Composite short stress rolling mill with axial misalignment quick correction structure

Abstract

The present application relates to the technical field of rolling mill, and especially relates to a composite short stress rolling mill with axial misalignment quick correction structure, which comprises a bottom plate, a stand column arranged on the bottom plate, a lower roller assembly arranged on the stand column, and an upper roller assembly arranged on the stand column and above the lower roller assembly, and the upper roller assembly is provided with a correction structure. The upper roller assembly and the lower roller assembly roll materials, and in the process, a correction plate is installed between two mounting blocks, the correction plate is in close contact with the upper roller, and a correction block is embedded in a correction groove. When the upper roller has a tendency to produce axial misalignment force in the working process, the correction block can limit the upper roller through the correction groove, and the left and right ends of the correction plate abut on the mounting blocks respectively, so that the rotation of the upper roller is limited, the generation of axial misalignment is prevented, and the axial misalignment force is corrected, thereby improving the stability of the short stress rolling mill.

Description

Technical Field

[0001] This invention relates to the technical field of rolling mills, and in particular to a composite short-stress rolling mill with a rapid axial misalignment correction structure. Background Technology

[0002] With the development of the steel industry and the increasing demands of users for steel quality, rolling mills are placing higher requirements on their rolling mills. Short-stress-line rolling mills offer advantages such as high rigidity, high product precision, light weight, and simple operation. A short-stress rolling mill refers to a mill with a shortened stress loop. The stress loop is a closed loop formed by the unit internal forces of various load-bearing components, such as the mill base, under the action of rolling force. The elastic deformation of these components is directly proportional to their length; therefore, shortening the stress loop reduces the elastic deformation of the rolling mill and increases the rigidity of the mill base.

[0003] Axial misalignment of the upper and lower roll passes, caused by axial movement of the rolls or other reasons, prevents the rolling of workpieces with the correct shape and size, affecting product quality. This defect is called roll misalignment. In the prior art, utility model patent CN212093734U discloses a rapid repair device for axial roll misalignment in a short-stress rolling mill, including a bearing housing; a pull rod movably sleeved inside the bearing housing; a copper nut fitted onto the pull rod; an annular protrusion protruding from the copper nut and abutting against the inner wall of the bearing housing; a bushing positioned above the annular protrusion, at the gap between the inner wall of the bearing housing and the outer wall of the copper nut; the bushing fitted onto the copper nut; by providing a bushing between the copper nut and the inner wall of the bearing, elastic deformation of the pull rod during rolling is prevented, reducing the occurrence of roll misalignment.

[0004] However, in actual use, the causes of axial movement in short-stress rolling mills are complex, and simply strengthening the tie rods and bearing housings cannot effectively solve this problem. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a composite short-stress rolling mill with a rapid axial misalignment correction structure.

[0006] The above-mentioned objective of this invention is achieved through the following technical solutions:

[0007] A composite short-stress rolling mill with an axial misalignment rapid correction structure includes a base plate, a column mounted on the base plate, a lower roll assembly mounted on the column, and an upper roll assembly mounted on the column and located above the lower roll assembly. The upper roll assembly is provided with a correction structure. The upper roll assembly includes two upper mounting blocks mounted on the column and an upper roll rotatably connected to the upper mounting blocks. Each of the two mounting blocks has a mounting groove on its opposite side. The correction structure includes a correction plate mounted in the mounting groove and abutting against the bottom of the mounting groove. The correction plate is slidably connected to the upper roll. A correction groove is formed on the circumferential surface of the upper roll. The correction plate is provided with a correction block embedded in the correction groove and slidably connected to the correction groove.

[0008] By adopting the above technical solution, during operation, the upper and lower roll assemblies roll the material. During this process, a straightening plate is installed between two mounting blocks, with the straightening plate and the upper roll in close contact. The straightening blocks are embedded in the straightening grooves. When the upper roll tends to misalign during operation, generating axial misalignment force, the straightening blocks can limit the upper roll through the straightening grooves. The left and right ends of the straightening plate abut against the mounting blocks, thereby limiting the rotation of the upper roll, preventing axial misalignment, and correcting the axial misalignment force, thus improving the stability of the short-stress rolling mill.

