fixed track at the entry and exit of the rolling mill and hot strip finishing mill

Abstract

The utility model provides a kind of fixed track of rolling mill entry and exit and hot-rolled plate strip finishing mill, including fixed track body, sliding plate and connecting piece.The cross section of fixed track body is special-shaped structure, and the contact surface of the cooling water device of lower work roll in rolling mill is adapted, can ensure the stable installation and reliable operation of track in rolling mill.A plurality of through holes are spaced apart in the length direction of fixed track body, both ensure the overall strength of track and reduce the weight of track itself.Sliding plate is set on the fixed track body, guides and supports work roll to make linear motion on the fixed track of rolling mill entry and exit, effectively improves the efficiency and accuracy of roll changing process.Connecting piece is provided in the through hole, realizes the detachable connection of sliding plate and the fixed track body, so that the replacement and overhaul of sliding plate are more convenient and fast, reduce maintenance cost, improve production efficiency.The utility model has simple structure design, convenient operation and low cost.

Description

Technical Field

[0001] This utility model relates to the field of hot-rolled strip steel production technology, and in particular to a fixed track for the inlet and outlet of a rolling mill and a hot-rolled strip finishing mill. Background Technology

[0002] In the finishing mills of hot-rolled strip mills, fixed inlet and outlet tracks are typically installed to enable rapid work roll changes. Slide plates are mounted on these tracks. The outlet slide plate is a smooth plate, while the inlet slide plate is a convex plate. These slide plates guide the work rolls in linear motion during roll changes, thereby improving roll change efficiency and accuracy to a certain extent.

[0003] However, existing fixed track and slide plate designs have many problems. The slide plate is constantly exposed to the harsh environment of high temperature, high humidity, and high dust within the rolling mill, making it prone to wear, corrosion, and deformation, significantly shortening its service life and increasing the failure rate. Slide plates are mostly connected to the fixed track using countersunk screws or welding, which greatly complicates replacement and maintenance in practical use. Not only is replacement and maintenance inefficient, but disassembly can also damage the mounting surface of the fixed track and the shape of the slide plate, affecting the running accuracy of the work rolls on the slide plate, severely impacting roll changing efficiency, and potentially causing the work rolls to fail to advance smoothly. In some cases, the slide plate may even detach due to abnormal stress, leading to equipment failure. Utility Model Content

[0004] The main purpose of this utility model is to provide a fixed track for the inlet and outlet of a rolling mill and a hot-rolled strip finishing mill, which solves the technical problems of low efficiency in slide replacement and maintenance and low efficiency in roll changing.

[0005] To achieve the above objectives, this utility model provides a fixed track for the inlet and outlet of a rolling mill, comprising: a fixed track body, a sliding plate, and a connecting member.

[0006] The fixed track body has an irregular cross-section to fit the contact surface of the cooling water device for the lower work roll inside the rolling mill; the fixed track body has multiple through holes spaced apart along its length.

[0007] The slide plate is mounted on the fixed track body to support the work roll in linear motion on the fixed track at the mill inlet and outlet.

[0008] The connector is inserted into the through hole and is used to detachably connect the slide plate to the fixed track body.

[0009] In some embodiments, the slide plate includes a convex slide plate disposed on the inlet side of the mill and / or a smooth plate disposed on the outlet side of the mill.

[0010] In some embodiments, the connector is an M12×120 hexagon socket head cap screw.

[0011] In some embodiments, the slide plate has bolt holes corresponding to the through holes of the fixed track body. The connector passes through the through holes of the fixed track body and the bolt holes of the slide plate in sequence, and cooperates with the matching nut to fasten the slide plate to the fixed track body.

[0012] In some embodiments, the nut is a lock nut adapted to the internal hexagon bolt, used to enhance the vibration resistance of the connection between the slide plate and the fixed track body.

[0013] In some embodiments, the area below the through hole on the fixed track body corresponding to the head of the connector is countersunk so that the head of the connector does not protrude from the mounting plane of the fixed track body after installation.

