Five-column rotary core punching die layout with hierarchical incremental guiding hole arrangement

Abstract

The application discloses a five-column rotary core punching die layout with hierarchical incremental guide hole arrangement, wherein a first forming module and a second forming module are arranged in a first column forming area and a fifth column forming area respectively; a third forming module and a fourth forming module are arranged in a second column forming area and a fourth column forming area respectively; and a fifth forming module is arranged in a third column forming area, namely a middle column forming area; the first forming module and the second forming module are each provided with three guide hole punches in a direction perpendicular to a material belt conveying direction; the fourth forming module is provided with four guide hole punches in the direction perpendicular to the material belt conveying direction; and the fifth forming module is provided with six guide hole punches in the direction perpendicular to the material belt conveying direction; the hierarchical arrangement of the guide hole numbers increasing with the stations enables the guide capacity of each stage to be matched with the actual deformation degree of the material belt, so that the structure is simple and the material belt occupation is reduced in the early stage of light-weight guide; the cumulative deformation is offset in the middle and later stages of strengthened guide, the precision of the key process in the last column is ensured, and the production capacity and quality are considered.

Description

Technical Field

[0001] This invention relates to the technical field of iron core processing, and in particular to a five-row rotary iron core lamination die layout with a graded incremental guide hole arrangement. Background Technology

[0002] The motor core is formed by stacking multiple silicon steel laminations, and its dynamic balance performance directly affects the vibration and noise levels of the motor. To ensure excellent dynamic balance performance after assembly, current stamping processes widely adopt a single-piece rotary stacking forming scheme. In this scheme, each lamination is stacked and rotated sequentially at a specific angle to offset the imbalance introduced by individual laminations due to their own dimensional deviations, material anisotropy, and other factors, thereby reducing motor vibration and noise.

[0003] Currently, the mainstream solutions for mass production dies for rotary iron cores in the industry are single-row, double-row, and triple-row rotary structures. For example, patent document CN119628341A discloses a rotor iron core skew-rotation forming process, and patent document CN122092596A discloses a method for reducing iron loss in motor iron core laminations. However, such layout methods have limited material strip utilization and low stamping production efficiency, making it difficult to meet the needs of large-scale mass production. To improve material utilization and stamping production efficiency, the industry urgently needs to develop five-row multi-station rotary iron core progressive dies. Theoretically, a five-row layout can simultaneously stamp more laminations within a unit strip width, thereby significantly improving material utilization and output efficiency.

[0004] However, multi-row synchronous stamping has unavoidable defects in actual processes. After the silicon steel strip undergoes successive stamping processes in the preceding stations, the rolling stress and stamping shear stress inside the sheet are released simultaneously, inevitably causing deformation defects such as tensile stretching, lateral warping, and deviation. The more rows of the stamping, the greater the accumulated deformation in the preceding stations, and the more difficult it is to control the flatness and positioning accuracy of the strip. This leads to a loss of control over the consistency of the core's shape, inner hole, and stacking rotation positioning dimensions in subsequent stations. The final finished core exhibits batch quality problems such as thickness differences, excessive burrs, uneven stacking gaps, and large dynamic balance fluctuations, failing to meet the requirements for stable mass production of cores.

[0005] In summary, how to achieve efficient stamping of multi-row, multi-station rotary core continuous dies while effectively suppressing the accumulation of strip deformation and positioning loss caused by multi-row synchronous punching, and ensuring the accuracy of rotary stacking and the consistency of finished products, has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] To address the problems in the prior art, the technical problem to be solved by the present invention is to provide a five-column rotary core lamination die layout with a graded incremental guide hole arrangement that can avoid positioning loss of control, reduce the accumulation of strip deformation caused by synchronous punching, and improve punching accuracy.

[0007] The technical solution provided by the present invention to solve the above-mentioned technical problems is as follows: a five-row rotary iron core stamping die with a graded incremental guide hole arrangement, comprising five forming modules arranged sequentially along the material conveying direction: a first forming module, a second forming module, a third forming module, a fourth forming module, and a fifth forming module. Each of the forming modules includes multiple stamping stations arranged sequentially along the conveying direction of the material belt; Each of the five forming modules defines five columns of forming areas extending side by side along the length of the material conveyor track, and multiple rows of forming positions distributed in a staggered manner along the width of the track. The center of each of the five forming modules is aligned with the center of each forming position in the corresponding forming area. The first molding module and the second molding module are respectively arranged in the first column molding area and the fifth column molding area; the third molding module and the fourth molding module are respectively arranged in the second column molding area and the fourth column molding area; the fifth molding module is arranged in the third column molding area, i.e. the middle column molding area. The first forming module and the second forming module each have three guide hole punches in a direction perpendicular to the conveying direction of the material belt; the fourth forming module has four guide hole punches in a direction perpendicular to the conveying direction of the material belt; and the fifth forming module has six guide hole punches in a direction perpendicular to the conveying direction of the material belt.

