An automatic assembly equipment for motor rotor core

Abstract

The application discloses a motor rotor core automatic assembly equipment and relates to the field of high-end manufacturing technology.The equipment comprises a progressive die and a blanking assembly.The progressive die comprises a fixed die and a movable die.The fixed die is provided with a die core assembly and a cooling structure.The movable die is provided with a pressing assembly, a stamping assembly and a stamping die core.The pressing assembly is used for partition locking and pressing the to-be-stamped area of the material plate, so that the stress transmission between different areas in the multi-hole synchronous stamping process is inhibited, the problems of the tensile deformation and the hole position deviation of the thin silicon steel material plate are solved, and the multi-station synchronous precision stamping is realized by the stamping assembly.Meanwhile, the demolding assembly is used for synchronously completing the silicon steel sheet cutting, local heating and laminating assembly in the stamping process, so that the silicon steel sheet is directly combined with the rotor shaft in the heating state to form an interference fit or a convex cell buckling structure, thereby realizing the integrated continuous processing of the stamping, heating and assembly, and improving the rotor core assembly precision, the combination tightness and the overall production efficiency.

Description

Technical Field

[0001] This invention relates to the field of high-end manufacturing technology, and in particular to automated assembly equipment for motor rotor cores. Background Technology

[0002] In the manufacturing process of motor rotor cores, progressive dies are typically used to continuously stamp silicon steel sheets, and then the individual silicon steel sheets are transferred to a stacking station for assembly. In existing multi-station stamping structures, the sheet is usually held as a whole by a single pressure plate. When stamping thin sheets or densely packed holes simultaneously, the stress between different stamping areas is transmitted through the sheet, which can easily cause local stretching, warping, and hole misalignment. This leads to a decrease in hole spacing accuracy and overall flatness, and affects the accuracy of subsequent stacking. At the same time, to avoid process interference, traditional progressive dies require a long step distance between each station, resulting in a large die size and limited stamping efficiency.

[0003] Furthermore, current rotor core production typically employs a discrete process where stamping and assembly are separated. Independent core blocks are first formed, then installed onto the rotor shaft surface via integral cold pressing or integral hot fitting. In the cold pressing process, significant assembly stress can easily be generated, leading to slight bending of the rotor shaft and causing vibration and noise during motor operation. During integral hot fitting, the thermal resistance between core layers can easily create internal and external temperature differences, resulting in uneven expansion of the inner hole and increased residual stress, affecting assembly stability and electromagnetic performance. In addition, silicon steel sheets are prone to scratching the rotor shaft surface during integral pressing, reducing fitting accuracy and fatigue life. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of large step distances between processes in traditional solutions to reduce interference, low efficiency, and complex processes after silicon steel sheet forming, and to propose an automated assembly equipment for motor rotor cores.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an automated assembly equipment for motor rotor cores, comprising a progressive die for a multi-process stamping plate and a blanking assembly at its bottom, wherein the progressive die comprises a fixed die and a moving die, the fixed die comprises a base and a plurality of scrap ports opened on the base, and a plurality of mold core assemblies correspondingly arranged above the scrap ports, and a cooling structure is provided on the base. The moving mold includes a clamping assembly for local multi-level pressing of the material plate, and a number of stamping die cores for synchronous multi-point stamping of the pressed material plate are installed on the clamping assembly, as well as a stamping assembly that coordinates the clamping assembly and the number of stamping die cores to be positioned and then stamped together in rapid up-and-down reciprocating motion. A demolding component is installed through the clamping component and the stamping component. The demolding component includes a telescopic cylinder and a pressure equalizing base installed at its bottom end. A heating die-cutting structure slides on the inner wall of the pressure equalizing base. An electromagnet for delay separation control of the heating die-cutting structure is installed on the inner wall of the pressure equalizing base. The stamping assembly coordinates the stamping die core to perform multi-process synchronous reciprocating stamping after being pressed by the clamping assembly at multiple stages. It also engages with the die core assembly to complete the multi-process synchronous processing and forming of the material plate. When the stamping die core moves upward, the electromagnet is de-energized after a delay, causing the heating die-cutting structure to fall and pre-heat the material plate. When the stamping die moves downward, the pressure equalizing seat is subjected to pressure by the stamping assembly to the heating die-cutting structure, which separates the heating area of ​​the material plate. Under the action of the telescopic cylinder, the single heated silicon steel sheet is interference-fitted onto the rotor shaft, so that the heated silicon steel sheet is engaged with the protrusion of the adjacent cooled silicon steel sheet.

