Rolling mill outlet side oil blocking device integrated with roller detection function and oil blocking method

Abstract

The invention relates to the technical field of aluminum foil rolling, and particularly discloses a rolling mill outlet side oil blocking device integrated with a roller detection function and an oil blocking method.The rolling mill outlet side oil blocking device comprises a support, two parallel sliding rods are arranged on the support, two sliding sleeves are arranged on the sliding rods in a sliding mode, and driving parts for driving the sliding sleeves to move along the sliding rods are arranged on the support; a mounting frame capable of horizontally moving in the vertical direction of the sliding rod is arranged on the side face of the sliding sleeve, the mounting frame is of a hollow structure, and oil blocking felts are arranged on the two slopes of the side, away from the sliding sleeve, of the mounting frame. The distance between the oil blocking felts on the two sides can be adjusted on line according to the width of the strip to be rolled, manual adjustment is not needed, the adjusting speed is high, precision is high, manpower is saved, the roundness and the surface state of the rollers can be detected in the rolling process, the parallelism of the upper roller and the lower roller can be detected in the non-rolling period, and the production efficiency is improved. Operation is simple, and use is convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aluminum foil rolling, in particular to a rolling mill outlet side oil blocking device integrated with roller detection function and an oil blocking method. BACKGROUND

[0002] In the aluminum foil rolling process, in order to ensure the lubrication and cooling between the roller and the strip, a large amount of process oil is usually sprayed on the inlet side of the rolling mill. However, under high-speed rolling conditions, part of the process oil will be thrown to the outlet side through the gap between the rollers at high speed, and finally splash on the surface of the aluminum foil, forming oil stain defects. Such surface contamination not only affects the appearance of the product, but also significantly interferes with the subsequent deep processing process, reducing the quality reliability of the final product. Therefore, it is crucial to set effective oil blocking and cleaning structures on the outlet side of the rolling mill to ensure the cleanliness of the aluminum foil surface.

[0003] Currently, the outlet side of the aluminum foil rolling mill mostly adopts a static mechanical oil blocking design. For example, patent CN205008386U proposes an aluminum foil rolling mill oil blocking device, which uses a fixedly installed splash-proof plate to block oil droplets from splashing or dripping. However, the oil blocking plate in this scheme is fixed in position and cannot be adjusted flexibly for different strip widths. Each time the product specification is changed, manual adjustment is required during shutdown, which seriously affects the continuous production efficiency. Another patent CN203900202U introduces an oil removal device applied to a finishing mill, which also uses a combination of fixed oil blocking felt and bushing to prevent rolling oil from splashing onto the foil surface, but does not have the ability to adjust to different strip sizes.

[0004] In addition, during the aluminum foil rolling process, the parallelism and roundness of the rollers are the key factors that determine the product size precision and surface quality. If there is a parallelism deviation between the upper and lower rollers, it is easy to cause uneven thickness on both sides of the aluminum foil. While the roundness error or surface damage of the roller will form corresponding defects on the surface of the aluminum foil, seriously affecting the product grade.

[0005] In summary, the existing oil blocking structure generally adopts a fixed installation method, and the function is limited to physical oil blocking, which cannot monitor the key geometric parameters of the roller in real time. Moreover, the detection of roller parallelism and roundness still relies on complex external special equipment, and must be operated by professional personnel in the shutdown state, which cannot realize online continuous monitoring and timely warning. Therefore, the present application proposes a rolling mill outlet side oil blocking device integrated with roller detection function and an oil blocking method to address the above technical bottlenecks. SUMMARY

[0006] The technical problem solved by the present application is to overcome the existing defects, provide a rolling mill outlet side oil blocking device integrated with roller detection function and an oil blocking method, which can adjust the distance between the two side oil blocking felt according to the width of the strip being rolled, without manual adjustment, with fast adjustment speed, high precision, saving manpower, and can detect the roller roundness and surface state during rolling, and can detect the parallelism of the upper and lower rollers during non-rolling, simple operation, convenient to use, and can effectively solve the problems in the background art.

