in order to ensure the stability of the tension on the steel strip.

[0107] On the other hand, when the steel strip 35 that has completed the stamping operation is wound by the winding wheel 32 to form the stator stack 36, it is necessary to ensure that the punching slots 351 and punching holes 352 at the same position of different layers are located on the same normal line, so that they can accurately correspond to form the tooth slots 361 and the stacking holes 362. In view of this, the intermittent winding method can adjust the parameters such as the winding tension and speed within the time interval of each winding, so as to adapt to the parameter requirements between different layers, and further ensure the accuracy of the formed tooth slots and stacking holes.

[0108] In one embodiment, the length of each intermittently wound steel strip is controlled by the winding mechanism 311 according to the layer data of the steel strip wound on the winding wheel 32. For example, after the winding wheel 32 completes the winding of a specific number of layers of the steel strip, the winding mechanism 311 temporarily stops winding. At this time, the tension control device timely adjusts the tension on the steel strip so that the winding layer formed by this winding can be tightly wound on the previous layer. In this way, by controlling the length of each intermittently wound steel strip and the tension on the wound steel strip, the compactness and accuracy of the formed stator lamination can be guaranteed.

[0109] In some implementations, the layer data of the steel strip wound on the winding wheel 32 can be obtained by setting a length sensor or a layer number sensor such as an encoder, a laser rangefinder, etc., and the layer data is fed back to the control device 4. The control device 4 sends a control instruction and / or a detection signal according to the layer data, and controls the start and stop of the winding mechanism 311 according to the control instruction and / or the detection signal to control the length of the wound steel strip. At the same time, the control device 4 can control the tension control device 34 to adjust the tension on the wound steel strip. The specific adjustment process of the tension control device 34 on the tension of the steel strip can be referred to the description in the subsequent embodiments, which will not be repeated here.

[0110] In one embodiment, if Fig.13 As shown, the winding wheel 32 is arranged on the output shaft 31121 of the reducer 3112. As mentioned above, the power generated by the winding motor 3111 is transmitted from the output shaft of the winding motor 3111 to the input shaft of the reducer 3112 through the synchronous belt, and then the power can be transmitted from the input shaft of the reducer 3112 to the winding wheel 32 via the output shaft 31121 of the reducer 3112, so that the winding wheel 32 can rotate around the output shaft 31121 of the reducer 3112, thereby realizing the intermittent winding of the steel strip 35 that has completed the stamping operation to form the stator lamination 36.

[0111] exist Fig.13In the illustrated embodiment, the winding wheel 32 is arranged on the outer side wall of the third installation space 314 by passing through the output shaft 31121 of the reducer 3112 in the third installation space 314. Specifically, through holes are arranged on the installation plates on both sides of the third installation space 314, and the through holes can be passed through by the output shaft 31121 of the reducer 3112. Further, the winding wheel 32 can be connected to the output shaft 31121 of the reducer 3112 through a flange, but it is not limited thereto. The winding wheel 32 can be rotatably connected to the output shaft 31121 of the reducer 3112 in any manner and be arranged on the outer side wall of the third installation space 314. The specific implementation method is determined according to actual production requirements, and those skilled in the art can make any adjustments based on different functional requirements under the enlightenment of this application.

[0112] In one embodiment, if Figure 1 As shown, in order to wind the steel strip to form the stator stack 36, the winding device 3 further includes a stator ring 37. Fig.16 , which is a schematic diagram of the structure of the stator ring in one embodiment of the present application, such as Fig.16 As shown, the stator ring 37 is an annular structure having an inner annular surface and an outer annular surface. The outer annular surface is used to wind the steel strip to form the stator lamination. The diameter of the inner annular surface is adapted to the winding wheel 32 so that the stator ring 37 can be sleeved on the winding wheel 32. Further, a clamping groove 371 is provided on the inner annular surface of the stator ring 37. The clamping groove 371 can cooperate with the locking mechanism on the winding wheel 32 to achieve the fixing or unloading of the stator lamination. The specific structure and function of the locking mechanism can be referred to the description in the subsequent embodiments.

[0113] In one embodiment, see Fig.17 and Fig.18 , respectively, are schematic diagrams showing the structure of the winding wheel in different states in one embodiment of the present application. As shown in the figure, the winding wheel 32 includes a wheel body 321 and a locking mechanism 322. The locking mechanism 322 is disposed on the wheel body 321 and is used to fix or unload the stator lamination. For example, when the locking mechanism 322 is as shown in Fig.17 In the state shown, the stator lamination can be fixed to the winding wheel 32; when the locking mechanism 322 is as shown Fig.18 In the state shown, the stator stack can be unloaded from the winding wheel 32.

[0114] In one embodiment, the wheel body 321 is in a circular ring shape, and the center of the circular ring can be connected to the output shaft 31121 of the reducer 3112, thereby driving the wheel body 321 to rotate, thereby realizing the winding of the steel belt to form the stator lamination.

[0115] In one embodiment, the number of the locking mechanisms 322 is at least two. Fig.17 and Fig.18 In the example shown, four locking mechanisms 322 are provided, and the four locking mechanisms 322 are evenly arranged along the circumferential surface of the wheel body 321. In other examples, the number of locking mechanisms 322 may also be two, three, or more than four, as long as the stator lamination can be fixed or unloaded, and the present application does not impose any limitation on this.

[0116] See also Fig.19 , which is a schematic diagram of the exploded structure of the winding wheel in one embodiment of the present application, such as Fig.19 As shown, the locking mechanism 322 includes a groove 3221 and a locking assembly 3222. The groove 3221 is opened on the wheel surface of the wheel body 321. The locking assembly 3222 includes a clamping seat 32221 and a clamping block 32222. The clamping seat 32221 is arranged in the groove 3221. The clamping block 32222 is arranged in the clamping seat 32221 and can extend from the wheel surface of the wheel body 321 to engage with the clamping groove 371 on the stator ring 37 or retract into the wheel surface of the wheel body 321 to disengage from the clamping groove 371.

[0117] That is, in the example where the block 32222 extends out of the wheel surface of the wheel body 321, the locking assembly 3222 protrudes out of the groove 3221, so that the locking mechanism 322 appears as follows: Fig.17 The state shown in the figure makes the locking mechanism 322 engage with the clamping groove 371 on the stator ring 37 to fix the stator lamination. In the example where the clamping block 32222 is retracted into the wheel surface of the wheel body 321, the locking assembly 3222 is filled in the groove 3221, so that the locking mechanism 322 appears as shown in the figure. Fig.18 The state shown in the figure enables the locking mechanism 322 to be disengaged from the clamping groove 371 on the stator ring 37, and at this time, the stator lamination can be unloaded from the winding wheel 32 together with the stator ring 37. In other words, the longitudinal movement of the clamping block 32222 relative to the wheel surface of the wheel body 321 can be converted into the vertical movement of the locking assembly 3222 relative to the groove 3221.

