An auxiliary device for work roll change

Abstract

The utility model relates to a steel rolling equipment technical field, concretely relates to a kind of auxiliary device for work roll change roll, including frame body, clamping assembly being located on frame body and support frame being located on frame body;The clamping assembly includes upper clamp, lower clamp and power unit, and the lower clamp is fixedly connected with frame body, and the upper clamp is rotatably connected with frame body, and the power unit is used to drive upper clamp rotation relative to frame body;The support frame is located below clamping assembly, for supporting transmission roll.The auxiliary device of the utility model can effectively support and limit transmission roll when the connection of transmission roll and brush roll is disconnected, to prevent the axis position of transmission roll from deviating, and then new brush roll can be avoided to be damaged in the process of pushing back / pulling back.

Description

Technical Field

[0001] This utility model relates to the field of steel rolling equipment technology, and specifically to an auxiliary device for changing work rolls. Background Technology

[0002] The primary function of a four-high rolling mill is to change the thickness and shape of metal sheets through the rolling process. However, during prolonged continuous operation, the work rolls gradually increase in temperature due to the immense friction and rolling forces they endure. This temperature rise not only affects the material properties of the work rolls but also reduces the rolling quality of the strip, leading to issues such as surface roughness and decreased dimensional accuracy. Therefore, to ensure the rolling quality of the strip and extend the service life of the work rolls, they typically need to be replaced with new ones after a certain period of use.

[0003] In some large four-roll mills, in order to prevent scale and other impurities on the strip from adhering to the surface of the work roll during the rolling process, a brush roll is often installed on the feed side of the work roll. The brush on the brush roll cleans the surface of the work roll. However, since the work roll is often large and the surface of the brush roll needs to be in contact with the surface of the work roll during use, it would take a lot of time to replace the work roll separately. Therefore, in order to facilitate the replacement of the work roll, in actual scenarios, the work roll and the brush roll are often placed on a bearing housing for overall replacement.

[0004] However, in existing four-high mills, the power source transmits power to the brush roll via the drive roller. The drive roller and brush roll are connected by a universal coupling. During operation, both ends of the drive roller are connected to the power source and the brush roll respectively, providing support at both ends. When the brush roll needs to be replaced, it must first be pushed out / pulled out of the four-high mill, and then the connection between the brush roll and the drive roller must be disconnected. At this point, the end of the drive roller connected to the brush roll will be suspended due to the loss of support from the brush roll, causing the axis of the drive roller to shift. When the new brush roll is connected to the drive roller via the coupling, it needs to be pushed back / pulled back into the four-high mill. Because the axis of the drive roller has shifted, the axis of the new brush roll is difficult to align with the working axis of the brush roll in the four-high mill, leading to damage to the new brush roll during the pushing / pulling process and thus preventing effective cleaning of the working roll surface.

[0005] In real-world scenarios, to prevent the position of the drive roller from changing and thus avoid damage to the brush roller during the push-back / pull-back process, the operator needs to continuously support the drive roller after it is disconnected from the brush roller to ensure that its position remains relatively stable. However, this increases the difficulty of the operator's work. Summary of the Invention

[0006] This invention addresses the problem in existing technology where, during brush roller replacement, the connection between the drive roller and the brush roller is broken, leaving the drive roller suspended and causing a misalignment of its axis. This can easily damage the new brush roller during the push-back / pull-back process. The invention provides an auxiliary device for changing work rollers. This auxiliary device effectively supports and limits the drive roller when the connection between the drive roller and the brush roller is broken, preventing a misalignment of the drive roller's axis and thus avoiding damage to the new brush roller during the push-back / pull-back process.

[0007] To solve the above problems, the technical solution of this utility model is:

[0008] An auxiliary device for changing work rolls includes a frame, and further includes a clamping assembly and a support frame disposed on the frame;

[0009] The clamping assembly includes an upper clamp, a lower clamp, and a power unit. The lower clamp is fixedly connected to the frame, the upper clamp is rotatably connected to the frame, and the power unit is used to drive the upper clamp to rotate relative to the frame.

[0010] The support frame is located below the clamping assembly and is used to support the drive roller.

