A quick roll changing positioning mechanism for work rolls of a cold rolling mill

Abstract

The utility model relates to cold rolling mill work roll technical field, concretely relates to a kind of cold rolling mill work roll quick roll changing positioning mechanism, including support frame, work roll body is provided in support frame, the both sides of support frame are equipped with positioning mechanism, and positioning mechanism is used to fix installation work roll body.Compared with prior art, the positioning assembly of hydraulic drive is set in the application, the linear motion of hydraulic cylinder can be accurately converted into the gathering and separating action of limiting frame, the quick positioning and release of work roll body are realized, the roll changing efficiency is significantly improved, the manual operation steps are reduced, the problems, such as the cumbersome disassembly and assembly of traditional bolt or wedge positioning mode and unreliable positioning, are avoided, the stable operation of work roll in rolling process is guaranteed, and the production safety and product quality are improved.

Description

Technical Field

[0001] This utility model relates to the field of cold rolling mill work roll technology, and in particular to a quick roll changing and positioning mechanism for cold rolling mill work rolls. Background Technology

[0002] Cold rolling mills, as the core equipment for cold rolling of metal sheets, are widely used in many industrial sectors such as steel and non-ferrous metals. The work rolls, as key components of the cold rolling mill, directly participate in the rolling and deformation process of the metal sheet. Their surface quality, dimensional accuracy, and operational stability play a decisive role in the quality of the rolled products. In actual production, due to the long-term exposure to high rolling forces and friction, the work rolls gradually wear down, and defects such as cracks and spalling may occur, seriously affecting the quality of the rolled products. Therefore, it is necessary to replace the work rolls regularly to ensure the normal operation of the cold rolling mill and the stability of the rolled product quality.

[0003] Traditional cold rolling mill roll changing and positioning methods have numerous drawbacks, severely restricting production efficiency and product quality. On one hand, roll changing efficiency is extremely low, relying heavily on manual operation or simple mechanical aids. Operators must spend considerable time and effort on tedious positioning and adjustments, such as using bolt tightening and shim adjustment to achieve axial positioning of the roll. This method is not only inefficient but also susceptible to operator skill and experience, resulting in long roll changing times and significantly impacting the cold rolling mill's production rhythm and capacity. On the other hand, positioning accuracy is severely insufficient. Traditional positioning methods lack effective mechanical linkage and precise guiding structures, making it prone to deviations during roll installation and positioning. This leads to axial movement or radial runout during rolling, affecting key indicators such as product thickness accuracy and shape quality, accelerating roll wear, shortening its service life, and increasing production costs. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a quick roll changing and positioning mechanism for cold rolling mill work rolls, so as to solve the problems of low roll changing efficiency and insufficient positioning accuracy in traditional methods.

[0005] To achieve the above objectives, this utility model provides a quick roll changing and positioning mechanism for a cold rolling mill work roll, comprising: a support frame, a work roll body disposed within the support frame, positioning mechanisms installed on both sides of the support frame, the positioning mechanisms being used to position and install the work roll body, the positioning mechanisms including a plurality of first limiting plates fixedly installed on one side of the support frame, a power plate slidably installed within the first limiting plates, a plurality of connecting columns fixedly installed on one side of the power plate, limiting frames slidably installed on the symmetrical sides of the support frame, the other side of the connecting columns being fixedly connected to one side of the limiting frames, a hydraulic cylinder installed on one side of the support frame, and the output end of the hydraulic cylinder being connected to one side of the power plate.

[0006] Preferably, bearing seats are snapped onto both ends of the work roller body, the bearing seats are slidably installed inside the support frame, and a baffle plate is fixedly installed on one side of the limiting frame, the baffle plate abutting against one side of the bearing seat.

[0007] Preferably, a plurality of sliding pillars are fixedly installed on one side of the limiting frame, and a first sliding groove is provided on the first limiting plate, wherein the sliding pillars are slidably installed in the first sliding groove.

