Device and method for quantitatively detecting static balance of a cathode roller

Abstract

The application provides a device and method for quantitatively detecting static balance of a cathode roller. The device provides horizontal support for the cathode roller to be detected through a flat base. The top of a support frame assembly supports the cathode roller to be detected through a roller assembly, so as to reduce unstable rotation of the cathode roller to be detected due to friction. A torque sensor is arranged between a first flexible diaphragm coupling and a second flexible diaphragm coupling to jointly form a radial load decoupling mechanism. The radial load decoupling mechanism utilizes the elastic deformation ability of the flexible metal diaphragms of the first flexible diaphragm coupling and the second flexible diaphragm coupling in the axial and radial directions to block the transmission of non-circumferential shear force generated by the self-weight deflection of the cathode roller to be detected to the torque sensor, so that the real-time torque collected by the torque sensor is only a pure torsional moment. The radial additional force interference caused by the self-weight and eccentric deflection is eliminated, and the realness and accuracy of torque measurement are greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of static balance detection technology, specifically relating to a device and method for quantitatively detecting the static balance of a cathode roller. Background Technology

[0002] In many industrial sectors such as machinery manufacturing, metallurgy, and power, rotating bodies are core components of various rotating equipment and complete sets of units. Their machining accuracy and operational stability directly affect the operating efficiency, service life, and safety performance of the entire equipment. During the batch processing and assembly of rotating bodies, the finished products are prone to static imbalance due to multiple objective factors such as raw material characteristics, processing technology, and assembly operations. This becomes a key hidden danger restricting the high-quality operation of the equipment. In an ideal state, the center of mass of a standard rotating body is perfectly aligned with the center of rotation, resulting in smooth and deviation-free operation. However, in actual production, rotating components such as rotors and cathode rollers generally have varying degrees of center of mass misalignment, leading to a fixed amount of static imbalance that adversely affects the product's performance.

[0003] The causes of static imbalance in rotating bodies are complex and cannot be completely avoided throughout the entire process from raw material processing to finished product assembly. Firstly, there is the uneven distribution of raw material material. During the smelting and rolling processes of industrial metal raw materials, natural material defects such as micropores, impurity segregation, and uneven density are easily generated, leading to differences in the mass distribution of different areas of the rotating body blank. Even with subsequent standardized precision machining, it is impossible to completely eliminate the quality deviations caused by the material itself. Secondly, there are machining errors. In core machining processes such as turning, grinding, and drilling, machine tool system deviations, tool wear, inaccurate tooling and fixture positioning, as well as equipment vibration and workpiece thermal deformation during processing, can all cause subtle errors in key parameters such as the outer diameter, wall thickness, and coaxiality of the rotating body, directly resulting in an imbalance in the component's mass distribution. Furthermore, problems such as component misalignment, uneven fit clearances, and inconsistent fastener tightness during assembly can further exacerbate the center of gravity shift, causing the static imbalance of the finished product to exceed industry standards.

[0004] Currently, the industry still widely uses traditional guide rail static balancing frame testing for static balance testing of large rotating bodies such as cathode rollers. This testing method is outdated and has poor adaptability and accuracy. This process relies entirely on manual operation. Workers manually rotate the roller slowly on the guide rail, visually observe the deflection state of the component after it comes to rest, and subjectively judge the direction and approximate amount of the center of gravity shift based on personal experience. The deviation is then gradually corrected by adding counterweights and repeatedly rotating the roller for verification. This manual adjustment method is cumbersome and redundant. A single static balance test and counterweight optimization of a cathode roller requires several operators to work together for several hours, resulting in extremely high labor and time costs. This severely reduces the efficiency of product inspection before shipment and cannot keep up with the pace of modern industrial mass production. Summary of the Invention

[0005] To address the technical problems of time-consuming, labor-intensive, and inaccurate counterweighting of rotating bodies in existing technologies, this application provides a device and method for quantitatively detecting the static balance of a cathode roller.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] In a first aspect, this application provides a device for quantitatively detecting the static balance of a cathode roller, including a flat base and a support frame assembly spaced apart on the upper surface of the flat base. The top of the support frame assembly is supported by a roller assembly, and one end of the cathode roller is connected to a servo motor via a servo drive assembly. The servo motor is connected to a processor.