[0011] By adopting the above scheme, by simultaneously setting up a clamping assembly and a support frame, when the connection between the brush roller and the transmission roller is disconnected, the power unit that drives the clamping assembly can drive the upper clamp to rotate, thereby clamping the transmission roller through the upper and lower clamps, thus preventing the transmission roller from moving axially and preventing the position of the transmission roller from shifting in the left-right and vertical directions.

[0012] The drive roller is then supported by a support frame to prevent the entire weight of the drive roller from being borne by the lower clamp, thereby increasing the service life of the lower clamp and further preventing the vertical displacement of the drive roller. This ensures that the axis position of the drive roller remains stable throughout the entire roller changing process, thus avoiding damage to the new brush roller during the push-back / pull-back process.

[0013] Based on the above solution, the present invention can be further improved as follows:

[0014] Furthermore, the support frame includes a bracket mounted on the frame body and two detachable pads mounted on the top of the bracket, with the two pads respectively arranged on both sides of the lower clamp along the width direction of the lower clamp.

[0015] By adopting the above-mentioned further solution, two pads are respectively set on both sides of the lower clamp, so that a space is formed between the two pads to accommodate the lower clamp. This allows the pads on both sides of the lower clamp to support the drive roller when the lower clamp clamps it, thereby preventing the lower clamp from bearing the entire weight of the drive roller, reducing the stress on the lower clamp, and ensuring the service life of the lower clamp. Furthermore, the pads are detachably set on the top of the bracket, so that the support height of the support frame can be adjusted according to the installation height of the brush roller and the working height of the drive roller in different four-roll mills, thereby improving the versatility of the auxiliary roll changing device.

[0016] Furthermore, the top of the pad is an arc-shaped surface, which allows the pad to better fit against the surface of the transmission roller, thereby providing better support for the transmission roller.

[0017] Furthermore, the top of the bracket is provided with a sliding groove, and the bottom of the pad is provided with a slider that matches the sliding groove. The pad can be easily replaced through the cooperation of the sliding groove and the slider.

[0018] Furthermore, the sliders are respectively located on both sides of the pad, and the middle of the pad and the bracket are provided with a first connecting hole in the vertical direction. When the pad slides along the groove to the predetermined position, the first connecting holes on the pad and the bracket coincide in the vertical direction, and the pad and the bracket are fixed to each other by inserting fasteners in the first connecting holes, so that the pad can be fixed to the bracket by bolts or other connecting parts.

[0019] Furthermore, the support frame also includes a base located at the bottom of the support frame. The base is fixedly connected to the frame body, and the support frame is detachably connected to the base. This allows the support frame to be easily removed from the base and replaced when it is deformed or damaged due to repeated use over a long period of time, thereby avoiding damage to the connection between the frame body and the support frame and affecting the service life of the frame body.

[0020] Furthermore, the base includes a horizontal part and a vertical part, and the shape of the bottom of the bracket matches the horizontal part and the vertical part. The bottom of the horizontal part, the vertical part and the upper bracket are all provided with a second connecting hole. By setting the horizontal part and the vertical part, the left and right directions and the vertical direction of the bracket can be limited at the same time, so that the installation position of the bracket can be kept consistent.

[0021] Furthermore, the base is provided with limiting blocks at both the front and rear ends, and the top of the limiting blocks is higher than the top of the base. The limiting blocks can limit the front and rear directions of the bracket.

[0022] Furthermore, both the first connecting hole and the second connecting hole are threaded holes.

[0023] Furthermore, the power unit is a hydraulic cylinder.

[0024] The beneficial effects of this utility model through the above technical solution are as follows:

[0025] 1. In this utility model, when the connection between the brush roller and the drive roller is disconnected, the hydraulic cylinder driving the clamping assembly rotates the upper clamp, which in turn clamps the drive roller through the upper and lower clamps, thereby preventing axial movement of the drive roller and preventing displacement of the drive roller in the left-right and vertical directions. Furthermore, the support frame supports the drive roller, preventing the entire weight of the drive roller from being borne by the lower clamp. This not only reduces the force on the lower clamp, thereby increasing its service life, but also ensures the stability of the clamping assembly in holding the drive roller, thus ensuring the stability of the drive roller's axial position throughout the entire roller changing process.

