A continuous punching device for different slot types of large stator and rotor punching sheets for high-efficiency motors

Abstract

This invention discloses a continuous grooving device for large stator and rotor laminations of different slot types for high-efficiency motors, relating to the field of motor lamination processing technology. It includes a grooving machine tool, with a transverse mold-changing assembly positioned below the output shaft of the machine tool. The transverse mold-changing assembly comprises a multi-station mounting frame, an upper mounting base, and a lower mounting base. A drive beam is slidably mounted on the lower mounting base, and a linkage locking post is mounted on the drive beam. Multiple grooving mold units are mounted on one side of the drive beam, each with a different shaped cutting tool and slot. The multi-station mounting frame has cylinder-driven limiting posts on both sides for rapid loading and unloading. This application divides the large mold into multiple modular small molds according to the lamination sector distribution pattern, with each small mold integrating all slots within the same sector. It can adapt to small machine tools, and different types of small molds can be freely combined, suitable for processing laminations with various slot types, reducing equipment and design / processing costs.

Description

Technical Field

[0001] This invention relates to the field of motor lamination processing technology, specifically a continuous grooving device for large stator and rotor laminations of high-efficiency motors with different groove types. Background Technology

[0002] In the field of high-efficiency motor manufacturing, the slotting process of large stator and rotor laminations is one of the key processes determining motor performance. Large stator and rotor laminations typically have complex slot structures, with different sectors often containing slots of varying shapes and sizes. This asymmetry in slot distribution presents a significant challenge to the slotting process. Traditional single-slot punching with equally divided angles requires strict axisymmetry between the stator and rotor slots. Therefore, traditional slotting methods mainly employ large, integral molds in conjunction with large punch presses. While this approach can accomplish the slotting task to some extent, it suffers from significant drawbacks such as high equipment costs, long mold customization cycles, and poor versatility. However, with the rapid development of the new energy vehicle drive motor industry, the slot distribution on the stator and rotor laminations of drive motor cores exhibits a less than perfectly axisymmetric characteristic. Specifically, the slot structure of these laminations can be divided into multiple different sectors, with significant differences in the shape, size, and distribution of slots within each sector. Traditional single-slot punching with equally divided angles, due to the requirement to strictly maintain axisymmetry, is no longer suitable for processing such complex slot distributions.

[0003] To address the aforementioned issues, a new solution can be adopted: multi-cutting edge dies corresponding to multiple sectors. A switching mechanism enables left-right translation of the multi-cutting dies, while the rotation of the worktable facilitates switching between different sectors. Specifically, large, integral dies require customized design for each specific lamination specification. This not only results in expensive die development but also limits their application to processing only a single type of lamination once manufactured. When product specifications change, they become unusable, leading to significant resource waste. Furthermore, the procurement and maintenance costs of large punch presses are substantial, often prohibitive for small and medium-sized manufacturing enterprises. Simultaneously, traditional integral dies require specialized tools and lengthy debugging times for replacement, and consistent positioning accuracy is difficult to guarantee, leading to fluctuations in processing quality between different batches. With the increasing demand for product diversification and customization in the motor industry, and the deepening transformation of manufacturing towards intelligence and efficiency, the high cost, low efficiency, and poor versatility of traditional grooving processing methods are becoming increasingly prominent, making them unable to meet the production needs of modern motor manufacturing.

[0004] Therefore, there is an urgent need to develop a continuous grooving device that can complete the processing of various slotted laminations at a lower cost and higher efficiency, in order to meet the practical needs of the motor manufacturing industry to quickly respond to market changes and enhance competitiveness. Summary of the Invention

[0005] This invention aims to address the problems of high design and manufacturing costs and limited application range of large molds in the prior art for slotting processing of large motor stator and rotor laminations.

