Magnetic ring high rotation speed fatigue test system and test method

Abstract

The invention relates to the technical field of motor magnetic ring fatigue testing, in particular to a high-rotating-speed fatigue testing system and method for a magnetic ring. The invention discloses a high-rotating-speed fatigue test system for a magnetic ring. The system comprises test equipment and control equipment, the test equipment comprises a test device and a clamping device. The testing device comprises a driving mechanism and a mounting mechanism, and the driving mechanism drives the mounting mechanism to rotate. The clamping device comprises a supporting mechanism and a clamping mechanism, the supporting mechanism is detachably connected with the mounting mechanism, the clamping mechanism comprises an outer cylinder and an inner cylinder, the magnetic ring is clamped through the outer cylinder and the inner cylinder, the inner diameter of the outer cylinder and the outer diameter of the inner cylinder are adjustable, and the clamping mechanism is fixedly connected with the supporting mechanism. The control equipment comprises a control device and a detection assembly. The control device controls the driving mechanism to act. The detection assembly detects vibration information and temperature information and transmits the information to the control device for calculation and analysis. The high-rotating-speed fatigue test system for the magnetic ring has the advantage that complete and accurate data can be obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of motor magnetic ring fatigue testing, and in particular to a magnetic ring high-speed fatigue testing system and testing method. Background Art

[0002] An important component in rare earth permanent magnet high-speed motors is the neodymium iron boron magnetic ring, which currently has three molding processes: sintering, bonding and injection. High-speed magnets require a rotation speed of generally above 30,000 rpm, with good one-piece molding capabilities to prevent peeling, etc. Permanent magnet cracking is a common problem under high-speed rotation conditions. As the high-speed trend of motors becomes more and more obvious, in these high-speed application scenarios, it is very important to study the fatigue resistance of magnets under high-speed rotation and the quality of the peeling of magnet products. Especially when the magnet is a rotor, the continuous high-speed and high-frequency starting places very stringent requirements on the magnet, and there must be no magnet peeling, etc.

[0003] At present, the above problems are studied and analyzed through software. For example, the Chinese invention patent with publication number CN112632809A proposes a method for calculating the probabilistic life of sintered NdFeB based on a brittle fatigue damage model, establishes a ZWT constitutive model of sintered NdFeB material; calculates the life of sintered NdFeB material, and obtains the life distribution diagram of sintered NdFeB material at different stress levels; establishes a fatigue damage evolution model based on the brittle damage mechanism; fits the fatigue damage evolution model according to the life distribution diagram of sintered NdFeB material, and obtains the parameter distribution of the fatigue damage evolution model when it is used for sintered NdFeB material; calculates the probability density curve of sintered NdFeB material at different stress levels according to the parameter distribution of the damage evolution model when it is used for sintered NdFeB material, combined with the probability density evolution method. However, in the actual operation of the motor, different speeds, operating cycles, frequencies, vibrations, and operations can cause the magnetic ring to heat up, leading to magnetic ring rupture and magnetic powder shedding. The working conditions are complex, and complete and accurate data cannot be obtained simply through software analysis and calculation. Summary of the invention

[0004] In view of this, the present invention aims to provide a high-speed fatigue testing system and method for a magnetic ring, which uses a motor to drive the magnetic ring to perform tests under different high speeds, frequent starts and stops, and frequent changes in speed during operation, to check whether the magnetic ring is cracked or magnetic powder falls off, thereby solving the problem of not being able to obtain complete and accurate data.

[0005] In order to solve the above problems, the present invention provides a magnetic ring high speed fatigue testing system, comprising:

[0006] Test equipment, including:

[0007] The testing device comprises: a driving mechanism and a mounting mechanism, wherein the magnetic ring is mounted by the mounting mechanism, and the mounting mechanism is driven to rotate by the driving mechanism;

[0008] A clamping device, comprising a supporting mechanism and a clamping mechanism, wherein the supporting mechanism is detachably connected to the mounting mechanism, the clamping mechanism comprises an outer cylinder and an inner cylinder, the inner diameter and the outer diameter of the magnetic ring are clamped by the outer cylinder and the inner cylinder, and the inner diameter of the outer cylinder and the outer diameter of the inner cylinder are adjustable, and the clamping mechanism is fixedly connected to the supporting mechanism;

[0009] Control equipment, including:

[0010] A control device for controlling the action of the driving mechanism;

[0011] The detection component detects the vibration information of the driving mechanism and the temperature information of the magnetic ring, and the vibration information and the temperature information are transmitted to the control device for calculation and analysis.