[0008] The preferred technical solution provided by the present invention to solve the above-mentioned technical problems is as follows: the first stamping station included in each group of forming modules is a pre-punching station, which is used to pre-punch the center hole of the iron core on the strip; each of the guide hole punches is located before the pre-punching station of the corresponding forming module in the strip conveying direction.

[0009] The preferred technical solution provided by the present invention to solve the above-mentioned technical problem is as follows: two of the three guide hole punches configured on the first forming module correspond to the second column forming area and the fifth column forming area respectively, and the other guide hole punch is located outside the first column forming area.

[0010] The preferred technical solution provided by the present invention to solve the above-mentioned technical problems is as follows: In the first forming module, the two guide hole punches located outside the first column forming area and corresponding to the second column forming area are located in the material conveying direction at the adjacent row spacing in front of the forming position corresponding to the pre-punching station of the first forming module; the guide hole punches corresponding to the fifth column forming area are located in the same row of the forming position corresponding to the pre-punching station of the first forming module in the material conveying direction.

[0011] The preferred technical solution provided by the present invention to solve the above-mentioned technical problem is as follows: two of the three guide hole punches configured on the second forming module correspond to the second column forming area and the fourth column forming area respectively, and the other guide hole punch is located outside the fifth column forming area.

[0012] The preferred technical solution provided by the present invention to solve the above-mentioned technical problem is as follows: the three guide hole punches configured on the second forming module are all located in the material conveying direction at the adjacent row distance in front of the forming position corresponding to the pre-punching station of the second forming module.

[0013] The preferred technical solution provided by the present invention to solve the above-mentioned technical problem is as follows: among the four guide hole punches provided on the third forming module, the first guide hole punch corresponds to the outer side of the fifth column forming area, the second guide hole punch corresponds to the outer side of the first column forming area, the third guide hole punch corresponds to the third column forming area, and the fourth guide hole punch is located at the middle position between the guide hole punch outside the first column forming area and the second column forming area in a direction perpendicular to the material conveying direction.

[0014] The preferred technical solution provided by the present invention to solve the above-mentioned technical problems is as follows: among the four guide hole punches provided on the third forming module, the guide hole punch corresponding to the third column forming area is located in the material conveying direction at the adjacent row distance in front of the forming position corresponding to the pre-punching station of the third forming module; the other three guide hole punches are all located in the same row of the forming position corresponding to the pre-punching station of the third forming module in the material conveying direction.

[0015] The preferred technical solution provided by the present invention to solve the above-mentioned technical problems is as follows: the arrangement of the four guide hole punches on the fourth forming module is opposite to the arrangement of the four guide hole punches on the third forming module in a direction perpendicular to the material conveying direction; and the row arrangement of each guide hole punch on the two forming modules is the same.

[0016] The preferred technical solution provided by the present invention to solve the above-mentioned technical problem is as follows: among the six guide hole punches provided on the fifth forming module, the first guide hole punch corresponds to the outer side of the fifth column forming area, the second guide hole punch corresponds to the outer side of the first column forming area, the third and fourth guide hole punches are located on both sides of the second column forming area and between the first column forming area and the third column forming area in a direction perpendicular to the material conveying direction, and the fifth and sixth guide hole punches are located on both sides of the fourth column forming area and between the fifth column forming area and the third column forming area in a direction perpendicular to the material conveying direction.

[0017] The preferred technical solution provided by the present invention to solve the above-mentioned technical problems is as follows: among the six guide hole punches provided on the fifth forming module, the two outer guide hole punches are located in the material conveying direction at the adjacent row spacing in front of the forming position corresponding to the pre-punching station of the fifth forming module; the remaining four middle guide hole punches are all located in the same row of the forming position corresponding to the pre-punching station of the fifth forming module in the material conveying direction.