[0007] To achieve the above object, the present application provides the following technical scheme: a rolling mill outlet side oil blocking device integrated with roller detection function, comprising a support, two parallel sliding rods are arranged on the support, two sliding sleeves are slidably arranged on the sliding rods, and a driving member is arranged on the support to drive the sliding sleeves to move along the sliding rods, the side surface of the sliding sleeve is provided with a mounting bracket capable of moving horizontally along the vertical direction of the sliding rod, the mounting bracket is a hollow structure, and the two inclined surfaces away from the sliding sleeve on the mounting bracket are each provided with an oil blocking felt, an external thread cylinder is installed in the mounting bracket, an elastic column capable of sliding along the axial direction of the external thread cylinder is arranged in the internal part of the external thread cylinder, and a pressure sensor is arranged at one end of the elastic column in the internal part of the external thread cylinder, and a rolling ball is arranged at the telescopic end of the elastic column.

[0008] As a preferred technical scheme of the present application, the driving member comprises a servo motor installed on the side surface of the support, the output shaft of the servo motor is installed with a lead screw through a shaft coupling, the part corresponding to the lead screw of the sliding sleeve is provided with a sleeve, and the opening end of the sleeve is provided with a nut, and the nut is threadedly connected with the lead screw.

[0009] As a preferred technical scheme of the present application, a screw hole is formed in the middle part of the side surface of the sliding sleeve, and an adjusting screw is threadedly connected in the screw hole, and the end of the adjusting screw is rotatably connected with the mounting bracket.

[0010] As a preferred technical scheme of the present application, a guide column is arranged on the side surface corresponding to the sliding sleeve, and the guide column is horizontally movably penetrated through the sliding sleeve.

[0011] As a preferred technical scheme of the present application, a threaded groove is formed in the part corresponding to the mounting bracket and the external thread cylinder, and the external thread cylinder is threadedly connected in the threaded groove.

[0012] As a preferred technical scheme of the present application, a through hole is formed in the oil blocking felt and the mounting bracket, so that the elastic column pushes the rolling ball to pass through the through hole and contact the roller.

[0013] As a preferred technical scheme of the present application, the width of the oil blocking felt is not less than 20 cm, and the two oil blocking felts inserted between the rollers are connected.

[0014] The application discloses a method for blocking oil of a mill exit side oil blocking device integrated with a roller detection function, a support is installed at the mill exit side and the slide bar is parallel to the roller axis; before rolling, the oil blocking felt is adjusted as follows: first, the adjusting screw is rotated, the adjusting screw drives the mounting frame to move along the guide column direction, so that the mounting frame drives the oil blocking felt to contact and press the roller, under the action force of the roller, the mounting frame is deformed, and the oil blocking felt is attached to the roller; then, the servo motor is controlled to work, the servo motor drives the lead screw to rotate through the coupling, the nut drives the sliding sleeve to move along the slide bar in the rotating process of the lead screw, the sliding sleeve drives the mounting frame and the oil blocking felt to move through the guide column and the adjusting screw, and the oil blocking felt and the strip are kept at a safe distance, so that the adjustment of the oil blocking felt is completed; in the rolling process, the oil blocking felt blocks and adsorbs the process oil sprayed from the roller gap until the rolling is completed.

[0015] As a preferred technical scheme of the application, after the adjustment of the oil blocking felt is completed, the external threaded cylinder is rotated, the elastic column is driven to move in the rotating process of the external threaded cylinder, so that the elastic column drives the rolling ball to contact the surface of the roller and generate a positive pressure; in the rolling process, the rolling ball is always in abutment with the surface of the roller, the radial force of the roller is captured by the pressure sensor, the pressure sensor continuously collects the pressure data generated thereby and transmits the pressure data to the control system in real time, and once the system identifies that the sensor reading suddenly exceeds the preset threshold value, it is determined that there is a surface defect at the corresponding position of the roller.

