Axial locking structure of profile steel roughing mill

Abstract

The invention provides an axial locking structure of a profile steel roughing mill, which comprises a pressing plate, a locking mechanism and a locking mechanism, wherein a pressing boss corresponding to a roller system mounting frame is fixedly arranged on the pressing plate; the connecting rod penetrates through the mounting hole in the pressing plate and is fixedly connected with a rack of the rolling mill; the swing arms are in threaded connection with the end, away from the rack, of the connecting rod, the number of the swing arms is multiple, and the multiple swing arms are evenly arranged in the height direction; and the driving assembly is used for driving the swing arm to rotate along the connecting rod. The device has the beneficial effects that the hydraulic cylinder is used for controlling the locking and unlocking states to act rapidly, the roller gap adjusting rhythm in the rolling process is guaranteed, and the reversible rolling production technology is met.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of steel production, and particularly relates to a type steel rough rolling mill axial locking structure. BACKGROUND

[0002] The rough rolling mill is a frame type two-roll reversible rolling mill, and the rolling mill has higher rigidity and can roll a workpiece with better mechanical properties. In the production of the type steel, if the axial locking force of the roll is insufficient, the roll hole type will be axially dislocated, the hole type dislocation will cause the workpiece to be bent, twisted, and have an ear, the rolling groove will be unevenly worn, the rolling will be unstable, and the workpiece will be stacked. The axial movement not only affects the product quality, but also endangers the stability of the equipment operation and the service life of the workpiece. The type steel rough rolling mill can be reversibly rolled, and the roll gap of the rolling mill is dynamically adjusted online.

[0003] The current steel rough rolling mill axial locking structure is directly connected with the rack through a pressing plate through a bolt, the pressing plate presses the roll system mounting frame on the rack, and the roll system mounting frame is axially limited. During use, the following problems exist: when the roll gap needs to be adjusted, the bolt needs to be disassembled, the operation process is complex, the work efficiency is low, and the state of locking and opening cannot be switched, and the production process of reversible rolling cannot be adapted. SUMMARY

[0004] Therefore, the application aims to provide a type steel rough rolling mill axial locking structure to at least solve the above-mentioned technical problems.

[0005] To achieve the above-mentioned purposes, the technical scheme of the application is as follows:

[0006] A type steel rough rolling mill axial locking structure comprises:

[0007] A pressing plate, wherein a pressing protrusion corresponding to the roll system mounting frame is fixedly arranged on the pressing plate;

[0008] A connecting rod, wherein the connecting rod is fixedly connected with the rack of the rolling mill through a mounting hole on the pressing plate;

[0009] An oscillating arm, wherein the oscillating arm is threadedly connected with one end of the connecting rod away from the rack, the number of the oscillating arms is multiple, and the multiple oscillating arms are uniformly arranged along the height direction;

[0010] A driving assembly, wherein the driving assembly is used for driving the oscillating arm to rotate along the connecting rod.

[0011] Further, the number of the pressing plates is two, and the pressing protrusions of the two pressing plates press the two ends of the roll system mounting frame, respectively;

[0012] The pressing protrusion is fixedly provided with a first backing plate corresponding to the roll system mounting frame on the end face close to the roll system mounting frame, and the roll system mounting frame is fixedly provided with a second backing plate corresponding to the first backing plate.

[0013] Further, the end face of the first pad plate adjacent to the second pad plate is an inclined surface, and the thickness of the inclined surface of the first pad plate adjacent to one end of the roller system mounting frame is smaller than the thickness of the inclined surface of the first pad plate adjacent to the other end.

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

[0015] Further, the driving assembly is a hydraulic cylinder, the shell of the hydraulic cylinder is hinged to the rack, the output shaft of the hydraulic cylinder is hinged to the connecting plate, the connecting plate is hinged to one end of the plurality of swing arms away from the connecting rod, and the plurality of swing arms are arranged in parallel.

[0016] Further, the end of the swing arm away from the connecting rod is provided with a mounting groove matched with the connecting plate, the connecting plate is located on the inner side of the mounting groove, the connecting plate is provided with a first hinge hole, the swing arm is provided with a second hinge hole corresponding to the first hinge hole, and the hinge rod penetrates through the first hinge hole and the second hinge hole.

[0017] The side wall of the hinge rod is provided with a limiting groove, and the inner side of the limiting groove is provided with a first positioning plate which is fixedly connected to the swing arm through bolts.

[0018] Further, a first shaft sleeve is arranged between the hinge rod and the inner wall of the first hinge hole, the inner side of the first shaft sleeve is provided with an annular groove, the hinge rod is provided with a first oil injection hole, one end of the first oil injection hole is communicated with the annular groove, and the other end of the first oil injection hole is communicated with a first oil injection nozzle.

[0019] Further, a nut is fixedly arranged at the end of the swing arm adjacent to the connecting rod, and the nut is threadedly connected to the end of the connecting rod away from the rack.

[0020] A second shaft sleeve is fixedly arranged on the outer side of the connecting rod, a first washer is fixedly arranged on the outer side of the end of the second shaft sleeve adjacent to the nut, and a second washer is arranged between the nut and the first washer.

[0021] Further, the outer side wall of the nut is in a spline structure, the end of the swing arm adjacent to the connecting rod is provided with a spline hole matched with the nut, and the nut is arranged on the inner side of the spline hole.