[0006] As a further description of the above technical solution: the fixed mold includes multiple sliding columns on the base that guide the pressing assembly to slide back and forth, and the cooling structure includes a pressure chamber opened on the side of the corresponding end waste port, and the inner wall of the pressure chamber is equipped with a heat dissipation shroud with a porous inner side.

[0007] As a further description of the above technical solution: the mold core assembly includes a mold base fixed on the base, and a plurality of positioning rings are fixed on the inner wall of the mold base, and an installation ring is provided below the positioning rings. The positioning rings cooperate with the installation rings to clamp and install the fixed mold core.

[0008] As a further description of the above technical solution: the clamping assembly includes a top seat, a plurality of positioning covers are fixed on the lower surface of the top seat, and a pressure plate slides on the surface of the plurality of positioning covers together, and a plurality of elastic telescopic rods are fixed between the pressure plate and the top seat.

[0009] As a further description of the above technical solution: the stamping assembly includes a stamping plate connected to an external reciprocating mechanical power source, and a plurality of guide cylinders are slidably mounted on the upper limit of the stamping plate. The bottom end of the guide cylinder is fixed on a top seat, and a top spring is provided on the surface of the guide cylinder. A stamping frame is fixed on the upper surface of the stamping plate.

[0010] As a further description of the above technical solution: the stamping die includes a movable die that slides on the inner wall of the positioning cover, and a first stamping rod is fixed to the top of the movable die. The first stamping rod slides through the guide cylinder, and the top end of the first stamping rod is fixed to the stamping frame.

[0011] As a further description of the above technical solution: the demolding assembly includes a second stamping rod fixed at the telescopic end of a telescopic cylinder, and a conductive sleeve is installed on the surface of the second stamping rod. The conductive sleeve slides on the inner wall of the corresponding guide cylinder, the pressure equalizing seat slides in the corresponding positioning cover, and the telescopic cylinder is fixed through the stamping frame.

[0012] As a further description of the above technical solution: the heating die-cutting structure includes a guide cover that slides on the inner wall of the pressure equalizing seat, a heating plate is fixed at the bottom of the guide cover, and a cutting ring is installed on the outer edge of the heating plate.

[0013] As a further description of the above technical solution: the unloading assembly includes a driver and a worktable driven by the driver to rotate, and multiple unloading cylinders are installed on the worktable. A stacking platform is fixed to the end of each unloading cylinder. The stacking platform is either empty or carries the rotor shaft axially positioned at the bottom of the corresponding waste port. A rotary valve is installed at the bottom of the worktable for individually connecting to and controlling the extension and retraction of the unloading cylinder.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In this solution, during the mold closing process, the material plate moves a specified step distance and then stops. First, the pressure plate of the clamping component contacts the material plate. The area where the pressure plate holds the material plate only keeps the area to be stamped in an exposed state. As the pressure continues to decrease, the pressure on the pressure plate gradually increases under the action of the elastic telescopic rod until the top seat, with the positioning cover, adheres to the inner side of the pressure plate and locks and holds the outer edge of the exposed area. This prevents the deformation caused by the mutual interference of forces on multiple areas through the material plate during the stamping process. At the same time, as the stamping plate continues to decrease, the stamping plate slides on the guide cylinder and compresses the top spring. The stamping frame moves down with the moving die core through the first stamping rod and finally slides out of the positioning cover. The exposed area of ​​the material plate is clamped between the moving die core and the fixed die core to complete the stamping. In this process, different positions of the same area of ​​the material plate are stamped simultaneously and precisely, which effectively solves the problem of tensile deformation and flatness mutual interference that easily occur when thin material plates are stamped simultaneously with multiple holes. It greatly reduces the interval distance between different processes and also improves the accuracy.