[0016] As a preferred technical scheme of the application, after the rolling is completed, the parallelism of the upper roller and the lower roller is detected, and the steps are as follows: the servo motor is controlled to work, the servo motor drives the lead screw to rotate through the coupling, the nut drives the sliding sleeve to move along the slide bar in the rotating process of the lead screw, the sliding sleeve drives the mounting frame and the oil blocking felt to move through the guide column and the adjusting screw, and the mounting frame drives the external threaded cylinder, the elastic column and the rolling ball to move synchronously along the axial direction of the roller; in this process, the load applied to each elastic column of the upper roller and the lower roller is synchronously collected by the corresponding pressure sensor, so that a pressure data set distributed along the axial direction of the roller body is obtained; the parallelism of the upper roller and the lower roller can be evaluated by analyzing the pressure curves of the upper roller and the lower roller obtained on the same mounting frame: if the change trends of the two curves are synchronous and the pressure difference is constant, the parallelism is qualified; otherwise, if the difference value presents regular or sudden fluctuation, it indicates that there is a parallelism deviation.

[0017] Compared with the prior art, the application has the following beneficial effects: 1、The mill exit side oil blocking device integrated with a roller detection function and the oil blocking method provided by the application drive the mounting frame through the servo motor and the lead screw, so that the high-precision adjustment of the oil blocking felt is realized, the problem of low work efficiency caused by the need for reassembly in the traditional way is avoided, the work efficiency can be greatly improved, and manpower and time can be saved.

[0018] 2、The mill exit side oil blocking device and the oil blocking method integrating the roller detection function of the application can collect the pressure applied to the roller by the pressure sensor during the rolling process, thereby monitoring the roundness and surface state of the roller, facilitating the timely discovery of the abnormality of the roller, and helping to improve the product quality.

[0019] 3、The mill exit side oil blocking device and the oil blocking method integrating the roller detection function of the application, the elastic column, the ball and the pressure sensor constitute the detector, the detector can be indirectly moved along the slide rod, thereby monitoring the parallelism of the upper roller and the lower roller, the monitoring can be performed when the machine is stopped, the roller does not need to be disassembled, and special detection instruments do not need to be introduced, so that the detection cost can be greatly saved, and the operation is simple, fast and convenient.

[0020] 4、The mill exit side oil blocking device and the oil blocking method integrating the roller detection function of the application can adjust the distance between the two side oil blocking felt according to the width of the strip being rolled, without manual adjustment, the adjustment speed is fast and the precision is high, manpower is saved, the roundness and surface state of the roller can be detected during the rolling process, and the parallelism of the upper roller and the lower roller can be detected during the non-rolling period, the operation is simple and convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic view of the application; Figure 2 is a partial structural schematic view of the application; Figure 3 is a right view structural schematic view of the application; Figure 2 Figure 4 is a sectional view structural schematic view of the outer threaded cylinder in the application; Figure 5 is a structural schematic view of the application in use; Figure 6 is a side view of the application. Figure 5

[0022] In the figure: 1 support, 2 slide rod, 21 slide sleeve, 3 sleeve, 31 nut, 4 servo motor, 41 lead screw, 5 mounting frame, 51 adjusting screw, 52 guide column, 53 oil blocking felt, 6 outer threaded cylinder, 61 pressure sensor, 7 elastic column, 71 ball. DETAILED DESCRIPTION

[0023] ​​With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0024] Please refer to Figures 1-6 The present application provides a technical solution: a rolling mill outlet side oil blocking device integrated with a rolling detection function, comprising a support 1 installed at the outlet side of the rolling mill, two parallel sliding rods 2 arranged on the support 1, two sliding sleeves 21 slidingly arranged on the sliding rods 2, and a driving member arranged on the support 1 to drive the sliding sleeves 21 to move along the sliding rods 2. The side surface of the sliding sleeve 21 is provided with a mounting bracket 5 capable of moving horizontally along the vertical direction of the sliding rod 2. The mounting bracket 5 is a hollow structure, and the two inclined surfaces on the side of the mounting bracket 5 away from the sliding sleeve 21 are each provided with an oil blocking felt 53. The two inclined surfaces are made of metal sheets, so that they can be deformed. After moving the mounting bracket 5 and making the side of the mounting bracket 5 on which the oil blocking felt 53 is installed contact the rolling mill and generate pressure, the mounting bracket 5 can be elastically deformed, so that the oil blocking felt 53 is attached to the rolling mill. An external thread cylinder 6 is installed in the mounting bracket 5. The internal thread cylinder 6 is provided with an elastic column 7 capable of sliding along the axial direction thereof. The end of the elastic column 7 located in the internal thread cylinder 6 is provided with a pressure sensor 61. The telescopic end of the elastic column 7 is provided with a rolling ball 71. Rotating the external thread cylinder 6 can adjust the positions of the elastic column 7 and the rolling ball 71, so that after the rolling ball 71 contacts the rolling mill, the rolling mill applies a certain positive pressure to the pressure sensor 61 through the rolling ball 71 and the elastic column 7, which facilitates subsequent detection of the rolling mill.