[0012] Further, the support mechanism includes a support assembly and a sleeve;

[0013] The support assembly comprises a support shaft and a connecting piece which are fixedly connected, the connecting piece is fixedly connected to the sleeve, the clamping mechanism is embedded in the sleeve, and the outer sleeve is fixedly connected to the sleeve;

[0014] The supporting shaft is connected to the mounting mechanism.

[0015] Furthermore, the outer cylinder comprises an outer cylinder body and an outer cylinder end plate which are fixedly connected, the outer cylinder end plate is fixedly connected to the sleeve, and there is a gap between the outer peripheral surface of the outer cylinder and the inner diameter of the sleeve.

[0016] Furthermore, the outer cylinder is formed by a first half cylinder and a second half cylinder which are arranged opposite to each other in the axial direction.

[0017] Furthermore, the inner cylinder comprises an inner cylinder body and an inner cylinder end plate which are fixedly connected, and the outer peripheral surface of the inner cylinder body is tapered;

[0018] The inner cylinder and the outer cylinder are inserted into the interior of the sleeve from two sides of the sleeve relative to each other;

[0019] The inner cylinder end plate is located between the connecting member and the sleeve, and the connecting member, the inner cylinder end plate and the sleeve are fixedly connected.

[0020] Further, the mounting mechanism includes a tool handle and a tailstock;

[0021] The knife handle is connected to the driving mechanism, and the support shaft is connected to the knife handle;

[0022] The tailstock comprises an ejector pin, and is abutted and connected with the magnetic ring via the ejector pin.

[0023] Furthermore, the tailstock further comprises a moving mechanism and a moving seat, the ejector pin is fixed on the moving seat, and the moving seat is driven by the moving mechanism to move relative to the driving mechanism;

[0024] The moving mechanism comprises a screw rod, and an internal threaded protrusion is provided at the bottom of the moving seat, and the internal threaded protrusion is threadedly connected with the screw rod.

[0025] Further, the driving mechanism includes a motor;

[0026] The detection component comprises a vibration sensor and a temperature sensor. The vibration sensor is arranged on the motor housing, and the temperature sensor is arranged on the moving seat close to the ejector pin.

[0027] Furthermore, the testing device also includes:

[0028] The outer shell comprises: a bottom plate and a cover shell, the test device is arranged on the bottom plate, and the cover shell is openably connected to the bottom plate;

[0029] The cover is made of transparent material.

[0030] A method for high-speed fatigue testing of a magnetic ring, wherein the method uses a testing system as described above to perform high-speed fatigue testing on a magnetic ring, and the testing method comprises:

[0031] S100, embed the magnetic ring into the outer cylinder, embed the outer cylinder into the sleeve and fixedly connect it to the sleeve, embed the inner cylinder into the sleeve from the other side of the sleeve relative to the outer cylinder, insert the inner cylinder body into the magnetic ring until the conical outer surface tightly abuts against the magnetic ring, fix the support assembly, the inner cylinder and the sleeve, fix the support shaft on the tool handle, and tighten the magnetic ring through the ejector pin of the tailstock;

[0032] S200, detection operation:

[0033] S210, constant speed detection

[0034] S211, starting the driving mechanism at a first preset speed, and repeatedly performing the rotation and stop operations at least twice for at least two preset running times;

[0035] S212, starting the driving mechanism at least at a second preset speed and repeating step S211 detection once;

[0036] S220, speed change detection

[0037] Starting the drive mechanism at a third preset speed, repeatedly performing the rotation and stopping operations at least twice for at least two preset running times, and changing the speed at least once during the running time of the drive mechanism;

[0038] S300, receiving vibration information of the motor and temperature information of the magnetic ring at preset detection time intervals, transmitting the vibration information and temperature information to the control device, and outputting data;

[0039] S400, detect abnormal changes of magnetic ring, including cracks and magnetic powder shedding.

