Iron core manufacturing method and iron core

Abstract

The invention relates to the technical field of iron cores, and particularly discloses an iron core manufacturing method and an iron core, and the iron core manufacturing method comprises the steps that iron core single sheets are punched at a first riveting point punching station, and a riveting point groove internally comprises a plane bottom wall; secondary stamping is conducted on the plane bottom wall at a second riveting point stamping station to form a spherical protrusion and a vertical stamping hole located in the plane bottom wall, third-time stamping is conducted on the riveting point position at a third riveting point stamping station, and a homodromous movement guide groove is formed in the edge of a groove opening of the riveting point groove; sequentially stacking the plurality of iron core single sheets punched by the third riveting point punching station on a mandrel mechanism, and forming a first gap between the plurality of iron core single sheets; the core shaft mechanism is used for changing the operation position of error accumulation in the machining process in a staggered mode. According to the iron core manufacturing and assembling method, the operation continuity is good, efficient treatment is facilitated, and the quality is controllable.

Description

Technical Field

[0001] This invention relates to the field of iron core technology, specifically to a method for manufacturing an iron core and an iron core. Background Technology

[0002] The widespread application of iron core structures in motors, electrical appliances, and other equipment places high demands on their processing precision, assembly stability, and heat treatment adaptability. Traditional iron core manufacturing processes typically involve stamping individual core sheets, aligning and stacking them, and fixing them by riveting or bonding, followed by overall painting or tempering. However, due to the tight fit between the core sheets, the coating and heat cannot fully penetrate, limiting the treatment effect. Furthermore, during assembly, core sheets are prone to misalignment, pinching, or uneven local stress, especially in multi-sheet stacked structures, where angular errors and processing deviations accumulate axially, affecting overall magnetic circuit stability and operational performance. In addition, traditional structures generally rely on external force to eliminate gaps, lacking active misalignment, separation, and visual identification structures during the process, resulting in delayed process adjustments and increased maintenance costs. Therefore, there is an urgent need for an iron core manufacturing and assembly method that is structurally innovative, offers good operational continuity, facilitates efficient processing, and ensures quality control. Summary of the Invention

[0003] This application provides a method for manufacturing an iron core and an iron core, the main purpose of which is to achieve a method for manufacturing and assembling an iron core that has good operational continuity, is easy to process efficiently, and has controllable quality.

[0004] To achieve the above objectives, embodiments of this application provide a method for manufacturing an iron core in a first aspect, comprising:

[0005] A single iron core sheet is stamped at the first rivet stamping station, and multiple rivet grooves that can overlap in position after axial rotation of 180 degrees are formed on the single iron core sheet. The rivet groove includes a flat bottom wall.

[0006] The planar bottom wall is stamped a second time at the second rivet stamping station to form a spherical protrusion on the outside of the planar bottom wall and a vertical stamping hole located inside the planar bottom wall. The diameter of the opening of the vertical stamping hole is smaller than the maximum diameter of the spherical protrusion.

[0007] The rivet point is stamped three times at the third rivet point stamping station to form a unidirectional motion guide groove on the edge of the rivet point groove.

[0008] Multiple iron core pieces, after being stamped at the third rivet stamping station, are stacked sequentially on the mandrel mechanism. The spherical protrusions do not fully enter the vertical stamping holes, forming a first gap between the multiple iron core pieces.

[0009] The mandrel mechanism uses the first gap to stagger all the iron core pieces into odd and even number groups, and drives one of the odd or even pieces to rotate relative to the other. The final stopping position is 180 degrees from the initial position, so as to change the working position due to the accumulation of errors during the processing.

[0010] In one feasible implementation, during the process of using the mandrel mechanism to drive one of the odd-numbered or even-numbered pieces to rotate relative to the other, the spherical protrusion disengages from the rivet groove opening in the adjacent iron core piece and moves towards the surface of the iron core structure via the motion guide groove in the rivet groove; the spacing between the multiple iron core pieces increases from a first gap to a second gap.

[0011] In one feasible implementation, before stacking the core sheets, position marking slots are punched at equal intervals on the peripheral sidewalls of the core sheets, and the number of position marking slots is odd.

[0012] In one feasible implementation, one of the odd-numbered or even-numbered iron core pieces is a non-rotating iron core group and the other is a rotating iron core group, and the position marking groove in the non-rotating iron core group is limited by a stop mechanism.

[0013] In one feasible implementation, the mandrel mechanism includes: a switching seat capable of switching between a horizontal and a vertical state under the action of an external force; a misalignment drive assembly disposed on the switching seat for driving each core piece connected to the rotating core assembly; an arc-shaped inlet end fixedly disposed at the outer end of the switching seat; and a rotation drive assembly disposed in the cavity between the switching seat and the arc-shaped inlet end for driving the rotating core assembly to rotate.

[0014] In one feasible implementation, the stop mechanism includes: a limiting post fixedly disposed on the outer wall of the mandrel mechanism and corresponding to the position marking groove, the limiting post having a polygonal cross-section; a misalignment stop member movably sleeved on the outer wall of the limiting post along the length direction of the limiting post, the outer end of the misalignment stop member being located in the position marking groove of each of the core pieces in the non-rotating core assembly; two pads fixedly disposed at the upper and lower ends of the misalignment stop member; and a limiting hole opened on the outer side wall of the misalignment stop member, consistent with the opening direction of the motion guide groove.

