Temper mill unit and working method thereof

Abstract

The present application belongs to the technical field of steel and non-ferrous metal sheet and strip processing. Disclosed are a temper mill unit and a working method thereof, which aim to solve the problem in the prior art that strip steel is prone to jamming when a strip head passes through various apparatuses. The temper mill unit comprises an uncoiler (2), an uncoiling side guide plate device (3), an uncoiling side tension roll (4), a temper mill (5), a coiling side tension roll (6), a coiling side guide plate device (7) and a coiler (8), which are sequentially arranged from right to left. Both a lower roll of the uncoiling side tension roll and a lower roll of the coiling side tension roll in the temper mill unit can swing up and down, thereby improving the smoothness and automation level of strip threading, greatly improving the threadability, and saving auxiliary production time and improving production efficiency.

Description

Leveling unit and its working method

[0001] Related applications

[0002] This application claims priority to Chinese Patent Application No. 202510035303.5, filed on January 9, 2025, and incorporates the entire contents of the disclosure of the aforementioned patent application as part of this application. Technical Field

[0003] This application relates to the field of steel and non-ferrous metal sheet and strip processing technology, specifically to a leveling unit or a working method of a leveling unit. Background Technology

[0004] In order to improve the unit's yield and save investment, the offline leveling unit adopts a single-coil production mode instead of a continuous production mode. This so-called single-coil production mode means that the production cycle is based on one steel coil. Each coil is repeatedly loaded → threaded → tensioned → leveling and rolling → deceleration and shutdown → unloading → loading... Therefore, the most challenging problem encountered in the offline leveling single-coil production mode is how to shorten the auxiliary time and ensure the smoothness of strip threading each time within the limited auxiliary time. This is also a world-class problem because the steel coils produced by the leveling unit are annealed steel coils, and the strip is relatively soft. On the other hand, after cold continuous rolling, the strip is relatively thin, with the thickness dropping to 0.17mm or even thinner. When such soft and thin strip passes through various equipment, even slight obstruction will prevent the strip head from moving forward. When thin material needs to be uncoiled and wound with low tension and chooses to go down the channel and snake around through the vertical tension roller, the obstruction of the strip head at the inlet and outlet tension rollers is even more serious. This is also a domestic and international industry problem currently encountered in the leveling production of sheet and strip.

[0005] In summary, ensuring the smoothness of tape threading in offline leveling production mode is of great significance for saving auxiliary operation time and improving the production efficiency of the unit. This is also an industry problem that has plagued the production of leveling units. Although some guide plates or devices for auxiliary tape threading have been proposed in the existing technology to improve the tape threading jamming problem, the smoothness of tension roller tape threading and the smoothness of auxiliary tape threading have not been fundamentally solved, which greatly affects the production efficiency of leveling units. Summary of the Invention

[0006] To address the problem of strip steel easily getting stuck when passing through various devices, this application provides a leveling unit and its operating method. In the leveling unit, the lower rollers of both the uncoiling side tension roller and the coiling side tension roller can swing up and down, improving the smoothness and automation of strip threading. This greatly improves the passability of strip threading, thereby saving auxiliary production time and increasing production efficiency.

[0007] The technical solution adopted by the embodiments of this application to solve its technical problem is:

[0008] This application provides a leveling unit, including, from right to left, an uncoiler, an uncoiling side guide plate device, an uncoiling side tension roller, a leveling machine, a winding side tension roller, a winding side guide plate device, and a winding machine; the uncoiling side guide plate device includes an uncoiling side fixed guide plate, which can be raised, lowered, and oscillated; the uncoiling side tension roller includes an upper uncoiling side roller and an lower uncoiling side roller arranged vertically, the lower uncoiling side roller can oscillate above or below the upper uncoiling side roller, and when the lower uncoiling side roller oscillates to its upper limit position, an upper uncoiling side channel is formed between the upper uncoiling side roller and the lower uncoiling side roller; the winding side tension roller includes an upper winding side roller and a lower winding side roller arranged vertically, the lower winding side roller can oscillate above or below the upper winding side roller, and when the lower winding side roller oscillates to its upper limit position, an upper winding side channel is formed between the upper winding side roller and the lower winding side roller; the winding side guide plate device includes a fixed winding side guide plate, which can be raised, lowered, and oscillated.

[0009] This application embodiment also provides a working method for the above-mentioned leveling unit, including the following steps:

[0010] Step 1: Preparation;

[0011] Step 2: Transport the steel coil to the uncoiler. The lower uncoiling roller of the tension roller on the uncoiling side is at the upper limit position, and the fixed guide plate on the uncoiling side is at the upper limit position.

[0012] Step 3: The uncoiler operates, causing the strip of the steel coil to pass sequentially through the fixed guide plate on the uncoil side, the upper channel on the uncoil side, and the roller gap of the leveler. The roller gap of the leveler closes and clamps the steel strip.

[0013] Step 4: Apply rolling force to the leveling rolls of the leveling machine, start the drive motor of the leveling machine, and establish tension on the steel strip between the leveling machine and the uncoiler;

[0014] Step 5: The uncoiling side fixed guide plate moves to the lower limit position, and then the uncoiling side tension roller swings to the lower limit position.

[0015] Step 6: The lower roll on the winding side of the tension roller is at its upper limit position, and the fixed guide plate on the winding side is at its upper limit position.

[0016] Step 7: The uncoiler, uncoiling side tension roller, leveler, winding side tension roller and coiler operate simultaneously at the threading speed. The strip head of the steel coil enters the coiler, and tension is established on the steel strip between the coiler and the leveler.

[0017] Step 8: The winding-side fixed guide plate moves to the lower limit position, and then the winding-side tension roller swings to the lower limit position.

[0018] The beneficial effects of the embodiments of this application include:

[0019] 1. Existing technologies either add an auxiliary belt threading mechanism to the tension roller or optimize the electrical control program, but cannot fundamentally solve the problem of the belt head getting stuck when passing through the tension roller in an "S-shape" under no traction force during belt threading. This application starts from three aspects: the entire production process of the leveling unit, equipment structure innovation, and electrical automatic control, and realizes one-click fully automatic control of the belt threading process, saving production auxiliary time and improving labor efficiency.

[0020] 2. The traditional serpentine vertical tension roller design for each coil has been completely abandoned. A new threading mode has been proposed, where the lower tension roller rotates and swings around the upper roller to lift it. After the strip passes through the upper roller, the lower roller drives the strip back to its lower position. To complement this swinging tension roller, an integrated lifting threading guide plate has been implemented. The swinging and telescopic mechanisms of the guide plate are mounted on the integrated lifting platform, avoiding interference from the tension roller's swing. This structurally avoids the jamming problem of the tension roller causing the strip to pass through without traction.