[0006] A continuous grooving device for large stator and rotor laminations of different slot types for high-efficiency motors is provided, including a grooving machine tool. A transverse mold changing assembly is disposed below the output shaft of the grooving machine tool. The transverse mold changing assembly includes a multi-station mounting frame fixedly mounted on the output shaft of the grooving machine tool, with an upper mounting base fixedly connected to the bottom of the multi-station mounting frame. A lower mounting base is disposed below the upper mounting base, and guide slots are provided at the top and bottom of the lower mounting base and the upper mounting base, respectively. A drive beam is slidably disposed on the lower mounting base, and a linkage locking pin is disposed on the drive beam, which can move along the vertical direction of the drive beam. A grooving die unit is disposed on one side of the drive beam, and multiple grooving die units are provided, each of which has a different shaped cutting tool and slot.

[0007] Furthermore, the grooving die unit specifically includes a lower die mounting plate slidably disposed on the lower mounting base. A mating groove is formed on the lower die mounting plate, and a linkage pin on the drive beam engages with the mating groove on the lower die mounting plate. A concave template is fixedly connected to the lower die mounting plate, and a mating cutting edge is formed on the concave template.

[0008] Furthermore, a guide telescopic column is fixedly connected to the lower mold mounting plate on one side of the concave template, and a telescopic spring is sleeved on the telescopic end of the guide telescopic column. The upper mold mounting plate is fixedly connected to the top of the guide telescopic column.

[0009] Furthermore, both the top of the upper mold mounting plate and the bottom of the lower mold mounting plate are provided with snap-fit ​​protrusions that mate with the guide slot. The bottom of the upper mold mounting plate is fixedly connected to the upper template, and the bottom of the upper template is fixedly connected to the integrated grooving tool.

[0010] Furthermore, guide posts are movably installed at the bottom ends of the upper templates on both sides of the integrated grooving cutter, and telescopic springs are sleeved on the guide posts. The guide posts are slidably connected to the upper templates along the vertical direction of the bottom surface of the upper templates. A stripper plate is fixedly connected to the bottom of the guide posts, and a cutter through slot is formed on the stripper plate, which is correspondingly matched with the integrated grooving cutter.

[0011] Furthermore, positioning slots are provided on both sides of the top of the upper mold mounting plate, and a positioning slot is also provided on the side of the upper mounting base near the upper mold mounting plate. The cross-section of each positioning slot is semi-circular, and when the upper mold mounting plate and the upper mounting base are aligned, the two semi-circular positioning slots form a circular positioning slot.

[0012] Furthermore, cylinders are fixedly connected to both sides of the multi-station mounting frame, and a linkage rod is fixedly connected to the telescopic end of the cylinder. A limiting post is fixedly connected to the bottom end of the linkage rod near the upper mold mounting plate, and the limiting post is correspondingly engaged with the positioning slot.

[0013] Furthermore, a waste outlet is provided on the lower mounting base below the multi-station mounting frame.

[0014] Furthermore, a feeding assembly is provided on one side of the grooving machine. The feeding assembly includes an extension platform with a movable groove formed on it. A lead screw is rotatably connected within the movable groove, and a movable seat is threaded onto the lead screw. A rotary motor is fixedly connected to the movable seat. A rotary positioning column is fixedly connected to the end of the output shaft of the rotary motor. Guide rods are fixedly connected to the top of the extension platform on both sides of the movable groove, and the upper sides of the movable seat are slidably connected to the guide rods.

[0015] Furthermore, the rotating positioning post has a protruding structure on its side for engaging with the process groove on the inner ring of the lamination. The process groove is a pre-reserved process groove before the lamination is punched.

[0016] Furthermore, a mounting arm is slidably connected to the side wall of the grooving machine, and a mounting rod is fixedly connected to the end of the mounting arm. A lifting drive rod is fixedly connected to one side of the mounting rod, and a support frame is fixedly connected to the telescopic end of the lifting drive rod. A drive motor is fixedly connected to the support frame. A pressure cover is fixedly connected to the end of the output shaft of the drive motor, and a mating groove is provided at the bottom end of the pressure cover. The mating groove is correspondingly fitted to the rotating positioning column.

[0017] The beneficial effects of this invention are as follows: By setting a transverse mold-changing component, the traditional complete large mold is divided into multiple independently controllable modular small molds according to the distribution pattern of stamping sectors. Each small mold integrates all slots within the same sector, and each small mold is connected to the base through a standardized interface, allowing for free combination and use according to the stamping slot shape requirements. This design optimizes the large mold into multiple different types of small molds, thus adapting to the use of small machine tools. Furthermore, the different types of small molds can be freely combined, making it suitable for processing stampings with various slot shapes, thus expanding its application range and reducing design and processing costs.

