Automobile motor core and stamping forming method thereof

Abstract

The application discloses an automobile motor iron core and a stamping forming method thereof. The automobile motor iron core comprises a plurality of connecting magnetic steel sheets and a plurality of main magnetic steel sheets. The connecting magnetic steel sheets and the main magnetic steel sheets adopt a laminated design. A plurality of main magnetic steel sheets are arranged between two adjacent connecting magnetic steel sheets. The connecting magnetic steel sheet comprises a connecting center disc and a connecting ring. The connecting center disc and the connecting ring are connected through a plurality of connecting magnetic bridges. The main magnetic steel sheet comprises a main center disc and a plurality of main magnetic blocks. The stamping forming method comprises the following steps: feeding a strip material and fixing the strip material; blanking the connecting magnetic steel sheet; blanking the main magnetic steel sheet and laminating the main magnetic steel sheet on the connecting magnetic steel sheet; and repeating the forming processing of the automobile motor iron core. The application provides an automobile motor iron core and a stamping forming method thereof, which can reduce the weight of the motor iron core, reduce the rotating torque of the motor iron core, reduce the design of the magnetic bridge, and improve the saturated magnetic induction intensity.

Description

Technical Field

[0001] This invention relates to the field of motor core manufacturing, specifically to an automotive motor core and its stamping method. Background Technology

[0002] With the continuous advancement of scientific research and technology, the requirements for motors used in automobiles are becoming increasingly stringent, and the requirements for motor cores are also becoming increasingly stringent. In order to ensure the stability of motor cores, traditional motor cores often use uniform magnetic steel sheets stacked together. After stacking, the motor core has problems such as thick walls leading to large torque and multiple magnetic bridges leading to low saturation magnetic induction intensity, resulting in low cost-effectiveness of motor cores. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an automotive motor core and its stamping method for reducing the weight of the motor core, thereby reducing the torque driving the motor core, reducing the design of the magnetic bridge, and improving the saturation magnetic induction intensity.

[0004] The technical solution adopted by the present invention to solve the above problems is as follows: an automotive motor core, comprising multiple connecting magnet sheets and multiple main magnet sheets, wherein the multiple connecting magnet sheets and the multiple main magnet sheets are stacked, and multiple main magnet sheets are provided between two adjacent connecting magnet sheets. Each connecting magnet sheet includes a connecting center disk and a connecting ring, and the connecting center disk and the connecting ring are connected by multiple connecting magnetic bridges, which are evenly distributed in an array along the circumference of the connecting center disk. Each main magnet sheet includes a main center disk and multiple main magnetic blocks, which are evenly distributed in an array along the circumference of the main center disk, and the main magnetic blocks are clamped and fixed by two adjacent layers of connecting rings.

[0005] Compared with the prior art, the advantages of this invention are as follows: The main magnetic steel sheet is connected to a main central disk and multiple main magnetic blocks. The main central disk ensures the continuity and stability of the connection between the connecting magnetic steel sheets of each layer of the motor core and the main magnetic steel sheet, avoiding easy deformation and insufficient strength of the motor core. The main magnetic blocks are used to position the outer diameter of the motor core and determine the cross-sectional area of ​​the motor core. The larger the area, the higher the saturation magnetic induction intensity of the motor core, resulting in a higher maximum power of the motor during use. The main central disk and the main magnetic blocks are connected and fixed by adjacent connecting magnetic steel sheets approaching each other, which reduces the design of magnetic bridges between the main magnetic steel sheets and the main magnetic blocks, making the weight of the main magnetic steel sheets lower, thereby reducing the overall mass of the motor core and the rotational force required to drive the motor core. At the same time, because the design of magnetic bridges between the main central disk and the main magnetic blocks is reduced, the position of these magnetic bridges becomes air as the medium. The quality of the air, compared to the material of the magnetic steel sheet, further enhances the saturation magnetic induction intensity of the main magnetic steel sheet, thereby increasing the saturation magnetic induction intensity of the motor core. During the fixed connection process, the connecting center disk and connecting ring on the connecting magnetic steel sheet are fixedly connected by a connecting magnetic bridge. The connecting magnetic bridge is subjected to radial force, while two adjacent connecting center disks are used to fix the main center disk between the connecting center disks, and two adjacent connecting rings are used to fix the main magnetic block between the connecting rings. Their force direction is axial, which has little impact on the connecting magnetic bridge. Furthermore, both ends of the connecting magnetic bridge are axially supported. During the use of the motor core, if the motor core is used as a rotor, its movement direction is circumferential. Therefore, the connecting magnetic bridge only needs to serve as a connecting part between the connecting center disk and the connecting ring, without having to bear the force of other areas. Its deformation factor is small, ensuring the quality of the connecting magnetic bridge and allowing for a reduction in the design of the magnetic bridge between the main center disk and the main magnetic block. Therefore, by reducing the structural design of the motor core, the weight of the motor core is reduced without affecting its performance, making it easier to drive. Under the same weight design, the separation of the main magnetic block and the main central disk allows for a larger cross-sectional area of ​​the motor core, reducing the magnetic bridge design between the main magnetic block and the main central disk. This doubly improves the saturation magnetic induction intensity of the motor core, giving it better application prospects and greatly enhancing its cost-effectiveness.