[0018] The preferred technical solution provided by the present invention to solve the above-mentioned technical problems is as follows: each group of forming modules includes, in sequence after the pre-punching station, a rotor slot punching station, a central stepped hole punching station, a rotor counting punching station, a rotor stacking and riveting punching station, a rotor shaft hole punching station, an idle step station, and a rotor blanking station. Compared with existing technologies, the advantages of this invention are as follows: In the above scheme, the number of guide hole punches is not uniformly set, but increases as the strip progresses to different stages. This is because the strip experiences only a small amount of local stress release in the preceding workstations, resulting in a small deformation range, and three guide holes are sufficient for basic positioning. In the middle stage, after multiple punching operations, a large amount of stress is released, and the deformation increases significantly, requiring four guide holes to correct accumulated deviation. In the final stage, the deformation reaches its peak and is the critical final forming process, requiring six guide holes for full-area constraint and forced alignment. This graded layout of increasing guide hole numbers with each workstation ensures that the guiding capability at each stage matches the actual deformation degree of the strip—lightweight guiding in the early stages maintains a simple structure and reduces strip occupancy. Enhanced guiding in the middle and later stages offsets accumulated deformation, ensuring the accuracy of the final critical process and achieving a balance between production capacity and quality. Attached Figure Description

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0020] Figure 1 A schematic diagram of a five-row rotary core lamination die layout with a graded, incremental guide hole arrangement; Figure 2 A schematic diagram of the first forming module for a five-row rotary core lamination die with a graded and incremental guide hole arrangement; Figure 3 A schematic diagram of the second forming module for a five-row rotary core lamination die arrangement with a graded incremental guide hole layout; Figure 4 A schematic diagram of the third forming module for a five-row rotary core lamination die with a graded, incremental guide hole arrangement; Figure 5 A schematic diagram of the fourth forming module of a five-row rotary core lamination die with a graded and incremental guide hole arrangement. Figure 6 This is a schematic diagram of the fifth forming module of a five-row rotary core lamination die with a graded, incremental guide hole arrangement. Detailed Implementation

[0021] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of the invention.

[0022] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0023] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] like Figure 1As shown, this embodiment provides a five-column rotary core lamination die layout with a graded, progressively increasing guide hole arrangement, including five forming modules arranged sequentially along the material conveying direction: a first forming module 100, a second forming module 200, a third forming module 300, a fourth forming module 400, and a fifth forming module 500. Each forming module includes multiple stamping stations arranged sequentially along the material conveying direction. Each stamping station of the five forming modules defines five columns of forming areas extending parallel to each other along the length of the material conveying track, and multiple rows of forming positions staggered along the width of the track. The center of each stamping station is aligned with the center of each forming position in the corresponding forming area.

[0025] like Figure 1 As shown, the first forming module 100 and the second forming module 200 are respectively arranged in the first column forming area 1 and the fifth column forming area 5. The third forming module 300 and the fourth forming module 400 are respectively arranged in the second column forming area 2 and the fourth column forming area 4. The fifth forming module 500 is arranged in the third column forming area 3, i.e., the middle column forming area. The first forming module 100 and the second forming module 200 each have three guide hole punches in a direction perpendicular to the material conveying direction. The fourth forming module 400 has four guide hole punches in a direction perpendicular to the material conveying direction. The fifth forming module 500 has six guide hole punches in a direction perpendicular to the material conveying direction.

[0026] In this scheme, the number of guide hole punches is not uniformly set, but increases as the strip progresses through different stages. This is because the strip experiences only a small amount of localized stress release at the preceding stations, resulting in minimal deformation; three guide holes are sufficient for basic positioning. In the middle stage, after multiple punching operations, stress is released significantly, leading to a substantial increase in deformation, requiring four guide holes to correct accumulated deviation. In the final stage, deformation reaches its peak, and this is the critical final forming process, necessitating six guide holes for full-area constraint and forced alignment. This tiered layout, with the number of guide holes increasing with each station, ensures that the guiding capacity at each stage matches the actual deformation of the strip—lightweight guiding in the early stages maintains a simple structure and reduces strip occupancy. Enhanced guiding in the middle and later stages counteracts accumulated deformation, ensuring the accuracy of the final critical process and achieving a balance between production capacity and quality.

[0027] like Figure 1-6 As shown, preferably, the first stamping station in each forming module is a pre-punching station, used to pre-punch the center hole of the iron core on the strip.

[0028] It should be noted that, for ease of explanation, in this embodiment, the location of the workstation is indicated by the corresponding structure formed on the strip by the forming module. Therefore, for example, the corresponding reference numeral for the pre-punching station is marked at the corresponding pre-punched center hole, and the reference numeral for the guide hole also indicates the guide hole punch. Furthermore, for ease of explanation, the workstations corresponding to the forming modules are numbered accordingly.