[0021] 3. To achieve one-click tape threading, the current leveling unit equipment configuration was improved by adding detection of component monitoring and the logical sequence of each device's actions. An automatic control program for one-click tape threading was built, and action interlocking conditions were established by detecting signals and current signal status to avoid equipment collisions. This achieved an intelligent one-click tape threading mode and saved labor intensity. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0023] Figure 1 is an overall schematic diagram of the leveling unit according to an embodiment of this application.

[0024] Figure 2 is a schematic diagram when the lower roller on the uncoiling side swings to the upper limit position and the fixed guide plate on the uncoiling side is located at the upper limit position.

[0025] Figure 3 is a schematic diagram when the lower roller on the uncoiling side swings to the lower limit position and the fixed guide plate on the uncoiling side is located at the lower limit position.

[0026] Figure 4 is a schematic diagram when the lower roller on the winding side swings to the upper limit position and the fixed guide plate on the winding side is located at the upper limit position.

[0027] Figure 5 is a schematic diagram when the lower roller on the winding side swings to the lower limit position and the fixed guide plate on the winding side is located at the lower limit position.

[0028] Figure 6 is a schematic diagram of the unwinding side guide plate device in an embodiment of this application.

[0029] Figure 7 is a schematic diagram of the uncoiling side guide plate device in an embodiment of this application when it includes the second movable uncoiling side guide plate.

[0030] Figure 8 is a schematic diagram of the winding side guide plate device in an embodiment of this application.

[0031] Figure 9 is a schematic diagram of the steel coil on the ground roller in an embodiment of this application.

[0032] Figure 10 is a schematic diagram of the three-roll straightener processing the belt head in an embodiment of this application.

[0033] Explanation of reference numerals in the attached drawings: 1. Preparation station; 2. Uncoiler; 3. Uncoil side guide plate device; 4. Uncoil side tension roller; 5. Leveler; 6. Winding side tension roller; 7. Winding side guide plate device; 8. Winding machine; 9. Coil transport car; 10. Steel coil; 11. Ground roller; 12. Three-roll straightener; 31. Uncoil side fixed guide plate; 32. Uncoil side first movable guide plate; 33. Uncoil side lifting slider; 34. Uncoil side upper rotating shaft; 35. Uncoil side frame column; 36. Uncoil side swing hydraulic cylinder; 37. Uncoil side lower rotating shaft; 38. Uncoil side lifting drive mechanism; 39. Uncoil side second movable guide plate; 310. Uncoil side first telescopic mechanism; 311. Uncoil side second telescopic mechanism; 41. Uncoil side upper roller; 42. Uncoil side lower roller; 43. Uncoil side upper channel; 51. Leveling roll; 52. Inlet photoelectric switch; 53. Outlet photoelectric switch; 54. Roll gap; 61. Upper roll on the winding side; 62. Lower roll on the winding side; 63. Upper channel on the winding side; 71. Fixed guide plate on the winding side; 72. First movable guide plate on the winding side; 73. Lifting slider on the winding side; 74. Upper rotating shaft on the winding side; 75. Frame column on the winding side; 76. Swing hydraulic cylinder on the winding side; 77. Lower rotating shaft on the winding side; 78. Lifting drive mechanism on the winding side; 79. Second movable guide plate on the winding side; 710. First telescopic mechanism on the winding side; 711. Second telescopic mechanism on the winding side; 101. Strip head; 102. Steel strip. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] For ease of understanding and description, absolute positional relationships are used in the following description of this application. Unless otherwise specified, the directional term "up" refers to the upper direction in Figure 1, "down" refers to the lower direction in Figure 1, "left" refers to the left side direction in Figure 1, "right" refers to the right side direction in Figure 1, "front" refers to the direction perpendicular to the paper of Figure 1 and pointing inwards from the paper, and "back" refers to the direction perpendicular to the paper of Figure 1 and pointing outwards from the paper. This application is described from the perspective of the reader or user, but the above directional terms should not be understood or interpreted as limiting the scope of protection of this application. Regarding the dimensions and angles of the components, those skilled in the art can determine them specifically according to actual needs or a limited number of experiments.

[0036] As shown in Figures 1 to 8, an embodiment of this application describes a leveling unit, comprising, from right to left, an uncoiler 2, an uncoil side guide plate device 3, an uncoil side tension roller 4, a leveler 5, a winding side tension roller 6, a winding side guide plate device 7, and a winding machine 8; the uncoil side guide plate device 3 includes an uncoil side fixed guide plate 31, which is capable of lifting, lowering, and swinging; the uncoil side tension roller 4 includes an upper uncoil side roller 41 and a lower uncoil side roller 42 arranged vertically, the lower uncoil side roller 42 being capable of swinging above or below the upper uncoil side roller 41, when unwinding... When the lower side roller 42 swings to its upper limit position, an upper unwinding channel 43 is formed between the upper unwinding side roller 41 and the lower unwinding side roller 42; the winding side tension roller 6 includes an upper winding side roller 61 and a lower winding side roller 62 arranged vertically, and the lower winding side roller 62 can swing to above or below the upper winding side roller 61. When the lower winding side roller 62 swings to its upper limit position, an upper winding side channel 63 is formed between the upper winding side roller 61 and the lower winding side roller 62; the winding side guide plate device 7 includes a winding side fixed guide plate 71, which can be raised, lowered, and swung.

[0037] As shown in Figure 6, the uncoiling side guide plate device 3 also includes an uncoiling side lifting slider 33, an uncoiling side lifting drive mechanism 38, and an uncoiling side frame column 35. The two uncoiling side lifting sliders 33 and the two uncoiling side frame columns 35 are spaced apart. The uncoiling side lifting sliders 33 are upright block structures, and the uncoiling side frame columns 35 are upright column structures. The upper and lower ends of the two uncoiling side frame columns 35 are connected and fixed by crossbeams. The uncoiling side lifting drive mechanism 38 can drive the uncoiling side lifting sliders 33 to move up and down along the uncoiling side frame columns 35. The lifting drive mechanism may include a motor, a coupling, a connecting shaft, a gear, and a rack connected in sequence. The rack and the uncoiling side lifting sliders 33 can be fixed by bolts, and the motor is mounted on the uncoiling side frame.

