Axial locking structure of a rough rolling mill for shaped steel

Abstract

The utility model provides a kind of shape steel rough rolling mill axial locking structure, comprising: pressing plate, corresponding pressure boss is fixed with roller system mounting bracket on the pressing plate;Connecting rod, the connecting rod is fixedly connected with the rack of rolling mill and passes through the mounting hole on pressing plate;Swing arm, the swing arm is threadedly connected with the end of connecting rod away from rack, the number of swing arm is multiple, multiple swing arms are evenly arranged along height direction;Driving assembly, the driving assembly is used to drive swing arm to rotate along connecting rod.The utility model has beneficial effects: through hydraulic cylinder control locking and open state action is rapid, ensure that the adjustment rhythm of roll gap during rolling process, satisfy the production technology of reversible rolling.

Description

Technical Field

[0001] This utility model belongs to the field of steel production technology, and in particular relates to an axial locking structure for a roughing mill for profile steel. Background Technology

[0002] The roughing mill is a two-roll reversible mill with a gate design. This type of mill has higher rigidity and can roll materials with better mechanical properties. In the production of section steel, it has been found that if the axial locking force of the rolls is insufficient, it will cause axial misalignment of the roll pass. Misalignment of the roll pass will cause problems such as bending, torsion, earing, uneven wear of the roll groove, unstable rolling, and steel piling in the rolled workpiece. Axial movement not only affects product quality, but also endangers the stability of equipment operation and the service life of the workpiece. In addition, the roughing mill for section steel will perform reversible rolling, and the roll gap will be dynamically adjusted online.

[0003] The current axial locking structure of steel roughing mills is directly connected to the frame via bolts through a pressure plate. The pressure plate presses the roll system mounting frame onto the frame and limits the axial movement of the roll system mounting frame. The following problems exist during use: when it is necessary to adjust the roll gap, the bolts need to be removed, the operation process is complicated, the work efficiency is low, and it is impossible to switch between the locked and unlocked states, which cannot be adapted to the production process of reversible rolling. Utility Model Content

[0004] In view of this, the present invention aims to provide an axial locking structure for a steel roughing mill, in order to solve at least one of the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] An axial locking structure for a roughing mill for structural steel includes:

[0007] A pressure plate, wherein a pressing boss corresponding to the roller system mounting frame is fixedly provided on the pressure plate;

[0008] A connecting rod, which passes through a mounting hole in the pressure plate and is fixedly connected to the mill frame;

[0009] A swing arm is threadedly connected to the end of the connecting rod away from the frame. There are multiple swing arms, which are evenly arranged along the height direction.

[0010] A drive assembly for driving the swing arm to rotate along the connecting rod.

[0011] Furthermore, there are two pressure plates, and the pressing bosses of the two pressure plates press against both ends of the roller system mounting frame respectively;

[0012] The pressing boss is fixed with a first pad corresponding to the roller system mounting frame on its end face near the roller system mounting frame, and a second pad corresponding to the first pad is fixed on the roller system mounting frame.

[0013] Furthermore, the end face of the first pad adjacent to the second pad is an inclined surface, and the thickness of the inclined surface of the first pad at one end near the roller mounting frame is less than the thickness at the other end.

[0014] The end face of the second pad adjacent to the first pad is an inclined surface, and the inclined surface of the second pad matches the inclined surface of the first pad.

[0015] Furthermore, the driving component is a hydraulic cylinder, the housing of the hydraulic cylinder is hinged to the frame, the output shaft of the hydraulic cylinder is hinged to the connecting plate, and the connecting plate is hinged to the end of a plurality of swing arms away from the connecting rod, with the plurality of swing arms arranged in parallel.

[0016] Furthermore, the end of the swing arm away from the connecting rod has a mounting groove that matches the connecting plate. The connecting plate is located inside the mounting groove. The connecting plate has a first hinge hole. The swing arm has a second hinge hole corresponding to the first hinge hole. The hinge rod passes through the first hinge hole and the second hinge hole.