[0009] Preferably, the correction plate includes at least two cooperating correction units, each correction unit corresponds to at least one correction block and a corresponding correction groove, and a first elastic component is provided between adjacent correction units.

[0010] By adopting the above technical solution, a first elastic component is provided between the correction units, and each correction unit corresponds to at least one correction block and the corresponding correction groove. When the upper roll itself generates a small amount of axial deformation during operation, the first elastic component is compressed. Using its rebound force, the small deformation of the upper roll is reset, reducing the axial misalignment of the upper roll and extending the working life and stability of the upper roll.

[0011] Preferably, a second elastic component is installed between the correction plate and the bottom of the mounting groove.

[0012] By adopting the above technical solution, when the upper roll is axially misaligned, the second elastic component is compressed to form a certain buffer. At the same time, by utilizing its rebound force, the slight misalignment of the upper roll is reduced on the one hand, and the slight misalignment of the upper roll is reset on the other hand, which extends the working life of the short stress rolling mill with the correction structure and further improves the working stability of the short stress rolling mill.

[0013] Preferably, the first elastic component includes piston cylinders respectively disposed on adjacent correction units, each piston cylinder having a piston head embedded therein, the piston head and the piston cylinder forming a sealed space, a connecting rod being disposed between the two piston heads, and a deformation medium being filled between the bottom of the piston cylinder and the piston head.

[0014] By adopting the above technical solution, when the upper roll undergoes elongation deformation, the piston head moves from inside the piston cylinder away from the bottom of the piston cylinder, thereby creating a negative pressure state between the piston head and the piston cylinder, thus generating a reaction force against the elongation deformation of the upper roll. As the deformation increases, the reaction force also increases, preventing the upper roll from continuing to elongate. At the same time, under the action of the reaction force, the deformation of the upper roll is restored.

[0015] When the upper roll undergoes shortening deformation, the piston head moves towards the bottom of the piston cylinder, thereby compressing the deformation medium through the piston head and piston cylinder. This generates a reaction force against the shortening deformation of the upper roll. As the deformation increases, the reaction force also increases, preventing the upper roll from continuing to shorten. At the same time, the reaction force promotes the restoration of the upper roll deformation.

[0016] Preferably, the piston cylinder includes a movable part and a compression part away from the piston head, wherein the cross-sectional area of ​​the compression part is smaller than the cross-sectional area of ​​the movable part in the direction perpendicular to the movement of the piston head.

[0017] By adopting the above technical solution, when the piston head moves in the moving part, the volume of the deformation medium changes. Since the cross-sectional area of ​​the compression part is smaller than that of the moving part, the pressure change in the piston head and piston cylinder is more obvious, thereby generating a larger reaction force and further improving the stability of the upper roll.

[0018] Preferably, the cross-sectional area of ​​the compression section gradually decreases from the direction close to the moving part to the direction far away from the moving part.

[0019] By adopting the above technical solution, as the piston head moves further, the pressure change in the piston head and piston cylinder is much greater than the change in the piston head's moving distance, thus generating a greater reaction force on the formation of the upper roll and further improving the stability of the upper roll.

[0020] Preferably, each of the adjacent correction units has a receiving groove on the side that is close to each other to accommodate the piston cylinder.

[0021] By adopting the above technical solution and setting up the receiving groove, installation space is provided for the piston cylinder, thereby improving the stability of the correction structure.

[0022] Preferably, the correction groove has an arc-shaped radial section along the upper roller, and the correction block is an arc-shaped block that fits into the correction groove.

[0023] By adopting the above technical solution, the correction groove and correction block are designed in an arc shape, which increases the contact area between the correction groove and correction block. On the one hand, this improves the stress strength of the correction groove and correction block, and on the other hand, it reduces the wear between the correction groove and correction block, thereby improving the reliability of the correction structure.

