A wide thin gauge steel strip rolling roll system adjusting device

Abstract

The application discloses a wide thin specification steel strip rolling roller system adjusting device, relates to the field of metal processing, and comprises a rolling mill frame, a roller assembly arranged on the rolling mill frame, and a hydraulic cylinder fixed on the rolling mill frame and used for applying a rolling force, and a screwdown fine adjustment mechanism is further arranged on the rolling mill frame and located on the rolling mill frame; through the "force shunting" design of the parallel connection of the elastic damping unit and the hydraulic cylinder, the active adjustment capability of the hydraulic cylinder to the roll gap position is maintained, the high-frequency dynamic impact vibration in the rolling process is effectively absorbed, and the problem that the existing rigid adjusting means cannot consider the roll gap adjustment and vibration absorption is solved; the elastic damping unit can be flexibly switched between the two states of participating in support and not participating in support through the lock unit, the same device can be adapted to different specification steel strips and different production conditions, diversified rolling requirements can be met without replacing equipment, and the universality and economy of the equipment are improved.

Description

Technical Field

[0001] This invention relates to the field of metal processing, and in particular to an adjustment device for wide-width, thin-gauge steel strip rolling mill rolls. Background Technology

[0002] In the rolling process of wide, thin steel strips, the thickness accuracy and shape quality of the strip directly determine the final product quality, while the positional accuracy and stress stability of the roll system are the core factors affecting these indicators. Existing roll system adjustment devices are mostly designed for conventional steel strips and lack sufficient adjustment accuracy for wide, thin steel strips. Furthermore, existing roll system pressing and fine-tuning mechanisms mostly achieve position adjustment directly through hydraulic drive or mechanical transmission.

[0003] For example, Chinese patent CN119387312A discloses a pressing device for a steel rolling mill, including a worm, a worm wheel, a moving hole, a pressing screw, and a roll system. In use, the worm drives the worm wheel to rotate. The worm wheel and the pressing screw are connected by a trapezoidal thread. The rotation of the worm wheel drives the pressing screw to move up and down. A spherical pad and a pressure block are installed below the pressing screw. The pressure block acts on the bearing seat of the rolling mill roll system to provide rolling force to the rolling mill.

[0004] However, the above-mentioned device still has some shortcomings in actual use: The aforementioned device uses a worm gear mechanism to drive the pressing screw to adjust the position of the roll system. This is a "rigid" adjustment method that does not buffer or offset the impact load on the roll system during rolling. It also cannot adaptively offset the position deviation caused by tension fluctuations and thermal deformation of the roll system during the rolling of wide and thin steel strips. It cannot achieve high-frequency vibration absorption while maintaining the ability to actively adjust the roll gap.

[0005] Therefore, based on the above-mentioned viewpoints, there is still room for improvement in the existing technical means for processing wide, thin steel strips. Summary of the Invention

[0006] To address the problem that existing technologies lack both active roll gap adjustment capability and dynamic absorption function in wide-width, thin-gauge steel strip rolling processes, this invention proposes a roll system adjustment device for wide-width, thin-gauge steel strip rolling. The device includes a mill stand, a roll assembly mounted on the mill stand, and a hydraulic cylinder fixed on the mill stand for applying rolling force. The mill stand also includes a pressure-down fine-tuning mechanism comprising: an elastic damping unit, connected in parallel with the hydraulic cylinder and acting on the bearing seat of the same support roll or work roll on the roll assembly; a preload adjustment unit, mounted on the mill stand and connected to the elastic damping unit, for adjusting the initial position of the elastic damping unit; and a locking unit, located between the hydraulic cylinder and the elastic damping unit, for switching the elastic damping unit between at least a first state of participation in support and a second state of non-participation in support.

[0007] Preferably, the preload adjustment unit includes mounting holes on the mill stand corresponding to the hydraulic cylinder and / or elastic damping unit, and a connector that slides through the mounting hole is fixedly connected to the bearing seat. The connector is coaxially and fixedly sleeved with the elastic damping unit.

[0008] Preferably, the connecting member is the piston rod of a hydraulic cylinder, and the elastic damping unit is coaxially sleeved on the piston rod.

[0009] Preferably, the connecting member is an adjusting rod parallel to the piston rod; The adjusting rod includes a connecting rod that slides through the mounting hole and is fixedly connected to the bearing seat. An adjusting screw is coaxially threaded onto the connecting rod, and an adjusting slide rod that slides out of the mounting hole is fixedly connected to the adjusting screw.

