Rolling mill and installation method of rolling mill side back-up roll
By designing a backing bearing structure with a specific outer diameter arrangement on the mill side support roll and using a precise installation method, the problem of unstable assembly of the mill side support roll was solved, resulting in higher support stability and extended spindle life.
Patent Information
- Application Number
- CN202511109706.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-08
- Publication Date
- 2025-10-21
AI Technical Summary
In the existing technology, the assembly precision of the mill side support rolls is insufficient, which leads to unstable support, damage to the backing bearings, and reduced stability of the work rolls.
A side support roll structure for a rolling mill is designed, which uses backing bearings with different outer diameters arranged in sequence, and sets the first backing bearing with the largest outer diameter in the middle section of the side support roll to ensure the consistency of the accuracy of the bearing's outer diameter and inner diameter. The assembly accuracy and stability are improved by the installation method.
It improves the support stability of the side support rollers on the work rolls, avoids deviation, extends the service life of the spindle, and enhances the operational reliability of the rolling mill.
Smart Images
Figure CN120815823A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of rolling mills, and in particular to a rolling mill and a method for installing side support rollers of the rolling mill. Background Art
[0002] The existing technology has very high requirements for the assembly precision of the side support rollers of the rolling mill, but there is currently a lack of assembly standards for the side support rollers. During the use of the rolling mill, the side support rollers may be subjected to abnormal forces, causing damage to the backing bearings on the side support rollers and reducing the stability of the side support rollers in supporting the working rolls. Summary of the Invention
[0003] The embodiments of the present application provide a rolling mill and a method for installing side support rollers of the rolling mill, aiming to improve the support stability of the side support rollers on the working rollers.
[0004] On the one hand, an embodiment of the present application provides a rolling mill, which includes a first working roll, a second working roll and a side support roll, wherein the first working roll and the second working roll are arranged side by side; the side support roll is located on the side of the first working roll away from the second working roll, and the side support roll is used to drive the first working roll to move toward the second working roll; wherein the side support roll includes a first backing bearing, a second backing bearing and a third backing bearing arranged along the extension direction of the first working roll, the first backing bearing is located between the second backing bearing and the third backing bearing, the outer diameter of the first backing bearing is larger than the outer diameter of the second backing bearing, and the outer diameter of the first backing bearing is larger than the outer diameter of the third backing bearing.
[0005] In the rolling mill provided by the present application, the second backing bearing, the first backing bearing and the third backing bearing are arranged in sequence on the side support roller, and the outer diameter of the first backing bearing is larger than the outer diameter of the second backing bearing, and the outer diameter of the first backing bearing is larger than the outer diameter of the third backing bearing. The outer diameter of the first backing bearing located in the middle section of the side support roller is the largest, so that the side support roller will not deviate in the process of supporting the first working roller and driving the first working roller to move toward the second working roller, thereby improving the support stability of the side support roller on the first working roller.
[0006] In some embodiments, the difference in outer diameters of two adjacent first backing bearings is less than 0.01 mm; there are multiple second backing bearings, and the difference in outer diameters of two adjacent second backing bearings is less than 0.01 mm; there are multiple third backing bearings, and the difference in outer diameters of two adjacent third backing bearings is less than 0.01 mm.
[0007] Through the above arrangement, the differences in outer diameters among the plurality of first backing bearings, the plurality of second backing bearings, and the plurality of third backing bearings are reduced, thereby improving the accuracy of the outer diameter of the entire side support roller, and further improving the support stability of the side support roller for the first working roller.
[0008] In some embodiments, the difference between the outer diameter of the first backing bearing and the outer diameter of the second backing bearing is less than 0.02 mm, and the difference between the outer diameter of the first backing bearing and the outer diameter of the third backing bearing is less than 0.02 mm.
[0009] Through the above arrangement, the difference in outer diameters of the first backing bearing, the second backing bearing and the third backing bearing on the entire side support roller is reduced, the accuracy of the outer diameter of the entire side support roller is improved, and the support stability of the side support roller to the first working roller is improved.
