Powerful uncoiling device and method

Abstract

The powerful uncoiling device comprises an uncoiling machine, a first uncoiling guide plate, a second uncoiling guide plate, a steering roller, a rolling line roller and a pinch roller, a steel coil on the uncoiling machine is produced in a lower uncoiling mode, the first uncoiling guide plate is located at an outlet of the uncoiling machine, and the steering roller and the rolling line roller are located above the first uncoiling guide plate; the first uncoiling guide plate comprises a threading guide plate and a first swinging hydraulic cylinder for driving the threading guide plate to swing up and down; a pair of compression rollers is arranged at one end, close to the uncoiling machine, of the threading guide plate; the second uncoiling guide plate comprises a swinging guide plate and a second swinging hydraulic cylinder, a telescopic guide plate and a first telescopic hydraulic cylinder are arranged on the swinging guide plate, and a scraper knife is arranged at the front end of the telescopic guide plate; the pinch roll comprises a swing frame and a third swing hydraulic cylinder, a lifting frame and a first lifting hydraulic cylinder are arranged on the swing frame, and a transmission roll is arranged at the lower end of the lifting frame. The uncoiling and threading device can adapt to uncoiling and threading operation of steel coils of various specifications, operation is safe and reliable, and production efficiency is high.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of strip rolling and temper rolling, and particularly relates to a strong uncoiler and a method thereof, which is suitable for various rolling mills and temper mills. BACKGROUND

[0002] In cold rolling production, it is usually required to uncoil and thread a coil at the inlet of a mill train. For the top uncoiling production mode, an uncoiling guide plate or clamp device is generally arranged at the uncoiler to guide the strip head into the pinch roll for threading. However, for the bottom uncoiling production mode, the conventional clamp device cannot be applied to thick gauge (4 mm or more) high-strength steel coils; only through the uncoiling guide plate, the strip head is often tightly buckled on the coil, which is difficult to be smoothly uncoiled, resulting in threading failure. At this time, only manual forced uncoiling can be relied on, which not only reduces the production efficiency, but also easily causes production accidents. SUMMARY

[0003] The present application aims to provide a strong uncoiling device to solve the above technical problems.

[0004] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows: a strong uncoiling device, which is arranged at the inlet area of a rolling mill or a temper mill train, comprises an uncoiler, a first uncoiling guide plate, a second uncoiling guide plate, a deflection roll, a rolling line roll and a pinch roll, the steel coil on the uncoiler is produced in a bottom uncoiling mode, the first uncoiling guide plate is located at the outlet of the uncoiler, the deflection roll and the rolling line roll are located above the first uncoiling guide plate and are arranged in sequence along the uncoiling direction of the strip, the second uncoiling guide plate is located above the uncoiler, and the pinch roll is located above the deflection roll. The first uncoiling guide plate comprises a threading guide plate and a first swing hydraulic cylinder for driving the threading guide plate to swing up and down, the threading guide plate is provided with a pair of press rolls at one end close to the uncoiler, and the threading guide plate is pivoted at the axial center line of the deflection roll and is driven by the first swing hydraulic cylinder to swing the press rolls up and down. The second uncoiling guide plate comprises a swing guide plate and a second swing hydraulic cylinder for driving the swing guide plate to swing up and down, the swing guide plate is provided with an extension guide plate and a first extension hydraulic cylinder for driving the extension guide plate to slide forward and backward, and the front end of the extension guide plate is provided with a spade. The pinch roll comprises a swing frame and a third swing hydraulic cylinder for driving the swing frame to swing left and right, the swing frame is provided with a lifting frame and a first lifting hydraulic cylinder for driving the lifting frame to move up and down, and the lower end of the lifting frame is provided with a transmission roll. The first swing hydraulic cylinder and the first lifting hydraulic cylinder are both provided with pressure detection devices.

[0005] Preferably, the press rolls are rubber-coated rolls.

[0006] Preferably, a first sliding groove is arranged on the swing guide plate along the front-rear direction, and the telescopic guide plate is arranged on the first sliding groove to slide forward and backward.

[0007] Preferably, a second sliding groove is arranged on the swing frame along the up-down direction, and the lifting frame is arranged on the second sliding groove to slide up and down.

[0008] Preferably, the shovel is a high-strength hard steel shovel.

[0009] Preferably, the turning roller and the rolling line roller are steel rollers.

[0010] Preferably, the transmission roller is a rubber-covered roller, and the transmission roller is connected with a rotary driving member for driving the rotation of the transmission roller.