[0010] Preferably, the elastic damping unit comprises an elastic element and a first mating part and a second mating part fixed at both ends of the elastic element. The first mating part of the elastic element is slidably disposed in the mounting hole and slidably sleeved with the connector, and the second mating part is slidably disposed in the mounting hole and fixedly sleeved with the connector.

[0011] Preferably, the elastic element is a compression spring, a disc spring, or a rubber spring.

[0012] Preferably, the locking unit includes a rotating shaft and a limiting pressure plate installed on the mill stand. The limiting pressure plate is fixedly connected to the rotating shaft and is rotatably installed on the mill stand via the rotating shaft.

[0013] Preferably, the rotating shaft is a threaded rod threaded onto the machine frame.

[0014] Preferably, the thread of the threaded rod is a single-start small-pitch thread.

[0015] Compared with existing technologies, this application adopts a "force diversion" design that connects the elastic damping unit and the hydraulic cylinder in parallel. This design maintains the hydraulic cylinder's ability to actively adjust the roll gap position while effectively absorbing high-frequency dynamic impact vibrations during rolling. This solves the problem that existing rigid adjustment methods cannot simultaneously address roll gap adjustment and vibration absorption. Furthermore, the locking unit allows the elastic damping unit to flexibly switch between participating in support and not participating in support, enabling the same device to adapt to different specifications of steel strips and different production conditions. This allows for diverse rolling needs to be met without changing the equipment, improving the equipment's versatility and economy. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of the pressing fine-tuning mechanism of the present invention.

[0019] Figure 3 This is a schematic diagram of the structure of the elastic damping unit of the present invention.

[0020] Figure 4 This is the present invention. Figure 3 Enlarged view of point A in the middle.

[0021] Figure 5 This is a schematic diagram of another embodiment of the damping unit of the present invention.

[0022] Figure 6 This is a schematic diagram of the connector of the present invention.

[0023] Figure 7 This is a schematic diagram of the shock-absorbing spring of the present invention.

[0024] Figure 8 This is a schematic diagram of the friction part of the present invention.

[0025] In the diagram, 1 is the mill stand; 10 is the roll assembly; 11 is the hydraulic cylinder; 2 is the pressing fine-tuning mechanism; 20 is the elastic damping unit; 200 is the elastic element; 201 is the first mating part; 202 is the second mating part; 21 is the preload adjustment unit; 210 is the mounting hole; 211 is the connecting part; 2110 is the adjustable rod; 2111 is the connecting rod; 2112 is the adjusting screw; 2113 is the adjusting slide rod; 22 is the locking unit; 220 is the rotating shaft; 221 is the limiting pressure plate; 23 is the connecting part; 230 is the shock-absorbing spring; 231 is the mass sleeve; 232 is the guide rod; and 233 is the friction part. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1 To be continued Figure 8 The embodiments of the present invention will be described in detail below.

[0027] Example 1: Refer to Figures 1 to 2As shown, a wide-width, thin-gauge steel strip rolling mill roll system adjustment device includes a mill stand 1, a roll assembly 10 mounted on the mill stand 1, and a hydraulic cylinder 11 fixed on the mill stand 1 for applying rolling force. The mill stand 1 is also equipped with a pressing fine-tuning mechanism 2 located on the mill stand 1. The pressing fine-tuning mechanism 2 includes an elastic damping unit 20, a preload adjustment unit 21, and a locking unit 22. The elastic damping unit 20 and the hydraulic cylinder 11 are arranged in parallel and act together on the bearing seat of the same support roll or work roll on the roll assembly 10. The elastic damping unit 20 consists of an elastic element 200 and a first mating part 201 and a second mating part 202 fixed at both ends of the elastic element 200. The elastic element 200 is a compression spring, a disc spring, or a rubber spring. The attached figure shows an example of a compression spring and an example of a compression spring with its upper end fixedly connected to the first mating part 201 and its lower end fixedly connected to the second mating part 202.

[0028] The preload adjustment unit 21 is mounted on the mill stand 1 and connected to the elastic damping unit 20. Specifically, refer to... Figure 2 and Figure 3 As shown, the mill stand 1 has mounting holes 210 corresponding to the hydraulic cylinder 11 and / or the elastic damping unit 20. A connector 211 is fixedly connected to the bearing seat and slides through the mounting hole 210. The connector 211 is coaxially and fixedly sleeved with the elastic damping unit 20. The connector 211 can be the piston rod of the hydraulic cylinder 11 or an adjusting rod parallel to the piston rod. When an adjusting rod is used, the adjusting rod includes a connecting rod 2111 that slides through the mounting hole 210 and is fixedly connected to the bearing seat. An adjusting screw 2112 is coaxially threaded onto the connecting rod 2111. An adjusting slide rod 2113 that slides out of the mounting hole 210 is fixedly connected to the adjusting screw 2112. By rotating the adjusting slide bar 2113, the adjusting screw 2112 can be rotated synchronously. Through the thread action between the adjusting screw 2112 and the connecting rod 2111, the adjusting screw 2112 and the adjusting slide bar 2113 can be axially adjusted relative to the connecting rod 2111. This adjusts the initial position of the elastic damping unit 20 in the initial stage, so as to cooperate with the locking unit 22 to adjust the initial preload of the elastic damping unit 20.