[0118] In order to convert the longitudinal movement of the block 32222 into the vertical movement of the locking assembly 3222, in one embodiment, as shown in FIG. Fig.19 As shown, the portion of the holder 32221 corresponding to the engaging block 32222 is provided with a first tooth-like structure 322211, and the block 32222 is matched with a second tooth-like structure 322221, and the second tooth-like structure 322221 can be matched with the first tooth-like structure 322211. In the embodiment described in the present application, the first tooth-like structure 322211 is fixed in the holder 32221. In one example, the top of the first tooth-like structure 322211 and the top of the holder 32221 can be connected by screws.

[0119] See also Fig. 20 and Fig.21 , respectively, are schematic diagrams showing the first tooth-like structure and the second tooth-like structure in different states in one embodiment of the present application. Fig. 20 In the example shown, that is, when the first tooth-like structure 322211 and the second tooth-like structure 322221 are staggered, the block 32222 is in a state of extending out of the wheel surface of the wheel body 321. At this time, the locking mechanism 322 is as follows: Fig.17 The state shown in the figure makes the locking mechanism 322 engage with the slot 371 on the stator ring 37 to fix the stator lamination. Fig.21 In the example shown, that is, when the first tooth-like structure 322211 and the second tooth-like structure 322221 are engaged with each other, the block 32222 is in a state of being retracted into the wheel surface of the wheel body 321. At this time, the locking mechanism 322 is as follows: Fig.18 The state shown in the figure enables the locking mechanism 322 to be disengaged from the locking groove 371 on the stator ring 37 , and the stator lamination can be unloaded from the winding wheel 32 together with the stator ring 37 .

[0120] It should be understood that when the first tooth-like structure 322211 and the second tooth-like structure 322221 switch from a mutually staggered state to a mutually engaged state, that is, Fig. 20 The status shown switches to Fig.21 In the state shown, the height between the first tooth-like structure 322211 and the second tooth-like structure 322221 is h 1 Down to h 2 , that is, the vertical movement distance of the locking assembly 3222 relative to the groove 3221 is h 1 and h 2 In one example, h 1 and h 2 The height difference is 3 mm, but is not limited thereto, as long as the vertical movement of the locking assembly 3222 relative to the groove 3221 can be achieved and the fixing or unloading of the stator lamination can be achieved.

[0121] In order to achieve the extension and retraction of the block 32222 relative to the wheel surface of the wheel body 321, in one embodiment, the locking mechanism 322 includes a driving cylinder (not shown) and a driving rod 3223, wherein the driving cylinder is disposed on the winding seat 31, and the driving rod 3223 is connected to the driving cylinder and is parallel to the axial direction of the wheel body 321. Fig. 20 and Fig.21 As shown, the end of the driving rod 3223 is connected to the second tooth-shaped structure 322221 of the block 32222 to drive the second tooth-shaped structure 322221 to move along the axial direction (ie, the longitudinal direction) parallel to the wheel body 321 .

[0122] The following combination Figures 16 to 21 The working process of the locking mechanism 322 of the present application to fix or unload the stator lamination is described in detail.

[0123] When the winding device 3 winds the stamped steel strip on the stator ring 37 to form a stator lamination, the first tooth-like structure 322211 and the second tooth-like structure 322221 are staggered and present as follows: Fig. 20 In the state shown in FIG. 1 , the block 32222 extends out of the wheel surface of the wheel body 321, so that the locking mechanism 322 is as shown in FIG. Fig.17 The state shown in the figure makes the locking mechanism 322 engage with the card slot 371 on the stator ring 37, so that the stator laminate and the stator ring 37 are fixed to the winding wheel 32. When the winding is completed and the stator laminate needs to be unloaded from the winding wheel 32, the driving cylinder can be started to make the driving cylinder contact the end of the driving rod 3223, so that the second tooth-shaped structure 322221 is parallel to the axial direction of the wheel body 321 (in the shape of Fig.21 The first tooth-like structure 322211 and the second tooth-like structure 322221 are engaged with each other and switched to Fig.21 In the state shown in FIG. 1 , the block 32222 is retracted into the wheel surface of the wheel body 321, and the locking mechanism 322 is as shown in FIG. Fig.18 The state shown in the figure enables the locking mechanism 322 to be disengaged from the locking groove 371 on the stator ring 37 , and the stator lamination can be unloaded from the winding wheel 32 together with the stator ring 37 .

[0124] In one embodiment, if Fig.11 and Fig.12 As shown, the ramp frame 33 is arranged on the base 1 of the stator punching and rolling equipment in a state of being tangent to the wheel surface of the winding wheel 32. Furthermore, the ramp frame 33 includes a ramp surface 331, and the ramp surface 331 is at a preset inclination angle, so as to always be tangent to the bottom wheel surface of the stator lamination during the winding operation of the winding wheel 32. It should be noted here that, in this embodiment, the state in which the bottom wheel surface of the stator lamination is tangent to the ramp surface 331 can, on the one hand, visually indicate to the operator whether the winding process is proceeding smoothly. For example, when the bottom wheel surface of the stator lamination is not tangent to or does not contact the ramp surface 331, it can intuitively indicate to the operator that the winding process is abnormal, so that the operator can make timely adjustments to the winding device to ensure the smooth progress of the winding process. In this example, a pressure sensor and an alarm may be installed on the ramp surface 331. The pressure sensor may detect whether the ramp surface 331 and the stator lamination are in a tangent state by sensing the pressure change at the contact position between the ramp surface 331 and the stator lamination. When the ramp surface 331 and the stator lamination are not tangent, the alarm may sound an alarm to provide instructions to the operator.

