Tool for turning high-speed motor stator spigot and machining method of tool

Abstract

The invention relates to a tool for turning a high-speed motor stator spigot and a machining method of the tool, and relates to the technical field of high-speed motor stator machining.The tool comprises a stator mandrel, a tensioning part is integrally formed on the outer wall of the stator mandrel, a stator tensioning sleeve is arranged on the outer wall of the tensioning part in a sleeving mode, and the stator tensioning sleeve comprises a connecting ring and a plurality of tensioning strips; the plurality of tensioning strips are fixedly connected with the connecting ring at one end of the connecting ring, the plurality of tensioning strips are uniformly distributed in the circumferential direction of the connecting ring, the outer walls of the tensioning strips abut against the inner wall of the stator core, the inner walls of the tensioning strips abut against the outer wall of the tensioning part, the outer diameter of the tensioning part is gradually reduced in the axial direction of the tensioning part, and the wall thickness of the tensioning strips is gradually increased in the reducing direction of the outer diameter of the tensioning part. The motor base has the effects of ensuring the coaxiality of the spigots at the two ends of the motor base and the stator core and reducing the production cost.

Description

Technical Field

[0001] The present application relates to the technical field of high-speed motor stator processing, and in particular to a tool for turning a stop of a high-speed motor stator and a processing method thereof. Background Art

[0002] High-speed motors play an important role in precision machining, aerospace and many other industrial fields due to their high speed and high efficiency. With the advancement of industrial technology, high-speed motors not only require higher power density and operating stability, but also must have extremely high manufacturing precision. This development trend has prompted high-speed motor manufacturers to continuously seek new ways to improve product quality and technical level to adapt to increasingly demanding application environments.

[0003] Reference Figure 1 In the existing high-speed motor stator manufacturing process, the stator includes a base 100 and a stator core 110, and the base 100 and the stator core 110 are tightly assembled together by a shrink-fit process. The specific assembly steps are as follows: first, heat the casing to a certain temperature so that the casing expands due to the heat, and the inner diameter becomes larger, thereby forming a clearance fit with the stator core 110; while the casing is being heated, place the stator core 110 on the positioning seat, and insert the positioning structure into the stator slot to position the stator core 110; quickly sleeve the heated casing on the positioning boss, at which time the telescopic drive source drives the telescopic guide rod to move and press the inner support slider, so that the inner support slider slides outward along the sliding channel and acts on the inner wall of the casing, thereby positioning the casing on the positioning boss, and the lifting drive source drives the support panel to slide toward the lower base, and the casing moves with the support panel and is accurately sleeved on the stator core 110; as the casing temperature drops, the clearance fit becomes an interference fit, and the casing is firmly sleeved on the outer wall of the stator core 110.

[0004] There are many situations in the shrink-fit process that lead to different coaxiality of the stator core and the machine base after assembly. For example, the thermal expansion coefficients of the stator core and the machine base materials are different, and the expansion amounts are inconsistent when heated, resulting in different contractions of the two during cooling after assembly, thus affecting the coaxiality; in the shrink-fit process, if the casing is heated unevenly, it will lead to different local expansion amounts, and uneven contraction will also occur during cooling after assembly, affecting the coaxiality; during the shrink-fit process, if the assembly force distribution of the stator core and the machine base is uneven, it will also lead to coaxiality differences between the two after assembly; when using the stator core shaft for positioning, if the positioning accuracy of the core shaft is insufficient, or there is an error in the fit between the core shaft and the stator core, it will also lead to coaxiality problems after assembly; inaccurate temperature control during the cooling process, or inconsistent cooling speed, may also lead to coaxiality differences between the stator core and the machine base; during the shrink-fit and cooling process, the uneven release of internal stress in the material may also affect the final coaxiality. Usually, when the coaxiality of the stator core and the base is different, the base and the stator core are disassembled again, and a new base is replaced and reassembled with the stator core through a shrink fit process, which causes material waste and increases production costs. Summary of the invention

[0005] In order to ensure the coaxiality between the stoppers at both ends of the machine base and the stator core and reduce production costs, the present application provides a tool for turning the stoppers of a high-speed motor stator and a processing method thereof.