[0011] Preferably, the rotary driving member is an electric motor or a hydraulic motor.

[0012] The application also provides a strong uncoiling method using the strong uncoiling device. Step one: the steel coil is transported to the uncoiler, and the head of the belt is initially located at the 7-8 o'clock direction below the drum of the uncoiler; Step two: the first swing hydraulic cylinder drives the belt passing guide plate to swing upward, and the belt head is pressed by the pressure roller until the pressure set by the pressure detection device on the first swing hydraulic cylinder is reached, and the pressure is continuously maintained; Step three: the uncoiler rotates in the direction of the belt expansion until the belt head is located at the 11 o'clock direction above the drum of the uncoiler; Step four: according to the diameter of the steel coil, the second swing hydraulic cylinder drives the swing guide plate to swing downward until the shovel swings to the position below the belt head; Step five: the first telescopic hydraulic cylinder drives the telescopic guide plate to extend forward, the belt head is lifted by the shovel to make the belt head separate from the steel coil; at the same time, the uncoiler continues to rotate in the direction of the belt expansion, and the belt head is guided into the upper side of the turning roller through the cooperation of the second uncoiling guide plate; Step six: the third swing hydraulic cylinder drives the swing frame to swing toward the uncoiler, and the first lifting hydraulic cylinder drives the lifting frame to move downward to adjust the height of the lifting frame, thereby driving the transmission roller to move downward, the belt head is pressed on the turning roller through the transmission roller until the pressure set by the pressure detection device on the first lifting hydraulic cylinder is reached, and the transmission roller stops moving downward and continuously maintains the pressure; Step seven: the uncoiler and the transmission roller rotate synchronously in the direction of the belt expansion until the belt head crawls to the upper side of the rolling line roller; Step eight: the third swing hydraulic cylinder drives the swing frame to swing away from the uncoiler, and the first lifting hydraulic cylinder drives the lifting frame to continue moving downward to adjust the height of the lifting frame, thereby driving the transmission roller to continue moving downward, so that the transmission roller presses the belt between the turning roller and the rolling line roller. Step nine: the uncoiler rotates synchronously with the transmission roller along the coiling direction of the strip until the strip head retreats to the upper side of the turning roller; Step ten: repeat steps seven to nine until the strip head is straightened and the strip is successfully unwound and threaded.

[0013] The present application has the following beneficial effects: 1. The steel coil is unwound from the bottom, and compared with the top unwinding mode, the unwinding area equipment can be lifted from the ground to the ground as a whole, saving civil engineering investment and facilitating subsequent equipment maintenance and repair.

[0014] 2. The first unwinding guide plate and the second unwinding guide plate are used in cooperation to ensure smooth unwinding of various specifications of steel coils, especially suitable for the production of thick gauge high strength steel, safe and reliable operation, and high production efficiency.

[0015] 3. The pinch roller, turning roller and rolling line roller are used in cooperation to straighten the strip head part, effectively reducing the strip head warping and facilitating subsequent unwinding and threading. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is a structural schematic diagram of a strong unwinding device of an embodiment of the present application.

[0017] Fig. 2 is a schematic diagram of the unwinding process from the bottom of an embodiment of the present application.

[0018] Fig. 3 is a schematic diagram of the strip head straightening process of an embodiment of the present application.

[0019] BRIEF DESCRIPTION OF DRAWINGS 1. Uncoiler; 2. First unwinding guide plate; 21. Threading guide plate; 22. First swing hydraulic cylinder; 23. Pressing roller; 3. Second unwinding guide plate; 31. Swing guide plate; 32. Second swing hydraulic cylinder; 33. Telescopic guide plate; 34. First telescopic hydraulic cylinder; 35. Spatula; 4. Pinch roller; 41. Swing frame; 42. Third swing hydraulic cylinder; 43. Lifting frame; 44. First lifting hydraulic cylinder; 45. Transmission roller; 5. Turning roller; 6. Rolling line roller; 7. Steel coil; 71. Strip head. DETAILED DESCRIPTION