[0015] In one feasible implementation, the end of the motion guide groove closest to the rivet groove is the first guide end, the other end of the motion guide groove is the second guide end, the middle part of the motion guide groove is arc-shaped, and the depth of the first guide end is greater than the depth of the second guide end.

[0016] In one feasible embodiment, the rotary drive assembly includes: a rotary cylinder rotatably sleeved on the outer wall of the switching seat; a slide block arranged in a ring shape, located on the end face of the rotary cylinder connected to the slide rail on the wall of the switching seat; a drive motor fixedly disposed in the inner cavity of the switching seat, and a drive gear disposed on the output shaft of the drive motor; and a meshing wall fixed on the inner wall of the rotary cylinder, and an internal gear disposed on the meshing wall, the internal gear meshing with the drive gear.

[0017] In one feasible implementation, the rotating cylinder has multiple through-type linear grooves equidistantly spaced on its wall surface. The grooves are opened along the axial direction of the iron core. The misalignment drive assembly includes: at least one power supply post disposed in the gap between the switching seat and the rotating cylinder, and capable of rotating with the rotating cylinder. The power supply post can be connected to an external power source through a slip ring; several sliders corresponding to the positions of each iron core piece in the rotating iron core assembly; an electromagnet is disposed in the inner wall of the end of each slider that contacts an adjacent slider. The electromagnet can be connected to the power supply post. The electromagnet is used to generate a repulsive force between two adjacent sliders to help increase the thrust between each iron core piece structure from the first gap to the second gap; and push blocks are fixedly disposed on the outside of each slider. The positions of each push block correspond to the positions of each iron core piece in the rotating iron core assembly. The push blocks can rotate into the first gap.

[0018] In a second aspect, this application also provides an iron core manufactured by the iron core manufacturing method described in the first aspect. The iron core includes a plurality of rivet grooves capable of coinciding by 180-degree rotation, and further includes: inclined sidewalls formed circumferentially in each rivet groove; a flat bottom wall formed on the bottom wall of each rivet groove; rounded corners located on the groove edges of the rivet grooves; and a motion guide groove including a first guide end located within the rivet groove and a second guide end extending outside the rivet groove, the middle portion of which is concentrically disposed with the iron core monolith. The first guide end has a greater depth than the second guide end; position marking slots are formed on the outer side wall of each core piece, and an odd number of position marking slots are formed on each core piece; a vertical punching hole is formed in the middle of the bottom wall of the plane, and a spherical protrusion is formed outside the vertical punching hole. The diameter of the opening of the vertical punching hole is smaller than the maximum diameter of the spherical protrusion. An abutment area is formed on the bottom wall of the plane outside the vertical punching hole. The spherical protrusions of adjacent core pieces can abut against the abutment area and are located outside the vertical punching hole.

[0019] This application provides a method for manufacturing an iron core and the iron core itself. Each core piece has rivet grooves that can rotate 180 degrees and overlap, and integrates a planar bottom wall, inclined side walls, spherical protrusions, vertical stamping holes, and arc-shaped motion guide grooves. This allows the core pieces to naturally form an initial gap when stacked. A mandrel mechanism drives the odd and even pieces to rotate relative to each other, and the orderly expansion from the first gap to the second gap is guided by the spherical protrusions. This significantly increases the contact area and penetration depth of the material surface during painting and tempering. Limiting and stopping structures are provided between the rotating and non-rotating groups, supplemented by an odd number of position marking grooves to enable rapid and visual identification of whether the pieces are rotating, improving the controllability and inspection efficiency of the assembly process. This effectively suppresses the accumulation of deviations and assembly errors, giving the entire iron core manufacturing and assembly process high reliability, ease of operation, and comprehensive performance adaptable to multiple processing steps. Attached Figure Description

[0020] Figure 1 A schematic flowchart of the core manufacturing method provided in the embodiments of this application is shown;

[0021] Figure 2 This paper shows a schematic diagram of the mandrel mechanism provided in an embodiment of this application in a horizontal state;

[0022] Figure 3 This illustration shows a structural diagram of the iron core sheet provided in this application after passing through the first riveting and stamping station;

[0023] Figure 4 This illustration shows a structural diagram of the iron core sheet provided in this embodiment after passing through the second riveting stamping station;

[0024] Figure 5 This illustration shows a structural diagram of the iron core sheet provided in this embodiment after passing through the third riveting and stamping station;

[0025] Figure 6 This paper shows a schematic diagram of the structure of multiple iron core monoliths stacked in an embodiment of this application;

[0026] Figure 7 A schematic diagram of the structure of the rotary drive assembly provided in an embodiment of this application is shown;

[0027] Figure 8 This paper shows a schematic diagram of the location of the slide provided in an embodiment of this application;

[0028] Figure 9 It shows Figure 8 Enlarged view of section A in the image;

[0029] Figure 10 A schematic diagram of the push block and slider provided in an embodiment of this application is shown;

[0030] Figure 11 A schematic diagram of the limiting hole provided in an embodiment of this application is shown;

[0031] Figure 12 This illustration shows a schematic diagram of the state of a single core piece under the first gap, as provided in an embodiment of this application.

