Stator lamination stacking die device, Stator lamination stacking assembly method

Abstract

The stator lamination stacking die device of the present application is provided with an automatic telescopic rod capable of freely penetrating the lamination and the upper cover plate mounted on the base, a clamping mechanism mounted on the multi-degree-of-freedom moving device, a pressing block assembly and an automatic nut tightening machine mounted on the clamping mechanism, forming an automatic operation from lamination stacking to nut tightening, realizing the automatic assembly operation process of lamination stacking and upper cover plate pressing, improving the automation level of stator lamination stacking assembly, reducing the manual participation, improving the standardization, safety and stability of stator lamination stacking assembly operation, adapting to the sequential lamination stacking assembly of stator in the assembly line operation, avoiding the intermediate product, optimizing the operation process and the utilization rate of operation space, effectively shortening the overall production cycle, forming a stable operation rhythm and improving the quality of stator. The present application also provides a stator lamination stacking assembly method.

Description

Technical Field

[0001] This invention relates to a stator lamination stacking die device, belonging to the field of stator lamination stacking technology. This invention also relates to a stator lamination stacking assembly method. Background Technology

[0002] In the production of motor stators, lamination stacking is one of the key processes. Existing stator lamination stacking dies mainly rely on manual operation on a four-column hydraulic press or an umbrella-type hydraulic press to complete the handling, positioning, and installation of the upper cover plate. The stacking operation process is as follows: 1. After the operator stacks the pressure ring, toothed pressure plate, and punch, the operator uses an overhead crane to lift the upper cover plate onto the stacking mold. After initially tightening it with nuts, the operator lifts the stacking mold onto the flat car of the four-column hydraulic press. 2. Place the shims, apply pressure with the four-column hydraulic press, and the stampings are pressed tightly; 3. When tightening, use a torque wrench to tighten the nut, transferring the tightening force to the screw. 4. Depressurize and remove the stator core using a flatcar.

[0003] The above-mentioned work method has the following defects: 1. Due to structural limitations, the space under the four-column hydraulic press is narrow, and standard industrial robots are limited by their degrees of freedom of movement and working angle, making it difficult to effectively intervene in the automatic tightening process of nuts. Therefore, while maintaining the pressurized state, operators need to manually complete the nut tightening operation in the narrow space under the hydraulic press, which is labor-intensive and poses certain safety hazards.

[0004] 2. The control precision of the four-column hydraulic press is limited. Affected by the lag response of the hydraulic system and pressure fluctuations, there may be a large difference in the inter-laminar pressure between multiple stator cores. This may result in a certain difference in the inter-laminar pressure between multiple motors of the same type, leading to unstable stator quality.

[0005] 3. Since the assembly of the top cover plate requires the cooperation of multiple people, operators usually adopt a batch stacking and centralized pressing operation mode. After completing the stacking of multiple stator core laminations, they press them together, which leads to the temporary storage of a large number of intermediate products and occupies additional work space.

[0006] Therefore, the existing methods for assembling and stacking stamping dies and top cover plates have low levels of automation, which restricts the improvement of production cycle and efficiency. Summary of the Invention

[0007] The stator lamination stacking die device provided by this invention automates the entire process from lamination stacking to nut tightening, realizing an automated assembly flow for lamination stacking and upper cover plate pressing. This improves the automation level of stator lamination stacking assembly, reduces manual intervention, and enhances the standardization, safety, and stability of stator lamination stacking assembly operations. It is suitable for sequential stator stacking assembly in assembly line operations, avoiding intermediate products, optimizing the workflow and utilization of workspace, effectively shortening the overall production cycle, forming a stable work rhythm, and improving stator quality. This invention also provides a stator lamination stacking assembly method.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A stator lamination stacking die device includes a base for stacking laminations, an upper cover plate covering the laminations, and a screw rod passing through the laminations and the upper cover plate. The device is characterized by further including an automatic telescopic rod mounted on the base along the central axis of the laminations and capable of freely extending and retracting through the laminations and the upper cover plate; a pressure block assembly for pressing the laminations; an automatic nut tightening machine for tightening nuts onto the screw rod; and a clamping mechanism for driving the pressure block assembly and the automatic nut tightening machine. The clamping mechanism is mounted on a multi-degree-of-freedom mobile device. The pressure block assembly and the automatic nut tightening machine are respectively mounted on the clamping mechanism and located above the upper cover plate. When pressing the laminations, the pressure block assembly, moving with the clamping mechanism, grips the automatic telescopic rod extending from the upper cover plate, and as the automatic telescopic rod retracts, it disengages from the clamping mechanism and inserts into the upper cover plate to press the laminations.

