Process and device for producing cast aluminum rotor silicon steel sheet

Abstract

The application discloses a cast aluminum rotor silicon steel sheet production process and device, which comprises a silicon steel sheet stamping assembly, a material returning assembly and a laminating positioning assembly.The silicon steel sheet stamping assembly comprises a stamping platform which is fixed to the top outer wall of a workbench, a punch which is arranged above the stamping platform and is matched with the stamping platform, and a silicon steel sheet which is made through stamping between the punch and the stamping platform.The material returning assembly is installed on the bottom outer wall of the workbench and comprises a material returning needle which is slidably connected with the material returning hole in the inner wall of the stamping platform.The laminating positioning assembly comprises a base which is installed on one side of the output end of the stamping platform and is fixedly installed on the top of the workbench, and a central shaft which is fixedly installed on the top outer wall of the base.The application relates to the field of cast aluminum rotor silicon steel sheet production equipment, and has the functions of stamping, material returning and laminating positioning through equipment integration, the components are cooperatively matched, the structure design is reasonable, the production continuity of the cast aluminum rotor silicon steel sheet is effectively improved, and the operation complexity is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of cast aluminum rotor silicon steel sheet production equipment, specifically a cast aluminum rotor silicon steel sheet production process and apparatus. Background Technology

[0002] In the traditional production process of silicon steel sheets for cast aluminum rotors, existing equipment lacks a coordinated and compatible stamping positioning, material ejection protection, and dedicated structure for stacking inclined slots. The fitting and positioning accuracy of the punch and punch head is insufficient, the ejection method of the material ejection mechanism is prone to damaging the silicon steel sheets, the compatibility between the positioning inclined column and the winding slot is poor, and the components cannot achieve precise linkage and cooperation, resulting in unstable forming quality of silicon steel sheets, easy surface damage, and poor consistency of winding slot tilt angle, which in turn affects the subsequent assembly effect and service stability of the cast aluminum rotor. Summary of the Invention

[0003] The purpose of this invention is to provide a process and apparatus for producing silicon steel sheets for cast aluminum rotors, in order to solve the problems mentioned in the background art, such as the lack of a coordinated and compatible stamping positioning, material ejection protection and a dedicated structure for skew slot stacking, and insufficient fitting and positioning accuracy between the punching table and the punch.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A process and apparatus for producing silicon steel sheets for cast aluminum rotors, including a silicon steel sheet stamping assembly, comprising a punching table fixed on the top outer wall of a workbench, and a punch adapted to the punching table above the punching table, wherein silicon steel sheets are produced by stamping between the punch and the punching table. The ejector assembly is installed on the bottom outer wall of the worktable. The ejector assembly includes an ejector pin, and the outer wall of the tip of the ejector pin is slidably connected to the inner wall of the ejector hole on the inner wall of the punching table. A stacked positioning assembly includes a base, which is installed on one side of the output end of the punching machine and fixedly installed on the top of the worktable. A central shaft is fixedly installed on the top outer wall of the base, and positioning inclined columns are distributed circumferentially on the outer side of the central shaft.

[0005] In a preferred embodiment of the present invention, the workbench is fitted with fixed support legs at the four bottom corners, the workbench is configured as a rectangular structure, and the punching station has a shaft punching hole at the top center.

[0006] In a preferred embodiment of the present invention, the shaft punch is provided with winding slot punches around its perimeter, and two sets of ejection holes are provided, the ejection holes being located inside the winding slot punches.

[0007] In a preferred embodiment of the present invention, the ejector assembly includes a support plate, which is fixedly mounted on the bottom outer wall of the workbench via a connecting rod. The outer wall of the connecting rod is slidably connected to a slide plate, and ejector pins are fixedly mounted on the top outer walls of the left and right sides of the slide plate.