[0014] In some embodiments, the cross-section of the irregular structure is one of T-shaped, I-shaped, stepped, or rectangular.

[0015] The clearance between the cross-section of the irregular structure and the contact surface of the cooling water device for the lower working roller is 0.5 to 1.5 mm.

[0016] In some embodiments, the convex slide plate has a convex guide structure adapted to the guide path of the work roll at the mill inlet and outlet, and the roughness of the guide surface of the convex guide structure is ≤Ra3.2μm.

[0017] The upper surface of the smooth plate is a planar structure with a flatness error of ≤0.05mm / m, which is used to ensure the smoothness of the linear motion of the work roller.

[0018] In some embodiments, a buffer layer is provided between the skateboard and the fixed track body. The buffer layer is made of high-temperature resistant rubber and is used to reduce the vibration and impact of the skateboard during operation.

[0019] This utility model also provides a hot-rolled strip finishing mill, including the aforementioned fixed tracks at the mill inlet and outlet.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] The aforementioned utility model provides a fixed track for the inlet and outlet of a rolling mill and a hot-rolled strip finishing mill, including a fixed track body, a sliding plate, and connecting parts. The fixed track body has an irregular cross-section to adapt to the contact surface of the cooling water device for the lower work rolls inside the rolling mill, ensuring stable installation and reliable operation of the track within the mill and reducing the risk of failure due to structural mismatch. Multiple through holes are spaced along the length of the fixed track body, ensuring overall track strength while reducing the track's weight, facilitating installation and handling. The through-hole design also facilitates the installation of the connecting parts. The sliding plate is mounted on the fixed track body to guide and support the work rolls in linear motion on the fixed track at the inlet and outlet of the rolling mill, effectively improving the efficiency and accuracy of the roll changing process. The connecting parts pass through the through holes, enabling detachable connection between the convex and flat sliding plates and the fixed track body, making the replacement and maintenance of the sliding plates more convenient and faster, reducing maintenance costs, and improving production efficiency and equipment utilization.

[0022] This utility model has a simple structural design, is easy to operate, and has low cost. It can significantly improve the efficiency of slide plate maintenance and rolling mill operation, and solve the technical problems of low slide plate replacement and maintenance efficiency and low roll changing efficiency. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a front view of the fixed tracks at the inlet and outlet of the rolling mill according to the present invention; wherein, (a) is the fixed track at the inlet of the rolling mill; and (b) is the fixed track at the outlet of the rolling mill.

[0025] Figure 2 This is a top view of the fixed tracks at the inlet and outlet of the rolling mill according to the present invention; wherein, (a) is the fixed track at the inlet of the rolling mill; and (b) is the fixed track at the outlet of the rolling mill.

[0026] Figure 3 This is a cross-sectional view of the fixed track at the inlet and outlet of the rolling mill according to this utility model.

[0027] The attached figures are labeled as follows: 10, fixed track body; 11, slide plate; 12, through hole; 13, rolling mill; 14, bolt hole on the rolling mill stand; 15, cross-section of the irregular structure; 21, convex slide plate; 22, smooth plate.

[0028] The implementation, functional features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0031] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0032] The embodiments of this utility model provide a fixed track for the inlet and outlet of a rolling mill and a hot-rolled strip finishing mill, which solves the technical problems of low efficiency in slide replacement and maintenance and low efficiency in roll changing.

[0033] See Figures 1-3 , Figure 1 This is a front view of the fixed track at the inlet and outlet of the rolling mill according to this utility model; wherein, Figure 1 (a) Front view of the fixed track at the mill inlet; Figure 1 (b) is a front view of the fixed track at the mill exit; Figure 2 This is a top view of the fixed tracks at the inlet and outlet of the rolling mill according to this utility model; wherein, Figure 2 (a) is a top view of the fixed track at the mill inlet; Figure 2 (b) is a top view of the fixed track at the mill exit; Figure 3 This is a cross-sectional view of the fixed track at the inlet and outlet of a rolling mill according to the present invention. The present invention provides a fixed track at the inlet and outlet of a rolling mill, comprising: a fixed track body, a sliding plate, and connecting members.