[0029] Of course, in one feasible implementation, the adjusting rod can also be set as a telescopic rod, and its axial position can be adjusted by hydraulic drive control. Compared with threaded adjustment, it can further improve the adjustment accuracy and response speed, and adapt to the needs of automated rolling production.

[0030] Reference Figure 2 and Figure 3As shown, the locking unit 22 is located between the hydraulic cylinder 11 and the elastic damping unit 20. The locking unit 22 includes a rotating shaft 220 and a limiting pressure plate 221 provided on the mill stand 1. The limiting pressure plate 221 is fixedly connected to the rotating shaft 220 and is rotatably mounted on the mill stand 1 through the rotating shaft 220. When the elastic damping unit 20 is required to participate in support, the limiting pressure plate 221 and the rotating shaft 220 are rotated to press against the end face of the first mating part 201 or the second mating part 202. The elastic damping unit 20 is in the first state (participating in support) and can elastically float on the bearing seat. At this time, the hydraulic cylinder 11 and the elastic damping unit 20 jointly bear the rolling force. The hydraulic cylinder 11 and the elastic damping element are arranged in parallel on the same support path, forming a physical "force split" - the rolling force is jointly borne by the hydraulic cylinder 11 and the elastic damping element according to their respective stiffness ratios. The hydraulic cylinder 11 bears the steady-state and low-frequency components of the rolling force, ensuring the control accuracy and stability of the roll gap position; the elastic damping element bears the high-frequency dynamic impact component of the rolling force and absorbs the impact energy through elastic deformation. The elastic damping unit 20 can buffer the rolling process through its own elastic deformation. The vibration and impact generated during rolling, combined with the initial preload preset by the preload adjustment unit 21, offset the lateral movement of the rolling gap, preventing the roll system from shaking when rolling thin, wide steel strips, ensuring the thickness accuracy of the steel strip. The roll system is provided with rolling force only by the hydraulic cylinder 11, adapting to the rolling production needs of different specifications of steel strips. When the elastic damping unit 20 is not required to participate in the support, the limit plate 221 is rotated to move it away from the sliding path of the first mating part 201 or the second mating part 202, and the elastic damping unit 20 is in the second state (not participating in the support). The elastic element 200 can deform freely. At this time, the elastic damping unit 20 moves synchronously with the bearing seat along the rolling force direction and will not bear the rolling force. The roll system is provided with rolling force only by the hydraulic cylinder 11, adapting to the switching needs of different production conditions, and will not affect the normal rolling process of the steel strip.

[0031] It should be noted that, in order to facilitate locking the position of the adjusted limit plate 221, the rotating shaft 220 is provided as a threaded rod. The threaded rod is threaded through the mill stand 1. The self-locking characteristic of the threaded rod is used to fix the position of the limit plate 221 after rotation adjustment. At the same time, in order to avoid excessive axial sliding of the limit plate 221 by the threaded rod through the thread during the rotation adjustment process, the thread on the threaded rod is preferably a single-start small-pitch ordinary thread or a trapezoidal thread, which ensures the position adjustment accuracy of the limit plate 221 and can also improve the position stability after locking.

[0032] In addition, the design of the elastic damping unit 20 in the "first state of participating in support" and "second state of not participating in support" in this application is mainly to deal with the initial calibration after batch switching of different steel strip specifications or roll system replacement. The actual operation logic is as follows: the switching is completed before rolling or after steel throwing (that is, under no-load or no-load conditions), at which time the rolling mill system has no rolling force; if the switching is carried out under load conditions, the rolling mill speed also needs to be reduced to a low-speed state to minimize the possible impact risk.

[0033] To ensure the effectiveness of vibration absorption by the elastic damping unit 20, it is best to have several elastic damping units 20, which are evenly distributed on both sides of the hydraulic cylinder 11 along the steel strip conveying direction. The preload adjustment unit 21 and the locking unit 22 are arranged one-to-one with the elastic damping unit 20. Each elastic damping unit 20 can adjust its initial preload through the preload adjustment unit 21, which can buffer and offset the vibration of the bearing seat from multiple positions, avoid the problem of uneven local force aggravating the vibration of the roll system, further improve the stability of the roll system operation, and ensure the rolling thickness accuracy of wide and thin steel strips.