[0026] 2. In this utility model, the support frame includes a bracket and a detachable pad block disposed above the bracket, so that the support height of the support frame can be adjusted by replacing different pad blocks, thereby enabling the support height of the support frame to be adjusted according to the installation height of the brush roll and the working height of the drive roll in different four-roll mills.

[0027] 3. In this utility model, the support frame also includes a detachable base located below the bracket, and the bracket is fixedly connected to the frame body through the base. This means that when the bracket is deformed or damaged due to repeated use over a long period of time, only the bracket needs to be replaced, without replacing the base. This avoids damage to the frame body caused by multiple bracket replacements, which could affect the installation accuracy of the bracket in the future. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model;

[0029] Figure 2 This is one of the structural schematic diagrams of the support frame in this utility model;

[0030] Figure 3 This is the second structural schematic diagram of the support frame in this utility model.

[0031] The attached diagram is labeled as follows: 1. Frame;

[0032] 2. Clamping assembly, 201. Upper clamp, 202. Lower clamp, 203. Power unit;

[0033] 3. Support frame, 301. Bracket, 302. Pad, 3021. First connecting hole, 303. Base, 3031. Horizontal part, 3032. Vertical part, 3033. Second connecting hole, 3034. Limiting block;

[0034] 4. Drive roller. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0036] like Figure 1 As shown, an auxiliary device for changing work rolls includes a frame 1, a clamping assembly 2 disposed on the frame 1, and a support frame 3 disposed on the frame 1.

[0037] The clamping assembly 2 includes an upper clamp 201, a lower clamp 202, and a power unit 203. The lower end of the upper clamp 201 and the upper end of the lower clamp 202 are both arc-shaped. The power unit 203 is a hydraulic cylinder. The hydraulic cylinder is connected to a hydraulic pump through a pipeline to control the extension and retraction of the piston end. The lower clamp 202 is fixedly connected to the frame 1, and the upper clamp 201 is rotatably connected to the frame 1. The hydraulic cylinder is used to drive the upper clamp 201 to rotate relative to the frame 1. When the hydraulic cylinder drives the upper clamp 201 to rotate to the clamping transmission roller 4, the cross-sections of the upper clamp 201 and the lower clamp 202 are inverted C-shaped.

[0038] The support frame 3 is located below the clamping assembly 2 and is used to support the transmission roller 4.

[0039] In this embodiment, the clamping assembly 2 is connected to the frame 1 via a connecting arm. The connecting arm is a rod or a square body. The left side of the connecting arm is fixedly connected to the lower clamp 202 and rotatably connected to the upper clamp 201. The right side of the connecting arm is fixedly connected to the frame 1 via a support frame, so that the upper clamp 201 and the lower clamp 202 are located above the frame 1. The cylinder body of the hydraulic cylinder is fixedly connected to the connecting arm, and the piston end of the hydraulic cylinder is rotatably connected to the upper part of the upper clamp 201, so that the piston end of the hydraulic cylinder can drive the upper clamp 201 to move when it extends and retracts, thereby realizing the clamping and releasing of the transmission roller 4.

[0040] The support frame 3 is located between the upper clamp 201 and the lower clamp 202 and the frame 1, and is located directly below the upper clamp 201 and the lower clamp 202.

[0041] In this embodiment, when the connection between the brush roller and the drive roller 4 is disconnected, the hydraulic cylinder driving the clamping assembly 2 can drive the upper clamp 201 to rotate, thereby clamping the drive roller 4 through the upper clamp 201 and the lower clamp 202. This prevents the drive roller 4 from moving axially and prevents the position of the drive roller 4 from shifting in the left-right and vertical directions. Furthermore, the support frame 3 supports the drive roller 4, preventing the entire weight of the drive roller 4 from being borne by the lower clamp 202. This not only reduces the force on the lower clamp 202 and increases its service life, but also further prevents the position of the drive roller 4 from shifting in the vertical direction and ensures the stability of the clamping assembly 2 in clamping the drive roller 4. This ensures that the position of the drive roller 4 remains stable throughout the entire roller changing process.