[0038] The left end of the uncoiling-side fixed guide plate 31 is connected to the upper part of the uncoiling-side lifting slider 33 via the uncoiling-side upper rotating shaft 34. The uncoiling-side upper rotating shaft 34 passes through two uncoiling-side lifting sliders 33. The uncoiling-side fixed guide plate 31 is connected to the lower part of the uncoiling-side lifting slider 33 via the uncoiling-side swing hydraulic cylinder 36 and the uncoiling-side lower rotating shaft 37. The uncoiling-side lower rotating shaft 37 passes through two uncoiling-side lifting sliders 33. The uncoiling-side upper rotating shaft 34 and the uncoiling-side lower rotating shaft 37 are spaced apart vertically. The axes of the uncoiling-side upper rotating shaft 34 and the uncoiling-side lower rotating shaft 37 are both along the front-back direction. Extending further, the two ends of the uncoiling-side swing hydraulic cylinder 36 are respectively hinged to the uncoiling-side fixed guide plate 31 and the uncoiling-side lower rotating shaft 37. The uncoiling-side swing hydraulic cylinder 36 is located below the uncoiling-side fixed guide plate 31. The uncoiling-side swing hydraulic cylinder 36 can drive the uncoiling-side fixed guide plate 31 to swing up and down around the uncoiling-side upper rotating shaft 34. The uncoiling-side fixed guide plate 31 is connected in layers with the uncoiling-side first movable guide plate 32. The uncoiling-side first telescopic mechanism 310 can make the uncoiling-side first movable guide plate 32 extend to the right or retract to the left. The uncoiling-side first telescopic mechanism 310 can be a hydraulic cylinder.

[0039] As shown in Figures 2 and 3, when the uncoiling-side fixed guide plate 31 is at its upper limit position, the uncoiling-side lifting slider 33 is also at its upper limit position, and the uncoiling-side swing hydraulic cylinder 36 is in the extended state. The left end of the uncoiling-side fixed guide plate 31 along the vertical direction is located between the upper end of the uncoiling-side upper roller 41 and its axis. The right end of the uncoiling-side fixed guide plate 31 is lower than its left end. The right end of the uncoiling-side fixed guide plate 31 along the vertical direction is located between the upper end of the uncoiling-side upper roller 41 and its lower end. The first uncoiling-side... After the movable guide plate 32 extends to the right, the uncoiling side fixed guide plate 31 and the uncoiling side first movable guide plate 32 can guide the lead 101 of the steel coil 10 on the uncoiling machine 2 into the uncoiling side upper channel 43; when the uncoiling side fixed guide plate 31 is at the lower limit position, the uncoiling side lifting slider 33 is at the lower limit position, the uncoiling side swing hydraulic cylinder 36 is in the retracted limit state, the left end of the uncoiling side fixed guide plate 31 is lower than the lower end of the uncoiling side lower roller 42 when it is at the lower limit position, and the right end of the uncoiling side fixed guide plate 31 is lower than the left end of the uncoiling side fixed guide plate 31.

[0040] As shown in Figure 7, when the steel strip is thin, in order to better guide the steel strip head between the tension roller and the guide plate device, the uncoiling side guide plate device 3 may also include an uncoiling side second movable guide plate 39 and an uncoiling side second telescopic mechanism 311. The uncoiling side second telescopic mechanism 311 is located below the uncoiling side fixed guide plate 31. The uncoiling side second telescopic mechanism 311 can be a hydraulic cylinder, which enables the uncoiling side second movable guide plate 39 to extend to the left or retract to the right relative to the uncoiling side fixed guide plate 31. To avoid the steel strip head getting stuck at the overlap of the uncoiling side first movable guide plate 32, the uncoiling side fixed guide plate 31, and the uncoiling side second movable guide plate 39, the uncoiling side first movable guide plate 32, the uncoiling side fixed guide plate 31, and the uncoiling side second movable guide plate 39 are stacked sequentially from top to bottom.

[0041] The uncoiling-side guide plate device 3 also includes an uncoiling-side first proximity switch, an uncoiling-side second proximity switch, and an uncoiling-side third proximity switch. The uncoiling-side first proximity switch can detect whether the uncoiling-side lifting slider 33 is at its lower limit position. The uncoiling-side first proximity switch can be installed on the uncoiling-side frame column 35. The uncoiling-side second proximity switch can detect whether the uncoiling-side swing hydraulic cylinder 36 is in its retracted limit state (i.e., position). The uncoiling-side second proximity switch can be installed on the cylinder of the uncoiling-side swing hydraulic cylinder 36. The uncoiling-side third proximity switch can detect whether the uncoiling-side first movable guide plate 32 is in its retracted limit state (i.e., position). The uncoiling-side third proximity switch can be installed on the uncoiling-side fixed guide plate 31.

[0042] The uncoiling-side tension roller 4 can be the type of vertical tension roller for a leveling machine as described in Chinese patent application CN117696646A, published on March 15, 2024, entitled "Vertical Tension Rollers for Leveling Machine Inlet and Outlet, Leveling Machine Unit and Belt Threading Method". The uncoiling-side tension roller 4 also includes an uncoiling-side lower roller locking cylinder, an uncoiling-side fourth proximity switch, and an uncoiling-side fifth proximity switch. The uncoiling-side lower roller locking cylinder can lock the uncoiling-side lower roller 42 at its lower limit position. The uncoiling-side fourth proximity switch can detect whether the uncoiling-side lower roller locking cylinder is in its retracted limit state, and the uncoiling-side fifth proximity switch can detect whether the uncoiling-side lower roller 42 is at its lower limit position.

[0043] The right end of the first movable guide plate 32 on the unwinding side can always be located outside the right end of the fixed guide plate 31 on the unwinding side, and the left end of the second movable guide plate 39 on the unwinding side can always be located outside the left end of the fixed guide plate 31 on the unwinding side. To ensure stable and reliable extension and retraction of the first movable guide plate 32 and the second movable guide plate 39 on the unwinding side, grooves are provided at both the front and rear ends of the fixed guide plate 31 on the unwinding side. For example, a first groove is provided on the right side of both the front and rear ends of the fixed guide plate 31 on the unwinding side, and a second groove is provided on the left side of both the front and rear ends of the fixed guide plate 31 on the unwinding side. The front and rear ends of the first movable guide plate 32 on the unwinding side are matched and inserted into the first groove, and the front and rear ends of the second movable guide plate 39 on the unwinding side are matched and inserted into the second groove. The unwinding side guide plate device 3 also includes a sixth proximity switch on the unwinding side, which can detect whether the second movable guide plate 39 on the unwinding side is in its retracted limit state (i.e., position).

[0044] As shown in Figure 1, the leveling machine 5 includes leveling rolls 51. A roll gap 54 is formed between the upper and lower leveling rolls 51. An inlet photoelectric switch 52 is installed on the inlet side of the leveling rolls 51, and an outlet photoelectric switch 53 is installed on the outlet side of the leveling rolls 51. The inlet photoelectric switch 52 can detect whether the lead 101 of the steel coil 10 has passed through the inlet photoelectric switch 52, and the outlet photoelectric switch 53 can detect whether the lead 101 of the steel coil 10 has passed through the outlet photoelectric switch 53. The roll gap 54, the uncoiling side upper channel 43, and the coiling side upper channel 63 are approximately at the same horizontal level.