[0010] In some embodiments, the outer diameters of the first backing bearing, the second backing bearing, and the third backing bearing are 149 mm to 150 mm.
[0011] Through the above arrangement, the difference in outer diameters of the first backing bearing, the second backing bearing and the third backing bearing on the entire side support roller is reduced, the accuracy of the outer diameter of the entire side support roller is improved, and the support stability of the side support roller to the first working roller is improved.
[0012] In some embodiments, the lengths of the first backing bearing, the second backing bearing, and the third backing bearing in the extension direction of the first working roll are between 117.5 mm and 117.7 mm.
[0013] Through the above arrangement, the first backing bearing, the second backing bearing and the third backing bearing are similar in length direction, so that the first backing bearing, the second backing bearing and the third backing bearing can all be subjected to approximately the same force, thereby preventing a single backing bearing from being subjected to excessive force.
[0014] In some embodiments, the side support roller further includes a main shaft, the extension direction of the main shaft is the same as the extension direction of the first working roller, and the second backing bearing, the first backing bearing, and the third backing bearing are sleeved on the main shaft.
[0015] In some embodiments, the inner diameters of the first backing bearing, the second backing bearing, and the third backing bearing are 59.97 mm to 59.99 mm.
[0016] With the above arrangement, on the basis of limiting the outer diameters of the first backing bearing, the second backing bearing and the third backing bearing, the inner diameters of the first backing bearing, the second backing bearing and the third backing bearing are further limited, thereby improving the assembly accuracy of the entire side support roller.
[0017] In some embodiments, the outer diameter of the main shaft is 59.97 mm-59.99 mm.
[0018] On the other hand, the present application also provides a method for installing a rolling mill side support roller, the method comprising:
[0019] Selecting a first backing bearing, a second backing bearing, and a third backing bearing whose outer diameters are within a first range and whose inner diameters are within a second range, wherein the outer diameter of the first backing bearing is larger than the outer diameter of the second backing bearing and larger than the outer diameter of the third backing bearing;
[0020] Select a spindle with a diameter within the second range;
[0021] Mounting the plurality of backing bearings on the main shaft in sequence includes mounting the second backing bearing, the first backing bearing, and the third backing bearing on the main shaft in sequence.
[0022] The rolling mill installed by the method for installing the rolling mill side support roller provided by the present application has a second backing bearing, a first backing bearing and a third backing bearing arranged in sequence on the side support roller, and the outer diameter of the first backing bearing is larger than the outer diameter of the second backing bearing, and the outer diameter of the first backing bearing is larger than the outer diameter of the third backing bearing. The outer diameter of the first backing bearing located in the middle section of the side support roller is the largest, so that the side support roller will not deviate in the process of supporting the first working roller and driving the first working roller to move toward the second working roller, thereby improving the support stability of the side support roller on the first working roller.
[0023] In the above embodiment, the method for installing the rolling mill side support roller further includes rotating the main shaft by a preset angle.
[0024] Through the above settings, the pressure area of the spindle can be changed to extend the service life of the spindle. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 A schematic structural diagram of a rolling mill provided in an embodiment of the present application;
[0026] Figure 2 A schematic structural diagram of the side support roller provided in an embodiment of the present application;
[0027] Figure 3 A schematic diagram of the steps of the method for installing the side support rollers of the rolling mill provided in an embodiment of the present application.
[0028] Reference numerals: 100, rolling mill; 10, first working roll; 20, second working roll; 30, side support roll; 40, backing bearing; 41, first backing bearing; 42, second backing bearing; 43, third backing bearing; 50, main shaft. DETAILED DESCRIPTION
[0029] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.
[0030] In this article, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also include elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the statement "comprising a ..." do not exclude the presence of other identical elements in the process, method, article or equipment comprising the elements. The term "two or more" includes two or more than two cases.
[0031] An embodiment of the present application provides a rolling mill 100, which includes a first working roll 10, a second working roll 20 and a side support roll 30; wherein the first working roll 10 and the second working roll 20 are arranged side by side; the side support roll 30 is located on the side of the first working roll 10 away from the second working roll 20, and the side support roll 30 is used to drive the first working roll 10 to move toward the second working roll 20 so that the first working roll 10 and the second working roll 20 can roll the plate.