[0006] In a first aspect, the present application provides a tool for turning a stator stop of a high-speed motor, which adopts the following technical solution: A tool for turning a stopper of a high-speed motor stator comprises a stator core shaft, wherein the outer wall of the stator core shaft is integrally formed with a tensioning portion, the outer wall of the tensioning portion is sleeved with a stator tensioning sleeve, the stator tensioning sleeve comprises a connecting ring and a plurality of tensioning strips, the plurality of tensioning strips are fixedly connected to the connecting ring at one end of the connecting ring, the plurality of tensioning strips are evenly arranged along the circumference of the connecting ring, the outer wall of the tensioning strip abuts against the inner wall of the stator core, the inner wall of the tensioning strip abuts against the outer wall of the tensioning portion, the outer diameter of the tensioning portion gradually decreases along its own axial direction, and the wall thickness of the tensioning strip gradually increases along the direction in which the outer diameter of the tensioning portion decreases.

[0007] By adopting the above technical solution, the stator tension sleeve can be evenly tightened through the conical surface matching design of the stator tension sleeve and the stator core shaft, so that the outer wall of the stator tension sleeve and the inner wall of the stator core in the machine base are tightly fitted together, which can prevent the machine base stop from being deformed during the processing, thereby ensuring the coaxiality of the stop at both ends of the machine base and the stator core, and ensuring the form and position tolerance of the stop at both ends of the machine base, so there is no need to replace the machine base with a different coaxiality with the stator core, thereby reducing material loss and reducing production costs.

[0008] Optionally, two ends of the stator core shaft are provided with center holes.

[0009] By adopting the above technical solution, center holes are opened at both ends of the stator core shaft, which is convenient for positioning and clamping the stator core shaft during processing, thereby ensuring processing accuracy and further ensuring the coaxiality of the stoppers at both ends of the machine base and the stator core.

[0010] Optionally, a pressing sleeve is provided at one end of the connecting ring away from the tensioning strip, and the pressing sleeve is slidably connected to the stator core shaft along the axial direction of the stator core shaft. The end of the pressing sleeve close to the tensioning part abuts against the connecting ring, the inner diameter of the connecting ring is smaller than the outer diameter of the pressing sleeve, and the outer diameter of the connecting ring is not smaller than the inner diameter of the pressing sleeve.

[0011] By adopting the above technical solution, a pressing sleeve is added and the pressing sleeve is slidably connected to the stator core shaft along the axial direction of the stator core shaft, so that the end of the pressing sleeve close to the tensioning part is effectively in contact with the stator tensioning sleeve, ensuring that the stator tensioning sleeve can be stably fitted on the inner wall of the stator core, thereby ensuring the coaxiality of the stoppers at both ends of the machine base and the stator core and the shape and position tolerances of the stoppers at both ends of the machine base, while preventing deformation of the stoppers at the machine base.

[0012] Optionally, a tensioning nut is provided at one end of the pressing sleeve away from the stator tensioning sleeve, the tensioning nut is threadedly connected to the stator core shaft, and one end of the tensioning nut close to the pressing sleeve abuts against the pressing sleeve.

[0013] By adopting the above technical solution, a tensioning nut is added to the end of the pressing sleeve away from the stator tensioning sleeve, and the tensioning nut is threadedly connected to the stator core shaft, while ensuring that the end of the tensioning nut close to the pressing sleeve abuts against the pressing sleeve, thereby achieving effective control of the stator tensioning sleeve, ensuring that the stator tensioning sleeve can be stably opened under stress, and further ensuring the coaxiality of the stoppers at both ends of the machine base and the stator core, avoiding deformation of the stoppers of the machine base due to uneven force.

[0014] Optionally, a push ring is integrally formed on the outer wall of one end of the connecting strip away from the tensioning strip, the outer diameter of the push ring is larger than the inner diameter of the stator core, and the end of the push ring close to the stator core abuts against the stator core.

[0015] By adopting the above technical solution, a push ring is integrally formed on the outer wall of one end of the connecting strip away from the tensioning strip, the outer diameter of the push ring is larger than the inner diameter of the stator core, and the end of the push ring close to the stator core abuts against the stator core, thereby ensuring that the stator tensioning sleeve can stably abut against the stator core during the tensioning process, preventing the tensioning sleeve from shifting in the axial direction, and further ensuring the coaxiality of the stoppers at both ends of the base and the stator core.