[0009] Preferably, the clamping mechanism includes a main mounting frame mounted on a multi-degree-of-freedom mobile device. The main mounting frame is equipped with a fixed clamping plate, a movable clamping plate horizontally aligned with the fixed clamping plate, and a horizontal drive component that drives the movable clamping plate to move horizontally closer to or away from the fixed clamping plate. The pressure block assembly includes two pressure blocks respectively mounted on the lower end of the fixed clamping plate and the lower end of the movable clamping plate. The two pressure blocks are assembled into a cylindrical shape that can hold the automatic telescopic rod as the movable clamping plate approaches the fixed clamping plate. The upper cover plate has mating holes for the two pressure blocks to pass through.

[0010] Preferably, the fixed clamping plate and the main mounting frame form a vertical guide fit, and a vertical drive component that drives the fixed clamping plate to rise and fall is installed on the main mounting frame. The horizontal drive component is a linear module mounted on the main mounting frame in the horizontal direction. The movable clamping plate and the slider of the linear module form a vertical guide fit, and a vertical drive component that drives the movable clamping plate to rise and fall is installed on the slider of the linear module.

[0011] Preferably, the pressing block is composed of a semi-cylindrical block and a rear protrusion integrally formed at the rear end of the semi-cylindrical block. The rear protrusion is at the same height as the semi-cylindrical block, and a clamping groove is formed between the rear protrusion and the semi-cylindrical block along the axial direction. The fixed clamping plate and the movable clamping plate cooperate with the clamping groove to clamp the pressing block. An annular groove corresponding to the semi-cylindrical block is formed on the automatic telescopic rod. When the two semi-cylindrical blocks are joined together, a cylindrical shape that can cooperate with the annular groove is formed.

[0012] Preferably, a pair of opposing clamping grooves are formed between the semi-cylindrical block and the rear end protrusion. The lower end of the fixed clamping plate and the lower end of the movable clamping plate extend into the clamping grooves to clamp the pressure block. The upper and lower ends of the clamping grooves are chamfered to form an flared shape. The upper and lower ends of the rear end protrusion and the lower end of the semi-cylindrical block are chamfered to form a conical shape that converges towards the end face.

[0013] Preferably, the fixed clamping plate and the movable clamping plate are respectively equipped with automatically retractable clamping telescopic members, and clamping holes corresponding to the clamping telescopic members are opened in the clamping grooves. The clamping telescopic members extend into the clamping holes to position the pressure block on the fixed clamping plate and the movable clamping plate.

[0014] Preferably, the clamping telescopic component is a ball-head plunger or a pin cylinder, and sensors are installed on both the fixed clamping plate and the moving clamping plate. The clamping telescopic component aligns with the clamping hole as the top surface of the semi-cylinder block contacts the sensor.

[0015] Preferably, the automatic nut tightening machine is an adsorption type tightening machine that can adsorb nuts, and there are two of them. One automatic nut tightening machine is mounted vertically on the main body mounting frame and located in front of the fixed clamping plate. The other automatic nut tightening machine is mounted vertically on the slider of the linear module and located in front of the moving clamping plate. The bottom surface of the bushing at the bottom of the automatic nut tightening machine is higher than the bottom surface of the pressure block.

[0016] Preferably, the upper cover plate has a nut placement rod that corresponds one-to-one with the screw and is used to place the nut. The nut placement rod is radially aligned with the corresponding screw and located outside the corresponding screw.

[0017] A stator lamination stacking method, employing the stator lamination stacking die device described above, is characterized by comprising the following steps: S1: Extend the automatic telescopic rod through the upper cover plate; S2: The clamping mechanism drives the pressing mechanism to grip the automatic telescopic rod tightly; S3: The automatic telescopic rod retracts, causing the pressure block mechanism to move downward and disengage from the clamping mechanism, and then inserts into the upper cover plate to press the punch piece until it is pressed into place. S4: Keep the pressure block assembly pressing against the punch plate, and use an automatic nut tightening machine to fasten the nut to the screw; S5: The automatic telescopic rod extends and drives the pressure block mechanism to rise and separate from the upper cover plate to release pressure, thereby assembling the upper cover plate and the stacked stampings into a whole.