[0015] 2. Simultaneously, this solution also incorporates a demolding component at the end. This component utilizes the stamping pressure during the mold closing process to complete the cutting. During mold closing, as the clamping component fixes the material plate, the equalizing pressure seat and the aforementioned moving mold core move downwards synchronously. The equalizing pressure seat, by holding the heating plate and through the cutting action between the cutting ring and the positioning ring, partially cuts the material plate, forming a stamped and heated silicon steel sheet. The guide cover is then attracted into the equalizing pressure seat by the electromagnet. The telescopic cylinder, through the second stamping rod, moves the equalizing pressure seat, the positioning cover, and the heating plate... The disc remains in contact with the silicon steel sheet and is pressed down to complete the interlocking operation of multiple silicon steel sheets. In addition to realizing the traditional continuous stacking of multiple silicon steel sheets on the stacking table, this structure also heats a single silicon steel sheet through a controllable heating method and then directly presses it onto the rotor shaft surface with an interference fit. The stacking and sleeve operation is completed by the interlocking of the protrusions. After the stacking is completed, the electromagnet pulls the guide cover and the heating disc to move upward. After the material plate moves to a fixed step distance, the electromagnet is de-energized, and the heating disc falls precisely and is positioned for heating under the sliding action of the guide cover and the pressure equalizing seat. In the above process, by integrating the cutting, heating and stacking assembly processes into the same die-closing stroke, the silicon steel sheet can be directly and locally heated after stamping and synchronously interference-fitted onto the rotor shaft surface in a continuous operation. This improves the synchronicity and tightness of the stacking assembly without the need for a separate heating station and secondary assembly steps. Furthermore, it allows for the optional dual-process of traditional stacking or direct heat treatment of the rotor shaft fitting, greatly improving efficiency and providing production selectivity. Attached Figure Description

[0016] Figure 1 A three-dimensional schematic diagram from the front view of the present invention is shown; Figure 2 A three-dimensional schematic diagram according to the present invention is shown; Figure 3 A partial cross-sectional schematic diagram of the feeding assembly according to the present invention is shown; Figure 4 A frontal cross-sectional schematic diagram of the progressive die according to the present invention is shown; Figure 5 The appendix of the present invention is shown Figure 4 Enlarged view of point A in the middle; Figure 6 An explosion diagram according to the present invention is shown; Figure 7 An exploded schematic diagram of the moving model according to the present invention is shown; Figure 8 An exploded schematic diagram of the mold according to the present invention is shown.

[0017] Legend: 1. Mold setting; 11. Base; 12. Mold core assembly; 121. Mold base; 122. Mounting ring; 123. Locating ring; 124. Fixed mold core; 13. Waste outlet; 14. Pressure chamber; 15. Heat sink; 16. Sliding column; 2. Moving mold; 21. Clamping assembly; 211. Top seat; 212. Positioning cover; 213. Elastic telescopic rod; 214. Pressure plate; 22. Stamping assembly; 221. Stamping plate; 222. Guide cylinder; 223. Stamping frame; 224. Top spring; 23. Demolding assembly; 231. Telescopic cylinder; 232. Second punch rod; 233. Pressure equalizing seat; 234. Guide cover; 235. Heating plate; 236. Cutting ring; 237. Electromagnet; 238. Conductive sleeve; 24. Stamping die core; 241. Moving die core; 242. First stamping rod; 3. Feeding assembly; 31. Driver; 32. Rotary valve; 33. Worktable; 34. Unloading cylinder; 35. Stacking table; 36. Rotor shaft; 4. Material plate. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figures 1-8 As shown, the present invention provides an automated assembly equipment for motor rotor cores, including a progressive die for a multi-process stamping plate 4 and a blanking assembly 3 at its bottom. The progressive die includes a fixed die 1 and a moving die 2. The fixed die 1 includes a base 11 and several scrap ports 13 opened on the base 11. The base 11 provides mounting support for the entire progressive die, and the multiple scrap ports 13 are used to separate and drop the stamping scrap and the formed silicon steel sheet at different work stations, so that the plate 4 can move continuously along a fixed step distance to complete multi-process processing. The equipment also includes multiple die core assemblies 12 corresponding to the scrap ports 13. The base 11 is provided with a cooling structure. At the same time, the cooling structure continuously dissipates heat from the high-frequency stamping area at the end, reducing the heat accumulation of the die core after long-term operation, and avoiding the problem of hole position accuracy deviation and local heat deformation of silicon steel sheet caused by mold thermal expansion.

