Single-station multi-cutting-edge automatic switching die for high-efficiency motor stator and rotor slotting

Abstract

This invention discloses a high-efficiency single-station multi-blade automatic switching mold for stamping motor stators and rotors, relating to the field of motor stator and rotor stamping processing technology. It includes a multi-blade switching mold with an upper mold base connected to the bottom of a mold base plate. The upper mold base is equipped with a tool changing drive assembly. The tool changing drive assembly includes a cylinder, a drive column, a drive slider, and an ejector protrusion. A punch fixing plate is connected to the bottom of the upper mold base, on which a rotor stamping blade, a stator stamping blade, and a separation cutting blade are slidably mounted. A stripper plate is located below the punch fixing plate, and a lower mold base and a concave plate are located below the stripper plate. This application achieves automatic switching and selective limiting of the three types of tools through a cylinder-driven tool changing assembly, completing rotor stamping, stator stamping, and separation cutting at the same station. This mold can achieve continuous stamping processing of the stator and rotor in a single positioning, ensuring coaxiality accuracy, reducing equipment footprint, improving automation level, and is suitable for processing various types of laminations such as conical motors.

Description

Technical Field

[0001] This invention relates to the field of motor stator and rotor slotting technology, specifically a high-efficiency single-station multi-cutting-blade automatic switching mold for motor stator and rotor slotting. Background Technology

[0002] Electric motors are key components widely used in modern industry. The stator and rotor, as core components, directly affect the overall performance of the motor due to their machining quality. In the motor manufacturing process, the stator and rotor slotting process is a crucial step. By punching specific shaped slots into the stator and rotor laminations, the magnetic circuit structure of the stator and rotor is formed.

[0003] Traditional stator and rotor slotting dies are typically equipped with only a single type of cutting tool. During stator and rotor slotting in motor manufacturing, after the rotor slotting is completed, the laminations need to be removed from the positioning fixture and transferred to another dedicated station for stator slotting. This multi-station, multi-step processing method is not only cumbersome and inefficient, but also prone to positioning errors due to the strict coaxiality requirements of the stator and rotor during final motor assembly. This results in insufficient coaxiality between the processed stator and rotor, affecting the manufacturing quality of the subsequent motor. Furthermore, setting up multiple processing stations requires significant factory space and increases equipment investment and die replacement costs. Therefore, achieving continuous slotting of the stator and rotor under single-station conditions, reducing the number of positioning operations, and improving processing accuracy and efficiency has become a pressing technical problem in the motor manufacturing industry. Summary of the Invention

[0004] This invention addresses the shortcomings of existing motor stator and rotor slotting processing technology by providing a high-efficiency single-station multi-cutting-blade automatic switching mold for motor stator and rotor slotting.

[0005] Traditional stator and rotor slotting dies are typically equipped with only a single type of cutting tool. During stator and rotor slotting in motor machining, after the rotor slotting is completed, the laminations need to be removed from the positioning fixture and transferred to another dedicated station for stator slotting. This multi-station, multi-step machining method is cumbersome and inefficient. Furthermore, because the stator and rotor require strict coaxiality during final motor assembly, frequent changes in clamping stations can easily cause positioning errors, resulting in insufficient coaxiality between the processed stator and rotor, thus affecting the manufacturing quality of the subsequent motor. In addition, setting up multiple machining stations requires significant factory space and increases equipment investment and die replacement costs.

[0006] To address this, the present invention provides a single-station multi-blade automatic switching mold for high-efficiency motor stator and rotor slotting, comprising a multi-blade switching mold. The multi-blade switching mold includes a mold base plate, with an upper mold base fixedly connected to the bottom of the mold base plate. A drive groove is formed on the upper mold base, and a tool changing drive assembly is disposed within the drive groove. The tool changing drive assembly includes a cylinder fixedly disposed on one side of the upper mold base. A drive column is fixedly connected to the drive end of the cylinder. A drive slider is slidably disposed within the drive groove on one side of the drive column. A slot is formed at the end of the drive slider near the drive column. The end of the drive column is disposed within the slot and engages with the drive slider through the slot. A top cutter protrusion is fixedly connected to the bottom end of the drive slider away from the cylinder. A first transmission rod and a second transmission rod are slidably disposed through the upper mold base below the drive slider. The bottom of the upper die base is fixedly connected to a punch fixing plate. A rotor grooving cutter, a stator grooving cutter, and a separating cutter are slidably disposed through the punch fixing plate. The separating cutter is fixedly connected to the stator grooving cutter and is located on one side of the middle region between the stator grooving cutter and the rotor grooving cutter. A first transmission connecting groove and a second transmission connecting groove are respectively formed at the top of the punch fixing plate. The top of the rotor grooving cutter extends into the first transmission connecting groove, and the bottom of the first transmission rod extends into the first transmission connecting groove and is fixedly connected to the rotor grooving cutter. The tops of the stator grooving cutter and the separating cutter extend into the second transmission connecting groove, and the bottom of the second transmission rod extends into the second transmission connecting groove and is fixedly connected to the stator grooving cutter and the separating cutter.

[0007] Furthermore, a stripper plate is provided below the punch fixing plate. A first through groove and a second through groove are respectively formed on the stripper plate. A cutting through groove is formed on the stripper plate between the first through groove and the second through groove, and the cutting through groove communicates with the first through groove. The first through groove and the cutting through groove are respectively configured to cooperate with the stator punching cutter and the separation cutting cutter, and the second through groove is configured to cooperate with the rotor punching cutter.

[0008] Furthermore, guide posts are fixedly connected to both ends of the top of the unloading plate. A guide groove is formed at the bottom end of the punch fixing plate above the guide posts. The top end of the guide posts is slidably disposed in the guide groove. A telescopic spring is fixedly connected to the top of the guide groove, and the bottom of the telescopic spring is fixedly connected to the top of the guide post. Mounting posts are movably disposed at both ends of the bottom of the punch fixing plate, and the bottom ends of the mounting posts are fixedly connected to the unloading plate by bolts.

[0009] Furthermore, a lower die base is provided below the unloading plate, and a concave template is fixedly connected to the lower die base. A rotor cutter edge and a stator cutter edge are provided on the concave template. The rotor cutter edge and the stator cutter edge are respectively provided to cooperate with the rotor punching cutter and the stator punching cutter above. A discharge port is provided on the lower die base, and the discharge port is provided to correspond with the rotor cutter edge and the stator cutter edge.