[0018] The beneficial effects of this invention are: The stator lamination stacking die device of the present invention includes an automatic telescopic rod mounted on a base, capable of freely passing through the laminations and an upper cover plate. A clamping mechanism is mounted on a multi-degree-of-freedom mobile device. A pressure block assembly and an automatic nut tightening machine are mounted on the clamping mechanism. Before the laminations are pressed, the automatic telescopic rod is extended through the upper cover plate. Then, the clamping mechanism drives the pressure block assembly to hold the automatic telescopic rod tightly. Afterward, the automatic telescopic rod is retracted, causing the pressure block assembly to disengage from the clamping mechanism and insert into the upper cover plate to press the laminations. After the laminations are pressed into place, the automatic nut tightening machine tightens the nuts onto the screws while maintaining pressure. The upper cover plate and the stacked laminations are assembled into a whole by fastening with screws and nuts, forming an automated operation from lamination stacking to nut tightening. This achieves an automated assembly process for lamination stacking and upper cover plate pressing, improves the automation level of stator stacking assembly, reduces manual intervention, and enhances the standardization, safety, and stability of stator stacking assembly operations. It adapts to the sequential stacking assembly of stators in assembly line operations, avoids intermediate products, optimizes the operation process and the utilization rate of work space, effectively shortens the overall production cycle, forms a stable operation rhythm, and improves stator quality. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the stator lamination stacking die device of the present invention.

[0020] Figure 2 This is a schematic diagram of the combination of the clamping assembly, the pressure block assembly, and the automatic nut tightening machine.

[0021] Figure 3 for Figure 2 The front view.

[0022] Figure 4 This is a schematic diagram of a pressing block.

[0023] Figure 5 This is a schematic diagram of the combination of the top cover plate, punch plate, screw, nut and automatic telescopic rod. Detailed Implementation

[0024] The following is combined with Figures 1-5 The embodiments of the present invention will be described in detail below.

[0025] A stator lamination stacking die device includes a base 2 for stacking laminations 1, an upper cover plate 3 covering the laminations 1, and a screw 4 passing through the laminations 1 and the upper cover plate 3. The device is characterized by further including an automatic telescopic rod 5 mounted on the base 1 along the central axis of the laminations and capable of freely extending and retracting through the laminations 1 and the upper cover plate 3; a pressing block assembly 6 for pressing the laminations 1; an automatic nut tightening machine 8 for tightening nuts 7 onto the screw 4; and a clamping mechanism 9 for driving the pressing block assembly 6 and the automatic nut tightening machine 8. The clamping mechanism 9 is mounted on a multi-degree-of-freedom mobile device 10. The pressing block assembly 6 and the automatic nut tightening machine 8 are respectively mounted on the clamping mechanism 9 and located above the upper cover plate 3. When pressing the laminations 1, the pressing block assembly 6 moves with the clamping mechanism 9 to grip the automatic telescopic rod 5 extending from the upper cover plate 3, and as the automatic telescopic rod 5 retracts, it disengages from the clamping mechanism 9 and enters the upper cover plate 3 to press the laminations 1.

[0026] The stator lamination stacking die device described above has an automatic telescopic rod 3 installed on the base 2, which can freely pass through the lamination 1 and the upper cover plate 2. A clamping mechanism 9 is installed on the multi-degree-of-freedom mobile device 10. A pressure block assembly 6 and an automatic nut tightening machine 8 are installed on the clamping mechanism 9. Before the lamination is pressed, the automatic telescopic rod 5 needs to be extended and passed through the upper cover plate 3. Then, the clamping mechanism 9 drives the pressure block assembly 6 to hold the automatic telescopic rod 5 tightly. After that, the automatic telescopic rod 5 is retracted so that the pressure block assembly 6 is separated from the clamping mechanism 9 and passes into the upper cover plate 3 to press the lamination. After the lamination is pressed in place, the automatic nut tightening machine 8 is used to tighten the screw while maintaining pressure. Nut 7 is fastened to screw 4, so that the upper cover plate 3 and the stacked laminations are assembled into a whole by the fastening of screw 4 and nut 7, forming an automated operation from lamination stacking to nut fastening. This realizes the automated assembly process of lamination stacking and upper cover plate pressing, improves the automation level of stator stacking assembly, reduces manual intervention, improves the standardization, safety and stability of stator stacking assembly operation, adapts to the sequential stacking assembly of stators in assembly line operation, avoids intermediate products, optimizes the operation process and the utilization rate of work space, effectively shortens the overall production cycle, forms a stable operation rhythm, and improves stator quality.