[0018] By setting up a feeding worktable, the stamping sheet can be rotated intermittently. Simultaneously, the machine tool is equipped with laterally adjustable molds. The mold type is designed according to the type of groove on the same sector of the stamping sheet. If the groove type is different for each sector, multiple corresponding molds are designed. When the stamping sheet rotates, the corresponding mold moves to the corresponding processing position to perform the corresponding groove processing, improving the efficiency of rapid grooving of different sectors and groove types on large stamping sheets. This invention employs an innovative structure where semi-circular positioning slots connect to form a complete circular slot, combined with cylinder-driven limiting posts, enabling rapid mold loading and unloading and precise positioning without the need for specialized tools or lengthy debugging time. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a continuous slotting device for large stator and rotor laminations of high-efficiency motors with different slot types.

[0020] Figure 2 This is a side view schematic diagram of the overall structure of a continuous slotting device for large stator and rotor laminations of high-efficiency motors with different slot types.

[0021] Figure 3 This is a top view schematic diagram of the overall structure of a continuous slotting device for large stator and rotor laminations of high-efficiency motors with different slot types.

[0022] Figure 4 This is a bottom view schematic diagram of the overall structure of a continuous slotting device for large stator and rotor laminations of high-efficiency motors with different slot types.

[0023] Figure 5 This is a side-top view of a continuous slotting device for large stator and rotor laminations of high-efficiency motors with different slot types.

[0024] Figure 6 This is a schematic diagram of the rear view structure of a continuous grooving device for large stator and rotor laminations of high-efficiency motors with different slot types.

[0025] Figure 7 This is a side view of a continuous grooving device for large stator and rotor laminations of high-efficiency motors with different slot types.

[0026] Figure 8 This is a schematic diagram of the overall structure from the front view of a continuous slotting device for large stator and rotor laminations of high-efficiency motors with different slot types.

[0027] In the diagram: 1. Slotting machine; 2. Transverse mold changing assembly; 201. Upper mounting base; 202. Upper mold mounting plate; 203. Upper template; 204. Guide telescopic column; 205. Stripper plate; 206. Guide column; 207. Lower mold mounting plate; 208. Concave template; 209. Lower mounting base; 210. Cylinder; 211. Linkage rod; 212. Limiting column; 213. Positioning slot; 214. Snap-fit ​​protrusion; 215. Guide slot; 216. Drive beam; 217. Linkage locking column; 218. Connecting groove; 21 9. Integrated grooving tool; 220. Tool through slot; 221. Scrap outlet; 222. Matching cutting edge; 223. Multi-station mounting bracket; 3. Clamping assembly; 301. Mounting arm; 302. Mounting rod; 303. Lifting drive rod; 304. Bearing frame; 305. Pressure cover; 306. Matching groove; 307. Drive motor; 4. Feeding assembly; 401. Extension platform; 402. Moving seat; 403. Lead screw; 404. Rotating motor; 405. Rotating positioning column; 406. Guide rod; 407. Moving slot. Detailed Implementation

[0028] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0029] like Figures 1 to 8 As shown in the figure, the continuous grooving device 100 for large stator and rotor laminations of large motors according to an embodiment of the present invention mainly includes four core parts: a grooving machine tool 1, a transverse mold changing assembly 2, a clamping assembly 3, and a feeding assembly 4. These parts cooperate to achieve efficient continuous grooving processing of large motor stator and rotor laminations. The grooving machine tool 1 serves as the supporting body and working platform of the entire device, and its output shaft drives the entire transverse mold changing assembly 2 to perform the stamping action. The transverse mold changing assembly 2 is installed below the output shaft of the grooving machine tool 1 and is responsible for enabling rapid mold changes and precise positioning; it is the core innovative component of this invention. The clamping assembly 3 is located on the side wall of the grooving machine tool 1 and is used to clamp and fix the laminations, ensuring stability during the grooving process. The feeding assembly 4 is located on one side of the grooving machine tool 1 and is responsible for feeding the laminations into the processing area and driving them to rotate intermittently to complete the grooving processing of different sectors.