[0010] Furthermore, a limiting sleeve is fixedly connected to the bottom of the upper mold base on both sides of the cylinder, and a telescopic guide post is fixedly connected to the lower mold base below the limiting sleeve. An elastic element is sleeved on the telescopic end of the telescopic guide post, and the upper end of the telescopic guide post extends into the limiting sleeve and engages with the limiting sleeve.

[0011] Furthermore, the separating cutter is a linear cutter with an inclined surface.

[0012] Furthermore, the present invention also provides a machine tool using the above-mentioned high-efficiency motor stator and rotor grooving single-station multi-cutting-edge automatic switching mold, including a machine tool body, the output shaft end of the machine tool body being fixedly connected to the mold base plate, and the lower mold base at the bottom of the multi-cutting-edge switching mold being fixedly installed and connected to the processing position of the machine tool. A positioning and feeding assembly is provided on one side of the machine tool, the positioning and feeding assembly including a feeding table, a telescopic feeding seat being provided on the feeding table, a telescopic arm being fixedly connected to the telescopic end of the telescopic feeding seat, and the end of the telescopic arm extending to the position of the multi-cutting-edge switching mold. A limiting rotating column is rotatably connected to the top of one end of the telescopic arm, and a feeding motor is fixedly connected to the bottom of the telescopic arm below the rotating shaft of the limiting rotating column, the output shaft end of the feeding motor being fixedly connected to the rotating shaft of the limiting rotating column.

[0013] Furthermore, a pressing component is provided on the side wall of the machine tool body above the positioning and feeding component. The pressing component includes a mounting base fixedly mounted on the outer wall of the machine tool body. A lifting drive rod is laterally movably mounted at the bottom end of the mounting base. The telescopic end of the lifting drive rod is fixedly connected to the mounting rod. The bottom end of the mounting rod is rotatably connected to the pressure cover. The pressure cover is configured to cooperate with the limiting rotating column.

[0014] The working principle of this invention is as follows: During the grooving process, the stator and rotor laminations to be processed are placed on the concave template. Under the action of the drive source, the mold base plate drives the rotor grooving cutter, stator grooving cutter, and separation cutter below the upper mold base to move downwards simultaneously. During the downward movement, the stripper plate first contacts the stator and rotor laminations to achieve clamping. Due to the telescopic fit between the stripper plate and the punch fixing plate, multiple cutters above the stripper plate continue to move downwards following the upper mold base and the punch fixing plate. According to the processing sequence, when the rotor area on the lamination is selected to be grooved first, the drive column at the end of the cylinder is in an extended state. The drive slider at the end of the drive column moves under the action of the cylinder, so that the top cutter protrusion at the bottom of the drive slider is directly above the first transmission rod. In this state, when multiple cutters continue to move downwards and contact the laminations, since the first transmission rod above the rotor grooving cutter is limited by the top cutter protrusion, during the continued downward movement, the rotor grooving cutter, in conjunction with the rotor cutter edge, generates a shearing force to cut the lamination, thereby achieving grooving of the rotor area of ​​the lamination. Meanwhile, because the ejector protrusion at the bottom of the drive slider does not correspond to the second transmission rod, when the stator grooving cutter and the separating cutter contact the lamination, as the upper die holder drives the punch fixing plate to continue moving downwards, the stator grooving cutter and the separating cutter cannot continue to move because there is no obstructing ejector protrusion above the second transmission rod, and therefore no shearing force is generated. After the rotor area on the lamination is grooved, the cylinder retracts, causing the drive slider to move laterally, which in turn drives the ejector protrusion at the bottom of the slider to move above the second transmission rod. Then, during subsequent grooving, the stator grooving cutter and the separating cutter simultaneously exert impact cutting force on the lamination. The separating cutter adopts a linear cutter structure with an inclined surface. While grooving the stator area of ​​the lamination, the separating cutter separates and cuts the rotor area from the stator area of ​​the lamination. The waste generated from grooving flows out from the discharge port through the rotor and stator cutter edges. During the upward repositioning process of the upper die holder, due to the elastic force between the stripper plate and the punch fixing plate, the stripper plate remains stationary in the initial stage of the upper die holder's ascent, while the cutting tool rises under the action of the punch fixing plate. The stripper plate can press the punch to achieve reliable unloading, preventing the cutting tool from moving upward and causing the punch to move, thus ensuring accurate positioning during the next punching.

[0015] This invention offers the following advantages: By integrating three types of cutting tools—rotor grooving tool, stator grooving tool, and separation cutter—at the same workstation, and using a cylinder-driven tool changer to achieve automatic tool switching, continuous grooving of the stator and rotor can be achieved with only one positioning operation, greatly simplifying the operation process. Since all grooving processes are completed at the same workstation, the positioning errors caused by multiple positioning operations and frequent changes in clamping stations required in traditional processes are avoided, effectively ensuring the coaxiality accuracy of the stator and rotor and meeting the precision assembly requirements of the subsequent motor stator and rotor. The integration of the three functional cutting tools into the same mold, with automatic tool switching and selective limiting achieved through a cylinder-driven tool changer, reduces manual intervention and improves the automation level of the production line. The single-workstation design reduces the equipment footprint, saves factory space, and avoids the additional equipment investment required for multiple processing stations, reducing equipment investment and operating costs.

[0016] The telescopic feeder allows for adjustment of the front and rear positions of the laminations, accommodating processing needs for laminations of different diameters. It also supports the processing of stators and rotors for conical motors, offering a wider range of applications and greater flexibility. The stripper plate and punch fixing plate utilize an elastic connection structure. During the upward resetting process of the upper die holder, the stripper plate presses down on the laminations for reliable unloading, preventing the cutting tool from moving the laminations and ensuring precise positioning during the next slotting operation. Attached Figure Description

[0017] Figure 1 A schematic diagram of a single-station multi-cutting-edge automatic switching die for stamping stators and rotors of high-efficiency electric motors. Figure 1 .

[0018] Figure 2 A schematic diagram of a single-station multi-cutting-edge automatic switching die for stamping stators and rotors of high-efficiency electric motors. Figure 2 .

[0019] Figure 3 A schematic diagram of a single-station multi-cutting-edge automatic switching die for stamping stators and rotors of high-efficiency electric motors. Figure 3 .

[0020] Figure 4 A schematic diagram of a single-station multi-cutting-edge automatic switching die for stamping stators and rotors of high-efficiency electric motors. Figure 4 .