[0032] Figure 13 A schematic diagram of the state of a single core piece under the second gap provided in an embodiment of this application is shown.

[0033] In the diagram: 10. Core structure; 20. Mandrel mechanism; 30. Stop mechanism; 11. Inclined sidewall; 12. Flat bottom wall; 13. Motion guide groove; 14. Position marking groove; 21. Switching seat; 22. Misalignment drive assembly; 23. Arc-shaped inlet end; 24. Rotation drive assembly; 31. Limiting post; 32. Misalignment stop; 33. Pad; 34. Limiting hole; 111. Rounded corner edge; 121. Vertical punching hole; 122. Abutment area; 123. Spherical protrusion; 131. First guide end; 132. Second guide end; 241. Rotating cylinder; 242. Slide block; 243. Drive motor; 244. Meshing wall; 2411. Slide groove; 221. Power supply post; 222. Slider; 223. Push block. Detailed Implementation

[0034] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0035] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0036] Please see Figures 1 to 13As shown in the figure, this application provides a method for manufacturing an iron core, including:

[0037] S10. Stamp a single iron core piece at the first rivet stamping station, and form multiple rivet grooves on the single iron core piece that can overlap in position after axial rotation of 180 degrees. The rivet groove includes a flat bottom wall 12.

[0038] S20. The planar bottom wall 12 is stamped a second time at the second rivet stamping station to form a spherical protrusion 123 on the outside of the planar bottom wall 12 and a vertical stamping hole 121 located in the planar bottom wall 12. The diameter of the opening of the vertical stamping hole 121 is smaller than the maximum diameter of the spherical protrusion 123.

[0039] S30. At the third rivet stamping station, the rivet position is stamped three times to form a unidirectional motion guide groove 13 on the edge of the rivet groove.

[0040] S40. Multiple iron core pieces after being stamped at the third rivet stamping station are stacked sequentially on the mandrel mechanism 20. The spherical protrusion 123 does not completely enter the vertical stamping hole 121, forming a first gap between the multiple iron core pieces.

[0041] S50. Using the spindle mechanism 20, all the iron core pieces are staggered and arranged into odd and even groups of iron core pieces through the first gap, and one of the odd or even pieces is driven to rotate relative to the other.

[0042] S60. During the process of using the spindle mechanism 20 to drive one of the odd-numbered or even-numbered pieces to rotate relative to the other, the spherical protrusion 123 disengages from the rivet groove opening in the adjacent iron core piece and moves towards the surface of the iron core structure 10 through the motion guide groove 13 in the rivet groove; the spacing between multiple iron core pieces increases from the first gap to the second gap.

[0043] S70. All core pieces are transferred to the painting station and / or tempering station while maintaining a second gap between them. The paint or heat can make deep contact with each core piece over a large area, thereby better completing the painting and / or tempering process.

[0044] S80. Continue to use the spindle mechanism 20 to drive one of the odd-numbered or even-numbered pieces to rotate, so that the final stopping position is 180 degrees from the initial position, so as to change the working position due to the accumulation of errors during the processing.

[0045] S90, the final stamping station, impacts the rivet grooves in the core pieces to eliminate the gaps between each core piece.

[0046] It should be noted that in this embodiment, the first rivet stamping station forms a rivet groove with a flat bottom wall 12 on the iron core sheet by stamping. This structure can achieve symmetrical alignment after the iron core sheet is rotated 180 degrees axially, which forms a necessary foundation for the subsequent final stacking and mating. If they cannot be aligned, the accumulated errors during the processing will cause the rivet grooves to be misaligned after position adjustment, making it difficult to complete the final stamping process to eliminate gaps. The second rivet stamping station further performs a secondary stamping on the bottom wall of the groove, causing it to bulge outward to form a spherical protrusion 123. At the same time, a diameter smaller than the spherical protrusion is inserted into the bottom wall. The vertical punch hole 121 of 123 limits the mating depth of the spherical protrusion 123 and presets an interference amount, so that adjacent stacked iron core pieces cannot be completely matched when they overlap, thus forming a preliminary first gap; the third riveting stamping station processes a unidirectional motion guide groove 13 at the edge of the groove, so that the spherical protrusion 123 can move along the guide groove towards the surface of the iron core piece during relative rotation, thereby reducing the difficulty of rotation between multiple iron core pieces, increasing the feasibility of misaligned rotation between them, reducing the driving difficulty of the mandrel mechanism 20, and effectively avoiding the misalignment between two adjacent iron core pieces. The sheet undergoes hard frictional breakage during initial rotation; the mandrel mechanism 20 is used to sequentially stack multiple iron core sheets that have undergone three stampings, ensuring that the spherical protrusion 123 has not yet been fully inserted into the vertical stamping hole 121 of the lower sheet, thereby forming a first gap between adjacent sheets. The setting of the first gap helps the subsequent mandrel mechanism 20 to drive the rotation at intervals; driven by the mandrel mechanism 20, odd and even numbered sheets can rotate relative to each other. During rotation, the spherical protrusion 123 disengages from the snap-in position of the rivet groove and rises upward along the motion guide groove 13, causing the gap to gradually expand from the first gap to the second gap, thereby achieving The effective separation space between the iron core pieces; the iron core structure 10 in the second gap state facilitates the full contact of paint or heat with the surface of each iron core piece during the painting or tempering process, improving the uniformity of processing and the depth of processing; improving processing efficiency, after the painting or tempering is completed, the mandrel mechanism 20 is used again to complete a 180-degree rotation, so that the final angle of the piece group is misaligned compared with the initial state, which is used to disperse the impact of accumulated error on the stacking integrity; the final stamping station impacts the grooves of each rivet point, so that the original second gap is compacted and eliminated, enhancing the fastening stability and overall performance of the iron core structure 10.

