Rolling mill exit side oil retaining device integrated with roll detection function and oil retaining method

Abstract

This invention relates to the field of aluminum foil rolling technology, specifically disclosing a mill exit-side oil-blocking device and method integrating roll detection function. The device includes a support frame with two parallel sliding rods. Two sliding sleeves are slidably mounted on the sliding rods. The support frame also has a driving component for moving the sliding sleeves along the sliding rods. Each sliding sleeve has a mounting frame that can move horizontally along the vertical direction of the sliding rods. The mounting frame is hollow, and oil-blocking felt is provided on two inclined surfaces on the side of the mounting frame away from the sliding sleeves. This invention allows for online adjustment of the spacing between the oil-blocking felts on both sides according to the width of the rolled strip, eliminating the need for manual adjustment. It offers fast adjustment speed, high precision, and labor savings. Furthermore, it can detect the roundness and surface condition of the rolls during rolling and the parallelism of the upper and lower rolls during non-rolling periods. The device is simple to operate and convenient to use.

Description

Technical Field

[0001] This invention relates to the field of aluminum foil rolling technology, specifically to a mill exit-side oil blocking device and method that integrates roll detection function. Background Technology

[0002] In the aluminum foil rolling process, a large amount of process oil is typically sprayed at the mill inlet to ensure lubrication and cooling between the rolls and the strip. However, under high-speed rolling conditions, some of the process oil passes through the roll gap and is thrown at high speed towards the outlet side, eventually splashing onto the aluminum foil surface and forming oil stain defects. This type of surface contamination not only affects the product appearance but also significantly interferes with subsequent deep processing steps, reducing the reliability of the final product. Therefore, setting up an effective oil blocking and cleaning structure at the mill outlet side is crucial for ensuring the cleanliness of the aluminum foil surface.

[0003] Currently, most aluminum foil rolling mills employ static mechanical oil-blocking designs on the outlet side. For example, patent CN205008386U proposes an oil-blocking device for aluminum foil rolling mills, using a fixedly installed splash guard to prevent oil droplets from splashing or dripping. However, in this design, the position of the splash guard is fixed and cannot be flexibly adjusted according to different strip widths. Each time product specifications are changed, the machine must be stopped for manual adjustment, severely impacting continuous production efficiency. Another patent, CN203900202U, introduces an oil removal device for finishing mills, which also uses a fixed combination of oil-blocking felt and bearing bushes to prevent rolling oil from splashing onto the foil surface, but it also lacks the ability to adapt to different strip sizes.

[0004] Furthermore, during the aluminum foil rolling process, the parallelism and roundness of the rolls are the core factors determining the dimensional accuracy and surface quality of the product. If there is a parallelism deviation between the upper and lower rolls, it can easily cause uneven thickness on both sides of the aluminum foil; while roll roundness errors or surface damage will form corresponding defects on the aluminum foil surface, seriously affecting the grade of the finished product.

[0005] In summary, existing oil-blocking structures generally employ fixed installation methods, limiting their function to merely physically blocking oil and failing to provide real-time monitoring of critical geometric parameters of the rolls. Furthermore, current detection of roll parallelism and roundness still relies on complex external specialized equipment, which must be operated by professionals while the machine is stopped, making continuous online monitoring and timely early warning impossible. Therefore, this invention proposes an oil-blocking device and method on the mill exit side that integrates roll detection functions to address the aforementioned technical bottlenecks. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the defects of the existing technology and provide a mill exit side oil blocking device and oil blocking method with integrated roll detection function. The spacing of the oil blocking felts on both sides can be adjusted online according to the width of the rolled strip, without the need for manual adjustment. The adjustment speed is fast and the accuracy is high, saving manpower. It can also detect the roundness and surface condition of the rolls during the rolling process, and can detect the parallelism of the upper and lower rolls during non-rolling periods. It is simple to operate and easy to use, and can effectively solve the problems in the background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a mill exit-side oil baffle device integrating roll detection function, comprising a bracket, two parallel sliding rods on the bracket, two sliding sleeves slidably mounted on the sliding rods, and a driving component on the bracket for driving the sliding sleeves to move along the sliding rods. A mounting bracket capable of horizontally moving along the vertical direction of the sliding rods is provided on the side of each sliding sleeve. The mounting bracket is a hollow structure, and oil-blocking felt is provided on two inclined surfaces of the mounting bracket away from the sliding sleeves. An external threaded cylinder is installed inside the mounting bracket. An elastic column capable of sliding along its axial direction is provided inside the external threaded cylinder. A pressure sensor is provided at one end of the elastic column inside the external threaded cylinder, and a ball is provided at the telescopic end of the elastic column.