[0021] Figure 5 A schematic diagram of a single-station multi-cutting-edge automatic switching die for stamping stators and rotors of high-efficiency electric motors. Figure 5 .

[0022] Figure 6 A schematic diagram of a single-station multi-cutting-edge automatic switching die for stamping stators and rotors of high-efficiency electric motors. Figure 6 .

[0023] Figure 7 This is a schematic diagram of a split structure for a single-station multi-cutting-blade automatic switching mold used for stamping stators and rotors of high-efficiency motors.

[0024] Figure 8 This is a schematic diagram of the split-type side structure of a single-station multi-cutting-blade automatic switching mold for stamping stators and rotors of high-efficiency motors.

[0025] Figure 9 This is a schematic diagram of a single-station multi-cutting-blade automatic switching mold for punching stators and rotors of high-efficiency motors, mounted on a machine tool.

[0026] Figure 10 This is a schematic diagram from another perspective of the installation of a single-station multi-cutting-blade automatic switching mold for high-efficiency motor stator and rotor slotting on a machine tool.

[0027] Figure 11 This is a cross-sectional schematic diagram of a single-station multi-cutting-blade automatic switching mold for stamping stators and rotors of high-efficiency motors.

[0028] In the diagram: 1. Machine tool body; 2. Positioning and feeding assembly; 201. Feeding table; 202. Telescopic feeding seat; 203. Telescopic arm; 204. Limiting rotating column; 205. Feeding motor; 3. Multi-blade switching mold; 301. Mold base plate; 302. Upper mold base; 303. Punch fixing plate; 304. Stripper plate; 305. Lower mold base; 306. Concave mold plate; 307. Limiting sleeve; 308. Telescopic guide column; 309. Elastic element; 310. Cylinder; 311. Rotor grooving cutter; 312. Stator grooving cutter; 313. Separating and cutting cutter; 314. Drive. 315. Drive slider; 316. First transmission rod; 317. Second transmission rod; 318. Rotor knife edge; 319. Stator knife edge; 320. Discharge port; 321. First through slot; 322. Second through slot; 323. Cutting through slot; 324. Guide post; 325. Mounting post; 326. Guide groove; 327. Slot; 328. Top knife protrusion; 329. Drive post; 330. First transmission connection groove; 331. Second transmission connection groove; 4. Pressing assembly; 401. Mounting base; 402. Lifting drive rod; 403. Mounting rod; 404. Press cover. Detailed Implementation

[0029] 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.

[0030] like Figures 1 to 11As shown in the figure, a single-station multi-blade automatic switching mold for high-efficiency motor stator and rotor slotting according to an embodiment of the present invention includes a multi-blade switching mold 3. This multi-blade switching mold 3 is the core component of the entire mold system, and its specific structure is described below. The multi-blade switching mold 3 includes a mold base plate 301, which serves as the base and mounting platform of the entire mold system. Its bottom is fixedly connected to the upper mold base 302 by bolts, achieving a stable assembly. The upper mold base 302 has a drive groove 314 extending along its length. A tool changing drive assembly is disposed inside the drive groove 314, which is one of the key innovative structures of the present invention, used to achieve automatic switching between different tools.

[0031] The tool changer drive assembly includes a cylinder 310 fixedly mounted on one side of the upper die holder 302. The cylinder 310 is bolted to the side wall of the upper die holder 302, and a sealing gasket is provided between the cylinder body of the cylinder 310 and the upper die holder 302 to ensure airtightness during operation. A drive column 329 is fixedly connected to the drive end of the cylinder 310. The drive column 329 is a rigid metal rod, one end of which is fixed to the piston rod of the cylinder 310 via a threaded connection or a snap-fit ​​connection, and the other end extends into the drive groove 314. A drive slider 315 is slidably mounted in the drive groove 314 on one side of the drive column 329. The cross-sectional shape of the drive slider 315 matches the internal shape of the drive groove 314, allowing it to slide smoothly left and right within the drive groove 314. A slot 327 is provided at one end of the drive slider 315 near the drive column 329. The shape of the slot 327 matches the end shape of the drive column 329. The end of the drive column 329 is located in the slot 327 and engages with the drive slider 315 through the slot 327. This engagement structure allows the drive column 329 to drive the drive slider 315 to move synchronously during its extension and retraction. A push-die protrusion 328 is fixedly connected to the bottom end of the drive slider 315 away from the cylinder 310. The push-die protrusion 328 is a metal block protruding from the bottom surface of the drive slider 315. Its position and size are precisely designed to form a precise limiting engagement with the transmission rod below. A first transmission rod 316 and a second transmission rod 317 are slidably connected through the upper mold base 302 below the drive slider 315. These two transmission rods are arranged in parallel and can slide vertically on the upper mold base 302. Their sliding stroke is limited and controlled by the push-die protrusion 328 located above them.

[0032] A punch fixing plate 303 is fixedly connected to the bottom of the upper die holder 302. Three different cutting tools are slidably mounted on the punch fixing plate 303: a rotor slotting tool 311, a stator slotting tool 312, and a separating cut-off tool 313. The rotor slotting tool 311, stator slotting tool 312, and separating cut-off tool 313 are all made of high-hardness alloy material, possessing excellent wear resistance and service life. The separating cut-off tool 313 is fixedly connected to the stator slotting tool 312 by welding or bolting, forming a single tool assembly. The separating cut-off tool 313 is located on one side of the area between the stator slotting tool 312 and the rotor slotting tool 311; its specific spatial position needs to be precisely designed and adjusted according to the structural dimensions of the lamination. The top of the punch fixing plate 303 has a first transmission connection groove 330 and a second transmission connection groove 331, which are used to connect to different cutting tools and transmission rods, respectively. The top end of the rotor grooving cutter 311 extends into the first transmission connecting groove 330. The rotor grooving cutter 311 and the first transmission connecting groove 330 are connected by a clearance fit, which ensures a stable connection between the two while allowing the rotor grooving cutter 311 to slide vertically within a certain range on the punch fixing plate 303. The bottom end of the first transmission rod 316 extends into the first transmission connecting groove 330 and is fixedly connected to the rotor grooving cutter 311 by a key connection or a slot connection. When the top end of the first transmission rod 316 corresponds to the ejector protrusion 328, the punch fixing plate 303 drives the rotor grooving cutter 311 to move downward synchronously. When the rotor grooving cutter 311 contacts the blank to be grooved, the rotor grooving cutter 311 cannot move upward because it is limited by the ejector protrusion 328, thus enabling the grooving operation of the blank to be grooved.

