Plate mill roll changing device and working method thereof

Abstract

The invention is applicable to the technical field of rolling trigger roller replacement, and particularly relates to a plate mill roller replacement device and a working method thereof, the plate mill roller replacement device comprises a rolling trigger rack, a hydraulic lifting rod is mounted on the surface of the rolling trigger rack, and a connector is arranged at one end of the hydraulic lifting rod; a mounting seat is arranged on the side face of the rolling trigger rack, a plurality of supporting frames are arranged on the surface of the mounting seat, a roller changing platform is arranged on the surfaces of the supporting frames jointly, a roller changing vehicle body is arranged on the surface of the roller changing platform, and a plurality of first wheels are mounted on the surface of the roller changing vehicle body. The automatic roller replacing device has the following beneficial effects that firstly, the roller replacing process is highly automatic, manual operation is greatly reduced through cooperation of the hydraulic push-pull rod and the hydraulic lifting rod, and efficiency is improved; and secondly, the safety of the operation process is guaranteed through the design of the device, lifting and moving are controlled through hydraulic pressure, and accidents possibly occurring in the manual carrying process are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of roller changing of a rolling mill, in particular to a roller changing device of a plate rolling mill and a working method thereof. Background Art

[0002] During the production process of the plate rolling mill, the quality of the roll surface is easily affected due to the direct contact between the roll and the hot-rolled plate. Problems such as wear, oxidation, and deformation on the roll surface will directly affect the quality of the rolled plate. Therefore, regular inspection of the roll surface quality and timely replacement of unqualified rolls are the core of the daily maintenance work of the plate rolling mill. However, the roll replacement process involves the disassembly and assembly of large equipment, especially in the rolling of composite plates commonly used in the explosive welding process, the stability and surface accuracy of the roll are higher, and the roll replacement operation is more complicated and time-consuming.

[0003] The roll changing process of a plate rolling mill in the prior art usually relies on manual operation and involves multiple steps, including using lifting equipment to remove the old rolls, transporting the new rolls through special transportation equipment, and reinstalling them in the plate rolling mill. This traditional roll changing method is cumbersome and requires a long operation time due to the large size of the rolling mill and the heavy weight of the rolls (for example, in a 3800 rolling mill, the roll length can reach more than 6 meters), which directly affects the operating efficiency of the production line. At the same time, the complexity and repetitiveness of manual operation increase the labor intensity of workers and pose certain safety hazards, such as accidents such as the rolls may deviate or slip during removal or installation.

[0004] Based on the above problems, the technical defects of the traditional roll changing method are mainly reflected in the following aspects: First, the degree of automation is low and it relies heavily on manual operations, which leads to time-consuming and low efficiency. Secondly, there are great safety risks in manual operations, especially in the handling and installation of heavy rolls, which are prone to accidents. Finally, the existing roll changing equipment has a complex structure, the maintenance cost of special transportation equipment and installation platforms is high, and the equipment reuse rate is low, which increases the cost of maintenance and replacement. Therefore, there is an urgent need for a device that can automatically, stably and efficiently complete the roll changing operation to solve the various deficiencies in traditional roll changing technology. . Summary of the invention

[0005] The purpose of the embodiments of the present invention is to provide a plate rolling mill roll changing device and a working method thereof, aiming to solve the technical problems mentioned in the background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A plate rolling mill roll changing device comprises a rolling mill frame, a hydraulic lifting rod is installed on the surface of the rolling mill frame, and a connector is arranged at one end of the hydraulic lifting rod;

[0008] A mounting seat is arranged on the side of the rolling trigger frame, a plurality of support frames are arranged on the surface of the mounting seat, and a roll changing platform is arranged on the surfaces of the plurality of support frames, a roll changing vehicle body is arranged on the surface of the roll changing platform, and a plurality of first wheels are installed on the surface of the roll changing vehicle body;

[0009] A hydraulic push-pull rod is installed on the surface of the mounting seat, and a connecting seat is arranged at one end of the hydraulic push-pull rod, and the surface of the connecting seat is connected to the body of the roll-changing vehicle.