[0008] As a preferred embodiment of the present invention, the driving component includes a servo motor mounted on the side of the bracket, the output shaft of the servo motor is mounted with a lead screw via a coupling, the sleeve is provided at the part of the sliding sleeve corresponding to the lead screw, the open end of the sleeve is provided with a nut, and the nut is threadedly connected to the lead screw.

[0009] As a preferred embodiment of the present invention, a screw hole is provided in the middle of the side of the sliding sleeve, and an adjusting screw is threadedly connected inside the screw hole. The end of the adjusting screw is rotatably connected to the mounting bracket.

[0010] As a preferred embodiment of the present invention, the mounting bracket is provided with a guide post on the side corresponding to the sliding sleeve, and the guide post horizontally moves through the sliding sleeve.

[0011] As a preferred embodiment of the present invention, the mounting bracket has a threaded groove at the part corresponding to the external threaded cylinder, and the external threaded cylinder is threadedly connected in the threaded groove.

[0012] As a preferred embodiment of the present invention, both the oil-blocking felt and the mounting frame are provided with through holes, so that the elastic column pushes the rolling ball through the through hole to contact the roller.

[0013] As a preferred embodiment of the present invention, the width of the oil-blocking felt is not less than 20cm, and the upper and lower oil-blocking felts are connected between the rollers.

[0014] An oil-blocking method for an oil-blocking device integrated with roll detection function on the exit side of a rolling mill involves installing a bracket on the exit side of the rolling mill and ensuring that the sliding rod is parallel to the roll axis. Before rolling, the oil-blocking felt is adjusted as follows: First, the adjusting screw is rotated, which drives the mounting frame to move along the guide column, thereby causing the mounting frame to bring the oil-blocking felt into contact with and squeeze the roll. Under the force of the roll, the part of the mounting frame that holds the oil-blocking felt deforms, making the oil-blocking felt fit against the roll. Then, a servo motor is controlled to work, and the servo motor drives the lead screw to rotate through the coupling. During the rotation of the lead screw, the nut drives the sliding sleeve to move along the sliding rod through the sleeve. The sliding sleeve drives the mounting frame and the oil-blocking felt to move through the guide column and the adjusting screw, and controls the oil-blocking felt to maintain a safe distance from the strip, thus completing the adjustment of the oil-blocking felt. During the rolling process, the oil-blocking felt blocks and absorbs the process oil sprayed from the roll gap until the rolling is completed.

[0015] As a preferred technical solution of the present invention, after the oil-blocking felt is adjusted, the external threaded cylinder is rotated. During the rotation of the external threaded cylinder, the elastic column is moved, thereby causing the elastic column to push the ball to contact the surface of the roll and generate positive pressure. During the rolling process, the ball is always in contact with the surface of the roll. The radial force of the roll is captured by the pressure sensor through the elastic column. The pressure sensor continuously collects the pressure data generated therefrom and transmits it to the control system in real time. Once the system detects that the sensor reading has changed abruptly beyond the preset threshold, it will determine that there is a surface defect at the corresponding position of the roll.

[0016] As a preferred technical solution of the present invention, after rolling, the parallelism of the upper and lower rolls is detected. The steps are as follows: the servo motor is controlled to work, and the servo motor drives the lead screw to rotate through the coupling. During the rotation of the lead screw, the nut drives the sliding sleeve to move along the sliding rod through the sleeve. The sliding sleeve drives the mounting frame and the oil-blocking felt to move through the guide column and the adjusting screw. The mounting frame drives the external threaded cylinder, the elastic column and the ball to move synchronously along the axial direction of the roll. During this process, the loads applied to the elastic columns of the upper and lower rolls are synchronously collected by the corresponding pressure sensors, thereby obtaining a pressure dataset distributed along the axial direction of the roll body. By analyzing the pressure curves of the upper and lower rolls obtained on the same mounting frame, their parallelism can be evaluated: if the two curves change synchronously and the pressure difference is constant, the parallelism is qualified; otherwise, if the difference shows regular or abrupt fluctuations, it indicates that there is a parallelism deviation.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The oil-blocking device and method for the mill exit side with integrated roll detection function of the present invention achieves high-precision adjustment of the oil-blocking felt by driving the mounting frame with a servo motor and a lead screw. This avoids the problem of low work efficiency caused by the need for disassembly and reassembly in the traditional method, which can greatly improve work efficiency and save manpower and time.

