An adaptive roll cleaning device and method for large amount of grinding rolls of copper rolling mill

Abstract

This invention belongs to the field of metal strip rolling production technology, and specifically relates to an adaptive roll cleaning device and method for high-grinding-capacity rolls in copper rolling mills. An adaptive roll cleaning device for high-grinding-capacity rolls in copper rolling mills includes a frame, which is fixedly connected to supports on the operating side and the transmission side of the mill stand. A telescopic drive assembly is located in the middle of the frame, and a roll frame is connected to the lower part of the telescopic drive assembly. Supports are located at both ends of the roll frame, and roller shafts are mounted on the supports. Rolls are rotatably connected to the roller shafts. Guide assemblies are also located on both sides of the telescopic drive assembly, and the lower parts of the guide assemblies are fixedly connected to the roll frame. In the roll changing state, the invention automatically retracts the roll assembly into the mill stand window via a cylinder, without affecting normal roll changing. After the roll changing is completed, the cylinder can again drive the roll assembly to extend from the mill stand window, allowing the roll to contact the support roll surface, significantly shortening the roll changing time, reducing manual operation intensity, and improving production efficiency.

Description

Technical Field

[0001] This invention belongs to the field of metal strip rolling production technology, and specifically relates to an adaptive roll cleaning device and method for large grinding volume rolls in copper rolling mills. Background Technology

[0002] In the cold rolling process of copper strip, rough rolling is a critical step, undertaking the important task of significantly thinning the hot-rolled billet and improving the material's microstructure and properties. During rolling, the rolls are in continuous contact with the copper strip surface under high temperature and high pressure. Due to the large rolling force, severe deformation, and the relatively soft texture of copper, copper powder (or metal dust) is easily generated and detaches from the strip surface. At the same time, the emulsion used in rolling may carry impurities. These impurities coke on the roll surface after being heated, forming sticky dirt. If this copper powder and dirt are not removed in time, they will continue to adhere to the roll surface, causing surface defects in the rolled strip billet. This not only increases the processing burden of subsequent processes but also has a significant adverse impact on the overall product yield.

[0003] Currently, existing roll cleaning devices for copper rolling mills have many shortcomings. Their structure typically involves fixing materials such as rubber strips and felt to a fixed beam, which is then directly mounted on the support roll bearing housing. Each time the roll is ground or the support roll is disassembled, the cleaning device must be manually removed, replaced, and reinstalled, making the operation cumbersome and significantly increasing workload and time costs. Furthermore, copper strip roughing mills are characterized by large roll grinding volumes. Traditional roll cleaning devices, using a rigid fixing method, struggle to maintain continuous contact between the scraper and the roll surface throughout the rolling process, resulting in inconsistent cleaning performance. While some roll cleaning devices possess adaptive functions, most employ a spring-pressing mechanism, which still has significant drawbacks: springs are prone to plastic deformation over long-term use, leading to inconsistent contact force between the cleaner and the roll surface, affecting the reliability of the cleaning effect. Summary of the Invention

[0004] In the roughing process of existing copper rolling mills, problems arise due to the large amount of grinding on the rolls, the easy adhesion of copper powder and dirt, and the cumbersome disassembly and assembly, the difficulty in maintaining a continuous contact with the roll surface due to rigid fixing, and the poor cleaning effect caused by the plastic deformation of the spring pressing mechanism. The purpose of this invention is to provide an adaptive roll cleaning device and method for copper rolling mills with large grinding amounts. In the roll changing state, the device automatically retracts the roll assembly into the mill stand window through a cylinder, without affecting normal roll changing. After the roll changing is completed, the cylinder can drive the roll assembly to extend out of the mill stand window again, so that the roll contacts the support roll surface. This invention controls the contact pressure between the roll and the support roll surface in real time, so that the roll can maintain a tight contact throughout the entire process of the support roll diameter change, avoiding the contact failure problem caused by the roll diameter change of existing roll cleaning devices, and ensuring a continuous and stable roll cleaning effect.

[0005] The technical solution of the present invention is as follows: an adaptive roll cleaning device for large grinding volume rolls in copper rolling mills, comprising a frame, the frame being fixedly connected to a support on the operating side and the transmission side of the archway, a telescopic drive assembly being provided in the middle of the frame, a roll frame being connected to the lower part of the telescopic drive assembly, supports being provided at both ends of the roll frame, a roller shaft being provided on the support, and a roller being rotatably connected to the roller shaft, and guide assemblies being provided on both sides of the frame at the telescopic drive assembly, the lower part of the guide assemblies being fixedly connected to the roll frame.