[0010] Furthermore, a roller changing track matched with the first wheel is provided on the surface of the roller changing platform, and the width of the roller changing track is the same as the thickness of the first wheel.

[0011] Furthermore, the connecting seat and the body of the roll-changing vehicle are detachably connected together by means of threaded bolts.

[0012] Furthermore, a controller is installed on the surface of the mounting seat, and the controller is used to control the movement stroke and movement rate of the hydraulic push-pull rod.

[0013] A working method of a plate rolling mill roll changing device comprises the following steps:

[0014] Step S1: Clean and inspect the roll-changing platform and the roll-changing track on the surface of the roll-changing platform to ensure that there are no foreign objects on the surface of the roll-changing platform and inside the roll-changing track;

[0015] Step S2: Connect the connecting seat to the body of the roll-changing vehicle and ensure that there is no looseness between the two;

[0016] Step S3: The hydraulic push-pull rod is turned on by the controller, so that one end of the hydraulic push-pull rod drives the connecting seat and the roll-changing vehicle body to move, and the first wheel on the roll-changing vehicle body rolls inside the roll-changing track until the roll-changing vehicle body is sent to the preset roll-changing area;

[0017] Step S4: After the roll-changing vehicle arrives at the preset roll-changing area, the old roll is fixed to the connector and the connection between the two is ensured to be firm;

[0018] Step S5, opening the hydraulic lifting rod, the hydraulic lifting rod drives the connector and the old roll fixed with the connector to move downward until the old roll contacts the surface of the roll changing vehicle body, and then the connector and the old roll are disassembled, so that the old roll is freely placed on the surface of the roll changing vehicle body;

[0019] Step S6: Open the hydraulic push-pull rod again through the controller, so that the hydraulic push-pull rod drives the connecting seat and the roll-changing vehicle body to return to their original positions, and then move the old rolls on the roll-changing vehicle body away through the crane;

[0020] Step S7: placing new rolls on the roll-changing vehicle body by means of a crane, and transporting the roll-changing vehicle body and the new rolls to a preset roll-changing area by means of a hydraulic push-pull rod;

[0021] Step S8: The connector is fixedly connected to the new roll, and the hydraulic lifting rod is opened again to return the connector to its original position to complete the roll changing operation.

[0022] Furthermore, the preset roll-changing area means that when the roll-changing vehicle body is located in the area, it is just below the rolling mill rolls.

[0023] The present invention provides a plate rolling mill roll changing device and a working method thereof, which have the following beneficial effects:

[0024] First, the roll changing process is highly automated, relying on the cooperation of hydraulic push-pull rods and hydraulic lifting rods, which greatly reduces manual operation and improves efficiency. Secondly, the design of the device ensures the safety of the operation process. By hydraulically controlling the lifting and movement, accidents that may occur during manual handling are avoided. Furthermore, the stability of the device is very high. The combination of the roll changing car body and the roll changing track ensures the smooth movement of the rolls and reduces the risk of roll tilting or sliding. In addition, the device is highly reusable, and the roll changing car body, roll changing platform and other components can be used multiple times, reducing maintenance and replacement costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The present invention is a structural schematic diagram of a roll changing device for a plate rolling mill.

[0026] Figure 2 A roll changing device for a plate rolling mill Figure 1 Enlarged view of point A.

[0027] Figure 3 The present invention is a schematic structural diagram of another embodiment of a roll changing device for a plate rolling mill.

[0028] Figure 4 A roll changing device for a plate rolling mill Figure 3 Enlarged view of point B.

[0029] In the figure: 1. foundation; 2. rolling trigger frame; 3. connector; 4. hydraulic lifting rod; 5. rolling roller; 6. connecting seat; 7. hydraulic push-pull rod; 8. mounting seat; 9. supporting frame; 10. rolling plate; 11. first wheel; 12. rolling plate body; 13. bearing seat; 14. locking device; 15. second wheel; 16. mounting seat. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0032] like Figure 1 and Figure 2 As shown, a plate rolling mill roll changing device provided by an embodiment of the present invention comprises a rolling mill frame 2, a hydraulic lifting rod 4 is mounted on the surface of the rolling mill frame 2, and a connector 3 is arranged at one end of the hydraulic lifting rod 4. The connector 3 can be specifically a clamping hydraulic connector, which can firmly clamp the rolling roller 5 through hydraulic force to ensure that it remains stable and not easy to slide during the lifting and moving process.