[0033] The top ends of the stator grooving cutter 312 and the separating cutter 313 extend into the second transmission connecting groove 331. The connecting fixing plate between the stator grooving cutter 312 and the separating cutter 313 and the punch fixing plate 303 also adopt a clearance fit, allowing the stator grooving cutter 312 and the separating cutter 313 to slide vertically on the punch fixing plate 303. The bottom end of the second transmission rod 317 extends into the second transmission connecting groove 331 and is fixedly connected to the stator punching cutter 312 and the separating cutter 313 via a connecting plate. When the second transmission rod 317 is limited by the top cutter protrusion 328, during the punching operation, the stator punching cutter 312 and the separating cutter 313, under the limiting action of the top cutter protrusion 328, move down with the punch fixing plate 303, and can synchronously drive the stator punching cutter 312 and the separating cutter 313 to contact the punching piece to be punched to achieve punching. The above process achieves synchronous limiting control of the two tools, and thus achieves continuous punching of multiple different groove types through one positioning, without the need to adjust the position of the large punching piece, improving work efficiency and punching accuracy.

[0034] A stripper plate 304 is provided below the punch fixing plate 303. The stripper plate 304 plays a key role in pressing and unloading the punch during the stamping process. The stripper plate 304 has a first through groove 321 and a second through groove 322, which correspond to the positions of the stator slotting cutter 312 and the rotor slotting cutter 311, respectively, so that the cutters can pass smoothly through the stripper plate 304 and cooperate with the lower concave template 306 to perform stamping operations. A cutting through groove 323 is provided on the stripper plate 304 between the first through groove 321 and the second through groove 322. The cutting through groove 323 communicates with the first through groove 321. The width and shape of the cutting through groove 323 match the cutting edge shape of the separating cutting cutter 313, so that the separating cutting cutter 313 can pass smoothly through the cutting through groove 323 to separate and cut the punch during stamping. Guide posts 324 are fixedly connected to the two corners of the top of the unloading plate 304. The guide posts 324 are two cylindrical metal rods, which are respectively set at the two corners of the unloading plate 304. Their function is to guide the up and down movement of the unloading plate 304, ensuring that the unloading plate 304 remains horizontal throughout the movement and avoiding tilting or deviation.

[0035] A guide groove 326 is provided at the bottom end of the punch fixing plate 303 above the guide post 324. The shape of the guide groove 326 matches the cross-sectional shape of the guide post 324. The top end of the guide post 324 is slidably disposed in the guide groove 326. This sliding fit allows the guide post 324 to slide smoothly up and down within the guide groove 326. A telescopic spring is fixedly connected to the top of the guide groove 326. The elastic force of the telescopic spring needs to be precisely calculated and selected according to the requirements of the stamping force and the unloading force. The bottom of the telescopic spring is fixedly connected to the top of the guide post 324. The setting of the telescopic spring creates an elastic connection between the unloading plate 304 and the punch fixing plate 303, allowing a certain relative displacement between the two during the stamping process. This enables the unloading plate 304 to first press the stamping sheet, and then the cutting tool to continue to move down for stamping. Mounting posts 325 are movably provided at both ends of the bottom of the punch fixing plate 303. The mounting posts 325 are fixedly connected to the stripper plate 304 by bolts. The mounting posts 325 and the punch fixing plate 303 are also connected vertically to ensure that the stripper plate 304 can slide vertically up and down relative to the punch fixing plate 303.

[0036] A lower die holder 305 is located below the stripper plate 304. The lower die holder 305 serves as the lower fixed part of the entire die system, cooperating with the upper die holder 302 to form a complete stamping die cavity. A concave die plate 306 is fixedly connected to the lower die holder 305. The concave die plate 306 is made of high-strength alloy tool steel, and its surface has undergone quenching and tempering treatment, resulting in high hardness and good wear resistance. The concave die plate 306 has rotor cutters 318 and stator cutters 319, which correspond to and cooperate with the upper rotor slotting cutter 311 and stator slotting cutter 312, respectively. The shape and size of the rotor cutters 318 and stator cutters 319 are determined according to the design requirements of the motor's rotor and stator. The lower die holder 305 is provided with a discharge port 320, which is correspondingly set with the rotor cutter 318 and the stator cutter 319. The waste generated during the stamping process can pass through the rotor cutter 318 and the stator cutter 319 and flow out from the discharge port 320, realizing automatic waste cleaning.

[0037] Limiting sleeves 307 are fixedly connected to the bottom of the upper die bases 302 on both sides of the cylinder 310. The limiting sleeves 307 are hollow cylindrical structures with their axes parallel to the stamping direction of the upper die bases 302. A telescopic guide post 308 is fixedly connected to the lower die base 305 below the limiting sleeves 307. An elastic element 309 is sleeved on the telescopic end of the telescopic guide post 308. This elastic element 309 is typically a compression spring or a nitrogen spring, and its elastic force needs to be selected according to the mold's reset force and guiding force requirements. The upper end of the telescopic guide post 308 extends into the limiting sleeve 307 and engages with it. When the upper die base 302 descends to its lowest position, the telescopic guide post 308 is completely retracted into the limiting sleeve 307. At this time, the elastic element 309 is in its maximum compressed state, and the stored elastic force is used to drive the upper die base 302 to reset after stamping.

[0038] In this invention, the separating cutter 313 employs a linear cutter structure with an inclined surface. This design allows the separating cutter 313 to separate the laminations at an angle during stamping, rather than through direct vertical cutting. The inclined cutting edge reduces cutting resistance, minimizes burrs and deformation during cutting, and improves cutting quality. Simultaneously, the inclined cutting edge generates a certain axial force during cutting, automatically separating the cut rotor and stator laminations for easier subsequent collection and processing.

[0039] The working process of the mold in actual use according to the embodiment of the present invention is as follows. First, the external positioning device places the stator and rotor laminations to be processed on the concave template 306. Under the action of the external driving source, the mold base plate 301 and the upper mold base 302 move downward relative to the concave template 306. When the upper mold base 302 moves downward, it drives the rotor grooving cutter 311, the stator grooving cutter 312 and the separating cutter 313 below it to move downward simultaneously. In the initial stage of downward movement, the stripper plate 304 first contacts the upper surface of the stator and rotor laminations. Since there is an elastic connection between the stripper plate 304 and the punch fixing plate 303, the stripper plate 304 is blocked by the laminations and stops moving downward. However, the upper mold base 302 and the punch fixing plate 303 continue to move downward under the drive of the output shaft of the machine tool body 1. The telescopic spring is gradually compressed, and the guide post 324 slides downward in the guide groove 326. At the same time, the rotor punching cutter 311, the stator punching cutter 312, and the separation cutter 313 follow the punch fixing plate 303 to continue to descend and gradually approach the surface of the lamination.