[0020] To further illustrate the embodiments, the present application provides drawings. These drawings are part of the disclosure of the present application, which mainly serve to illustrate the embodiments, and can be explained in conjunction with the related description of the specification to explain the operating principle of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementations and advantages of the present application. The components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0021] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] Referring to Figs. 1-3 As shown in the drawings, as an embodiment of the present application, a powerful uncoiling device is provided, which is arranged in the inlet area of the rolling mill or the temper mill unit, and is particularly suitable for uncoiling and threading of thick gauge (thickness of 4mm or more) high strength steel coil 7, which comprises an uncoiler 1, a first uncoiling guide plate 2, a second uncoiling guide plate 3, a deflection roller 5, a rolling line roller 6 and a pinch roller 4, the steel coil 7 on the uncoiler 1 is produced by a downward uncoiling method, that is, the strip head 71 is unfolded in the downward direction of the steel coil 7 and enters the rolling mill or the temper mill unit, the downward uncoiling production method can raise the overall uncoiling area equipment, which is beneficial to reduce the civil engineering investment cost and facilitate the subsequent equipment maintenance and repair; the first uncoiling guide plate 2 is located at the outlet of the uncoiler 1, the deflection roller 5 and the rolling line roller 6 are located above the first uncoiling guide plate 2, and the deflection roller 5 and the rolling line roller 6 are arranged in sequence along the unfolding direction of the strip, the second uncoiling guide plate 3 is located above the uncoiler 1, and the pinch roller 4 is located above the deflection roller 5; The first uncoiling guide plate 2 comprises a threading guide plate 21 and a first swing hydraulic cylinder 22 for driving the threading guide plate 21 to swing up and down, the threading guide plate 21 is provided with a pair of pressure rollers 23 at one end close to the uncoiler 1, and the threading guide plate 21 is taken as the rotational center with the axial center line of the deflection roller 5, and the pressure rollers 23 are driven to swing up and down by the first swing hydraulic cylinder 22; The second uncoiling guide plate 3 comprises a swing guide plate 31 and a second swing hydraulic cylinder 32 for driving the swing guide plate 31 to swing up and down, the swing guide plate 31 is provided with a telescopic guide plate 33 and a first telescopic hydraulic cylinder 34 for driving the telescopic guide plate 33 to slide forward and backward, and the front end of the telescopic guide plate 33 is provided with a shovel 35; The pinch roller 4 includes a swing frame 41 and a third swing hydraulic cylinder 42 that drives the swing frame 41 to swing left and right. The swing frame 41 is provided with a lifting frame 43 and a first lifting hydraulic cylinder 44 that drives the lifting frame 43 to move up and down. The lower end of the lifting frame 43 is provided with a transmission roller 45. Both the first swing hydraulic cylinder 22 and the first lifting hydraulic cylinder 44 are equipped with pressure detection devices.

[0024] like Figs. 1-2 As shown, during the uncoiling process, for thick-gauge high-strength steel coils 7, the strip head 71 often adheres tightly to the surface of the coil 7 and cannot unfold. The second swing hydraulic cylinder 32 drives the swing guide plate 31 to swing downwards, and the first telescopic hydraulic cylinder 34 drives the telescopic guide plate 33 to slide forward. Then, the strip head 71 is peeled off using the scraper 35, facilitating strip threading. During uncoiling and threading, the pressure roller 23 presses down on the steel coil 7 to prevent loosening, and the clamping force is adjusted by a pressure detection device. Figs. 2-3 As shown, the left and right positions of the swing frame 41 are adjusted by the third swing hydraulic cylinder 42, and the lifting frame 43 is moved up and down by the first lifting hydraulic cylinder 44, thereby adjusting the lifting height of the transmission roller 45. This allows the transmission roller 45 to press down on the strip above the guide roller 5, thus achieving the clamping and feeding of the strip. Alternatively, the transmission roller 45 can be pressed in the area between the guide roller 5 and the rolling mill 6 to straighten the strip head 71, preventing subsequent threading from getting stuck and ensuring that the strip head 71 can be uncoiled and threaded smoothly. This method is particularly suitable for the production of thick-gauge high-strength steel.

[0025] In this embodiment, the pressure roller 23 is a rubber-lined roller, which can prevent damage to the strip and has a good pressing effect.

[0026] In this embodiment, a first sliding groove is provided on the swing guide plate 31 along the front-back direction, and the telescopic guide plate 33 is slidably disposed on the first sliding groove, which plays a guiding and limiting role for the telescopic guide plate 33 and improves the sliding accuracy of the telescopic guide plate 33.

[0027] In this embodiment, a second slide groove is provided on the swing frame 41 along the vertical direction, and the lifting frame 43 is slidably disposed on the second slide groove, which plays a guiding and limiting role for the lifting frame 43, improving the sliding accuracy of the lifting frame 43, and thus improving the height adjustment accuracy of the transmission roller 45.