[0040] Compared with the prior art, the magnetic ring high speed fatigue testing system and testing method described in the present invention have the following advantages:

[0041] The advantage of this technical solution is that it uses a motor to drive the magnetic ring to perform tests under different high speeds, frequent starts and stops, and frequent changes in speed during operation to check whether the magnetic ring is broken or the magnetic powder falls off, so as to obtain complete and accurate data. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A three-dimensional diagram of a magnetic ring high-speed fatigue testing system according to an embodiment of the present invention;

[0043] Figure 2 A three-dimensional diagram of a testing device according to an embodiment of the present invention;

[0044] Figure 3 A three-dimensional diagram of a clamping device according to an embodiment of the present invention;

[0045] Figure 4 It is a three-dimensional diagram of a testing device according to an embodiment of the present invention.

[0046] Description of reference numerals:

[0047] 100-testing equipment, 110-clamping device, 111-clamping mechanism, 1111-outer cylinder, 11111-outer cylinder end plate, 11112-outer cylinder body, 1112-inner cylinder, 11121-inner cylinder end plate, 11122-inner cylinder body, 112-supporting mechanism, 1121-supporting assembly, 11211-supporting shaft, 11212-connecting piece, 1122-sleeve, 120-testing device, 121-driving mechanism , 1211-motor, 1212-motor housing, 122-mounting mechanism, 1221-thimble, 1222-tool handle, 1223-tail stock, 12231-moving seat, 12232-moving mechanism, 130-outer shell, 131-cover, 132-bottom plate, 200-control device, 210-control device, 220-detection component, 221-vibration sensor, 222-temperature sensor, 300-magnetic ring. DETAILED DESCRIPTION

[0048] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0049] In the present invention, the descriptions involving "first", "second", "upper", "lower", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "upper", "lower" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the technical solutions between the embodiments can be combined, they are all within the protection scope required by the present invention.

[0050] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0051] like Figure 1 As shown, a magnetic ring high speed fatigue test system includes: a test device 100 and a control device 200. Figure 2 As shown, the testing device 100 includes: a testing device 120 and a clamping device 110. Figure 4 As shown, the testing device 120 includes: a driving mechanism 121 and a mounting mechanism 122, the magnetic ring 300 is mounted by the mounting mechanism 122, and the mounting mechanism 122 is driven to rotate by the driving mechanism 121. Figure 3 As shown, the clamping device 110 includes a supporting mechanism 112 and a clamping mechanism 111, the supporting mechanism 112 is detachably connected to the mounting mechanism 122, the clamping mechanism 111 includes an outer cylinder 1111 and an inner cylinder 1112, the inner diameter and outer diameter of the magnetic ring 300 are clamped by the outer cylinder 1111 and the inner cylinder 1112, and the inner diameter of the outer cylinder 1111 and the outer diameter of the inner cylinder 1112 are adjustable, and the clamping mechanism 111 is fixedly connected to the supporting mechanism 112. The control device 200 includes: a control device 210 and a detection component 220. The control device 210 controls the action of the driving mechanism 121. The detection component 220 detects the vibration information of the driving mechanism 121 and the temperature information of the magnetic ring 300, and the vibration information and the temperature information are transmitted to the control device 210 for calculation and analysis.

[0052] The magnetic ring 300 is driven to rotate by the driving mechanism 121 to perform fatigue resistance test at high speed. The magnetic ring 300 with different inner and outer diameters can be adapted by adjusting the inner diameter of the outer cylinder 1111 and the outer diameter of the inner cylinder 1112. The magnetic ring 300 is clamped by the clamping device 110 and fixed on the testing device 120. The driving mechanism 121 is started by the control device 210. When the magnetic ring 300 rotates at high speed, the vibration information and temperature information of the magnetic ring 300 are detected by the detection component 220. The control device 210 calculates and analyzes the information to obtain the fatigue test result of the magnetic ring 300 under high speed. Compared with the software analysis results, the test system of the present application obtains fatigue results according to actual working conditions under the actual high-speed rotation, and obtains complete and accurate data.

[0053] Further, the support mechanism 112 includes a support assembly 1121 and a sleeve 1122. The support assembly 1121 includes a fixedly connected support shaft 11211 and a connecting member 11212, the connecting member 11212 is fixedly connected to the sleeve 1122, the clamping mechanism 111 is embedded in the sleeve 1122, and the outer cylinder 1111 is fixedly connected to the sleeve 1122. The support shaft 11211 is connected to the mounting mechanism 122.