[0047] like Figure 1 As shown, in some examples, further, before stacking the core sheets, position marking slots 14 are equidistantly stamped on the peripheral sidewalls of the core sheets, and the number of position marking slots 14 is odd.

[0048] Understandably, the position marking slots 14 are located on the peripheral sidewalls of the core pieces and are arranged equidistantly in an odd number in the circumferential direction. They are used to provide a visual identification basis during stacking and subsequent rotation. When each piece is not rotated, the position marking slots 14 are aligned axially and appear as a neat line when viewed from the front view. After rotation, because the number is set to an odd number, the marking slots are no longer axially aligned and appear to be staggered. This facilitates quick judgment of whether there is a misaligned rotation action, thereby confirming whether the processing technology is executed correctly. It also provides a basis for inspecting the positional changes after group rotation, effectively avoiding assembly errors and repetitive work caused by visual illusions or workstation interference. By simply observing, it can be determined whether each piece in the core structure 10 has completed the relative rotation of the predetermined angle, improving process reliability and on-site operation efficiency.

[0049] like Figure 1 As shown, in some examples, further, in the odd-numbered or even-numbered core pieces, one is a non-rotating core group and the other is a rotating core group, and the position marking groove 14 in the non-rotating core group is limited by the stop mechanism 30.

[0050] In this example, the stop mechanism 30 is used to limit the rotational freedom of the non-rotating core group during the stacking process. By contacting and engaging with the position marking slot 14, it ensures that the core pieces of the non-rotating core group maintain their original angles during the drive rotation phase, preventing overall rotational offset and thus forming an angular reference relative to the rotatable group. The structure of the stop mechanism 30 enables stable engagement with the marking slot. When the spindle mechanism 20 starts driving the rotating group to rotate, the non-rotating group remains stationary due to the stop constraint. The rotating group generates angular displacement under axial control, achieving relative misalignment within a predetermined angle range. This ensures that the two groups of pieces have different angular levels during painting, tempering, or final positioning. Simultaneously, the stop mechanism 30, through its engagement with the position marking slot 14, also serves as a visual reference. After rotation, the accuracy of the operation can be confirmed by checking whether the slots are misaligned, improving the efficiency of visual feedback of the rotational action and the fault tolerance during the assembly process.

[0051] like Figure 4 , Figure 5 , Figure 7 and Figure 10As shown, in some examples, the spindle mechanism 20 further includes: a switching seat 21, a misalignment drive assembly 22, an arc-shaped inlet end 23, and a rotation drive assembly 24. The switching seat 21 can switch between a horizontal state and a vertical state under the action of an external force; the misalignment drive assembly 22 is disposed on the switching seat 21 and is used to drive each core piece connected to the rotating core assembly; the arc-shaped inlet end 23 is fixedly disposed on the outer end of the switching seat 21; the rotation drive assembly 24 is disposed in the inner cavity between the switching seat 21 and the arc-shaped inlet end 23 and is used to drive the rotating core assembly to rotate.

[0052] In this example, the mandrel mechanism 20 achieves the overall working mode change through the switching seat 21, switching between horizontal and vertical states to adapt to the process requirements of different stages. The switching action is completed by externally applied control force. For example, when the mandrel mechanism 20 receives the iron core pieces from the stamping station, it is in a vertical state, so that each stamped iron core piece can naturally fit onto the mandrel mechanism 20 under the action of gravity. In the subsequent rotation and gap adjustment process, the mandrel mechanism 20 is in a horizontal state to prevent the accumulation of gravity. The driving difficulty of multiple iron core pieces in the horizontal state is much less than the upward movement difficulty of vertically arranged iron core pieces. The misalignment drive assembly 22 is installed on the switching seat 21 and is responsible for transmitting the driving force to each iron core piece in the rotating iron core group one by one. Through structural cooperation, it ensures that the pieces inside the rotating group rotate synchronously, thereby completing the misalignment adjustment of the predetermined angle. The arc-shaped introduction end 23 is set at the outer end of the switching seat 21, and the bottom end of the arc-shaped introduction end 23 completely covers the outer end of the mandrel mechanism 21. The outer end of the rotary drive assembly 24, the arc-shaped inlet end, guides the stamped iron core pieces to be fitted one by one onto the mandrel mechanism 20, preventing jamming or damage, and ensuring automatic position correction of each iron core piece during descent. The bottom wall of the arc-shaped inlet end 23 and the rotary drive assembly 24 achieve a smooth transition of rotational force. The rotary drive assembly 24 is located in the inner cavity between the switching seat 21 and the arc-shaped inlet end 23, in the core transmission path, and is connected to the misalignment drive assembly 22 through mechanical transmission, indirectly completing the overall or group angle adjustment of the rotating iron core group. The rotation process is determined by the specific process state to start or stop. Through the setting of this example, the rotating iron core group will produce angular offset or continuous rotation during the tempering and painting processes after stacking, ensuring that the position of each piece is clear, the gap is uniform, and the consistency of each process direction is high during painting, tempering and other processes. At the same time, the transformation between processing state and transmission state can be quickly completed through structural switching, improving equipment operating efficiency and control flexibility.