[0030] The overall structure of the transverse mold changing assembly 2 is as follows: Figure 2 and Figure 3As shown, the component includes a multi-station mounting bracket 223, multiple sets of grooving die units, and a drive beam 216 that drives these die units to move laterally. The multi-station mounting bracket 223 is fixedly mounted on the output shaft of the grooving machine tool 1. When the output shaft of the grooving machine tool 1 reciprocates, the multi-station mounting bracket 223 moves up and down accordingly, thereby driving all the components mounted on the multi-station mounting bracket 223 to complete the stamping action. An upper mounting base 201 is fixedly connected to the bottom of the multi-station mounting bracket 223. The upper mounting base 201 and the lower mounting base 209 are arranged vertically opposite each other, forming a die mounting space between them. Guide slots 215 are provided at the top of the lower mounting base 209 and the bottom of the upper mounting base 201. The guide slots 215 extend along the width direction of the lower mounting base 209, providing a guiding function for the components installed therein. The drive beam 216 is also slidably mounted on the lower mounting base 209, and the drive beam 216 can move horizontally on the lower mounting base 209 along the direction of the guide slots 215. A linkage locking post 217 is provided on the drive beam 216. The linkage locking post 217 can move along the vertical direction of the drive beam 216. This design allows the linkage locking post 217 to adapt to and drive the grooving die unit in different positions. Multiple grooving die units are provided on one side of the drive beam 216. Each grooving die unit has a different shaped cutting tool and groove to adapt to the different groove requirements of different sectors on the stamped piece.

[0031] The specific structure of the grooving die unit is as follows: Figures 2-6 As shown, this unit mainly includes a lower die mounting plate 207, a concave template 208, an upper die mounting plate 202, an upper template 203, an integrated grooving cutter 219, a stripper plate 205, and related guiding and elastic reset mechanisms. The lower die mounting plate 207 is slidably mounted on the lower mounting base 209. A mating groove 218 is provided on the lower die mounting plate 207, and a linkage pin 217 on the drive beam 216 forms an insertion fit with the mating groove 218 on the lower die mounting plate 207. When the drive beam 216 needs to move a certain grooving die unit, the linkage pin 217 inserts into the corresponding mating groove 218 of the lower die mounting plate 207, achieving power transmission and position locking through their cooperation. A concave template 208 is fixedly connected to the lower die mounting plate 207. A mating cutting edge 222 is provided on the concave template 208. The shape of the mating cutting edge 222 corresponds to the groove shape to be machined on the punch sheet and is the cutting edge part for actual grooving.

[0032] A guide telescopic column 204 is fixedly connected to the lower die mounting plate 207 on one side of the concave template 208. The telescopic end of the guide telescopic column 204 extends upward and is fitted with a telescopic spring. The top of the guide telescopic column 204 is fixedly connected to the upper die mounting plate 202. When the upper die mounting plate 202 moves downward for stamping, the guide telescopic column 204 compresses the telescopic spring, providing a buffer for the stamping process. Both the top of the upper die mounting plate 202 and the bottom of the lower die mounting plate 207 have snap-fit ​​protrusions 214 that cooperate with the guide slots 215. The snap-fit ​​protrusions 214 engage with the guide slots 215, serving a dual function of positioning and guiding, ensuring the positional accuracy of the stamping die unit during installation and movement.