[0006] As an improvement of the present invention, both the connecting center disk and the main body center disk are provided with connecting fasteners. One side of the connecting fastener is a conical protrusion, and the other side is a conical groove. The conical protrusion matches the conical groove of the next layer. Through this improvement, the accuracy of the process of stacking the connecting center disk and the main body center disk is ensured, thereby ensuring the accuracy of the position of the connecting ring relative to the main body center disk. When the connecting ring finishes fixing the main body magnetic block, the accuracy of the relative position between the main body center disk and the main body magnetic block can be achieved.

[0007] As an improvement of the present invention, the top and bottom ends of the automotive motor core are provided with multiple layers of connecting magnetic steel sheets. The outermost layer in the direction of the conical protrusion is provided with a stop magnetic steel sheet. The stop magnetic steel sheet is provided with a mating hole that mates with the conical protrusion. Through this improvement, under normal use, only one layer of connecting magnetic steel sheets is needed at the top and bottom ends of the automotive motor core to meet the usage requirements. However, the connecting magnetic steel sheets at the top and bottom ends also need to act as a protective layer, requiring high strength and anti-deformation ability. When the motor is subjected to external impact, the motor core can still maintain an intact structural state. The design of the mating hole is to ensure that the top and bottom ends of the automotive motor core are set in a plane, which is conducive to the placement and installation of the motor core.

[0008] As an improvement of the present invention, the stop magnet sheet includes a stop center disk and a stop ring. The stop center disk and the stop ring are connected by multiple stop magnetic bridges. The mating hole is provided on the stop center disk. The stop magnetic bridges coincide with the connecting magnetic bridges. The connection width between the stop magnetic bridge and the stop center disk is greater than the connection width between the connecting magnetic bridge and the connecting center disk. The connection width between the connecting magnetic bridge and the connecting center disk is greater than the width of the connecting magnetic bridge. Each stop magnetic bridge is located on the extension line of the central shaft and the mating hole. Through this improvement, during the rotation of the motor core, the farther away from the rotating shaft, the greater its rotational torque, because the main magnetic block is fixed by the connecting ring. This results in a greater inertial force on the connecting ring during the rotation of the motor core to ensure its normal operation. While reducing the width of the connecting magnetic bridge to minimize the weight of the motor core, it is also necessary to ensure the stability of the connection between the connecting magnetic bridge and the connecting center plate. Therefore, the connection width between the connecting magnetic bridge and the connecting center plate is increased. The design of the connection width between the stop magnetic bridge and the stop center plate can prevent the coil from acting directly on the connection width between the connecting magnetic bridge and the connecting center plate during coil winding, ensuring the integrity of the connection width between the connecting magnetic bridge and the connecting center plate and avoiding loss of the connection width between the connecting magnetic bridge and the connecting center plate during winding.