[0022] The nut is provided with a locking plate, the locking plate is fixedly connected to the connecting rod through bolts, and a gap exists between the locking plate and the connecting rod when the locking structure is in a locked state.

[0023] Further, the end of the connecting rod away from the rack is a threaded portion, the connecting rod is provided with a second oil injection hole, one end of the second oil injection hole is provided with an opening corresponding to the nut at the threaded portion, the other end of the second oil injection hole is communicated with a second oil injection nozzle, and the locking plate is provided with a through hole corresponding to the second oil injection nozzle.

[0024] Further, the mounting hole is a strip-shaped hole, which is arranged obliquely, and is inclined downward near one end of the roller system mounting frame.

[0025] Compared with the prior art, the axial locking structure of the type steel rough rolling mill has the following beneficial effects:

[0026] The axial locking structure of the type steel rough rolling mill has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the application and are incorporated herein for explanation by illustrating a preferred embodiment of the present application. In the drawings:

[0028] Figure 1 The axial locking structure of the type steel rough rolling mill has the following beneficial effects:

[0029] Figure 2 The axial locking structure of the type steel rough rolling mill has the following beneficial effects: Figure 1 The axial locking structure of the type steel rough rolling mill has the following beneficial effects:

[0030] Figure 3 The axial locking structure of the type steel rough rolling mill has the following beneficial effects:

[0031] Figure 4 The axial locking structure of the type steel rough rolling mill has the following beneficial effects: Figure 3 The axial locking structure of the type steel rough rolling mill has the following beneficial effects:

[0032] Figure 5 The axial locking structure of the type steel rough rolling mill has the following beneficial effects: Figure 4 The axial locking structure of the type steel rough rolling mill has the following beneficial effects:

[0033] Figure 6 The axial locking structure of the type steel rough rolling mill has the following beneficial effects: Figure 4 The axial locking structure of the type steel rough rolling mill has the following beneficial effects:

[0034] BRIEF DESCRIPTION OF DRAWINGS

[0035] 1, rack; 2, roller system mounting frame; 3, pressing plate; 4, swing arm; 5, hydraulic cylinder; 6, connecting rod; 7, second shaft sleeve; 8, nut; 9, second gasket ring; 10, locking plate; 201, second gasket plate; 301, mounting hole; 302, first gasket plate; 303, pressing convex; 401, mounting groove; 402, hinged rod; 403, first oil injection hole; 404, first oil injection nozzle; 405, first positioning plate; 501, connecting plate; 502, first shaft sleeve; 503, annular groove; 601, second oil injection hole; 602, second oil injection nozzle; 701, first gasket ring. DETAILED DESCRIPTION

[0036] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0038] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0039] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0040] As Figures 1 to 6As shown, the axial locking structure of a section steel rough rolling mill comprises a pressing plate 3, a pressing boss 303 corresponding to the roller system mounting frame 2 is fixed on the pressing plate 3; a connecting rod 6 is fixedly connected with the rack 1 of the rolling mill through the mounting hole 301 on the pressing plate 3; a swing arm 4 is threadedly connected with the end of the connecting rod 6 away from the rack 1, the number of the swing arm 4 is multiple, and the multiple swing arms 4 are uniformly arranged along the height direction; and a driving assembly is used for driving the swing arm 4 to rotate along the connecting rod 6.

[0041] The connecting rod 6 is threadedly connected with the rack 1, and the connecting rod 6 and the rack 1 are radially limited by a limiting key to prevent the relative rotation of the connecting rod 6 and the rack 1, and when the threaded part of the connecting rod 6 is seriously worn, the limiting key can be disassembled to replace the connecting rod 6, and the connecting rod 6 can also be fixedly connected with the rack 1 by welding

[0042] The number of the pressing plate 3 is two, and the pressing bosses 303 of the two pressing plates 3 press the two ends of the roller system mounting frame 2 respectively; a first gasket plate 302 corresponding to the roller system mounting frame 2 is fixed on the end face of the pressing boss 303 close to the roller system mounting frame 2, and a second gasket plate 201 corresponding to the first gasket plate 302 is fixed on the roller system mounting frame 2. After a long time of use, when the first gasket plate 302 and the second gasket plate 201 are deformed, only the first gasket plate 302 and the second gasket plate 201 need to be replaced, without the need to replace the pressing plate 3, thereby reducing the maintenance cost.

[0043] The end face of the first gasket plate 302 close to the second gasket plate 201 is an inclined face, the thickness of the inclined face of the first gasket plate 302 close to one end of the roller system mounting frame 2 is smaller than that of the other end; the end face of the second gasket plate 201 close to the first gasket plate 302 is an inclined face, and the inclined face of the second gasket plate 201 matches the inclined face of the first gasket plate 302. The setting of the two inclined faces can gradually increase the gap between the first gasket plate 302 and the second gasket plate 201 when the pressing plate 3 is moved to the two sides, thereby facilitating the movement.

[0044] The driving assembly is a hydraulic cylinder 5, the housing of the hydraulic cylinder 5 is hinged with the rack 1, the output shaft of the hydraulic cylinder 5 is hinged with a connecting plate 501, the connecting plate 501 is hinged with the ends of the multiple swing arms 4 away from the connecting rod 6, the multiple swing arms 4 are arranged in parallel, and the synchronous rotation of the multiple swing arms 4 can be realized through the elongation and contraction of 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 connecting rod 6 via 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 the present invention, and not to limit them. Although the present invention 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 therein. 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 the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

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

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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