[0024] Preferably, the surface of the correction block is provided with a lubrication groove along the movement direction of the upper roller, and the lubrication groove is filled with lubricating oil.

[0025] By adopting the above technical solution, the frictional force when the correction block and the correction groove move relative to each other is reduced by opening the lubrication groove and filling the lubricating oil, thus extending the service life of the correction structure.

[0026] In summary, the present invention has at least one of the following beneficial technical effects:

[0027] 1. The correction block can limit the upper roll through the correction groove, thereby improving the stability of the upper roll operation;

[0028] 2. When the upper roll itself undergoes a slight axial deformation during operation, the first elastic component is compressed. Using its rebound force, the slight deformation of the upper roll is reset, reducing the axial misalignment of the upper roll and extending its working life and stability.

[0029] 3. When the upper roll is axially misaligned, the second elastic component is compressed to form a certain buffer. At the same time, its rebound force is used to reduce the slight misalignment of the upper roll on the one hand, and to reset the slight misalignment of the upper roll on the other hand, thus extending the working life of the short stress mill with the correction structure and further improving the stability of the short stress mill. Attached Figure Description

[0030] Figure 1 This is a frontal schematic diagram of a short-stress rolling mill.

[0031] Figure 2 This is a top view of the mounting block and the alignment plate being installed.

[0032] Figure 3 This is a schematic diagram of the installation of the upper roller and the straightening plate.

[0033] Figure 4 This is a schematic diagram showing the interaction between the correction structure and the upper roller.

[0034] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0035] In the diagram, 1 is the base plate; 2 is the column; 3 is the lower roller assembly; 4 is the upper roller assembly; 41 is the mounting block; 42 is the upper roller; 43 is the mounting groove; 5 is the correction structure; 51 is the correction plate; 52 is the guide groove; 53 is the correction unit; 531 is the receiving groove; 54 is the correction block; 541 is the lubrication groove; 55 is the correction groove; 56 is the first elastic component; 561 is the piston cylinder; 5611 is the moving part; 5612 is the compression part; 562 is the piston head; 563 is the connecting rod; 564 is the deformation medium; and 57 is the second elastic component. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the accompanying drawings.

[0037] Reference Figure 1 This invention discloses a composite short-stress rolling mill with an axial misalignment and rapid correction structure, comprising a base plate 1, columns 2, a lower roll assembly 3, and an upper roll assembly 4. There are four columns 2, which are rectangularly distributed and fixedly installed on the base plate 1. The lower roll assembly 3 and the upper roll assembly 4 are both installed on the columns 2, with the upper roll assembly 4 installed directly above the lower roll assembly 3.

[0038] Reference Figures 1 to 3 The upper roller assembly 4 includes two mounting blocks 41 disposed on the upper part of the column 2 and an upper roller 42 disposed between the two mounting blocks 41. The upper roller 42 is rotatably connected to the two mounting blocks 41 respectively. Each of the two mounting blocks 41 has a mounting groove 43 on its opposite side, and a correction structure 5 is disposed within the mounting groove 43. The correction structure 5 includes a correction plate 51 installed within the mounting groove 43. Both ends of the correction plate 51 abut against the bottom of the mounting groove 43, and both sides of the correction plate 51 abut against the sidewalls of the mounting groove 43. A guide groove 52 with clearance fit to the circumferential surface of the upper roller 42 is provided at the bottom of the correction plate 51.

[0039] The correction plate 51 includes at least two cooperating correction units 53. In this embodiment, the number of correction units 53 is three. A correction block 54 is disposed within the guide groove 52 along the rotation direction of the upper roller 42. A correction groove 55 is formed on the circumferential surface of the upper roller 42, and the correction block 54 is embedded within the correction groove 55. Each correction unit 53 corresponds to at least one correction block 54 and one correction groove 55. In this embodiment, each correction unit 53 corresponds to one correction block 54 and one correction groove 55.