[0006] The telescopic drive assembly includes a cylinder, with a double-ear ring bracket connected to the piston rod end of the cylinder. A single-ear ring bracket is connected to the lower part of the double-ear ring bracket. The single-ear ring bracket is fixedly connected to the roller frame. A pin is provided between the double-ear ring bracket and the single-ear ring bracket. The pin passes through the double-ear ring bracket and the single-ear ring bracket to realize the hinged connection between the cylinder and the roller frame.

[0007] The guiding assembly includes a guide rod, which is fixedly connected to the top of the roller frame and passes through a pre-set guide cavity on the frame. A sliding sleeve is provided in the guide cavity, and the sliding sleeve is slidably engaged with the guide rod.

[0008] The top of the guide rod is provided with a guide rod baffle.

[0009] Dust covers are also provided on both sides of the roller frame, and the dust covers cover the connection between the roller and the roller frame.

[0010] The roller is made of PU material, and it contacts the support roller surface through rolling friction.

[0011] An adaptive roll cleaning method for high-grinding-amount rolls in copper rolling mills, using an adaptive roll cleaning device for high-grinding-amount rolls in copper rolling mills as described above, includes the following steps: S1: The cleaning roll device is arranged along the axis of the support roll and is located on the left and right sides of the support roll respectively. Each cleaning roll device can operate independently. Under normal rolling mill operation, the cylinder is started to drive the roll frame and roll to extend towards the support roll so that the roll surface is in contact with the support roll surface. S2: When the support roller rotates, the roller rotates with the friction force, and the copper powder, sludge and coking matter on the surface of the support roller are adhered and removed by rolling contact. S3: When the rolling direction changes, the control system automatically switches the working state of the two cleaning roll devices according to the rolling direction signal, so that the rollers of the cleaning roll device on the feeding side are in contact with the support rollers, and the rollers of the cleaning roll device on the discharge side retract and disengage. S4: When a support roll replacement operation is required, the cylinder drives the roll frame and rolls to retract into the mill stand window to avoid the roll replacement path. S5: After the support roller is replaced, the cylinder drives the roller frame and roller to extend again, restoring the contact state between the roller and the support roller surface.

[0012] In step S1, the contact pressure between the roller and the support roller surface is controlled by adjusting the air pressure of the cylinder. The contact pressure range is 8.04~13.40 N / mm.

[0013] The technical advantages of this invention are as follows: 1. This invention achieves automatic extension and retraction control of the cleaning roll device through a cylinder drive. During roll changing, the cylinder-driven roller assembly automatically retracts into the mill stand window, without affecting normal roll changing operations. After roll changing is completed, the cylinder drives the roller assembly to automatically extend again, restoring its contact with the support roller. The entire process requires no manual intervention and no disassembly of the cleaning roll device, significantly shortening roll changing time, reducing manual labor intensity, and improving production efficiency. 2. This invention uses a cylinder drive to replace the traditional rigid fixing or spring pressing method. By adjusting the cylinder air pressure, the contact pressure between the roller and the support roller surface can be controlled in real time, ensuring that the roller maintains a tight contact throughout the entire process of support roller diameter changes. This avoids the contact failure problem caused by roller diameter changes in traditional cleaning roll devices, ensuring a continuous and stable cleaning effect. 3. This invention optimizes the sliding friction components such as rubber strips, felt, and scrapers of traditional cleaning roll devices into PU material rollers, upgrading the cleaning method from sliding friction to rolling friction. PU rollers remove copper powder, sludge, and coke deposits from the support roller surface through rolling contact. This results in a lower coefficient of friction, lower running resistance, effectively reducing wear on the support roller surface and extending its service life. Simultaneously, the PU material has elasticity and surface adhesion, effectively adhering to metal debris during rolling and improving the cleaning effect. 4. The device of this invention is configured as a pair, symmetrically arranged on both sides of the rolling mill along the support roller axis, and each cleaning device can operate independently. The control system can automatically switch the working state according to the rolling direction signal: when the strip is rolled from left to right, the left cleaning roller engages and the right retracts; when the strip is rolled from right to left, the right engages and the left retracts. This on-demand engagement method avoids ineffective wear caused by simultaneous contact on both sides, further protecting the support roller surface. 5. This invention has guide rod devices on both sides of the cylinder, with guide rod baffles at the top of the guide rods to limit the maximum extension stroke of the cleaning roller assembly. When the cylinder extends excessively due to air source failure or control malfunction, the guide rod baffle contacts the frame to prevent the roller from rigidly colliding with the support roller, thus avoiding equipment damage and safety accidents and meeting the stringent requirements of the rolling production line for safe operation of the equipment.