[0042] As one possible implementation method, such as Figure 2 and Figure 3 As shown, the support frame 3 includes a bracket 301 mounted on the frame body 1 and two pads 302 detachably mounted on the top of the bracket 301. The top of the pads 302 is an arc-shaped surface. The two pads 302 are symmetrically arranged on both sides of the lower clamp 202 along the width direction of the lower clamp 202. The distance between the two pads 302 is greater than or equal to the width of the lower clamp 202.

[0043] In this embodiment, a space for accommodating the lower clamp 202 can be formed between the two pads 302, so that when the lower clamp 202 clamps the drive roller, the pads 302 on both sides of the lower clamp 202 can support the drive roller 4, thereby preventing the entire weight of the drive roller 4 from being borne by the lower clamp 202; and the pads 302 are detachably set on the top of the bracket 301, so that the support height of the support frame 3 can be adjusted according to the installation height of the brush roller and the working height of the drive roller 4 in different four-roll mills.

[0044] In one possible implementation, the top of the bracket 301 is provided with four sliding grooves along the left and right directions, and the sliding grooves only penetrate the right side of the bracket 301. Two sliding grooves are symmetrically distributed on the front and rear sides of the top of the bracket 301. The bottom of each pad 302 is provided with a slider that matches the sliding groove on the corresponding side. The middle part of the pad 302 and the bracket 301 are provided with a first connecting hole 3021 along the vertical direction. The first connecting hole 3021 is a threaded hole. When the pad 302 slides along the sliding groove to the limit position, the first connecting hole 3021 on the pad 302 and the bracket 301 coincide in the vertical direction. The pad 302 and the bracket 301 are fixed to each other by fasteners inserted in the first connecting hole 3021. The fasteners are threaded connectors such as bolts.

[0045] As one possible implementation, the support frame 3 further includes a base 303 disposed at the bottom of the bracket 301. The base 303 includes a horizontal part 3031 and a vertical part 3032, and is fixedly connected to the frame 1. The shape of the bottom of the bracket 301 matches the horizontal part 3031 and the vertical part 3032, and is detachably connected to the base 303. The bottom of the horizontal part 3031, the vertical part 3032 and the upper bracket 301 are all provided with a second connecting hole 3033, which is a threaded hole.

[0046] In this embodiment, by setting a base 303 between the bracket 301 and the frame 1, when the bracket 301 is deformed or damaged due to repeated use over a long period of time, only the bracket 301 needs to be replaced, without the need to replace the base 303. This avoids damage to the frame 1 caused by replacing the bracket 301 multiple times, which would affect the installation accuracy of the subsequent bracket 301 and thus affect the support stability of the transmission roller.

[0047] As one possible implementation, the front and rear ends of the horizontal part 3031 are flush with the front and rear ends of the frame 1. Limiting blocks 3034 are respectively provided on the front and rear sides of the horizontal part 3031. The top of the limiting block 3034 is higher than the top of the horizontal part 3031, thereby limiting the front and rear direction of the bracket 301 and further ensuring the installation accuracy of the bracket 301.

[0048] In this embodiment, when used:

[0049] First, fix the base 303 to the frame 1 (by welding or by using threaded fasteners such as bolts). Then, fit the bottom of the bracket 301 with the horizontal part 3031 and the vertical part 3032 of the base 303. Limit the bracket 301 by the limiting blocks 3034 on both sides of the horizontal part 3031 of the base 303, so that the bracket 301 and the second connecting hole 3033 on the horizontal part 3031 correspond to the vertical part 3032. Fix the bracket 301 to the base 303 by using threaded fasteners such as bolts, and complete the installation of the support frame 3.

[0050] After the work roll and brush roll are pushed out / pulled out of the four-roll mill, the clamping assembly 2 and the support frame 3 are moved to the vicinity of the right side of the drive roll 4 by moving the frame 1. According to the distance between the top of the support 301 and the drive roll 4, a pad 302 of appropriate height is selected. The pad 302 is slidably installed by aligning the slider at the bottom of the pad 302 with the groove at the top of the support 301. When the pad 302 slides to the limit position, the pad 302 is fixed to the support 301 by using threaded fasteners such as bolts inserted into the first connecting hole 3021 at the top of the support 301 and the middle of the pad 302.