[0034] To ensure the stable fixation of the track within the rolling mill, in some embodiments, the track body 10 has an irregular cross-section to accommodate the contact surface of the cooling water device for the lower work roll within the rolling mill 13. This ensures stable installation and reliable operation of the track within the rolling mill, reducing the risk of failure due to structural mismatch. It also effectively prevents cooling water leakage and ensures track stability under high temperature and high humidity conditions. The design of the track body also reduces vibration and misalignment of the work roll during movement, improving the stability of the rolling process and thus guaranteeing product quality. The track body 10 has multiple through holes 12 spaced along its length. The through hole design not only reduces the weight of the track body, facilitating installation and handling, but also provides convenience for the installation of connectors, making the connection between the slide plate and the track body more robust and reliable, and improving the maintainability of the equipment.

[0035] In order to fix the fixed rails at the inlet and outlet of the rolling mill to the rolling mill stand, in some embodiments, multiple bolt holes 14 on the rolling mill stand are pre-machined on the feed frame, which are adapted to the mounting holes on the fixed rail body to ensure the connection is firm and vibration-resistant.

[0036] Monitoring the wear of the track helps extend its service life. In some embodiments, a monitoring device is also provided on the fixed track body to monitor the wear of the slide plate and the movement status of the work roller in real time, so as to carry out maintenance and adjustment in a timely manner and further improve the operational reliability of the equipment.

[0037] The slide plate is used to support and guide the movement of the work roll. In some embodiments, the slide plate 11 includes a convex slide plate 21 disposed on the inlet side of the mill 13 and / or a smooth plate 22 disposed on the outlet side of the mill 13. The convex slide plate on the inlet side is convex in shape and is used to guide the work roll into the mill, ensuring the stability and accuracy of the work roll when entering the mill, thereby significantly improving the efficiency and accuracy of the roll changing process. The smooth plate on the outlet side is flat and is used to support the work roll to leave the mill smoothly, reducing vibration and offset caused by unevenness of the slide plate, further improving the roll changing efficiency. The slide plate 11 is disposed on the fixed track body 10, which provides support and positioning for the slide plate, ensuring that the slide plate remains stable during operation and supporting the work roll to move linearly on the fixed track at the inlet and outlet of the mill. This can significantly improve the efficiency and accuracy of the roll changing process and reduce the roll changing time extension and equipment failure caused by slide plate problems.

[0038] To extend service life, in some embodiments, the slide plate is made of wear-resistant material, enabling it to adapt to harsh environments such as high temperature and high humidity inside the rolling mill, and to withstand the friction and impact of the work rolls during movement, ensuring stable operation under various working conditions.

[0039] The detachable connection facilitates inspection and maintenance, reducing maintenance costs. In some embodiments, a connector passes through the through hole 12 to detachably connect the convex slide plate 21 and the flat slide plate 22 to the fixed track body 10. This makes slide plate replacement and maintenance more convenient and faster, improving the maintainability of the equipment.

[0040] The aforementioned utility model provides a fixed track for the inlet and outlet of a rolling mill, comprising a fixed track body, a sliding plate, and connecting components. The fixed track body has an irregular cross-section to adapt to the contact surface of the cooling water device for the lower work rolls within the rolling mill, ensuring stable installation and reliable operation of the track within the mill and reducing the risk of failure due to structural mismatch. Multiple through holes are spaced along the length of the fixed track body, ensuring overall track strength while reducing its weight, facilitating installation and handling. The through-hole design also facilitates the installation of the connecting components. The sliding plate, mounted on the fixed track body, guides and supports the work rolls in linear motion on the fixed track at the inlet and outlet of the rolling mill, effectively improving the efficiency and accuracy of the roll changing process. Connecting components pass through the through holes, enabling detachable connection between the convex and flat sliding plates and the fixed track body. This makes plate replacement and maintenance more convenient and faster, reducing maintenance costs and improving production efficiency and equipment utilization.