[0045] As shown in Figure 8, the structure of the take-up side guide plate device 7 is basically the same as that of the unwinding side guide plate device 3. The take-up side guide plate device 7 also includes a take-up side lifting slider 73, a take-up side lifting drive mechanism 78, and a take-up side frame column 75. The right end of the take-up side fixed guide plate 71 is connected to the upper part of the take-up side lifting slider 73 via a take-up side upper rotating shaft 74. The take-up side fixed guide plate 71 is connected to the lower part of the take-up side lifting slider 73 via a take-up side swing hydraulic cylinder 76 and a take-up side lower rotating shaft 77. The axis of the take-up side upper rotating shaft 74 and the axis of the take-up side lower rotating shaft 77 are... The axes of all extend in the front-to-back direction. The winding-side lifting drive mechanism 78 enables the winding-side lifting slider 73 to move up and down along the winding-side frame column 75. The winding-side swing hydraulic cylinder 76 enables the winding-side fixed guide plate 71 to swing up and down around the winding-side upper rotating shaft 74. The winding-side fixed guide plate 71 is stacked with the winding-side first movable guide plate 72. The winding-side first telescopic mechanism 710 enables the winding-side first movable guide plate 72 to extend to the left or retract to the right.

[0046] As shown in Figures 4 and 5, when the winding-side fixed guide plate 71 is at its upper limit position, the winding-side lifting slider 73 is also at its upper limit position, and the winding-side swing hydraulic cylinder 76 is in the extended state. The right end of the winding-side fixed guide plate 71 is located between the upper end of the winding-side upper roller 61 and the axis of the winding-side upper roller 61 in the vertical direction. The left end of the winding-side fixed guide plate 71 is lower than the right end. After the first movable guide plate 72 of the winding side extends to the left, the winding-side fixed guide plate 71 and the winding... The first movable guide plate 72 on the take-up side can guide the lead 101 of the steel coil 10 output from the upper channel 63 on the take-up side to the inlet of the coiler 8; when the fixed guide plate 71 on the take-up side is in the lower limit position, the lifting slider 73 on the take-up side is in the lower limit position, the swing hydraulic cylinder 76 on the take-up side is in the retracted limit state, the right end of the fixed guide plate 71 on the take-up side is lower than the lower end of the lower roller 62 on the take-up side when it is in the lower limit position, and the left end of the fixed guide plate 71 on the take-up side is lower than the right end of the fixed guide plate 71 on the take-up side.

[0047] The take-up side guide plate device 7 also includes a first take-up side proximity switch, a second take-up side proximity switch, and a third take-up side proximity switch. The first take-up side proximity switch can detect whether the take-up side lifting slider 73 is at the lower limit position. The second take-up side proximity switch can detect whether the take-up side swing hydraulic cylinder 76 is in the retracted limit state. The third take-up side proximity switch can detect whether the first take-up side movable guide plate 72 is in the retracted limit state.

[0048] The structure of the take-up side tension roller 6 can be the same as that of the unwinding side tension roller 4. The take-up side tension roller 6 and the unwinding side tension roller 4 are symmetrical and mirror images of each other. The take-up side tension roller 6 also includes a take-up side lower roller locking cylinder, a take-up side fourth proximity switch, and a take-up side fifth proximity switch. The take-up side lower roller locking cylinder can lock the take-up side lower roller 62 in the lower limit position. The take-up side fourth proximity switch can detect whether the take-up side lower roller locking cylinder is in the retracted limit state. The take-up side fifth proximity switch can detect whether the take-up side lower roller 62 is in the lower limit position.

[0049] As shown in Figure 8, when the steel strip is thin, in order to better guide the steel strip head between the tension roller and the guide plate device, the winding-side guide plate device 7 may also include a second movable guide plate 79 on the winding side and a second telescopic mechanism 711 on the winding side. The second telescopic mechanism 711 on the winding side is located below the fixed guide plate 71 on the winding side. The second telescopic mechanism 711 on the winding side can be a hydraulic cylinder, which enables the second movable guide plate 79 on the winding side to extend to the right or retract to the left relative to the fixed guide plate 71 on the winding side. To avoid the steel strip head getting stuck at the overlap of the second movable guide plate 79 on the winding side, the fixed guide plate 71 on the winding side, and the first movable guide plate 72 on the winding side, the second movable guide plate 79 on the winding side, the fixed guide plate 71 on the winding side, and the first movable guide plate 72 on the winding side are stacked sequentially from top to bottom.

[0050] As shown in Figures 1, 9, and 10, the leveling unit also includes a preparation station 1 and a coil transport vehicle 9. Both the preparation station 1 and the coil transport vehicle 9 can be existing technologies. The preparation station 1 is located off-line, relatively independent of the main line of the leveling unit. During normal production, it handles strip ends, removes steel coil strapping, and inspects the strip. Therefore, the preparation station is generally operated and inspected manually by designated personnel. The preparation station 1 contains a ground roller 11 and a three-roll straightener 12. The preparation station 1 is located to the right of the uncoiler 2. The coil transport vehicle 9 can transport the steel coils 10 from the ground roller 11 to the uncoiler 2, and can also remove the steel coils 10 from the coiler 8. The coiler 8 can move left and right.

[0051] The working method of the above-mentioned leveling unit is described below. The working method completes the strip steel passing from the uncoiler 2 → uncoiler side tension roller 4 → leveling machine 5 → coiling side tension roller 6 → coiler 8 automatically without manual intervention. The working method includes the following steps in sequence:

[0052] Step 1: Preparation;

[0053] To automate the threading process, the strip head 101 of the processed steel coil 10 is first positioned in preparation station 1. The strip head 101 is then subjected to a certain degree of tilting using a three-roll straightener, transforming the curved section of the strip head 101 into a flat section. The size of the tilt is related to the diameter of the straightening roller, the roller gap, the straightening roller reduction, and the thickness of the strip, so that the strip head can be inserted into the gap of the equipment during subsequent threading. After the straightened and trimmed steel coil is processed, the steel coil needs to be rotated and the strip head stopped at angle a shown in Figures 9 and 10. This ensures that the strip head direction of each steel coil is at the same angle when the coiling trolley picks up the coil from the preparation station (high precision is not required). This angle is set to a fixed value in the electrical program.

[0054] Step 2: Transport the steel coil 10 to the uncoiler 2. The lower uncoiling roller 42 of the tension roller 4 on the uncoiling side is in the upper limit position, the fixed guide plate 31 on the uncoiling side is in the upper limit position, and the first movable guide plate 32 on the uncoiling side is in the limit position of extending to the right. That is, the fixed guide plate 31 on the uncoiling side and the first movable guide plate 32 on the uncoiling side are in the working position.