[0008] In a preferred embodiment of the present invention, a spring is sleeved on the outer wall of the connecting rod. The top of the spring is fixedly connected to the bottom outer wall of the slide plate, and the bottom of the spring is fixedly connected to the top outer wall of the support plate. The spring is used to control the resetting of the ejector pin. The top of the worktable is fixedly mounted with a top plate. A stamping cylinder is fixedly mounted on the bottom outer wall of the top plate. The output end of the stamping cylinder is fixedly connected to a punch seat. The punch is fixedly mounted on the bottom outer wall of the punch seat. Guide rods are fixedly mounted at the four bottom corners of the punch seat to the top outer wall of the worktable.

[0009] In a preferred embodiment of the present invention, a limiting plate is fixedly installed on the outer wall of the ejector needle. The limiting plate is located below the worktable. The bottom outer wall of the worktable is connected to the slide plate by a cylinder, and the cylinder is connected to an external pneumatic control device.

[0010] In a preferred embodiment of the present invention, the silicon steel sheet is provided with a plurality of stacked layers to form a rotor body structure, and the silicon steel sheet is uniformly deflected vertically to form inclined winding slots.

[0011] In a preferred embodiment of the present invention, the tilt angle of the positioning inclined post is consistent with the tilt angle of the winding slot in the stacked silicon steel sheets, and the structural shape of the positioning inclined post is adapted to the internal cavity of the inclined winding slot.

[0012] In a preferred embodiment of the present invention, the front end of the base is provided with a gap for a positioning inclined column, the gap being used to facilitate removal from the stacked positioning assembly after the silicon steel sheet has been shaped.

[0013] The manufacturing process for the silicon steel sheet of the cast aluminum rotor as described in any one of the claims is characterized by the following specific operating steps: S1: Raw material pretreatment and positioning: Select silicon steel sheet rolls that meet the performance requirements of the motor, cut them into rectangular blanks that fit the size of the punch table, lay the blanks flat on the punch table surface fixed on the top of the workbench, and ensure that the table surface is level by the support legs at the four corners of the bottom of the workbench, so as to ensure that the blanks are precisely aligned with the punch holes of the shaft and the punch holes of the winding slots of the punch table, providing a reference for subsequent stamping and forming; S2: Precision stamping: The external control system is activated to control the stamping cylinder fixed at the bottom of the top plate to output driving force, which drives the punch seat to move vertically downward along the guide rod, so that the punch fixed at the bottom of the punch seat is precisely fitted with the punch table; the central shaft hole of the silicon steel sheet is stamped out through the cooperation of the punch and the upper shaft punch hole on the punch table; at the same time, the winding slot pre-formed structure is stamped out on the silicon steel sheet through the cooperation of the punch and the winding slot punch hole. During the stamping process, the guide rod always ensures that the movement trajectory deviation of the punch is ≤0.02mm, so as to avoid warping or dimensional deviation of the silicon steel sheet; S3: Elastic Buffer Unloading: After stamping, the stamping cylinder drives the punch to reset and simultaneously starts the cylinder connected to the external pneumatic control device. The cylinder outputs thrust to push the slide plate to slide upward along the connecting rod. The unloading needle fixed at the top of the slide plate passes through the unloading hole on the punch table and pushes the silicon steel sheet attached to the surface of the punch table vertically out. During unloading, the limiting plate on the outer wall of the unloading needle limits the maximum upward stroke of the slide plate to avoid excessive unloading and damage to the silicon steel sheet. After unloading is completed, the cylinder depressurizes and the spring sleeved on the outer wall of the connecting rod drives the slide plate and the unloading needle to return to the initial position through elastic reset, waiting for the next unloading action. S4: Inclined slot layered stacking positioning: The unloaded silicon steel sheets are sequentially inserted into the central shaft of the base fixed on the top of the workbench through the central shaft hole. The circumferential positioning of the silicon steel sheets is achieved by the positioning inclined columns distributed on the outer side of the central shaft. Since the inclination angle of the positioning inclined columns is consistent with the inclination angle of the preset winding slot, and the structural shape is adapted to the internal cavity of the winding slot, each silicon steel sheet naturally deflects along the inclination direction of the positioning inclined column after being inserted, forming a uniform circumferential offset. This allows the multi-layer silicon steel sheets to directly form the inclined winding slot after being stacked. During the stacking process, the guiding effect of the positioning inclined columns ensures that the deflection error of adjacent silicon steel sheets is ≤0.03mm, and the core stacking height tolerance is controlled within ±0.05mm. S5: Shaping and Non-destructive Removal: After the silicon steel sheets are stacked to the preset rotor core height, let them stand for 3-5 minutes to shape the structure. The fit between the positioning inclined post and the winding slot is used to maintain the stability of the inclined slot structure. After the shaping is completed, the stacked silicon steel sheet assembly is slowly pulled out along the inclined tangent direction of the positioning inclined post with the help of the gap of the positioning inclined post at the front end of the base. This avoids friction damage to the inner wall of the winding slot during the removal process, and finally obtains a cast aluminum rotor silicon steel sheet stacked core with a precise inclined winding slot. S6: Innovative Optimization Process: During the stacking process, the micron-level elastic coating on the surface of the positioning inclined column makes elastic contact with the inner wall of the silicon steel sheet winding slot, which ensures positioning accuracy and avoids scratching the oxide film on the surface of the silicon steel sheet. At the same time, the stamping stage adopts a gradient cutting edge design for punching the winding slot, combined with the flexible ejection structure of the ejection pin, so that the burr height of the silicon steel sheet is controlled to ≤0.01mm, which significantly improves the metallurgical bonding effect of the subsequent aluminum casting process.