[0033] An upper template 203 is fixedly connected to the bottom of the upper mold mounting plate 202, and an integrated grooving cutter 219 is fixedly connected to the bottom of the upper template 203. The integrated grooving cutter 219 is another core innovation of this invention; it integrates multiple different slots within the same sector of the stamping piece into a single unit, forming a sector-integrated slot layout. Compared to the traditional design where each slot uses an independent punch, the integrated grooving cutter 219 significantly reduces the number of molds and the frequency of mold changes, improving processing efficiency. Guide posts 206 are movably mounted at the bottom ends of the upper template 203 on both sides of the integrated grooving cutter 219, and telescopic springs are also fitted onto the guide posts 206. The guide posts 206 are slidably connected relative to the upper template 203 along the vertical direction of the bottom surface of the upper template 203. This sliding arrangement allows the guide posts 206 to remain parallel to the stamping piece during the stamping process, improving the grooving quality. A stripper plate 205 is fixedly connected to the bottom of the guide post 206. The two ends of a telescopic spring are fixedly connected to the upper template 203 and the stripper plate 205, respectively. A tool slot 220 is provided on the stripper plate 205, which corresponds to and engages with the integrated punching tool 219. After punching is completed, the stripper plate 205 resets under the action of the telescopic spring, scraping off the waste material stuck on the tool and preventing waste accumulation from affecting the next punching.

[0034] The positioning mechanism is a key component for enabling rapid mold changes. For example... Figures 2-3As shown, positioning slots 213 are provided on both sides of the top of the upper mold mounting plate 202, and positioning slots 213 are also provided on the side of the upper mounting base 201 near the upper mold mounting plate 202. The positioning slots 213 have a semi-circular cross-sectional shape. When the upper mold mounting plate 202 and the upper mounting base 201 are assembled, the two semi-circular positioning slots 213 are joined to form a complete circular positioning slot. This semi-circular joining design makes the fit of the positioning slots 213 more precise. Cylinders 210 are fixedly connected to both side walls of the multi-station mounting frame 223. A linkage rod 211 is fixedly connected to the telescopic end of the cylinder 210. A limit post 212 is fixedly connected to the bottom end of the linkage rod 211 near the side of the upper mold mounting plate 202. The limit post 212 is correspondingly engaged with the positioning slot 213.

[0035] During actual mold replacement, the operator first extends the linkage rod 211 via cylinder 210, causing the limit pin 212 to retract from the positioning slot 213, thus unlocking the grooving mold unit from the upper mounting base 201. Then, depending on the specific tool type required for the next grooving operation, the operator moves the drive beam 216 laterally. The drive beam 216, via the linkage pin 217, moves the corresponding grooving mold unit along the guide slot 215 on the lower mounting base 209. When the positioning slot 213 on the target grooving mold unit aligns with the position on the upper mounting base 201, cylinder 210 retracts and resets, causing the limit pin 212 to insert into the positioning slot 213 via the linkage rod 211, achieving precise positioning. The entire mold replacement process is quick and convenient, requiring no specialized tools and significantly reducing debugging time.

[0036] The lower mounting base 209 below the multi-station mounting frame 223 has a waste outlet 221. After actual grooving, the waste will pass through the matching cutting edge 222 on the concave template 208 and fall from the waste outlet 221 on the lower mounting base 209, completing the automatic collection and processing of waste and avoiding the accumulation of waste that affects the processing quality.

[0037] The structure of clamping component 3 is as follows Figure 4As shown, this component is mounted on the side wall of the punching machine 1 and is used to press and fix the punch pieces placed on the feeding assembly 4. The pressing assembly 3 includes a mounting arm 301, a mounting rod 302, a lifting drive rod 303, a support frame 304, a drive motor 307, and a pressure cover 305. The mounting arm 301 is slidably connected to the side wall of the punching machine 1. The mounting rod 302 is fixedly connected to the end of the mounting arm 301, and the lifting drive rod 303 is fixedly connected to one side of the mounting rod 302. The support frame 304 is fixedly connected to the telescopic end of the lifting drive rod 303, and the drive motor 307 is fixedly connected to the support frame 304. The pressure cover 305 is fixedly connected to the end of the output shaft of the drive motor 307. A mating groove 306 is provided at the bottom end of the pressure cover 305, and the mating groove 306 is correspondingly fitted with the rotating positioning post 405 on the feeding assembly 4.

[0038] In practical use, after the pressure cover 305 aligns with the rotating positioning post 405, the lifting drive rod 303 moves the pressure cover 305 downward, causing the mating groove 306 to fit onto the rotating positioning post 405, thus achieving the clamping and fixing of the punch. The drive motor 307 can drive the pressure cover 305 for fine-tuning to ensure the accuracy of the clamping position. The mounting arm 301 can slide on the side wall of the punching machine 1, allowing the clamping assembly 3 to adapt to punches of different sizes, thus having good versatility.