[0055] When the coil carrier 9 transports the steel coil 10 from the preparation station to the uncoiler 2, the unit's electrical control system receives a signal from the uncoiler 2 to increase the coil diameter. The hydraulic cylinder of the coil carrier then descends, and the threading process begins. At this time, the lower roller 42 on the uncoiling side swings upward, and the fixed guide plate 31 and the first movable guide plate 32 on the uncoiling side move to the working position. To save time, this action can be completed before the steel coil is coiled. After the fixed guide plate 31 on the uncoiling side reaches its upper limit position, the proximity switch receives a signal. The fixed guide plate 31 and the first movable guide plate 32 on the uncoiling side can calculate the swing angle and extension length based on the coil diameter. The actions of the swing hydraulic cylinder 36 and the telescopic hydraulic cylinder on the uncoiling side can be monitored by a displacement sensor.

[0056] Step 3: The uncoiler 2 operates, causing the strip 101 of the steel coil 10 to pass through the uncoiling side fixed guide plate 31, the uncoiling side upper channel 43, and the roll gap 54 of the leveler 5 in sequence. When the strip 101 passes through the roll gap 54, the roll gap 54 of the leveler 5 closes and clamps the steel strip 102.

[0057] After the uncoiling side guide plate device 3 has completed its operation, the uncoiler 2 reverses (rotates clockwise) the steel coil 10 according to the position of the strip head 101, and rotates the strip head 101 to the uncoiling position of the uncoiling side guide plate device 3. Then the uncoiler 2 rotates forward (counterclockwise) the steel coil 10, and pushes the strip head 101 into the uncoiling side upper channel 43 and the roll gap 54 in sequence along the uncoiling side fixed guide plate 31 and the uncoiling side first movable guide plate 32 of the uncoiling side guide plate device 3. At this time, the inlet photoelectric switch 52 records the position of the strip head 101, and the electrical control system automatically calculates according to the uncoiling speed. When the strip head 101 passes through the roll gap 54 of the leveler, the roll gap 54 of the leveler closes and presses down to clamp the steel strip 102.

[0058] Step 4: Apply rolling force to the leveling rolls 51 of the leveling machine 5, start the drive motor of the leveling machine 5, and establish tension on the steel strip 102 between the leveling machine 5 and the uncoiler 2.

[0059] After the roll gap 54 of the leveling machine is closed, a small rolling force of a certain magnitude is applied to the leveling roll 51 through the AGC cylinder of the leveling machine 5. The drive motor of the leveling machine 5 is started, and tension is established on the steel strip 102 between the leveling machine 5 and the uncoiler 2.

[0060] Step 5: The uncoiling side fixed guide plate 31 moves to the lower limit position, and then the uncoiling side lower roller 42 of the uncoiling side tension roller 4 swings to the lower limit position.

[0061] After the inlet is set up, the uncoiling side fixed guide plate 31 moves to the lower limit position, and the uncoiling side first movable guide plate 32 is in the left retracted limit position waiting. Then, the uncoiling side lower roller 42 swings down with the steel strip 102 to the lower limit position, automatically completing the S-shaped curve of the steel strip 102. The uncoiling side fifth proximity switch receives a signal, the uncoiling side lower roller locking cylinder locks the uncoiling side lower roller 42, and the uncoiling side fourth proximity switch receives a signal. At this time, the automatic threading on the inlet side is completed.

[0062] Step 6: The lower roll 62 on the winding side of the tension roller 6 is in the upper limit position, the fixed guide plate 71 on the winding side is in the upper limit position, and the first movable guide plate 72 on the winding side is in the limit position of extending to the left, that is, the fixed guide plate 71 on the winding side and the first movable guide plate 72 on the winding side are in the working position.

[0063] The exit photoelectric switch 53 is used to detect the position of the belt head 101. After receiving a signal from this switch, the electronic control system can accurately calculate the time when the belt head enters the winding machine 8. When the belt is threaded on the inlet side, the lower winding roller 62 of the winding side tension roller 6 can swing to the upper limit position, and the winding side fixed guide plate 71 can run to the upper limit position. Since the drum diameter of the exit winding machine 8 is usually only 420mm, 508mm, and 610mm, the upper limit position of the winding side fixed guide plate 71 can also be set to three corresponding sizes, and can automatically swing to the working position according to the diameter of the drum.

[0064] Step 7: Uncoiler 2, uncoil side tension roller 4, leveler 5, winding side tension roller 6 and coiler 8 operate simultaneously at the threading speed, and the strip head 101 of the steel coil 10 enters the coiler 8, establishing tension on the steel strip 102 between the coiler 8 and the leveler 5.

[0065] When the winding-side fixed guide plate 71 is at its upper limit position and the winding-side first movable guide plate 72 is at its leftward extension limit position, after the inlet completes the threading, the uncoiler 2, the uncoil-side tension roller 4, the leveler 5, the winding-side tension roller 6, and the coiler 8 operate simultaneously at the threading speed. At this time, the leveler 5 is set to the pinch roller pinching working mode to assist in threading. When the steel strip 102 enters the coiler 8 and is wound 3-5 times, tension is established on the steel strip 102 between the coiler 8 and the leveler 5.

[0066] Step 8: The winding-side fixed guide plate 71 moves to the lower limit position, and then the winding-side lower roller 62 of the winding-side tension roller 6 swings to the lower limit position.

[0067] When the coil-side fixed guide plate 71 moves to the lower limit position and the coil-side first movable guide plate 72 retracts to the right to the limit position to wait, after each state proximity switch receives a signal, the coil-side lower roller 62 of the coil-side tension roller 6 swings down to the lower limit position along with the steel strip 102. When the fifth proximity switch of the coil side receives a signal, the strip automatically completes the S-shaped curve winding. The locking hydraulic cylinder of the coil-side tension roller 6 locks the coil-side lower roller 62. When the fourth proximity switch of the coil side receives a signal, the entire leveling unit has completed the strip threading and the unit can enter the normal production state.

[0068] This application optimizes the one-click belt threading equipment and method. To ensure smooth belt threading, the traditional method of the belt head serpentinely "S-shaped" around the lower roller and then onto the upper roller surface is difficult to achieve. This poses a high risk of jamming for soft, thin belts, and manual intervention wastes operation time and affects efficiency. Therefore, to ensure smooth belt threading, the serpentine movement of the belt head around the vertical tension roller must be fundamentally eliminated. To this end, this application proposes a swing-type tension roller and a single-channel and dual-channel integrated lifting structure belt threading guide plate equipment and method.