[0008] The servo drive assembly includes a first flexible diaphragm coupling, a torque limiter, a torque sensor, a second flexible diaphragm coupling, and a reducer, which are sequentially and coaxially connected. The first flexible diaphragm coupling is fixedly connected to the end of the cathode roller to be tested, and the reducer is connected to the servo motor.

[0009] The processor is electrically connected to the torque sensor and the servo motor.

[0010] Furthermore, the upper surface of the flat base is provided with multiple parallel slide rails spaced apart, and the bottom surface of the support frame assembly is provided with sliders adapted to the slide rails, as well as locking components.

[0011] Furthermore, the support frame assembly includes a base plate and a top plate, and a column disposed between the base plate and the top plate, and a wing plate is also disposed between the base plate and the column;

[0012] The roller assembly includes a roller seat disposed on the upper surface of the top plate, and rollers disposed on the roller seat via bearings.

[0013] Furthermore, the passive end flange of the first flexible diaphragm coupling is fixedly connected to the end of the cathode roller under test, the drive end flange of the first flexible diaphragm coupling is connected to the input end flange of the torque limiter, the output end flange of the torque limiter is fixedly connected to the input end flange of the torque sensor, the output end flange of the torque sensor is fixedly connected to the passive end flange of the second flexible diaphragm coupling, the drive end flange of the second flexible diaphragm coupling is fixedly connected to the output end of the reducer, the input end housing of the reducer is connected to the front end cover of the servo motor through an transition flange, and the output shaft of the servo motor is fixedly connected to the input shaft hole of the reducer.

[0014] Furthermore, the processor includes a central control unit, a data acquisition unit, a drive control unit, and a human-machine interaction unit, wherein:

[0015] The data acquisition unit is used to acquire real-time torque information from the torque sensor and send it to the central control unit;

[0016] The servo motor is equipped with an encoder, and the drive control unit is electrically connected to the encoder and the central control unit respectively.

[0017] The human-computer interaction unit is electrically connected to the central control unit.

[0018] In a second aspect, this application discloses a method for quantitatively detecting the static balance of a cathode roller, comprising the following steps:

[0019] The cathode roller to be tested is supported on the roller assembly, the servo motor is started, and the servo drive assembly drives the cathode roller to rotate at a constant speed.

[0020] The processor acquires the real-time torque from the torque sensor and the rotation angle of the servo motor's output shaft.

[0021] Based on the real-time torque and rotation angle, the weight and placement position of the counterweight are obtained using sine function theory.

[0022] Furthermore, the weight of the counterweight include:

[0023] ;

[0024] In the formula, It prioritizes torque; It is the acceleration due to gravity; The distance is the rotation center of the cathode roller to be tested to the counterweight ring;

[0025] ;

[0026] In the formula, This represents the maximum real-time torque. This represents the minimum real-time torque.

[0027] Furthermore, when the counterweight position is obtained based on the aforementioned sine function theory, the processor is configured to perform the following steps:

[0028] Based on the aforementioned sine function theory, the torque-angle waveform relationship is constructed as follows:

[0029] ;

[0030] In the formula, For real-time torque; It prioritizes torque; This represents the real-time rotation angle of the cathode roller under test. The eccentricity angle of the cathode roller to be tested; The amplitude shift due to friction is a constant.

[0031] Based on the sum-to-product method, we obtain:

[0032] ;

[0033] make ;

[0034] but: Multiply both sides of the equation or And sum all the data points of the cathode roller (4) under test within one sampling period to obtain:

[0035] ;

[0036] One sampling period refers to the time it takes for the cathode roller under test to rotate 360°.

[0037] Within a sampling period, the following exists:

[0038] =0; =0; = ;

[0039] as well as, =0; = 0; = ;

[0040] get: , ;

[0041] but Introducing the arctangent function atan2 in the four quadrants, we obtain ;

[0042] Based on eccentricity angle , making the eccentric angle Then, the intersection with the counterweight ring is taken as the counterweight position.

[0043] Furthermore, a torque-angle waveform diagram is constructed based on the real-time torque and rotation angle, and a torque-angle waveform relationship is constructed based on the torque-angle waveform diagram.

[0044] Furthermore, the sampling frequency of the torque sensor is ≥1000Hz, and the accuracy error is ≤0.1%FS.