[0009] The technical solution adopted by this invention to solve the above problems is as follows: a stamping forming method for an automotive motor core, used to form an automotive motor core, the steps of which are as follows. S1: Strip feed; S2: Guide pin station, punch guide pin holes, and fix strip material; S3: Machining the inner contour of the stop ring, the contour of the stop magnetic bridge, and the outer contour of the stop center disk; S4: Perform machining on the outer contour of the stop ring section; S5: Machining the mating holes, center holes, and mounting holes of the stop center plate; S6: Blanking station, completes the fixing of the stop magnet and the processing of the overall outer contour of the stop ring, and completes the blanking of the stop magnet; S7: Guide pin station, punch guide pin holes, and fix strip material; S8: Machining the inner contour of the connecting ring, the contour of the connecting magnetic bridge, and the outer contour of the connecting center disk; S9: Perform machining on the outer contour of the connecting ring portion; S10: Machining the center hole, mounting hole, and connection points of the connecting center plate; S11: Blanking station, aligning the fasteners with the mating holes, completing the processing of the overall outer contour of the connecting ring on the connecting magnet sheet, blanking the connecting magnet sheet and stacking it on the stop magnet sheet; S12: Repeat steps S7-S10 several times, and at the blanking station, align the connecting fastener with the connecting fastener of the previous connecting magnet sheet to complete the processing of the overall outer contour of the connecting ring on the connecting magnet sheet. The connecting magnet sheet is blanked and stacked on the previous connecting magnet sheet. S13: Guide pin station, punch guide pin holes, and fix strip material; S14: Perform machining of the inner contour of the main magnetic block and the outer contour of the main central disk; S15: Process the center hole, mounting hole, and connecting fastener of the main body center plate; S16: Blanking station, the connecting fastener is aligned with the connecting fastener of the previous connecting magnetic steel sheet, and the separation processing between the main magnetic block and the main magnetic block and the main central disk is completed, so that the main magnetic block and the main central disk are blanked and stacked on the previous connecting magnetic steel sheet. S17: Repeat steps S13-S15 several times, and at the blanking station, align the connecting fastener with the connecting fastener of the previous main magnetic steel sheet to complete the separation processing between the main magnetic blocks and the main magnetic blocks and the main central disk, so that the main magnetic blocks and the main central disk are blanked and stacked on the previous main magnetic block and the main central disk accordingly. S18: Repeat steps S7-S10, and at the blanking station, align the connecting fasteners of the connecting magnetic steel sheet with the connecting fasteners of the previous main magnetic steel sheet to complete the processing of the overall outer contour of the connecting ring on the connecting magnetic steel sheet. The connecting magnetic steel sheet is blanked and stacked on the previous main magnetic steel sheet. S19: Repeat steps S13-S18 several times; S20: Repeat step S12 to complete the forming process of an automotive motor core.

[0010] Compared with the prior art, the advantages of this invention are as follows: Three different types of magnetic steel sheets can be processed through a single production line, including connecting magnetic steel sheets, main magnetic steel sheets, and stop magnetic steel sheets. Simultaneously, the processing of these three sets of magnetic steel sheets is also completed, and their stacking is also performed. During the stacking process, step S16 first aligns the main magnetic steel sheet with the main magnetic block, and then separates the main central disk from the main magnetic block, thus ensuring the accuracy of the main magnetic block stacking. Then, step S17 sequentially completes the stacking of multiple layers of main magnetic steel sheets. This alignment process is connected and consistent, with minimal deviation, ensuring the accuracy of the multi-layer main magnetic block stacking. Therefore, although the main magnetic block and the main central disk are designed separately, high-precision installation quality can still be maintained.

[0011] As an improvement of the present invention, S2, S7, and S14 are the same guide pin station, and S5, S10, and S15 are the same punching station. The punching station includes a first punching station for punching mounting holes and mating holes, and a second punching station for punching center holes and connecting fasteners. A mating hole punch for forming the mating hole is movably connected within an upper die base. The upper end of the mating hole punch also moves along the lower end face of a drawing plate. The lower end of the mating hole punch is used to form the mating hole. The lower end face of the drawing plate is provided with multiple adjusting grooves. The depth of the adjusting grooves is greater than the thickness of the strip. When the mating hole punch moves to the position of the adjusting groove, during the punching process, the mating hole punch enters the adjusting groove, moving the drawing plate. When the punch abuts against the lower end face of the drawing plate, the punch completes the forming of the mating hole during the stamping process. Through the aforementioned improvement, the processing of the three types of magnetic steel sheets utilizes the guide pin station for processing the guide pin holes and the punching station for uniform forming of mounting holes, mating holes, and connecting fasteners. This ensures that the three types of magnetic steel sheets are processed with uniform feed parameters. The accuracy is higher during the stacking of the three types of magnetic steel sheets, reducing the need for multiple alignment procedures on the stacked different magnetic steel sheets, thereby ensuring the quality of the finished automotive motor core. At the same time, due to the design of the drawing plate, the processing of mating holes can be determined by the drawing plate, so that the mating holes are only formed on the stop magnetic steel sheet, reducing the design of the punching station and saving processing costs.

[0012] As an improvement of the present invention, a step S15.5 is provided between steps S15 and S16. S15.5: performing back-jetting of the separation area between the main magnetic blocks. Through this improvement, when performing the separation stamping process of the main magnetic blocks, separation by continuous pressure on one side is prone to deformation of the main magnetic blocks, or separation by instantaneous high-speed stamping is prone to instability of the separation area between the main magnetic blocks, both of which are not conducive to the high-precision forming and stacking of the main magnetic blocks. By using the back-jetting process in step S15.5, the fatigue of the separation area is increased. When stamping is performed again, fatigue fracture can be formed in the separation area, avoiding deformation of the main magnetic blocks, ensuring the accuracy of the separation area, and realizing the high-precision forming and stacking accuracy of the main magnetic blocks. At the same time, since the main central disk and the main magnetic blocks are set separately, the main magnetic blocks cannot be completely separated from the main central disk at this time, avoiding the main magnetic blocks from shifting when the main magnetic steel sheet is unloaded at the blanking station.