[0027] The clamping mechanism 9 includes a main mounting frame 91 mounted on the multi-degree-of-freedom mobile device 10. The main mounting frame 91 is equipped with a fixed clamping plate 92, a movable clamping plate 93 horizontally aligned with the fixed clamping plate 92, and a horizontal driving member 94 that drives the movable clamping plate 93 to move horizontally closer to or away from the fixed clamping plate 92. The pressure block assembly 6 includes two pressure blocks 61 respectively mounted on the lower end of the fixed clamping plate 92 and the lower end of the movable clamping plate 93. The two pressure blocks 61 are assembled into a cylindrical shape that can hold the automatic telescopic rod 5 as the movable clamping plate 93 approaches the fixed clamping plate 92. The upper cover plate 3 has mating holes 31 for the two pressure blocks 61 to pass through. As shown in the figure, the multi-degree-of-freedom mobile device 10 uses a robotic arm. The main mounting frame 91 is equipped with the free end of the multi-degree-of-freedom mobile device 10. The main mounting frame 91 is equipped with a fixed clamping plate 92 and a movable clamping plate 93. The lower ends of the fixed clamping plate 92 and the movable clamping plate 93 are respectively equipped with pressure blocks 61. The movable clamping plate 93 moves closer to or away from the fixed clamping plate 92 under the drive of the horizontal drive member 94. When the movable clamping plate 93 moves closer to the fixed clamping plate 92, the two pressure blocks 61 are combined into a cylindrical shape. When stacking the stamping, the automatic telescopic rod 5 will first extend out of the upper cover plate, and then the movable clamping plate 92 will move closer to the fixed clamping plate 93 so that the two pressure blocks 61 are combined to hug the automatic telescopic rod 5 tightly. When the automatic telescopic rod 5 retracts, it can drive the two pressure blocks 61 to move synchronously, thereby pulling the two pressure blocks 61 into the upper cover plate 3 to press the stamping.

[0028] The fixed clamping plate 92 and the main mounting frame 91 form a vertical guide engagement. A vertical drive member 95 that drives the fixed clamping plate 92 to rise and fall is installed on the main mounting frame 91. The horizontal drive member 94 is a linear module mounted on the main mounting frame 91 in a horizontal direction. The movable clamping plate 93 and the slider of the linear module form a vertical guide engagement. A vertical drive member 95 that drives the movable clamping plate 93 to rise and fall is installed on the slider of the linear module. The horizontal drive component 94 is used to drive the moving clamping plate 93 to move closer to or further away from the fixed clamping plate 92. The vertical drive component 95 is used to drive the fixed clamping plate 92 and the moving clamping plate 93 to rise and fall. It can be used to adjust the vertical position of the pressure head 61 so that when the automatic telescopic rod 5 extends out of the top cover, the pressure head 61 can be aligned with the clamped position of the automatic telescopic rod 5. It can also adjust the vertical position of the fixed clamping plate 92 and the moving clamping plate 93 so that when the nut 7 is tightened on the screw 4, the fixed and moving clamping plates and the pressure head will not interfere with the automatic nut tightening machine, ensuring the rapid switching between the two processes of lamination stacking and nut tightening, and improving the switching cycle of the process in the operation flow.