[0054] The support shaft 11211 of the support assembly 1121 is connected to the mounting mechanism 122, the connecting piece 11212 is fixedly connected to the sleeve 1122, the magnetic ring 300 is embedded in the sleeve 1122 through the clamping mechanism 111, and the clamping mechanism 111 is fixedly connected to the sleeve 1122, so that the power of the driving mechanism 121 can drive the clamping device 110 to rotate.

[0055] Furthermore, the outer cylinder 1111 includes an outer cylinder body 11112 and an outer cylinder end plate 11111 which are fixedly connected. The outer cylinder end plate 11111 is fixedly connected to the sleeve 1122 . There is a gap between the outer circumferential surface of the outer cylinder body 11112 and the inner diameter of the sleeve 1122 .

[0056] The magnetic ring 300 is embedded in the outer cylinder 11112. There is a gap between the outer diameter of the outer cylinder 11112 and the inner diameter of the sleeve 1122, which can accommodate magnetic rings 300 with different outer diameters. The outer cylinder end plate 11111 is fixedly connected to the sleeve 1122 to form a whole. Preferably, the outer cylinder 1111 is made of copper material to facilitate the conduction of the heat generated by the magnetic ring 300 and to facilitate the acquisition of temperature information.

[0057] Furthermore, the outer cylinder 1111 is formed by a first half cylinder and a second half cylinder which are arranged opposite to each other in the axial direction.

[0058] The outer cylinder 1111 is divided into two halves along the axial direction, namely a first half cylinder and a second half cylinder, so as to adapt to the outer diameters of various magnetic rings 300 .

[0059] Further, the inner cylinder 1112 includes an inner cylinder body 11122 and an inner cylinder end plate 11121 which are fixedly connected, and the outer circumferential surface of the inner cylinder body 11122 is tapered. The inner cylinder body 11122 and the outer cylinder body 11112 are inserted into the interior of the sleeve 1122 from both sides of the sleeve 1122. The inner cylinder end plate 11121 is located between the connector 11212 and the sleeve 1122, and the connector 11212, the inner cylinder end plate 11121 and the sleeve 1122 are fixedly connected.

[0060] The outer circumference of the inner cylinder 11122 is conical. After being inserted into the magnetic ring 300, the conical outer circumference can adapt to various inner diameters of the magnetic ring 300. After the outer circumference abuts against the magnetic ring 300, the connector 11212, the inner cylinder end plate 11121 and the sleeve 1122 are fixedly connected to form a whole. After the inner cylinder 11122 abuts against the inner diameter of the magnetic ring 300, the first half cylinder and the second half cylinder of the outer cylinder 1111 are expanded or reduced to adapt to the outer diameter of the magnetic ring 300.

[0061] Further, the mounting mechanism 122 includes a tool handle 1222 and a tailstock 1223. The tool handle 1222 is connected to the driving mechanism 121, and the support shaft 11211 is connected to the tool handle 1222. The tailstock 1223 includes an ejector pin 1221, and is abutted and connected to the magnetic ring 300 via the ejector pin 1221.

[0062] The tool handle 1222 is connected to the driving mechanism 121 . After the support shaft 11211 is inserted into the tool handle 1222 and fixed, the magnetic ring 300 is fixed by the ejector pin 1221 abutting against the end surface of the magnetic ring 300 .

[0063] Further, the tailstock 1223 further includes a moving mechanism 12232 and a moving seat 12231, the ejector pin 1221 is fixed on the moving seat 12231, and the moving seat 12231 is driven by the moving mechanism 12232 to move relative to the driving mechanism 121. The moving mechanism 12232 includes a screw, and an internal threaded protrusion is provided at the bottom of the moving seat 12231, and the internal threaded protrusion is threadedly connected to the screw.

[0064] In order to adapt to the clamping mechanism 111 of various lengths behind the clamping magnetic ring 300 and facilitate installation, the tailstock 1223 is a movable structure. In this embodiment, the movable mechanism 12232 is a screw nut transmission mechanism, and other mechanisms such as hydraulic pressure and electric push rods can also be used.

[0065] Furthermore, the driving mechanism 121 includes a motor 1211 ; the detection component 220 includes a vibration sensor 221 and a temperature sensor 222 , wherein the vibration sensor 221 is disposed on the motor housing 1212 , and the temperature sensor 222 is disposed on the moving seat 12231 close to the ejector pin 1221 .