[0028] In this embodiment, the scraper 35 is a high-strength hard steel scraper, which is more robust and reliable, ensuring that it can successfully peel off the strip 71.

[0029] In this embodiment, both the steering roller 5 and the rolling mill roller 6 are made of steel to ensure strength and hardness.

[0030] In this embodiment, the transmission roller 45 is a rubber-lined roller, and the transmission roller 45 is connected to a rotary drive component for driving its rotation. The rotary drive component is an electric motor or a hydraulic motor. This arrangement can prevent damage to the strip steel and has a good clamping effect.

[0031] The present invention also provides a method for forcefully unwinding using a forceful unwinding device as described in the above embodiments, comprising the following steps: Step 1: Transport the steel coil 7 onto the uncoiler 1, with the initial position of the lead 71 located at the 7-8 o'clock position below the drum of the uncoiler 1; Step 2: The first swing hydraulic cylinder 22 drives the belt guide plate 21 to swing upward, pressing the belt head 71 through the pressure roller 23 until the pressure P1 set by the pressure detection device on the first swing hydraulic cylinder 22 is reached, and the pressing state is maintained continuously. Step 3: Uncoiler 1 rotates along the strip unfolding direction until the strip head 71 is located at the 11 o'clock position above the drum of uncoiler 1; Step 4: Based on the diameter of the steel coil 7, the second swing hydraulic cylinder 32 drives the swing guide plate 31 to swing downwards until the scraper 35 swings to the position below the head 71. Step 5: The first telescopic hydraulic cylinder 34 drives the telescopic guide plate 33 to extend forward, and the shovel 35 lifts the strip head 71, so that the strip head 71 is separated from the steel coil 7; at the same time, the uncoiler 1 continues to rotate along the strip unfolding direction, and the second uncoiler guide plate 3 guides the strip head 71 to the top of the guide roller 5. Step 6: The third swing hydraulic cylinder 42 drives the swing frame 41 to swing towards the uncoiler 1. At the same time, the first lifting hydraulic cylinder 44 drives the lifting frame 43 to move downward to adjust the height of the lifting frame 43, which in turn drives the transmission roller 45 to move downward. The transmission roller 45 presses the strip head 71 onto the guide roller 5 until the pressure P2 set by the pressure detection device on the first lifting hydraulic cylinder 44 is reached. The transmission roller 45 then stops moving downward and continues to maintain the pressing state. Step 7: The uncoiler 1 and the drive roller 45 rotate synchronously along the strip unfolding direction until the strip head 71 crawls above the rolling mill roller 6; Step 8: The third swing hydraulic cylinder 42 drives the swing frame 41 to swing away from the coiler 1. The first lifting hydraulic cylinder 44 drives the lifting frame 43 to continue to move downward to adjust the height of the lifting frame 43, thereby driving the transmission roller 45 to continue to move downward, so that the transmission roller 45 presses the strip between the guide roller 5 and the rolling mill 6. Step 9: The uncoiler 1 and the drive roller 45 rotate synchronously along the strip winding direction until the strip head 71 returns to above the guide roller 5; Step 10: Repeat steps 7 to 9 several times until the warping of the strip head 71 is eliminated, ensuring that the strip can be smoothly unfolded and threaded.

[0032] In summary, the high-power unwinding device of the present invention has the following advantages: 1. The steel coil adopts the bottom uncoiling method. Compared with the top uncoiling method, the equipment in the uncoiling area can be raised from underground to the ground, saving civil engineering investment and facilitating subsequent equipment inspection and maintenance.

[0033] 2. The first and second uncoiling guide plates work together to ensure that steel coils of various specifications can be uncoiled smoothly. They are especially suitable for the production of thick-gauge high-strength steel, and the operation is safe, reliable and efficient.

[0034] 3. The pinch rolls, guide rolls and rolling mill rolls are used together to straighten the strip head, effectively reducing strip head warping and facilitating subsequent uncoiling and threading.

[0035] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail made to the invention without departing from the spirit and scope of the invention as defined in the appended claims fall within the protection scope of the invention.