[0029] like Figure 1-6 As shown, the first forming module 100 has a first pre-punching station 101; the second forming module 200 has a second pre-punching station 201; the third forming module 300 has a third pre-punching station 301; the fourth forming module 400 has a fourth pre-punching station 401; and the fifth forming module has a fifth pre-punching station 501.

[0030] like Figure 1-6 As shown, each guide hole punch is positioned before the pre-punching station of its corresponding forming module in the strip conveying direction. The placement of the guide hole punches before the pre-punching station means that when the strip enters each forming module, it is first precisely positioned by guide pins passing through guide holes, and then the pre-punching of the center hole and other punching processes are performed. This ensures that each punching action is carried out under precise constraint of the strip, avoiding center hole position deviation due to inaccurate positioning.

[0031] It should be noted that the center hole punched in the pre-punching process serves as the positioning datum for all subsequent processing steps of the iron core, and its positional accuracy directly affects the concentricity and stacking quality of the entire iron core. By first guiding the alignment and then punching, the positional accuracy of the pre-punched hole is ensured, thus providing a high-precision datum for all subsequent processes. The process sequence of step-by-step alignment and step-by-step punching ensures that the positioning accuracy of each station does not depend on the positioning status of the previous station, effectively breaking the chain of error accumulation.

[0032] like Figure 2 As shown, the three guide hole punches configured on the first forming module 100 include a first guide hole punch, a second guide hole punch, and a third guide hole punch. The first guide hole punch corresponds to the first guide hole 100a and is located outside the first column forming area 1. The second guide hole punch corresponds to the second guide hole 100b and is located in the second column forming area 2. The third guide hole punch corresponds to the third guide hole 100c and is located in the fifth column forming area 5.

[0033] like Figure 2As shown, the first forming module 100 is the first station where the strip enters the stamping process. At this time, the overall deformation of the strip is relatively small. The three guide hole punches are arranged on the outer sides of the second, fifth, and first columns, respectively. The guide holes are placed near the edge of the strip because the edge of the strip is most prone to warping and deviation during the stamping process. Prioritizing edge constraint can effectively control the overall shape of the strip. This layout of outer and middle sections forms three dispersed constraint points in the width direction of the strip, which can effectively limit the lateral movement and longitudinal offset of the strip.

[0034] The basic positioning of the strip is achieved by using a small number of guide points in the preceding station. The distributed layout of the outer and middle parts takes into account both structural simplicity and positioning effectiveness. The key positions in the width direction of the strip are covered with the fewest number of guide holes, reducing the area occupied by small hole punching on the strip.

[0035] like Figure 2 As shown, in the first forming module 100, the first guide hole punch (corresponding to the first guide hole 100a) located outside the first column forming area 1 and the second guide hole punch (corresponding to the second guide hole 100b) located in the second column forming area 2 are positioned in the material conveying direction at the adjacent row spacing in front of the forming position corresponding to the pre-punching station of the first forming module 100. The third guide hole punch (corresponding to the third guide hole 100c) corresponding to the fifth column forming area 5 is located in the same row as the forming position corresponding to the pre-punching station of the first forming module 100 in the material conveying direction.

[0036] The three guide hole punches are not arranged neatly in the conveying direction of the strip, but rather two are staggered in the same row as the previous one. This staggered arrangement causes the strip to be constrained by the guide pins, with different columns forming staggered constraint points in the longitudinal direction, effectively resisting the stretching and deformation of the strip in the longitudinal direction.

[0037] The first two guide holes are located at adjacent row spacings in front of the pre-punching station, meaning that the strip material in these areas is pre-positioned before reaching the pre-punching position. The guide holes in the fifth row are parallel to the pre-punching station, and are positioned simultaneously with the punching of the center hole. This staged positioning method gradually and completely constrains the strip material, avoiding local stress concentration caused by multi-point positioning at one time, reducing potential local deformation when the strip material is guided at multiple points simultaneously, and protecting the flatness of the strip material.

[0038] like Figure 3As shown, two of the three guide hole punches configured on the second forming module 200 correspond to the second column forming area 2 and the fourth column forming area 4, respectively, and the other guide hole punch is located outside the fifth column forming area 5. That is, the three guide hole punches configured on the first forming module 100 include guide hole punch No. 4, guide hole punch No. 5, and guide hole punch No. 6. Guide hole punch No. 4 corresponds to guide hole 200a located in the second column forming area 2, guide hole punch No. 5 corresponds to guide hole 200b located in the fourth column forming area 4, and guide hole punch No. 6 corresponds to guide hole 200c located outside the fifth column forming area 5.