[0008] Preferably, a fixing plate is fixedly installed on one side of the support frame, a third connecting shaft is fixedly installed on one side of the fixing plate, a connecting plate is rotatably installed on the third connecting shaft, a second connecting shaft is fixedly installed on both sides of the connecting plate, a connecting arm is rotatably installed on the second connecting shaft, a first connecting shaft is rotatably installed on the other side of the connecting arm, and one side of the first connecting shaft is fixedly connected to one side of the limiting frame.

[0009] Preferably, a plurality of second limiting plates are fixedly installed on one side of the support frame, and a second sliding groove is provided on the second limiting plate. A fourth connecting shaft is slidably installed in the second sliding groove, and one side of the fourth connecting shaft is fixedly installed on one side of the limiting frame.

[0010] Preferably, bearing assemblies are installed on both sides of the work roll body, the outer ring of the bearing assembly is installed in the inner hole of the bearing seat, the outer ring of the bearing assembly and the inner hole of the bearing seat are clearance fit, the end of the bearing seat is provided with an end cap for fixing the outer ring of the bearing assembly, the end cap is connected to the bearing seat by bolts, and the inner ring of the bearing assembly is installed on the journal of the work roll body by interference fit.

[0011] The beneficial effects of this utility model are:

[0012] 1. This type of rapid roll changing and positioning mechanism for cold rolling mill work rolls, by means of a positioning component, activates a hydraulic cylinder when roll changing is required. The output end of the hydraulic cylinder pushes a power plate to slide within the first groove of the first limiting plate. The power plate, through a connecting column, drives the two limiting frames on either side to move towards or away from each other along the support frame. During this movement, the sliding column maintains a stable trajectory by sliding along the first groove. Simultaneously, the limiting frames, through a first connecting shaft, drive a connecting arm to rotate around a second connecting shaft. The other end of the connecting arm is connected to a connecting plate through the second connecting shaft. The connecting plate rotates around a third connecting shaft on the fixed plate, thus rotating the linear motion of the hydraulic cylinder. The positioning mechanism transforms into a converging or separating action of the limiting frame. When the limiting frame converges towards the work roll body, the baffle plate and the bearing seats at both ends of the work roll abut tightly, achieving axial positioning of the work roll. When the hydraulic cylinder retracts, the power plate moves in the opposite direction, and the connecting arm and connecting plate work together to separate the limiting frame. The baffle plate releases its constraint on the bearing seats, and the positioning can be released for roll changing. The entire process, through the precise action of the positioning component, can quickly and stably achieve the positioning and release of the work roll, significantly improving the roll changing efficiency. Moreover, the positioning is accurate and reliable, ensuring the stable operation of the work roll during the cold rolling mill operation.

[0013] 2. This type of rapid roll changing positioning mechanism for cold rolling mill work rolls precisely converts the linear motion of the hydraulic cylinder into the synchronous convergence or separation action of the limit frame through a rod mechanism composed of a connecting plate and a connecting arm, realizing rapid positioning and release of the work roll body; the power plate and the second slide groove on the second limit plate cooperate to form a double guide structure, ensuring that the limit frame moves smoothly along the predetermined trajectory during hydraulic drive, avoiding motion jamming and skew; the entire positioning mechanism can not only respond quickly to the roll changing action, but also ensure the positioning accuracy and stability of the work roll during the rolling process, significantly improving roll changing efficiency and reducing the labor intensity of operators. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a three-dimensional structural diagram of the positioning component of this utility model;

[0017] Figure 3 This is a schematic diagram showing the disassembled structure of the working roller body, bearing housing, and bearing assembly of this utility model.

[0018] Figure 4 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0019] The diagram is marked as follows:

[0020] 1. Support frame; 2. Limiting frame; 3. First limiting plate; 4. First slide groove; 5. Hydraulic cylinder; 6. Sliding column; 7. Power plate; 8. Second limiting plate; 9. Second slide groove; 10. First connecting shaft; 11. Connecting arm; 12. Second connecting shaft; 13. Fixing plate; 14. Connecting plate; 15. Third connecting shaft; 17. Partition plate; 18. Work roller body; 19. Bearing seat; 20. Connecting column; 21. Bearing assembly; 22. Fourth connecting shaft. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0022] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] like Figures 1 to 4 As shown, the quick roll changing and positioning mechanism for a cold rolling mill work roll includes: a support frame 1, a work roll body 18 disposed inside the support frame 1, and positioning mechanisms installed on both sides of the support frame 1 for positioning and installing the work roll body 18; bearing assemblies 21 are installed on both sides of the work roll body 18, the outer ring of the bearing assembly 21 is installed in the inner hole of the bearing seat 19, the outer ring of the bearing assembly 21 and the inner hole of the bearing seat 19 are clearance fit, the end of the bearing seat 19 is provided with an end cap for fixing the outer ring of the bearing assembly 21, the end cap is connected to the bearing seat 19 by bolts, and the inner ring of the bearing assembly 21 is installed on the journal of the work roll body 18 by interference fit;

[0024] When it is necessary to replace the work roll, firstly, the positioning mechanisms on both sides of the support frame 1 are activated to release the locking state of the bearing housing 19, so that the entire bearing assembly 21, bearing housing 19 and work roll body 18 are in a movable state; then, the end cap bolts at the end of the bearing housing 19 are loosened, releasing the end cap from the fixed constraint of the bearing assembly 21 outer ring. At this time, since the bearing assembly 21 outer ring and the bearing housing 19 inner hole are clearance fit, the bearing assembly 21 outer ring can move freely in the bearing housing 19 inner hole; then, by releasing the interference fit restriction of the bearing assembly 21 inner ring on the work roll body 18 journal, or by directly using the roll changing device, the work roll body 18 together with the bearing assembly 21 inner ring are axially pulled out from the support frame 1, completing the entire quick roll changing process, which significantly improves the roll changing efficiency.

[0025] like Figure 2 , Figure 3 , Figure 4 As shown, the positioning mechanism includes several first limiting plates 3 fixedly installed on one side of the support frame 1. A power plate 7 is slidably installed inside the first limiting plate 3. Several connecting columns 20 are fixedly installed on one side of the power plate 7. Limiting frames 2 are slidably installed on both sides of the support frame 1. The other side of the connecting column 20 is fixedly connected to one side of the limiting frame 2. A hydraulic cylinder 5 is installed on one side of the support frame 1. The output end of the hydraulic cylinder 5 is connected to one side of the power plate 7. Bearing seats 19 are snapped into both ends of the work roller body 18. The bearing seats 19 are slidably installed inside the support frame 1. A partition plate 17 is fixedly installed on one side of the limiting frame 2. The partition plate 17 abuts against one side of the bearing seat 19. Several sliding columns 6 are fixedly installed on one side of the limiting frame 2. The first limiting plate 3 has a... The support frame 1 has a first sliding groove 4, and a sliding column 6 is slidably installed in the first sliding groove 4. A fixed plate 13 is fixedly installed on one side of the support frame 1, and a third connecting shaft 15 is fixedly installed on one side of the fixed plate 13. A connecting plate 14 is rotatably installed on the third connecting shaft 15. A second connecting shaft 12 is fixedly installed on both sides of the connecting plate 14. A connecting arm 11 is rotatably installed on the second connecting shaft 12. A first connecting shaft 10 is rotatably installed on the other side of the connecting arm 11. One side of the first connecting shaft 10 is fixedly connected to one side of the limiting frame 2. A plurality of second limiting plates 8 are fixedly installed on one side of the support frame 1. A second sliding groove 9 is opened on the second limiting plate 8. A fourth connecting shaft 22 is slidably installed in the second sliding groove 9. One side of the fourth connecting shaft 22 is fixedly installed on one side of the limiting frame 2.