[0013] As an improvement of the present invention, S4 and S9 are the same partial outer contour processing station, and S6, S11 and S16 are the same blanking station. The partial outer contour processing station and the blanking station form a complete outer contour separation structure. Through the improvement, the uniformity of the outer contour of various magnetic steel sheets is ensured, and the flatness of the outer contour of the motor core is ensured after forming.

[0014] As an improvement of the present invention, the blanking station includes a blanking punch and a blanking die. The separation area between the blanking punch and the main magnetic block is complementary. The blanking die is the common outer contour of the three types of magnetic steel sheets. Through this improvement, based on the decomposed stamping forming of the three different magnetic steel sheets, the blanking work of the three different magnetic steel sheets can be completed in the same blanking station by utilizing the difference between the blanking punch and the blanking die.

[0015] As an improvement of the present invention, the forming stations S3, S8, and S14 are arranged sequentially along the conveying direction of the strip material. The arrangement order of the stations can be adjusted. Through the improvement, the processing order of the three types of magnetic steel sheets is unified, so that the forming stations S3, S8, and S14 are set at the front end of the processing. The order is arbitrary, but when processing any magnetic steel sheet, one of the stations S3, S8, and S14 must be completed first.

[0016] As an improvement of the present invention, the above-mentioned operation steps S3, S8 and S14 all adopt multi-station step-by-step forming. Through the above improvement, because the processing area is dense, there will be interference between the processing punches. By using multi-station step-by-step forming, interference between the punches can be avoided. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the motor core of the present invention.

[0018] Figure 2 This is a schematic diagram of the stacked structure of the connecting magnet sheet, the main magnet sheet, and the stop magnet sheet of the present invention.

[0019] Figure 3 This is a schematic diagram of the connection structure between the connecting magnetic bridge and the stop magnetic bridge of the present invention.

[0020] Figure 4 This is a schematic diagram of the strip processing structure in steps S2-S3 of the present invention.

[0021] Figure 5 This is a schematic diagram of the strip processing structure in step S4 of the present invention.

[0022] Figure 6 This is a schematic diagram of the strip processing structure in step S5 of the present invention.

[0023] Figure 7 This is a schematic diagram of the strip processing structure in step S6 of the present invention.

[0024] Figure 8 This is a schematic diagram of the strip processing structure in steps S7-S8 of the present invention.

[0025] Figure 9 This is a schematic diagram of the strip processing structure in step S9 of the present invention.

[0026] Figure 10 This is a schematic diagram of the strip processing structure in step S10 of the present invention.

[0027] Figure 11 This is a schematic diagram of the material processing structure in step 11 of the present invention.

[0028] Figure 12 This is a schematic diagram of the strip processing structure in steps S13-S14 of the present invention.

[0029] Figure 13 This is a schematic diagram of the strip processing structure in step S15 of the present invention.

[0030] Figure 14 This is a schematic diagram of the strip processing structure in step S15.5 of the present invention.

[0031] Figure 15 This is a schematic diagram of the strip processing structure in step S16 of the present invention.

[0032] Figure 16 This is a schematic diagram of the structure of the lower end face of the drawing plate and the mating hole punch of the present invention.

[0033] Figure 17 This is a schematic diagram of the fitting structure of the adjusting groove and the fitting hole punch of the present invention.

[0034] Figure 18 This is a schematic diagram of the blanking punch structure of the present invention.

[0035] Figure 19 This is a schematic diagram of the blanking die structure of the present invention.

[0036] The diagram shows: 1. Connecting magnet sheet, 1.1. Connecting center plate, 1.2. Connecting ring, 1.3. Connecting magnetic bridge, 2. Main magnet sheet, 2.1. Main center plate, 2.2. Main magnetic block, 3. Connecting fastener, 4. Stop magnet sheet, 4.1. Stop center plate, 4.2. Stop ring, 4.3. Stop magnetic bridge, 4.4. Mating hole, 5. Center hole, 6. Mounting hole, 7. Guide pin station, 7.1. Guide pin hole, 8. Blanking station, 8.1. Blanking punch, 8.2. Blanking die, 9. Drawing plate, 9.1. Adjusting groove, 10. Mating hole punch, 10.1. Connecting rod, 10.2. Fixed end, 10.3. Punch end, 11. First punching station, 12. Second punching station, 13. Upper die base, 14. Pad plate. Detailed Implementation