[0039] After the first forming module 100 completes the blanking process, the position of the first forming area 1 is occupied by the blanking process. That is, this area has been stamped to form a blank outline, making it impossible to open a guide hole at this position, and it cannot serve as an effective positioning reference for subsequent stations. Therefore, the layout of the guide holes in the second forming module 200 must be adaptively adjusted. The guide reference dynamically shifts with the blanking process, ensuring that the positioning of each station does not depend on the destroyed area, effectively cutting off the error transmission chain of the positioning reference.

[0040] Furthermore, after the strip has undergone multiple punching operations by the first forming module, the internal stress of the sheet metal has been partially released, resulting in initial stretching and lateral deformation of the strip. The second forming module 200 adjusts the layout of the guide holes to the outer sides of the second, fourth, and fifth columns, forming three dispersed and effective constraint points in the width direction of the strip. This corrects and positions the strip that has undergone initial deformation, maintaining its guiding capability while ensuring the simplicity of the mold structure.

[0041] like Figure 3 As shown, the three guide hole punches configured on the second forming module 200 are all located in the adjacent row spacing in front of the forming position corresponding to the second pre-punching station 201 of the second forming module 200 in the strip conveying direction. After the strip has been punched multiple times by the first forming module, the first column forming area 1 of the strip entering this position has been punched through and damaged, the internal stress of the strip has been partially released, and preliminary deformation has occurred. In this state, if the staggered guiding strategy of the first forming module 100 is used, the sequential intervention of each guiding point will cause the strip to bear uneven constraint force on the weakened structure, which will aggravate the local deformation. The row layout of three holes proceeding simultaneously allows the three guide holes to intervene simultaneously before the strip reaches the pre-punching station. The three dispersed constraint points work together at the same time to form an instantaneous, uniform, and comprehensive constraint force system in the strip width direction, avoiding insufficient local constraint or uneven force due to hole position adjustment.

[0042] like Figure 4 As shown, the four guide hole punches on the third forming module 300 are: No. 7 guide hole punch, No. 8 guide hole punch, No. 9 guide hole punch, and No. 10 guide hole punch.

[0043] The No. 10 guide hole punch corresponds to the No. 10 guide hole 300d and is located outside the fifth column forming area 5; the No. 7 guide hole punch corresponds to the No. 7 guide hole 300a and is located outside the first column forming area 1; the No. 9 guide hole punch corresponds to the No. 9 guide hole 300c and is located in the third column forming area 3; the No. 8 guide hole punch is located in the middle position between the No. 7 guide hole punch and the No. 9 guide hole punch in the direction perpendicular to the material conveying direction, that is, the No. 8 guide hole 300b is located between the No. 7 guide hole 300a and the No. 9 guide hole 300c in the direction perpendicular to the material conveying direction.

[0044] Compared to the three guide holes in the first two groups, the third forming module 300 includes four guide holes, increasing the guide capability from three to four holes, which matches the actual needs of the material strip with increased deformation in the middle section.

[0045] It should be noted that the third forming module 300 corresponds to the second column forming area 2, which is close to the first column forming area 1. After the strip passes through the first forming module, the first column forming area 1 is punched through and damaged, becoming a "weak zone" in the width direction of the strip. After the material in this area is removed, the adjacent second column forming area 2 will experience uneven stress release from one side during subsequent punching. To address this specific characteristic, the third forming module 300 arranges two guide holes on the side where the second column forming area 2 is located: one is located outside the first column forming area 1, namely guide hole 300a (number seven), and the other is located in the middle position between the guide hole outside the first column forming area 1 and the second column forming area 2, namely guide hole 300b (number eight). These two guide holes form a double constraint barrier on the left side of the second column forming area 2, effectively suppressing the stress concentration caused by the punching of the first column from being transmitted to the second column. This clamping arrangement provides the second column forming area 2 with dual positioning support from its side closest to the first column forming area 1 during punching, effectively compensating for the structural support lost due to the punching of the first column, and ensuring that the punching profile accuracy of the second column core is not affected by the punching of adjacent columns.