[0016] Optionally, a disassembly sleeve is provided at the end of the tensioning part away from the connecting ring, and the disassembly sleeve is slidably connected to the stator core shaft along the axial direction of the stator core shaft. A disassembly ring is fixedly provided at the end of the disassembly sleeve close to the tensioning part, and the end of the disassembly ring away from the disassembly sleeve abuts against the tensioning bar. The outer diameter of the end of the tensioning part close to the disassembly sleeve is not larger than the inner diameter of the disassembly ring, and the inner diameter of the stator core is not smaller than the outer diameter of the disassembly ring.

[0017] By adopting the above technical solution, the removal sleeve is slidably connected with the stator core shaft along the axial direction of the stator core shaft, and can be easily installed and removed. The design that the outer diameter of the end of the tensioning part close to the removal sleeve is not larger than the inner diameter of the removal ring and the inner diameter of the stator core is not smaller than the outer diameter of the removal ring ensures that the removal ring can pass between the tensioning part and the stator core and abut against the stator tensioning sleeve, thereby separating the stator tensioning sleeve from the tensioning part, thereby facilitating the removal of the machine base and improving the processing efficiency.

[0018] Optionally, a disassembly nut is provided at one end of the disassembly sleeve away from the tensioning portion, the disassembly nut is threadedly connected to the stator core shaft, and an end of the disassembly nut close to the disassembly sleeve abuts against the disassembly sleeve.

[0019] By adopting the above technical solution, the disassembly nut is threadedly connected to the stator core shaft and abuts against the disassembly sleeve at one end close to the disassembly sleeve, thereby achieving effective loosening of the stator tension sleeve, facilitating rapid disassembly and replacement of workpieces, thereby improving processing efficiency.

[0020] In a second aspect, the present application provides a processing method for a tool for turning a stopper of a high-speed motor stator, comprising the following steps: S1, drilling center holes on both end faces of the stator core shaft; S2, when turning the tensioner, leave a grinding allowance of about 0.3mm. S3, grinding the tensioning part, turning and grinding need to be processed with the center hole as the positioning reference and processing reference; S4, use a CNC lathe to turn the inner conical surface of the stator tension sleeve to the required size; S5, turning the outer cylindrical surface diameter of the stator tension sleeve, leaving a grinding allowance of 0.3mm; S6, after the turning is completed, the stator tension sleeve is subjected to wire cutting to form a plurality of tension strips arranged at intervals; S7, after the wire cutting process is completed, the stator tension sleeve and the stator core shaft are assembled. During the assembly, the stator tension sleeve is opened by pressing the sleeve, and the opening degree is such that the stator tension sleeve and the stator core shaft do not rotate relative to each other when the outer circle is ground; S8, grinding the outer circle of the stator tension sleeve after assembly to the required size, ensuring the coaxiality and runout of the stator tension sleeve and the stator core shaft, so as to ensure that the coaxiality and runout of the seat 100 and the stator core shaft are consistent when turning the workpiece.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. The stator tension sleeve can be tightened evenly through the cone-shaped matching design between the stator tension sleeve and the stator core shaft, so that the outer wall of the stator tension sleeve and the inner wall of the stator core in the machine base can be closely fitted together, which can prevent the machine base stopper from being deformed during the processing, thereby ensuring the coaxiality of the stoppers at both ends of the machine base and the stator core, and ensuring the form and position tolerance of the stoppers at both ends of the machine base, so there is no need to replace the machine base with different coaxiality with the stator core, reducing material loss and reducing production costs; 2. There are center holes at both ends of the stator core shaft to facilitate the positioning and clamping of the stator core shaft during the processing, thereby ensuring the processing accuracy and further ensuring the coaxiality of the stoppers at both ends of the machine base and the stator core; 3. A press sleeve is added and slidably connected to the stator core shaft along the axial direction of the stator core shaft through the design, so that the end of the press sleeve close to the tensioning part is effectively in contact with the stator tensioning sleeve, ensuring that the stator tensioning sleeve can be stably fitted on the inner wall of the stator core, thereby ensuring the coaxiality of the stoppers at both ends of the machine base and the stator core and the shape and position tolerances of the stoppers at both ends of the machine base, while preventing deformation of the stoppers of the machine base. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of the base.