[0025] During the rolling process, the pressure sensor 61 can collect the pressure applied by the rolling mill, so as to monitor the roundness and surface state of the rolling mill, facilitate timely detection of the abnormality of the rolling mill, and help improve the product quality.

[0026] The elastic column 7, the rolling ball 71, and the pressure sensor 61 constitute a detector. The detector can be indirectly moved along the sliding rod 2, so as to monitor the parallelism of the upper rolling mill and the lower rolling mill. The monitoring can be performed when the rolling mill is stopped, without the need to disassemble the rolling mill or introduce special detection instruments, which can greatly save the detection cost and is simple, fast, and convenient to operate.

[0027] There are two sliding rods 2. The aluminum foil strip passes between the two sliding rods 2 during rolling.

[0028] Further, the driving member comprises a servo motor 4 installed on the side of the support 1, the output shaft of the servo motor 4 is provided with a lead screw 41 through a shaft coupling, the sliding sleeve 21 is provided with a sleeve 3 at the corresponding position of the lead screw 41, the opening end of the sleeve 3 is provided with a nut 31, and the nut 31 is threadedly connected with the lead screw 41, the servo motor 4 drives the lead screw 41 to rotate, and the nut 31 drives the sliding sleeve 21 to move along the slide rod 2 through the sleeve 3 during the rotation of the lead screw 41; the mounting frame 5 is driven through the servo motor 4 and the lead screw 41, so that the high-precision adjustment of the oil-blocking felt 53 is realized, the problems of low work efficiency and the operation of reassembling in the traditional way are avoided, the work efficiency can be greatly improved, and manpower and time can be saved.

[0029] When the parallelism or surface defects of the entire roller are detected, the nut 31 can be detached 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 along the part of the slide rod 2 between the two lead screws 41, so that the roundness and surface defects of the entire roller can be detected through the subsequent detection steps.

[0030] Further, a screw hole is formed in the middle of the side surface of the sliding sleeve 21, and an adjusting screw 51 is threadedly connected in the screw hole, the tail end of the adjusting screw 51 is rotationally connected with the mounting frame 5, and the position of the mounting frame 5 is moved by rotating the adjusting screw 51, so that the mounting frame 5 can be attached to the roller with different diameters.

[0031] Further, a guide column 52 is arranged on the side surface of the mounting frame 5 corresponding to the sliding sleeve 21, and the guide column 52 horizontally moves through the sliding sleeve 21, so that the guide column 52 can support and guide the mounting frame 5.

[0032] Further, a threaded groove is formed in the position of the mounting frame 5 corresponding to the external thread cylinder 6, and the external thread cylinder 6 is threadedly connected in the threaded groove.

[0033] Further, a through hole is formed in the oil-blocking felt 53 and the mounting frame 5, so that the elastic column 7 pushes the ball 71 to pass through the through hole and contact the roller, the oil-blocking felt 53 can adsorb and wipe the process oil on the roller, and the oil film on the roller does not affect the detection through the ball 71.

[0034] Further, the width of the oil-blocking felt 53 is not less than 20 cm, and the upper and lower oil-blocking felts 53 are connected at the part inserted between the rollers, so that the oil-blocking felt 53 can block the process oil on the inlet side from splashing to the outlet side through the gap of the rollers, and the process oil adsorbed on the rollers can be wiped and blocked.