[0069] First, before threading, the inlet and outlet threading guide plates are lowered to their lower limit position via an integrated lifting mechanism (hydraulic cylinder or motor-driven synchronous lifting mechanism) to avoid interference from the rotational swing of the lower tension roller. A proximity switch is installed at this position (including the overall lifting, swinging, and extension / retraction of the guide plate) as a waiting position for detecting the threading guide plate. At this point, the lower tension roller can rotate and swing upwards to an angle slightly above the upper tension roller. In this state, the threading guide plate rises to the upper channel position, and then the swing cylinder swings up. The swing angle is determined based on the displacement sensor and the steel coil diameter recorded electrically. Finally, the telescopic guide plate extends by the calculated displacement under the drive of the telescopic cylinder. This creates an upper channel between the uncoiler and the upper surface of the upper tension roller, allowing the strip head to enter the upper surface of the tension roller along the threading guide plate channel. Once tension is established between the uncoiler and the leveler, the uncoiling and threading guide plates can retract, swing down, and descend to the initial test position sequentially. When the incoming material is relatively thick and the tension roller is not required to participate in the work, the lower tension roller is stationary at its upper limit position, and the motor does not need to drive it. The upper roller is used as a steering roller, and the motor speed can follow the production speed of the unit. When producing thin material, in order to avoid strip breakage due to high tension at the inlet, the tension roller needs to participate in the production. The lower tension roller rotates downward and swings back under the drive of a hydraulic cylinder or rotary motor. The hydraulic cylinder locks the swing mechanism of the lower roller. During this rotation and swing process, the lower roller drives the strip steel to automatically form an S-shaped winding curve, avoiding the strip head from making an S-shaped movement through the tension roller without traction, thus avoiding the problem of strip jamming.

[0070] To achieve one-click electrical harness installation automation:

[0071] The electrical control program was written to enable the one-click threading process. The sequence of motion of the tension rollers at the inlet section is as follows:

[0072] Uncoiling side lower roller 42 swings up → Uncoiling side fixed guide plate 31 rises → Uncoiling side fixed guide plate 31 swings up → Uncoiling side first movable guide plate 32 extends → Stop → Uncoiling side tension roller 4 rotates at the threading speed → Uncoiling machine 2 rotates steel coil 10 at the threading speed → Automatically threading to leveling machine 5 (whether it bites into the closed roller gap or passes through the open roller gap and then presses down can be selected by the on-site operator) → Uncoiling machine 2 and leveling machine 5 establish tension → Uncoiling side fixed guide plate 31 and uncoiling side first movable guide plate 32 return to the initial position, uncoiling side lower roller 42 swings down → Lock uncoiling side lower roller 42.

[0073] The following electrical interlocking requirements must be met during the installation of the belt at the entrance section:

[0074] Only when the first proximity switch on the uncoiling side detects that the lifting slider 33 on the uncoiling side is at its lower limit position, the second proximity switch on the uncoiling side detects that the swing hydraulic cylinder 36 on the uncoiling side is in its retracted limit state, and the third proximity switch on the uncoiling side detects that the first movable guide plate 32 on the uncoiling side is in its retracted limit state, can the rotating swing hydraulic cylinder or motor of the lower roller 42 on the uncoiling side be started, and the lower roller 42 on the uncoiling side be able to swing downward.

[0075] The lower roller locking cylinder can only lock the lower roller 42 when the fifth proximity switch on the unwinding side detects that the lower roller 42 on the unwinding side is in the lower limit position; the fifth proximity switch on the unwinding side must be opened before the lower roller 42 on the unwinding side swings downward.

[0076] Only when the second proximity switch on the uncoiling side detects that the swing hydraulic cylinder 36 on the uncoiling side is in the retraction limit state and the third proximity switch on the uncoiling side detects that the first movable guide plate 32 on the uncoiling side is in the retraction limit state can the coil carrier 9 enter the range of the uncoiling machine 2 and place the steel coil 10 on the uncoiling machine 2, so as to avoid interference between the steel coil and the guide plate.

[0077] The sequence of operation of the tension roller in the outlet section is as follows:

[0078] The lower take-up roller 62 swings upward → the fixed guide plate 71 on the take-up side rises → the fixed guide plate 71 on the take-up side swings upward → the first movable guide plate 72 on the take-up side extends → stop → the tension roller 6 on the take-up side rotates at the threading speed → the take-up machine 8 rotates at the threading speed → the automatic threading from the leveler 5 through the tension roller 6 on the take-up side and the guide plate device 7 on the take-up side enters the take-up machine 8 → the take-up machine 8 and the leveler 5 establish tension → the fixed guide plate 71 on the take-up side and the first movable guide plate 72 on the take-up side return to their initial positions, the lower take-up roller 62 on the take-up side swings downward → the locking cylinder locks the lower take-up roller 62 on the take-up side → the tension roller 6 on the take-up side rotates at the threading speed to cooperate with the exit tension roller for threading.

[0079] The following electrical interlocking requirements must be met during the tape threading process at the exit section:

[0080] Only when the first proximity switch on the winding side detects that the lifting slider 73 on the winding side is at its lower limit position, the second proximity switch on the winding side detects that the swing hydraulic cylinder 76 on the winding side is in its retracted limit state, and the third proximity switch on the winding side detects that the first movable guide plate 72 on the winding side is in its retracted limit state, can the rotating swing hydraulic cylinder or motor of the lower roller 62 on the winding side be started, and the lower roller 62 on the winding side be able to swing downward.

[0081] The lower roll locking cylinder can only lock the lower roll 62 when the fifth proximity switch on the take-up side detects that the lower roll 62 on the take-up side is in the lower limit position; the fifth proximity switch on the take-up side must be opened before the lower roll 62 on the take-up side swings downward.

[0082] Only when the second proximity switch on the winding side detects that the swing hydraulic cylinder 76 on the winding side is in the retraction limit state and the third proximity switch on the winding side detects that the first movable guide plate 72 on the winding side is in the retraction limit state can the transport vehicle 9 enter the range of the winding machine 8 and take away the steel coil 10 on the winding machine 8, so as to avoid interference between the steel coil and the guide plate.

[0083] This application is also applicable to push-pull pickling units and leveling units in the non-ferrous metal strip industry. Furthermore, for vertical tension roller equipment, other production fields with each roll threading production method (such as papermaking) can also adopt the one-click threading control concept of this application. In all such cases, the technical solution of this application can be used. The technical solution of this application is not limited to the vertical tension roller equipment itself, but is also applicable to other similar equipment with vertical two rolls that require threading around the roll. This application provides a one-click threading operation mode for a swing-type vertical double-roller equipment. The technical solution of this application can be used in any situation suitable for this application.

[0084] The above description is merely a specific embodiment of this application and should not be construed as limiting the scope of the invention. Therefore, any substitution of equivalent components or equivalent changes and modifications made within the scope of protection of this application should still fall within the scope of this application. Furthermore, the technical features, technical features and technical solutions, and technical solutions in this application can be freely combined and used.