[0029] The pressing block 61 is composed of a semi-cylindrical block 62 and a rear protrusion 63 integrally formed at the rear end of the semi-cylindrical block 62. The rear protrusion 63 is at the same height as the semi-cylindrical block 62. A clamping groove 64 is formed between the rear protrusion 63 and the semi-cylindrical block 62 along the axial direction. The fixed clamping plate 92 and the movable clamping plate 93 cooperate with the clamping groove 64 to clamp the pressing block 61. The automatic telescopic rod 5 has an annular groove 51 corresponding to the semi-cylindrical block 62. When the two semi-cylindrical blocks 62 are assembled, they form a cylindrical shape that can cooperate with the annular groove 51. As shown in the figure, the semi-cylindrical block 62 and the rear end protrusion 63 are integrally formed, forming a clamping groove 64 between them. The fixed clamping plate 92 and the movable clamping plate 93 both extend into the clamping groove 64 to clamp the pressure block 61. The two semi-cylindrical blocks 62 are assembled to form a cylindrical shape. In the initial state, the two semi-cylindrical blocks 62 are separate and not assembled. Before stacking the stamping, the automatic telescopic rod 5 extends out of the upper cover plate 3. Then, through the movement of the multi-degree-of-freedom mobile device 10, the pressure heads 61 at the lower ends of the fixed clamping plate 92 and the movable clamping plate 93 are horizontally aligned with the annular groove 51, and the pressure head 61 at the lower end of the fixed clamping plate 92 extends into the annular groove 51. Then, through the drive of the horizontal drive member 94, the movable clamping plate 93 moves closer to the fixed clamping plate 92, and the pressure head 61 at the lower end of the movable clamping plate 93 also extends into the annular groove 51 and aligns with the lower end of the fixed clamping plate 92. The pressure head 61 at the end of the device engages and grips the automatic telescopic rod 5. When the automatic telescopic rod retracts, the multi-degree-of-freedom mobile device first descends synchronously with the automatic telescopic rod 5, causing the fixed clamping plate 92, the moving clamping plate 93, and the pressure head 61 to descend synchronously. When the pressure head 61 descends to the upper cover plate 3, the multi-degree-of-freedom mobile device stops descending. At this time, the automatic telescopic rod 5 continues to descend. Through the cooperation between the annular groove 51 and the pressure head 61, the two pressure blocks 61 continue to descend, disengaging from the fixed and moving clamping plates and entering the mating hole 31. The mating hole 31 keeps the two pressure blocks 61 engaged. The continued retraction of the automatic telescopic rod causes the two pressure blocks 61 to gradually press the stamping. When the stamping is stacked in place, the top surface of the pressure head 61 is flush with or slightly higher than the upper cover plate 3, ensuring that the two pressure blocks 61 remain engaged in the mating hole 61 during the stacking process.

[0030] The semi-cylindrical block 62 and the rear end protrusion 63 form a pair of opposing clamping grooves 64. The lower ends of the fixed clamping plate 92 and the lower ends of the movable clamping plate 93 extend into the clamping grooves 64 to clamp the pressure block 51. The upper and lower ends of the clamping grooves 64 are chamfered to form an flared shape. The upper and lower ends of the rear end protrusion 63 and the lower end of the semi-cylindrical block 62 are chamfered to form a conical shape that converges towards the end face. A pair of opposing clamping grooves 64 are provided on the pressure block 61. The upper and lower ends of the clamping grooves 64 are both flared, forming a guide for the lower ends of the fixed and movable clamping plates to extend into the clamping grooves 61, ensuring that the lower ends of the fixed and movable clamping plates can accurately extend into the clamping grooves 61. The upper and lower ends of the rear end protrusion 63 and the lower end of the semi-cylindrical block 62 are all chamfered to form a conical shape that converges towards the end face, forming a guide for the pressure head 61 to pass into the mating hole 31, ensuring that the pressure head 61 can pass into the mating hole 31 as the automatic telescopic rod 5 retracts, improving the structural reliability and the safety of the lamination stacking.

[0031] The fixed clamping plate 92 and the movable clamping plate 93 are respectively equipped with automatically retractable clamping telescopic members. The clamping groove 64 is provided with clamping holes 65 corresponding to the clamping telescopic members. The clamping telescopic members extend into the clamping holes 65 to position the pressure block 61 on the fixed clamping plate 92 and the movable clamping plate 93. The clamping telescopic component can automatically extend and retract. When the pressure block 61 is not inserted into the mating hole 31, the clamping telescopic component extends into the clamping hole 65, positioning the two pressure blocks 61 at the lower end of the fixed clamping plate 92 and the lower end of the movable clamping plate 93, respectively. When the automatic telescopic rod 5 drives the two assembled pressure blocks 61 to enter the upper cover plate 61, the clamping telescopic component shortens and separates from the clamping plate 65, allowing the pressure block 61 to disengage from the fixed clamping plate 92 and the movable clamping plate 93 and enter the mating hole 31. The automatic telescopic function of the clamping telescopic component can not only position the pressure block 61 on the fixed and movable clamping plates, but also enable the pressure block 61 to disengage from the fixed and movable clamping plates in time when the automatic telescopic rod 5 drives the pressure block 61 to enter the mating hole 31, thereby achieving effective stacking of the punching sheets.