[0046] In addition to the double-point reinforcement on the left, the No. 9 guide hole 300c and the No. 10 guide hole 300d provide constraints in the center and right side of the strip, respectively. This makes the four guide holes form a composite constraint network in the width direction of the strip, with double-point reinforcement on the left, single-point support in the middle, and single-point positioning on the right. This asymmetric constraint tilts the guiding resources towards the area with the most severe deformation, achieving precise deployment of guiding capabilities. It achieves the maximum positioning efficiency with fewer guide holes, ensuring the overall positioning stability of the strip while focusing on reinforcing the left side area with the most severe deformation.

[0047] like Figure 4As shown, among the four guide hole punches on the third forming module 300, the guide hole punch corresponding to the third column forming area 3 is located in the material conveying direction at the adjacent row spacing in front of the forming position corresponding to the pre-punching station of the third forming module 300. The other three guide hole punches are all located in the same row of the forming position corresponding to the pre-punching station of the third forming module 300 in the material conveying direction. That is to say, the two guide holes No. 7 300a and No. 8 300b are in the same row in terms of row position, which means that they are inserted into the position and take effect at the same time before punching at the pre-punching station, forming an instantaneous and balanced two-point clamping force. This synchronicity avoids the local twisting of the material strip that may occur when the two guide holes intervene one after the other, ensuring the consistency and stability of the constraint force on the weak side.

[0048] The sequential design, with the central section moving first and the two sides moving simultaneously, creates a progressive constraint on the strip in the width direction: the central section stabilizes first, and the weaker sides are strengthened later. After the central guide hole establishes the benchmark one row ahead, the other three holes take effect simultaneously in the row where the pre-punching station is located. At this time, the double-point clamping force on the weak side works in conjunction with the central benchmark to effectively resist the asymmetric stress impact caused by the punching through the first row.

[0049] like Figure 5 As shown, the four guide hole punches provided on the fourth forming module 400 include guide hole punch No. 11, guide hole punch No. 12, guide hole punch No. 13, and guide hole punch No. 14. They correspond to guide hole No. 11 400a, guide hole No. 12 400b, guide hole No. 13 400c, and guide hole No. 14 400d, respectively.

[0050] The arrangement of the four guide hole punches on the fourth forming module 400 is opposite to that on the third forming module 300, in a direction perpendicular to the conveying direction of the material strip. Furthermore, the row arrangement of the guide hole punches on both forming modules is the same. The principle behind this arrangement is the same as that of the third forming module 300.

[0051] like Figure 6 As shown, the six guide hole punches provided on the fifth forming module 500 include guide hole punch No. 15, guide hole punch No. 16, guide hole punch No. 17, guide hole punch No. 18, guide hole punch No. 19, and guide hole punch No. 20. They correspond to guide hole No. 15 500a, guide hole No. 16 500b, guide hole No. 17 500c, guide hole No. 18 500d, guide hole No. 19 500e, and guide hole No. 20 500f, respectively.

[0052] The No. 20 guide hole punch corresponds to the No. 20 guide hole 500f and is located outside the fifth column forming area 5. The No. 15 guide hole punch corresponds to the No. 15 guide hole 500a and is located outside the first column forming area 1. The No. 16 guide hole 500b and the No. 17 guide hole 500c are located on both sides of the second column forming area 2 in a direction perpendicular to the conveying direction of the material belt and are located between the first column forming area 1 and the third column forming area 3. The No. 18 guide hole 500d and the No. 19 guide hole 500e are located on both sides of the fourth column forming area 4 in a direction perpendicular to the conveying direction of the material belt and are located between the fifth column forming area 5 and the third column forming area 3.

[0053] like Figure 6 As shown, among the six guide hole punches provided on the fifth forming module 500, the two outer guide hole punches are located in the material conveying direction at the adjacent row spacing in front of the forming position corresponding to the pre-punching station of the fifth forming module 500. The remaining four middle guide hole punches are all located in the same row of the forming position corresponding to the pre-punching station of the fifth forming module 500 in the material conveying direction.

[0054] like Figure 1 As shown, after the strip is punched through the first four forming modules, the first, second, fourth and fifth columns of forming are all punched through and destroyed. Only the third column forming area 3 in the width direction of the strip is still to be finally formed. The remaining areas are mostly connecting ribs or bridging parts left after punching. The overall rigidity of the strip has been greatly reduced, and the connecting ribs between the columns have become the only channel for transmitting positioning force.