[0045] Compared with the prior art, the present invention has the following beneficial technical effects:

[0046] This application provides a device and method for quantitatively detecting the static balance of a cathode roller. The device provides horizontal support for the cathode roller under test via a flat base. The top of the support frame assembly supports the cathode roller under test via a roller assembly to reduce unstable rotation caused by friction. A torque sensor is installed between a first flexible diaphragm coupling and a second flexible diaphragm coupling, forming a radial load decoupling mechanism. This mechanism utilizes the elastic deformation capability of the flexible metal diaphragms of the first and second flexible diaphragm couplings in the axial and radial directions to block the transmission of non-circumferential shear force generated by the deflection of the cathode roller under test due to its own weight to the torque sensor. This ensures that the real-time torque collected by the torque sensor is only a pure torsional moment, eliminating the radial additional force interference caused by self-weight and eccentric deflection, significantly improving the accuracy and reliability of torque measurement. This method, by collecting real-time torque and rotation angle, can quantitatively detect the static balance of the cathode roller using sine function theory, accurately determining the counterweight weight and placement position of the cathode roller under test. It eliminates the detection blind zone caused by contact friction in traditional gravity-based static balancing, greatly improving detection accuracy. Attached Figure Description

[0047] Figure 1 A schematic diagram of a device for quantitatively detecting the static balance of a cathode roller in an embodiment of this disclosure is shown;

[0048] Figure 2 A schematic diagram of the servo drive component in an embodiment of this disclosure is shown;

[0049] Figure 3 A torque-angle waveform diagram from an embodiment of this disclosure is shown;

[0050] Figure 4 A schematic diagram illustrating the theoretical principle of the sine function in an embodiment of this disclosure is shown.

[0051] In the diagram: 1-Plate base; 2-Support frame assembly; 3-Roller assembly; 4-Cathode roller under test; 5-Servo drive assembly; 6-Servo motor; 7-Processor; 51-First flexible diaphragm coupling; 52-Torque limiter; 53-Torque sensor; 54-Second flexible diaphragm coupling; 55-Reducer; 21-Base plate; 22-Top plate; 23-Column; 24-Wing plate; 31-Roller seat; 32-Roller. Detailed Implementation

[0052] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0053] Figure 1 A schematic diagram of an apparatus for quantitatively detecting the static balance of a cathode roller according to an embodiment of the present disclosure is shown, as follows: Figure 1As shown, it includes a flat base 1 and a support frame assembly 2 spaced apart on the upper surface of the flat base 1. The top of the support frame assembly 2 is supported by a roller assembly 3, and a cathode roller 4 to be tested is supported by a roller assembly 3. One end of the cathode roller 4 to be tested is connected to a servo motor 6 through a servo drive assembly 5. The servo motor 6 is connected to a processor 7.

[0054] The servo drive assembly 5 includes a first flexible diaphragm coupling 51, a torque limiter 52, a torque sensor 53, a second flexible diaphragm coupling 54, and a reducer 55, which are connected in sequence and coaxially. The first flexible diaphragm coupling 51 is fixedly connected to the end of the cathode roller 4 to be tested, and the reducer 55 is connected to the servo motor 6.

[0055] The processor 7 is electrically connected to the torque sensor 53 and the servo motor 6.

[0056] In this embodiment, multiple slide rails are arranged parallel to each other at intervals on the upper surface of the flat base 1, and a slider adapted to the slide rails and a locking component are provided on the bottom surface of the support frame assembly 2. Specifically, the flat base 1 is horizontally arranged, the slide rails are perpendicular to the vertical projection of the cathode roller 4 to be tested, the slide rails are raised tracks, the sliders are concave structures adapted to the slide rail structure, the sliders are fixedly set on the lower surface of the base plate 21, and a locking component, which is a locking bolt, is provided on the side wall of the slider. The relative fixation of the slide rails and the slider is achieved by tightening and pressing the slide rails.