[0040] According to the requirements of the processing procedure, the present invention adopts a processing sequence of first slotting the rotor area and then slotting the stator area. When it is necessary to perform slotting operation on the rotor area on the lamination, the drive column 329 at the end of the cylinder 310 is in an extended state. At this time, the drive slider 315 moves to the position furthest away from the cylinder 310 under the push of the cylinder 310, so that the top cutter protrusion 328 at the bottom of the drive slider 315 is directly above the first transmission rod 316. In this state, when the rotor grooving cutter 311, stator grooving cutter 312, and separating cutter 313 continue to move downward and contact the lamination, the first transmission rod 316 above the rotor grooving cutter 311 is blocked and limited by the top cutter protrusion 328, and cannot continue to move downward with the unloading plate 304. Therefore, the rotor grooving cutter 311 extends out from the second through slot 322 on the unloading plate 304 and generates a downward relative displacement relative to the lamination. The cutting edge of the rotor grooving cutter 311 cuts into the rotor area of ​​the lamination and cooperates with the rotor cutter edge 318 on the concave template 306 to generate a shearing force to cut the lamination, thereby realizing the grooving operation on the rotor area of ​​the lamination. At this time, since the pusher protrusion 328 at the bottom of the drive slider 315 does not correspond to the second transmission rod 317, and there is no obstruction or limiting structure above the second transmission rod 317, when the stator punching cutter 312 and the separation cutting cutter 313 contact the lamination, although the punch fixing plate 303 continues to move downward, the second transmission rod 317 can move upward relative to the punch fixing plate 303 along with the stripper plate 304, and will not limit the stator punching cutter 312 and the separation cutting cutter 313. Therefore, the stator punching cutter 312 and the separation cutting cutter 313 cannot generate downward displacement relative to the lamination, and cannot generate shearing force. The stator area and separation cutting operation will not be performed at this time.

[0041] After the rotor area on the lamination is slotted, the cylinder 310 retracts, causing the drive slider 315 to move closer to the cylinder 310. After the drive slider 315 moves, the ejector protrusion 328 at its bottom moves to directly above the second transmission rod 317. In the next stamping cycle, the ejector protrusion 328 limits the second transmission rod 317, allowing it to follow the mechanical movement of the punch fixing plate 303 and continue to descend relative to the stripper plate 304. Therefore, the stator slotting cutter 312 and the separating cutter 313 generate a downward relative displacement relative to the lamination. The cutting edge of the stator slotting cutter 312 cuts into the stator area of ​​the lamination, cooperating with the stator cutting edge 319 on the die plate 306 to generate a slotting shearing force on the stator area of ​​the lamination, thus realizing the slotting operation on the stator area of ​​the lamination. Simultaneously, the separating cutter 313 moves downward in sync with the stator punching cutter 312. The separating cutter 313 is a linear cutter with an inclined surface; its inclined cutting edge cuts into the connection between the rotor and stator regions of the lamination, separating the rotor and stator regions of the lamination by an oblique cut. The cutting force generated by the separating cutter 313 during the cutting process is relatively small, but its cutting stroke is sufficient to completely separate the rotor and stator laminations.

[0042] Throughout the entire stamping process described above, the waste material generated during grooving can pass through the rotor cutter edge 318 and the stator cutter edge 319 and flow out from the discharge port 320 on the lower die holder 305, achieving automatic waste removal and preventing waste from accumulating inside the die and affecting the quality of subsequent stamping operations. When the upper die holder 302 needs to be moved upward and reset, the output axis of the machine tool body 1 moves upward, driving the upper die holder 302 and the punch fixing plate 303 to move upward. At this time, due to the elastic force of the telescopic spring between the stripper plate 304 and the punch fixing plate 303, in the initial stage of the upper die holder 302 rising, the stripper plate 304 remains stationary under the elastic force of the telescopic spring, while the rotor grooving cutter 311, the stator grooving cutter 312, and the separating cutter 313 rise under the drive of the punch fixing plate 303. At this time, the bottom surface of the stripper plate 304 presses against the upper surface of the punch, achieving a reliable unloading function and preventing the punch from moving along with the cutter when it moves upward, ensuring the accurate position of the punch during the next grooving. At the same time, the telescopic guide post 308 pops upward under the elastic force of the elastic element 309 and re-inserts into the limiting sleeve 307, providing guidance and support for the reset movement of the upper mold base 302.

[0043] This invention integrates three cutting tools—rotor grooving tool 311, stator grooving tool 312, and separation cutter 313—at the same workstation. The tool switching is automatically achieved via a cylinder 310 driven by the tool changer assembly. Only one positioning of the laminations is required to perform continuous grooving of the stator and rotor. This single-station design significantly simplifies the operation process, reduces manual intervention, and improves production efficiency. Since all grooving processes are completed at the same workstation, the positioning errors caused by multiple positioning and frequent changes of clamping stations in traditional processes are avoided. This effectively ensures the coaxiality accuracy of the stator and rotor, meeting the precision assembly requirements of the subsequent motor stator and rotor. The single-station design reduces the equipment footprint, saving factory space and avoiding the additional equipment investment required for multiple processing stations, thus reducing equipment investment and operating costs. The three functional cutting tools are integrated into the same mold, and the cylinder-driven tool changer assembly achieves automatic tool switching and selective limiting, reducing manual intervention and improving the automation level of the production line. The stripper plate 304 and the punch fixing plate 303 adopt an elastic connection structure. During the process of the upper die holder 302 rising and resetting, the stripper plate 304 can press the punch to achieve reliable unloading, prevent the tool from moving upward and causing the punch to move, and ensure accurate positioning during the next punching.