[0020] The moving mold 2 includes a clamping assembly 21 that locally and multi-stage presses the material plate 4, and a number of stamping die cores 24 that synchronously stamp the material plate 4 at multiple points after pressing are installed on the clamping assembly 21, as well as a stamping assembly 22 that coordinates the clamping assembly 21 and the number of stamping die cores 24 to be positioned and then stamped together in rapid up and down reciprocating motion; By gradually increasing the pressure and locking the outer periphery of the material plate 4 to be processed by the clamping component 21, the stamping area is made into a stable and limited state before the formal punching, so as to avoid stress transmission through the continuous material plate 4 when multiple stamping areas are subjected to force at the same time, and reduce the problems of stretching, warping and hole position displacement of the thin silicon steel material plate 4. At the same time, the stamping component 22 drives several stamping die cores 24 to press down synchronously, so that the material plate 4 completes fine punching processing at multiple positions in the same stroke, thereby shortening the required step distance between each process, increasing the internal station integration density of the progressive die, and improving the overall continuous processing efficiency.

[0021] A demolding component 23 is installed through both the pressing component 21 and the stamping component 22. The demolding component 23 includes a telescopic cylinder 231 and a pressure equalizing seat 233 installed at its bottom end. A heating die-cutting structure slides on the inner wall of the pressure equalizing seat 233. An electromagnet 237 for delay separation control of the heating die-cutting structure is installed on the inner wall of the pressure equalizing seat 233. After stamping, the demolding component 23 continues to hold the silicon steel sheet synchronously, ensuring that the silicon steel sheet remains in a stable position during the cutting and separation process. This prevents positional shifts caused by instantaneous springback after forming. Simultaneously, under the delayed control of the electromagnet 237, the heating and die-cutting structure can accurately fall within the moving gap of the material plate 4 and adhere to the surface of the silicon steel sheet for localized heating. This allows the silicon steel sheet to immediately enter a hot-fitting state after cutting, thereby directly forming an interference fit or cam-cell fastening structure with the rotor shaft 36. This achieves integrated continuous processing of stamping, cutting, heating, and assembly, reducing heat loss and positioning errors caused by traditional independent heating stations and secondary handling processes, and improving the tightness of rotor core assembly and production continuity.

[0022] The stamping assembly 22 coordinates the stamping die core 24 to perform multi-process synchronous reciprocating stamping after being pressed by the clamping assembly 21 at multiple stages, and the die core assembly 12 is fitted to complete the multi-process synchronous processing and forming of the material plate 4. When the stamping die core 24 moves upward, the electromagnet 237 is de-energized after a delay, so that the heating die-cutting structure falls and contacts the material plate 4 in advance for heating. When the stamping die moves downward, the pressure equalizing seat 233 is subjected to pressure by the stamping assembly 22 to the heating die-cutting structure, and the heating area of ​​the material plate 4 is separated by die-cutting. Under the action of the telescopic cylinder 231, the single heated silicon steel sheet is interference-fitted onto the rotor shaft 36, so that the heated silicon steel sheet is engaged with the adjacent cooled silicon steel sheet protrusion.

[0023] Specifically, such as Figure 4 and Figure 8 As shown, the fixed mold 1 includes multiple sliding posts 16 on the base 11 that guide the pressing component 21 to slide back and forth. The multiple sliding posts 16 form a linear guide for the overall pressing trajectory of the pressing component 21, so that the pressing component 21 maintains a stable up and down movement state during high-speed reciprocating stamping, avoids lateral displacement causing mold biting or stamping area misalignment, and improves the motion stability during multi-station synchronous stamping. The cooling structure includes a pressure chamber 14 located on the side of the corresponding end scrap port 13, and the inner wall of the pressure chamber 14 is fitted with a perforated heat dissipation shroud 15. A directional pressurized airflow is generated inside the pressure chamber 14, and in conjunction with the perforated heat dissipation shroud 15, continuous heat dissipation is provided to the end stamping area. This reduces localized heat accumulation in the die core during continuous stamping, prevents thermal expansion errors in the silicon steel sheet after heating, and reduces wear caused by long-term high-temperature operation of the die core.

