Motor iron core splicing die combined stamping process and stamping die

Abstract

The invention discloses a motor iron core splicing block die combination stamping process. The process comprises the following steps: S1, ensuring that the width of a material belt corresponds to the sum of the widths of a plurality of splicing blocks required by a single stator iron core sheet; s2, the positions, located between all the splicing blocks in the same row, of the material belt are punched, arc-shaped protruding parts and arc-shaped grooves are formed, and the arc-shaped protruding parts are connected into the arc-shaped grooves in an embedded mode; s3, all the splicing blocks in the same row of the material belt are subjected to punch forming, and all the splicing blocks in the same row are synchronously punched off from the material belt; and S4, bending the punched-off strip-shaped connected splicing blocks into a ring shape, embedding the arc-shaped convex part of the splicing block at the head end and the arc-shaped groove of the splicing block at the tail end, then welding, and finally obtaining a stator iron core sheet finished product. According to the scheme, the production efficiency is effectively improved, the assembly difficulty is reduced, and meanwhile, the quality of the stator iron core sheet is improved due to the reduction of the number of the welding spots. The invention further provides a motor iron core splicing die combined stamping die.

Description

Technical Field

[0001] This invention relates to the technical field of mold processing, and more specifically to a stamping process for assembling motor core blocks, and a stamping die for assembling motor core blocks. Background Technology

[0002] The stator core is an important component of an electric motor, and it is usually made of stacked ring-shaped silicon steel sheets. For ease of manufacturing and assembly, stator core sheets are often assembled from multiple arc-shaped blocks.

[0003] In existing production processes, multiple independent stator iron core blocks are typically stamped onto a strip using a stamping die. Each block has an arc-shaped protrusion on one side and a matching arc-shaped groove on the opposite side. During assembly, operators, either manually or with the aid of equipment, insert the arc-shaped protrusions of adjacent blocks one by one into the arc-shaped grooves of another block, thus connecting the multiple blocks end to end to form a complete ring-shaped stator iron core.

[0004] However, in this traditional production process, each component is an independent unit, requiring individual alignment and fitting operations when assembling them into a ring. This not only demands a high level of operator skill but is also complex, severely limiting the production efficiency of stator iron chips and making it difficult to meet the demands of modern large-scale production. Furthermore, to ensure assembly feasibility, a large assembly gap must be designed between the arc-shaped protrusions and arc-shaped grooves. This results in adjacent components being loose after being assembled into a ring. Therefore, existing technologies typically require spot welding to fix the connection between each arc-shaped protrusion and arc-shaped groove after assembly. This welding step not only further increases production steps and time, reducing production efficiency, but the presence of weld points can also degrade the magnetic circuit performance of the stator iron chip, such as increasing iron loss and affecting the uniformity of magnetic permeability. Summary of the Invention

[0005] The purpose of this invention is to solve the problems of low production efficiency, complex assembly, and deterioration of magnetic circuit performance of stator iron chips caused by a large number of solder joints when the existing process for processing stator iron chips is to process the blocks independently first and then splice and spot weld them together.

[0006] To solve the above problems, the present invention provides a stamping process for assembling motor core blocks, comprising the following steps: S1. Configure the strip to ensure that the width of the strip corresponds to the sum of the widths of the multiple pieces required for a single stator iron chip; S2. Punch cut the material strip between all the blocks in the same row, so that one side of any two adjacent blocks forms an arc-shaped protrusion and the other side forms an arc-shaped groove, and the arc-shaped protrusion is embedded in the arc-shaped groove; at the same time, punch cut an arc-shaped protrusion on the side of the block at the beginning of the row that is away from the adjacent block, and punch cut an arc-shaped groove on the side of the block at the end of the row that is away from the adjacent block. S3. All the blocks in the same row of the strip are stamped and formed, and all the blocks in the same row are simultaneously punched off the strip. At this time, due to the interlocking effect of the arc-shaped protrusions and arc-shaped grooves of the adjacent blocks, all the blocks in the same row are connected in sequence to form a strip. S4. The strip-shaped connecting pieces that have been knocked off are bent into a ring shape, and the arc-shaped protrusion of the first piece is first inserted into the arc-shaped groove of the last piece and then welded, so as to obtain the finished stator iron chip.