[0057] In this embodiment, the support frame assembly 2 includes a base plate 21 and a top plate 22, and a column 23 disposed between the base plate 21 and the top plate 22. A wing plate 24 is also disposed between the base plate 21 and the column 23. The roller assembly 3 includes a roller seat 31 disposed on the upper surface of the top plate 22, and rollers 32 disposed on the roller seat 31 via bearings. Specifically, there are four sets of support frame assemblies 2, which are distributed in a matrix on the upper surface of the flat base 1. Two sets of support frame assemblies 2 located on the same track are used to support the uniform radial cross section of the cathode roller 4 to be tested. Each support frame assembly 2 can withstand a maximum load of 20 tons without permanent deformation. The roller seat 31 uses double-row cylindrical roller bearings to fix the rollers 32 to minimize the frictional resistance at the support. The rollers 32 are made of hard wear-resistant steel to prevent deformation and interference caused by insufficient hardness after the workpiece comes into contact with the roller.

[0058] In this embodiment, as Figure 2As shown, the passive end flange of the first flexible diaphragm coupling 51 is fixedly connected to the end of the cathode roller 4 to be tested. The driving end flange of the first flexible diaphragm coupling 51 is connected to the input end flange of the torque limiter 52. The output end flange of the torque limiter 52 is fixedly connected to the input end flange of the torque sensor 53. The output end flange of the torque sensor 53 is fixedly connected to the passive end flange of the second flexible diaphragm coupling 54. The driving end flange of the second flexible diaphragm coupling 54 is fixedly connected to the output end of the reducer 55. The input end housing of the reducer 55 is connected to the front end cover of the servo motor 6 through an transition flange, and the output shaft of the servo motor 6 is fixedly connected to the input shaft hole of the reducer 55.

[0059] Specifically, when the above-mentioned flanges are fixedly connected, each flange is provided with an axial convex-concave stop interface. During the mating, the two flanges are first fitted together through the axial convex-concave stop interface to achieve absolute coaxiality. Then, high-strength bolts and anti-loosening washers are used for cascaded tightening to provide high-pressure preload to the mating end face.

[0060] In this embodiment, the processor 7 includes a central control unit, a data acquisition unit, a drive control unit, and a human-machine interaction unit, wherein:

[0061] The data acquisition unit is used to acquire real-time torque information from the torque sensor 53 and send it to the central control unit;

[0062] The servo motor 6 is equipped with an encoder, and the drive control unit is electrically connected to the encoder and the central control unit respectively.

[0063] The human-computer interaction unit is electrically connected to the central control unit.

[0064] Specifically, the central control unit uses a programmable logic controller (PLC) with a real-time operating system (RTOS) as its core. The signal output of the torque sensor 53 is electrically connected to the signal input of the data acquisition unit via a double-shielded cable. The data output of the data acquisition unit communicates with the central control unit via an internal high-speed bus or a backplane bus. The servo motor 6 integrates a 23-bit high-resolution absolute encoder at its tail, which is electrically connected to the encoder interface of the drive control unit via a feedback bus. The drive control unit and the central control unit establish bidirectional synchronous communication via a real-time industrial Ethernet bus. The human-machine interface unit uses an HMI touchscreen or an industrial computer, which is electrically connected to the central control unit via Ethernet (TCP / IP) for parameter configuration and command issuance.

[0065] This embodiment also provides a method for quantitatively detecting the static balance of a cathode roller, including the following steps:

[0066] The cathode roller 4 to be tested is supported on the roller assembly 3, the servo motor 6 is started, and the servo drive assembly 5 drives the cathode roller 4 to rotate at a constant speed.

[0067] The processor 7 acquires the real-time torque of the torque sensor 53 and the rotation angle of the output shaft of the servo motor 6 in real time.

[0068] Based on the real-time torque and rotation angle, the weight and placement position of the counterweight are obtained using sine function theory.

[0069] In this embodiment, before supporting the cathode roller 4 to be tested on the roller assembly 3, the flat base 1 is leveled, and the flatness is less than 0.1 mm. The symmetry error between the support frame assemblies 2 located on different tracks is less than 0.2 mm, the horizontality error is less than 0.1 mm, and the perpendicularity error between the support frame assembly 2 and the flat base 1 is less than 0.1 mm.

[0070] In this embodiment, the torque sensor 53 has a sampling frequency ≥1000Hz and an accuracy error ≤0.1%FS, in order to capture minute torque changes during rotation.