[0125] On the other hand, when the bottom wheel surface of the stator lamination is tangent to the ramp surface 331, the ramp surface 331 can provide a certain degree of gravity support for the stator lamination. It should be understood that the stator lamination has a large weight due to the large number of turns of the wound steel strip. Therefore, when the stator lamination is wound on the winding wheel 32 in a vertical direction, it will produce a certain degree of deformation due to its own gravity, and may also cause the rotating shaft of the winding wheel 32 to produce a certain degree of deformation. This deformation will lead to a reduction in the winding accuracy of the subsequent winding layer, and then cause the punching grooves of each layer to not be kept on the same normal line, which directly leads to uneven tooth surfaces of the manufactured stator teeth. As mentioned above, the punching grooves and punching holes at the same position of different layers of the steel strip must be located on the same normal line to ensure the accurate formation of the tooth grooves and stacked holes. However, the deformation is not conducive to the accurate correspondence between the punching grooves and the punching holes. In view of this, the support provided by the ramp surface 331 for the stator lamination can compensate for the deformation of the stator lamination caused by its own gravity and provide a certain degree of gravity support for the rotating shaft of the winding wheel 32, thereby ensuring the accuracy of the stator lamination formed by winding. Furthermore, in this example, while providing support for the stator lamination, the ramp surface 331 can generate a certain pressure on the stator lamination. Specifically, during the winding process of the steel strip, each layer of the winding can be provided with pressure by the ramp surface 331, so that the layers of the stator lamination can be tightly wound together, thereby ensuring the compactness of the stator lamination produced.

[0126] In one embodiment, if Figure 1 As shown, the inclination angle β of the slope surface 331 is the same as the first preset angle α. That is, the inclination angle β of the slope surface 331 is between 10° and 30°, for example, it can be approximately 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, or 30°, etc. Further, the inclination angle β of the slope surface 331 is between 15° and 25°, for example, it can be approximately 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, or 25°, etc. Preferably, the inclination angle β of the slope surface 331 is 18°. In this embodiment, the extension line m of the slope surface 331 1 , the extension line m of the steel strip wound into the winding wheel 32 at a first preset angle α 2 , and the extension line of the horizontal plane m 3 The intersection area (shown as Figure 1 The enclosed area shown by the dotted line) forms an isosceles triangle.

[0127] In one embodiment, if Fig.12 and Fig.13As shown, the ramp frame 33 includes a frame body 332 and an inclined rail 333, the frame body 332 is arranged on the machine base 1, the inclined rail 333 is installed on the frame body 332, and its height is adjustable, and the inclined surface 331 is the track surface of the inclined rail 333. In this embodiment, the frame body 332 and the inclined rail 333 are perpendicular to each other in space, the inclined rail 333 provides the inclined surface 331 to be tangent to the stator lamination, the frame body 332 provides support for the inclined rail 333, the material of the frame body 332 and the inclined rail 333 includes but is not limited to cast iron, alloy, carbon structural steel, and the connection method between the frame body 332 and the machine base 1, and the frame body 332 and the inclined rail 333 includes but is not limited to bolt connection and welding. It should be understood that the height of the inclined rail 333 is adjustable, so that the winding device 3 can adapt to stator laminations of different sizes and thicknesses, so that stator laminations of different specifications can be produced without replacing the stator rolling equipment, which increases the versatility of the equipment and ensures production efficiency.

[0128] In one embodiment, in order to ensure that during the manufacturing process of the stator, as the tension control device 34 is able to pull and connect the winding seat 31 to move in the X direction, the bottom wheel surface of the stator laminate and the ramp surface 331 always remain tangent to each other during the entire production process, the length of the ramp surface 331 of the ramp frame 33 is greater than or equal to the maximum length of the tension control device 34 that is able to pull and connect the winding seat 31 to move in the X direction; preferably, the length of the ramp surface 331 of the ramp frame 33 is equal to the maximum length of the tension control device 34 that is able to pull and connect the winding seat 31 to move in the X direction.

[0129] In order to ensure that the bottom wheel surface of the stator stack always remains tangent to the ramp surface 331, in one embodiment, see Fig. 22 Combined with Fig.11 ,in, Fig. 22 The diagram is a schematic diagram of the structure of a tension control device in one embodiment of the present application. Fig.11 and Fig. 22As shown, the tension control device 34 is arranged on the base 1 of the stator punching and rolling equipment and is connected to the winding seat 31 by traction, so as to control the winding tension of the winding wheel 32. It should be understood that in the process of winding the steel strip to form the stator lamination, as the number of winding layers increases, the diameter of the stator lamination increases accordingly. In order to keep the stator lamination tangent to the slope surface 331 and avoid the stator lamination being crushed on the slope surface 331, the stator lamination needs to move relative to the slope surface 331 during the winding process. In addition, in order to ensure that the punching slots and punching holes at the same position of different layers of the steel strip are located on the same normal line, and then ensure the accurate formation of the tooth slots and stacking holes, it is necessary to ensure that the steel strip is subjected to appropriate tension during the entire winding process, so as to avoid the stator lamination formed by winding being too loose or too tight. In view of this, the winding device of the stator punching equipment described in the present application is provided with a tension control device 34 that can pull the winding seat 31 to control the winding tension of the winding wheel 32, so that the bottom wheel surface of the stator laminate is always kept tangent to the slope surface 331, and the tooth grooves and stacking holes are accurately formed, thereby ensuring the quality of the produced stator laminate.

[0130] In one embodiment, if Fig. 22 As shown, the tension control device 34 includes a driving mechanism 341 and a traction mechanism 342, and the traction mechanism 342 is connected to the driving mechanism 341, and is used to pull the winding seat 31 to move horizontally on the machine base 1. At this time, the winding seat 31 drives the winding wheel 32 and the stator stack wound on the winding wheel 32 to move horizontally, and the ramp surface 331 is fixed on the machine base 1 with the frame 332. Therefore, when the traction mechanism 342 pulls the winding seat 31 to move horizontally, the stator stack and the ramp surface 331 move relative to each other, but as the diameter of the stator stack increases, it is always tangent to the ramp surface 331. Here, the driving mechanism 341 is used to drive the traction mechanism 342 to operate. In one implementation, the driving mechanism 341 is a servo motor, which has a power output shaft and the power output shaft is connected to the traction mechanism 342. Of course, the driving mechanism can also be another driving source such as a hydraulic motor, as long as it can drive the traction mechanism 341 to operate, and this application does not limit it.

[0131] In order to realize the horizontal movement of the winding seat 31 on the machine base 1, in one embodiment, as shown in FIG. Fig. 22As shown, a transverse guide rail 14 is laid on the base 1 of the stator punching and rolling equipment, and the winding seat 31 is movably arranged on the transverse guide rail 14. In this embodiment, the transverse guide rail 14 is configured as two guide rails parallel in the transverse direction on the base 1, and the length of the two transverse guide rails 14 can run through the entire winding station. A slider that cooperates with the transverse guide rail 14 is provided on the winding seat 31 of the corresponding winding device 3, and the slider is located at the bottom of the winding seat 31 and is mounted on the transverse guide rail 14. Specifically, the driving mechanism 341 drives the traction mechanism 342 to operate, thereby traction The slider on the winding seat 31 moves on the transverse guide rail 14, thereby realizing the horizontal movement of the winding seat 31 on the base 1.