[0044] This invention also provides a machine tool using the aforementioned high-efficiency motor stator and rotor slotting single-station multi-blade automatic switching die. This machine tool integrates the multi-blade switching die 3 with an automated feeding system and a pressing system, achieving fully automated processing of motor stator and rotor slotting. The machine tool includes a machine body 1, with the output shaft end of the machine body 1 fixedly connected to a die base plate 301. The machine body 1 drives the multi-blade switching die 3 to perform stamping operations through the reciprocating motion of its output shaft. The lower die base 305 at the bottom of the multi-blade switching die 3 is fixedly installed and connected to the processing position of the machine body 1 via a positioning key and a pressure plate, ensuring the positional accuracy of the lower die base 305 on the machine body 1.

[0045] A positioning and feeding assembly 2 is provided on one side of the machine tool body 1. This assembly is used to precisely feed the blanks to be processed to the processing position of the die. The positioning and feeding assembly 2 includes a feeding table 201, which is fixedly installed on the side of the machine tool body 1. A telescopic feeding seat 202 is provided on the feeding table 201. A telescopic arm 203 is fixedly connected to the telescopic end of the telescopic feeding seat 202. The telescopic arm 203 is a rigid metal rod, one end of which is fixedly connected to the telescopic end of the telescopic feeding seat 202. The end of the telescopic arm 203 extends to the position of the multi-cutting-edge switching die 3. The telescopic arm 203 can move back and forth under the drive of the telescopic feeding seat 202, thereby adjusting the front and rear position of the blanks relative to the die to adapt to the processing requirements of blanks with different diameters and sizes. One end of the telescopic arm 203 is rotatably connected to a limiting rotating column 204. A feeding motor 205 is fixedly connected to the bottom of the telescopic arm 203 below the rotating shaft of the limiting rotating column 204. The output shaft of the feeding motor 205 is fixedly connected to the rotating shaft of the limiting rotating column 204, allowing the feeding motor 205 to drive the limiting rotating column 204 to rotate. Since the lamination is mounted on the limiting rotating column 204, it rotates along with the column. During the grooving process, the feeding motor 205 controls the lamination to rotate intermittently with coaxiality. After each set angle of rotation, the grooving operation is performed, thus punching out annularly distributed slots on the lamination. The telescopic feeding seat 202 allows adjustment of the lamination's front and rear positions to accommodate laminations of different diameters. It supports the processing of stators and rotors for conical motors, offering wider applicability and greater flexibility.

[0046] A pressing assembly 4 is provided on the side wall of the machine tool body 1 above the positioning and feeding assembly 2. This pressing assembly 4 is used to press the punch sheet during the stamping process to prevent the punch sheet from moving or deforming during stamping. The pressing assembly 4 includes a mounting base 401 fixedly mounted on the outer wall of the machine tool body 1. The mounting base 401 is fixed to the side wall of the machine tool body 1 by bolts. A lifting drive rod 402 is laterally movably mounted at the bottom end of the mounting base 401. The lifting drive rod 402 realizes lateral extension and retraction movement by means of a hydraulic cylinder. The telescopic end of the lifting drive rod 402 is fixedly connected to the mounting rod 403. The bottom end of the mounting rod 403 is rotatably connected to the pressure cover 404. The pressure cover 404 is configured to cooperate with the limiting rotating column 204. The pressure cover 404 is cylindrical in shape, and its inner diameter matches the outer diameter of the limiting rotating column 204. The pressure cover 404 is sleeved on the outside of the limiting rotating column 204. During stamping, it can press the edge of the stamping piece tightly onto the concave template 306 to ensure the positioning accuracy of the stamping piece.

[0047] During the grooving process in the rotor area, the feeding motor 205 drives the limiting rotating column 204 to rotate intermittently. After each set angle of rotation, the machine tool body 1 drives the die to perform a stamping operation, punching out the first rotor slot on the lamination. When all the slots in the rotor area are punched, the cylinder 310 retracts to change the tool. At this time, the top tool protrusion 328 switches to limit the second transmission rod 317. The feeding motor 205 continues to drive the limiting rotating column 204 and the lamination to rotate intermittently. While the stator area is being grooved, the separating cutter 313 separates and cuts the rotor and stator laminations. Since the separating cutter 313 is located on one side of the stator grooving cutter 312 and adopts a beveled cutting edge design, its cutting position is located at the weak point of the connection between the rotor and stator areas, resulting in low cutting resistance and good cutting quality. After the separation and cutting are completed, the rotor blades and stator blades are automatically separated. The rotor blades fall into the collection device through the discharge port 320, while the stator blades are unloaded by the discharge plate 304 and then transported to the next station by the telescopic arm 203.

[0048] In practical use, the positioning and feeding assembly 2 of this embodiment uses a telescopic feeding seat 202 driven by a motor and a lead screw to move the telescopic arm 203 back and forth. The telescopic stroke is determined according to the maximum and minimum diameters of the blank to be processed, and is typically designed to be 100 to 300 mm. The back-and-forth position adjustment of the telescopic arm 203 matches the diameter of the blank. When processing blanks with larger diameters, the telescopic arm 203 extends more, aligning the center of the blank with the center of the die; when processing blanks with smaller diameters, the telescopic arm 203 retracts less, similarly ensuring the alignment accuracy between the center of the blank and the center of the die. A positioning block and a limit sensor are provided on the limiting rotating column 204. The positioning block is used to accurately position the blank at each stamping position, and the limit sensor is used to detect the rotation angle and position of the blank and feed the signal back to the control system to achieve precise control of the stamping position.

[0049] In practical use, the pressing assembly 4 of this embodiment is driven by a hydraulic cylinder or a pneumatic cylinder. Before the stamping begins, the lifting drive rod 402 extends, pushing the mounting rod 403 and the pressing cover 404 downwards. The pressing cover 404 is fitted onto the outside of the limiting rotating column 204 and presses the edge of the stamping piece. A gap of 0.5 to 1 mm is maintained between the lower end face of the pressing cover 404 and the upper surface of the concave template 306. This gap is necessary to ensure that the pressing cover 404 can effectively press the stamping piece while avoiding interference between the pressing cover 404 and the concave template 306. After the stamping is completed, the lifting drive rod 402 retracts, and the pressing cover 404 rises accordingly. At this time, the telescopic arm 203 can drive the stamping piece to the next position for rotation and stamping. The pressure cover 404 and the limiting rotating column 204 are fitted with a clearance. The inner diameter of the pressure cover 404 is slightly larger than the outer diameter of the limiting rotating column 204. The clearance is designed to be 0.2 to 0.5 mm, which ensures that the pressure cover 404 can be smoothly fitted onto the outside of the limiting rotating column 204, and can effectively press and limit the edge of the punch.