[0007] Compared with existing technologies, the above solution improves the process. First, in step S2, the arc-shaped protrusions of the adjacent blocks of the strip are embedded in the corresponding arc-shaped grooves. Then, in step S3, all the adjacent blocks of the strip are stamped and simultaneously punched out, resulting in strip-shaped blocks connected sequentially. Finally, the arc-shaped protrusions of the first block and the arc-shaped grooves of the last block are first embedded and then welded to obtain the finished stator iron chip. Compared with existing technologies, this solution not only eliminates the assembly process of assembling the blocks one by one, but also only requires spot welding of the arc-shaped protrusions and grooves of the first and last blocks, greatly reducing the number of welding points. This not only effectively improves production efficiency and reduces assembly difficulty, but also improves the quality of the stator iron chip due to the reduction in the number of welding points.

[0008] As an improvement, in step S2, the punching of the strip is achieved by a trimming module, which includes an upper punch and a lower die arranged vertically. The shape of the upper punch corresponds to the arc-shaped protrusion. The lower die is provided with a push rod and a spring for pushing the push rod upward. The push rod corresponds to the position of the arc-shaped protrusion. The upper punch punches downward so that the corresponding position of the strip forms a downwardly bent arc-shaped protrusion and a corresponding arc-shaped groove. Then, when the upper punch rises and resets, the push rod pushes the arc-shaped protrusion upward under the action of the spring and inserts it into the corresponding arc-shaped groove, thereby realizing the function of punching the arc-shaped protrusion and re-inserting the punched arc-shaped protrusion into the corresponding arc-shaped groove.

[0009] As an improvement, in step S2, clearance grooves are first punched out at the front and rear of the strip between all adjacent blocks in the same row, and then arc-shaped protrusions and arc-shaped grooves are punched out. The arc-shaped protrusions and arc-shaped grooves correspond to the middle position of the side of the block. By punching clearance grooves at the front and rear of the strip between all adjacent blocks in the same row through the pre-punching module, it is beneficial to bend the strip-connected blocks in the subsequent step S4.

[0010] As an improvement, in step S1, positioning holes are first punched out on the strip, and then step S2 is performed. This allows positioning holes to be pre-punched out on the strip using a punching die, which facilitates accurate positioning of the strip in the future.

[0011] This invention also provides a stamping die for a motor core assembly, including a trimming module. The trimming module includes an upper die base, a stripper plate, and a lower die base arranged from top to bottom. A feeding area for the strip material is provided between the stripper plate and the lower die base. The upper die base is vertically adjustable and has downward-facing upper punches. The number of upper punches corresponds to the number of adjacent blocks in the same row of the strip material, and the position of the upper punches corresponds to the same side of the adjacent blocks in the same row of the strip material. The stripper plate is vertically adjustable and has stripping holes through which the upper punches can pass one by one. The lower die base is fixedly installed and has a lower die located below the upper punch. The number and position of the lower dies correspond one by one with the upper punches. The lower die has a guide hole opened vertically. A push rod and a spring for applying an upward pushing force to the push rod are slidably inserted in the guide hole. The upper punch is used to punch downward so that the corresponding position of the strip forms a downwardly bent arc-shaped protrusion and a corresponding arc-shaped groove. When the upper punch rises and resets, the push rod pushes the arc-shaped protrusion upward under the action of the spring and inserts it into the corresponding arc-shaped groove.

[0012] The above solution designs the lower die base so that when the upper die base descends for punching, the upper punch first descends, causing its lower end to extend below the unloading hole. Then, as the upper die base continues to descend, the upper punch, in conjunction with the lower die, punches the strip. At this time, the ejector pin descends due to the thrust of the upper punch, and the spring is compressed. After the corresponding position of the strip is punched with a downward-bending arc-shaped protrusion and a corresponding arc-shaped groove, the upper die rises and resets, the lower end of the upper punch retracts into the unloading hole, and the spring extends and pushes the ejector pin upward. The ejector pin then pushes the arc-shaped protrusion upward and into the corresponding arc-shaped groove, thus achieving the function of punching an arc-shaped protrusion at the corresponding position of the strip and keeping the punched arc-shaped protrusion embedded in the corresponding arc-shaped groove.

[0013] As an improvement, a blanking module is also included. The trimming module and the blanking module are arranged one after the other. The blanking module includes a liftable upper blanking die and a fixed lower blanking die. The upper blanking die is used to press downward so that the adjacent blocks of the strip are stamped and simultaneously dropped to the lower blanking die. Thus, the upper blanking die and the lower blanking die of the blanking module realize the stamping and simultaneous dropping of adjacent blocks.