[0132] In one embodiment, if Fig. 22 As shown, the traction mechanism 342 includes a first tensioning wheel 3421, a second tensioning wheel 3422, and a traction block 3423. The first tensioning wheel 3421 is arranged on the first side of the machine base 1 and is connected to the driving mechanism 341. The second tensioning wheel 3422 is arranged on the second side of the machine base 1 and is connected to the first tensioning wheel 3421 through a chain 3424. The traction block 3423 is arranged on the winding seat 31, one side of which is connected to the first tensioning wheel 3421 through the chain 3424, and the other side is connected to the second tensioning wheel through the chain 3424, and is used for driving the winding seat 32 to move laterally through the traction of the chain 3424 when the driving mechanism 341 drives the first tensioning wheel 3421 to rotate. Fig. 22 In the example shown, the first tensioning wheel 3421 and the second tensioning wheel 3422 are configured as sprockets, and the sprockets have cog-type sprocket teeth that can mesh with the chain 3424. It should be noted that: Fig. 22 The driving mechanism 341 shown connected to the first tensioning wheel 3421 is only a schematic illustration. In actual applications, the driving mechanism 341 can also be connected to the second tensioning wheel 3422. Those skilled in the art can adjust its specific configuration according to the teachings of this application, as long as it can drive the first tensioning wheel 3421 and / or the second tensioning wheel 3422 to rotate, thereby driving the winding seat 32 to move laterally through the traction of the chain 3424.

[0133] In one embodiment, during the stamping operation of the stator stamping equipment, the traction mechanism 342 pulls the winding seat 31 to move laterally from the first side toward the second side. As mentioned above, in the process of winding the steel strip to form the stator lamination, as the number of winding layers increases, the diameter of the stator lamination increases accordingly. In order to enable the stator lamination to remain tangent to the ramp surface 331, and at the same time, to ensure that the punching grooves and holes at the same position of different layers of the steel strip are located on the same normal line, that is, to ensure that the angular dimensions of the same group of tooth grooves and stacked holes of the manufactured stator lamination always expand on the same normal line without misalignment, the winding seat 31 needs to drive the stator lamination to move toward the second side as the winding proceeds. Specifically, the driving mechanism 341 drives the first tensioning wheel 3421 to rotate clockwise, so as to drive the chain 3424 to rotate clockwise around the first tensioning wheel 3421 and the second tensioning wheel 3422, thereby driving the winding seat 31 to move laterally from the first side toward the second side along the transverse guide rail 14, that is, along the transverse guide rail 14. Fig. 22 Move in the direction of the dotted arrow.

[0134] In one embodiment, during the coiling operation of the stator coiling device, the traction mechanism 342 controls the lateral traction distance of the winding seat 31 from the first side to the second side according to the obtained layer data of the steel strip wound on the winding wheel 32. The lateral traction distance of the winding seat 31 can be determined by the number of rotations and the rotation angle of the first tensioning wheel 3421. In other words, the layer data controls the number of rotations and the rotation angle of the first tensioning wheel 3421, and then controls the lateral traction distance of the winding seat 31 from the first side to the second side. As mentioned above, the layer data controls the length of each intermittent winding of the steel strip, specifically, by controlling the lateral traction distance of the winding seat 31. The acquisition and control process of the layer data can be referred to the description in the above embodiment, which will not be repeated here.

[0135] In one embodiment, before the stator rolling device starts the rolling operation, the traction mechanism 342 pulls the winding seat 31 to move laterally from the second side toward the first side to reset the positional relationship between the winding wheel 32 and the ramp surface 331. Specifically, the driving mechanism 341 drives the first tensioning wheel 3421 to rotate counterclockwise, so as to drive the chain 3424 to rotate counterclockwise around the first tensioning wheel 3421 and the second tensioning wheel 3422, thereby driving the winding seat 31 to move laterally from the second side toward the first side along the transverse guide rail 14, that is, along the transverse guide rail 14. Fig. 22 Move in the opposite direction of the arrow indicated by the dotted line.

[0136] In another embodiment, during the rolling operation of the stator rolling device, the winding wheel 32 moves from the top to the bottom along the ramp surface 331 and keeps the bottom wheel surface of the stator lamination tangent to the ramp surface 331. In one implementation, a counterweight portion may be configured on the winding wheel 32, and the counterweight portion may be released during the winding process. The counterweight portion descends and drives the associated winding wheel 32 to move from the top to the bottom to keep the state of being tangent to the ramp surface 331. The counterweight portion may include counterweight blocks, wherein the number of the counterweight blocks may be adjusted according to actual applications. For example, during the winding process, as the diameter of the stator lamination increases, the number of counterweight blocks may be increased so that the winding wheel 32 moves from the top to the bottom along the ramp surface 331 to keep the winding wheel 32 tangent to the ramp surface 331. Correspondingly, before the stator rolling device starts the rolling operation, the number of counterweights can be reduced so that the winding wheel 32 moves from the lower side to the upper side along the ramp surface 331 to reset the positional relationship between the winding wheel 32 and the ramp surface 331. Further, the counterweight portion may include a locking component, which is used to lock the counterweight portion so that the counterweight portion is stationary relative to the winding wheel 32, so that the winding wheel 32 and the ramp surface 331 are switched from an active state to a locked state. In some examples, the locking component may be, for example, a latch.

[0137] The following combination Figures 11 to 22 The winding process of the winding device 3 is described in detail:

[0138] First, the stator ring 37 is staggered by the first tooth-shaped structure 322211 and the second tooth-shaped structure 322221 of the locking mechanism 322, so that the locking mechanism 322 is as follows: Fig.17 The state shown in the figure is achieved, and the stator ring 37 is fixed on the winding wheel 32. Then, the winding wheel 32 drives the stator ring 37 to rotate under the drive of the winding mechanism 311, so that the steel strip 521 after stamping is intermittently wound by the winding wheel 32. At this time, the stator stack formed by winding is supported by the slope surface 331 of the ramp frame 33, and the bottom wheel surface of the stator stack is always tangent to the slope surface 331. As the number of winding layers increases, the diameter of the stator stack increases accordingly. During this process, the driving mechanism 341 of the tension control device 34 drives the traction mechanism 342, so that the traction mechanism 342 pulls the winding seat 31 to move horizontally on the machine base 1, ensuring that the tension of the steel strip is appropriate during the entire winding process to avoid the stator stack formed by winding being too loose or too tight, and at the same time, the stator stack in the winding process is always tangent to the slope surface 331, until the size of the produced stator stack meets the production requirements. Finally, the stator lamination and the steel strip 521 are cut off, so that the first tooth-shaped structure 322211 and the second tooth-shaped structure 322221 of the locking mechanism 322 are engaged with each other, and the locking mechanism 322 is presented as follows. Fig.18In the state shown, the operator can unload the stator ring 37 and the stator lamination from the winding wheel 32 at the same time.