[0014] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

[0015] 1. The equipment integrates stamping, unloading, stacking, and positioning functions. All components work together in a reasonable structural design, which effectively improves the production continuity of cast aluminum rotor silicon steel sheets and reduces operational complexity. 2. Through a precise positioning structure and a reliable control module, the forming quality and stacking accuracy of silicon steel sheets are ensured, product damage during the production process is reduced, and the stability of the rotor in subsequent use is improved. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the main structure of a process and apparatus for producing silicon steel sheets for cast aluminum rotors. Figure 2 This is a side view schematic diagram of a process and apparatus for producing silicon steel sheets for a cast aluminum rotor. Figure 3 A schematic diagram of the punching platform structure in a process and apparatus for producing silicon steel sheets for cast aluminum rotors. Figure 4 A schematic diagram of the punch structure in a process and apparatus for producing silicon steel sheets for cast aluminum rotors; Figure 5 A schematic diagram of the unloading assembly in a process and apparatus for producing silicon steel sheets for cast aluminum rotors; Figure 6 This is a schematic diagram of a stacked positioning component structure in a process and apparatus for producing silicon steel sheets for a cast aluminum rotor. Figure 7 This is a schematic diagram of the silicon steel sheet stacking structure in a silicon steel sheet production process and apparatus for a cast aluminum rotor. Figure 8 This is a top view schematic diagram of the silicon steel sheet structure in a process and apparatus for producing silicon steel sheets for cast aluminum rotors.

[0017] In the diagram: workbench 100, support leg 110, punching table 200, shaft punching hole 210, winding slot punching hole 220, ejection hole 230, top plate 300, stamping cylinder 310, punch seat 320, guide rod 330, punch 340, support plate 400, connecting rod 410, spring 420, slide plate 430, cylinder 440, ejection needle 450, limit plate 451, base 500, central shaft 510, positioning inclined column 520, silicon steel sheet 600. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] Example 1: As Figures 1-6 ,include: A silicon steel sheet stamping assembly includes a punch table 200, which is fixed on the top outer wall of a worktable 100. A punch 340 adapted to the punch table 200 is provided above the punch table 200. Silicon steel sheets 600 are produced by stamping between the punch 340 and the punch table 200. The ejector assembly is installed on the bottom outer wall of the worktable 100. The ejector assembly includes an ejector pin 450, and the top outer wall of the ejector pin 450 is slidably connected to the inner wall of the ejector hole 230 on the inner wall of the punch table 200. The stacked positioning assembly includes a base 500, which is installed on one side of the output end of the punching station 200. The base 500 is fixedly installed on the top of the worktable 100. A central shaft 510 is fixedly installed on the top outer wall of the base 500. Positioning inclined columns 520 are distributed circumferentially on the outer side of the central shaft 510.