[0023] Figure 2 It is a schematic diagram of the overall structure of a tool for turning a stator stop of a high-speed motor in Example 1.

[0024] Figure 3 yes Figure 2 Schematic cross-section diagram of .

[0025] Figure 4 It is a structural schematic diagram of the stator tensioner.

[0026] Explanation of the reference numerals: 100, machine base; 110, stator core; 1, stator core shaft; 11, tensioning part; 12, center hole; 2, stator tensioning sleeve; 21, connecting ring; 22, tensioning strip; 23, push ring; 3, pressing sleeve; 4, tensioning nut; 5, sleeve removal; 51, ring removal; 6, nut removal. DETAILED DESCRIPTION

[0027] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0028] In a first aspect, an embodiment of the present application discloses a tool for turning a stopper of a high-speed motor stator.

[0029] Reference Figure 2 , a tool for turning a stator stop of a high-speed motor, comprising a stator core shaft 1.

[0030] Reference Figure 3The stator core shaft 1 has an integrally formed outer wall with a tensioning portion 11, which is made of high-strength alloy steel, with high hardness and good wear resistance, ensuring that it is not easy to wear and deform during long-term use. The outer diameter of the tensioning portion 11 gradually decreases along the axial direction, thereby forming a conical surface so that the stator tension sleeve 2 can be evenly tightened on its surface.

[0031] Reference Figure 3 The stator core shaft 1 is provided with a center hole 12 at both ends for positioning and machining reference, which is convenient for positioning and clamping the stator core shaft 1 during machining, thereby ensuring machining accuracy and further ensuring the coaxiality between the stoppers at both ends of the machine base 100 and the stator core. The diameter of the center hole 12 can be determined according to specific machining equipment and technical parameters.

[0032] Reference Figure 3 The outer wall of the tensioning part 11 is sleeved with a stator tensioning sleeve 2, and the stator tensioning sleeve 2 includes a connecting ring 21 and a plurality of tensioning strips 22. The plurality of tensioning strips 22 are fixedly connected to the connecting ring 21 at one end of the connecting ring 21, and the plurality of tensioning strips 22 are evenly arranged along the circumference of the connecting ring 21. The outer wall of the tensioning strip 22 abuts against the inner wall of the stator core 110, and the inner wall of the tensioning strip 22 abuts against the outer wall of the tensioning part 11. The wall thickness of the tensioning strip 22 gradually increases along the direction in which the outer diameter of the tensioning part 11 decreases. The gap between adjacent tensioning strips 22 communicates the inner wall and the outer wall of the stator tensioning sleeve 2. This design allows the tensioning strips 22 to expand evenly under the action of external force, so as to better fit the surface of the stator core shaft 1. The number of tensioning strips 22 can be determined according to actual needs, and the length can be set according to specific circumstances. The material of the stator tensioning sleeve 2 can be selected from high-strength alloy steel, such as 42CrMoA or 40CrNiMoA, to improve fatigue life.

[0033] By means of the conical matching design of the tension strip 22 and the stator core shaft 1, the stator tension sleeve 2 can be uniformly tightened, so that the outer wall of the tension strip 22 and the inner wall of the stator core 110 in the machine base 100 are tightly fitted together, which can prevent the stopper of the machine base 100 from being deformed during the processing, thereby ensuring the coaxiality of the stoppers at both ends of the machine base 100 and the stator core, and ensuring the shape and position tolerances of the stoppers at both ends of the machine base 100.

[0034] Reference Figure 3 and Figure 4 Specifically, a push ring 23 is integrally formed on the outer wall of one end of the connecting strip away from the tensioning strip 22. The push ring 23 is mainly used for auxiliary positioning, and its outer diameter is larger than the inner diameter of the stator core 110, so that the push ring 23 can maintain stable contact with the stator core 110.