[0071] In this embodiment, the rotation angle signal is acquired using the angle encoder built into the servo motor 6. The total number of output pulses from the angle encoder in each cycle is read and converted into a rotation angle. The data acquisition unit converts the physical quantity captured by the torque sensor 53 into a digital signal to ensure sufficient data points are acquired during operation. The central control unit is the core of the logic operation and balancing algorithm, employing a PLC with a real-time operating system to ensure strict synchronization between the rotation angle data and real-time torque data. The human-machine interface unit is used for process guidance and data visualization, capable of drawing torque-angle waveforms in real time, intuitively reflecting the measurement status and interference level, and automatically outputting the counterweight position and length according to different product specifications. Specifically, a torque-angle waveform is constructed based on the real-time torque and rotation angle, and a torque-angle waveform relationship is constructed based on the torque-angle waveform, as follows: Figure 3 As shown, during the rotation of the workpiece, the effective lever arm of the biased position changes continuously. If the vertical direction is taken as the starting position, the torque change conforms to a sine function.

[0072] In this embodiment, the weight of the counterweight include:

[0073] ;

[0074] In the formula, It prioritizes torque; It is the acceleration due to gravity; The distance from the rotation center of the cathode roller 4 to be tested to the counterweight ring;

[0075] ;

[0076] In the formula, This represents the maximum real-time torque. This represents the minimum real-time torque.

[0077] In this embodiment, when the counterweight position is obtained based on the sine function theory, the processor 7 is configured to perform the following steps:

[0078] Based on the aforementioned sine function theory, the torque-angle waveform relationship is constructed as follows:

[0079] ;

[0080] In the formula, For real-time torque; It prioritizes torque; The real-time rotation angle of the cathode roller 4 to be tested; The eccentricity angle of the cathode roller 4 to be tested; The amplitude shift due to friction is a constant.

[0081] Based on the sum-to-product method, we obtain:

[0082] ;

[0083] make ;

[0084] but: Multiply both sides of the equation or The data points of the cathode roller 4 under test within one sampling period are summed to obtain:

[0085] ;

[0086] One sampling period refers to the time it takes for the cathode roller 4 to rotate 360°.

[0087] Within a sampling period, the following exists:

[0088] =0; =0; = ;

[0089] as well as, =0; = 0; = ;

[0090] get: , ;

[0091] but Since the arctangent function cannot resolve angles in the entire circumference, atan2, a quadrant arctangent function, is introduced to obtain... ;

[0092] Based on eccentricity angle , making the eccentric angle Then, the intersection with the counterweight ring is taken as the counterweight position.

[0093] like Figure 4 As shown in the figure, the dashed circle represents the counterweight ring configured at the factory for the cathode roller 4 under test. For a cathode roller with a fixed diameter, the radii of the counterweights are all equal. The dashed straight line represents the center of gravity line of the cathode roller 4 under test under the action of gravity. Point A is the rotation center of the cathode roller under test, M1 is the position of the counterweight, and line segment R is the distance between the configuration position M1 and the rotation center of the cathode roller 4 under test. Specifically, after calculating the eccentricity angle... Afterwards, its corresponding position is obtained as M0. M0 is only used as a marker and has no practical meaning. Rotate the centroid line around point A. The intersection with the counterweight ring is taken as the counterweight position M1.

[0094] The above are preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural modifications made based on the description and drawings of this invention, or direct / indirect applications in other related technical fields, are similarly included within the scope of patent protection of this invention.

Claims

1. A device for quantitatively detecting static balance of a cathode roller, characterized by, It includes a flat base (1) and a support frame assembly (2) spaced on the upper surface of the flat base (1). The top of the support frame assembly (2) is supported by a test cathode roller (4) via a roller assembly (3). One end of the test cathode roller (4) is connected to a servo motor (6) via a servo drive assembly (5). The servo motor (6) is connected to a processor (7). The servo drive assembly (5) includes a first flexible diaphragm coupling (51), a torque limiter (52), a torque sensor (53), a second flexible diaphragm coupling (54), and a reducer (55) that are connected in sequence and coaxially. The first flexible diaphragm coupling (51) is fixedly connected to the end of the cathode roller (4) to be tested, and the reducer (55) is connected to the servo motor (6) for transmission. The processor (7) is electrically connected to the torque sensor (53) and the servo motor (6).

2. The apparatus for quantitatively detecting static balance of a cathode roller according to claim 1, wherein The upper surface of the flat base (1) is provided with multiple parallel slide rails spaced apart, and the bottom surface of the support frame assembly (2) is provided with sliders adapted to the slide rails and locking components.