[0024] Specifically, such as Figure 8As shown, the mold core assembly 12 includes a mold base 121 fixed on the base 11, and a plurality of positioning rings 123 are fixed on the inner wall of the mold base 121. A mounting ring 122 is provided below the positioning rings 123. The positioning rings 123 cooperate with the mounting rings 122 to clamp and install the fixed mold core 124. The positioning rings 123 and the mounting rings 122 form an upper and lower clamping and limiting structure, which keeps the fixed mold core 124 stably positioned under high-frequency stamping, avoids the fixed mold core 124 from loosening and causing hole deviation, and facilitates the quick disassembly and replacement of the fixed mold core 124, improving the efficiency of subsequent maintenance.

[0025] Specifically, such as Figure 4 As shown, the clamping assembly 21 includes a top seat 211, with several positioning covers 212 fixed on the lower surface of the top seat 211. A pressure plate 214 slides along the surfaces of the positioning covers 212, and several elastic telescopic rods 213 are fixed between the pressure plate 214 and the top seat 211. The pressure plate 214 first contacts the material plate 4 to form a pre-clamping effect. Subsequently, under the action of the elastic telescopic rods 213, the clamping pressure gradually increases, allowing the material plate 4 to achieve a progressive locking effect at different stages. Simultaneously, the positioning covers 212 form a local enclosure and limit around the area to be stamped, thereby reducing the stress transfer problem during simultaneous stamping of multiple areas and preventing tensile deformation and edge warping of the thin material plate 4.

[0026] Specifically, such as Figure 4 As shown, the stamping assembly 22 includes a stamping plate 221 connected to an external reciprocating mechanical power source. Several guide cylinders 222 slide along the upper limit of the stamping plate 221. The bottom ends of the guide cylinders 222 are fixed to the top seat 211, and top springs 224 are provided on the surface of the guide cylinders 222. A stamping frame 223 is fixed to the upper surface of the stamping plate 221. The stamping plate 221 drives the stamping frame 223 to move downwards as a whole, and the guide cylinders 222 provide stable guidance, ensuring that the stamping frame 223 remains in a vertically downward pressing state during high-speed reciprocating motion. The top springs 224 provide buffering and resetting during the stamping process, reducing the impact load generated by hard collisions with the mold, and improving the overall stamping stability and mold lifespan.

[0027] Specifically, such as Figure 4 As shown, the stamping die 24 includes a movable die 241 that slides on the inner wall of the positioning cover 212, and a first stamping rod 242 is fixed to the top of the movable die 241. The first stamping rod 242 slides through the guide cylinder 222, and the top of the first stamping rod 242 is fixed to the stamping frame 223. The first stamping rod 242 accurately transmits the downward pressure of the stamping frame 223 to the movable die 241, so that the movable die 241 slides stably along the inside of the positioning cover 212 and forms a high-precision stamping fit with the fixed die 124, thereby improving the punching accuracy and edge forming quality of the multi-hole structure.

[0028] Specifically, such as Figure 5As shown, the demolding assembly 23 includes a second stamping rod 232 fixed at the telescopic end of a telescopic cylinder 231, and a conductive sleeve 238 is installed on the surface of the second stamping rod 232. The conductive sleeve 238 slides on the inner wall of the corresponding guide cylinder 222, and the pressure equalizing seat 233 slides inside the corresponding positioning cover 212. The telescopic cylinder 231 is fixed through and fixed on the stamping frame 223. The downward pressure of the stamping frame 223 is accurately transmitted to the moving die core 241 through the first stamping rod 242, so that the moving die core 241 slides stably inside the positioning cover 212 and forms a high-precision fitting stamping with the fixed die core 124, thereby improving the punching accuracy and edge forming quality of the multi-hole structure. The telescopic cylinder 231 controls the pressure equalizing seat 233 to press down independently, so that it continuously presses the silicon steel sheet after stamping, preventing the silicon steel sheet from shifting after cutting. At the same time, the conductive sleeve 238 forms a power supply connection during the sliding process inside the guide cylinder 222, so that the heating structure maintains stable power supply in the reciprocating motion state, improving the overall heating control stability.