[0020] The specific application scenario of this embodiment is as follows: First, the silicon steel sheet blank is placed on the surface of the punching table fixed on the workbench. The main control unit uses a Siemens S7-200SMARTSR60 PLC to send instructions, which control the stamping power mechanism through the FESTOMFH-5-1 / 4-B cylinder solenoid valve, driving the punch to move downward and fit against the punching table. The stamping force is used to form the blank into a silicon steel sheet with a preset structure. After stamping, the ejection pin of the ejection assembly slides along the ejection hole of the punching table. The Omron E2E-X10ME1 travel proximity switch detects the reset status of the punch and sends a feedback signal to the PLC to start the ejection action, pushing the silicon steel sheet out of the punching table surface to avoid adhesion. Finally, the ejected silicon steel sheet is positioned by the central shaft and fitted into the stacking positioning assembly. The positioning inclined column on the outside of the central shaft provides circumferential limit for the silicon steel sheet, ensuring that the position reference is consistent during subsequent stacking.

[0021] Example 2: Figure 1 and Figure 2 The workbench 100 is fixedly installed at the four corners of the bottom. The workbench 100 is a rectangular structure. The top center of the punching station 200 is provided with a shaft punching hole 210. The shaft punching hole 210 is provided with winding slot punching holes 220 around it. There are two sets of ejection holes 230, which are located inside the winding slot punching holes 220.

[0022] The specific application scenario of this embodiment is as follows: The support legs at the bottom of the workbench achieve horizontal calibration of the workbench surface, avoiding dimensional deviations of the silicon steel sheet due to the tilt of the workbench surface during the stamping process. The shaft punch in the middle of the punching table cooperates with the punch to accurately punch the central shaft hole of the silicon steel sheet, providing an installation reference for the subsequent insertion of the central shaft. The winding slot punch around the shaft punch simultaneously punches out the pre-formed winding slot structure. The ejection hole is set inside the winding slot punch, so that the force when the ejection pin is ejected is concentrated in the non-core stress area of ​​the silicon steel sheet, reducing the deformation of the stamped sheet. During the stamping process, the Keyence LK-G80 displacement sensor detects the displacement of the punch in real time and feeds back the data to the Siemens S7-200SMARTSR60 PLC. The stamping pressure is adjusted in conjunction with the SMCITV2050-312BL pneumatic proportional valve to ensure the forming accuracy of the winding slot.

[0023] Example 3: Figure 2 and Figure 5 The ejector assembly includes a support plate 400, which is fixedly mounted on the bottom outer wall of the worktable 100 via a connecting rod 410. A slide plate 430 is slidably connected to the outer wall of the connecting rod 410. Ejector pins 450 are fixedly mounted on the top outer walls of the left and right sides of the slide plate 430. A spring 420 is sleeved on the outer wall of the connecting rod 410. The top of the spring 420 is fixedly connected to the bottom outer wall of the slide plate 430, and the bottom of the spring 420 is fixedly connected to the top outer wall of the support plate 400. The spring 420 is used to control the reset of the ejector pins 450. A top plate is fixedly mounted on the top of the worktable 100. 300, A stamping cylinder 310 is fixedly installed on the bottom outer wall of the top plate 300. The output end of the stamping cylinder 310 is fixedly connected to the punch seat 320. The punch 340 is fixedly installed on the bottom outer wall of the punch seat 320. Guide rods 330 are fixedly installed at the four bottom corners of the punch seat 320 and the top outer wall of the worktable 100. A limiting plate 451 is fixedly installed on the outer wall of the ejector needle 450. The limiting plate 451 is located below the worktable 100. The bottom outer wall of the worktable 100 is connected to the slide plate 430 by a cylinder 440. The cylinder 440 is connected to an external pneumatic control device.