[0017] The hinge rod has a limit groove on its side wall, and a first positioning plate is provided inside the limit groove. The first positioning plate is fixedly connected to the swing arm by bolts.

[0018] Furthermore, a first bushing is provided between the hinge rod and the inner wall of the first hinge hole. An annular groove is opened on the inner side of the first bushing. A first oil injection hole is opened on the hinge rod. One end of the first oil injection hole is connected to the annular groove, and the other end is connected to the first oil injection nozzle.

[0019] Furthermore, a nut is fixed at one end of the swing arm near the connecting rod, and the nut is threadedly connected to the end of the connecting rod away from the frame;

[0020] A second bushing is fixed to the outside of the connecting rod, and a first washer is fixed to the outside of one end of the second bushing near the nut. A second washer is provided between the nut and the first washer.

[0021] Furthermore, the outer wall of the nut has a spline structure, and the end of the swing arm near the connecting rod has a spline hole that matches the nut, and the nut is installed inside the spline hole;

[0022] The nut is provided with a corresponding locking plate, which is fixedly connected to the connecting rod by bolts. When the locking structure is in the locked state, there is a gap between the locking plate and the connecting rod.

[0023] Furthermore, the end of the connecting rod away from the frame is a threaded part, and a second oil injection hole is opened on the connecting rod. One end of the second oil injection hole has an opening corresponding to the nut at the threaded part, and the other end is connected to the second oil injection nozzle. A through hole corresponding to the second oil injection nozzle is opened on the locking plate.

[0024] Furthermore, the mounting hole is a strip-shaped hole, which is inclined and the end of the strip-shaped hole adjacent to the roller system mounting frame is inclined downward.

[0025] Compared with the prior art, the axial locking structure for a roughing mill of profile steel described in this utility model has the following advantages:

[0026] The axial locking structure of the steel roughing mill described in this utility model uses a hydraulic cylinder to control the locking and unlocking states rapidly, which improves work efficiency, ensures the rhythm of roll gap adjustment during the rolling process, and meets the production process requirements of reversible rolling. Attached Figure Description

[0027] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0028] Figure 1 This is a front view schematic diagram of the axial locking structure of the roughing mill for steel profiles according to an embodiment of the present utility model;

[0029] Figure 2 As described in the embodiments of this utility model Figure 1 Schematic diagram of the structure at point A in the middle;

[0030] Figure 3 This is a schematic cross-sectional view of the axial locking structure of the roughing mill for steel profiles as described in this embodiment of the present invention.

[0031] Figure 4 As described in the embodiments of this utility model Figure 3 Schematic diagram of the structure at point B;

[0032] Figure 5 As described in the embodiments of this utility model Figure 4 Schematic diagram of the structure at point C;

[0033] Figure 6 As described in the embodiments of this utility model Figure 4 Schematic diagram of the structure at point D.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Frame; 2. Roller system mounting frame; 3. Pressure plate; 4. Swing arm; 5. Hydraulic cylinder; 6. Connecting rod; 7. Second bushing; 8. Nut; 9. Second washer; 10. Locking plate; 201. Second pad; 301. Mounting hole; 302. First pad; 303. Pressing boss; 401. Mounting groove; 402. Hinge rod; 403. First oil injection hole; 404. First oil injection nozzle; 405. First positioning plate; 501. Connecting plate; 502. First bushing; 503. Annular groove; 601. Second oil injection hole; 602. Second oil injection nozzle; 701. First washer. Detailed Implementation

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0037] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] like Figures 1 to 6As shown, an axial locking structure for a roughing mill for profile steel includes: a pressure plate 3, on which a pressing boss 303 corresponding to a roll system mounting frame 2 is fixedly provided; a connecting rod 6, which passes through a mounting hole 301 on the pressure plate 3 and is fixedly connected to the mill frame 1; a swing arm 4, which is threadedly connected to the end of the connecting rod 6 away from the mill frame 1, and there are multiple swing arms 4, which are evenly arranged along the height direction; and a drive assembly, which is used to drive the swing arms 4 to rotate along the connecting rod 6.