[0029] Specifically, such as Figure 5 As shown, the heated die-cutting structure includes a guide cover 234 that slides on the inner wall of the equalizing base 233. A heating plate 235 is fixed to the bottom of the guide cover 234, and a cutting ring 236 is installed on the outer edge of the heating plate 235. The heating plate 235 locally heats the silicon steel sheet after stamping, causing the inner hole area of ​​the silicon steel sheet to expand due to heat, which facilitates the subsequent interference fit with the rotor shaft 36. The cutting ring 236, in conjunction with the positioning ring 123, simultaneously cuts the silicon steel sheet during the pressing process of the equalizing base 233, so that the cutting and heating processes are integrated into the same stroke, improving production continuity and assembly efficiency.

[0030] Specifically, such as Figure 2 and Figure 3 As shown, the unloading assembly 3 includes a driver 31 and a worktable 33 driven by the driver to rotate. Multiple unloading cylinders 34 are installed on the worktable 33. A stacking table 35 is fixed to the end of the unloading cylinder 34. The stacking table 35 is vacant or carries the rotor shaft 36 axially positioned at the bottom of the corresponding waste port 13. A rotary valve 32 is installed at the bottom of the worktable 33 for individually connecting to and controlling the extension and retraction of the unloading cylinder 34.

[0031] The solution is further detailed as follows: the external mechanical reciprocating drive mechanism drives the stamping plate 221 of the stamping assembly 22 to move up and down reciprocally. The stamping plate 221 slides through multiple guide cylinders 222, and at the same time, the reciprocating top seat 211 is supported by the sliding column 16 to maintain vertical movement, so that it has better structural strength during rapid reciprocating movement and ensures the stability and accuracy of rapid reciprocating stamping. During the mold closing process, as the material plate 4 moves a specified step distance and then stops, the pressure plate 214 of the clamping component 21 first contacts the material plate 4. The area where the pressure plate 214 holds the material plate 4 only keeps the area to be stamped in an exposed state. As the pressure continues to be pressed down, the pressure of the pressure plate 214 gradually increases under the action of the elastic telescopic rod 213 until the top seat 211 with the positioning cover 212 fits against the inner side of the pressure plate 214 to lock and hold the outer edge of the exposed area, so as to avoid multiple areas being subjected to force through the material plate 4 and causing deformation. As the stamping plate 221 continues to press down, the stamping plate 221 slides on the guide cylinder 222 and compresses the top spring 224. The stamping frame 223 moves down with the moving mold core 241 through the first stamping rod 242 and finally slides out of the positioning cover 212. The exposed area of ​​the material plate 4 is clamped between the moving mold core 241 and the fixed mold core 124 to complete the stamping.

[0032] The demolding component 23 uses the stamping pressure during the mold closing process to complete the cutting. Specifically, during the mold closing process, as the clamping component 21 completes the fixing of the material plate 4, the pressure equalizing seat 233 and the aforementioned moving mold core 241 move down synchronously. The pressure equalizing seat 233 holds the heating plate 235 and cuts a portion of the material plate 4 through the cutting action between the cutting ring 236 and the positioning ring 123 to form a stamped and heated silicon steel sheet. Then, the guide cover 234 is attracted into the pressure equalizing seat 233 by the action of the electromagnet 237. The telescopic cylinder 231 presses the pressure equalizing seat 233, the guide cover 234 and the heating plate 235 in a state of contact with the silicon steel sheet through the second stamping rod 232, thus completing the fastening operation of multiple silicon steel sheets.