[0014] As an improvement, a pre-punching module is also included, located in front of the trimming module. The pre-punching module includes a liftable upper pre-punching die and a fixed lower pre-punching die. The upper pre-punching die is used to punch downwards to punch clearance grooves at the front and rear of the strip between all adjacent blocks in the same row. The arc-shaped grooves and arc-shaped protrusions punched by the trimming module correspond to the middle position of the side of the block. Thus, the upper and lower pre-punching dies of the pre-punching module can punch clearance grooves at the front and rear of all adjacent blocks in the same row, which facilitates the subsequent bending of the strip-connected blocks. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the strip material corresponding to a stamping process for assembling motor core blocks; Figure 2 This is a schematic diagram of a strip-connected assembly block in a stamping process for assembling motor core assembly blocks; Figure 3 This is a schematic diagram of a strip-connected assembly block bending into a ring shape in a stamping process for assembling motor core blocks; Figure 4 A schematic diagram of a stamping process for assembling motor core modules; Figure 5 This is a schematic diagram of a stamping die for assembling motor core blocks.

[0016] Explanation of reference numerals in the attached figures. 1. Material strip; 11. Block; 12. Arc-shaped protrusion; 13. Arc-shaped groove; 14. Clearance groove; 15. Positioning hole; 2. Trimming module; 21. Upper mold base; 211. Upper punch; 22. Stripper plate; 221. Stripper hole; 23. Lower mold base; 231. Lower die; 232. Ejector rod; 233. Spring; 3. Blanking module; 31. Upper blanking die; 32. Lower blanking die. Detailed Implementation

[0017] It should be understood by those skilled in the art that the following embodiments are merely illustrative of the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0018] In the following description of the embodiments, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0019] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0020] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Example 1: Please refer to Figures 1-4 Embodiment 1 of the present invention provides a stamping process for assembling motor core blocks, comprising the following steps: S1. Configure strip 1 to ensure that the width of strip 1 corresponds to the sum of the widths of multiple blocks 11 required for a single stator iron chip; S2. Punch cut the position of all the blocks 11 in the same row of the material strip 1, so that the side of one of any two adjacent blocks 11 forms an arc-shaped protrusion 12 and the side of the other forms an arc-shaped groove 13, and the arc-shaped protrusion 12 is embedded in the arc-shaped groove 13; at the same time, punch cut the arc-shaped protrusion 12 on the side of the block 11 at the beginning of the row that is away from the adjacent block 11, and punch cut the arc-shaped groove 13 on the side of the block 11 at the end of the row that is away from the adjacent block 11. S3. All the blocks 11 in the same row of the strip 1 are stamped and formed, and all the blocks 11 in the same row are simultaneously punched off the strip 1. At this time, due to the interlocking effect of the arc-shaped protrusions 12 and arc-shaped grooves 13 of the adjacent blocks 11, all the blocks 11 in the same row are connected in sequence to form a strip. S4. The strip-shaped connecting pieces 11 that have been washed away are bent into a ring shape, and the arc-shaped protrusion 12 of the first piece 11 and the arc-shaped groove 13 of the last piece 11 are first inserted and then welded to obtain the finished stator iron chip.

[0022] Compared with the prior art, the above solution improves the process. First, in step S2, the arc-shaped protrusions 12 of the adjacent blocks 11 of the strip 1 are kept embedded in the corresponding arc-shaped grooves 13. Then, in step S3, all the adjacent blocks 11 of the strip 1 are stamped and simultaneously punched out, thus obtaining a strip-shaped block 11 connected in sequence. Finally, the arc-shaped protrusions 12 of the first block 11 and the arc-shaped grooves 13 of the last block 11 are first embedded and then welded to obtain the finished stator iron chip. Compared with the prior art, it not only saves the assembly process of assembling the blocks 11 one by one, but also only requires spot welding to fix the arc-shaped protrusions 12 and arc-shaped grooves 13 of the first and last blocks 11, which greatly reduces the number of welding points. This not only effectively improves production efficiency and reduces assembly difficulty, but also improves the quality of the stator iron chip due to the reduction in the number of welding points.

[0023] In step S2, the punching of the strip 1 is achieved by the edge trimming module 2. The edge trimming module 2 includes an upper punch 211 and a lower die 231 arranged vertically. The shape of the upper punch 211 corresponds to the arc-shaped protrusion 12. The lower die 231 is provided with a push rod 232 and a spring 233 for pushing the push rod 232 upward. The push rod 232 corresponds to the position of the arc-shaped protrusion 12. The upper punch 211 punches downward so that the corresponding position of the strip 1 forms a downwardly bent arc-shaped protrusion 12 and a corresponding arc-shaped groove 13. Then, when the upper punch 211 rises and resets, the push rod 232 pushes the arc-shaped protrusion 12 upward under the action of the spring 233 and inserts it into the corresponding arc-shaped groove 13, thereby realizing the punching of the arc-shaped protrusion 12 and the function of re-inserting the punched arc-shaped protrusion 12 into the corresponding arc-shaped groove 13.