[0139] In one embodiment, if Figure 1 As shown, the control device 4 is connected to the punching device 2 and the winding device 3, and is used to control the punching device 2 to perform a punching operation under a first instruction and to control the winding device 3 to perform a winding operation under a second instruction. For example, the first instruction can control the switching of the mold mechanism in the punching device 2 to selectively punch grooves or holes on the steel strip. The second instruction can control the rotation of the winding motor 3111 in the winding mechanism 311 in the winding device 3 to control the rotation of the winding wheel 32, or the rotation of the driving mechanism 34 in the tension control device 34 to adjust the winding tension. The second instruction may include, for example, the control instructions and / or detection signals described in the aforementioned embodiments. Of course, the control device can also control other operations, which can be specifically set according to actual production needs, and the present application does not impose any restrictions on this.

[0140] In one embodiment, the control device 4 controls the length of each intermittent winding of the steel strip 521 according to the layer data of the steel strip wound on the winding device 3 so that the punching slots and holes on different layers are on the same normal line, that is, the angle dimensions of the same group of tooth slots and stacked holes of the stator stack are always expanded on the same normal line without misalignment. In one example, the control device 4 can control the length of each intermittent winding of the steel strip 521 by controlling the number of rotations and the rotation angle of the winding wheel 32.

[0141] In one embodiment, the control device 4 adjusts the distance between the winding device 3 and the punching device 2 according to the obtained data of the steel strip layer wound on the winding wheel 32. As mentioned above, the control device 4 can adjust the distance between the winding device 3 and the punching device 2 by controlling the traction mechanism 342 to move the winding seat 31 from the first side toward the second side by a lateral traction distance. For details, please refer to the above description, which will not be repeated here.

[0142] In one embodiment, the control device 4 controls the rotation of the winding wheel 32 on the winding device 3 to drag the steel strip 521 to intermittently pass through the feed table 12 and the stamping table 21. In one example, the control device 4 can control the distance that the steel strip 521 moves relative to the feed table 12 and the stamping table 21 by controlling the number of rotations and the rotation angle of the winding wheel 32. For example, the control device 4 controls the steel strip 521 to move forward a first distance, so that the steel strip 521 is punched to form a punching groove 351, and then the control device 4 controls the steel strip 521 to move forward a second distance, so that the steel strip 521 is punched again to form a punching groove 351, and then the control device 4 controls the steel strip 521 to move forward a third distance, so that the steel strip 521 is punched to form a punching hole 352. As mentioned above, in order to ensure that the multi-layered grooves 351 and holes 352 can correspond accurately, the spacing between the grooves 351 punched on different layers is different, and the spacing between the holes 352 is also different. Therefore, the first distance, the second distance, and the third distance need to be determined based on actual production requirements.

[0143] In one embodiment, the control device 4 includes a processing unit, a storage unit and an interface unit. The interface unit can be connected to the stamping device 2 and the winding device 3, and can also be connected to other independently packaged devices or components or structures or mechanisms in the stator stamping and rolling equipment that transmit data through the interface. The control device 4 may also include at least one of the following: a prompt device, a human-computer interaction device, etc. The interface unit determines its interface type according to the connected device or component or structure or mechanism, which includes but is not limited to: a universal serial interface, a video interface, an industrial control interface, a wireless communication port, etc. The storage unit is used to store the first instruction and the second instruction, and the processing unit is connected to the storage unit for executing the first instruction and the second instruction. Wherein, when executing the first instruction, the stamping device 2 is controlled to perform a stamping operation at the stamping station; when executing the second instruction, the winding device 3 is controlled to perform a winding operation at the winding station.

[0144] Generally, most manufacturers only set a driving mechanism on the punching device 2 and the winding device 3, so that the unwinding process of the steel strip unwinding device is passively carried out due to the traction of the punching device 2 or the winding device 3 at the rear end. However, due to the large mass of the steel strip roll (or steel coil) on the unwinding device, even if a small traction force is given to it, it will be affected by the traction inertia and cause the steel strip roll to rotate excessively and even unwind excessively. Therefore, this passive unwinding method will make the tension of the steel strip on the stator manufacturing production line unstable. For example, when the tension on the steel strip is too tight, the size of the steel strip entering the punching station will be insufficient, resulting in the punching spacing of the punching not meeting the requirements; and when the tension on the steel strip is too loose, the unwinding amount of the steel strip unwinding device will be excessive, resulting in a large stroke of the steel strip entering the punching station, which will also cause the punching spacing of the punching not meeting the requirements. Therefore, the unstable tension of the steel strip will make it difficult for the punching grooves on the steel strip to form tooth grooves in the subsequent process, and it will be difficult for the punching holes on the steel strip to form overlapping holes in the corresponding manner, so that the accuracy of the manufactured stator cannot be guaranteed, and even lead to scrapping. In view of this, the stator stamping equipment described in the present application further includes an unwinding device 5 for realizing active unwinding of the wound steel strip to be stamped.

[0145] In one embodiment, the unwinding device 5 is disposed on the first side of the machine base 1, and is used to convey the wound steel strip to be stamped to the feeding table 21. Figure 23 to Figure 25 , Fig.23 It is a schematic diagram of the structure of a stator rolling device in another embodiment of the present application. Fig.24 It is a schematic diagram showing the structure of an unwinding device of a stator coiling device in one embodiment of the present application. Fig.25 The diagram is a partially enlarged schematic diagram of an unwinding device in one embodiment of the present application. Figure 23 to Figure 25 As shown, the unwinding device 5 is provided with an active unwinding unit to release the wound steel strip.