[0033] This structure not only allows multiple silicon steel sheets to be continuously stacked on the stacking table 35 in the traditional way, but also allows a single silicon steel sheet to be heated by a controllable heating method and then directly pressed onto the surface of the rotor shaft 36 by interference fit. The stacking and fitting operations are completed by the buckling of the protrusions. After the stacking is completed, the electromagnet 237 pulls the guide cover 234 and the heating plate 235 upward. After the material plate 4 moves a fixed step distance, the electromagnet 237 is de-energized. The heating plate 235 falls precisely and is positioned for heating under the sliding action of the guide cover 234 and the pressure equalizing seat 233.

[0034] Furthermore, during the mold opening process, the pressure chamber 14 is connected to high-pressure air through the bottom interface. The high-pressure air enters the pressure chamber 14 through the interface and is then evenly discharged through the holes on the surface of the heat sink 15. This cools down the silicon steel sheets that have been stacked on the rotor shaft 36, preventing internal heat accumulation during the stacking of the next silicon steel sheet. This ensures that the heat fitting process only heats a single silicon steel sheet, facilitating interference fit.

[0035] Simultaneously, when needed, the rotor shaft 36 is not placed on the stacking table 35, while the electromagnet 237 is continuously energized and the heating plate 235 is turned off, allowing the silicon steel sheets cut from the material plate 4 to be stacked on the stacking table 35. In the above, the stamping and cutting step is driven by mechanical force, while the holding force of the telescopic cylinder 231 only acts on the stacking drive of the silicon steel sheets.

[0036] In summary, this solution integrates multi-station precision stamping, local progressive pressing, online cutting, controllable heating, and rotor shaft 36 sleeve assembly into the same continuous progressive stroke. By using the clamping assembly 21 to lock the stamping area of ​​the material plate 4 in sections, it solves the problems of stress transmission, tensile deformation, and decreased hole accuracy that are prone to occur in the multi-hole synchronous stamping process of thin silicon steel material plate 4. Furthermore, the synchronous stamping structure shortens the process step distance and improves the integration of internal stations and continuous processing efficiency of the mold.

[0037] Meanwhile, this solution, through the coordinated cooperation of the demolding component 23 and the heating die-cutting structure, directly completes the local cutting and heating after the silicon steel sheet is stamped, so that the silicon steel sheet can directly form an interference fit or protrusion snap-fit ​​structure with the rotor shaft 36 under thermal expansion. This changes the traditional processing path of "stamping, transfer, heating and assembly" being separated, avoids the problems of temperature decay, positioning deviation and residual stress that occur during independent heat fitting, and improves the tightness of the connection and assembly stability between the iron core and the rotor shaft 36.

[0038] Furthermore, this solution also possesses the capability to switch between traditional lamination and hot-fitting processes, allowing for flexible selection of assembly methods according to different production needs. While ensuring production continuity, it improves the equipment's process adaptability and production flexibility, thereby achieving high-precision, high-density, and high-efficiency integrated automated assembly of the rotor core. The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of this invention.

Claims

1. An automated assembly equipment for motor rotor cores, comprising a progressive die for a multi-stage stamping plate (4) and a blanking assembly (3) at its bottom, characterized in that: The progressive die includes a fixed die (1) and a moving die (2). The fixed die (1) includes a base (11) and a plurality of scrap ports (13) opened on the base (11), as well as a plurality of die core assemblies (12) correspondingly arranged above the scrap ports (13). A cooling structure is provided on the base (11). The moving mold (2) includes a clamping assembly (21) for local multi-level pressing of the material plate (4), and a number of stamping die cores (24) for synchronous multi-point stamping of the material plate (4) after pressing are installed on the clamping assembly (21), as well as a stamping assembly (22) that coordinates the clamping assembly (21) and the number of stamping die cores (24) to be positioned and then stamped together in rapid up and down reciprocating motion. A demolding assembly (23) is installed through both the pressing assembly (21) and the stamping assembly (22). The demolding assembly (23) includes a telescopic cylinder (231) and a pressure equalizing seat (233) installed at its bottom end. A heating die-cutting structure slides on the inner wall of the pressure equalizing seat (233). An electromagnet (237) for delay separation control of the heating die-cutting structure is installed on the inner wall of the pressure equalizing seat (233). The stamping assembly (22) coordinates the stamping die (24) to perform multi-process synchronous reciprocating stamping after being pressed by the clamping assembly (21) at multiple stages, and the die assembly (12) is fitted to complete the multi-process synchronous processing and forming of the material plate (4). When the stamping die (24) moves upward, the electromagnet (237) is de-energized after a delay, so that the heating die-cutting structure falls and is in advance to fit the material plate (4) for heating. When the stamping die moves downward, the pressure equalizing seat (233) is subjected to the action of the stamping assembly (22) to apply pressure to the heating die-cutting structure to separate the heating area of ​​the material plate (4) and, under the action of the telescopic cylinder (231), the single heated silicon steel sheet is interference-fitted onto the rotor shaft (36), so that the heated silicon steel sheet is engaged with the adjacent cooled silicon steel sheet protrusion.