[0050] In this embodiment of the invention, the guiding accuracy between the upper die holder 302 and the lower die holder 305 is achieved through the cooperation of the telescopic guide post 308 and the limiting sleeve 307. The outer diameter of the telescopic guide post 308 and the inner diameter of the limiting sleeve 307 are engaged. When the upper die holder 302 moves downwards, the telescopic guide post 308 and the limiting sleeve 307 guide the movement of the upper die holder 302, ensuring that the upper die holder 302 maintains precise vertical movement throughout its entire stroke. The elastic element 309 is a compression spring, and its elastic force is calculated and determined based on the weight of the die and the reset requirements. The elastic element 309 not only provides the reset power for the upper die holder 302 but also absorbs impact energy during the stamping process, reducing vibration and noise.

[0051] In practical use, the elastic connection structure between the stripper plate 304 and the punch fixing plate 303 in this embodiment of the invention directly affects the smoothness of the movement of the stripper plate 304 due to the sliding fit accuracy of the guide post 324 within the guide groove 326. A clearance fit is used between the outer diameter of the guide post 324 and the width of the guide groove 326. This fit ensures smooth sliding of the guide post 324 within the guide groove 326 while effectively preventing the stripper plate 304 from tilting or shifting during movement. A telescopic spring is located at the top of the guide groove 326, with one end fixedly connected to the top wall of the guide groove 326 and the other end fixedly connected to the top of the guide post 324. When the upper die holder 302 moves downward, the guide post 324 moves downward along with the punch fixing plate 303, and the telescopic spring is gradually compressed. When the upper die holder 302 moves upward, the elastic force of the telescopic spring pulls the guide post 324 upward, thereby causing the stripper plate 304 to move upward.

[0052] In this embodiment of the invention, the tool changing drive assembly uses the reciprocating motion of cylinder 310 to drive the slider 315 to move left and right, thereby achieving alternating limiting of the first transmission rod 316 and the second transmission rod 317 by the top tool protrusion 328. The stroke of cylinder 310 is determined based on the center distance between the first transmission rod 316 and the second transmission rod 317. The thrust and pull of cylinder 310 need to be calculated and selected based on the weight of the drive slider 315 and the limiting resistance of the transmission rods to ensure that cylinder 310 can complete the tool changing action quickly and accurately. The drive slider 315 and the drive groove 314 adopt a linear guide pair to ensure the motion accuracy of the drive slider 315 during left and right movement. The fit between the slot 327 and the end of the drive post 329 adopts a clearance fit to ensure smooth engagement and disengagement while ensuring reliable power transmission. The positional accuracy of the top cutter protrusion 328 is ensured through precision machining and adjustment. The gap between the lower end face of the top cutter protrusion 328 and the upper end face of the first transmission rod 316 and the second transmission rod 317 is designed to be 0.1 to 0.3 mm. This gap is designed to ensure that the top cutter protrusion 328 can smoothly limit the transmission rod, while avoiding the impact on tool changing accuracy due to excessive gap.

[0053] The dimensions and shapes of the first transmission connecting groove 330 and the second transmission connecting groove 331 on the punch fixing plate 303 of this embodiment are designed according to the structural and motion requirements of the rotor grooving cutter 311, the stator grooving cutter 312, and the separating cutter 313. The width of the first transmission connecting groove 330 is slightly larger than the diameter of the first transmission rod 316, and the depth is determined according to the sliding stroke of the first transmission rod 316. The width of the second transmission connecting groove 331 is slightly larger than the diameter of the second transmission rod 317, and the depth is determined according to the sliding stroke of the second transmission rod 317. Since the second transmission connecting groove 331 needs to accommodate the top ends of both the stator grooving cutter 312 and the separating cutter 313, the designed width and depth of the second transmission connecting groove 331 are both larger than those of the first transmission connecting groove 330. The rotor grooving cutter 311, stator grooving cutter 312, and separation cutter 313 are fitted with the punch fixing plate 303 in the form of a sliding fit. The fit clearance is designed to be 0.02 to 0.05 mm. This clearance is necessary to ensure that the cutter can slide smoothly on the punch fixing plate 303 and to ensure the coaxiality accuracy between the cutter and the punch fixing plate 303.

[0054] The shapes of the rotor cutter edge 318 and stator cutter edge 319 on the concave template 306 of this embodiment are determined according to the design requirements of the motor's rotor and stator. The positional accuracy of the rotor cutter edge 318 and stator cutter edge 319 directly affects the quality of the laminations, therefore, their positional dimensional accuracy needs to be strictly controlled during processing. The concave template 306 is made of high-strength alloy tool steel, which has good wear resistance and service life. The concave template 306 and the lower die base 305 are fixedly connected by screws. The number and distribution of screws are determined according to the size and stress of the concave template 306, and are usually no less than six, evenly distributed around the concave template 306. The position and size of the discharge port 320 on the lower die base 305 are designed according to the flow direction and flow rate of the waste material to ensure that the waste material can flow out smoothly and avoid accumulation inside the die.

[0055] The fitting accuracy of the limiting sleeve 307 and the telescopic guide post 308 in this embodiment of the invention has a significant impact on the overall motion accuracy of the mold. Two limiting sleeves 307 are symmetrically distributed at the bottom of the upper mold base 302 on both sides of the cylinder 310, guiding and limiting the movement of the upper mold base 302. Two telescopic guide posts 308 are also located on the lower mold base 305, corresponding to the positions of the limiting sleeves 307. The diameter of the telescopic end of the telescopic guide post 308 is slightly smaller than the inner diameter of the limiting sleeve 307. An elastic element 309 is sleeved on the outside of the telescopic end of the telescopic guide post 308, with one end contacting the lower mold base 305 and the other end contacting the stepped surface of the telescopic guide post 308. When the upper mold base 302 moves downward, the elastic element 309 is gradually compressed and stores elastic force; when the upper mold base 302 moves upward, the elastic force of the elastic element 309 pushes the telescopic guide post 308 out of the limiting sleeve 307 and drives the upper mold base 302 to reset.