[0053] like Figure 5 , Figure 9 and Figure 11As shown, in some examples, the stop mechanism 30 further includes: a limiting post 31, a misaligned stop 32, two pads 33, and a limiting hole 34. The limiting post 31 is fixedly installed on the outer wall of the spindle mechanism 20 and corresponds to the position marking groove 14. The cross-section of the limiting post 31 is polygonal. The misaligned stop 32 is movably sleeved on the outer wall of the limiting post 31 along the length direction of the limiting post 31. The outer end of the misaligned stop 32 is located in the position marking groove 14 of each core piece in the non-rotating core group. The two pads 33 are fixedly installed at the upper and lower ends of the misaligned stop 32, respectively. The limiting hole 34 is opened on the outer end side wall of the misaligned stop 32 and is consistent with the opening direction of the motion guide groove 13.

[0054] In this example, the limiting post 31 is installed on the outer wall of the spindle mechanism 20. Its polygonal cross-section restricts the rotational freedom of the misalignment stop 32 while ensuring that the misalignment stop 32 can slide smoothly along the axial direction. The arrangement position of the limiting post 31 corresponds to the position marking groove 14, forming a one-to-one structural fit. There can be one or more limiting posts 31. When there are multiple limiting posts 31, the configuration of each limiting post 31 and the misalignment stop 32 on it is the same. The misalignment stop 32 can be linearly moved and sleeved on the limiting post 31. On the outer wall, its outer end is in a protruding state. The protruding position is inserted into the corresponding marking groove of each single piece of the non-rotating iron core group to achieve angle locking of each single piece of the non-rotating iron core group, so as to ensure that the non-rotating iron core group and the single pieces of the iron core group within the rotating iron core group undergo relative misalignment rotation; two pads 33 are fixed at the upper and lower ends of the misalignment stop 32, respectively, to limit the minimum interval of the misalignment stop 32 during the sliding process. This minimum interval is the same as the first gap formed by the stacking of the iron core pieces after normal impact. Therefore, in the default state In this state, the misalignment stop 32 can be directly aligned with the intercepted iron core piece; the limiting hole 34 is set on the outer end side wall of the stop and is aligned with the direction of the motion guide groove 13, so that during the initial rotation of the rotating iron core assembly, due to its contact with the iron core pieces in the non-rotating iron core assembly, the iron core pieces in the non-rotating iron core assembly will be driven to rotate slightly during the rotation. During this slight rotation, the iron core pieces in the non-rotating iron core assembly will enter the limiting hole 34, and then enter the motion guide groove 13 through the spherical protrusion. During the process of the gap widening in slot 13, the core pieces in the non-rotating core group are stuck in the limiting hole 34. During this process, the misalignment stop 32 will move synchronously with the axial movement of the core pieces to ensure that the stop mechanism 30 can limit the core in the non-rotating core group at all times during the gap widening adjustment process. Furthermore, in this complex movement process, it effectively ensures that the preset core pieces rotate in a more standardized relative manner with the core pieces in the non-rotating core group according to the predetermined rotation action.

[0055] like Figure 5 As shown, in some examples, further, one end of the motion guide groove 13 near the rivet groove is the first guide end 131, the other end of the motion guide groove 13 is the second guide end 132, the middle part of the motion guide groove 13 is arc-shaped, and the depth of the first guide end 131 is greater than the depth of the second guide end 132.

[0056] In this example, the motion guide groove 13 is located at the edge of the groove opening of the rivet groove. Its structure includes a first guide end 131, an arc-shaped middle section, and a second guide end 132. The first guide end 131 is close to the rivet groove and has a large depth. Initially, it can accommodate the partial embedding of the spherical protrusion 123 to achieve initial introduction and guiding engagement. After the rotation drive starts, the spherical protrusion 123 gradually slides along the arc-shaped middle section. Under the guidance of the guide structure, it completes the transition of the movement path from the bottom of the rivet groove to the outer surface. The arc-shaped structure provides a continuous and smooth motion trajectory to prevent structural jamming or impact caused by sudden changes in direction. The second guide end 132 is shallower and close to the outer edge area of ​​the iron core piece. When the spherical protrusion 123 slides to this section, it gradually leaves the original engagement position, causing the spherical protrusion 123 to form a larger gap with the adjacent piece, thereby realizing the transition from the first gap to the second gap.