[0146] In one example, if Fig.25As shown, the unwinding unit 51 includes an axial flux motor 511 and a reducer 512, the output shaft 5111 of the axial flux motor 511 is arranged vertically, so that the axial flux motor 511 is arranged horizontally between the upper mounting plate 53 and the lower mounting plate 54, and the reducer 512 is connected to the axial flux motor 511 through a transverse belt 513. In this embodiment, the axial flux motor 511 is used to provide the main power for the operation of the unwinding unit 51. It should be understood that when unwinding the steel strip 521 wound on the steel strip roll 52, the unwinding device 5 needs to provide a stable and large torque, but the torque directly output by the axial flux motor 511 is relatively small and the speed is high, which is not suitable for driving the unwinding device 5 alone. In view of this, the reducer 512 can be used to convert the high speed and low torque output by the axial flux motor 511 into a low speed and high torque suitable for steel strip unwinding, so that it can not only meet the torque demand of steel strip unwinding, but also maintain efficient power transmission during the unwinding process. The types of the reducer 512 include but are not limited to planetary reducers, worm gear reducers, helical gear reducers, and the like.

[0147] In the present application, the start and stop of the axial flux motor 511 is performed by sending a control instruction through the control device 4, and the start and stop of the axial flux motor is controlled according to the control instruction.

[0148] The axial flux motor 511 is a preferred implementation mode of this embodiment because of its advantages such as high power, high efficiency and compact structure, and should not be understood as a limitation to the present application. For example, without changing the overall layout of the unwinding device 5 and the base space design provided by the present application, technical personnel in this field can also replace the axial flux motor with a radial flux motor, a brushless DC motor, an AC induction motor, a stepper motor or a servo motor based on the technical ideas of the present application.

[0149] In one embodiment, if Figure 3 As shown, the transverse belt 513 connects the output shaft 5111 of the axial flux motor 511 and the input shaft 5121 of the reducer 512. The power generated by the axial flux motor 511 is output through the output shaft 5111. The transverse belt 513 transmits the power output by the axial flux motor 511 to the reducer 512 through the input shaft 5121 of the reducer 512. Finally, the output shaft 5122 of the reducer 512 outputs a suitable speed and torque for unwinding the steel strip coil 52. In certain other embodiments, the output shaft 5111 of the axial flux motor 511 and the input shaft 5121 of the reducer 512 may be connected by a chain or a gear. The specific power transmission method is determined according to actual production requirements, and this application does not impose any restrictions on this.

[0150] In one embodiment, the input shaft 5121 of the speed reducer 512 is parallel to the output shaft 5111 of the axial flux motor 511. In this way, friction and loss generated when connecting the input shaft 5121 of the speed reducer 512 and the output shaft 5111 of the axial flux motor 511 can be avoided, thereby improving the driving efficiency of the unwinding unit 51.

[0151] Since the present application adopts an active steel strip coil driving method including an axial flux motor 511 and a reducer 512, the steel strip coil on the unwinding device will not be affected by the traction inertia of the rear-end stamping device 2 and the winding device 3, which will cause the steel strip coil to rotate excessively and even unwind excessively, thereby effectively avoiding problems such as excessive unwinding or insufficient unwinding size caused by unstable tension of the steel strip on the stator manufacturing production line.

[0152] In one embodiment, the control device 4 performs synchronous control when performing the winding operation under the second instruction so that the winding amount of the winding wheel 32 is the same as the unwinding amount of the unwinding unit 51. It should be understood that the unwinding device 5 is connected with the stamping device 2 and the winding device 3 through the steel strip to form a stator manufacturing production line. On the stator manufacturing production line, the unwinding device 5 and the winding device 3 need to operate synchronously to ensure the continuity of stator production. Further, in order to ensure the constant tension on the steel strip, and then ensure the quality and accuracy of the formed stator, the unwinding amount of the unwinding unit 51 of the unwinding device 5 needs to be the same as the winding amount of the winding wheel 32.

[0153] The following combination Figures 1 to 25 The working process of the stator punching and rolling equipment of the present application is described in detail.

[0154] First, the unwinding device 5 unwinds the steel strip roll 52 through the active unwinding unit 51 to form a steel strip 521. The steel strip 521 is flattened by the flattening device 13 and enters the stamping station. The stamping device 2 stamps the steel strip 521 under the first instruction of the control device 4. Specifically, the switching drive mechanism 242 drives the switching pressing plate 241 to Fig. 9 The position shown in the figure makes the punch 2212 impact the first die assembly 231 under the drive of the driving unit 222. At this time, the second avoidance space 2412 prevents the switching plate 241 from contacting the punching movable die 2322. At the same time, the plate body 2410 touches the slotting movable die 2312, so that the slotting movable die 2312 moves downward relative to the punching movable die 2322 and impacts the slotting fixed die 2311. Then, the steel strip 521 located in the second punching space 225 is impacted by the slotting movable die 2312 and the slotting fixed die 2311 and forms the first slot 351 through the groove structure 23111. After the first slot 351 is punched, the slotting movable die 2312 moves upward under the action of the die reset element to return to the initial position.

[0155] Thereafter, the steel belt 521 advances a certain distance (eg Fig.14 The movable die 2312 repeats the above-mentioned action to punch a second punching groove 351 on the steel strip 521 through the groove structure 23111. After the punching of the second punching groove 351 is completed, the movable die 2312 moves upward under the action of the die reset element to return to the initial position again. In this way, the steel strip 521 is impacted by the first die assembly 231 twice in succession to form two adjacent punching grooves 351.

[0156] Then, the steel belt moves forward again by a predetermined distance (for example Fig.14 The distance between the punching slot 351 and the adjacent punching hole 352), the switching driving mechanism 242 drives the switching pressing plate 241 to Fig.10 In the position shown, the punch 2212 impacts the second die assembly 232 under the drive of the driving unit 222. At this time, the arm structure 2413 contacts the punching movable die 2322. At the same time, the first avoidance space 2411 prevents the switching plate 241 from contacting the slotting movable die 2312, so that the punching movable die 2322 moves downward relative to the slotting movable die 2312 and impacts the punching fixed die 2321. Finally, the steel strip 521 located in the second punching space 225 is impacted by the punching movable die 2322 and the punching fixed die 2321 and forms a punching hole 352 through the hole structure 23211. After the punching hole 352 is punched, the punching movable die 2322 moves upward under the action of the die reset element to return to the initial position.

[0157] In this way, the steel strip 521 continues to move forward driven by the winding device 3, and two adjacent punching grooves are formed under the impact of the first mold assembly 231 twice in a row, and a punching hole is formed under the impact of the first mold assembly 231. The first mold assembly 231 and the second mold assembly 232 work in a cycle until the entire steel strip is processed.