[0032] In the above embodiment, the side support roll 30 includes a plurality of backing bearings 40 arranged along the extension direction of the first working roll 10. The backing bearings 40 can be divided into a first backing bearing 41, a second backing bearing 42, and a third backing bearing 43. The first backing bearing 41 is located between the second backing bearing 42 and the third backing bearing 43. The outer diameter of the first backing bearing 41 is larger than the outer diameter of the second backing bearing 42, and the outer diameter of the first backing bearing 41 is larger than the outer diameter of the third backing bearing 43.
[0033] In the rolling mill 100 provided in the present application, a second backing bearing 42, a first backing bearing 41 and a third backing bearing 43 are sequentially arranged on the side support roller 30, and the outer diameter of the first backing bearing 41 is larger than the outer diameter of the second backing bearing 42, and the outer diameter of the first backing bearing 41 is larger than the outer diameter of the third backing bearing 43. The outer diameter of the first backing bearing 41 located in the middle section of the side support roller 30 is the largest, so that the side support roller 30 will not deviate in the process of supporting the first working roller 10 and driving the first working roller 10 to move toward the second working roller 20, thereby improving the support stability of the side support roller 30 on the first working roller 10.
[0034] In some embodiments, the outer diameters of all backing bearings 40 are within a certain range. For example, the outer diameters of the backing bearings 40 are 149 mm to 150 mm. That is, the outer diameters of the first backing bearing 41, the second backing bearing 42, and the third backing bearing 43 are all 149 mm to 150 mm. This configuration reduces the difference in outer diameters of the first backing bearing 41, the second backing bearing 42, and the third backing bearing 43 on the entire side support roll 30, improves the outer diameter accuracy of the entire side support roll 30, and thereby enhances the support stability of the side support roll 30 on the first work roll 10.
[0035] In conjunction with the aforementioned embodiment in which the outer diameter of the first backing bearing 41 is greater than the outer diameter of the second backing bearing 42, and the outer diameter of the first backing bearing 41 is greater than the outer diameter of the third backing bearing 43, the difference between the outer diameters of the first backing bearing 41 and the second backing bearing 42 is within a certain range, for example, the difference between the outer diameters of the first backing bearing 41 and the second backing bearing 42 is less than 0.02 mm. The difference between the outer diameters of the first backing bearing 41 and the third backing bearing 43 is also within a certain range, for example, the difference between the outer diameters of the first backing bearing 41 and the third backing bearing 43 is less than 0.02 mm. This arrangement further reduces the difference in outer diameters of the first, second, and third backing bearings 41, 42, and 43 on the entire side support roll 30, improves the accuracy of the outer diameter of the entire side support roll 30, and thereby enhances the support stability of the side support roll 30 on the first work roll 10.
[0036] In the above embodiment, there can be multiple first backing bearings 41, and the difference in outer diameters between two adjacent first backing bearings 41 is less than 0.01 mm; there can be multiple second backing bearings 42, and the difference in outer diameters between two adjacent second backing bearings 42 is less than 0.01 mm; there can be multiple third backing bearings 43, and the difference in outer diameters between two adjacent third backing bearings 43 is less than 0.01 mm.
[0037] Through the above arrangement, the differences in outer diameters among the plurality of first backing bearings 41, the plurality of second backing bearings 42, and the plurality of third backing bearings 43 are similarly reduced, thereby improving the accuracy of the outer diameter of the entire side support roller 30, and further improving the support stability of the side support roller 30 for the first working roller 10.
[0038] In some embodiments, the lengths of the first backing bearing 41 , the second backing bearing 42 , and the third backing bearing 43 in the extending direction of the first working roll 10 are between 117.5 mm and 117.7 mm.