[0032] The clamping telescopic component is a ball-headed plunger or a pin cylinder. Sensors 11 are installed on both the fixed clamping plate 92 and the movable clamping plate 93. The clamping telescopic component aligns with the clamping hole as the top surface of the semi-cylindrical block 62 contacts the sensor 11. When the clamping telescopic component is a ball-headed plunger, its ball head extends into the clamping hole 65 when it aligns with the clamping hole 93. When the automatic telescopic rod 5 drives the two pressure blocks 61 into the mating hole 31, the ball head of the ball-headed plunger retracts and separates from the clamping hole 65, allowing the two pressure blocks 61 to disengage from the fixed and movable clamping plates. If the automatic telescopic rod 5 extends and drives the two pressure blocks 61 to rise, causing the clamping hole 65 to realign with the ball-headed plunger, its ball head will re-enter the clamping hole 65. When the clamping telescopic component is a pin cylinder, when the pin cylinder is aligned with the clamping hole 65, the pin of the pin cylinder extends into the clamping hole 65. When the automatic telescopic movement drives the two pressure blocks 61 to pass into the mating hole 31, it is necessary to control the pin of the pin cylinder to retract and separate from the clamping hole 65 so that the two pressure heads 61 can disengage from the fixed and moving clamping plates. If the automatic telescopic rod 5 extends and drives the two pressure heads 65 to rise so that the clamping hole 65 is re-aligned with the pin cylinder, the top surface of the half-cylinder block 62 is in contact with the sensor 11. The sensor 11 will send a signal to control the pin cylinder to re-extend into the clamping hole 65.

[0033] Among them, the automatic nut tightening machine 8 is an adsorption type tightening machine that can adsorb nuts. There are two of them. One automatic nut tightening machine is mounted vertically on the main body mounting frame 91 and located in front of the fixed clamping plate 92. The other automatic nut tightening machine 8 is mounted vertically on the slider of the linear module and located in front of the moving clamping plate 93. The bottom surface of the bushing at the bottom of the automatic nut tightening machine 8 is higher than the bottom surface of the pressure block 61. As shown in the figure, the bottom surface of the automatic nut tightening machine 8 is higher than the bottom surface of the pressure block 61 to avoid interference between the automatic nut tightening machine 8 and the insertion fit between the pressure block 61 and the upper cover plate 6. One automatic nut tightening machine 8 is mounted on the main mounting frame 91 and can only move synchronously with the multi-degree-of-freedom mobile device 10. The other automatic nut tightening machine 8 is mounted on the slider of the linear module and can not only move synchronously with the multi-degree-of-freedom mobile device 10, but also move horizontally synchronously with the horizontal movement of the moving clamping plate to change the distance between the two automatic nut tightening machines 8 so that the distance between the two automatic nut tightening machines 8 can be equal to the distance between the two screws, so that the two automatic nut tightening machines 8 can simultaneously tighten the two nuts 7 onto the two screws 4 respectively.

[0034] The upper cover plate 3 has nut placement rods 32 that correspond one-to-one with the screws 4 and are used to place nuts 7. The nut placement rods 32 are radially aligned with the corresponding screws 4 and located outside the corresponding screws 4. The nut placement rods 32 are used to place nuts on the upper cover plate 3, so that the automatic nut tightening machine 8 can pick up the nuts from the nut placement rods 32 and move them to the screws 4 to tighten the nuts onto the screws. This facilitates the placement of nuts, makes it easier for the automatic nut tightening machine 8 to efficiently pick up nuts, improves operational convenience, and increases the work cycle.

[0035] This invention also protects a stator lamination stacking assembly method, which uses the stator lamination stacking die device described above, characterized by comprising the following steps: S1: Extend the automatic telescopic rod 5 through the upper cover plate 3; S2: The clamping mechanism 9 drives the pressing mechanism 6 to move and clamp the automatic telescopic rod 5; S3: The automatic telescopic rod 5 retracts, causing the pressing block mechanism 6 to move downward and disengage from the clamping mechanism 9, and then inserts into the upper cover plate 3 to press the punch 1 until the punch is pressed into place. S4: Keep the pressure block assembly 6 pressing against the punch plate, and use the automatic nut tightening machine 8 to tighten the nut onto the screw 4; S5: The automatic telescopic rod 5 extends, driving the pressure block mechanism 6 to rise and separate from the upper cover plate 3 to form pressure relief, thereby assembling the upper cover plate and the stacked stamping into a whole.