[0035] The application discloses a method for blocking oil of a rolling mill outlet side oil blocking device integrated with a rolling mill detection function. A support 1 is installed at the rolling mill outlet side and a sliding rod 2 is parallel to the rolling mill axis. Before rolling, the oil blocking felt 53 is adjusted as follows: first, the adjusting screw 51 is rotated, 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 press the rolling mill, under the action of the rolling mill, the part of the mounting frame 5 installed with the oil blocking felt 53 is deformed, and the oil blocking felt 53 is attached to the rolling mill; then, the servo motor 4 is controlled to work, the servo motor 4 drives the lead screw 41 to rotate through the coupling, the nut 31 drives the sliding sleeve 21 to move along the sliding rod 2 through the sleeve 3 in the rotating process of the lead screw 41, 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 the distance between the oil blocking felt 53 and the strip is controlled to be kept at a safe distance, so that the adjustment of the oil blocking felt 53 is completed; in the rolling process, the oil blocking felt 53 blocks and adsorbs the process oil sprayed from the rolling mill gap, until the rolling is completed.

[0036] Further, after the adjustment of the oil blocking felt 53 is completed, the external threaded cylinder 6 is rotated, the external threaded cylinder 6 drives the elastic column 7 to move in the rotating process, so that the elastic column 7 drives the rolling ball 71 to contact the surface of the rolling mill and generate a positive pressure; in the rolling process, the rolling ball 71 is always in abutment with the surface of the rolling mill, the radial force of the rolling mill is captured by the pressure sensor 61 through the elastic column 7, the pressure sensor 61 continuously collects the pressure data generated thereby and transmits the pressure data to the control system in real time, once the system identifies that the sensor reading suddenly exceeds the preset threshold value, it is determined that there is a surface defect at the corresponding position of the rolling mill.

[0037] Further, after the rolling is completed, the parallelism of the upper rolling mill and the lower rolling mill is detected, and 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, the nut 31 drives the sliding sleeve 21 to move along the sliding rod 2 through the sleeve 3 in the rotating process of the lead screw 41, 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 the mounting frame 5 drives the external threaded cylinder 6, the elastic column 7 and the rolling ball 71 to move synchronously along the axial direction of the rolling mill; in this process, the load applied to each elastic column 7 of the upper and lower rolling mills is synchronously collected by the corresponding pressure sensor 61, so that a pressure data set distributed along the axial direction of the rolling mill body is obtained; the parallelism of the upper and lower rolling mills can be evaluated by analyzing the pressure curves of the upper and lower rolling mills obtained on the same mounting frame 5: if the change trends of the two curves are synchronous and the pressure difference is constant, the parallelism is qualified; otherwise, if the difference presents regular or sudden fluctuation, it indicates that there is a parallelism deviation.

[0038] The present application can adjust the distance of the two side oil-proof felt 53 according to the width of the rolling strip, without manual adjustment, with fast adjustment speed, high precision, saving manpower, and can detect the roll roundness and surface state during rolling, and can detect the parallelism of the upper and lower rolls during non-rolling, with simple operation and convenient use.

[0039] The undisclosed parts in the present application are all prior art, and the specific structure, material and working principle are not described in detail. Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A mill exit side oil deflector integrated with a roll detection function, comprising a support (1), characterized in that: The support (1) is provided with two parallel sliding rods (2), the sliding rods (2) are provided with two sliding sleeves (21) which slide, the support (1) is provided with a driving element which drives the sliding sleeves (21) to move along the sliding rods (2), the side surface of the sliding sleeve (21) is provided with a mounting rack (5) which can move horizontally along the vertical direction of the sliding rod (2), the mounting rack (5) is a hollow structure, and the two inclined surfaces of the side of the mounting rack (5) away from the sliding sleeve (21) are provided with oil blocking felt (53), the inside of the mounting rack (5) is provided with an external thread cylinder (6), the inside of the external thread cylinder (6) is provided with an elastic column (7) which can slide along the axial direction, one end of the elastic column (7) inside the external thread cylinder (6) is provided with a pressure sensor (61), and the telescopic end of the elastic column (7) is provided with a rolling ball (71).

2. The mill exit side oil deflector integrated with roll detection function as claimed in claim 1 wherein: The driving element comprises a servo motor (4) mounted on the side surface of the support (1), the output shaft of the servo motor (4) is provided with a lead screw (41) through a shaft coupling, the part corresponding to the lead screw (41) of the sliding sleeve (21) is provided with a sleeve (3), and the opening end of the sleeve (3) is provided with a nut (31) which is in threaded connection with the lead screw (41).