[0024] As an improvement to step S2, firstly, clearance grooves 14 are punched out at the front and rear of the material strip 1 between all adjacent blocks 11 in the same row. Then, arc-shaped protrusions 12 and arc-shaped grooves 13 are punched out. The arc-shaped protrusions 12 and arc-shaped grooves 13 correspond to the middle position of the side of the block 11. By punching clearance grooves 14 at the front and rear of the material strip between all adjacent blocks 11 in the same row through the pre-punching module, it is beneficial to bend the strip-connected blocks 11 in the subsequent step S4.

[0025] In addition, in step S1, positioning holes 15 are first punched out on the strip 1, and then step S2 is entered, so that positioning holes 15 are punched out on the strip 1 in advance by the punching die, which facilitates the accurate positioning of the strip 1 in the future.

[0026] Example 2: Please refer to Figures 1-5Embodiment 2 of the present invention provides a stamping die for a motor core assembly, including a trimming module 2. The trimming module 2 includes an upper die base 21, a stripper plate 22, and a lower die base 23 arranged from top to bottom. A feeding area for the material strip 1 to pass through is provided between the stripper plate 22 and the lower die base 23. The upper die base 21 is vertically adjustable and has downward-facing upper punches 211. The number of upper punches 211 corresponds to the number of adjacent assemblies 11 of the material strip 1, and the position of the upper punches 211 corresponds to the same side of the adjacent assemblies 11 of the material strip 1. The stripper plate 22 is vertically adjustable and has unloading holes 221 through which the upper punches 211 pass one by one. The lower die base 23 is fixedly installed and has a lower die 231 located below the upper punch 211. The number and position of the lower dies 231 correspond one by one with the upper punch 211. The lower die 231 has a guide hole opened vertically. A push rod 232 and a spring 233 for applying an upward pushing force to the push rod 232 are slidably inserted in the guide hole. The upper punch 211 is used to punch downward so that the corresponding position of the strip 1 forms a downwardly bent arc-shaped protrusion 12 and a corresponding arc-shaped groove 13. When the upper punch 211 rises and resets, the push rod 232 pushes the arc-shaped protrusion 12 upward under the action of the spring 233 and engages it in the corresponding arc-shaped groove 13.

[0027] The above solution involves designing the lower die holder 23 so that when the upper die holder 21 descends for punching, the upper punch 211 first descends, causing its lower end to extend below the unloading hole 221. Then, as the upper die holder 21 continues to descend, the upper punch 211, in conjunction with the lower die 231, punches the strip 1. At this time, the ejector pin 232 descends due to the thrust of the upper punch 211, and the spring 233 is compressed. When the corresponding position of the strip 1 is punched out and bent downwards... After the arc-shaped protrusion 12 and the corresponding arc-shaped groove 13 are formed, the upper mold rises and resets, the lower end of the upper punch 211 retracts into the unloading hole 221, and at the same time the spring 233 extends and pushes the push rod 232 upward. The push rod 232 then pushes the arc-shaped protrusion 12 upward and embeds it into the corresponding arc-shaped groove 13, thereby realizing the function of punching out the arc-shaped protrusion 12 at the corresponding position of the strip 1 and keeping the punched arc-shaped protrusion 12 embedded in the corresponding arc-shaped groove 13.

[0028] Furthermore, embodiment 2 of the present invention also includes a blanking module 3. The trimming module 2 and the blanking module 3 are arranged one after the other. The blanking module 3 includes a liftable upper blanking mold 31 and a fixed lower blanking mold 32. The upper blanking mold 31 is used to press downward so that the adjacent blocks 11 of the strip 1 are pressed and formed and synchronously pressed down to the lower blanking mold 32. Thus, the upper blanking mold 31 and the lower blanking mold 32 of the blanking module 3 realize the pressing and forming and synchronous pressing down of the adjacent blocks 11.