[0036] The stator lamination stacking assembly method described above forms an automated operation from lamination stacking to nut tightening, realizing an automated assembly process for lamination stacking and upper cover plate pressing, improving the automation level of stator stacking assembly, reducing manual intervention, improving the standardization, safety and stability of stator stacking assembly operations, adapting to the sequential stacking assembly of stators in assembly line operations, avoiding intermediate products, optimizing the operation process and utilization of work space, effectively shortening the overall production cycle, forming a stable operation rhythm, and improving stator quality.

[0037] The specific process of stator lamination stacking assembly using the stator lamination stacking assembly method described above is as follows: First, extend the automatic telescopic rod 5 through the upper cover plate; Next, the multi-degree-of-freedom mobile device 10 moves to align the two pressure blocks 61 with the annular grooves 51 on the automatic telescopic rod 5 horizontally, and the pressure blocks 61 on the fixed clamping plate 92 extend into the annular grooves 51. Then, the horizontal drive member 94 drives the moving clamping plate 93 to move closer to the fixed clamping plate 92, so that the pressure blocks 61 on the moving clamping plate 93 also extend into the annular grooves 51 and join with the pressure blocks 61 on the fixed clamping plate 92 to hold the automatic telescopic rod 5 tightly. Afterwards, the automatic telescopic rod 5 retracts, and the multi-degree-of-freedom mobile device 10 drives the two pressure blocks 61 to descend synchronously with the automatic telescopic rod 5. When the pressure blocks 61 descend to the position of the upper cover plate, the multi-degree-of-freedom mobile device 10 stops moving, the clamping telescopic component retracts and separates from the clamping hole 65, so that the automatic telescopic rod drives the pressure blocks 61 to disengage from the fixed and moving clamping plates and enter the upper cover plate 3 through the mating hole 31 to press the stamping piece until the stamping is pressed into place. Keep the pressure block 61 pressing against the punch plate. Use the vertical drive 95 to drive the fixed and moving clamping plates to rise. Through the movement of the multi-degree-of-freedom moving device 10 and the horizontal drive 94, the two automatic nut tightening machines 8 first pick up the nuts from the nut placement rod 32, then align them with the two screws 4 and put the nuts on the top of the screws 4. Use the automatic nut tightening machines 8 to tighten the nuts on the screws 4 until all the nuts on the screws 4 are tightened. After the nut is tightened, the automatic telescopic rod 5 extends, causing the pressure block 61 to rise and separate from the upper cover plate 3 to release pressure, thus realizing the assembly of the upper cover plate and the stacked punch plate into a whole by tightening the screw 4 and the nut 7.

[0038] The technical solutions of the embodiments of the present invention have been fully described above with reference to the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of the present invention. 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.

Claims

1. A stator lamination stacking die assembly, comprising a base for stacking laminations, an upper cover plate covering the laminations, and a screw passing through the laminations and the upper cover plate, characterized in that: It also includes an automatic telescopic rod mounted on the base along the central axis of the stamping and capable of freely extending and retracting through the stamping and the upper cover plate; a pressure block assembly for pressing the stamping; an automatic nut tightening machine for tightening nuts onto the screw; and a clamping mechanism for driving the pressure block assembly and the automatic nut tightening machine. The clamping mechanism is mounted on a multi-degree-of-freedom mobile device. The pressure block assembly and the automatic nut tightening machine are respectively mounted on the clamping mechanism and located above the upper cover plate. When pressing the stamping, the pressure block assembly moves with the clamping mechanism to hold the automatic telescopic rod extending from the upper cover plate, and as the automatic telescopic rod retracts, it disengages from the clamping mechanism and enters the upper cover plate to press the stamping.