[0033] A mounting seat 8 is provided on the side of the rolling machine frame 2, and the rolling machine frame 2 and the mounting seat 8 are both placed on the foundation 1. A plurality of support frames 9 are provided on the surface of the mounting seat 8, and a roll changing platform 10 is provided on the surfaces of the plurality of support frames 9, a roll changing vehicle body 12 is provided on the surface of the roll changing platform 10, and a plurality of first wheels 11 are installed on the surface of the roll changing vehicle body 12.

[0034] A hydraulic push-pull rod 7 is mounted on the surface of the mounting seat 8, and a connecting seat 6 is provided at one end of the hydraulic push-pull rod 7, and the surface of the connecting seat 6 is connected to the roll-changing vehicle body 12. A controller is mounted on the surface of the mounting seat 8, and the controller is used to control the movement stroke and movement rate of the hydraulic push-pull rod 7.

[0035] A crane is also provided near the mounting seat 8 on the foundation 1, and the crane is used to lift the old roll 5 or the new roll 5. Square bearing seats 13 are provided at both ends of the roll 5, and the roll 5 can be stably placed on the ground or the roll changing vehicle body 12 through the bearing seats 13.

[0036] The working method of the plate rolling mill roll changing device provided by the present invention specifically comprises the following steps:

[0037] Step S1: Clean and inspect the roller changing platform 10 and the roller changing track provided on the surface of the roller changing platform 10 to ensure that there are no foreign objects on the surface of the roller changing platform 10 and inside the roller changing track;

[0038] Step S2: Connect the connecting seat 6 and the roll-changing vehicle body 12 together, and ensure that there is no looseness between the two;

[0039] Step S3: The hydraulic push-pull rod 7 is turned on by the controller, so that one end of the hydraulic push-pull rod 7 drives the connecting seat 6 and the roll-changing vehicle body 12 to move, and the first wheel 11 on the roll-changing vehicle body 12 rolls inside the roll-changing track until the roll-changing vehicle body 12 is delivered to the preset roll-changing area;

[0040] Step S4: After the roll-changing vehicle body 12 arrives at the preset roll-changing area, the old roll 5 is fixed on the connector 3, and the connection between the two is ensured to be firm;

[0041] Step S5, opening the hydraulic lifting rod 4, the hydraulic lifting rod 4 drives the connector 3 and the old roll 5 fixed with the connector 3 to move downward until the old roll 5 contacts the surface of the roll changing vehicle body 12, and then the connector 3 and the old roll 5 are disassembled, so that the old roll 5 is freely placed on the surface of the roll changing vehicle body 12;

[0042] Step S6: Open the hydraulic push-pull rod 7 again through the controller, so that the hydraulic push-pull rod 7 drives the connecting seat 6 and the roll-changing vehicle body 12 to return to their original positions, and then move the old roll 5 on the roll-changing vehicle body 12 away through the crane;

[0043] Step S7: placing the new roll 5 on the roll-changing vehicle body 12 by means of a crane, and transporting the roll-changing vehicle body 12 and the new roll 5 to a preset roll-changing area by means of a hydraulic push-pull rod 7;

[0044] Step S8: The connector 3 is fixedly connected to the new roll 5, and the hydraulic lifting rod 4 is opened again to return the connector 3 to its original position to complete the roll changing operation.

[0045] The preset roll-changing area means that when the roll-changing vehicle body 12 is located in the area, it is just below the rolls 5 .

[0046] In one embodiment of the present invention, the processing process of the plate mill roll changing device is divided into the following steps: First, clean and check the roll changing platform 10 and the roll changing track to ensure that there is no interference from foreign objects during the operation. Then, firmly connect the connecting seat 6 to the roll changing car body 12 to ensure that the movement of the hydraulic push-pull rod 7 can smoothly drive the roll changing car body 12. Next, control the hydraulic push-pull rod 7 through the controller to drive the roll changing car body 12 to move along the roll changing track until it reaches the preset roll changing area. In this area, the old roll 5 is connected to the hydraulic lifting rod 4 through the connector 3, and the old roll is stably placed on the roll changing car body 12 through the control of the hydraulic lifting rod 4.