[0026] When a roller change is required, hydraulic cylinder 5 is activated, and its output end pushes power plate 7 to slide within the first slide groove 4 of the first limiting plate 3. Power plate 7 drives the limiting frames 2 on both sides to move towards or away from each other along the support frame 1 via the fixed connecting column 20. When the limiting frame 2 moves, the sliding column 6 fixed on one side slides along the first slide groove 4 to maintain a stable movement trajectory. At the same time, the limiting frame 2 drives the connecting arm 11 to rotate around the second connecting shaft 12 via the first connecting shaft 10, and the other end of the connecting arm 11 is connected to the connecting plate 14 via the second connecting shaft 12. The third connecting shaft 15 on the fixed plate 13 rotates, converting the linear motion of the hydraulic cylinder 5 into the gathering or separating action of the limiting frame 2. When the limiting frame 2 gathers towards the working roller body 18, the baffle plate 17 on its side abuts tightly against the bearing seats 19 at both ends of the working roller. The axial positioning of the working roller is achieved through the cooperation between the limiting frame 2 and the bearing seats 19. Conversely, when the hydraulic cylinder 5 retracts, the power plate 7 moves in the opposite direction, and the linkage between the connecting arm 11 and the connecting plate 14 causes the limiting frame 2 to separate. The baffle plate 17 releases the constraint on the bearing seats 19, and the replacement can then be completed.

[0027] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0028] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A quick roll changing and positioning mechanism for a cold rolling mill work roll, characterized in that, include: A support frame (1) is provided with a working roller body (18) inside the support frame (1). Positioning mechanisms are installed on both sides of the support frame (1). The positioning mechanisms are used to position and install the working roller body (18). The positioning mechanisms include a plurality of first limiting plates (3) fixedly installed on one side of the support frame (1). A power plate (7) is slidably installed in the first limiting plate (3). A plurality of connecting columns (20) are fixedly installed on one side of the power plate (7). Limiting frames (2) are slidably installed on the symmetrical sides of the support frame (1). The other side of the connecting column (20) is fixedly connected to one side of the limiting frame (2). A hydraulic cylinder (5) is installed on one side of the support frame (1). The output end of the hydraulic cylinder (5) is connected to one side of the power plate (7).

2. The quick roll changing and positioning mechanism for cold rolling mill work rolls according to claim 1, characterized in that, The two ends of the working roller body (18) are fitted with bearing seats (19), the bearing seats (19) are slidably installed inside the support frame (1), and a partition plate (17) is fixedly installed on one side of the limiting frame (2), the partition plate (17) abuts against one side of the bearing seat (19).

3. The quick roll changing and positioning mechanism for cold rolling mill work rolls according to claim 2, characterized in that, A plurality of sliding pillars (6) are fixedly installed on one side of the limiting frame (2), and a first sliding groove (4) is provided on the first limiting plate (3), and the sliding pillars (6) are slidably installed in the first sliding groove (4).

4. The quick roll changing and positioning mechanism for cold rolling mill work rolls according to claim 3, characterized in that, A fixing plate (13) is fixedly installed on one side of the support frame (1), a third connecting shaft (15) is fixedly installed on one side of the fixing plate (13), a connecting plate (14) is rotatably installed on the third connecting shaft (15), a second connecting shaft (12) is fixedly installed on both sides of the connecting plate (14), a connecting arm (11) is rotatably installed on the second connecting shaft (12), a first connecting shaft (10) is rotatably installed on the other side of the connecting arm (11), and one side of the first connecting shaft (10) is fixedly connected to one side of the limiting frame (2).

5. The quick roll changing and positioning mechanism for cold rolling mill work rolls according to claim 4, characterized in that, A plurality of second limiting plates (8) are fixedly installed on one side of the support frame (1). A second sliding groove (9) is provided on the second limiting plate (8). A fourth connecting shaft (22) is slidably installed in the second sliding groove (9). One side of the fourth connecting shaft (22) is fixedly installed on one side of the limiting frame (2).

6. The quick roll changing and positioning mechanism for cold rolling mill work rolls according to claim 2, characterized in that, Bearing assemblies (21) are installed on both sides of the work roll body (18). The outer ring of the bearing assembly (21) is installed in the inner hole of the bearing seat (19). The outer ring of the bearing assembly (21) and the inner hole of the bearing seat (19) are clearance fit. The end of the bearing seat (19) is provided with an end cap for fixing the outer ring of the bearing assembly (21). The end cap is connected to the bearing seat (19) by bolts. The inner ring of the bearing assembly (21) is installed on the journal of the work roll body (18) by interference fit.

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