[0066] The vibration sensor 221 is arranged on the motor housing 1212 to utilize the idle position of the motor housing 1212 and receive accurate vibration information. The copper outer cylinder 1111 is close to the ejector pin 1221, and the temperature sensor 222 is arranged at the idle position of the moving seat 12231 near the ejector pin 1221 to receive accurate temperature information of the magnetic ring 300.

[0067] Furthermore, the test device 100 further includes an outer shell 130, including a bottom plate 132 and a cover shell 131. The test device 100 is disposed on the bottom plate 132, and the cover shell 131 is openably connected to the bottom plate 132. The cover shell 131 is made of a transparent material.

[0068] Preferably, a transparent cover 131 can be provided to prevent the magnetic powder from splashing outside during the test process, thereby preventing personal injury and protecting the environment from being tidy. It can also prevent the components from flying out of the test device 120 due to loose fixation during high-speed operation.

[0069] A method for high-speed fatigue testing of a magnetic ring, wherein the method uses a testing system as described above to perform high-speed fatigue testing on a magnetic ring, and the testing method comprises:

[0070] S100, embed the magnetic ring into the outer cylinder, embed the outer cylinder into the sleeve and fixedly connect it to the sleeve, embed the inner cylinder 1112 into the sleeve from the other side of the sleeve relative to the outer cylinder, insert the inner cylinder 1112 into the magnetic ring until the conical outer surface tightly abuts against the magnetic ring, fix the support assembly, the inner cylinder 1112 and the sleeve, fix the support shaft on the tool handle, and tighten the magnetic ring through the ejector pin of the tailstock;

[0071] S200, detection operation:

[0072] S210, constant speed detection

[0073] S211, starting the driving mechanism at a first preset speed, and repeatedly performing the rotation and stop operations at least twice for at least two preset running times;

[0074] S212, starting the driving mechanism at least at a second preset speed and repeating step S211 detection once;

[0075] S220, speed change detection

[0076] Starting the drive mechanism at a third preset speed, repeatedly performing the rotation and stopping operations at least twice for at least two preset running times, and changing the speed at least once during the running time of the drive mechanism;

[0077] S300, receiving vibration information of the motor and temperature information of the magnetic ring at preset detection time intervals, transmitting the vibration information and temperature information to the control device, and outputting data;

[0078] S400, detect abnormal changes of magnetic ring, including cracks and magnetic powder shedding.

[0079] Preferably, the speed is set at 10000 rpm-50000 rpm. The running time can be 10 minutes, 20 minutes, etc. The above method realizes the test of the fatigue condition of the magnetic ring in various operation processes at different speeds, different running times, different start-stop frequencies, and different speed changes. Complete and accurate data are obtained.

[0080] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A magnetic ring high speed fatigue testing system, characterized in that: include: A testing device (100) comprising: The testing device (120) comprises: a driving mechanism (121) and a mounting mechanism (122), wherein the magnetic ring (300) is mounted via the mounting mechanism (122), and the mounting mechanism (122) is driven to rotate via the driving mechanism (121); A clamping device (110) comprises a supporting mechanism (112) and a clamping mechanism (111), wherein the supporting mechanism (112) is detachably connected to the mounting mechanism (122), and the clamping mechanism (111) comprises an outer cylinder (1111) and an inner cylinder (1112), wherein the inner diameter and the outer diameter of the magnetic ring (300) are clamped by the outer cylinder (1111) and the inner cylinder (1112), and the inner diameter of the outer cylinder (1111) and the outer diameter of the inner cylinder (1112) are adjustable, and the clamping mechanism (111) is fixedly connected to the supporting mechanism (112); A control device (200), comprising: A control device (210) for controlling the operation of the driving mechanism (121); The detection component (220) detects vibration information of the driving mechanism (121) and temperature information of the magnetic ring (300), and the vibration information and the temperature information are transmitted to the control device (210) for calculation and analysis.

2. The magnetic ring high speed fatigue testing system according to claim 1 is characterized in that: The support mechanism (112) comprises a support assembly (1121) and a sleeve (1122); The support assembly (1121) comprises a support shaft (11211) and a connecting piece (11212) which are fixedly connected, the connecting piece (11212) is fixedly connected to the sleeve (1122), the clamping mechanism (111) is embedded in the sleeve (1122), and the outer cylinder (1111) is fixedly connected to the sleeve (1122); The support shaft (11211) is connected to the mounting mechanism (122).