[0040] Reference Figures 3 to 5Each adjacent correction unit 53 is provided with a first elastic component 56, which includes a piston cylinder 561 and a piston head 562 embedded in the piston cylinder 561. The piston head 562 and the piston cylinder 561 are slidably and closedly connected, forming a closed space between them. The two piston heads 562 are connected by a connecting rod 563. A deformation medium 564 is filled between the bottom of the piston cylinder 561 and the piston head 562. In this embodiment, the deformation medium 564 is hydraulic oil. Each adjacent correction unit 53 has a receiving groove 531 on its closest side. The piston cylinder 561 is installed in the receiving groove 531 and threadedly connected to it.

[0041] When the upper roll 42 undergoes a slight axial deformation during operation, the first elastic component 56 is compressed. Its rebound force is used to reset the slight deformation of the upper roll 42, reducing axial misalignment and extending its service life and stability. Because it consists of multiple correction units 53, correction blocks 54, and correction grooves 55, the axial deformation of each part of the upper roll 42 can be reduced, thereby improving the overall stability of the upper roll 42.

[0042] When the upper roll 42 undergoes elongation deformation, the piston head 562 moves from inside the piston cylinder 561 away from the bottom of the piston cylinder 561, thereby creating a negative pressure state between the piston head 562 and the piston cylinder 561. This creates a reaction force against the elongation deformation of the upper roll 42, and the reaction force increases with the increase of the deformation, preventing the upper roll 42 from continuing to elongate. At the same time, the reaction force promotes the restoration of the deformation of the upper roll 42.

[0043] When the upper roll 42 undergoes shortening deformation, the piston head 562 moves towards the bottom of the piston cylinder 561, thereby compressing the deformation medium 564 by the piston head 562 and the piston cylinder 561, thus forming a reaction force against the shortening deformation of the upper roll 42. As the deformation increases, the reaction force also increases, preventing the upper roll 42 from continuing to shorten. At the same time, under the action of the reaction force, the deformation of the upper roll 42 is restored.

[0044] The correction groove 55 has an arc-shaped radial section along the upper roller 42, and the correction block 54 is an arc-shaped component that fits snugly against the correction groove 55. The arc-shaped design of the correction groove 55 and the correction block 54 increases their contact area, thereby improving their stress resistance and reducing wear, thus enhancing the reliability of the correction structure 5.

[0045] The surface of the correction block 54 has multiple lubrication grooves 541 along the movement direction of the upper roller 42, and the lubrication grooves 541 are filled with lubricating oil. By opening the lubrication grooves 541 and filling them with lubricating oil, the friction between the correction block 54 and the correction groove 55 during relative movement is reduced, thus extending the service life of the correction structure 5.

[0046] The piston cylinder 561 includes a movable part 5611 and a compression part 5612, with the compression part 5612 located at the end of the piston cylinder 561 away from the piston head 562. In the direction perpendicular to the movement of the piston head 562, the cross-sectional area of ​​the compression part 5612 is smaller than the cross-sectional area of ​​the movable part 5611, and the cross-sectional area of ​​the compression part 5612 gradually decreases from the direction closer to the movable part 5611 to the direction farther away from the movable part 5611.

[0047] As the piston head 562 moves within the movable part 5611, the volume of the deformation medium 564 changes. Since the cross-sectional area of ​​the compression part 5612 is smaller than that of the movable part 5611, the pressure change within the piston head 562 and piston cylinder 561 is more pronounced, resulting in a greater reaction force and further improving the stability of the upper roll 42. As the moving distance of the piston head 562 increases, the pressure change within the piston head 562 and piston cylinder 561 is much greater than the change in the moving distance of the piston head 562, thus generating a greater reaction force on the formation of the upper roll 42 and further improving the stability of the upper roll 42.

[0048] A second elastic component 57 is installed between the bottom of the correction plate 51 and the mounting groove 43. The second elastic component 57 has the same structure as the first elastic component 56, which will not be described in detail here.