[0057] like Figure 7 and Figure 8 As shown, in some examples, the rotary drive assembly 24 further includes: a rotary cylinder 241, a slide block 242, a drive motor 243, and a meshing wall 244. The rotary cylinder 241 is rotatably sleeved on the outer wall of the switching seat 21. The slide block 242 is arranged in a ring shape and is located on the end face of the rotary cylinder 241 connected to the slide rail on the wall of the switching seat 21. The drive motor 243 is fixedly installed in the inner cavity of the switching seat 21, and a drive gear is provided on the output shaft of the drive motor 243. The meshing wall 244 is fixed on the inner wall of the rotary cylinder 241, and an internal gear is provided on the meshing wall 244, which meshes with the drive gear.

[0058] In this example, the rotating cylinder 241 is sleeved on the outer wall of the switching seat 21. It forms the output carrier of the rotating drive component together with the meshing wall 244. Under the action of the drive input, it can drive the entire rotating iron core assembly to rotate around the core shaft. The slide 242 is arranged in a ring structure on the inner end face of the rotating cylinder 241 and is connected to the slide rail on the wall of the switching seat 21 to realize the smooth rotation guidance and support positioning of the rotating cylinder 241 relative to the switching seat 21. The drive motor 243 is fixed in the inner cavity of the switching seat 21. The drive gear on its output shaft is the core component for power transmission. The meshing wall 244 is fixed on the inner wall of the rotating cylinder 241 and is provided with a ring internal gear structure. The internal gear directly meshes with the drive gear on the output shaft of the drive motor 243. After the motor is powered on, it drives the drive gear to rotate, and then drives the meshing wall 244 to rotate through the gear meshing action, so that the rotating cylinder 241 as a whole generates continuous rotation, completes the relative angle adjustment of the chip assembly, and makes the power output structure stable, responsive, and smooth in operation.

[0059] like Figure 8 As shown, in some examples, further, the rotating cylinder 241 has multiple through-type linear grooves 2411 equidistantly opened on its wall surface. The grooves 2411 are opened along the axial direction of the iron core. The misalignment drive assembly 22 includes: at least one power supply post 221, a plurality of sliders 222 and push blocks 223. The at least one power supply post 221 is disposed in the gap between the switching seat 21 and the rotating cylinder 241 and can rotate with the rotating cylinder 241. The power supply post 221 can be connected to an external power source through a slip ring. The plurality of sliders 222 are connected to each of the rotating iron cores in the assembly. Corresponding to the position of each iron core piece, an electromagnet is provided in the inner wall of the end of each slider 222 that contacts the adjacent slider 222. The electromagnet can be connected to the power supply post 221. The electromagnet is used to generate a repulsive force between two adjacent sliders 222 to help increase the thrust between each iron core piece structure from the first gap to the second gap. The push block 223 is fixedly set on the outside of each slider 222. The position of each push block 223 corresponds to the position of each iron core piece in the rotating iron core assembly. The push block 223 can enter the first gap by rotation.

[0060] In this example, multiple linear grooves 2411 are equidistantly arranged on the wall of the rotating cylinder 241 along the axial direction of the iron core. Each groove 2411 penetrates the body of the rotating cylinder 241, forming the movement path of the slider 222 and push block 223 assembly. The power supply post 221 is located in the gap between the switching seat 21 and the rotating cylinder 241, and structurally can rotate synchronously with the rotating cylinder 241. One end of the post is connected to an external power source through a slip ring to ensure that the electromagnetic unit inside the slider 222 continuously receives power during rotation. Each slider 222 corresponds one-to-one with the position of each iron core piece in the rotating iron core assembly and is movably arranged along the groove 2411. An electromagnet structure is provided on the inner wall of the contact end of adjacent sliders 222. After the power supply post 221 is connected to the power source, a repulsive magnetic field is formed between adjacent electromagnets. This repulsive force is used to assist in pushing adjacent sliders 222. 22 generates a spacing expansion in the axial direction. Push blocks 223 are fixedly installed on the outside of each slider 222, facing the stacking surface of the rotating iron core group. As the slider 222 moves, the push blocks 223 will partially enter the first gap between adjacent iron core pieces, further promoting structural separation between the iron core pieces, expanding the first gap to the second gap. During the pushing process, the electromagnetic repulsion force and the physical intervention of the push blocks 223 work together on the iron core piece structure, thereby improving the separation efficiency and piece consistency. Therefore, the entire structure of this example achieves rapid separation and adjustment of the iron core structure 10 before painting or heat treatment, as well as rapid and low-damage rotation drive effect through the combined action of electromagnetic thrust and the snapping force of the push blocks 223. This improves the coverage of the treatment effect, reduces the need for manual intervention, and maintains good reset conditions during subsequent angle rotation and clamping processes.