[0055] The six guide holes are laid out within these remaining effective areas—two are located at the two edges of the strip, namely the outer sides of the first and fifth columns, and four are located on the remaining connecting bridging strips after each column has been punched, namely the two sides of the second and fourth columns. This allows for multi-point positioning without increasing the area occupied by the strip, constraining and forcing the strip that has undergone hollow extension deformation to return to its original position, offsetting all accumulated deformation errors, and ensuring the consistency of the blanking profile and rotary stacking reference dimensions of the only unpunched third column core.

[0056] Among them, guide holes 500b (number 16) and 500c (number 17) are located on the remaining connecting ribs on both sides of the second forming area 2, i.e., between the first and second columns and between the second and third columns. Guide holes 500d (number 18) and 500e (number 19) are located on both sides of the fourth forming area 4, i.e., between the third and fourth columns and between the fourth and fifth columns. This "paired clamping" layout utilizes the remaining bridging parts after punching to set guide holes, forming a pair of clamping constraint points on each of the left and right sides of the third forming area 3. This ensures that the remaining third forming area 3 is tightly clamped by the double-sided guide pins in the width direction, ensuring that it is in a precise positioning state before final unloading. The guide holes on the outer sides of the first and fifth columns are located in the complete area of ​​the two edges of the strip. These two edge holes, together with the four holes in the middle, form a full-area constraint network of outer edge limiting bridging band clamping in the width direction of the strip, forcibly returning the severely deformed strip to its original position.

[0057] like Figure 1-6 As shown, each forming module includes, in sequence, a rotor slot punching station, a central stepped hole punching station, a rotor counting punching station, a rotor stacking and riveting punching station, a rotor shaft hole punching station, an idle step station, and a rotor blanking station after the pre-punching station.

[0058] The first forming module 100 has a rotor slot punching station 102, a central stepped hole punching station 103, a rotor counting punching station 104, a rotor stacking and riveting punching station 105, a rotor shaft hole punching station 106, an idle step station 107, and a rotor blanking station 108. And so on, which will not be described in detail here.

[0059] After the pre-punching of the center hole, the strip sequentially passes through rotor slot punching, central stepped hole punching, rotor counting punching, rotor riveting punching, rotor shaft hole punching, idle step station, and rotor blanking station. Specifically, the rotor slot punching process forms the rotor slots at the slot locations; the central stepped hole punching process forms a stepped center hole structure; the rotor counting punching process punches marks or holes for counting; the rotor riveting punching process punches riveting points so that the stamped pieces can interlock and be fixed during subsequent stacking; the rotor shaft hole punching process punches the final shaft hole; and the rotor blanking station removes the formed rotor stamped pieces from the strip. This series of stations is arranged sequentially according to the logical order of the stamping process, completing all processing steps from the center hole to the final blanking.

[0060] It should be noted that the idle station does not perform punching. Its functions are: first, to provide a blanking-free stroke for the strip, allowing residual stress generated by previous punching to be released naturally; second, to provide operating space for mold maintenance and adjustment; and third, to buffer the impact force during high-speed stamping, protecting the mold.

[0061] From pre-punching to final blanking, each station is arranged in a progressive order of first the datum and then the profile, first roughing and then finishing, to ensure that each process is further processed on the basis of the previous process, and finally completes the forming of the rotor lamination in one go.

[0062] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0063] The foregoing has provided a detailed description of the five-row rotary core lamination die layout with a graded, incremental guide hole arrangement provided by the present invention. Specific examples have been used to illustrate the principles and implementation methods of the invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the invention and its core ideas. It should be noted that those skilled in the art can make various improvements and modifications to the invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A five-row rotary core lamination die layout with a graded, incremental guide hole arrangement, characterized in that, It includes five forming modules arranged sequentially along the conveyor belt direction: the first forming module, the second forming module, the third forming module, the fourth forming module, and the fifth forming module. Each of the forming modules includes multiple stamping stations arranged sequentially along the conveying direction of the material belt; Each of the five forming modules defines five columns of forming areas extending side by side along the length of the material conveyor track, and multiple rows of forming positions distributed in a staggered manner along the width of the track. The center of each of the five forming modules is aligned with the center of each forming position in the corresponding forming area. The first molding module and the second molding module are respectively arranged in the first column molding area and the fifth column molding area; The third molding module and the fourth molding module are respectively arranged in the second molding area and the fourth molding area; The fifth molding module is arranged in the third molding area, i.e. the middle molding area; The first forming module and the second forming module each have three guide hole punches in a direction perpendicular to the conveying direction of the material belt; the fourth forming module has four guide hole punches in a direction perpendicular to the conveying direction of the material belt; and the fifth forming module has six guide hole punches in a direction perpendicular to the conveying direction of the material belt.