[0037] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0038] like Figure 1-2 As shown, an automotive motor core includes multiple connecting magnet sheets 1 and multiple main magnet sheets 2. The connecting magnet sheets 1 and the main magnet sheets 2 are stacked, with multiple main magnet sheets 2 positioned between adjacent connecting magnet sheets 1. Each connecting magnet sheet 1 includes a connecting center disk 1.1 and a connecting ring 1.2. The connecting center disk 1.1 and the connecting ring 1.2 are connected by multiple connecting magnetic bridges 1.3, which are evenly distributed in an array along the circumference of the connecting center disk 1.1. Each main magnet sheet 2 includes a main center disk 2.1 and multiple main magnetic blocks 2.2. The magnetic blocks 2.2 are evenly distributed in an array around the circumference of the main body center disk 2.1. The main body magnetic blocks 2.2 are clamped and fixed by two adjacent layers of connecting rings 1.2. Both the connecting center disk 1.1 and the main body center disk 2.1 are provided with connecting fasteners 3. One side of the connecting fastener 3 is a conical protrusion, and the other side of the connecting fastener 3 is a conical groove. The conical protrusion fits into the conical groove of the next layer. The top and bottom of the automotive motor core are provided with multiple layers of connecting magnetic steel sheets 1. The outermost layer in the direction of the conical protrusion is provided with a stop magnetic steel sheet 4. The stop magnetic steel sheet 4 is provided with a mating hole 4.4 that matches the conical protrusion.

[0039] like Figure 1 , Figure 3As shown, the stop magnetic steel sheet 4 includes a stop center disk 4.1 and a stop ring 4.2. The stop center disk 4.1 and the stop ring 4.2 are connected by multiple stop magnetic bridges 4.3. The mating hole 4.4 is provided on the stop center disk 4.1. The stop magnetic bridge 4.3 is arranged to coincide with the connecting magnetic bridge 1.3. The connection width between the stop magnetic bridge 4.3 and the stop center disk 4.1 is greater than the connection width between the connecting magnetic bridge 1.3 and the connecting center disk 1.1. The connection width between the connecting magnetic bridge 1.3 and the connecting center disk 1.1 is greater than the width of the connecting magnetic bridge 1.3. Each stop magnetic bridge 4.3 is provided on the extension line of the central axis and the mating hole 4.4.

[0040] like Figure 4-15 As shown, a stamping forming method for an automotive motor core is used to form an automotive motor core, and the steps are as follows: S1: Strip feed; S2: Guide pin station 7, punch guide pin hole 7.1, fix strip material; S3: Machining the inner contour of the stop ring 4.2, the contour of the stop magnetic bridge 4.3, and the outer contour of the stop center disk 4.1; S4: Perform machining on the outer contour of the stop ring 4.2 section; S5: Machining the mating hole 4.4, center hole 5, and mounting hole 6 of the stop center plate 4.1; S6: Blanking station 8, completes the fixing of the stop magnet 4 and the processing of the overall outer contour of the stop ring 4.2, and completes the blanking of the stop magnet 4; S7: Guide pin station 7, punch guide pin hole 7.1, fix strip material; S8: Machining the inner contour of the connecting ring 1.2, the contour of the connecting magnetic bridge 1.3, and the outer contour of the connecting center disk 1.1; S9: Perform outer contour machining on the connecting ring 1.2 section; S10: Machining the center hole 5, mounting hole 6, and connecting fastener 3 of the connecting center plate 1.1; S11: Blanking station 8, the connecting fastener 3 is aligned with the mating hole 4.4, and the overall outer contour of the connecting ring 1.2 on the connecting magnet 1 is processed. The connecting magnet 1 is blanked and stacked on the stop magnet 4. S12: Repeat steps S7-S10 several times, and at blanking station 8, align the connecting fastener 3 with the connecting fastener 3 of the previous connecting magnet sheet 1 to complete the processing of the overall outer contour of the connecting ring 1.2 on the connecting magnet sheet 1. The connecting magnet sheet 1 is blanked and stacked on the previous connecting magnet sheet 1. S13: Guide pin station 7, punch guide pin hole 7.1, fix strip material; S14: Machining the inner contour of the main magnetic block 2.2 and the outer contour of the main central disk 2.1; S15: Machining the center hole 5, mounting hole 6, and connecting fastener 3 of the main body center plate 2.1; S15.5: Perform a backflush in the separation area between the main magnetic blocks 2.2; S16: Blanking station 8, the connecting fastener 3 is aligned with the connecting fastener 3 of the previous connecting magnetic steel sheet 1, completing the separation processing between the main magnetic block 2.2 and the main magnetic block 2.2 and the main central disk 2.1, so that the main magnetic block 2.2 and the main central disk 2.1 are blanked and stacked on the previous connecting magnetic steel sheet 1; S17: Repeat steps S13-S15 several times, and at the blanking station 8, align the connecting fastener 3 with the connecting fastener 3 of the previous main magnetic steel sheet 2 to complete the separation processing between the main magnetic block 2.2 and the main magnetic block 2.2 and the main central disk 2.1, so that the main magnetic block 2.2 and the main central disk 2.1 are blanked and stacked on the previous main magnetic block 2.2 and the main central disk 2.1 accordingly; S18: Repeat steps S7-S10, and at blanking station 8, align the connecting buckle 3 of the connecting magnet sheet 1 with the connecting buckle 3 of the previous main magnet sheet 2 to complete the processing of the overall outer contour of the connecting ring 1.2 on the connecting magnet sheet 1. The connecting magnet sheet 1 is blanked and stacked on the previous main magnet sheet 2. S19: Repeat steps S13-S18 several times; S20: Repeat step S12 to complete the forming process of an automotive motor core.