[0039] The structure of the feeding component 4 is as follows Figure 1 , Figure 2 and Figure 3 As shown, this component is located on one side of the punching machine 1 and is responsible for feeding the punch into the processing area and driving it to rotate intermittently. The feeding component 4 includes an extension table 401, a movable seat 402, a lead screw 403, a rotary motor 404, a rotary positioning column 405, a guide rod 406, and a moving groove 407. The extension table 401 has a moving groove 407, and the lead screw 403 is rotatably connected in the moving groove 407. The movable seat 402 is threaded onto the lead screw 403. The rotary motor 404 is fixedly connected to the moving seat 402, and the rotary positioning column 405 is fixedly connected to the end of the output shaft of the rotary motor 404. The guide rods 406 are fixedly connected to the top of the extension table 401 on both sides of the moving groove 407. The upper sides of the moving seat 402 are slidably connected to the guide rods 406. This sliding connection design ensures the stability of the moving seat 402 during movement. A rotating handle is rotatably connected to the extension platform 401 on one side of the lead screw 403. The end of the rotating handle is fixedly connected to the end of the lead screw 403. The operator can drive the lead screw 403 to rotate by rotating the handle, thereby driving the moving seat 402 to move along the guide rod 406 to adjust the feeding position.

[0040] The rotating positioning post 405 has a raised structure on its side, and a process groove is formed on the inner ring of the punch to engage with this raised structure. The process groove is pre-reserved before the punch is manufactured to ensure accurate positioning between the punch and the rotating positioning post 405. During the grooving operation, the rotating motor 404 drives the punch to rotate intermittently via the rotating positioning post 405. The punch stops after rotating one sector angle, waiting for the corresponding grooving die unit to perform the grooving process.

[0041] In practical applications, when using this invention to perform slotting processing on large motor stator and rotor laminations, the appropriate combination of slotting die units is first selected based on the slot distribution of the laminations to be processed. If the slot types in each sector of the lamination are the same, a single slotting die unit can be selected for processing. If the slot types in each sector of the lamination are different, multiple slotting die units corresponding to different sectors need to be selected and installed sequentially on the lower mounting base 209, and lateral switching is achieved through the drive beam 216 and the linkage locking post 217.

[0042] The specific processing flow is as follows: The blank to be processed is placed on the rotating positioning post 405 of the feeding assembly 4. The protruding structure on the side of the rotating positioning post 405 is engaged in the process groove of the inner ring of the blank, achieving initial positioning. Subsequently, the lifting drive rod 303 of the clamping assembly 3 is activated, causing the pressure cover 305 to move down, cooperating with the groove 306 and the rotating positioning post 405 to firmly press the blank onto the expansion table 401. The rotating motor 404 is started, driving the blank to rotate to the processing position of the first sector according to the preset sector division angle. The drive beam 216 of the transverse mold changing assembly 2 is adjusted to move the grooving mold unit corresponding to the first sector to the stamping position. The output shaft of the grooving machine tool 1 drives the multi-station mounting frame 223 downward, driving the integrated grooving tool 219 through the blank, and completing the groove stamping under the action of the cooperating cutting edge 222 of the concave template 208. After stamping is completed, the output shaft of the punching machine 1 is reset, and the stripper plate 205 scrapes off the waste material under the action of the telescopic spring. The waste material is discharged through the waste outlet 221. The rotary motor 404 is restarted, rotating the stamping piece to the processing position of the next sector. At the same time, the drive beam 216 drives the next punching die unit to move to the stamping position, and the above stamping process is repeated until the slotting of the entire stamping piece is completed.