[0035] Reference Figure 2 and Figure 3, a pressing sleeve 3 is provided at one end of the connecting ring 21 away from the tensioning strip 22. The pressing sleeve 3 is slidably connected to the stator core shaft 1 along the axial direction of the stator core shaft 1, and the pressing sleeve 3 abuts against the connecting ring 21 close to the tensioning part 11 to drive the stator tensioning sleeve 2 to move, so that the stator tensioning sleeve 2 and the tensioning part 11 fit tightly together. The inner diameter of the connecting ring 21 is smaller than the outer diameter of the pressing sleeve 3, and the outer diameter of the connecting ring 21 is not smaller than the inner diameter of the pressing sleeve 3. This design ensures that during the assembly process, the pressing sleeve 3 can apply pressure to the stator tensioning sleeve 2 in the axial direction, so that the stator tensioning sleeve 2 and the stator core shaft 1 fit tightly, enhancing the overall structural stability. The pressing sleeve 3 can be made of brass or bronze material, which has good plasticity and toughness, and is easy to process and adjust. The guide surface inside the pressing sleeve 3 is finely processed to ensure good fit with the stator core shaft 1.

[0036] Reference Figure 2 and Figure 3 , a tensioning nut 4 is provided at one end of the pressing sleeve 3 away from the stator tensioning sleeve 2. The tensioning nut 4 is threadedly connected to the stator core shaft 1, and the precision requirement of the threaded connection part is very high, generally needing to reach the tolerance grade of 6H / 6g level. The end of the tensioning nut 4 close to the pressing sleeve 3 abuts against the pressing sleeve 3, and the position of the pressing sleeve 3 is adjusted by rotating the tensioning nut 4 to achieve pressure control of the stator tensioning sleeve 2. The tensioning nut 4 is made of brass material, which has good self-lubrication and wear resistance. The end of the tensioning nut 4 close to the pressing sleeve 3 abuts against the pressing sleeve 3 to ensure that the force of the tensioning nut 4 can be directly transmitted to the pressing sleeve 3, and then act on the stator tensioning sleeve 2. The nut material can be selected from high-strength steel or alloy steel, such as 40Cr or 35CrMo, to ensure sufficient load-bearing capacity and durability. The thread surface needs to be chrome-plated or nitrided to enhance corrosion resistance.

[0037] Reference Figure 2 and Figure 3 , a disassembly sleeve 5 is provided at one end of the tensioning part 11 away from the connecting ring 21. The disassembly sleeve 5 is mainly used to simplify the loading and unloading process and improve production efficiency. The disassembly sleeve 5 is slidably connected to the stator core shaft 1 along the axial direction of the stator core shaft 1, and can be easily disassembled without destroying the original fit. A disassembly ring 51 is fixedly provided at one end of the disassembly sleeve 5 close to the tensioning part 11, and the end of the disassembly ring 51 away from the disassembly sleeve 5 abuts against the stator tension sleeve 2. The outer diameter of the end of the tensioning part 11 close to the disassembly sleeve 5 is not greater than the inner diameter of the disassembly ring 51, and the inner diameter of the stator core 110 is not less than the outer diameter of the disassembly ring 51. This design can ensure that the disassembly ring 51 can smoothly pass through the space between the tensioning part 11 and the stator core 110 and abut against the stator tension sleeve 2, thereby separating the stator tension sleeve 2 from the tensioning part 11, which is convenient for quick disassembly and replacement of workpieces. The material of the disassembly sleeve 5 can also be selected from high-strength steel or alloy steel.

[0038] Reference Figure 2 and Figure 3A disassembly nut 6 is provided at one end of the disassembly sleeve 5 away from the tensioning part 11. The disassembly nut 6 is threadedly connected to the stator core shaft 1. The disassembly nut 6 is made of low-carbon steel material with good plasticity and toughness. The end of the disassembly nut 6 close to the disassembly sleeve 5 abuts against the disassembly sleeve 5 to effectively loosen the stator tension sleeve 2, which is convenient for rapid disassembly and replacement of workpieces, thereby improving processing efficiency.