[0047] After the roll-changing vehicle body 12 is loaded with the old roll, it is reset to the initial position by the hydraulic push-pull rod 7, and then the old roll is removed by the crane. After the crane places the new roll on the roll-changing vehicle body 12, the hydraulic push-pull rod 7 is started again to move the roll-changing vehicle body 12 to the preset roll-changing area. After the new roll is fixed by the connector 3, the hydraulic lifting rod 4 lifts it to the appropriate position to complete the roll-changing operation.

[0048] The device has the following advantages: First, the roll changing process is highly automated, relying on the cooperation of the hydraulic push-pull rod 7 and the hydraulic lifting rod 4, which greatly reduces manual operation and improves efficiency. Secondly, the design of the device ensures the safety of the operation process, and avoids accidents that may occur during manual handling through hydraulic control of lifting and movement. Furthermore, the stability of the device is very high. The combination of the roll changing car body 12 and the roll changing track ensures the smooth movement of the rolls and reduces the risk of the rolls tilting or sliding. In addition, the device has strong reusability, and components such as the roll changing car body 12 and the roll changing platform 10 can be used multiple times, reducing maintenance and replacement costs.

[0049] In this embodiment, a roller changing track matched with the first wheel 11 is provided on the surface of the roller changing platform 10 , and the width of the roller changing track is the same as the thickness of the first wheel 11 .

[0050] First, this design ensures the stable operation of the roll-changing vehicle body 12 on the roll-changing platform 10. The high matching of the track and wheel size can effectively prevent the vehicle body from shaking, deflecting or derailing during movement, ensuring that the vehicle body moves smoothly along the predetermined route. This is crucial for roll-changing operations, because the roller 5 is heavy, and any instability during the movement of the vehicle body may cause the roller to tilt or fall, affecting the safety of the operation.

[0051] Secondly, this design helps to improve positioning accuracy. When the roll-changing vehicle body 12 moves in the roll-changing track, the wheels and the track are closely matched, which can ensure that the vehicle body remains in the correct track center during the entire process. This precise positioning enables the roll-changing vehicle body 12 to accurately reach the preset roll-changing area, thereby ensuring that the roll 5 is exactly located at the specified working position, reducing errors and improving roll-changing efficiency.

[0052] In addition, the design of matching wheels to tracks also reduces wear on the equipment. Since the wheels can roll within the appropriate track width, the friction between the wheels and the track is reduced, which not only extends the service life of the equipment, but also reduces maintenance frequency and costs.

[0053] In summary, the design that the width of the roller changing track is the same as the thickness of the wheel not only improves the stability and positioning accuracy of the roller changing vehicle body 12, but also extends the life of the equipment and reduces maintenance costs, thereby further improving the reliability and safety of the overall system.

[0054] In this embodiment, the connecting seat 6 and the roll changing vehicle body 12 are detachably connected together by threaded bolt connection.

[0055] The threaded bolt connection provides a reliable and stable connection. This method can ensure a strong connection between the connecting seat 6 and the roll-changing vehicle body 12, especially when the roll-changing vehicle body 12 carries the rolls to move, it can effectively prevent the two from loosening or displacement, thereby ensuring the stability and safety of the structure during the entire roll-changing process.

[0056] Secondly, the detachable characteristics of the threaded bolts provide convenience for equipment maintenance. This connection method is easy to disassemble and reassemble. When it is necessary to overhaul the equipment, replace parts or adjust the system, the operator can quickly separate the connecting seat 6 from the roll-changing vehicle body 12, which simplifies the operation steps and saves time. Compared with fixed connection methods such as welding, threaded bolt connection is more flexible and easy to repair and maintain.