[0043] Compared to existing technologies, this invention utilizes a modular, disassembled mold architecture design. It breaks down traditional large, complete molds into multiple independently controllable modular small molds based on the distribution of stamping sectors. Each small mold integrates all slots within the same sector. This design optimizes the large mold into multiple different types of small molds, adapting to smaller machine tools. Furthermore, different types of small molds can be freely combined according to stamping slot requirements, resulting in wider applicability and lower design and processing costs. The standardized quick-change interface design makes mold replacement fast and convenient, with a positioning accuracy repeatability of no more than 0.02 mm. It requires no specialized tools or lengthy debugging time, significantly improving processing efficiency.

[0044] In other embodiments, the multi-station mounting bracket 223 can accommodate more slotting die unit mounting positions to adapt to the stamping processing needs of pieces with more sectors or more complex slot distributions. The number and arrangement of the slotting die units can be adjusted according to actual production conditions, further enhancing flexibility and adaptability.

[0045] In other embodiments, the telescopic springs on the guide telescopic post 204 and guide post 206 can be springs of different stiffnesses to accommodate stamping sheets of different thicknesses and materials. For thinner stamping sheets, springs with lower stiffness can be used to reduce the stamping impact force; for thicker stamping sheets, springs with higher stiffness are used to ensure proper stamping.

[0046] In other embodiments, the mating cutting edge 222 on the concave template 208 can be customized according to the actual slot shape requirements. The shape of the mating cutting edge 222 can be rectangular, trapezoidal, arc-shaped, or other irregular structures to adapt to the slot shape requirements of different motor stator and rotor laminations. The mating accuracy between the integrated grooving tool 219 and the mating cutting edge 222 directly affects the grooving quality, therefore the machining accuracy of both needs to be strictly controlled.

[0047] In other embodiments, the drive beam 216 can be driven manually, electrically, or pneumatically. Manual drive is suitable for small-batch production or mold debugging stages, while electric or pneumatic drive is suitable for large-batch continuous production, enabling automated control and further improving production efficiency.

[0048] In other embodiments, the rotary motor 404 may be a servo motor or a stepper motor to achieve more precise angle control. An angle sensor may also be installed on the rotary positioning column 405 to detect the rotation angle of the lamination in real time and feed the signal back to the control system to ensure that the processing position of each sector is accurate.

[0049] In other embodiments, the pressure cover 305 of the clamping assembly 3 can be designed as a replaceable structure, with different specifications of pressure covers configured for punches of different inner diameters, so as to improve the versatility and applicability of the device.

[0050] In this invention, unless otherwise explicitly 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," "over," and "on top" of 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.

[0051] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. 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 any suitable manner in 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.

[0052] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A continuous grooving device for large stator and rotor laminations of different slot types for high-efficiency motors, comprising a grooving machine (1), characterized in that: A transverse mold changing assembly (2) is provided below the output shaft of the grooving machine (1). The transverse mold changing assembly (2) includes a multi-station mounting frame (223) fixedly mounted on the output shaft of the grooving machine (1). The bottom of the multi-station mounting frame (223) is fixedly connected to an upper mounting seat (201). A lower mounting seat (209) is provided below the upper mounting seat (201). Guide slots (215) are provided at the top of the lower mounting seat (209) and the bottom of the upper mounting seat (201). A drive beam (216) is slidably mounted on the lower mounting seat (209). A linkage pin (217) is provided on the drive beam (216). The linkage pin (217) can move along the vertical direction of the drive beam (216). Multiple grooving mold units are provided on one side of the drive beam (216), and each grooving mold unit has a different shape of cutting tool and slot.

2. The continuous slotting device for large stator and rotor laminations of high-efficiency motors with different slot types according to claim 1, characterized in that, The punching die unit includes a lower die mounting plate (207) slidably mounted on the lower mounting base (209). The lower die mounting plate (207) has a mating groove (218). The linkage pin (217) on the drive beam (216) is inserted into the mating groove (218) on the lower die mounting plate (207). A concave template (208) is fixedly connected to the lower die mounting plate (207). The concave template (208) has a mating cutting edge (222).

3. The continuous slotting device for large stator and rotor laminations of high-efficiency motors with different slot types according to claim 2, characterized in that, Guide telescopic column (204) is fixedly connected to the lower mold mounting plate (207) on one side of the concave template (208). The telescopic end of the guide telescopic column (204) is fitted with a telescopic spring. The top of the guide telescopic column (204) is fixedly connected to the upper mold mounting plate (202). The top of the upper mold mounting plate (202) and the bottom of the lower mold mounting plate (207) are both provided with snap-fit ​​protrusions (214) that cooperate with the guide slot (215).