[0041] like Figure 4 , Figure 8 , Figure 12 As shown, the guide pin station 7 in steps S2, S7, and S14 has the same structure. When processing on a processing line, the guide pin station 7 in steps S2, S7, and S14 can be the same guide pin station 7, which makes the alignment of the three types of magnetic steel sheets more accurate and the flatness of the stacking higher during the processing and stacking process.

[0042] like Figure 6 , Figure 10 , Figure 13 As shown, the mounting holes 6 and center holes 5 in steps S5, S10, and S15 have the same structure. When processed on a single processing line, the mounting holes 6 and center holes 5 in steps S5, S10, and S15 can each be processed at the same punching station. After processing the mounting holes 6 and center holes 5, when stacking them, the concentricity and roundness of each mounting hole 6 and center hole 5 can be guaranteed, ensuring that the corresponding mounting holes 6 and center holes 5 have the same structure. This results in better balance of the motor core during rotation. The processing of the mating hole 4.4 in step S5 is as follows... Figure 16 , Figure 17 As shown, the punching station includes a first punching station 11 for punching mounting holes 6 and mating holes 4.4, and a second punching station 12 for punching center holes 5 and connecting fasteners 3. A mating hole punch 10 for forming the mating holes 4.4 is movably connected within an upper die base 13. The upper end of the mating hole punch 10 also moves along the lower end face of a drawing plate 9. The lower end of the mating hole punch 10 is used to form the mating holes 4.4. The lower end face of the drawing plate 9 is provided with multiple adjusting grooves 9.1. The depth of the adjusting grooves 9.1 is greater than the thickness of the strip material. In actual production, the depth of the adjusting grooves 9.1 is 1.7 mm, and the thickness of the strip material is 0.5 mm. When the mating hole punch 10 moves to the position of the adjusting groove 9.1, during the punching process, the mating hole punch 10 enters the adjusting groove 9.1, and the moving drawing plate... When the mating hole punch 10 abuts against the lower end face of the drawing plate 9, during the stamping process, the mating hole punch 10 completes the stamping forming of the mating hole 4.4. The mating hole punch 10 includes a connecting rod 10.1, a fixed end 10.2, and a punch end 10.3. The connecting rod 10.1 is used to move and connect within the upper die base 13. Because the mating hole punch 10 is too long, it is easy for the punch end to have low strength and be easily deformed. By disassembling the length of the mating hole punch 10, the quality of the punch end 10.3 can be guaranteed. The fixed end 10.2 is used to connect the connecting rod 10.1 and the punch end 10.3. The design of the fixed end 10.2 allows the punch end 10.3 to be replaced. At the same time, a pad 14 is provided at the bottom of the upper die base 13. Through the limiting connection between the pad 14 and the fixed end 10.2, the connecting rod 10.1 and the fixed end 10.2 can be prevented from falling off the upper die base. The movement control of the drawer 9 uses conventional technology, which can be either hydraulic or electric.

[0043] like Figure 5 , Figure 9 As shown, the outer contour machining structures in S4 and S9 above are the same, which means that steps S4 and S9 can be the same partial outer contour machining station, such as... Figure 7 , Figure 11 , Figure 15 As shown, the final blanking structures of steps S6, S11, and S16 are the same. Part of the outer contour processing and blanking station 8 form a complete outer contour separation structure. Therefore, steps S6, S11, and S16 can be the same blanking station 8, and the stacking of the motor core is completed during blanking.

[0044] like Figure 18 , Figure 19 As shown, the blanking station 8 includes a blanking punch 8.1 and a blanking die 8.2. The separation area between the blanking punch 8.1 and the main magnetic block 2.2 is complementary, and the blanking die 8.2 is the common outer contour of the three types of magnetic steel sheets.