[0029] The principle of the upper blanking die 31 and the lower blanking die 32 stamping and punching out the blocks 11 in the same row is the same as the existing technology of stamping and punching out a single block 11. It belongs to the prior art and will not be described in detail here. That is, the shape of the mold in the prior art corresponds to the shape of a single block 11, while the shapes of the upper blanking die 31 and the lower blanking die 32 in this embodiment correspond to the shape of the entire row of blocks 11. Other structures are completely the same.

[0030] Furthermore, Embodiment 2 of the present invention also includes a pre-punching module, which is located in front of the trimming module 2. The pre-punching module includes a liftable upper pre-punching die and a fixed lower pre-punching die. The upper pre-punching die is used to punch downwards to punch clearance grooves 14 at the front and rear of the material strip 1 between all adjacent pieces 11 in the same row. The arc-shaped grooves 13 and arc-shaped protrusions 12 punched by the trimming module 2 correspond to the middle position of the side of the piece 11. Thus, the upper and lower pre-punching dies of the pre-punching module punch clearance grooves 14 at the front and rear of the positions between all adjacent pieces 11 in the same row, which facilitates the subsequent bending of the strip-connected pieces 11. The method of punching clearance grooves 14 on the material strip 1 by the upper pre-punching die and the lower pre-punching die is prior art and will not be described in detail here.

[0031] Example 3: Please refer to Figures 1-5 Embodiment 3 of the present invention provides a stamping process for assembling motor core blocks, comprising the following steps: S1. Configure the strip 1 to ensure that the width of the strip 1 corresponds to the sum of the widths of the multiple blocks 11 required for a single stator iron chip, and then send the strip 1 to the stamping die, the stamping die including the cutting module 2 and the blanking module 3 arranged sequentially; S2. The cutting module 2 punches the position of all the blocks 11 in the same row of the strip 1, so that the side of one of any two adjacent blocks 11 forms an arc-shaped protrusion 12 and the side of the other forms an arc-shaped groove 13, and the arc-shaped protrusion 12 is embedded in the arc-shaped groove 13; at the same time, the cutting module 2 punches the arc-shaped protrusion 12 on the side of the block 11 at the beginning of the row that is away from the adjacent block 11, and punches the arc-shaped groove 13 on the side of the block 11 at the end of the row that is away from the adjacent block 11. S3. The blanking module 3 stamps the strip 1 after passing through the trimming module 2, so that all the blocks 11 in the same row are stamped and simultaneously punched off the strip 1. Due to the interlocking effect of the arc-shaped protrusions 12 and arc-shaped grooves 13 of the adjacent blocks 11, all the blocks 11 in the same row are connected in sequence to form a strip. S4. The strip-shaped connecting pieces 11 that have been washed away are bent into a ring shape, and the arc-shaped protrusion 12 of the first piece 11 and the arc-shaped groove 13 of the last piece 11 are first inserted and then welded to obtain the finished stator iron chip.

[0032] Compared with the prior art, the above solution improves the process. In step S2, the arc-shaped protrusions 12 of the adjacent blocks 11 of the strip 1 are kept embedded in the corresponding arc-shaped grooves 13. Then, in step S3, all the adjacent blocks 11 of the strip 1 are stamped and simultaneously punched out, so that the blocks 11 are connected in sequence to form a strip. Finally, the arc-shaped protrusions 12 of the first block 11 and the arc-shaped grooves 13 of the last block 11 are first embedded and then welded to obtain the finished stator iron chip. Compared with the prior art, it not only saves the assembly process of assembling the blocks 11 one by one, but also only requires spot welding to fix the arc-shaped protrusions 12 and arc-shaped grooves 13 of the first and last blocks 11, which greatly reduces the number of welding points. This not only effectively improves production efficiency and reduces assembly difficulty, but also improves the quality of the stator iron chip due to the reduction in the number of welding points.

[0033] It should be noted that in the description of this application, the terms "inner" and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application. All directional indications (such as up, down, left, right, front, back, inner, and outer) are only used to explain the relative positional relationships and movement between components in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0034] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0035] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A stamping process for assembling motor core blocks, characterized in that, Includes the following steps: S1. Configure the strip (1) to ensure that the width of the strip (1) corresponds to the sum of the widths of the multiple blocks (11) required for a single stator iron chip; S2. Punch cut the material strip (1) between all the blocks (11) in the same row, so that one of any two adjacent blocks (11) forms an arc-shaped protrusion (12) on its side and the other forms an arc-shaped groove (13) on its side, and the arc-shaped protrusion (12) is embedded in the arc-shaped groove (13); at the same time, punch cut an arc-shaped protrusion (12) on the side of the block (11) at the beginning of the row that is away from the adjacent block (11), and punch cut an arc-shaped groove (13) on the side of the block (11) at the end of the row that is away from the adjacent block (11). S3. All the blocks (11) in the same row of the strip (1) are stamped and formed, and all the blocks (11) in the same row are simultaneously punched off the strip (1). At this time, due to the interlocking effect of the arc protrusion (12) and arc groove (13) of the adjacent blocks (11), all the blocks (11) in the same row are connected in sequence to form a strip. S4. The strip-connected pieces (11) that have been washed away are bent into a ring shape, and the arc-shaped protrusion (12) of the first piece (11) and the arc-shaped groove (13) of the last piece (11) are first inserted and then welded, so that the stator iron chip product can be obtained.