[0014] The following will provide further explanation in conjunction with the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an adaptive roll cleaning device for high-grinding rolls in copper rolling mills according to the present invention.

[0016] Figure 2 This is a side view schematic diagram of an adaptive roll cleaning device for high-grinding rolls in copper rolling mills according to the present invention.

[0017] Figure 3 This is a schematic diagram of the installation position of an adaptive roll cleaning device for high-grinding rolls in copper rolling mills according to the present invention.

[0018] Figure 4 This is a schematic diagram showing the working positions of the cleaning roll devices on both sides of the mill stand when the strip is rolled from left to right according to the present invention.

[0019] Figure 5 This is a schematic diagram showing the working positions of the cleaning roll devices on both sides of the mill stand when the strip is rolled from right to left according to the present invention.

[0020] Reference numerals in the attached drawings: 1-guide rod baffle, 2-guide rod, 3-cylinder, 4-sliding sleeve, 5-frame, 6-double ear ring bracket, 7-pin, 8-single ear ring bracket, 9-roller frame, 10-support, 11-dust cover, 12-roller shaft, 13-roller. Detailed Implementation Example 1

[0021] like Figures 1-5 As shown, an adaptive roll cleaning device for high-grinding-volume rolls in a copper rolling mill includes a frame 5, which is fixedly connected to a support on the operating side and the transmission side of the archway. A telescopic drive assembly is provided in the middle of the frame 5, and a roll frame 9 is connected to the lower part of the telescopic drive assembly. Supports 10 are provided at both ends of the roll frame 9, and a roller shaft 12 is provided on the support 10. The roller shaft 12 is rotatably connected to a roller 13. Guide assemblies are also provided on both sides of the telescopic drive assembly, and the lower part of the guide assemblies is fixedly connected to the roll frame 9.

[0022] In practical use, the device of this invention is fixedly installed on the support brackets of the operating side and transmission side of the rolling mill via the frame 5, ensuring that the entire roll cleaning device remains parallel to the axis of the support roll. During the operation of the rolling mill, the telescopic drive assembly drives the roll frame 9 and the roll 13 to extend towards the support roll, so that the roll 13 is in contact with the roll surface of the support roll. As the support roll rotates, the roll 13 rotates accordingly under the action of friction, removing copper powder, sludge, and coking matter adhering to the roll surface through rolling contact. The guide assembly ensures that the roll 13 runs smoothly during the telescopic process, avoiding skew or jamming. The entire device can automatically adjust the contact state according to the change of the support roll diameter without human intervention, ensuring a continuous and stable roll cleaning effect. Example 2

[0023] Based on Embodiment 1, in this embodiment, preferably, the telescopic drive assembly includes a cylinder 3, the piston rod end of the cylinder 3 is connected to a double-ear ring bracket 6, the lower part of the double-ear ring bracket 6 is connected to a single-ear ring bracket 8, the single-ear ring bracket 8 is fixedly connected to the roller frame 9, and a pin 7 is provided between the double-ear ring bracket 6 and the single-ear ring bracket 8. The pin 7 passes between the double-ear ring bracket 6 and the single-ear ring bracket 8 to realize the hinged connection between the cylinder 3 and the roller frame 9.

[0024] In practical use, the cylinder 3 of this invention serves as the driving source, and its piston rod is hinged to the roller frame 9 via a double-ear ring bracket 6, a pin 7, and a single-ear ring bracket 8. During actual operation, this hinged structure effectively absorbs radial deviations caused by unevenness or vibration on the support roller surface, ensuring that the roller 13 always fits the roller surface at the optimal angle, avoiding jamming or uneven wear caused by rigid connections. Furthermore, compared to hydraulic cylinders, cylinder drive offers more precise pressure control and faster response, allowing for real-time adjustment of the extension and retraction amount according to working conditions, adapting to continuous changes in the support roller diameter under conditions of high grinding volume. Example 3

[0025] Based on Embodiment 1, in this embodiment, preferably, the guiding component includes a guide rod 2, which is fixedly connected above the roller frame 9 and passes through a pre-set guide cavity on the frame 5. A sliding sleeve 4 is provided in the guide cavity, and the sliding sleeve 4 is slidably engaged with the guide rod 2.