[0061] like Figures 2 to 4 As shown, this application embodiment also provides an iron core, which is manufactured by the iron core manufacturing method provided by any of the foregoing technical solutions;

[0062] The iron core includes multiple rivet grooves that can coincide through 180-degree rotation, and also includes: inclined sidewalls 11, flat bottom walls 12, rounded edges 111, motion guide grooves 13, position marking grooves 14 (and vertical stamping holes 121). The inclined sidewalls 11 are formed circumferentially in each rivet groove; the flat bottom walls 12 are formed on the bottom walls of each rivet groove; the rounded edges 111 are located on the edge of the groove opening of the rivet groove; the motion guide groove 13 includes a first guide end 131 located inside the rivet groove and a second guide end 132 extending outside the rivet groove. The middle part of the motion guide groove 13 is concentrically arranged with the iron core monolith. The guide end 131 has a greater depth than the second guide end 132; the position marking groove 14 is opened on the outer side wall of the iron core piece, and the number of position marking grooves 14 opened on each iron core piece is odd; the vertical punching hole 121 is opened in the middle of the planar bottom wall 12, and a spherical protrusion 123 is formed outside the vertical punching hole 121. The diameter of the opening of the vertical punching hole 121 is smaller than the maximum diameter of the spherical protrusion 123. The wall surface of the planar bottom wall 12 outside the vertical punching hole 121 forms an abutment area 122. The spherical protrusion 123 of the adjacent iron core piece can abut in the abutment area 122 and be located outside the vertical punching hole 121.

[0063] The core structure 10 is formed by stacking multiple core pieces of the same shape. Each core piece has several rivet grooves that can rotate 180 degrees and overlap. The rivet grooves have inclined sidewalls 11 around their circumference to guide the spherical protrusions 123 toward the inside of the groove during pressing or rotation, enhancing the smoothness of the transition during mating. The bottom forms a flat bottom wall 12, providing sufficient contact area and forming a stable platform for subsequent secondary stamping. The rounded corners 111 are located at the groove openings, which can reduce structural stress concentration and assist the spherical protrusions 123 in smoothly exiting the grooves. The motion guide groove 13 extends from the inside of the rivet grooves to the outside, and is concentrically set with the core piece in the middle of the path, forming an arc-shaped structure. The first guide end 131, which is closer to the rivet groove, is deeper and can accommodate the initial insertion section of the spherical protrusions 123. During rotation, the spherical protrusions 123 are gradually moved outward along the guide groove path, so that the core pieces form a transition state from contact to gap. The second guide end 132 is shallower. The spherical protrusions 123 are used to control the final disengagement of the spherical protrusions 123 from the grooves and maintain a large gap. An odd number of position marking grooves 14 are opened on the outer side wall of the iron core piece to determine the rotation state through a visual arrangement. The vertical punching hole 121 is set in the middle of the planar bottom wall 12 and forms the outer spherical protrusions 123. The spherical protrusions 123 are used to insert into the grooves of adjacent pieces during the stacking process to achieve initial positioning. The diameter of the hole is smaller than the maximum diameter of the spherical protrusions 123, which restricts the insertion action. On the one hand, it prevents the structure from being completely inserted and stuck. On the other hand, the outer side of the planar bottom wall 12 forms an abutment area 122. The abutment area 122 contacts the adjacent spherical protrusions 123 to control the insertion force and form an initial gap. This helps to use the mandrel mechanism 20 to expand the first gap into a second gap, which helps to perform more effective depth processing in subsequent processes. At the same time, the setting of the motion guide groove 13 helps to achieve a relatively low-damage rotation effect between two adjacent iron core pieces, thereby avoiding the center of gravity problem caused by the accumulation of errors.

[0064] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable, computer-readable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0065] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A method for manufacturing an iron core, characterized in that, include: A single iron core piece is stamped at the first rivet stamping station, and multiple rivet grooves that can overlap in position after axial rotation of 180 degrees are formed on the single iron core piece. The rivet groove includes a flat bottom wall (12). The planar bottom wall (12) is stamped a second time at the second rivet stamping station to form a spherical protrusion (123) on the outside of the planar bottom wall (12) and a vertical stamping hole (121) located in the planar bottom wall (12). The diameter of the opening of the vertical stamping hole (121) is smaller than the maximum diameter of the spherical protrusion (123). The rivet point is stamped three times at the third rivet point stamping station to form a unidirectional motion guide groove (13) on the edge of the groove of the rivet point groove. Multiple iron core pieces after being stamped at the third rivet stamping station are stacked sequentially on the mandrel mechanism (20). The spherical protrusion (123) does not completely enter the vertical stamping hole (121), forming a first gap between the multiple iron core pieces. The mandrel mechanism (20) uses the first gap to stagger all the iron core pieces into odd and even number of iron core pieces, and drives one of the odd or even pieces to rotate relative to the other. The final stopping position is 180 degrees from the initial position, so as to change the working position due to the accumulation of errors during the processing.

2. The method for manufacturing an iron core according to claim 1, characterized in that: During the process of using the spindle mechanism (20) to drive one of the odd or even pieces to rotate relative to the other, the spherical protrusion (123) disengages from the rivet groove in the adjacent iron core piece and moves toward the surface of the iron core structure (10) via the motion guide groove (13) in the rivet groove. The spacing between the multiple iron core pieces is increased from the first gap to the second gap.