[0041] The connectors are adjusted and replaced as needed to ensure they are secure and easy to disassemble. In some embodiments, the connector is an M12×120 hex socket head cap screw. The M12×120 hex socket head cap screw has sufficient strength to ensure a secure connection between the slide plate and the fixed track body, maintaining stability even under the high-load operating environment of the rolling mill. The head design of the hex socket head cap screw effectively prevents the bolt from loosening due to vibration during operation, improving the operational reliability of the equipment. Furthermore, the design of the hex socket head cap screw facilitates quick disassembly and installation using tools, reducing downtime caused by slide plate replacement or maintenance and improving equipment maintenance efficiency.

[0042] The corresponding hole design facilitates the secure connection between the slide plate and the fixed track body. In some embodiments, bolt holes are provided on the slide plate 11 corresponding to the through holes 12 of the fixed track body 10. The connector passes through the through holes 12 of the fixed track body 10 and the bolt holes of the slide plate 11 in sequence, and engages with a suitable nut to secure the slide plate 11 to the fixed track body 10. The engagement of the nut and bolt ensures a firm and reliable connection between the slide plate and the fixed track body, maintaining stability even under high-load operating conditions. Tightening the nut effectively prevents the bolt from loosening due to vibration during operation, improving the operational reliability of the equipment. The engagement of the bolt and nut allows for quick installation and removal of the slide plate, improving maintenance efficiency.

[0043] To prevent the nut from loosening under high vibration conditions and ensure the connection between the slide plate and the fixed track body remains secure, in some embodiments, the nut is a lock-lock nut adapted to the hexagon socket head cap screw, used to enhance the vibration resistance of the connection between the slide plate 11 and the fixed track body 10. The lock-lock nut, through its special structural design, such as nylon inserts, spring washers, or double nuts, effectively prevents loosening under high vibration conditions. During installation, the hexagon socket head cap screw passes sequentially through the through hole of the fixed track body and the bolt hole of the slide plate, and then the lock-lock nut is tightened onto the end of the bolt, operating according to the specified torque value to ensure that the nut provides sufficient preload. This not only improves the vibration resistance of the connection but also reduces equipment failures caused by vibration, improving the reliability and stability of equipment operation. Simultaneously, the use of the lock-lock nut does not affect the quick disassembly and replacement of the slide plate, facilitating maintenance and repair, and reducing maintenance costs.

[0044] To ensure a flat surface after the connector is installed, in some embodiments, the area below the through hole 12 on the fixed track body 10 corresponding to the head of the connector is countersunk, so that the head of the connector does not protrude from the mounting plane of the fixed track body 10 after installation. The countersunk process creates a recessed plane, allowing the head of the connector (such as an M12×120 hex bolt) to be embedded within it. After installation, the head of the connector is flush with the mounting plane of the fixed track body, without protrusion. This not only ensures the flatness of the mounting plane and reduces interference problems caused by head protrusion, but also improves the overall stability and operational accuracy of the equipment. Simultaneously, it reduces wear caused by friction between the head and surrounding components, extending the service life of the connector and the fixed track body.

[0045] The cross-sectional shape can improve the structural strength and stability of the fixed track body, reducing vibration and misalignment under high-load operating conditions. In some embodiments, the cross-section 15 of the irregular structure is one of T-shape, I-shape, stepped shape, or rectangle. By selecting different cross-sectional shapes, different installation requirements and working environments can be met, improving the versatility and adaptability of the fixed track body. The fit clearance between the cross-section of the irregular structure and the contact surface of the lower working roller cooling water device is 0.5–1.5 mm. Controlling the fit clearance ensures a tight fit between the fixed track body and the cooling water device, while allowing for a certain degree of thermal expansion and installation error, reducing stress concentration caused by thermal expansion, extending the service life of the equipment, facilitating processing and manufacturing, and improving installation efficiency.