[0041] The connecting rod 6 is threaded to the frame 1, and the connecting rod 6 and the frame 1 are radially limited by a limit key to prevent relative rotation between the connecting rod 6 and the frame 1. When the threaded part of the connecting rod 6 is severely worn, the limit key can be removed and the connecting rod 6 can be replaced. The connecting rod 6 can also be fixedly connected to the frame 1 by welding.

[0042] There are two pressure plates 3, and the clamping bosses 303 of the two pressure plates 3 respectively clamp the two ends of the roller system mounting frame 2. A first pad 302 corresponding to the roller system mounting frame 2 is fixed on the end face of the clamping boss 303 near the roller system mounting frame 2, and a second pad 201 corresponding to the first pad 302 is fixed on the roller system mounting frame 2. After a long period of use, if the first pad 302 and the second pad 201 are deformed, only the first pad 302 and the second pad 201 need to be replaced, without replacing the pressure plates 3, thus reducing maintenance costs.

[0043] The end face of the first pad 302 adjacent to the second pad 201 is an inclined surface, and the thickness of the inclined surface of the first pad 302 at one end near the roller mounting bracket 2 is less than the thickness at the other end; the end face of the second pad 201 adjacent to the first pad 302 is also an inclined surface, and the inclined surface of the second pad 201 matches the inclined surface of the first pad 302. When the pressure plate 3 is moved to both sides, the gap between the first pad 302 and the second pad 201 gradually increases, facilitating movement.

[0044] The driving component is a hydraulic cylinder 5. The housing of the hydraulic cylinder 5 is hinged to the frame 1. The output shaft of the hydraulic cylinder 5 is hinged to the connecting plate 501. The connecting plate 501 is hinged to the end of the multiple swing arms 4 away from the connecting rod 6. The multiple swing arms 4 are arranged in parallel. The synchronous rotation of the multiple swing arms 4 can be achieved by extending and retracting the output shaft of the hydraulic cylinder 5.

[0045] The end of the swing arm 4 away from the connecting rod 6 has a mounting groove 401 that matches the connecting plate 501. The connecting plate 501 is located inside the mounting groove 401. The connecting plate 501 has a first hinge hole, and the swing arm 4 has a second hinge hole corresponding to the first hinge hole. The hinge rod 402 passes through the first hinge hole and the second hinge hole. The side wall of the hinge rod 402 has a limiting groove, and the inner side of the limiting groove is provided with a first positioning plate 405. The first positioning plate 405 is fixedly connected to the swing arm 4 by bolts. The first positioning plate 405 plays a radial limiting role for the hinge rod 402, preventing the hinge rod 402 and the swing arm 4 from rotating relative to each other.

[0046] A first bushing 502 is provided between the hinge rod 402 and the inner wall of the first hinge hole. An annular groove 503 is opened on the inner side of the first bushing 502. A first oil injection hole 403 is opened on the hinge rod 402. One end of the first oil injection hole 403 is connected to the annular groove 503, and the other end is connected to the first oil injection nozzle 404. Lubricating oil is added to the inner side of the annular groove 503 through the first oil injection nozzle 404 and the first oil injection hole 403 to extend the service life of the first bushing 502 and the hinge rod 402. The first bushing 502 is a structural component made of, but not limited to, copper.

[0047] A nut 8 is fixed to one end of the swing arm 4 near the connecting rod 6. The nut 8 is threaded to the end of the connecting rod 6 away from the frame 1. A second bushing 7 is fixed to the outside of the connecting rod 6. A first washer 701 is fixed to the outside of the second bushing 7 near the nut 8. A second washer 9 is provided between the nut 8 and the first washer 701. The second bushing 7 serves to protect the connecting rod 6.

[0048] In some embodiments, the outer wall of the nut 8 is a spline structure, and the end of the rocker arm 4 near the connecting rod 6 has a spline hole that matches the nut 8. The nut 8 is installed inside the spline hole. The nut 8 is provided with a locking plate 10, which is fixedly connected to the connecting rod 6 by bolts.