3. The method for manufacturing an iron core according to claim 2, characterized in that: Before stacking the iron core pieces, position marking grooves (14) are punched at equal intervals on the peripheral sidewalls of the iron core pieces, and the number of position marking grooves (14) is odd.

4. The method for manufacturing an iron core according to claim 3, characterized in that: In the odd-numbered or even-numbered iron core pieces, one is a non-rotating iron core group and the other is a rotating iron core group. The position marking groove (14) in the non-rotating iron core group is limited by the stop mechanism (30).

5. The method for manufacturing an iron core according to claim 4, characterized in that: The spindle mechanism (20) includes: The switching seat (21) can switch between a horizontal state and a vertical state under the action of external force; The misalignment drive assembly (22) is disposed on the switching seat (21) and is used to drive each core piece connected to the rotating core assembly. The arc-shaped lead end (23) is fixedly disposed at the outer end of the switching seat (21); A rotary drive assembly (24) is disposed in the cavity between the switching seat (21) and the arc-shaped inlet end (23); it is used to drive the rotating iron core assembly to rotate.

6. The method for manufacturing an iron core according to claim 5, characterized in that: The stopping mechanism (30) includes: A limiting post (31) is fixedly installed on the outer wall of the spindle mechanism (20) and is located corresponding to the position marking groove (14). The cross section of the limiting post (31) is polygonal. The misalignment stop (32) is sleeved on the outer wall of the limiting post (31) and can move along the length direction of the limiting post (31). The outer end of the misalignment stop (32) is located in the position marking groove (14) of each core piece in the non-rotating core group. Two pads (33) are fixedly installed at the upper and lower ends of the misalignment stop (32); The limiting hole (34) is opened on the outer end side wall of the misalignment stop (32) and is consistent with the opening direction of the motion guide groove (13).

7. The method for manufacturing an iron core according to claim 5, characterized in that: The motion guide groove (13) has a first guide end (131) at one end near the rivet groove, and a second guide end (132) at the other end. The middle part of the motion guide groove (13) is arc-shaped, and the depth of the first guide end (131) is greater than the depth of the second guide end (132).

8. The method for manufacturing an iron core according to claim 5, characterized in that: The rotary drive assembly (24) includes: A rotating cylinder (241) is rotatably mounted on the outer wall of the switching seat (21); The slide (242) is arranged in a ring and is located on the end face of one side of the slide rail of the switching seat (21) in the rotating cylinder (241); A drive motor (243) is fixedly installed in the inner cavity of the switching seat (21), and a drive gear is provided on the output shaft of the drive motor (243); A meshing wall (244) is fixed on the inner wall of the rotating cylinder (241). An internal gear is provided on the meshing wall (244), and the internal gear meshes with the drive gear.

9. The method for manufacturing an iron core according to claim 8, characterized in that: The rotating cylinder (241) has multiple through-type linear grooves (2411) evenly spaced on its wall surface. The grooves (2411) are opened along the axial direction of the iron core. The misalignment drive assembly (22) includes: At least one power supply post (221) is disposed in the gap between the switching seat (21) and the rotating cylinder (241) and is able to rotate with the rotating cylinder (241). The power supply post (221) can be connected to an external power source through a collector ring. A plurality of sliders (222) are provided, corresponding to the position of each core piece in the rotating core assembly. An electromagnet is provided in the inner wall of the end of each slider (222) that contacts the adjacent slider (222). The electromagnet can be connected to the power supply post (221). The electromagnet is used to generate a repulsive force between two adjacent sliders (222) to help increase the thrust between each core piece structure from the first gap to the second gap. Push blocks (223) are fixedly disposed on the outside of each slider (222). The position of each push block (223) corresponds to the position of each iron core piece in the rotating iron core assembly. The push blocks (223) can rotate into the first gap.

10. A core, characterized in that: The iron core is manufactured by the method of any one of claims 1-9, the iron core including a plurality of rivet grooves that can coincide by rotating 180 degrees, and further comprising: Inclined sidewalls (11) are formed circumferentially in each of the rivet grooves; A planar bottom wall (12) is formed on the bottom wall of each of the rivet grooves; The rounded corner (111) is located on the edge of the groove of the rivet point groove; The motion guide groove (13) includes a first guide end (131) located in the rivet groove and a second guide end (132) extending out of the rivet groove. The middle part of the motion guide groove (13) is concentrically arranged with the iron core piece. The depth of the first guide end (131) is greater than that of the second guide end (132). Position marking slots (14) are formed on the outer side wall of the iron core sheet, and the number of position marking slots (14) formed on each iron core sheet is odd. A vertical punching hole (121) is formed in the middle of the planar bottom wall (12). A spherical protrusion (123) is formed outside the vertical punching hole (121). The diameter of the opening of the vertical punching hole (121) is smaller than the maximum diameter of the spherical protrusion (123). An abutment area (122) is formed on the wall surface of the planar bottom wall (12) outside the vertical punching hole (121). The spherical protrusion (123) of the adjacent iron core piece can abut in the abutment area (122) and is located outside the vertical punching hole (121).

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