[0158] When the stamped steel strip is wound, the winding device 3 winds the steel strip 521 located at the winding station under the second instruction of the control device 4. Specifically, the stator ring 37 is staggered by the first tooth-shaped structure 322211 and the second tooth-shaped structure 322221 of the locking mechanism 322, so that the locking mechanism 322 is as follows: Fig.17The state shown in the figure is achieved, and the stator ring 37 is fixed on the winding wheel 32. Then, the winding wheel 32 drives the stator ring 37 to rotate under the drive of the winding mechanism 311, so that the steel strip 521 after stamping is intermittently wound by the winding wheel 32. At this time, the stator stack formed by winding is supported by the slope surface 331 of the ramp frame 33, and the bottom wheel surface of the stator stack is always tangent to the slope surface 331. As the number of winding layers increases, the diameter of the stator stack increases accordingly. During this process, the driving mechanism 341 of the tension control device 34 drives the traction mechanism 342, so that the traction mechanism 342 pulls the winding seat 31 to move horizontally on the machine base 1, ensuring that the tension of the steel strip is appropriate during the entire winding process to avoid the stator stack formed by winding being too loose or too tight, and at the same time, the stator stack in the winding process is always tangent to the slope surface 331, until the size of the produced stator stack meets the production requirements. Finally, the stator lamination and the steel strip 521 are cut off, so that the first tooth-shaped structure 322211 and the second tooth-shaped structure 322221 of the locking mechanism 322 are engaged with each other, and the locking mechanism 322 is presented as follows. Fig.18 In the state shown, the operator can unload the stator ring 37 and the stator lamination from the winding wheel 32 at the same time.

[0159] In summary, in order to overcome the technical problems existing in the related art that during the manufacturing process of the stator core, the deformation of the wound stator laminate makes it impossible for the slots of each layer to accurately correspond, resulting in low precision of the produced stator core, the winding device and stator rolling equipment provided by the present application first set a slope surface with a preset inclination angle so that the winding wheel always remains tangent to the wheel surface at the bottom of the stator laminate during the winding operation, so that the slope surface can provide support for the stator laminate in the entire winding process, thereby compensating for the deformation of the stator laminate itself or the winding wheel shaft caused by the increase of its own gravity, so that the slots and holes can accurately correspond to form tooth slots and stacked holes, ensuring the winding. The quality and precision of the formed stator lamination; in addition, on the basis of the above, the present application further controls the winding tension of the winding wheel by arranging a tension control device connected to the winding seat, thereby ensuring that the steel strip can maintain appropriate tension and the moving stroke of the winding device during the entire winding process, and the tension control device keeps the bottom wheel surface of the stator lamination tangent to the slope surface at all times, so that the angular dimensions of the same group of tooth slots and stacked holes of the manufactured stator lamination always expand on the same normal line without misalignment, thereby further ensuring the quality and precision of the produced stator; furthermore, the present application also realizes rapid fixation or rapid unloading of the stator lamination by arranging an automatic locking mechanism on the winding wheel, thereby improving production efficiency.

[0160] In addition, the stator punching and rolling equipment of the present application is provided with an unwinding device having an active unwinding unit, and utilizes an active steel strip roll driving method including an axial flux motor and a reducer, so that the steel strip roll on the unwinding device will not be affected by the traction inertia of the rear-end stamping device and the winding device, causing the steel strip roll to rotate excessively and even unwind excessively, thereby effectively avoiding problems such as excessive unwinding or insufficient unwinding size caused by unstable tension of the steel strip on the stator manufacturing production line, thereby further ensuring the quality and accuracy of the manufactured stator.

[0161] Furthermore, the stator rolling equipment provided by the present application, by setting a die mechanism capable of punching slots and holes on a steel strip, enables the die assembly for punching slots and the die assembly for punching holes to be integrated on the same die mechanism, thereby improving space utilization and reducing equipment errors, ensuring the accuracy of the punching slots and holes formed by punching, so that the punching slots and holes can accurately correspond to form tooth slots and overlapping holes, thereby ensuring the accuracy and quality of the stator lamination produced. By simultaneously setting a punching device for punching the steel strip and a winding device for winding the punched steel strip, the integration of the punching device and the winding device is realized, so that the punching operation and the winding operation can be carried out simultaneously, thereby improving production efficiency. By setting a control device, the punching device can be controlled to perform a punching operation under a first instruction, and the winding device can be controlled to perform a winding operation under a second instruction, thereby realizing simultaneous control of the punching operation and the winding device, thereby further improving production efficiency. Furthermore, by providing a stamping switching mechanism with a switching pressure plate, and providing a first avoidance space and a second avoidance space on the switching pressure plate, the stamping mechanism can switch the mold assembly for notching or the mold assembly for punching only by moving the switching pressure plate, and the notching and punching of the steel strip can be respectively achieved by spatially displacing the mold assembly for notching and the mold assembly for punching, thereby further ensuring the accuracy of the notches and punching formed by stamping.

[0162] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A winding device for a stator rolling device, characterized in that: include: A winding seat, which is horizontally movably arranged on the base of the stator rolling device; The winding wheel is arranged on the winding seat at a preset height and is used for intermittently winding the stamped steel strip to form a stator lamination; it comprises: a wheel body and at least two locking mechanisms arranged on the wheel body and used for fixing and unloading the stator lamination; each layer of steel strip in the stator lamination is formed with a plurality of tooth grooves and a plurality of stacking holes formed between every two adjacent tooth grooves; A ramp frame is arranged on the base of the stator rolling device in a state of being tangent to the wheel surface of the winding wheel, and comprises a ramp surface with a preset inclination angle so as to always remain tangent to the bottom wheel surface of the stator lamination during the winding operation of the winding wheel; A tension control device is arranged on the machine base of the stator rolling device and is traction-connected to the winding seat, and is used to control the winding tension of the winding wheel and to keep the bottom wheel surface of the stator laminate tangent to the slope surface at all times. The tension control device includes a driving mechanism and a traction mechanism connected to the driving mechanism for traction of the winding seat to move horizontally on the machine base. During the rolling operation, the traction mechanism controls the lateral traction distance of the winding seat from the first side to the second side according to the obtained data of the steel strip layer wound on the winding wheel; the traction mechanism includes: A first tensioning wheel is disposed on a first side of the machine base and connected to the driving mechanism; the first tensioning wheel controls the number of rotations and the rotation angle according to the layer data to control the lateral traction distance; A second tensioning wheel, disposed on the machine base and located at a second side away from the first side, and connected to the first tensioning wheel through a chain; A traction block is arranged on the winding seat, one side of which is connected to the first tensioning wheel through the chain, and the other side is connected to the second tensioning wheel through the chain, and is used to drive the winding seat to move laterally through the traction of the chain when the driving mechanism drives the first tensioning wheel to rotate.