[0049] In some embodiments, the nut 8 is welded and fixedly connected to the rocker arm 4.

[0050] When the locking structure is in the locked state, there is a gap (1mm) between the locking plate 10 and the connecting rod 6.

[0051] The end of the connecting rod 6 furthest from the frame 1 is threaded. A second oil injection hole 601 is provided on the connecting rod 6. One end of the second oil injection hole 601 has an opening corresponding to the nut 8 at the threaded portion, and the other end connects to a second oil injection nozzle 602. A through hole corresponding to the second oil injection nozzle 602 is provided on the locking plate 10. Lubricating oil is added to the side wall of the threaded portion through the second oil injection nozzle 602 and the second oil injection hole 601, reducing friction between the threaded portion and the nut 8 and extending the service life of the connecting rod 6.

[0052] Mounting hole 301 is a strip-shaped hole, which is inclined, with the end of the strip-shaped hole near the roller system mounting frame 2 tilting downwards. Under the action of gravity, the connecting rod 6 is located inside the end of mounting hole 301 away from the roller system mounting frame 2.

[0053] Work process:

[0054] Locking state movement process: The output shaft of hydraulic cylinder 5 retracts, and the retraction position is controlled by a magnetostrictive displacement sensor. This, in turn, drives all swing arms 4 to rotate along the connecting rod 6 via the connecting plate 501 (e.g., Figure 1 (Position of the left swing arm 4), rotate until the center line of the swing arm 4 forms a 30° angle with the horizontal. At this time, the nut 8 moves towards the frame 1, tightening the second washer 9, the first washer 701, and the pressure plate 3, and pressing the boss 303 to press the roller system mounting bracket 2 and the frame 1. At this time, it is in the locked state, and the gap between the nut 8 and the locking cover is 1mm.

[0055] Open state movement process: When the opening degree of the upper roll needs to be adjusted during the rolling process, the output shaft of the hydraulic cylinder 5 extends, and the extension position is controlled by the magnetostrictive displacement sensor. Through the connecting plate 501, it drives all the swing arms 4 to rotate along the connecting rod 6 (e.g., Figure 1 (Position of right-side swing arm 4), the center line of swing arm 4 forms a 30° angle with the horizontal. At this time, nut 8 moves away from frame 1, which is the open state. The thread specification of the threaded part is M64×4, the pitch is 4mm, and the stroke of rotating 60° is 0.7mm. At this time, the gap between nut 8 and second washer 9 is 0.7mm. Pressure plate 3 is released, and a gap is created between pressure plate 3 and upper bearing seat, so that upper bearing seat can move smoothly.

[0056] Once the roll gap adjustment is complete, the mechanism is switched to the locked state. During the reversible rolling process, the locking and unlocking states are repeatedly operated to ensure smooth rolling.

[0057] Beneficial effects:

[0058] The locking and unlocking actions are controlled rapidly by hydraulic cylinder 5, ensuring the rhythm of roll gap adjustment during the rolling process and meeting the production process requirements of reversible rolling.

[0059] The hydraulic cylinder 5 is equipped with a magnetostrictive displacement sensor to ensure that the movement position of the mechanism is precise and controllable, so that the locking force is neither too large to cause the threads to seize, nor too large to cause the swing arm 4 to open and dislodge from the threaded part.

[0060] The pressure is adjustable online. When it is determined from the finished rolled product that the product quality defect is caused by the axial movement of the roll, the formation of the output shaft of the hydraulic cylinder 5 can be adjusted online to adjust the locking force.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

[0062] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An axial locking structure for a section steel roughing mill, characterized in that, include: A pressure plate (3) is fixedly provided with a pressing boss (303) corresponding to the roller system mounting frame (2); A connecting rod (6) passes through the mounting hole (301) on the pressure plate (3) and is fixedly connected to the frame (1) of the rolling mill; A swing arm (4) is threaded to the end of the connecting rod (6) away from the frame (1). There are multiple swing arms (4), and the multiple swing arms (4) are evenly arranged along the height direction. A drive assembly for driving the swing arm (4) to rotate along the connecting rod (6).