4. The continuous slotting device for large stator and rotor laminations of high-efficiency motors with different slot types according to claim 3, characterized in that, The upper mold mounting plate (202) is fixedly connected to the upper template (203) at the bottom. The upper template (203) is fixedly connected to the bottom of the integrated grooving cutter (219). Guide posts (206) are movably arranged at the bottom ends of the upper template (203) on both sides of the integrated grooving cutter (219). A telescopic spring is sleeved on the guide post (206). The guide post (206) is slidably connected to the upper template (203) in the vertical direction of the bottom surface of the upper template (203). The bottom of the guide post (206) is fixedly connected to the stripper plate (205). A cutter through groove (220) is opened on the stripper plate (205). The cutter through groove (220) is correspondingly matched with the integrated grooving cutter (219).

5. The continuous slotting device for large stator and rotor laminations of high-efficiency motors with different slot types according to claim 4, characterized in that, The transverse mold changing assembly (2) also includes a positioning mechanism, which includes positioning slots (213) on both sides of the top of the upper mold mounting plate (202). The upper mounting base (201) also has a positioning slot (213) on the side near the upper mold mounting plate (202). The cross-section of the positioning slots (213) is semi-circular. When the upper mold mounting plate (202) and the upper mounting base (201) are aligned, the two semi-circular positioning slots form a circular positioning slot.

6. The continuous slotting device for large stator and rotor laminations of high-efficiency motors with different slot types according to claim 5, characterized in that, The multi-station mounting bracket (223) has cylinders (210) fixedly connected to both sides of the mounting bracket (223). The telescopic end of the cylinder (210) is fixedly connected to the linkage rod (211). The bottom end of the linkage rod (211) is fixedly connected to the limiting post (212) near the upper mold mounting plate (202). The limiting post (212) is correspondingly engaged with the positioning slot (213).

7. The continuous slotting device for large stator and rotor laminations of high-efficiency motors with different slot types according to claim 1, characterized in that, Waste outlet (221) is provided on the lower mounting base (209) below the multi-station mounting frame (223).

8. The continuous slotting device for large stator and rotor laminations of different slot types for high-efficiency motors according to claim 1, characterized in that, The grooving machine (1) is slidably connected to a clamping assembly (3) on its side wall. The clamping assembly (3) includes a mounting arm (301) slidably connected to the side wall of the grooving machine (1). The end of the mounting arm (301) is fixedly connected to a mounting rod (302). One side of the mounting rod (302) is fixedly connected to a lifting drive rod (303). The telescopic end of the lifting drive rod (303) is fixedly connected to a support frame (304). A drive motor (307) is fixedly connected to the support frame (304). The output shaft end of the drive motor (307) is fixedly connected to a pressure cover (305). A mating groove (306) is provided at the bottom end of the pressure cover (305).

9. A continuous slotting device for large stator and rotor laminations of different slot types for high-efficiency motors according to claim 8, characterized in that, A feeding assembly (4) is provided on one side of the grooving machine (1). The feeding assembly (4) includes an expansion table (401). A moving groove (407) is opened on the expansion table (401). A lead screw (403) is rotatably connected in the moving groove (407). A moving seat (402) is threaded on the lead screw (403). A rotating motor (404) is fixedly connected to the moving seat (402). A rotating positioning column (405) is fixedly connected to the end of the output shaft of the rotating motor (404). Guide rods (406) are fixedly connected to the top of the expansion table (401) on both sides of the moving groove (407). The upper sides of the moving seat (402) are slidably connected to the guide rods (406). The mating groove (306) is correspondingly mated with the rotating positioning column (405) on the feeding assembly (4).

10. A continuous slotting device for large stator and rotor laminations of different slot types for high-efficiency motors according to claim 9, characterized in that, The rotating positioning post (405) has a raised structure on its side for engaging with the process groove on the inner ring of the lamination.

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