[0019] 2. The oil blocking device and method for the mill exit side with integrated roll detection function of the present invention can collect the pressure applied to it by the roll through the pressure sensor during the rolling process, thereby monitoring the roundness and surface condition of the roll, which facilitates timely detection of roll abnormalities and helps to improve product quality.

[0020] 3. The oil blocking device and method for the mill exit side with integrated roll detection function in the example of the present invention uses an elastic column, a ball and a pressure sensor to form a detector. The detector can be moved indirectly along the slide bar to monitor the parallelism of the upper and lower rolls. Monitoring can be carried out when the machine is stopped, without disassembling the rolls or using special detection instruments, which can greatly save detection costs. The operation is simple, fast and convenient.

[0021] 4. The oil blocking device and method for the mill exit side with integrated roll detection function of the present invention can adjust the spacing of the oil blocking felts on both sides online according to the width of the rolled strip, without the need for manual adjustment. The adjustment speed is fast and the accuracy is high, saving manpower. It can also detect the roundness and surface condition of the rolls during the rolling process, and can detect the parallelism of the upper and lower rolls during non-rolling periods. It is simple to operate and convenient to use. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a partial structural diagram of the present invention;

[0024] Figure 3 for Figure 2 A schematic diagram of the right-side view structure;

[0025] Figure 4 This is a cross-sectional view of the externally threaded cylinder in this invention.

[0026] Figure 5 This is a schematic diagram of the structure when the present invention is in use;

[0027] Figure 6 for Figure 5 Side view.

[0028] In the diagram: 1 bracket, 2 slide rod, 21 sliding sleeve, 3 sleeve, 31 nut, 4 servo motor, 41 lead screw, 5 mounting bracket, 51 adjusting screw, 52 guide post, 53 oil-blocking felt, 6 external threaded cylinder, 61 pressure sensor, 7 elastic column, 71 ball. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figure 1-6 This invention provides a technical solution: a mill exit-side oil baffle device integrating roll detection function, comprising a bracket 1, the bracket 1 being installed on the mill exit side, the bracket 1 having two parallel sliding rods 2, two sliding sleeves 21 slidably mounted on the sliding rods 2, and the bracket 1 having a driving component for moving the sliding sleeves 21 along the sliding rods 2, the side of the sliding sleeves 21 having a mounting frame 5 capable of horizontally moving along the vertical direction of the sliding rods 2, the mounting frame 5 having a hollow structure, and oil-blocking felt 53 being provided on two inclined surfaces on the side of the mounting frame 5 away from the sliding sleeves 21, the two inclined surfaces being made of metal sheets to allow for deformation, moving the mounting frame 5, so that oil-blocking felts are mounted on the mounting frame 5. After one side of the oil-blocking felt 53 contacts the roll and generates pressure, the mounting frame 5 can undergo elastic deformation, thereby causing the oil-blocking felt 53 to adhere to the roll. An external threaded cylinder 6 is installed inside the mounting frame 5. An elastic column 7 that can slide along its axial direction is provided inside the external threaded cylinder 6. A pressure sensor 61 is provided at one end of the elastic column 7 inside the external threaded cylinder 6, and a ball 71 is provided at the telescopic end of the elastic column 7. Rotating the external threaded cylinder 6 can adjust the position of the elastic column 7 and the ball 71, thereby ensuring that after the ball 71 contacts the roll, the roll applies a certain positive pressure to the pressure sensor 61 through the ball 71 and the elastic column 7, which facilitates subsequent detection of the roll.

[0031] During the rolling process, the pressure sensor 61 can collect the pressure applied to the roll, thereby monitoring the roundness and surface condition of the roll, facilitating the timely detection of roll abnormalities and helping to improve product quality.