Claims

1. A high-power uncoiling device, wherein the device is installed in the inlet area of ​​a rolling mill or leveling mill unit, characterized in that: It includes an uncoiler, a first uncoiler guide plate, a second uncoiler guide plate, a guide roller, a rolling mill roll, and a pinch roll. The steel coil on the uncoiler is produced by bottom uncoiling. The first uncoiler guide plate is located at the exit of the uncoiler. The guide roller and the rolling mill roll are located above the first uncoiler guide plate and are arranged sequentially along the unfolding direction of the strip. The second uncoiler guide plate is located above the uncoiler, and the pinch roll is located above the guide roller. The first uncoiling guide plate includes a threading guide plate and a first swing hydraulic cylinder that drives the threading guide plate to swing up and down. A pair of pressure rollers are provided at one end of the threading guide plate near the uncoiling machine. The threading guide plate rotates around the axial center line of the steering roller and drives the pressure rollers to swing up and down through the first swing hydraulic cylinder. The second uncoiling guide plate includes a swing guide plate and a second swing hydraulic cylinder that drives the swing guide plate to swing up and down. The swing guide plate is provided with a telescopic guide plate and a first telescopic hydraulic cylinder that drives the telescopic guide plate to slide back and forth. The front end of the telescopic guide plate is provided with a shovel. The pinch roller includes a swing frame and a third swing hydraulic cylinder that drives the swing frame to swing left and right. The swing frame is equipped with a lifting frame and a first lifting hydraulic cylinder that drives the lifting frame to move up and down. The lower end of the lifting frame is equipped with a transmission roller. Both the first swing hydraulic cylinder and the first lifting hydraulic cylinder are equipped with pressure detection devices.

2. The high-strength unwinding device according to claim 1, characterized in that: The pressure roller is a rubber-lined roller.

3. The high-strength unwinding device according to claim 1, characterized in that: The swing guide plate has a first slide groove along the front-to-back direction, and the telescopic guide plate is slidably mounted on the first slide groove.

4. The high-strength unwinding device according to claim 1, characterized in that: A second slide groove is provided on the upper and lower sides of the swing frame, and the lifting frame is slidably mounted on the second slide groove.

5. The high-strength unwinding device according to claim 1, characterized in that: The blade is made of high-strength hardened steel.

6. The high-strength unwinding device according to claim 1, characterized in that: Both the steering rollers and the rolling mill rollers are made of steel.

7. The high-strength unwinding device according to claim 1, characterized in that: The drive roller is a rubber-lined roller, and a rotary drive component is connected to the drive roller to drive its rotation.

8. The high-strength unwinding device according to claim 7, characterized in that: The rotary drive is an electric motor or a hydraulic motor.

9. A method for forcefully unwinding a device as described in any one of claims 1-8, characterized in that, Includes the following steps: Step 1: Transport the steel coil onto the uncoiler, with the initial position of the lead coil located at the 7-8 o'clock position below the uncoiler drum; Step 2: The first swing hydraulic cylinder drives the belt guide plate to swing upward, pressing the belt head through the pressure roller until the pressure is reached by the pressure detection device on the first swing hydraulic cylinder, and the pressure is maintained continuously. Step 3: Rotate the uncoiler along the strip unfolding direction until the strip head is located at the 11 o'clock position above the uncoiler drum; Step 4: Based on the diameter of the steel coil, the second swing hydraulic cylinder drives the swing guide plate to swing downwards until the scraper swings to the position below the head. Step 5: The first telescopic hydraulic cylinder drives the telescopic guide plate to extend forward, and the shovel lifts the strip head, causing the strip head to detach from the steel coil; at the same time, the uncoiler continues to rotate along the strip unfolding direction, and the second uncoiler guide plate guides the strip head to the top of the guide roller. Step Six: The third swing hydraulic cylinder drives the swing frame to swing towards the uncoiler, while the first lifting hydraulic cylinder drives the lifting frame to move downward to adjust the height of the lifting frame, thereby driving the transmission roller to move downward. The transmission roller presses the strip head onto the guide roller until the pressure set by the pressure detection device on the first lifting hydraulic cylinder is reached. The transmission roller then stops moving downward and continues to maintain the pressing state. Step 7: The uncoiler and drive rollers rotate synchronously along the strip unfolding direction until the strip head crawls above the rolling mill rolls; Step 8: The third swing hydraulic cylinder drives the swing frame to swing away from the coiler, and the first lifting hydraulic cylinder drives the lifting frame to continue to move downward to adjust the height of the lifting frame, thereby driving the transmission roller to continue to move downward, so that the transmission roller presses the strip between the guide roller and the rolling mill. Step 9: The uncoiler and drive roller rotate synchronously along the strip winding direction until the strip head returns to above the guide roller; Step 10: Repeat steps 7 to 9 several times until the warping at the strip head is eliminated, ensuring that the strip can be smoothly unrolled and threaded.

Images