[0024] The specific application scenario of this embodiment is as follows: This embodiment is the core of the equipment's power execution, realizing the power drive and material return reset mechanism. During the stamping stage, the top plate of the workbench fixes the stamping cylinder. The Siemens S7-200SMARTSR60 PLC controls the action of the stamping cylinder through the FESTOMFH-5-1 / 4-B cylinder solenoid valve. The cylinder output drives the punch to move through the punch holder. The guide rods at the four corners of the punch holder limit the movement trajectory to ensure the fitting accuracy between the punch and the stamping table. The BMP280 pressure sensor monitors the output of the stamping cylinder. Pressure is fed back to the control unit in real time. During the unloading stage, the external pneumatic control device starts the cylinder through the FESTOMFH-5-1 / 4-B cylinder solenoid valve, pushing the slide plate to slide upward along the connecting rod, which drives the unloading needle to complete the ejection action. The limit plate on the outer wall of the unloading needle prevents excessive ejection. After unloading is completed, the spring on the outer wall of the connecting rod pulls the slide plate back to its original position through elastic potential energy. The Omron E2E-X10ME1 travel proximity switch detects the reset state of the slide plate to prepare for the next unloading. The support plate provides fixed support for the unloading assembly to ensure the overall structural stability.

[0025] Example 4: Figure 3 , Figures 6-8 The silicon steel sheet 600 is provided with several stacked layers to form the main rotor structure. The silicon steel sheet 600 is evenly deflected up and down to form inclined winding slots. The inclination angle of the positioning column 520 is consistent with the inclination angle of the winding slots in the stacked silicon steel sheet 600. The structural shape of the positioning column 520 is adapted to the internal cavity of the inclined winding slots. The front end of the base 500 is provided with a gap of the positioning column 520. The gap is used to facilitate the removal of the silicon steel sheet 600 from the stacked positioning assembly after it has been shaped.

[0026] The specific application scenario of this embodiment is as follows: After several silicon steel sheets are sequentially inserted through the central shaft, the tilt angle of the positioning inclined post is consistent with the preset winding slot angle, and its structural shape is adapted to the cavity of the winding slot, so that each silicon steel sheet naturally deflects along the positioning inclined post after being inserted, forming a uniform circumferential offset. After multiple layers are stacked, the inclined winding slot is directly formed. During the stacking process, the Keyence LK-G80 displacement sensor detects the stacking height of the silicon steel sheets and feeds back the signal to the Siemens S7-200SMARTSR60 PLC. After reaching the preset height, the shaping program is triggered. During the static shaping process, the positioning inclined post is tightly fitted to the inner wall of the winding slot to ensure the stability of the inclined slot structure. After the shaping is completed, the stacking assembly is pulled out along the inclined tangent direction using the gap of the positioning inclined post at the front end of the base to avoid friction damage to the inner wall of the winding slot when it is removed.