2. The winding device of the stator rolling equipment according to claim 1, characterized in that: The steel strip that has completed the stamping operation is tilted and rolled onto the winding wheel at a first preset angle.

3. The winding device of the stator rolling equipment according to claim 2, characterized in that: The first preset angle is between 10° and 30°.

4. The winding device of the stator rolling equipment according to claim 2, characterized in that: The inclination angle of the slope surface is the same as the first preset angle, and the intersection area of ​​the extension line of the slope surface, the extension line of the steel strip inclined at the first preset angle and the extension line of the horizontal plane forms an isosceles triangle.

5. The winding device of the stator rolling equipment according to claim 1, characterized in that: A transverse guide rail is laid on the machine base of the stator rolling device, and the winding seat is movably arranged on the transverse guide rail.

6. The winding device of the stator rolling equipment according to claim 1, characterized in that: During the stator rolling operation of the stator rolling device, the winding wheel moves along the slope surface from the top to the bottom and keeps the bottom wheel surface of the stator lamination tangent to the slope surface at all times.

7. The winding device of the stator rolling equipment according to claim 1, characterized in that: Before the stator rolling device starts the rolling operation, the traction mechanism pulls the winding seat to move laterally from the second side toward the first side to reset the positional relationship between the winding wheel and the ramp surface.

8. The winding device of the stator rolling equipment according to claim 1, characterized in that: The winding seat is provided with a winding mechanism for driving the winding wheel. The winding mechanism comprises a winding motor and a reducer connected via a synchronous belt. The winding wheel is arranged on the output shaft of the reducer.

9. The winding device of the stator rolling equipment according to claim 8, characterized in that: The winding seat includes a first installation space located at the bottom for setting a tension control device, and a second installation space and a third installation space located on the upper side of the first installation space; wherein the winding motor and the reducer are arranged in the second installation space; the winding wheel is arranged on the outer wall of the third installation space by passing through the output shaft of the reducer of the third installation space.

10. The winding device of the stator rolling equipment according to claim 8, characterized in that: The winding mechanism controls the length of each intermittent winding of the steel strip according to the layer data of the steel strip wound on the winding wheel.

11. The winding device of the stator rolling equipment according to claim 1, characterized in that: It also includes a stator ring for winding a steel strip to form the stator lamination, and the inner ring surface of the stator ring is provided with a clamping groove.

12. The winding device of the stator rolling equipment according to claim 11, characterized in that: The locking mechanism comprises: A groove is formed on the wheel surface of the wheel body; The locking assembly comprises a clamping seat arranged in the groove and a clamping block arranged in the clamping seat and capable of extending out of the wheel surface of the wheel body to engage with the clamping groove or retracting into the wheel surface of the wheel body to disengage from the clamping groove.

13. The winding device of the stator rolling equipment according to claim 12, characterized in that: The clamping seat is provided with a first tooth-like structure corresponding to the part combined with the clamping block, and the clamping block is provided with a second tooth-like structure corresponding to the first tooth-like structure; wherein, when the first tooth-like structure and the second tooth-like structure are in a state of being engaged with each other, the clamping block is in a state of being retracted into the wheel surface of the wheel body; and when the first tooth-like structure and the second tooth-like structure are staggered with each other, the clamping block is in a state of being protruded out of the wheel surface of the wheel body.

14. The winding device of the stator rolling equipment according to claim 12, characterized in that: The locking mechanism includes a driving cylinder arranged on the winding seat and a driving rod connected to the driving cylinder and parallel to the axial direction of the wheel body. The end of the driving rod is connected to the second tooth-shaped structure of the block to drive the second tooth-shaped structure to move in a direction parallel to the axial direction of the wheel body.

15. The winding device of the stator rolling equipment according to claim 1, characterized in that: The ramp frame comprises a frame body arranged on the machine base and a height-adjustable ramp rail installed on the frame body, and the ramp surface is a track surface of the ramp rail.

16. A stator rolling device for an axial flux motor, characterized in that: include: A machine base, comprising a frame erected on a first side of the machine base, and a feed table mounted on the frame and inclined at a first preset angle relative to a horizontal plane; A stamping device, comprising a stamping table arranged on the machine base and connected to the feed table at a first preset angle, a stamping mechanism mounted on the frame at a second preset angle and located on the upper side of the stamping table, a die mechanism arranged on the stamping table for stamping the intermittently fed steel strip to form a slot and a hole, and a stamping switching mechanism; wherein the die mechanism comprises a first die assembly for stamping the steel strip passing through the stamping table twice to form two adjacent slots, and a second die assembly independently arranged relative to the first die assembly for stamping the steel strip passing through the stamping table once to form a hole; the stamping switching mechanism comprises: a switching plate arranged between the stamping mechanism and the die mechanism, and used to select stamping the first die assembly or the second die assembly according to a preset process; a switching drive mechanism, comprising an advance and retreat mechanism arranged on the feed table to drive the switching plate to move, and a drive motor for driving the advance and retreat mechanism; the switching plate is used to press the first die assembly in the forward state and to press the second die assembly in the backward state; The winding device according to any one of claims 1 to 15; wherein each layer of the stator lamination steel strip is formed with a plurality of tooth slots and a plurality of stacking holes formed between every two adjacent tooth slots; A control device is connected to the stamping device and the winding device, and is used to control the stamping device to perform a stamping operation under a first instruction and to control the winding device to perform a winding operation under a second instruction. The first instruction can control the switching of the mold mechanism in the stamping device to selectively punch grooves or holes on the steel strip.

17. The stator rolling equipment according to claim 16, characterized in that: The feeding table is at a first preset angle of 10° to 30° relative to the horizontal plane.

18. The stator rolling equipment according to claim 17, characterized in that: The feeding table is at a first preset angle of 15° to 25° relative to the horizontal plane.

19. The stator rolling equipment according to claim 17, characterized in that: The first preset angle and the second preset angle are perpendicular to each other.

20. The stator rolling equipment according to claim 16, characterized in that: It also includes a flattening device arranged on the first side of the feeding table for flattening the steel strip intermittently conveyed to the stamping table to prepare for the stamping operation.

21. The stator rolling equipment according to claim 16, characterized in that: It also includes an unwinding device arranged on the first side of the machine base for conveying the wound steel strip to be punched to the feeding table, and the unwinding device is provided with an active unwinding unit to release the wound steel strip.

22. The stator rolling equipment according to claim 21, characterized in that: The control device performs synchronous control when performing the winding operation under the second instruction so that the winding amount of the winding wheel is the same as the unwinding amount of the unwinding unit.

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