Claims

1. A leveling unit, wherein, The leveling unit includes, from right to left, an uncoiler (2), an uncoiling side guide plate device (3), an uncoiling side tension roller (4), a leveler (5), a winding side tension roller (6), a winding side guide plate device (7), and a winding machine (8); The unwinding side guide plate device (3) includes an unwinding side fixed guide plate (31), which can be raised, lowered and swung. The unwinding side tension roller (4) includes an upper unwinding side roller (41) and a lower unwinding side roller (42) arranged vertically. The lower unwinding side roller (42) can swing to the top or bottom of the upper unwinding side roller (41). When the lower unwinding side roller (42) swings to the upper limit position, an upper unwinding side channel (43) is formed between the upper unwinding side roller (41) and the lower unwinding side roller (42). The take-up side tension roller (6) includes an upper take-up side roller (61) and a lower take-up side roller (62) arranged vertically. The lower take-up side roller (62) can swing to the top or bottom of the upper take-up side roller (61). When the lower take-up side roller (62) swings to the upper limit position, an upper take-up side channel (63) is formed between the upper take-up side roller (61) and the lower take-up side roller (62). The take-up side guide plate device (7) includes a take-up side fixed guide plate (71), which is capable of lifting, lowering and swinging.

2. The leveling unit according to claim 1, wherein, The uncoiling side guide plate device (3) also includes an uncoiling side lifting slider (33), an uncoiling side lifting drive mechanism (38), and an uncoiling side frame column (35). The left end of the uncoiling side fixed guide plate (31) is connected to the upper part of the uncoiling side lifting slider (33) through the uncoiling side upper rotating shaft (34). The uncoiling side fixed guide plate (31) is connected to the lower part of the uncoiling side lifting slider (33) in sequence through the uncoiling side swing hydraulic cylinder (36) and the uncoiling side lower rotating shaft (37). The axis of the uncoiling side upper rotating shaft (34) and the axis of the uncoiling side lower rotating shaft (37) are both Extending along the front-back direction, the uncoiling side lifting drive mechanism (38) enables the uncoiling side lifting slider (33) to move up and down along the uncoiling side frame column (35), the uncoiling side swing hydraulic cylinder (36) enables the uncoiling side fixed guide plate (31) to swing up and down around the uncoiling side upper rotating shaft (34), the uncoiling side fixed guide plate (31) is stacked with the uncoiling side first movable guide plate (32), and the uncoiling side first telescopic mechanism (310) enables the uncoiling side first movable guide plate (32) to extend to the right or retract to the left relative to the uncoiling side fixed guide plate (31).

3. The leveling unit according to claim 2, wherein, When the uncoiling-side fixed guide plate (31) is at its upper limit position, the uncoiling-side lifting slider (33) is at its upper limit position, the uncoiling-side swing hydraulic cylinder (36) is in the extended state, the left end of the uncoiling-side fixed guide plate (31) along the vertical direction is located between the upper end of the uncoiling-side upper roller (41) and the axis of the uncoiling-side upper roller (41), the right end of the uncoiling-side fixed guide plate (31) is lower than the left end of the uncoiling-side fixed guide plate (31), the right end of the uncoiling-side fixed guide plate (31) along the vertical direction is located between the upper end of the uncoiling-side upper roller (41) and the lower end of the uncoiling-side upper roller (41), and the first movable guide plate (32) on the uncoiling side. After extending to the right, the uncoiling side fixed guide plate (31) and the uncoiling side first movable guide plate (32) can guide the lead (101) of the steel coil (10) on the uncoiling machine (2) into the uncoiling side upper channel (43); when the uncoiling side fixed guide plate (31) is in the lower limit position, the uncoiling side lifting slider (33) is in the lower limit position, the uncoiling side swing hydraulic cylinder (36) is in the retracted limit state, the left end of the uncoiling side fixed guide plate (31) is lower than the lower end of the uncoiling side lower roller (42) when it is in the lower limit position, and the right end of the uncoiling side fixed guide plate (31) is lower than the left end of the uncoiling side fixed guide plate (31).

4. The leveling unit according to claim 2, wherein, The unwinding side guide plate device (3) also includes an unwinding side second movable guide plate (39) and an unwinding side second telescopic mechanism (311). The unwinding side second telescopic mechanism (311) is located below the unwinding side fixed guide plate (31). The unwinding side second telescopic mechanism (311) can make the unwinding side second movable guide plate (39) extend to the left or retract to the right relative to the unwinding side fixed guide plate (31). The unwinding side first movable guide plate (32), the unwinding side fixed guide plate (31) and the unwinding side second movable guide plate (39) are stacked sequentially from top to bottom.

5. The leveling unit according to claim 3, wherein, The uncoiling side guide plate device (3) also includes an uncoiling side first proximity switch, an uncoiling side second proximity switch and an uncoiling side third proximity switch. The uncoiling side first proximity switch can detect whether the uncoiling side lifting slider (33) is at the lower limit position. The uncoiling side second proximity switch can detect whether the uncoiling side swing hydraulic cylinder (36) is in the retracted limit state. The uncoiling side third proximity switch can detect whether the uncoiling side first movable guide plate (32) is in the retracted limit state. The uncoiling side tension roller (4) also includes an uncoiling side lower roller locking cylinder, an uncoiling side fourth proximity switch and an uncoiling side fifth proximity switch. The uncoiling side lower roller locking cylinder can lock the uncoiling side lower roller (42) at the lower limit position. The uncoiling side fourth proximity switch can detect whether the uncoiling side lower roller locking cylinder is in the retracted limit state. The uncoiling side fifth proximity switch can detect whether the uncoiling side lower roller (42) is at the lower limit position.

6. The leveling unit according to any one of claims 1 to 5, wherein, The leveling machine (5) includes a leveling roll (51). An inlet photoelectric switch (52) is provided on the outside of the inlet side of the leveling roll (51), and an outlet photoelectric switch (53) is provided on the outside of the outlet side of the leveling roll (51). The inlet photoelectric switch (52) can detect whether the lead (101) of the steel coil (10) has passed through the inlet photoelectric switch (52), and the outlet photoelectric switch (53) can detect whether the lead (101) of the steel coil (10) has passed through the outlet photoelectric switch (53).

7. The leveling unit according to any one of claims 1 to 5, wherein, The take-up side guide plate device (7) also includes a take-up side lifting slider (73), a take-up side lifting drive mechanism (78), and a take-up side frame column (75). The right end of the take-up side fixed guide plate (71) is connected to the upper part of the take-up side lifting slider (73) through the take-up side upper rotating shaft (74). The take-up side fixed guide plate (71) is connected to the lower part of the take-up side lifting slider (73) in sequence through the take-up side swing hydraulic cylinder (76) and the take-up side lower rotating shaft (77). The axis of the take-up side upper rotating shaft (74) and the axis of the take-up side lower rotating shaft (77) are both Extending along the front-back direction, the winding-side lifting drive mechanism (78) enables the winding-side lifting slider (73) to move up and down along the winding-side frame column (75), the winding-side swing hydraulic cylinder (76) enables the winding-side fixed guide plate (71) to swing up and down around the winding-side upper rotating shaft (74), the winding-side fixed guide plate (71) is stacked with the winding-side first movable guide plate (72), and the winding-side first telescopic mechanism (710) enables the winding-side first movable guide plate (72) to extend to the left or retract to the right relative to the winding-side fixed guide plate (71).