[0027] Example 5: Figures 1-8 The manufacturing process for silicon steel sheets used in cast aluminum rotors includes the following specific operational steps: S1: Raw material pretreatment and positioning: Select silicon steel sheet rolls that meet the performance requirements of the motor, cut them into rectangular blanks that fit the dimensions of the punch table 200, lay the blanks flat on the surface of the punch table 200 fixed on the top of the worktable 100, and ensure that the worktable is level by the support legs 110 at the four corners of the bottom of the worktable 100, and ensure that the blanks are precisely aligned with the positions of the shaft punch holes 210 and winding slot punch holes 220 of the punch table 200, so as to provide a reference for subsequent stamping and forming; S2: Precision stamping: The external control system is activated to control the stamping cylinder 310 fixed at the bottom of the top plate 300 to output driving force, which drives the punch seat 320 to move vertically downward along the guide rod 330, so that the punch 340 fixed at the bottom of the punch seat 320 is precisely fitted with the punch table 200; the center shaft hole of the silicon steel sheet 600 is stamped out through the cooperation of the punch 340 and the upper shaft punch hole 210 of the punch table 200, and at the same time, the winding slot preform structure is stamped out on the silicon steel sheet 600 through the cooperation of the punch 340 and the winding slot punch hole 220. During the stamping process, the guide rod 330 always ensures that the movement trajectory deviation of the punch 340 is ≤0.02mm, so as to avoid the silicon steel sheet 600 from warping or dimensional deviation; S3: Elastic buffer ejection: After stamping, the stamping cylinder 310 drives the punch 340 to reset, and simultaneously starts the cylinder 440 connected to the external pneumatic control device. The cylinder 440 outputs thrust to push the slide plate 430 to slide upward along the connecting rod 410. The ejection needle 450 fixed at the top of the slide plate 430 simultaneously passes through the ejection hole 230 on the punch table 200, vertically ejecting the silicon steel sheet 600 that is attached to the surface of the punch table 200. During the ejection process, the limiting plate 451 on the outer wall of the ejection needle 450 limits the maximum upward stroke of the slide plate 430 to avoid excessive ejection and damage to the silicon steel sheet 600. After the ejection is completed, the cylinder 440 depressurizes, and the spring 420 sleeved on the outer wall of the connecting rod 410 drives the slide plate 430 and the ejection needle 450 back to the initial position through elastic reset, waiting for the next ejection action. S4: Inclined slot layered stacking positioning: The unloaded silicon steel sheets 600 are sequentially inserted into the central shaft 510 of the base 500 fixed on the top of the worktable 100 through the central shaft hole. The circumferential positioning of the silicon steel sheets 600 is achieved by using the positioning inclined columns 520 distributed circumferentially on the outer side of the central shaft 510. Since the inclination angle of the positioning inclined column 520 is consistent with the inclination angle of the preset winding slot, and the structural shape is adapted to the internal cavity of the winding slot, each silicon steel sheet 600 naturally deflects along the inclination direction of the positioning inclined column 520 after being inserted, forming a uniform circumferential offset. This allows the multi-layer silicon steel sheets 600 to directly form an inclined winding slot after being stacked. During the stacking process, the guiding effect of the positioning inclined column 520 ensures that the deflection error of adjacent silicon steel sheets 600 is ≤0.03mm, and the core stacking height tolerance is controlled within ±0.05mm. S5: Shaping and Non-destructive Removal: After the silicon steel sheets 600 are stacked to the preset rotor core height, let them stand for 3-5 minutes to shape the structure. The slant structure is kept stable by the fit between the positioning slant post 520 and the winding slot. After shaping, the stacked silicon steel sheet assembly is slowly pulled out along the inclined tangent direction of the positioning slant post 520 with the help of the gap in the positioning slant post 520 at the front end of the base 500. This avoids friction damage to the inner wall of the winding slot during the removal process, and finally obtains a cast aluminum rotor silicon steel sheet stacked core with a precise inclined winding slot. S6: Innovative Optimization Process: During the stacking process, the micron-level elastic coating on the surface of the positioning inclined column 520 makes elastic contact with the inner wall of the winding slot of the silicon steel sheet 600, which ensures positioning accuracy and avoids scratching the oxide film on the surface of the silicon steel sheet. At the same time, the stamping stage adopts a gradient cutting edge design of the punch 340 and the winding slot punch 220, combined with the flexible ejection structure of the ejection pin 450, so that the burr height of the silicon steel sheet 600 is controlled to ≤0.01mm, which significantly improves the metallurgical bonding effect of the subsequent aluminum casting process.

[0028] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A production apparatus for cast aluminum rotor silicon steel sheets, characterized in that, include: A silicon steel sheet stamping assembly includes a punch table (200) fixed on the top outer wall of a worktable (100), and a punch (340) adapted to the punch table (200) is provided above the punch table (200). The punch (340) and the punch table (200) are used to stamp silicon steel sheets (600). The ejector assembly is installed on the bottom outer wall of the workbench (100). The ejector assembly includes an ejector pin (450). The top outer wall of the ejector pin (450) is slidably connected to the inner wall of the ejector hole (230) of the inner wall of the punching table (200). The stacked positioning assembly includes a base (500) which is installed on the output end side of the punching machine (200). The base (500) is fixedly installed on the top of the worktable (100). A central shaft (510) is fixedly installed on the top outer wall of the base (500). Positioning inclined columns (520) are distributed circumferentially on the outer side of the central shaft (510).