[0049] When the upper roll 42 is axially misaligned, the second elastic component 57 is compressed, forming a certain buffer. At the same time, its rebound force is used to reduce the slight misalignment of the upper roll 42 on the one hand, and to reset the slight misalignment of the upper roll 42 on the other hand, thus extending the working life of the short stress mill of the correction structure 5 and further improving the stability of the short stress mill.

[0050] Working principle:

[0051] During operation, the upper and lower roll assemblies roll the material. During this process, a straightening plate is installed between two mounting blocks, with the straightening plate and the upper roll in close contact. The straightening blocks are embedded in the straightening grooves. When the upper roll tends to misalign during operation, generating axial misalignment force, the straightening blocks can limit the upper roll's movement through the straightening grooves. The left and right ends of the straightening plate abut against the mounting blocks, thereby limiting the rotation of the upper roll, preventing axial misalignment, and correcting the axial misalignment force, thus improving the stability of the short-stress rolling mill.

[0052] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A composite short-stress rolling mill with an axial misalignment rapid correction structure, characterized in that: The system includes a base plate (1), a column (2) mounted on the base plate (1), a lower roller assembly (3) mounted on the column (2), and an upper roller assembly (4) mounted on the column (2) and located above the lower roller assembly (3). The upper roller assembly (4) is equipped with a correction structure (5). The upper roller assembly (4) includes two upper mounting blocks (41) mounted on the column (2) and an upper roller (42) rotatably connected to the upper mounting blocks (41). Mounting grooves (43) are provided on opposite sides of the two mounting blocks (41). The correction structure (5) includes a correction plate (51) installed in the mounting groove (43) and abutting against the bottom of the mounting groove (43). The correction plate (51) is slidably connected to the upper roller (42). A correction groove (55) is provided on the circumferential surface of the upper roller (42). The correction plate (51) is equipped with… A correction block (54) is embedded in the correction groove (55) and slidably connected to the correction groove (55); the correction plate (51) includes at least two cooperating correction units (53), each correction unit (53) corresponds to at least one correction block (54) and the corresponding correction groove (55), and a first elastic component (56) is provided between adjacent correction units (53); the first elastic component (56) includes piston cylinders (561) respectively provided on adjacent correction units (53), each piston cylinder (561) is embedded with a piston head (562), the piston head (562) and the piston cylinder (561) form a sealed space, a connecting rod (563) is provided between the two piston heads (562), and a deformation medium (564) is filled between the bottom of the piston cylinder (561) and the piston head (562).

2. A composite short-stress rolling mill with an axial misalignment rapid correction structure according to claim 1, characterized in that: A second elastic component (57) is installed between the bottom of the correction plate (51) and the mounting groove (43).

3. A composite short-stress rolling mill with an axial misalignment rapid correction structure according to claim 1, characterized in that: The piston cylinder (561) includes a movable part (5611) and a compression part (5612) away from the piston head (562). In the direction perpendicular to the movement of the piston head (562), the cross-sectional area of ​​the compression part (5612) is smaller than the cross-sectional area of ​​the movable part (5611).

4. A composite short-stress rolling mill with an axial misalignment rapid correction structure according to claim 3, characterized in that: The cross-sectional area of ​​the compression section (5612) gradually decreases from the direction close to the moving section (5611) to the direction away from the moving section (5611).

5. A composite short-stress rolling mill with an axial misalignment rapid correction structure according to claim 1, characterized in that: Each of the adjacent correction units (53) has a receiving groove (531) on the side that is close to each other to accommodate the piston cylinder (561).

6. A composite short-stress rolling mill with an axial misalignment rapid correction structure according to claim 1, characterized in that: The correction groove (55) has an arc-shaped radial section along the upper roller (42), and the correction block (54) is an arc-shaped part that fits into the correction groove (55).

7. A composite short-stress rolling mill with an axial misalignment rapid correction structure according to any one of claims 1 to 6, characterized in that: The surface of the correction block (54) is provided with a lubrication groove (541) along the movement direction of the upper roller (42), and the lubrication groove (541) is filled with lubricating oil.

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