3. The mill exit side oil deflector integrated with roll detection function as claimed in claim 2, wherein: The middle part of the side surface of the sliding sleeve (21) is provided with a screw hole, and the screw hole is in threaded connection with an adjusting screw (51), and the end of the adjusting screw (51) is in rotating connection with the mounting rack (5).

4. The mill exit side oil deflector integrated with roll detection function as claimed in claim 3 wherein: The side surface of the mounting rack (5) corresponding to the sliding sleeve (21) is provided with a guide column (52), and the guide column (52) horizontally moves through the sliding sleeve (21).

5. The mill exit side oil deflector integrated with roll detection function as claimed in claim 4 wherein: The part corresponding to the external thread cylinder (6) of the mounting rack (5) is provided with a threaded groove, and the external thread cylinder (6) is in threaded connection with the threaded groove.

6. The mill exit side oil deflector integrated with roll detection function as claimed in claim 5 wherein: The oil blocking felt (53) and the mounting rack (5) are both provided with a through hole, so that the elastic column (7) pushes the rolling ball (71) to pass through the through hole and contact the roller.

7. The integrated roller detection function of the mill outlet side oil blocking device of claim 6, and the width of the oil blocking felt (53) is not less than 20 cm, and the upper and lower two oil blocking felts (53) are connected when inserted into the part between the rollers.

8. A method of oil deflection at the exit side of a rolling mill with integrated roll detection function according to claim 7, characterized in that: The support (1) is installed at the outlet side of the rolling mill and ensures that the slide rod (2) is parallel to the roll axis; before rolling, the oil screen (53) is adjusted as follows: first, rotate the adjusting screw (51), the adjusting screw (51) drives the mounting bracket (5) to move along the guide column (52) direction, so that the mounting bracket (5) drives the oil screen (53) to contact and extrude the roll, under the action of the roll, the mounting bracket (5) installs the part of the oil screen (53) to deform, and the oil screen (53) is attached to the roll; then control the servo motor (4) to work, the servo motor (4) drives the lead screw (41) to rotate through the coupling, the nut (31) drives the sliding sleeve (21) to move along the slide rod (2) during the rotation of the lead screw (41), the sliding sleeve (21) drives the mounting bracket (5) and the oil screen (53) to move through the guide column (52) and the adjusting screw (51), and controls the oil screen (53) to keep a safe distance between the strip, so as to complete the adjustment of the oil screen (53); during rolling, the oil screen (53) shields and adsorbs the process oil sprayed from the roll gap, until the rolling is completed.

9. The oil retaining method of the mill exit side oil retaining device integrated with the roll detection function according to claim 8, characterized by: After the adjustment of the oil screen (53) is completed, the outer threaded cylinder (6) is rotated, the elastic column (7) is moved during the rotation of the outer threaded cylinder (6), so that the elastic column (7) pushes the rolling ball (71) to contact the roll surface and generates a positive pressure; during rolling, the rolling ball (71) is always in contact with the roll surface, 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 thereby and transmits it to the control system in real time, once the system identifies that the sensor reading exceeds the preset threshold, it is determined that there is a surface defect at the corresponding position of the roll.

10. The oil retaining method of the mill exit side oil retaining device integrated with the roll detection function according to claim 9, characterized by: After rolling is completed, the parallelism of the upper roll and the lower roll is detected, 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, the nut (31) drives the sliding sleeve (21) to move along the slide rod (2) during the rotation of the lead screw (41), the sliding sleeve (21) drives the mounting bracket (5) and the oil screen (53) to move through the guide column (52) and the adjusting screw (51), the mounting bracket (5) drives the outer threaded cylinder (6), the elastic column (7) and the rolling ball (71) to move synchronously along the axial direction of the roll; during this process, the load applied to each elastic column (7) of the upper and lower rolls is synchronously collected by the corresponding pressure sensor (61), so as to obtain the pressure data set 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 bracket (5), the parallelism can be evaluated: if the change trend of the two curves is synchronous and the pressure difference is constant, the parallelism is qualified; otherwise, if the difference presents regular or sudden fluctuation, it indicates that there is parallelism deviation.

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