3. The magnetic ring high speed fatigue testing system according to claim 2, characterized in that: The outer cylinder (1111) comprises an outer cylinder body (11112) and an outer cylinder end plate (11111) which are fixedly connected. The outer cylinder end plate (11111) is fixedly connected to the sleeve (1122). There is a gap between the outer circumferential surface of the outer cylinder body (11112) and the inner diameter of the sleeve (1122).

4. The magnetic ring high speed fatigue testing system according to claim 3, characterized in that: The outer cylinder (1111) is formed by a first half cylinder and a second half cylinder which are arranged opposite to each other in the axial direction.

5. The magnetic ring high speed fatigue testing system according to claim 4, characterized in that: The inner cylinder (1112) comprises an inner cylinder body (11122) and an inner cylinder end plate (11121) that are fixedly connected, and the outer peripheral surface of the inner cylinder body (11122) is tapered; The inner cylinder (11122) and the outer cylinder (11112) are inserted into the interior of the sleeve (1122) from two sides of the sleeve (1122) relative to each other; The inner cylinder end plate (11121) is located between the connecting piece (11212) and the sleeve (1122), and the connecting piece (11212), the inner cylinder end plate (11121) and the sleeve (1122) are fixedly connected.

6. The magnetic ring high speed fatigue testing system according to claim 5, characterized in that: The mounting mechanism (122) comprises a tool handle (1222) and a tailstock (1223); The knife handle (1222) is connected to the driving mechanism (121), and the support shaft (11211) is connected to the knife handle (1222); The tailstock (1223) comprises a thimble (1221) and is abutted and connected to the magnetic ring (300) via the thimble (1221).

7. The magnetic ring high speed fatigue testing system according to claim 6, characterized in that: The tailstock (1223) further comprises a moving mechanism (12232) and a moving seat (12231), the ejector pin (1221) is fixed on the moving seat (12231), and the moving seat (12231) is driven by the moving mechanism (12232) to move relative to the driving mechanism (121); The moving mechanism (12232) comprises a screw rod, and an internal threaded protrusion is provided at the bottom of the moving seat (12231), and the internal threaded protrusion is threadedly connected to the screw rod.

8. The magnetic ring high speed fatigue testing system according to claim 7, characterized in that: The driving mechanism (121) comprises a motor housing (1212); The detection component (220) comprises a vibration sensor (221) and a temperature sensor (222); the vibration sensor (221) is arranged on a motor housing (1212); and the temperature sensor (222) is arranged on the movable seat (12231) near the ejector pin (1221).

9. The magnetic ring high speed fatigue testing system according to claim 1, characterized in that: The testing device (100) further comprises: The outer shell (130) comprises: a bottom plate (132) and a cover shell (131), wherein the testing device (100) is arranged on the bottom plate (132), and the cover shell (131) is openably connected to the bottom plate (132); The cover shell (131) is made of transparent material.

10. A magnetic ring high speed fatigue test method, characterized in that: A method for performing a high speed fatigue test on a magnetic ring by using a test system according to any one of claims 1 to 9, the test method comprising: S100, embed the magnetic ring into the outer cylinder, embed the outer cylinder into the sleeve and fixedly connect it to the sleeve, embed the inner cylinder into the sleeve from the other side of the sleeve relative to the outer cylinder, insert the inner cylinder body into the magnetic ring until the conical outer surface tightly abuts against the magnetic ring, fix the support assembly, the inner cylinder and the sleeve, fix the support shaft on the tool handle, and tighten the magnetic ring through the ejector pin of the tailstock; S200, detection operation: S210, constant speed detection S211, starting the driving mechanism at a first preset speed, and repeatedly performing the rotation and stop operations at least twice for at least two preset running times; S212, starting the driving mechanism at least at a second preset speed and repeating step S211 detection once; S220, speed change detection Starting the drive mechanism at a third preset speed, repeatedly performing the rotation and stopping operations at least twice for at least two preset running times, and changing the speed at least once during the running time of the drive mechanism; S300, receiving vibration information of the motor and temperature information of the magnetic ring at preset detection time intervals, transmitting the vibration information and temperature information to the control device, and outputting data; S400, detect abnormal changes of magnetic ring, including cracks and magnetic powder shedding.

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