[0026] In actual use, the guide rod 2 of this invention is fixed above the roller frame 9 and passes through the guide cavity of the frame 5, where a sliding sleeve 4 is provided. During operation, the guide rod 2 and the sliding sleeve 4 form a precise sliding fit, ensuring that the roller frame 9 and roller 13 move smoothly along a straight trajectory during extension and retraction, avoiding uneven contact or jamming of the roller surface due to skewness. The sliding sleeve 4 is made of wear-resistant material, maintaining good guiding accuracy even after long-term use, thus improving the overall reliability and service life of the device. Example 4

[0027] Based on Embodiment 1, in this embodiment, preferably, the top of the guide rod 2 is provided with a guide rod baffle 1.

[0028] In actual use, the top of the guide rod 2 of this invention is provided with a guide rod baffle 1 to limit the maximum extension stroke of the guide rod 2. In actual operation, if the cylinder 3 extends excessively due to air source failure or control failure, the guide rod baffle 1 will contact the top of the frame 5, preventing the roller 13 from moving further towards the support roller, preventing the roller 13 from rigidly colliding with the support roller, avoiding equipment damage and safety accidents, and playing a key mechanical limiting and protection role. Example 5

[0029] Based on Embodiment 1, in this embodiment, preferably, dust covers 11 are also provided on both sides of the roller frame 9, and the dust covers 11 cover the connection between the roller 13 and the roller frame 9.

[0030] In actual use, the roller frame 9 of this invention is provided with dust covers 11 on both sides, covering the connection between the roller 13 and the roller frame 9. In the actual rolling environment, there are a large amount of contaminants such as copper powder, emulsion spray, and sludge. The dust covers 11 can effectively prevent these impurities from entering the connection between the bearing and the roller shaft 12, preventing bearing jamming, accelerated wear, or poor rotation caused by foreign object intrusion, ensuring that the roller 13 maintains flexible rotation for a long time, improving the roller cleaning effect and equipment life. Example 6

[0031] Based on Example 1, in this embodiment, preferably, the roller 13 is made of PU material, and the roller 13 contacts the support roller surface through rolling friction.

[0032] In practical use, the roller 13 of this invention is made of PU material, forming rolling friction contact with the support roller surface during operation. The PU material has a certain degree of elasticity and surface adhesion, effectively adhering to copper powder, sludge, and coking deposits on the support roller surface during rolling, while preventing scratches or wear on the roller surface. Compared to the sliding friction of traditional rubber strips or felt, rolling friction has a lower coefficient of friction, lower running resistance, and less temperature rise on the roller surface, significantly extending the service life of the support roller and the cleaning roller device. Furthermore, when the PU roller contacts the rolling emulsion, it forms a physical barrier, effectively preventing emulsion from splashing onto the strip surface and avoiding emulsion contamination that could affect the strip surface quality. Example 7

[0033] An adaptive roll cleaning method for high-grinding-amount rolls in copper rolling mills, using an adaptive roll cleaning device for high-grinding-amount rolls in copper rolling mills as described above, includes the following steps: S1: The cleaning roll device is arranged along the axis of the support roll and is located on the left and right sides of the support roll respectively. Each cleaning roll device can operate independently. Under normal rolling mill operation, the starting cylinder 3 drives the roll frame 9 and the roll 13 to extend towards the support roll, so that the roll surface of the roll 13 is in contact with the roll surface of the support roll. S2: When the support roller rotates, the roller 13 rotates under the action of friction, and the copper powder, sludge and coking matter on the surface of the support roller are adhered to and removed by rolling contact. S3: When the rolling direction changes, the control system automatically switches the working state of the two cleaning roll devices according to the rolling direction signal, so that the roller 13 of the cleaning roll device on the feeding side is in contact with the support roller, and the roller 13 of the cleaning roll device on the discharge side retracts and disengages from the contact. S4: When a support roll replacement operation is required, cylinder 3 drives roll frame 9 and roll 13 to retract into the mill stand window to avoid the roll replacement path. S5: After the support roller is replaced, the cylinder 3 drives the roller frame 9 and roller 13 to extend again, restoring the contact state between roller 13 and the support roller surface.

[0034] In step S1, the contact pressure between roller 13 and support roller surface is controlled by adjusting the air pressure of cylinder 3. The contact pressure range is 8.04~13.40 N / mm.