2. The cast aluminum rotor silicon steel sheet production apparatus according to claim 1, characterized in that, The workbench (100) is fixedly installed at the four corners of its bottom. The workbench (100) is a rectangular structure. The punching station (200) has a shaft punch hole (210) at the top center.

3. The cast aluminum rotor silicon steel sheet production apparatus according to claim 2, characterized in that, The shaft punch (210) is surrounded by winding slot punches (220), and there are two sets of ejection holes (230), which are located inside the winding slot punches (220).

4. The cast aluminum rotor silicon steel sheet production apparatus according to claim 1, characterized in that, The ejector assembly includes a support plate (400), which is fixedly installed on the bottom outer wall of the workbench (100) via a connecting rod (410). The outer wall of the connecting rod (410) is slidably connected to a slide plate (430), and ejector pins (450) are fixedly installed on the top outer walls of the left and right sides of the slide plate (430).

5. The cast aluminum rotor silicon steel sheet production apparatus according to claim 4, characterized in that, A spring (420) is fitted on the outer wall of the connecting rod (410). The top of the spring (420) is fixedly connected to the bottom outer wall of the slide plate (430), and the bottom of the spring (420) is fixedly connected to the top outer wall of the support plate (400). The spring (420) is used to control the resetting of the ejector needle (450). The top of the worktable (100) is fixedly installed with a top plate (300). A stamping cylinder (310) is fixedly installed on the bottom outer wall of the top plate (300). The output end of the stamping cylinder (310) is fixedly connected to the punch seat (320). The punch (340) is fixedly installed on the bottom outer wall of the punch seat (320). Guide rods (330) are fixedly installed at the four bottom corners of the punch seat (320) and the top outer wall of the worktable (100).

6. The cast aluminum rotor silicon steel sheet production apparatus according to claim 5, characterized in that, The outer wall of the ejector needle (450) is fixedly installed with a limiting plate (451), the limiting plate (451) is located below the workbench (100), the bottom outer wall of the workbench (100) is connected to the slide plate (430) by a cylinder (440), and the cylinder (440) is connected to an external pneumatic control device.

7. The apparatus for producing silicon steel sheets from cast aluminum rotors according to claim 1, characterized in that, The silicon steel sheet (600) is provided with several stacked layers to form the rotor body structure, and the silicon steel sheet (600) is uniformly deflected up and down to form inclined winding slots.

8. The cast aluminum rotor silicon steel sheet production apparatus according to claim 7, characterized in that, The tilt angle of the positioning inclined post (520) is consistent with the tilt angle of the winding slot in the stacked silicon steel sheets (600), and the structural shape of the positioning inclined post (520) is adapted to the internal cavity of the inclined winding slot.

9. The cast aluminum rotor silicon steel sheet production apparatus according to claim 8, characterized in that, The base (500) has a gap for a positioning inclined column (520) at its front end. The gap is used to facilitate the removal of the silicon steel sheet (600) from the stacked positioning assembly after it has been shaped.