2. The stamping process for combining motor core blocks according to claim 1, characterized in that, In step S2, the punching of the strip (1) is achieved by the cutting module (2). The cutting module (2) includes an upper punch (211) and a lower die (231) arranged vertically. The shape of the upper punch (211) corresponds to the arc-shaped protrusion (12). The lower die (231) is provided with a push rod (232) and a spring (233) for pushing the push rod (232) upward. The push rod (232) corresponds to the position of the arc-shaped protrusion (12). The upper punch (211) punches downward so that the corresponding position of the strip (1) forms a downwardly bent arc-shaped protrusion (12) and a corresponding arc-shaped groove (13). Then, when the upper punch (211) rises and resets, the push rod (232) pushes the arc-shaped protrusion (12) upward under the action of the spring (233) and fits into the corresponding arc-shaped groove (13).

3. The stamping process for combining motor core blocks according to claim 1, characterized in that, In step S2, firstly, clearance grooves (14) are punched out at the front and rear of the material strip (1) between all adjacent blocks (11) in the same row, and then the arc-shaped protrusions (12) and arc-shaped grooves (13) are punched out, and the arc-shaped protrusions (12) and arc-shaped grooves (13) are both located at the middle position of the side of the block (11).

4. The stamping process for combining motor core blocks according to claim 1, characterized in that, In step S1, positioning holes (15) are first punched out on the strip (1), and then step S2 is performed.

5. A stamping die for combining motor core blocks, characterized in that, The device includes a trimming module (2), which comprises an upper mold base (21), a stripper plate (22), and a lower mold base (23) arranged from top to bottom. A feeding area is provided between the stripper plate (22) and the lower mold base (23) for the material strip (1) to pass through. The upper mold base (21) is vertically adjustable and has downward-facing upper punches (211). The number of upper punches (211) corresponds to the number of adjacent blocks (11) of the material strip (1), and the position of the upper punches (211) corresponds to the same side of the adjacent blocks (11) of the material strip (1). The stripper plate (22) is vertically adjustable and has unloading holes (221) through which the upper punches (211) pass one by one. The lower mold base (23) is fixedly installed and... A lower die (231) is provided below the upper punch (211). The number and position of the lower dies (231) correspond one by one with the upper punch (211). The lower die (231) is provided with a guide hole opened vertically. A push rod (232) and a spring (233) for applying an upward pushing force to the push rod (232) are slidably inserted in the guide hole. The upper punch (211) is used to punch downward so that the corresponding position of the strip (1) forms a downwardly bent arc-shaped protrusion (12) and a corresponding arc-shaped groove (13). When the upper punch (211) rises and resets, the push rod (232) pushes the arc-shaped protrusion (12) upward under the action of the spring (233) and fits into the corresponding arc-shaped groove (13).

6. The stamping die for combining motor core blocks according to claim 5, characterized in that, It also includes a blanking module (3), the trimming module (2) and the blanking module (3) are arranged in front and behind each other. The blanking module (3) includes an upper blanking module (31) that can be raised and lowered and a lower blanking module (32) that is fixedly arranged. The upper blanking module (31) is used to press downward so that the adjacent blocks (11) of the strip (1) are pressed into shape and simultaneously pressed down to the lower blanking module (32).

7. The stamping die for combining motor core blocks according to claim 6, characterized in that, It also includes a pre-punching module, which is located in front of the trimming module (2). The pre-punching module includes a liftable upper pre-punching die and a fixed lower pre-punching die. The upper pre-punching die is used to punch downward so that the front and rear parts of the strip (1) located between all adjacent blocks (11) in the same row are punched with clearance grooves (14). The arc grooves (13) and arc protrusions (12) punched by the trimming module (2) correspond to the middle position of the side of the block (11).

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