[0039] Through the above arrangement, the first backing bearing 41, the second backing bearing 42 and the third backing bearing 43 are made to be similar in length direction, so that the first backing bearing 41, the second backing bearing 42 and the third backing bearing 43 can all be subjected to approximately the same force, thereby preventing a single backing bearing 40 from being subjected to excessive force.
[0040] In some embodiments, the side support roll 30 further includes a main shaft 50 extending in the same direction as the first work roll 10. The second backing bearing 42, the first backing bearing 41, and the third backing bearing 43 are sleeved on the main shaft 50. The inner diameters of the first backing bearing 41, the second backing bearing 42, and the third backing bearing 43 can all be between 59.97 mm and 59.99 mm. The outer diameter of the main shaft 50 is also between 59.97 mm and 59.99 mm. This reduces the clearance between the first backing bearing 41, the second backing bearing 42, and the third backing bearing 43 and the main shaft 50.
[0041] Through the above arrangement, on the basis of limiting the outer diameters of the first backing bearing 41, the second backing bearing 42 and the third backing bearing 43, the inner diameters of the first backing bearing 41, the second backing bearing 42 and the third backing bearing 43 are further limited, so that the assembly accuracy of the entire side support roller 30 can be improved.
[0042] Based on the side support rollers 30 in the rolling mill 100 described above, the present application further provides a method for installing the side support rollers 30 of the rolling mill 100. The method for installing the side support rollers 30 of the rolling mill 100 includes:
[0043] Preparation before assembly:
[0044] Arrange tools neatly and in place, ensuring standardized on-site operations. Lift them smoothly onto the work roll assembly and disassembly vehicle to prevent any bumps. Remove the end caps on both sides of the side support roll 30 and clean the end caps and backing bearing 40 with a cleaning agent. Wipe them clean with a machine cloth.
[0045] Check whether there are serious scratches, scrapes or abrasions on the outer surface of the outer ring of the backing bearing 40. If the surface of the backing bearing 40 is seriously scratched and can be felt, it needs to be replaced.
[0046] Check whether the rolling element of the backing bearing 40 is damaged. If the rolling element is damaged or dropped, replace it in time.
[0047] Check whether the inner ring of the backing bearing 40 is damaged and ensure that the oil hole of the inner ring is unobstructed. If the inner ring is damaged, replace it in time.
[0048] Use a dedicated needle to clean the exhaust holes on the front and rear end covers to ensure proper ventilation. Inspect the surface quality of the spindle 50. Sand any scratches or end surface damage with 400-grit sandpaper. Use a dedicated needle to inspect and clear all oil holes on the shaft and test with compressed air to ensure the oil flow is unobstructed. Wipe the roller box surface with a clean machine cloth. Wipe the partition surface with a clean machine cloth. Use an angle grinder to polish any partition surface that is severely sticky.
[0049] Assembly process:
[0050] S100: selecting a first backing bearing, a second backing bearing, and a third backing bearing with outer diameters within a first range and inner diameters within a second range, wherein the outer diameter of the first backing bearing is greater than the outer diameter of the second backing bearing and greater than the outer diameter of the third backing bearing.
[0051] In S100, the outer diameters of the first backing bearing 41, the second backing bearing 42, and the third backing bearing 43 are all 149 mm to 150 mm, and the inner diameters of the first backing bearing 41, the second backing bearing 42, and the third backing bearing 43 are all 59.97 mm to 59.99 mm.
[0052] S200: Select a spindle with a diameter within the second range.
[0053] In S200 , the outer diameter of the main shaft 50 is 59.97 mm to 59.99 mm.
[0054] Next, check the backing bearing 40 for deformation. If it is not deformed, measure its length to ensure it is between 117.5 mm and 117.7 mm. If it is out of tolerance, replace the bushing. This means ensuring the length of the first, second, and third backing bearings 41, 42, and 43 in the direction of extension of the first work roll 10 is between 117.5 mm and 117.7 mm.
[0055] S300: sequentially sleeve the plurality of backing bearings on the main shaft, including sequentially sleeve the second backing bearing, the first backing bearing, and the third backing bearing on the main shaft.