[0032] The elastic column 7, the ball 71, and the pressure sensor 61 constitute the detector. The detector can be moved indirectly along the slide bar 2 to monitor the parallelism of the upper and lower rolls. Monitoring can be performed as soon as the machine stops, without disassembling the rolls or using special testing instruments, which can greatly save testing costs. The operation is simple, quick, and convenient.

[0033] There are two slide bars 2. During rolling, the aluminum foil strip passes between the two slide bars 2.

[0034] Furthermore, the driving component includes a servo motor 4 mounted on the side of the bracket 1. The output shaft of the servo motor 4 is equipped with a lead screw 41 via a coupling. A sleeve 3 is provided at the corresponding part of the sliding sleeve 21 and the lead screw 41. A nut 31 is provided at the open end of the sleeve 3, and the nut 31 is threadedly connected to the lead screw 41. The servo motor 4 drives the lead screw 41 to rotate. During the rotation of the lead screw 41, the nut 31 drives the sliding sleeve 21 to move along the sliding rod 2 through the sleeve 3. The mounting bracket 5 is driven by the servo motor 4 and the lead screw 41, thereby achieving high-precision adjustment of the oil-blocking felt 53. This avoids the problem of low work efficiency caused by disassembly and reinstallation in the traditional method, which can greatly improve work efficiency and save manpower and time.

[0035] When inspecting the parallelism or surface defects of the entire roll, the nut 31 can be disengaged from the lead screw 41, and the sliding sleeve 21 can be manually pushed to move along the slide rod 2. At this time, the sliding sleeve 21 can move the part of the slide rod 2 located between the two lead screws 41, which facilitates the inspection of the roundness and surface defects of the entire roll through subsequent inspection steps.

[0036] Furthermore, a screw hole is provided in the middle of the side of the sliding sleeve 21, and an adjusting screw 51 is threaded inside the screw hole. The end of the adjusting screw 51 is rotatably connected to the mounting frame 5. By rotating the adjusting screw 51, the position of the mounting frame 5 can be moved so that the mounting frame 5 can fit with rolls of different diameters.

[0037] Furthermore, the mounting bracket 5 is provided with a guide post 52 on the side corresponding to the sliding sleeve 21. The guide post 52 moves horizontally through the sliding sleeve 21 and can support and guide the mounting bracket 5.

[0038] Furthermore, the mounting bracket 5 has a threaded groove at the corresponding part of the external threaded cylinder 6, and the external threaded cylinder 6 is threadedly connected in the threaded groove.

[0039] Furthermore, both the oil-blocking felt 53 and the mounting frame 5 are provided with through holes, so that the elastic column 7 pushes the ball 71 through the through holes to contact the roll. The oil-blocking felt 53 can absorb and wipe the process oil on the roll, so as to avoid the oil film on the roll from affecting the detection carried out by the ball 71.

[0040] Furthermore, the width of the oil-blocking felt 53 is not less than 20cm, and the upper and lower oil-blocking felts 53 are connected in the part inserted between the rolls, so that the oil-blocking felt 53 can prevent the process oil on the inlet side from splashing onto the strip on the outlet side through the gap of the rolls, and at the same time can wipe and block the process oil adsorbed on the rolls.

[0041] An oil-blocking method for an oil-blocking device on the exit side of a rolling mill with integrated roll detection function involves installing a bracket 1 on the exit side of the rolling mill and ensuring that the slide bar 2 is parallel to the roll axis. Before rolling, the oil-blocking felt 53 is adjusted as follows: first, the adjusting screw 51 is rotated, and the adjusting screw 51 drives the mounting frame 5 to move along the direction of the guide column 52, so that the mounting frame 5 drives the oil-blocking felt 53 to contact and squeeze the roll. Under the force of the roll, the part of the mounting frame 5 that holds the oil-blocking felt 53 deforms, and the oil-blocking felt 53 fits into the roll. Next, the servo motor 4 is controlled to work. The servo motor 4 drives the lead screw 41 to rotate through the coupling. During the rotation of the lead screw 41, the nut 31 drives the sliding sleeve 21 to move along the sliding rod 2 through the sleeve 3. The sliding sleeve 21 drives the mounting frame 5 and the oil-blocking felt 53 to move through the guide column 52 and the adjusting screw 51, and controls the oil-blocking felt 53 to maintain a safe distance from the strip, thereby completing the adjustment of the oil-blocking felt 53. During the rolling process, the oil-blocking felt 53 blocks and absorbs the process oil sprayed from the gap of the rolls until the rolling is completed.