[0046] To ensure the smooth linear motion of the work roll, in some embodiments, the convex slide plate 21 has a convex guide structure adapted to the guide path of the work roll at the mill inlet and outlet. The roughness of the guide surface of the convex guide structure is ≤Ra3.2μm. This ensures a certain smoothness of the guide surface, reducing friction and wear of the work roll during the guide process.

[0047] The upper surface of the smoothing plate 22 is a planar structure with a flatness error of ≤0.05mm / m, which is used to ensure the smoothness of the linear motion of the work roller and reduce vibration and offset caused by mismatch of the guide path.

[0048] To reduce vibration and impact during skateboard operation, in some embodiments, a buffer layer made of high-temperature resistant rubber is provided between the skateboard 11 and the fixed track body 10. The buffer layer is installed between the skateboard and the fixed track body by adhesive bonding or mechanical fixing. The buffer layer is located at the bottom of the skateboard or the top of the fixed track body, ensuring that it will not shift or fall off during operation. The thickness of the buffer layer is not specifically limited and can be adjusted according to actual needs. The design of the buffer layer effectively absorbs and reduces vibration and impact during skateboard operation, improving the smoothness of the skateboard's operation. The high-temperature resistant rubber material has good elasticity and high-temperature resistance, maintaining its buffering function in high-temperature environments. Furthermore, the installation method of the buffer layer is simple, facilitating maintenance and replacement, reducing maintenance time and labor intensity, and improving production efficiency.

[0049] To extend the service life of the fixed track body, in some embodiments, the fixed track body 10 is made of high-strength alloy steel that is corrosion-resistant and wear-resistant. This allows the fixed track body to operate stably for extended periods in harsh environments such as high temperature, high humidity, and high dust levels within the rolling mill. The corrosion resistance of high-strength alloy steel reduces material damage caused by environmental factors, extending the track's service life. Its wear resistance reduces material wear caused by friction and impact from the work rolls. By using high-strength alloy steel, the fixed track body can withstand high loads, ensuring stability and reliability during rolling mill operation and reducing equipment failures due to insufficient material strength. This material selection not only improves the reliability of equipment operation but also reduces maintenance costs and increases production efficiency, demonstrating significant practical value and economic benefits.

[0050] This utility model also provides a hot-rolled strip finishing mill, including the aforementioned fixed tracks at the mill inlet and outlet.

[0051] In some embodiments, the hot-rolled strip finishing mill also includes a mill frame, transmission device, cooling system, etc., to ensure the normal operation of the rolling process. By optimizing the structure of the hot-rolled strip finishing mill, roll changing efficiency can be significantly improved, the stability and reliability of equipment operation can be enhanced, maintenance costs can be reduced, and production efficiency can be increased.

[0052] The aforementioned fixed track at the inlet and outlet of the rolling mill and the hot-rolled strip finishing mill include: a fixed track body, a sliding plate, and connecting components. The fixed track body has an irregular cross-section to adapt to the contact surface of the cooling water device for the lower work rolls within the rolling mill. This ensures stable installation and reliable operation of the track within the rolling mill, reducing the risk of failure due to structural mismatch. The fixed track body has multiple through holes spaced apart along its length. The through-hole design not only reduces the weight of the fixed track body, facilitating installation and transportation, but also provides convenience for the installation of connecting components, making the connection between the sliding plate and the fixed track body both robust and reliable, and easy to disassemble, thus improving the maintainability of the equipment. The sliding plate includes a convex sliding plate on the inlet side and a smooth plate on the outlet side. The convex sliding plate on the inlet side guides the work rolls into the rolling mill, ensuring the stability and accuracy of the work rolls when entering the rolling mill, thereby significantly improving the efficiency and precision of the roll changing process. The smooth plate on the outlet side supports the work rolls to smoothly leave the rolling mill, reducing vibration and offset caused by uneven sliding plate, further improving roll changing efficiency. The sliding plate is mounted on the fixed track body, which provides support and positioning for the sliding plate, ensuring its stability during operation and supporting the work rolls to move linearly along the fixed tracks at the mill inlet and outlet. This significantly improves the efficiency and accuracy of the roll changing process, reducing roll changing time and equipment failures caused by sliding plate issues. A connecting piece passes through the through hole, allowing for detachable connection between the convex and flat sliding plates and the fixed track body. This detachable connection makes sliding plate replacement and maintenance more convenient and faster, reducing maintenance costs and improving production efficiency and equipment utilization.