[0034] As an alternative implementation, unlike the above, the connecting member 211 in the preload adjustment unit 21 directly adopts the piston rod of the hydraulic cylinder 11, and the elastic damping unit 20 is coaxially sleeved on the piston rod and moves together with the piston rod.

[0035] Specifically, both the first mating part 201 and the second mating part 202 are penetrated by the piston rod. One of them is fixedly sleeved with the piston rod, while the other is slidably sleeved on the piston rod. The rotating shaft 220 and the limiting pressure plate 221 of the locking unit are arranged on both sides of the piston rod. Rotating the limiting pressure plate 221 and the rotating shaft 220 can cause the slidably sleeved first mating part 201 or second mating part 202 to be pressed and pre-tightened by the limiting pressure plate 221. The limiting pressure plate 221 applies a stable axial limit to the slidably sleeved first mating part 201 or second mating part 202. The piston rod is driven by the hydraulic cylinder 11 to drive the bearing seat to slide and adjust. When the elastic damping unit 20 is in position, it can be limited by the limiting pressure plate 221 and directly adjust the pre-pressure synchronously with the piston rod. This method has a more compact structure and does not require separate adjustment of the position of the elastic damping unit 20. It is suitable for situations where the installation space of the rolling mill stand 1 is limited, reducing the processing and modification cost of the device. In this implementation method, if it is necessary to adjust the pre-compression force of the elastic damping unit 20, it is only necessary to add or remove metal shims of different thicknesses in the mounting hole 210 to change the relative distance between the first mating part 201 and the second mating part 202, thereby changing the compression amount of the elastic damping unit 20.

[0036] Example 2: Refer to Figure 3 , Figure 7 and Figure 8 As shown, based on Embodiment 1, to improve the buffering and vibration damping effect, a connecting part 23 is fixedly connected to the upper end of the adjusting slide 2113. A damping spring 230 is connected to the connecting part 23, and a mass sleeve 231 is fixedly connected to the end of the damping spring 230 away from the connecting part 23. When the damping spring 230 is a single spring, its axial direction is the same as the axis of the elastic element 200. When several damping springs 230 are arranged circumferentially around the axis of the adjusting slide 2113, then... The axial direction of several damping springs 230 is parallel to the axis of the elastic element 200. The ends of several damping springs 230 away from the connecting part 23 are connected to the mass sleeve 231. A guide rod 232 is fixed on the adjusting slide rod 2113 and slides through the mass sleeve 231 to guide the damping springs 230 and the mass sleeve 231 to maintain relative axial sliding with respect to the adjusting slide rod 2113. A friction part 233 is provided at the guide hole through which the guide rod 232 passes in the mass sleeve 231. 233 is a friction ring fixed at the guide hole. The sliding friction between the friction ring and the guide rod 232 creates a damping effect on the sliding of the damping spring 230 and the mass sleeve 231. The damping spring 230, the mass sleeve 231 and the guide rod 232 form a dynamic vibration absorption unit. When the adjusting slide rod 2113 vibrates with the operation of the rolling mill, the elastic element 200, as the main vibration absorption component, absorbs the vibration energy of the roll or the rolling mill and transmits the residual vibration that is not completely absorbed to the dynamic vibration absorption unit, causing the dynamic vibration absorption unit to vibrate under pressure. The free end of the damping spring 230 and the mass sleeve 231 convert the mechanical energy transmitted from the elastic element 200 into the kinetic and potential energy of the damping spring 230 and the mass sleeve 231 themselves to form vibration. At the same time, the sliding friction between the friction ring and the guide rod 232 converts some of the mechanical energy into heat energy, further dissipating the energy into the surrounding environment, reducing the overall vibration amplitude of the roll system and improving the stability of the wide and thin steel strip rolling process.

[0037] Of course, to avoid the problem of jamming caused by excessive sliding friction resistance between the guide rod 232 and the friction ring, the friction part 233 can also be set as multiple ball grooves embedded in the inner wall of the guide hole. Each ball groove is fitted with a rolling ball, and the ball rolls in contact with the rod wall of the guide rod 232. While generating rolling friction to dissipate vibration energy, it avoids component jamming and ensures that the dynamic vibration absorption unit can continuously slide relative to the residual vibration and continuously absorb and dissipate energy.