[0042] Furthermore, after adjusting the oil-blocking felt 53, the external threaded cylinder 6 is rotated. During the rotation of the external threaded cylinder 6, the elastic column 7 is moved, thereby causing the elastic column 7 to push the ball 71 to contact the surface of the roll and generate positive pressure. During the rolling process, the ball 71 is always in contact with the surface of the roll. The radial force of the roll is captured by the pressure sensor 61 through the elastic column 7. The pressure sensor 61 continuously collects the pressure data generated and transmits it to the control system in real time. Once the system detects a sudden change in the sensor reading that exceeds the preset threshold, it will determine that there is a surface defect at the corresponding position of the roll.

[0043] Further, after rolling is completed, the parallelism of the upper and lower rolls is checked. The steps are as follows: The servo motor 4 is controlled to work. The servo motor 4 drives the lead screw 41 to rotate through the coupling. During the rotation of the lead screw 41, the nut 31 drives the sliding sleeve 21 to move along the sliding rod 2 through the sleeve 3. The sliding sleeve 21 drives the mounting frame 5 and the oil-blocking felt 53 to move through the guide column 52 and the adjusting screw 51. The mounting frame 5 drives the external threaded cylinder 6, the elastic column 7 and the ball 71 to move synchronously along the axial direction of the roll. During this process, the loads applied to the elastic columns 7 by the upper and lower rolls are synchronously collected by the corresponding pressure sensors 61, thereby obtaining a pressure dataset distributed along the axial direction of the roll body. By analyzing the pressure curves of the upper and lower rolls obtained on the same mounting frame 5, their parallelism can be evaluated: if the two curves change synchronously and the pressure difference is constant, the parallelism is qualified; otherwise, if the difference shows regular or abrupt fluctuations, it indicates that there is a parallelism deviation.

[0044] This invention allows for online adjustment of the spacing between the two sides of the oil-blocking felt 53 according to the width of the rolled strip, eliminating the need for manual adjustment. It offers fast adjustment speed, high precision, and saves manpower. Furthermore, it can detect the roundness and surface condition of the rolls during the rolling process and the parallelism of the upper and lower rolls during non-rolling periods. The operation is simple and convenient.

[0045] All parts not disclosed in this invention are prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mill exit-side oil baffle device integrating roll detection function, comprising a bracket (1), characterized in that: The bracket (1) is provided with two parallel sliding rods (2), and two sliding sleeves (21) are slidably arranged on the sliding rods (2). The bracket (1) is provided with a driving component that drives the sliding sleeves (21) to move along the sliding rods (2). The side of the sliding sleeves (21) is provided with a mounting bracket (5) that can move horizontally along the vertical direction of the sliding rods (2). The mounting bracket (5) is a hollow structure, and oil-blocking felts (53) are provided on two inclined surfaces of the mounting bracket (5) away from the sliding sleeves (21). An external threaded cylinder (6) is installed inside the mounting bracket (5). An elastic column (7) that can slide along its axial direction is provided inside the external threaded cylinder (6). A pressure sensor (61) is provided at one end of the elastic column (7) inside the external threaded cylinder (6), and a ball (71) is provided at the telescopic end of the elastic column (7).

2. The mill exit-side oil baffle device with integrated roll detection function according to claim 1, characterized in that: The driving component includes a servo motor (4) mounted on the side of the bracket (1). The output shaft of the servo motor (4) is equipped with a lead screw (41) via a coupling. The sleeve (21) is provided with a sleeve (3) at the part corresponding to the lead screw (41). The open end of the sleeve (3) is provided with a nut (31), and the nut (31) is threadedly connected to the lead screw (41).

3. The mill exit-side oil baffle device with integrated roll detection function according to claim 2, characterized in that: The sliding sleeve (21) has a screw hole in the middle of its side, and an adjusting screw (51) is threaded inside the screw hole. The end of the adjusting screw (51) is rotatably connected to the mounting bracket (5).