3. The apparatus for quantitatively detecting static balance of a cathode roller according to claim 1, wherein The support frame assembly (2) includes a base plate (21) and a top plate (22), and a column (23) disposed between the base plate (21) and the top plate (22). A wing plate (24) is also disposed between the base plate (21) and the column (23). The roller assembly (3) includes a roller seat (31) disposed on the upper surface of the top plate (22) and a roller (32) disposed on the roller seat (31) by a bearing.

4. The apparatus for quantitatively detecting static balance of a cathode roller according to claim 1, wherein The passive end flange of the first flexible diaphragm coupling (51) is fixedly connected to the end of the cathode roller (4) to be tested. The drive end flange of the first flexible diaphragm coupling (51) is connected to the input end flange of the torque limiter (52). The output end flange of the torque limiter (52) is fixedly connected to the input end flange of the torque sensor (53). The output end flange of the torque sensor (53) is fixedly connected to the passive end flange of the second flexible diaphragm coupling (54). The drive end flange of the second flexible diaphragm coupling (54) is fixedly connected to the output end of the reducer (55). The input end housing of the reducer (55) is connected to the front end cover of the servo motor (6) through an transition flange. The output shaft of the servo motor (6) is fixedly connected to the input shaft hole of the reducer (55).

5. The apparatus for quantitatively detecting static balance of a cathode roller according to claim 1, wherein The processor (7) includes a central control unit, a data acquisition unit, a drive control unit, and a human-machine interaction unit, wherein: The data acquisition unit is used to acquire real-time torque information from the torque sensor (53) and send it to the central control unit; The servo motor (6) is equipped with an encoder, and the drive control unit is electrically connected to the encoder and the central control unit respectively; The human-computer interaction unit is electrically connected to the central control unit.

6. A method of quantitatively detecting static balance of a cathode roll, characterized by, The apparatus for quantitatively detecting the static balance of a cathode roller according to any one of claims 1-5 includes the following steps: The cathode roller (4) to be tested is supported on the roller assembly (3), the servo motor (6) is started, and the cathode roller (4) to be tested is driven to rotate at a constant speed through the servo drive assembly (5); The real-time torque of the torque sensor (53) and the rotation angle of the output shaft of the servo motor (6) are obtained in real time by the processor (7). Based on the real-time torque and rotation angle, the weight and placement position of the counterweight are obtained using sine function theory.

7. The method for quantitatively detecting the static balance of the cathode roller according to claim 6, characterized in that, The counterweight weight Comprising: ； wherein is the biasing torque; is the acceleration of gravity; is the distance from the rotation center of the cathode roller (4) to the counterweight ring; ； In the formula, is the maximum value of the real-time torque; is the minimum value of the real-time torque.

8. The method for quantitatively detecting the static balance of the cathode roller according to claim 7, characterized in that, When the counterweight position is obtained based on the aforementioned sine function theory, the processor (7) is configured to perform the following steps: Based on the aforementioned sine function theory, the torque-angle waveform relationship is constructed as follows: ； In the formula, For real-time torque; It prioritizes torque; The real-time rotation angle of the cathode roller (4) to be tested; The eccentricity angle of the cathode roller (4) to be tested; The amplitude shift due to friction is a constant. Based on the sum-to-product method, we obtain: ； Let ; but: Multiply both sides of the equation or And sum all the data points of the cathode roller (4) under test within one sampling period to obtain: ； One sampling period refers to the rotation of the cathode roller (4) to be tested by 360°; Within a sampling period, the following exists: =0； =0； = ； as well as, =0; = 0; = ; get: , ; but Introducing the arctangent function atan2 in the four quadrants, we obtain ; Based on eccentricity angle , making the eccentric angle Then, the intersection with the counterweight ring is taken as the counterweight position.

9. The method for quantitatively detecting the static balance of the cathode roller according to claim 8, characterized in that, Based on the real-time torque and rotation angle, a torque-angle waveform diagram is constructed, and based on the torque-angle waveform diagram, a torque-angle waveform relationship is constructed.

10. The method for quantitatively detecting the static balance of the cathode roller according to claim 6, characterized in that, The torque sensor (53) has a sampling frequency of ≥1000Hz and a precision error of ≤0.1%FS.

Images