[0051] By controlling the retraction of the piston end of the hydraulic cylinder, the upper clamp 201 of the clamping assembly 2 opens. Then, by pushing the frame 1, the transmission roller 4 is positioned between the upper clamp 201 and the lower clamp 202, and the surface of the transmission roller 4 contacts the arc-shaped surface at the top of the pad block 302. Then, by controlling the extension of the piston end of the hydraulic cylinder, the upper clamp 201 and the lower clamp 202 of the clamping assembly 2 clamp the transmission roller 4 (during the clamping process, slight changes in the position of the transmission roller are within acceptable limits), thereby achieving the support of the support frame 3 and the clamping assembly 2 for the transmission roller 4. After that, the connection between the brush roller and the transmission roller 4 is disconnected, and a new brush roller is connected to the transmission roller 4.

[0052] After the new brush roll is connected to the drive roll 4, first control the clamping assembly 2 to loosen the drive roll 4, then push the frame 1 away from the drive roll 4, and then the new work roll and brush roll can be pushed back / pulled back into the four-high mill, thus completing the work roll change.

[0053] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0054] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Any equivalent or equivalent modifications or substitutions to the technical solutions of the present invention without departing from the spirit of the present invention or the scope of disclosure shall fall within the protection scope of the present invention.

Claims

1. An auxiliary device for changing work rolls, comprising a frame (1), characterized in that, It also includes a clamping assembly (2) and a support frame (3) mounted on the frame (1). The clamping assembly (2) includes an upper clamp (201), a lower clamp (202) and a power unit (203). The lower clamp (202) is fixedly connected to the frame (1), the upper clamp (201) is rotatably connected to the frame (1), and the power unit (203) is used to drive the upper clamp (201) to rotate relative to the frame (1). The support frame (3) is located below the clamping assembly (2) and is used to support the drive roller (4).

2. The auxiliary device for changing work rolls according to claim 1, characterized in that, The support frame (3) includes a bracket (301) mounted on the frame body (1) and two pads (302) detachably mounted on the top of the bracket (301). The two pads (302) are respectively arranged on both sides of the lower clamp (202) along the width direction of the lower clamp (202).

3. The auxiliary device for changing work rolls according to claim 2, characterized in that, The top of the pad (302) is an arc-shaped surface.

4. The auxiliary device for changing work rolls according to claim 2, characterized in that, The top of the bracket (301) is provided with a sliding groove, and the bottom of the pad (302) is provided with a slider that matches the sliding groove.

5. The auxiliary device for changing work rolls according to claim 4, characterized in that, The sliders are respectively located on both sides of the pad (302). The middle part of the pad (302) and the bracket (301) are provided with a first connecting hole (3021) in the vertical direction. When the pad (302) slides along the groove to the predetermined position, the first connecting hole (3021) on the pad (302) and the bracket (301) coincide in the vertical direction. The pad (302) and the bracket (301) are fixed to each other by fasteners passing through the first connecting hole (3021).

6. The auxiliary device for changing work rolls according to any one of claims 2 to 5, characterized in that, The support frame (3) also includes a base (303) located at the bottom of the bracket (301). The base (303) is fixedly connected to the frame (1), and the bracket (301) and the base (303) are detachably connected.

7. The auxiliary device for changing work rolls according to claim 6, characterized in that, The base (303) includes a horizontal part (3031) and a vertical part (3032). The shape of the bottom of the bracket (301) matches the horizontal part (3031) and the vertical part (3032). The bottom of the horizontal part (3031), the vertical part (3032) and the bracket (301) are all provided with a second connecting hole (3033).

8. The auxiliary device for changing work rolls according to claim 6, characterized in that, The base (303) has a limiting block (3034) at both the front and rear ends, and the top of the limiting block (3034) is higher than the top of the base (303).

9. The auxiliary device for changing work rolls according to claim 7, characterized in that, Both the first connecting hole (3021) and the second connecting hole (3033) are threaded holes.

10. The auxiliary device for changing work rolls according to claim 8, characterized in that, The power unit (203) is a hydraulic cylinder.

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