4. The mill exit-side oil baffle device with integrated roll detection function according to claim 3, characterized in that: The mounting bracket (5) is provided with a guide post (52) on the side corresponding to the sliding sleeve (21), and the guide post (52) moves horizontally through the sliding sleeve (21).

5. The mill exit-side oil baffle device with integrated roll detection function according to claim 4, characterized in that: The mounting bracket (5) has a threaded groove at the corresponding part of the external threaded cylinder (6), and the external threaded cylinder (6) is threadedly connected in the threaded groove.

6. The mill exit-side oil baffle device with integrated roll detection function according to claim 5, characterized in that: Both the oil-blocking felt (53) and the mounting bracket (5) have through holes, so that the elastic column (7) pushes the ball (71) through the through hole to contact the roller.

7. The mill exit side oil baffle device with integrated roll detection function according to claim 6, wherein the width of the oil baffle felt (53) is not less than 20cm, and the upper and lower oil baffle felts (53) are connected in the part inserted between the rolls.

8. A method for blocking oil on the mill exit side based on the integrated roll detection function of claim 7, characterized in that: Install the bracket (1) on the mill exit side and ensure that the slide bar (2) is parallel to the roll axis; before rolling, adjust the oil-blocking felt (53) as follows: first, rotate the adjusting screw (51), the adjusting screw (51) drives the mounting frame (5) to move along the guide column (52), so that the mounting frame (5) drives the oil-blocking felt (53) to contact and squeeze the roll. Under the action of the roll, the part of the mounting frame (5) that holds the oil-blocking felt (53) deforms and makes the oil-blocking felt (53) fit against the roll; then control the servo motor (4) to work, the servo motor The machine (4) drives the lead screw (41) to rotate through the coupling. During the rotation of the lead screw (41), the nut (31) drives the sliding sleeve (21) to move along the sliding rod (2) through the sleeve (3). The sliding sleeve (21) drives the mounting frame (5) and the oil-blocking felt (53) to move through the guide column (52) and the adjusting screw (51), and controls the oil-blocking felt (53) to maintain a safe distance from the strip, thereby completing the adjustment of the oil-blocking felt (53). During the rolling process, the oil-blocking felt (53) blocks and absorbs the process oil sprayed from the gap of the rolls until the rolling is completed.

9. The oil-blocking method of the mill exit-side oil-blocking device with integrated roll detection function according to claim 8, characterized in that: After the oil-blocking felt (53) is adjusted, the external threaded cylinder (6) is rotated. During the rotation of the external threaded cylinder (6), the elastic column (7) is moved, thereby causing the elastic column (7) to push the ball (71) to contact the surface of the roll and generate positive pressure. During the rolling process, the ball (71) is always in contact with the surface of the roll. The radial force of the roll is captured by the pressure sensor (61) through the elastic column (7). The pressure sensor (61) continuously collects the pressure data generated therefrom and transmits it to the control system in real time. Once the system detects that the sensor reading has changed abruptly beyond the preset threshold, it will determine that there is a surface defect at the corresponding position of the roll.

10. The oil-blocking method of the mill exit-side oil-blocking device with integrated roll detection function according to claim 9, characterized in that: After rolling is completed, the parallelism of the upper and lower rolls is checked. The steps are as follows: control the servo motor (4) to work. The servo motor (4) drives the lead screw (41) to rotate through the coupling. During the rotation of the lead screw (41), the nut (31) drives the sliding sleeve (21) to move along the sliding rod (2) through the sleeve (3). The sliding sleeve (21) drives the mounting frame (5) and the oil-blocking felt (53) to move through the guide column (52) and the adjusting screw (51). The mounting frame (5) drives the external threaded cylinder (6) and the elastic column (7). The upper and lower rolls move synchronously along the axial direction of the rolls and the ball (71). During this process, the loads applied to their respective elastic columns (7) by the upper and lower rolls are synchronously collected by the corresponding pressure sensors (61), thereby obtaining a pressure dataset distributed along the axial direction of the roll body. By analyzing the pressure curves of the upper and lower rolls obtained on the same mounting frame (5), their parallelism can be evaluated: if the two curves change synchronously and the pressure difference is constant, then the parallelism is qualified; otherwise, if the difference shows regular or sudden fluctuations, it indicates that there is a parallelism deviation.

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