[0057] In addition, this connection method is also highly adaptable. When different roll-changing vehicle bodies 12 or connecting seats 6 need to be replaced or adjusted, the threaded bolt connection can provide flexibility to adapt to different equipment or structural requirements. Moreover, this connection method is easy to tighten or loosen, and can be disassembled and assembled with simple tools, which is convenient for daily operators.

[0058] like Figure 3 and Figure 4 As shown, in another embodiment of the present invention, a mounting seat 16 is provided on the original old roller 5 on the plate rolling mill frame 2, and a second wheel 15 is installed on the surface of the mounting seat 16. A guide track adapted to the second wheel 15 is provided on the surface of the mounting seat 8, so that the second wheel 15 can roll smoothly inside the guide track. A locking device 14 is installed at one end of the hydraulic push-pull rod 7, and the locking device 14 can be in the form of a locking clamp, and the shape of the locking device 14 is adapted to the shape of the end of the roller 5.

[0059] In this embodiment, when replacing a plurality of old rollers 5 on the plate rolling mill frame 2, the hydraulic lifting rod 4 and the connector 3 first lower the original old roller 5 so that it falls steadily on the mounting seat 8. At this time, the second wheel 15 on the roller 5 will be accurately inserted into the guide track on the mounting seat 8, so that the entire roller 5 can be used as a transport carrier to carry and transport the old or new roller 5.

[0060] When other old rollers 5 need to be replaced, these rollers can be placed on the original roller 5 through the hydraulic lifting rod 4 and the connector 3, that is, the bearing seats of other old rollers 5 are firmly placed on the bearing seats of the roller 5 with the second wheel 15. Then, the end of the roller 5 is locked with the locker 14, and the hydraulic push-pull rod 7 is started to drive the locker 14 and the roller 5 to move outward. At this time, the original roller 5 will roll smoothly in the guide rail through the second wheel 15, driving the other old rollers carried thereon to move together until the roller 5 is completely moved out.

[0061] Next, the old roll on the roll 5 is removed by a crane, and a new roll is placed on the roll 5 with the second wheel 15. Subsequently, the roll 5 and the new roll are reset to the specified position by the hydraulic push-pull rod 7, and are lifted and installed in the predetermined installation area by the hydraulic lifting rod 4 and the connector 3, completing the roll replacement operation.

[0062] Through the above technical solution, the design not only simplifies the handling and replacement process of the roller, but also improves the efficiency of the replacement operation. Through the matching of the second wheel 15 and the guide rail, the movement of the roller is smoother and more accurate, reducing the errors and safety hazards in manual operation. At the same time, the synergy of the hydraulic push-pull rod 7 and the locker 14 ensures the stability of the roller during transportation, effectively improving the automation level and safety of the system.

[0063] Compared with the previous solution of using a roll-changing vehicle body, this embodiment uses the roll 5 itself as a transport carrier and equips it with a second wheel 15 and a guide rail for movement. This design shows advantages and differences in many aspects.

[0064] First, the new solution simplifies the equipment structure. In the previous solution, the roll-changing vehicle body 12 is used as an independent load-bearing device to transport the rolls, while in the new solution, the old rolls 5 themselves are directly used as transport carriers, and are moved by the second wheels 15 thereon, avoiding the need for additional load-bearing devices. This reduces the complexity of the system and reduces the cost of manufacturing and maintenance.

[0065] Secondly, flexibility is significantly improved. The new solution allows roller 5 to be used not only for production, but also as a carrier for other rollers, simplifying the roller handling process and reducing unnecessary loading and unloading operations. This is particularly efficient when multiple rollers need to be replaced, saving time and reducing operational links.

[0066] The new solution is more excellent in terms of stability and safety. The precise matching of the second wheel 15 and the guide rail allows the rollers to move more smoothly, reducing the shaking or deviation that may be caused by the roller changing vehicle body. The use of the locker 14 can firmly lock the rollers to ensure that the rollers will not slide or shift during transportation, further improving the safety of the operation.

[0067] In addition, the maintenance requirements are also greatly reduced. In the previous solution, the friction and wear of the wheels and rail system of the roll-changing vehicle body were relatively frequent, requiring regular maintenance. In the new solution, the roll 5 itself serves as a carrier, reducing the total number of moving parts, reducing the maintenance frequency of the system, and saving the cost of repairing and replacing parts.