2. The five-column rotary core lamination die layout with graded incremental guide hole arrangement according to claim 1, characterized in that, The first stamping station in each forming module is a pre-punching station, used to pre-punch the center hole of the iron core on the strip; each of the guide hole punches is located before the pre-punching station of the corresponding forming module in the strip conveying direction.

3. The five-column rotary core lamination die layout with graded incremental guide hole arrangement according to claim 2, characterized in that, Two of the three guide hole punches configured on the first forming module correspond to the second column forming area and the fifth column forming area, respectively, and the other guide hole punch is located outside the first column forming area.

4. The five-column rotary core lamination die layout with graded incremental guide hole arrangement according to claim 3, characterized in that, In the first forming module, the two guide hole punches located outside the first column forming area and corresponding to the second column forming area are located in the material conveying direction at adjacent row spacing in front of the forming position corresponding to the pre-punching station of the first forming module; the guide hole punch corresponding to the fifth column forming area is located in the same row of the forming position corresponding to the pre-punching station of the first forming module in the material conveying direction.

5. The five-column rotary core lamination die layout with graded incremental guide hole arrangement according to claim 2, characterized in that, Two of the three guide hole punches configured on the second forming module correspond to the second column forming area and the fourth column forming area, respectively, and the other guide hole punch is located outside the fifth column forming area.

6. The five-column rotary core lamination die layout with graded incremental guide hole arrangement according to claim 5, characterized in that, The three guide hole punches configured on the second forming module are all located in the direction of conveying the material strip at the adjacent row distance in front of the forming position corresponding to the pre-punching station of the second forming module.

7. The five-column rotary core lamination die layout with graded incremental guide hole arrangement according to claim 2, characterized in that, Of the four guide hole punches provided on the third forming module, the first guide hole punch corresponds to the outer side of the fifth column forming area, the second guide hole punch corresponds to the outer side of the first column forming area, the third guide hole punch corresponds to the third column forming area, and the fourth guide hole punch is located at the middle position between the guide hole punch outside the first column forming area and the second column forming area in a direction perpendicular to the material conveying direction.

8. The five-column rotary core lamination die layout with graded incremental guide hole arrangement according to claim 7, characterized in that, Of the four guide hole punches provided on the third forming module, the guide hole punch corresponding to the third column forming area is located in the material conveying direction at the adjacent row distance in front of the forming position corresponding to the pre-punching station of the third forming module; the other three guide hole punches are all located in the same row of the forming position corresponding to the pre-punching station of the third forming module in the material conveying direction.

9. The five-row rotary core lamination die layout with graded incremental guide hole arrangement according to claim 2, characterized in that, The arrangement of the four guide hole punches on the fourth forming module is opposite to that of the four guide hole punches on the third forming module, which are arranged in a direction perpendicular to the conveying direction of the material strip; and the row arrangement of each guide hole punch on both forming modules is the same.

10. A five-column rotary core lamination die layout with a graded incremental guide hole arrangement according to claim 2, characterized in that, Of the six guide hole punches provided on the fifth forming module, the first guide hole punch corresponds to the outer side of the fifth column forming area, the second guide hole punch corresponds to the outer side of the first column forming area, the third and fourth guide hole punches are located on both sides of the second column forming area and between the first column forming area and the third column forming area in a direction perpendicular to the material conveying direction, and the fifth and sixth guide hole punches are located on both sides of the fourth column forming area and between the fifth column forming area and the third column forming area in a direction perpendicular to the material conveying direction.

11. The five-column rotary core lamination die layout with graded incremental guide hole arrangement according to claim 10, characterized in that, Of the six guide hole punches provided on the fifth forming module, the two outer guide hole punches are located in the material conveying direction at the adjacent row spacing in front of the forming position corresponding to the pre-punching station of the fifth forming module; the remaining four guide hole punches in the middle are all located in the same row of the forming position corresponding to the pre-punching station of the fifth forming module in the material conveying direction.

12. The five-column rotary core lamination die layout with graded incremental guide hole arrangement according to claim 2, characterized in that, Each of the forming modules includes, in sequence after the pre-punching station, a rotor slot punching station, a central stepped hole punching station, a rotor counting punching station, a rotor stacking and riveting punching station, a rotor shaft hole punching station, a step-free station, and a rotor blanking station.

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