2. The axial locking structure for a roughing mill of profile steel according to claim 1, characterized in that: The number of pressure plates (3) is two, and the pressing bosses (303) of the two pressure plates (3) press the two ends of the roller system mounting frame (2) respectively; The pressing boss (303) is fixed on the end face of the roller system mounting frame (2) with a first pad (302) corresponding to the roller system mounting frame (2), and the roller system mounting frame (2) is fixed on a second pad (201) corresponding to the first pad (302).

3. The axial locking structure for a roughing mill of profile steel according to claim 2, characterized in that: The end face of the first pad (302) near the second pad (201) is an inclined surface, and the thickness of the inclined surface of the first pad (302) at one end near the roller mounting frame (2) is less than the thickness at the other end. The end face of the second pad (201) adjacent to the first pad (302) is an inclined surface, and the inclined surface of the second pad (201) matches the inclined surface of the first pad (302).

4. The axial locking structure for a roughing mill of profile steel according to claim 1, characterized in that: The driving component is a hydraulic cylinder (5). The housing of the hydraulic cylinder (5) is hinged to the frame (1). The output shaft of the hydraulic cylinder (5) is hinged to the connecting plate (501). The connecting plate (501) is hinged to one end of a plurality of swing arms (4) away from the connecting rod (6). The plurality of swing arms (4) are arranged in parallel.

5. The axial locking structure for a roughing mill of profile steel according to claim 4, characterized in that: The swing arm (4) has a mounting groove (401) that matches the connecting plate (501) at the end away from the connecting rod (6). The connecting plate (501) is located inside the mounting groove (401). The connecting plate (501) has a first hinge hole. The swing arm (4) has a second hinge hole that corresponds to the first hinge hole. The hinge rod (402) passes through the first hinge hole and the second hinge hole. The hinge rod (402) has a limiting groove on its side wall, and a first positioning plate (405) is provided inside the limiting groove. The first positioning plate (405) is fixedly connected to the swing arm (4) by bolts.

6. The axial locking structure for a roughing mill of profile steel according to claim 5, characterized in that: A first bushing (502) is provided between the hinge rod (402) and the inner wall of the first hinge hole. An annular groove (503) is opened on the inner side of the first bushing (502). A first oil injection hole (403) is opened on the hinge rod (402). One end of the first oil injection hole (403) is connected to the annular groove (503), and the other end is connected to the first oil injection nozzle (404).

7. The axial locking structure for a roughing mill of profile steel according to claim 1, characterized in that: The swing arm (4) is fixed with a nut (8) at one end near the connecting rod (6), and the nut (8) is threadedly connected to the end of the connecting rod (6) away from the frame (1); A second bushing (7) is fixedly provided on the outside of the connecting rod (6). A first washer (701) is fixedly provided on the outside of the second bushing (7) near the nut (8). A second washer (9) is provided between the nut (8) and the first washer (701).

8. The axial locking structure for a roughing mill of structural steel according to claim 7, characterized in that: The outer wall of the nut (8) is a spline structure, and the end of the swing arm (4) near the connecting rod (6) has a spline hole that matches the nut (8). The nut (8) is installed inside the spline hole. The nut (8) is provided with a locking plate (10), which is fixedly connected to the connecting rod (6) by bolts. When the locking structure is in the locked state, there is a gap between the locking plate (10) and the connecting rod (6).

9. The axial locking structure for a roughing mill of structural steel according to claim 8, characterized in that: The end of the connecting rod (6) away from the frame (1) is threaded. The connecting rod (6) has a second oil injection hole (601). One end of the second oil injection hole (601) has an opening corresponding to the nut (8) at the threaded part, and the other end is connected to the second oil injection nozzle (602). The locking plate (10) has a through hole corresponding to the second oil injection nozzle (602).

10. The axial locking structure for a roughing mill of profile steel according to claim 1, characterized in that: The mounting hole (301) is a strip-shaped hole, which is inclined and the end of the strip-shaped hole near the roller mounting frame (2) is inclined downward.

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