[0056] In this embodiment of the invention, the entire grooving process is automatically controlled by a CNC system. The operator only needs to place the blank to be processed on the limiting rotating column 204 and set the processing parameters before processing; the system can then automatically complete all the grooving work. During processing, the CNC system controls the output shaft movement of the machine tool body 1, the extension and retraction of the cylinder 310, the intermittent rotation of the feeding motor 205, and the lifting and lowering of the pressing assembly 4 according to a preset processing program, achieving coordinated operation of all actuators. Sensors monitor the position and status of each actuator in real time and feed the signals back to the CNC system, forming a closed-loop control to ensure the accuracy and stability of the grooving process. The control system of this embodiment also has fault diagnosis and alarm functions. When an abnormality is detected, it can stop the machine in time and issue an alarm signal to prevent equipment damage and safety accidents.

[0057] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-efficiency single-station multi-cutting-blade automatic switching mold for stamping stators and rotors of electric motors, characterized in that, The device includes a mold base plate (301), an upper mold base (302) is fixedly connected to the bottom of the mold base plate (301), a tool changer drive assembly is provided on the upper mold base (302), a punch fixing plate (303) is provided at the bottom of the upper mold base (302), a stripper plate (304) is movably provided below the punch fixing plate (303), and a lower mold base (305) is provided below the stripper plate (304). The upper mold base (302) is provided with a drive groove (314), and the tool changing drive assembly is provided in the drive groove (314). The tool changing drive assembly includes a cylinder (310) fixedly disposed on one side of the upper mold base (302). The drive end of the cylinder (310) is fixedly connected to a drive column (329). A drive slider (315) is slidably disposed in the drive groove (314) on one side of the drive column (329). A slot (327) is provided at one end of the drive slider (315) near the drive column (329). The end of the drive column (329) is disposed in the slot (327) and is engaged with the drive slider (315) through the slot (327). A top cutter protrusion (328) is fixedly connected at the bottom end of the drive slider (315) away from the cylinder (310). The bottom end face of the top cutter protrusion (328) serves as a limiting surface for selectively limiting the first transmission rod (316) or the second transmission rod (317).

2. The single-station multi-cutting-edge automatic switching mold for high-efficiency motor stator and rotor slotting according to claim 1, characterized in that, The first transmission rod (316) and the second transmission rod (317) are slidably disposed on the upper mold base (302) below the drive slider (315). The first transmission rod (316) and the second transmission rod (317) are disposed along the thickness direction of the upper mold base (302) and can slide up and down in the drive groove (314).

3. The single-station multi-cutting-edge automatic switching mold for high-efficiency motor stator and rotor slotting according to claim 2, characterized in that, The first transmission rod (316) and the second transmission rod (317) are respectively provided with a guide fit structure between them and the upper mold base (302) to ensure the linearity and stability of the transmission rod movement.

4. The single-station multi-cutting-edge automatic switching mold for high-efficiency motor stator and rotor slotting according to claim 1, characterized in that, The upper mold base (302) is fixedly connected to a punch fixing plate (303) at the bottom. Three types of cutting tools, namely a rotor grooving cutter (311), a stator grooving cutter (312), and a separation cutter (313), are slidably arranged on the punch fixing plate (303). The rotor grooving cutter (311), the stator grooving cutter (312), and the separation cutter (313) are all arranged along the thickness direction of the punch fixing plate (303). The separation cutter (313) and the stator grooving cutter (312) are fixedly connected to each other, forming an integrated cutting tool assembly.

5. The single-station multi-cutting-edge automatic switching mold for high-efficiency motor stator and rotor slotting according to claim 4, characterized in that, The top of the punch fixing plate (303) is respectively provided with a first transmission connection groove (330) and a second transmission connection groove (331). The top of the rotor punching cutter (311) extends into the first transmission connection groove (330), the bottom of the first transmission rod (316) extends into the first transmission connection groove (330) and is fixedly connected to the rotor punching cutter (311), the tops of the stator punching cutter (312) and the separation cutting cutter (313) extend into the second transmission connection groove (331), and the bottom of the second transmission rod (317) extends into the second transmission connection groove (331) and is fixedly connected to the stator punching cutter (312) and the separation cutting cutter (313).

6. The single-station multi-cutting-edge automatic switching mold for high-efficiency motor stator and rotor slotting according to claim 4, characterized in that, The separating cutter (313) is a linear cutter with an inclined surface. The inclined surface enables the separating cutter (313) to generate shearing force during the cutting operation, thereby separating the punch from the raw material belt.

7. The single-station multi-cutting-edge automatic switching mold for high-efficiency motor stator and rotor slotting according to claim 6, characterized in that, Below the punch fixing plate (303), there is a stripper plate (304). The stripper plate (304) is provided with a first through groove (321) and a second through groove (322). The first through groove (321) and the second through groove (322) are respectively matched with the stator punching knife (312) and the rotor punching knife (311) above. The stripper plate (304) between the first through groove (321) and the second through groove (322) is provided with a cutting through groove (323). The cutting through groove (323) is connected to the first through groove (321). The cutting through groove (323) is matched with the separation cutting knife (313).

8. The single-station multi-cutting-edge automatic switching mold for high-efficiency motor stator and rotor slotting according to claim 7, characterized in that, The top two corners of the unloading plate (304) are fixedly connected to guide posts (324). The guide posts (324) are set in a vertical direction. The bottom end of the punch fixing plate (303) above the guide posts (324) is provided with a guide groove (326). The shape of the guide groove (326) is adapted to the guide post (324). The top of the guide post (324) is slidably set in the guide groove (326). The top of the guide groove (326) is fixedly connected to a telescopic spring. The bottom of the telescopic spring is fixedly connected to the top of the guide post (324).

9. The single-station multi-cutting-edge automatic switching mold for high-efficiency motor stator and rotor slotting according to claim 1, characterized in that, The upper mold base (302) on both sides of the cylinder (310) is fixedly connected to the bottom of the limiting sleeve (307). The limiting sleeve (307) is set in the vertical direction. The lower mold base (305) below the limiting sleeve (307) is fixedly connected to the telescopic guide post (308). The telescopic end of the telescopic guide post (308) is fitted with an elastic element (309). The elastic element (309) is a spring. The upper end of the telescopic guide post (308) extends into the limiting sleeve (307) and engages with the limiting sleeve (307).

10. A single-station multi-cutting-edge automatic switching mold for high-efficiency motor stator and rotor slotting according to claim 8, characterized in that, The lower mold base (305) is fixedly connected to the concave template (306). The concave template (306) has a rotor cutter edge (318) and a stator cutter edge (319). The rotor cutter edge (318) and the stator cutter edge (319) are respectively set to correspond to the rotor grooving cutter (311) and the stator grooving cutter (312).

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