[0045] After assembly, the stamping punches can be distributed in the order shown in the attached figures: 4-8-12-5(9)-6(10 / 13)-14-7(11 / 15), which reduces the number of attached punches. Figure 9 , 10 The design of stamping punches with sizes of 13, 11, and 15 significantly reduces manufacturing costs and production line space requirements. (Additionally...) Figure 4 , 8 In step 12, only one guide pin station 7 needs to be saved, while the processing and arrangement order of the three attached drawings can be adjusted.

[0046] like Figure 4 , Figure 8 , Figure 12 As shown, in steps S3, S8, and S14, because the processing area is dense, there will be interference between the processing punches. By forming the punches step by step through multiple stations, interference between the punches can be avoided.

[0047] This processing method allows for the direct acquisition of stacked automotive motor cores with high accuracy and flatness. Furthermore, it achieves high-precision stacking of the main magnetic block under a 2.2-part split design, resulting in higher saturation magnetic induction intensity and lower mass for the motor core, thus improving its application prospects.

[0048] The above description only illustrates the preferred embodiments of the present invention and should not be construed as limiting the scope of the claims. The present invention is not limited to the above embodiments, and variations in its specific structure are permitted. All modifications made within the scope of the independent claims of this invention are also within the scope of protection of this invention.

Claims

1. An automotive motor core, characterized in that: The device includes multiple connecting magnets (1) and multiple main magnets (2). The connecting magnets (1) and the main magnets (2) are stacked. Multiple main magnets (2) are provided between two adjacent connecting magnets (1). Each connecting magnet (1) includes a connecting center disk (1.1) and a connecting ring (1.2). The connecting center disk (1.1) and the connecting ring (1.2) are connected by multiple connecting magnetic bridges (1.3). The multiple connecting magnetic bridges (1.3) run along the connecting center disk (1.1). The main magnetic steel sheet (2) is uniformly arrayed in the circumference. It includes a main central disk (2.1) and multiple main magnetic blocks (2.2). The multiple main magnetic blocks (2.2) are uniformly arrayed in the circumference of the main central disk (2.1). The main magnetic blocks (2.2) are clamped and fixed by two adjacent connecting rings (1.2). Both the connecting central disk (1.1) and the main central disk (2.1) are provided with connecting fasteners (3). One side of the connecting fastener (3) is conical and the other side is conical. A conical groove, wherein the conical protrusion matches the conical groove of the next layer, the top and bottom of the automotive motor core are provided with multiple layers of connecting magnetic steel sheets (1), and the outermost layer in the direction of the conical protrusion is provided with a stop magnetic steel sheet (4), the stop magnetic steel sheet (4) is provided with a mating hole (4.4) that matches the conical protrusion, the stop magnetic steel sheet (4) includes a stop center disk (4.1) and a stop ring (4.2), the stop center disk (4.1) and the stop ring (4.2) are connected by multiple stop magnetic bridges (4.3), the mating The mating hole (4.4) is located on the stop center plate (4.1). The stop magnetic bridge (4.3) and the connecting magnetic bridge (1.3) are arranged to overlap. The connection width between the stop magnetic bridge (4.3) and the stop center plate (4.1) is greater than the connection width between the connecting magnetic bridge (1.3) and the connecting center plate (1.1). The connection width between the connecting magnetic bridge (1.3) and the connecting center plate (1.1) is greater than the width of the connecting magnetic bridge (1.3). Each stop magnetic bridge (4.3) is located on the extension line of the central shaft and the mating hole (4.4).