[0053] Moreover, this utility model has a simple structural design, is easy to operate, and has low cost. It can significantly improve the efficiency of slide plate maintenance and rolling mill operation, and solve the technical problems of low slide plate replacement and maintenance efficiency and low roll changing efficiency.

[0054] The above technical solutions of this utility model are merely preferred embodiments and do not limit the patent scope of this utility model. All equivalent structural transformations made under the technical concept of this utility model using the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this utility model.

Claims

1. A fixed track for the inlet and outlet of a rolling mill, characterized in that, include: The fixed track body (10) has an irregular cross-section to be adapted to the contact surface of the cooling water device for the lower working roll inside the rolling mill (13); the fixed track body (10) is provided with a plurality of through holes (12) spaced apart along its length. The slide plate (11) is set on the fixed track body (10) to support the work roll to move linearly on the fixed track at the inlet and outlet of the rolling mill; A connector is inserted into the through hole (12) for detachably connecting the slide plate (11) to the fixed track body (10).

2. The fixed track for the inlet and outlet of the rolling mill according to claim 1, characterized in that, The slide plate (11) includes a convex slide plate (21) disposed on the inlet side of the mill (13) and / or a smooth plate (22) disposed on the outlet side of the mill (13).

3. The fixed track for the inlet and outlet of the rolling mill according to claim 1, characterized in that, The connector is an M12×120 internal hex bolt.

4. The fixed track for the inlet and outlet of the rolling mill according to claim 1, characterized in that, Bolt holes are provided on the slide plate (11) corresponding to the through hole (12) of the fixed track body (10). The connector passes through the through hole (12) of the fixed track body (10) and the bolt hole of the slide plate (11) in sequence, and cooperates with the matching nut to fasten the slide plate (11) to the fixed track body (10).

5. The fixed track for the inlet and outlet of the rolling mill according to claim 4, characterized in that, The nut is a lock nut adapted to the internal hex bolt, used to enhance the vibration resistance of the connection between the slide plate (11) and the fixed track body (10).

6. The fixed track for the inlet and outlet of the rolling mill according to claim 1, characterized in that, The through hole (12) on the fixed track body (10) is countersunk below the position corresponding to the head of the connector, so that the head of the connector does not protrude from the mounting plane of the fixed track body (10) after installation.

7. The fixed track for the inlet and outlet of the rolling mill according to claim 1, characterized in that, The cross-section of the irregular structure is one of T-shaped, I-shaped, stepped, or rectangular. The clearance between the cross-section of the irregular structure and the contact surface of the cooling water device for the lower working roller is 0.5 to 1.5 mm.

8. The fixed track for the inlet and outlet of the rolling mill according to claim 1, characterized in that, The convex slide plate (21) has a convex guide structure that is adapted to the guide path of the work roll at the inlet and outlet of the rolling mill. The roughness of the guide surface of the convex guide structure is ≤Ra3.2μm. The upper surface of the smooth plate (22) is a planar structure with a flatness error of ≤0.05mm / m, which is used to ensure the smoothness of the linear motion of the working roller.

9. The fixed track for the inlet and outlet of the rolling mill according to claim 1, characterized in that, A buffer layer is also provided between the slide plate (11) and the fixed track body (10). The buffer layer is made of high temperature resistant rubber and is used to reduce the vibration and impact of the slide plate (11) during operation.

10. A hot-rolled strip finishing mill, characterized in that, Includes the fixed tracks at the mill inlet and outlet as described in any one of claims 1 to 9.

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