[0068] The new solution also improves the efficiency of roll changing. Since roll 5 can carry and transport other rolls, there is no need for frequent loading and unloading. The entire roll changing process becomes simpler and faster, significantly shortening the replacement time. In the previous solution, each roll change required additional operations with the help of the roll changing vehicle, which was relatively complicated and increased the roll changing time.

[0069] Finally, the new design no longer requires an additional roller-changing track system, and the combination of the guide track and the second wheel 15 replaces the previous roller-changing platform track system. This further reduces the infrastructure requirements, simplifies the system design, and also reduces the related construction and maintenance costs.

[0070] Overall, the new solution makes the entire roll changing process smoother and more efficient, and reduces the overall cost and complexity of the system by simplifying equipment, improving flexibility, reducing maintenance and improving operational efficiency.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A plate rolling mill roll changing device, comprising a rolling mill frame, characterized in that: A hydraulic lifting rod is installed on the surface of the trigger rolling machine frame, and a connector is provided at one end of the hydraulic lifting rod; A mounting seat is arranged on the side of the rolling trigger frame, a plurality of support frames are arranged on the surface of the mounting seat, and a roll changing platform is arranged on the surfaces of the plurality of support frames, a roll changing vehicle body is arranged on the surface of the roll changing platform, and a plurality of first wheels are installed on the surface of the roll changing vehicle body; A hydraulic push-pull rod is installed on the surface of the mounting seat, and a connecting seat is arranged at one end of the hydraulic push-pull rod, and the surface of the connecting seat is connected to the body of the roll-changing vehicle.

2. A plate rolling mill roll changing device according to claim 1, characterized in that: A roller changing track matched with the first wheel is provided on the surface of the roller changing platform, and the width of the roller changing track is the same as the thickness of the first wheel.

3. A plate rolling mill roll changing device according to claim 1, characterized in that: The connecting seat and the roller changing vehicle body are detachably connected together by threaded bolt connection.

4. A plate rolling mill roll changing device according to claim 1, characterized in that: A controller is installed on the surface of the mounting seat, and the controller is used to control the movement stroke and movement speed of the hydraulic push-pull rod.

5. A working method of a plate rolling mill roll changing device, characterized in that: The following steps are involved: Step S1: Clean and inspect the roll-changing platform and the roll-changing track on the surface of the roll-changing platform to ensure that there are no foreign objects on the surface of the roll-changing platform and inside the roll-changing track; Step S2: Connect the connecting seat to the body of the roll-changing vehicle and ensure that there is no looseness between the two; Step S3: The hydraulic push-pull rod is turned on by the controller, so that one end of the hydraulic push-pull rod drives the connecting seat and the roll-changing vehicle body to move, and the first wheel on the roll-changing vehicle body rolls inside the roll-changing track until the roll-changing vehicle body is sent to the preset roll-changing area; Step S4: After the roll-changing vehicle arrives at the preset roll-changing area, the old roll is fixed to the connector and the connection between the two is ensured to be firm; Step S5, opening the hydraulic lifting rod, the hydraulic lifting rod drives the connector and the old roll fixed with the connector to move downward until the old roll contacts the surface of the roll changing vehicle body, and then the connector and the old roll are disassembled, so that the old roll is freely placed on the surface of the roll changing vehicle body; Step S6: Open the hydraulic push-pull rod again through the controller, so that the hydraulic push-pull rod drives the connecting seat and the roll-changing vehicle body to return to their original positions, and then move the old rolls on the roll-changing vehicle body away through the crane; Step S7: placing new rolls on the roll-changing vehicle body by means of a crane, and transporting the roll-changing vehicle body and the new rolls to a preset roll-changing area by means of a hydraulic push-pull rod; Step S8: The connector is fixedly connected to the new roll, and the hydraulic lifting rod is opened again to return the connector to its original position to complete the roll changing operation.

6. A working method of a plate rolling mill roll changing device according to claim 5, characterized in that: The preset roll-changing area means that when the roll-changing vehicle body is located in the area, it is just below the rolling rolls.

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