[0039] The embodiment of the present application discloses a method for using a tool for turning a stopper of a high-speed motor stator, comprising the following steps: initially sleeve a stator tension sleeve 2 outside a tensioning portion 11, sleeve a pressing sleeve 3 on a stator core shaft 1, and rotate a tensioning nut 4 to make the pressing sleeve 3 abut against a push ring 23; sleeve a machine base 100 outside the stator tension sleeve 2 to make the push ring 23 abut against a stator core 110; continue to rotate the tensioning nut 4 using a tool to move the stator tension sleeve 2 along the axial direction of the stator core shaft 1, and under the action of a tensioning strip 22, the stator tension sleeve 2 The inner wall fits with the tensioning part 11, and the outer wall of the stator tensioning sleeve 2 fits with the inner wall of the stator core 110, so that the three are fastened together to achieve synchronous rotation; after the machine base 100 is processed, a disassembly sleeve 5 is sleeved on the end of the stator core shaft 1 away from the pressing sleeve 3, and the disassembly nut 6 is rotated to drive the disassembly sleeve 5 to move along the axial direction of the stator core shaft 1, and the disassembly sleeve 5 drives the disassembly ring 51 to move, and the disassembly ring 51 passes through between the tensioning part 11 and the stator core 110 and abuts against the stator tensioning sleeve 2, and the disassembly nut 6 is continued to be rotated to separate the stator tensioning sleeve 2 from the tensioning part 11.

[0040] The implementation principle of this embodiment is that the stator tension sleeve 2 can be uniformly tightened through the conical surface matching design of the stator tension sleeve 2 and the stator core shaft 1, so that the outer wall of the stator tension sleeve 2 and the inner wall of the stator core 110 in the machine base 100 are tightly fitted together, which can prevent the stopper of the machine base 100 from being deformed during the processing, thereby ensuring the coaxiality of the stoppers at both ends of the machine base 100 and the stator core, and ensuring the shape and position tolerances of the stoppers at both ends of the machine base 100.

[0041] On the other hand, a processing method of a tool for turning a stopper of a high-speed motor stator comprises the following steps: S1, the stator core shaft is an outer conical surface, and a center hole 12 is drilled on both end surfaces of the stator core shaft 1 to facilitate the subsequent positioning of the outer conical surface of the stator core shaft 1 when grinding and processing the machine base 100; S2, when turning the tensioning part 11, a grinding allowance of about 0.3 mm is left. S3, grinding the tensioning part 11, the turning and grinding need to be processed with the center hole 12 as the positioning reference and processing reference to prevent the outer conical surface of the stator core shaft from not fitting with the inner conical surface of the stator tension sleeve 2; S4, the inner circle of the stator tension sleeve 2 is an inner conical surface, and the outer circle is a cylindrical surface. The inner conical surface of the stator tension sleeve 2 is turned to the required size using a CNC lathe; S5, turning the outer cylindrical surface diameter of the stator tension sleeve 2 leaving a grinding allowance of 0.3mm; S6, after the turning is completed, the stator tension sleeve 2 is subjected to wire cutting to form a plurality of tension strips 22 arranged at intervals; S7, after the wire cutting process is completed, the stator tension sleeve 2 and the stator core shaft 1 are assembled. During the assembly, the tension nut 4 is rotated to push the pressing sleeve 3 to move so that the stator tension sleeve 2 is opened. The opening degree is such that the stator tension sleeve 2 and the stator core shaft 1 do not rotate relative to each other when the outer circle is ground; S8, grinding the outer circle of the stator tension sleeve 2 after assembly to the required size, ensuring the coaxiality and runout of the stator tension sleeve 2 and the stator core shaft 1, so as to ensure that the coaxiality and runout of the seat 100 and the stator core shaft 1 are consistent when turning the workpiece.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A tool for turning the stopper of a high-speed motor stator, characterized in that: The invention comprises a stator core shaft (1), wherein the outer wall of the stator core shaft (1) is integrally formed with a tensioning portion (11), the outer wall of the tensioning portion (11) is sleeved with a stator tensioning sleeve (2), the stator tensioning sleeve (2) comprises a connecting ring (21) and a plurality of tensioning strips (22), the plurality of tensioning strips (22) are fixedly connected to the connecting ring (21) at one end of the connecting ring (21), the plurality of tensioning strips (22) are evenly arranged along the circumference of the connecting ring (21), the outer wall of the tensioning strip (22) abuts against the inner wall of the stator core (110), the inner wall of the tensioning strip (22) abuts against the outer wall of the tensioning portion (11), the outer diameter of the tensioning portion (11) gradually decreases along its own axial direction, and the wall thickness of the tensioning strip (22) gradually increases along the direction in which the outer diameter of the tensioning portion (11) decreases.