10. The manufacturing process for the silicon steel sheet of the cast aluminum rotor as described in any one of claims 1-9 is characterized in that, The specific operating steps are as follows: S1: Raw material pretreatment and positioning: Select silicon steel sheet rolls that meet the performance requirements of the motor, cut them into rectangular blanks that fit the size of the punching table (200), lay the blanks flat on the surface of the punching table (200) fixed on the top of the worktable (100), and ensure that the table surface is level by the support legs (110) at the four corners of the bottom of the worktable (100), and ensure that the blanks are precisely aligned with the shaft punching holes (210) and winding slot punching holes (220) of the punching table (200), so as to provide a reference for subsequent stamping forming; S2: Precision stamping: Start the external control system to control the stamping cylinder (310) fixed at the bottom of the top plate (300) to output driving force, drive the punch seat (320) to move vertically downward along the guide rod (330), so that the punch (340) fixed at the bottom of the punch seat (320) is precisely fitted with the punch table (200); the center shaft hole of the silicon steel sheet (600) is stamped out through the cooperation of the punch (340) and the shaft punch hole (210) on the punch table (200), and at the same time, the winding slot preform structure is stamped out on the silicon steel sheet (600) through the cooperation of the punch (340) and the winding slot punch hole (220). During the stamping process, the guide rod (330) always ensures that the movement trajectory deviation of the punch (340) is ≤0.02mm, so as to avoid the silicon steel sheet (600) from warping or dimensional deviation; S3: Elastic buffer ejection: After stamping is completed, the stamping cylinder (310) drives the punch (340) to reset, and simultaneously starts the cylinder (440) connected to the external pneumatic control device. The cylinder (440) outputs thrust to push the slide plate (430) to slide upward along the connecting rod (410). The ejection needle (450) fixed at the top of the slide plate (430) simultaneously passes through the ejection hole (230) on the punch table (200) and vertically pushes out the silicon steel sheet (600) that is attached to the surface of the punch table (200). During the ejection process, the limiting plate (451) on the outer wall of the ejection needle (450) limits the maximum upward stroke of the slide plate (430) to avoid excessive ejection and damage to the silicon steel sheet (600). After the ejection is completed, the cylinder (440) depressurizes, and the spring (420) sleeved on the outer wall of the connecting rod (410) drives the slide plate (430) and the ejection needle (450) to return to the initial position through elastic reset, waiting for the next ejection action. S4: Inclined slot layered stacking positioning: The unloaded silicon steel sheets (600) are sequentially inserted into the central shaft (510) of the base (500) fixed on the top of the worktable (100) through the central shaft hole. The circumferential positioning of the silicon steel sheets (600) is achieved by using the positioning inclined columns (520) distributed circumferentially on the outer side of the central shaft (510). Since the inclination angle of the positioning inclined column (520) is consistent with the inclination angle of the preset winding slot, and the structural shape is adapted to the internal cavity of the winding slot, each silicon steel sheet (600) naturally deflects along the inclination direction of the positioning inclined column (520) after being inserted, forming a uniform circumferential offset. This allows the multi-layer silicon steel sheets (600) to directly form an inclined winding slot after being stacked. During the stacking process, the deflection error of adjacent silicon steel sheets (600) is ≤0.03mm through the guiding effect of the positioning inclined column (520), and the core stacking height tolerance is controlled within ±0.05mm. S5: Shaping and Non-destructive Removal: After the silicon steel sheets (600) are stacked to the preset rotor core height, they are left to stand for 3-5 minutes for structural shaping. The slant structure is kept stable by the fit between the positioning slant column (520) and the winding slot. After shaping, the stacked silicon steel sheet assembly is slowly pulled out along the inclined tangent direction of the positioning slant column (520) with the help of the gap of the positioning slant column (520) set at the front end of the base (500). This avoids friction damage to the inner wall of the winding slot during the removal process, and finally obtains a cast aluminum rotor silicon steel sheet stacked core with a precise inclined winding slot. S6: Innovative optimization process: During the stacking process, the micron-level elastic coating on the surface of the positioning inclined column (520) makes elastic contact with the inner wall of the winding slot of the silicon steel sheet (600), which not only ensures the positioning accuracy but also avoids scratches on the oxide film on the surface of the silicon steel sheet; at the same time, the stamping stage adopts the gradient cutting edge design of the punch (340) and the winding slot punch (220), combined with the flexible ejection structure of the ejector pin (450), so that the burr height of the silicon steel sheet (600) is controlled to ≤0.01mm, which significantly improves the metallurgical bonding effect of the subsequent aluminum casting process.

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