2. The automated assembly equipment for motor rotor cores according to claim 1, characterized in that, The fixed mold (1) includes multiple sliding columns (16) on the base (11) that guide the pressing assembly (21) to slide back and forth. The cooling structure on the fixed mold (1) includes a pressure chamber (14) opened on the side of the corresponding end waste port (13), and the inner wall of the pressure chamber (14) is equipped with a heat dissipation cover (15) with a porous inner side.

3. The automated assembly equipment for motor rotor cores according to claim 1, characterized in that, The mold core assembly (12) includes a mold base (121) fixed on the base (11), and a plurality of positioning rings (123) are fixed on the inner wall of the mold base (121), and an installation ring (122) is provided below the positioning rings (123). The positioning rings (123) cooperate with the installation rings (122) to clamp and install the fixed mold core (124).

4. The automated assembly equipment for motor rotor cores according to claim 1, characterized in that, The clamping assembly (21) includes a top seat (211), a plurality of positioning covers (212) are fixed on the lower surface of the top seat (211), and a pressure plate (214) slides on the surface of the plurality of positioning covers (212). A plurality of elastic telescopic rods (213) are fixed between the pressure plate (214) and the top seat (211).

5. The automated assembly equipment for motor rotor cores according to claim 4, characterized in that, The stamping assembly (22) includes a stamping plate (221) connected to an external reciprocating mechanical power source, and a plurality of guide cylinders (222) are slidably mounted on the upper limit of the stamping plate (221). The bottom end of the guide cylinder (222) is fixed on the top seat (211), and a top spring (224) is provided on the surface of the guide cylinder (222). A stamping frame (223) is fixed on the upper surface of the stamping plate (221).

6. The automated assembly equipment for motor rotor cores according to claim 5, characterized in that, The stamping die (24) includes a movable die (241) that slides on the inner wall of the positioning cover (212), and a first stamping rod (242) is fixed on the top of the movable die (241). The first stamping rod (242) slides through the guide cylinder (222), and the top of the first stamping rod (242) is fixed to the stamping frame (223).

7. The automated assembly equipment for motor rotor cores according to claim 1, characterized in that, The demolding assembly (23) includes a second stamping rod (232) fixed at the telescopic end of a telescopic cylinder (231), and a conductive sleeve (238) is installed on the surface of the second stamping rod (232). The conductive sleeve (238) slides on the inner wall of the corresponding guide cylinder (222), the pressure equalizing seat (233) slides in the corresponding positioning cover (212), and the telescopic cylinder (231) is fixed through the stamping frame (223).

8. The automated assembly equipment for motor rotor cores according to claim 7, characterized in that, The heating die-cutting structure includes a guide cover (234) that slides on the inner wall of the pressure equalizing seat (233), a heating plate (235) is fixed at the bottom of the guide cover (234), and a cutting ring (236) is installed on the outer edge of the heating plate (235).

9. The automated assembly equipment for motor rotor cores according to claim 1, characterized in that, The unloading assembly (3) includes a driver (31) and a worktable (33) driven by the driver to rotate. Multiple unloading cylinders (34) are installed on the worktable (33). A stacking table (35) is fixed to the end of the unloading cylinder (34). The stacking table (35) is vacant or carries the rotor shaft (36) axially positioned at the bottom of the corresponding waste port (13). A rotary valve (32) is installed at the bottom of the worktable (33) for individually connecting and controlling the extension and retraction of the unloading cylinder (34).

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