2. A stamping forming method for an automotive motor core, characterized in that, The steps for forming the automotive motor core according to claim 1 are as follows: S1: Strip feed; S2: Guide pin station (7), punch guide pin holes (7.1), and fix strip material; S3: Machining the inner contour of the stop ring (4.2), the contour of the stop magnetic bridge (4.3), and the outer contour of the stop center disk (4.1); S4: Perform machining on the outer contour of the stop ring (4.2); S5: Machining the mating hole (4.4), center hole (5), and mounting hole (6) of the stop center plate (4.1); S6: Blanking station (8) completes the fixing of the stop magnet (4) and the processing of the overall outer contour of the stop ring (4.2), and completes the blanking of the stop magnet (4); S7: Guide pin station (7), punch guide pin holes (7.1), and fix strip material; S8: Machining the inner contour of the connecting ring (1.2), the contour of the connecting magnetic bridge (1.3), and the outer contour of the connecting center disk (1.1); S9: Perform outer contour machining on the connecting ring (1.2); S10: Machining the center hole (5), mounting hole (6), and connecting fastener (3) of the connecting center plate (1.1); S11: Blanking station (8), the connecting fastener (3) is aligned with the mating hole (4.4) to complete the processing of the overall outer contour of the connecting ring (1.2) on the connecting magnet (1), the connecting magnet (1) is blanked and stacked on the stop magnet (4); S12: Repeat steps S7-S10 several times, and at the blanking station (8), align the connecting fastener (3) with the connecting fastener (3) of the previous connecting magnetic steel sheet (1) to complete the processing of the overall outer contour of the connecting ring (1.2) on the connecting magnetic steel sheet (1), and blank the connecting magnetic steel sheet (1) and stack it on the previous connecting magnetic steel sheet (1); S13: Guide pin station (7), punch guide pin holes (7.1), and fix strip material; S14: Machining the inner contour of the main magnetic block (2.2) and the outer contour of the main central disk (2.1); S15: Process the center hole (5), mounting hole (6), and connecting fastener (3) of the main body center plate (2.1); S16: Blanking station (8), the connecting fastener (3) is aligned with the connecting fastener (3) of the previous connecting magnetic steel sheet (1), and the separation processing between the main magnetic block (2.2) and the main magnetic block (2.2) is completed. The separation processing between the main magnetic block (2.2) and the main central disk (2.1) is completed, so that the main magnetic block (2.2) and the main central disk (2.1) are blanked and stacked on the previous connecting magnetic steel sheet (1); S17: Repeat steps S13-S15 several times, and at the blanking station (8), align the connecting fastener (3) with the connecting fastener (3) of the previous main magnetic steel sheet (2) to complete the separation processing between the main magnetic block (2.2) and the main magnetic block (2.2), and the separation processing between the main magnetic block (2.2) and the main central disk (2.1), so that the main magnetic block (2.2) and the main central disk (2.1) are blanked and stacked on the previous main magnetic block (2.2) and the main central disk (2.1); S18: Repeat steps S7-S10, and at the blanking station (8), align the connecting buckle (3) of the connecting magnetic steel sheet (1) with the connecting buckle (3) of the previous main magnetic steel sheet (2) to complete the processing of the overall outer contour of the connecting ring (1.2) on the connecting magnetic steel sheet (1), and blank the connecting magnetic steel sheet (1) and stack it on the previous main magnetic steel sheet (2); S19: Repeat steps S13-S18 several times; S20: Repeat step S12 to complete the forming process of an automotive motor core.

3. The stamping forming method for an automotive motor core according to claim 2, characterized in that: S2, S7, and S14 are the same guide pin station (7), and S5, S10, and S15 are the same punching station. The punching station includes a first punching station (11) for punching mounting holes (6) and mating holes (4.4) and a second punching station (12) for punching center holes (5) and connecting fasteners (3). The mating hole punch (10) for forming the mating hole (4.4) is movably connected in an upper mold base (13). The upper end of the mating hole punch (10) also moves along the lower end face of the draw plate (9). The lower end of the mating hole punch (10) is used to form the mating hole (4.4). The lower end face of the drawing plate (9) is provided with multiple adjustment grooves (9.1). The depth of the adjustment grooves (9.1) is greater than the thickness of the strip. When the mating hole punch (10) moves to the position of the adjustment groove (9.1), during the stamping process, the mating hole punch (10) enters the adjustment groove (9.1) and moves the drawing plate (9). When the mating hole punch (10) abuts against the lower end face of the drawing plate (9), during the stamping process, the mating hole punch (10) completes the stamping forming of the mating hole (4.4).

4. The stamping forming method for an automotive motor core according to claim 3, characterized in that: A step S15.5 is provided between steps S15 and S16, and its steps are as follows: S15.5: Perform a backflush in the separation area between the main magnetic blocks (2.2).

5. The stamping forming method for an automotive motor core according to claim 4, characterized in that: S4 and S9 are the same partial outer contour processing station, and S6, S11 and S16 are the same blanking station (8). The partial outer contour processing station and the blanking station (8) form a complete outer contour separation structure.

6. The stamping forming method for an automotive motor core according to claim 5, characterized in that: The blanking station (8) includes a blanking punch (8.1) and a blanking die (8.2). The blanking punch (8.1) and the main magnetic block (2.2) have complementary separation areas. The blanking die (8.2) is the common outer contour of the three types of magnetic steel sheets.

7. The stamping forming method for an automotive motor core according to claim 3, characterized in that: The forming stations S3, S8, and S14 are arranged sequentially along the conveying direction of the strip material. The arrangement order of the stations can be adjusted. The operation steps of S3, S8, and S14 all adopt multi-station step-by-step forming.

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