2. A tool for turning the stator stop of a high-speed motor according to claim 1, characterized in that: Central holes (12) are formed at both ends of the stator core shaft (1).

3. A tool for turning the stopper of a high-speed motor stator according to claim 2, characterized in that: A pressing sleeve (3) is provided at one end of the connecting ring (21) away from the tensioning strip (22); the pressing sleeve (3) is slidably connected to the stator core shaft (1) along the axial direction of the stator core shaft (1); one end of the pressing sleeve (3) close to the tensioning portion (11) abuts against the connecting ring (21); the inner diameter of the connecting ring (21) is smaller than the outer diameter of the pressing sleeve (3); and the outer diameter of the connecting ring (21) is not smaller than the inner diameter of the pressing sleeve (3).

4. A tool for turning the stator stop of a high-speed motor according to claim 3, characterized in that: A tensioning nut (4) is provided at one end of the pressing sleeve (3) away from the stator tensioning sleeve (2); the tensioning nut (4) is threadedly connected to the stator core shaft (1); and an end of the tensioning nut (4) close to the pressing sleeve (3) abuts against the pressing sleeve (3).

5. The tool for turning the stator stop of a high-speed motor according to claim 2, characterized in that: A push ring (23) is integrally formed on the outer wall of one end of the connecting strip away from the tensioning strip (22); the outer diameter of the push ring (23) is greater than the inner diameter of the stator core (110); and the end of the push ring (23) close to the stator core (110) abuts against the stator core (110).

6. The tool for turning the stopper of a high-speed motor stator according to claim 2, characterized in that: A disassembly sleeve (5) is provided at one end of the tensioning part (11) away from the connecting ring (21); the disassembly sleeve (5) is slidably connected to the stator core shaft (1) along the axial direction of the stator core shaft (1); a disassembly ring (51) is fixedly provided at one end of the disassembly sleeve (5) close to the tensioning part (11); an end of the disassembly ring (51) away from the disassembly sleeve (5) abuts against the tensioning strip (22); an outer diameter of the end of the tensioning part (11) close to the disassembly sleeve (5) is not greater than an inner diameter of the disassembly ring (51); and an inner diameter of the stator core (110) is not less than an outer diameter of the disassembly ring (51).

7. A tool for turning the stopper of a high-speed motor stator according to claim 6, characterized in that: A disassembly nut (6) is provided at one end of the disassembly sleeve (5) away from the tensioning portion (11); the disassembly nut (6) is threadedly connected to the stator core shaft (1); and an end of the disassembly nut (6) close to the disassembly sleeve (5) abuts against the disassembly sleeve (5).

8. A method for machining a tool for turning a stopper of a high-speed motor stator according to any one of claims 2 to 7, characterized in that: The steps include: S1, drilling center holes (12) on both end surfaces of the stator core shaft (1); S2, when turning the tensioner (11), leave a grinding margin of about 0.3 mm. S3, grinding the tensioning part (11), the turning and grinding need to be performed with the center hole (12) as the positioning reference and processing reference; S4, using a CNC lathe to turn the inner conical surface of the stator tension sleeve (2) to the required size; S5, turning the outer cylindrical surface of the stator tension sleeve (2) with a grinding allowance of 0.3 mm; S6, after the turning is completed, the stator tension sleeve (2) is subjected to wire cutting to form a plurality of tension strips (22) arranged at intervals; S7, after the wire cutting process is completed, the stator tension sleeve (2) and the stator core shaft (1) are assembled. During the assembly, the stator tension sleeve (2) is opened by the pressing sleeve (3). The opening degree is such that the stator tension sleeve (2) and the stator core shaft (1) do not rotate relative to each other when the outer circle is ground; S8, after assembly, the outer circle of the stator tension sleeve (2) is ground to the required size to ensure the coaxiality and runout of the stator tension sleeve (2) and the stator core shaft (1), so as to ensure that the coaxiality and runout of the seat (100) and the stator core shaft (1) are consistent when turning the workpiece.

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