8. The leveling unit according to claim 7, wherein, When the winding-side fixed guide plate (71) is at its upper limit position, the winding-side lifting slider (73) is also at its upper limit position, and the winding-side swing hydraulic cylinder (76) is in the extended state. The right end of the winding-side fixed guide plate (71) is located between the upper end of the winding-side upper roller (61) and the axis of the winding-side upper roller (61) in the vertical direction. The left end of the winding-side fixed guide plate (71) is lower than the right end. After the first movable guide plate (72) of the winding side extends to the left, the winding-side fixed guide plate (71) and the first movable guide plate (72) of the winding side... The plate (72) can guide the lead (101) of the steel coil (10) output from the upper channel (63) on the winding side to the inlet of the coiler (8); when the fixed guide plate (71) on the winding side is in the lower limit position, the lifting slider (73) on the winding side is in the lower limit position, the swing hydraulic cylinder (76) on the winding side is in the retracted limit state, the right end of the fixed guide plate (71) on the winding side is lower than the lower end of the lower roller (62) on the winding side when it is in the lower limit position, and the left end of the fixed guide plate (71) on the winding side is lower than the right end of the fixed guide plate (71) on the winding side.

9. The leveling unit according to claim 7, wherein, The take-up side guide plate device (7) also includes a second movable guide plate (79) on the take-up side and a second telescopic mechanism (711) on the take-up side. The second telescopic mechanism (711) on the take-up side is located below the fixed guide plate (71) on the take-up side. The second telescopic mechanism (711) on the take-up side can extend the second movable guide plate (79) on the take-up side to the right or retract it to the left relative to the fixed guide plate (71) on the take-up side. The second movable guide plate (79), the fixed guide plate (71), and the first movable guide plate (72) on the take-up side are stacked sequentially from top to bottom.

10. The leveling unit according to claim 8, wherein, The take-up side guide plate device (7) also includes a take-up side first proximity switch, a take-up side second proximity switch and a take-up side third proximity switch. The take-up side first proximity switch can detect whether the take-up side lifting slider (73) is at the lower limit position. The take-up side second proximity switch can detect whether the take-up side swing hydraulic cylinder (76) is in the retracted limit state. The take-up side third proximity switch can detect whether the take-up side first movable guide plate (72) is in the retracted limit state. The take-up side tension roller (6) also includes a take-up side lower roller locking cylinder, a take-up side fourth proximity switch and a take-up side fifth proximity switch. The take-up side lower roller locking cylinder can lock the take-up side lower roller (62) at the lower limit position. The take-up side fourth proximity switch can detect whether the take-up side lower roller locking cylinder is in the retracted limit state. The take-up side fifth proximity switch can detect whether the take-up side lower roller (62) is at the lower limit position.

11. The leveling unit according to any one of claims 1 to 5, wherein, The leveling unit also includes a preparation station (1) and a coil transport car (9). The preparation station (1) contains a ground roller (11). The preparation station (1) is located on the right side of the uncoiler (2). The coil transport car (9) can transport the steel coil (10) on the ground roller (11) to the uncoiler (2). The coil transport car (9) can also remove the steel coil (10) from the coiler (8).

12. A method of operating the leveling unit according to any one of claims 1 to 11, wherein, Includes the following steps: Step 1: Preparation; Step 2: Transport the steel coil (10) to the uncoiler (2), with the lower uncoiler (42) of the tension roller (4) on the uncoiler side in the upper limit position and the fixed guide plate (31) on the uncoiler side in the upper limit position. Step 3: The uncoiler (2) operates, causing the strip (101) of the steel coil (10) to pass through the fixed guide plate (31) on the uncoiling side, the upper channel (43) on the uncoiling side, and the roll gap (54) of the leveler (5) in sequence. The roll gap (54) of the leveler (5) closes and clamps the steel strip (102). Step 4: Apply rolling force to the leveling rolls (51) of the leveling machine (5), start the drive motor of the leveling machine (5), and establish tension on the steel strip (102) between the leveling machine (5) and the uncoiler (2); Step 5: The uncoiling side fixed guide plate (31) moves to the lower limit position, and then the uncoiling side lower roller (42) of the uncoiling side tension roller (4) swings to the lower limit position; Step 6: The lower roll (62) on the winding side of the tension roller (6) is in the upper limit position, and the fixed guide plate (71) on the winding side is in the upper limit position. Step 7: The uncoiler (2), the uncoiling side tension roller (4), the leveler (5), the winding side tension roller (6) and the coiler (8) operate at the same threading speed. The lead (101) of the steel coil (10) enters the coiler (8) and tension is established on the steel strip (102) between the coiler (8) and the leveler (5). Step 8: The winding-side fixed guide plate (71) moves to the lower limit position, and then the winding-side lower roller (62) of the winding-side tension roller (6) swings to the lower limit position.

13. The working method of the leveling unit according to claim 12, wherein, The lower roller (42) on the unwinding side can only swing downward when the first proximity switch on the unwinding side detects that the lifting slider (33) on the unwinding side is at the lower limit position, the second proximity switch on the unwinding side detects that the swing hydraulic cylinder (36) on the unwinding side is at the retracted limit state, and the third proximity switch on the unwinding side detects that the first movable guide plate (32) on the unwinding side is at the retracted limit state. The lower roller locking cylinder can only lock the lower roller (42) when the fifth proximity switch on the unwinding side detects that the lower roller (42) on the unwinding side is in the lower limit position. Only when the second proximity switch on the uncoiling side detects that the uncoiling side swing hydraulic cylinder (36) is in the retraction limit state and the third proximity switch on the uncoiling side detects that the first movable guide plate (32) on the uncoiling side is in the retraction limit state can the coil carrier (9) place the steel coil (10) onto the uncoiling machine (2).

14. The working method of the leveling unit according to claim 12, wherein, The lower roller (62) on the winding side can only swing downward when the first proximity switch on the winding side detects that the lifting slider (73) on the winding side is at its lower limit position, the second proximity switch on the winding side detects that the swing hydraulic cylinder (76) on the winding side is at its retracted limit state, and the third proximity switch on the winding side detects that the first movable guide plate (72) on the winding side is at its retracted limit state. The lower roller locking cylinder can only lock the lower roller (62) when the fifth proximity switch on the winding side detects that the lower roller (62) on the winding side is in the lower limit position. Only when the second proximity switch on the winding side detects that the swing hydraulic cylinder (76) on the winding side is in the retraction limit state and the third proximity switch on the winding side detects that the first movable guide plate (72) on the winding side is in the retraction limit state can the transport car (9) remove the steel coil (10) on the winding machine (8).

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