[0056] In some embodiments, the method for installing the side support rollers 30 of the rolling mill 100 further includes rotating the main shaft 50 by a preset angle to change the pressure area of the main shaft 50 and extend the service life of the main shaft 50 .
[0057] The rolling mill 100 is installed by the installation method of the side support roller 30 of the rolling mill 100 provided in the present application. The second backing bearing 42, the first backing bearing 41 and the third backing bearing 43 are arranged in sequence on the side support roller 30, and the outer diameter of the first backing bearing 41 is larger than the outer diameter of the second backing bearing 42, and the outer diameter of the first backing bearing 41 is larger than the outer diameter of the third backing bearing 43. The outer diameter of the first backing bearing 41 located in the middle section of the side support roller 30 is the largest, so that the side support roller 30 will not deviate in the process of supporting the first working roller 10 and driving the first working roller 10 to move toward the second working roller 20, thereby improving the support stability of the side support roller 30 on the first working roller 10.
[0058] It should be noted that, in the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.
[0059] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.
[0060] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.
[0061] Obviously, those skilled in the art may make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if such changes and modifications fall within the scope of the claims of this specification and their equivalents, this specification is intended to include such changes and modifications.
Claims
1. A rolling mill, characterized in that: include: a first working roll and a second working roll, wherein the first working roll and the second working roll are arranged side by side; a side support roller, the side support roller being located on a side of the first working roller away from the second working roller, the side support roller being used to drive the first working roller to move toward the second working roller; The side support roller includes a first backing bearing, a second backing bearing and a third backing bearing arranged along the extension direction of the first working roller. The first backing bearing is located between the second backing bearing and the third backing bearing. The outer diameter of the first backing bearing is larger than the outer diameter of the second backing bearing, and the outer diameter of the first backing bearing is larger than the outer diameter of the third backing bearing.
2. The rolling mill according to claim 1, characterized in that There are multiple first backing bearings, and the difference in outer diameters between two adjacent first backing bearings is less than 0.01 mm; there are multiple second backing bearings, and the difference in outer diameters between two adjacent second backing bearings is less than 0.01 mm; there are multiple third backing bearings, and the difference in outer diameters between two adjacent third backing bearings is less than 0.01 mm.
3. The rolling mill according to claim 2, characterized in that The difference between the outer diameters of the first backing bearing and the second backing bearing is less than 0.02 mm, and the difference between the outer diameters of the first backing bearing and the third backing bearing is less than 0.02 mm.
4. The rolling mill according to any one of claims 1 to 3, characterized in that The outer diameters of the first backing bearing, the second backing bearing and the third backing bearing are 149 mm to 150 mm.
5. The rolling mill according to any one of claims 1 to 3, characterized in that The lengths of the first backing bearing, the second backing bearing and the third backing bearing in the extension direction of the first working roll are between 117.5 mm and 117.7 mm.
6. The rolling mill according to any one of claims 1 to 3, characterized in that The side support roller further includes a main shaft, the extension direction of the main shaft is the same as the extension direction of the first working roller, and the second backing bearing, the first backing bearing, and the third backing bearing are sleeved on the main shaft.
7. The rolling mill according to claim 6, characterized in that The inner diameters of the first backing bearing, the second backing bearing and the third backing bearing are 59.97 mm to 59.99 mm.
8. The rolling mill according to claim 7, characterized in that The outer diameter of the main shaft is 59.97mm-59.99mm.
9. A method for installing a side support roller of a rolling mill, characterized in that: include: selecting a first backing bearing, a second backing bearing, and a third backing bearing having outer diameters within a first range and inner diameters within a second range, wherein the outer diameter of the first backing bearing is greater than the outer diameter of the second backing bearing and greater than the outer diameter of the third backing bearing; Selecting a main shaft with a diameter within the second range; Mounting the plurality of backing bearings on the main shaft in sequence includes mounting the second backing bearing, the first backing bearing, and the third backing bearing on the main shaft in sequence.
10. The method for installing a rolling mill side support roller according to claim 9, characterized in that: The method for installing the rolling mill side support roller further includes rotating the main shaft by a preset angle.