[0038] During operation: First, based on the specifications of the rolled steel strip and the production conditions, it is determined whether the elastic damping unit 20 needs to be activated. If not, the locking unit 22 keeps the elastic damping unit 20 in the second state of not participating in support, relying solely on the hydraulic cylinder 11 to output stable rolling force to complete the conventional rolling operation. If rolling a wide, thin steel strip, it is necessary to buffer vibration and improve thickness accuracy. Then, the rotating shaft 220 drives the limiting pressure plate 221 to rotate to the preset position, pressing it against the corresponding mating end face of the elastic damping unit 20, allowing the elastic damping unit 20 to switch to the first state of participating in support. During the rolling process, the hydraulic cylinder 11 stably bears the steady-state and low-frequency components of the rolling force, ensuring the stability of the roll gap position. The elastic damping unit 20 absorbs the high-frequency dynamic impact components through its own elastic deformation, absorbing vibration impact energy. In conjunction with multiple evenly distributed elastic damping units 20, the vibration of the bearing seat is buffered and offset from multiple positions, avoiding roll system vibration, and ultimately ensuring the rolling thickness accuracy of the wide, thin steel strip, completing the rolling operation.

[0039] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and not restrictive.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A wide-width, thin-gauge steel strip rolling mill roll system adjustment device, comprising a mill stand (1), a roll assembly (10) disposed on the mill stand (1), and a hydraulic cylinder (11) fixed on the mill stand (1) for applying rolling force, characterized in that: The rolling mill stand (1) is also provided with a pressing fine adjustment mechanism (2), which includes: The elastic damping unit (20) is connected in parallel with the hydraulic cylinder (11) and acts on the bearing seat of the same support roll or work roll on the roll assembly (10); A preload adjustment unit (21) is installed on the mill stand (1) and connected to the elastic damping unit (20) to adjust the initial position of the elastic damping unit (20); A locking unit (22) is provided between the hydraulic cylinder (11) and the elastic damping unit (20) for switching the elastic damping unit (20) between at least a first state of participating in support and a second state of not participating in support.

2. The wide-width, thin-gauge steel strip rolling mill adjustment device according to claim 1, characterized in that: The preload adjustment unit (21) includes a mounting hole (210) on the mill stand (1) corresponding to the hydraulic cylinder (11) and / or the elastic damping unit (20). A connector (211) is fixedly connected to the bearing seat and slides through the mounting hole (210). The connector (211) is coaxially fixedly sleeved with the elastic damping unit (20).

3. The wide-width, thin-gauge steel strip rolling mill adjustment device according to claim 2, characterized in that: The connecting piece (211) is the piston rod of the hydraulic cylinder (11), and the elastic damping unit (20) is coaxially sleeved on the piston rod.

4. The wide-width, thin-gauge steel strip rolling mill adjustment device according to claim 2, characterized in that: The connecting member (211) is an adjusting rod that is parallel to the piston rod; The adjusting rod includes a connecting rod (2111) that slides through the mounting hole (210) and is fixedly connected to the bearing seat. An adjusting screw (2112) is coaxially threaded onto the connecting rod (2111), and an adjusting slide rod (2113) that slides through the mounting hole (210) is fixedly connected to the adjusting screw (2112).

5. The wide-width, thin-gauge steel strip rolling mill adjustment device according to claim 1, characterized in that: The elastic damping unit (20) consists of an elastic element (200) and a first mating part (201) and a second mating part (202) fixed at both ends of the elastic element (200). The first mating part (201) of the elastic element (200) is slidably disposed in the mounting hole (210) and slidably sleeved with the connector (211). The second mating part (202) is slidably disposed in the mounting hole (210) and fixedly sleeved with the connector (211).

6. The wide-width, thin-gauge steel strip rolling mill adjustment device according to claim 5, characterized in that: The elastic element (200) is a compression spring, a disc spring, or a rubber spring.

7. The wide-width, thin-gauge steel strip rolling mill adjustment device according to claim 1, characterized in that: The locking unit (22) includes a rotating shaft (220) and a limiting pressure plate (221) provided on the mill stand (1). The limiting pressure plate (221) is fixedly connected to the rotating shaft (220) and is rotatably installed on the mill stand (1) through the rotating shaft (220).

8. The wide-width, thin-gauge steel strip rolling mill adjustment device according to claim 7, characterized in that: The aforementioned rotating shaft (220) is a threaded rod with threads threaded through the machine frame.

9. The wide-width, thin-gauge steel strip rolling mill adjustment device according to claim 8, characterized in that: The thread of the threaded rod is a single-start small-pitch thread.

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