2. The stator lamination stacking die device according to claim 1, characterized in that: The clamping mechanism includes a main mounting frame mounted on a multi-degree-of-freedom mobile device. The main mounting frame is equipped with a fixed clamping plate, a movable clamping plate horizontally aligned with the fixed clamping plate, and a horizontal drive component that drives the movable clamping plate to move horizontally closer to or away from the fixed clamping plate. The pressure block assembly includes two pressure blocks respectively mounted on the lower end of the fixed clamping plate and the lower end of the movable clamping plate. The two pressure blocks are assembled into a cylindrical shape that can hold the automatic telescopic rod as the movable clamping plate approaches the fixed clamping plate. The upper cover plate has mating holes for the two pressure blocks to pass through.

3. The stator lamination stacking die device according to claim 2, characterized in that: The fixed clamping plate and the main mounting frame form a vertical guide fit. A vertical drive component that drives the fixed clamping plate to rise and fall is installed on the main mounting frame. The horizontal drive component is a linear module mounted on the main mounting frame in the horizontal direction. The movable clamping plate and the slider of the linear module form a vertical guide fit. A vertical drive component that drives the movable clamping plate to rise and fall is installed on the slider of the linear module.

4. The stator lamination stacking die device according to claim 3, characterized in that: The pressure block consists of a semi-cylindrical block and a rear protrusion integrally formed at the rear end of the semi-cylindrical block. The rear protrusion is at the same height as the semi-cylindrical block, and a clamping groove is formed between the rear protrusion and the semi-cylindrical block along the axial direction. The fixed clamping plate and the movable clamping plate cooperate with the clamping groove to clamp the pressure block. The automatic telescopic rod has an annular groove corresponding to the semi-cylindrical block. When the two semi-cylindrical blocks are joined together, they form a cylindrical shape that can cooperate with the annular groove.

5. The stator lamination stacking die device according to claim 4, characterized in that: A pair of opposing clamping grooves are formed between the semi-cylindrical block and the rear end protrusion. The lower ends of the fixed clamping plate and the movable clamping plate extend into the clamping grooves to clamp the pressure block. The upper and lower ends of the clamping grooves are chamfered to form an flared shape. The upper and lower ends of the rear end protrusion and the lower end of the semi-cylindrical block are chamfered to form a conical shape that converges towards the end face.

6. The stator lamination stacking die device according to claim 5, characterized in that: The fixed clamping plate and the movable clamping plate are respectively equipped with automatically retractable clamping telescopic components. Clamping holes corresponding to the clamping telescopic components are opened in the clamping grooves. The clamping telescopic components extend into the clamping holes to position the pressure block on the fixed clamping plate and the movable clamping plate.

7. The stator lamination stacking die device according to claim 6, characterized in that: The clamping telescopic component is a ball-head plunger or a pin cylinder. Sensors are installed on both the fixed clamping plate and the moving clamping plate. The clamping telescopic component aligns with the clamping hole as the top surface of the semi-cylinder block contacts the sensor.

8. The stator lamination stacking die device according to claim 3, characterized in that: The automatic nut tightening machine is an adsorption-type tightening machine that can adsorb nuts. There are two such machines. One automatic nut tightening machine is mounted vertically on the main mounting frame and located in front of the fixed clamping plate. The other automatic nut tightening machine is mounted vertically on the slider of the linear module and located in front of the moving clamping plate. The bottom surface of the bushing at the bottom of the automatic nut tightening machine is higher than the bottom surface of the pressure block.

9. The stator lamination stacking die device according to claim 8, characterized in that: The upper cover plate has a nut placement rod that corresponds to a screw and is used to place a nut. The nut placement rod is radially aligned with the corresponding screw and is located outside the corresponding screw.

10. A method for stacking and assembling stator laminations, employing the stator lamination stacking die apparatus according to any one of claims 1 to 9, characterized in that, Includes the following steps: S1: Extend the automatic telescopic rod through the upper cover plate; S2: The clamping mechanism drives the pressing mechanism to grip the automatic telescopic rod tightly; S3: The automatic telescopic rod retracts, causing the pressure block mechanism to move downward and disengage from the clamping mechanism, and then inserts into the upper cover plate to press the punch piece until it is pressed into place. S4: Keep the pressure block assembly pressing against the punch plate, and use an automatic nut tightening machine to fasten the nut to the screw; S5: The automatic telescopic rod extends and drives the pressure block mechanism to rise and separate from the upper cover plate to release pressure, thereby assembling the upper cover plate and the stacked stampings into a whole.

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