[0035] This invention provides a fully automated roll cleaning process through a control system. After the mill starts, the system automatically controls the extension and retraction of the roll cleaning devices on both sides according to the rolling direction signal: when the strip is rolled from left to right, the roll 13 of the left roll cleaning device contacts the support roll, while the right roll cleaning device retracts and disengages; and vice versa. This on-demand contact method avoids ineffective wear caused by simultaneous contact on both sides. Before the roll changing operation, the cylinder 3 drives the roll 13 assembly to automatically retract into the archway window to avoid the roll changing path. After the roll changing is completed, it automatically extends to restore the roll cleaning state. The entire process requires no manual intervention. By adjusting the air pressure of the cylinder 3, the contact pressure between the roll 13 and the support roll can be precisely controlled to adapt to support rolls of different diameters and surface conditions, ensuring a stable and reliable roll cleaning effect. This method significantly improves the automation level and production efficiency of the roll cleaning operation, and reduces the intensity of manual operation and the risk of equipment failure.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An adaptive roll cleaning device for high-grinding-volume rolls in copper rolling mills, characterized in that: The frame (5) is fixedly connected to the support of the operating side and the transmission side of the archway. A telescopic drive assembly is provided in the middle of the frame (5). A roller frame (9) is connected to the lower part of the telescopic drive assembly. Supports (10) are provided at both ends of the roller frame (9). A roller shaft (12) is provided on the support (10). A roller (13) is rotatably connected to the roller shaft (12). A guide assembly is also provided on both sides of the telescopic drive assembly. The lower part of the guide assembly is fixedly connected to the roller frame (9).

2. The adaptive roll cleaning device for large grinding volume rolls in copper rolling mills according to claim 1, characterized in that: The telescopic drive assembly includes a cylinder (3), the piston rod end of the cylinder (3) is connected to a double earring bracket (6), the lower part of the double earring bracket (6) is connected to a single earring bracket (8), the single earring bracket (8) is fixedly connected to the roller frame (9), a pin (7) is provided between the double earring bracket (6) and the single earring bracket (8), the pin (7) passes between the double earring bracket (6) and the single earring bracket (8) to realize the hinged connection between the cylinder (3) and the roller frame (9).

3. The adaptive roll cleaning device for large grinding volume rolls in copper rolling mills according to claim 1, characterized in that: The guide assembly includes a guide rod (2), which is fixedly connected above the roller frame (9) and passes through a pre-set guide cavity on the frame (5). A sliding sleeve (4) is provided in the guide cavity, and the sliding sleeve (4) slides in cooperation with the guide rod (2).

4. The adaptive roll cleaning device for large grinding volume rolls in copper rolling mills according to claim 3, characterized in that: The top of the guide rod (2) is provided with a guide rod baffle (1).

5. The adaptive roll cleaning device for large grinding volume rolls in copper rolling mills according to claim 1, characterized in that: Dust covers (11) are also provided on both sides of the roller frame (9), and the dust covers (11) cover the connection between the roller (13) and the roller frame (9).

6. The adaptive roll cleaning device for large grinding volume rolls in copper rolling mills according to claim 1, characterized in that: The roller (13) is made of PU material, and the roller (13) contacts the support roller surface through rolling friction.

7. An adaptive roll cleaning method for high-grinding-amount rolls in copper rolling mills, using the adaptive roll cleaning device for high-grinding-amount rolls in copper rolling mills as described in claim 1, characterized in that: Includes the following steps: S1: The cleaning roll device is arranged along the axis of the support roll and is located on the left and right sides of the support roll respectively. Each cleaning roll device can operate independently. Under normal rolling mill operation, the starting cylinder (3) drives the roll frame (9) and the roll (13) to extend towards the support roll so that the roll surface of the roll (13) is in contact with the roll surface of the support roll. S2: When the support roller rotates, the roller (13) rotates under the action of friction, and the copper powder, sludge and coking matter on the surface of the support roller are adhered to and removed by rolling contact. S3: When the rolling direction changes, the control system automatically switches the working state of the two cleaning roller devices according to the rolling direction signal, so that the roller (13) of the cleaning roller device on the feeding side is in contact with the support roller, and the roller (13) of the cleaning roller device on the discharge side retracts and disengages from the contact. S4: When it is necessary to perform a support roll replacement operation, the cylinder (3) drives the roll frame (9) and the roll (13) to retract into the mill stand window to avoid the roll replacement path; S5: After the support roller is replaced, the cylinder (3) drives the roller frame (9) and roller (13) to extend again, restoring the contact state between the roller (13) and the support roller surface.

8. The adaptive roll cleaning method for large grinding volume rolls in copper rolling mills according to claim 7, characterized in that: In step S1, the contact pressure between the roller (13) and the support roller surface is controlled by adjusting the air pressure of the cylinder (3). The contact pressure range is 8.04~13.40 N / mm.

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