Leveling unit and working method thereof

Abstract

The invention discloses a temper mill unit and a working method thereof, belongs to the technical field of steel and non-ferrous metal plate strip machining, and aims to solve the problem that in the prior art, strip steel is prone to jamming when strip heads penetrate through all devices. The flattening unit comprises an uncoiling machine (2), an uncoiling side guide plate device (3), an uncoiling side tension roller (4), a flattening machine (5), a coiling side tension roller (6), a coiling side guide plate device (7) and a coiling machine (8) which are sequentially arranged from right to left. The lower roller of the uncoiling side tension roller and the lower roller of the coiling side tension roller in the temper mill unit can swing up and down, the smoothness and the automation degree of strip threading are improved, the passing ability of strip threading can be greatly improved, and therefore the auxiliary production time is saved, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel and nonferrous metal plate and strip processing, in particular to a leveling machine unit and a working method of the leveling machine unit. Background Art

[0002] In order to improve the unit's completion rate and save investment, the offline skin-pass mill adopts a single-coil production mode rather than a continuous production mode when designing the unit. This so-called single-coil production mode takes one steel coil as the production cycle, and each coil repeats the steps of coiling → threading → sheet building → skin-pass rolling → deceleration and shutdown → coil unloading → coiling... Therefore, the most difficult problem encountered by the offline flattening single-coil production mode is how to shorten the auxiliary time and ensure the smoothness of each strip threading within the limited auxiliary time. This is also a world-class problem, because the steel coils produced by the flattening machine unit are all annealed steel coils, and the strip is relatively soft. On the other hand, after cold rolling production, the strip is relatively thin, and the thickness of the strip is as low as 0.17mm or even thinner. This soft and thin strip will be unable to move forward if there is a slight obstruction when the strip head passes through various equipment. When the thin material requires small tension uncoiling and coiling and chooses to go down the channel to serpentine and pass through the vertical tension roller, the strip head will be stuck at the entry and exit tension rollers. The situation is more serious. This is also a domestic and international industry problem encountered by the current plate and strip materials in the flattening production link.

[0003] To sum up, how to ensure the passability of belt threading in the 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 plagues the production of leveling units. Although some auxiliary belt threading guides or devices have been proposed in the prior art to improve the problem of belt threading jamming, the smoothness of the tension roller threading and the passability of the auxiliary belt threading have not been fundamentally solved, which greatly affects the production efficiency of the leveling unit. Summary of the invention

[0004] In order to solve the problem that the above-mentioned strip steel is easily stuck when the strip head passes through various equipment, the present invention provides a leveling machine unit and a working method thereof, in which the lower roller of the tension roller on the unwinding side and the lower roller of the tension roller on the winding side in the leveling machine unit can swing up and down, thereby improving the smoothness and automation of the strip threading, and can greatly improve the passability of the strip threading, thereby saving auxiliary production time and improving production efficiency.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A leveling machine unit comprises an uncoiler, an uncoiler side guide device, an uncoiler side tension roller, a leveling machine, a winding side tension roller, a winding side guide device and a winding machine, which are arranged in sequence from right to left; the uncoiler side guide device contains a fixed uncoiler side guide, which can be raised and lowered and swung; the uncoiler side tension roller contains an upper uncoiler side roller and a lower uncoiler side roller arranged up and down, the lower uncoiler side roller can swing to the top or bottom of the upper uncoiler side roller, and when the lower uncoiler side roller swings to the upper limit position, an upper uncoiler side channel is formed between the upper uncoiler side roller and the lower uncoiler side roller; the winding side tension roller contains an upper winding side roller and a lower winding side roller arranged up and down, the lower winding side roller can swing to the top or bottom of the upper winding side roller, and when the lower winding side roller swings to the 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 device contains a fixed winding side guide, and the fixed winding side guide can be raised and lowered and swung.

[0007] A working method of the above-mentioned leveling unit comprises the following steps in sequence:

[0008] Step 1: Preparation;

[0009] Step 2: transport the steel coil to the uncoiler, the lower roller of the uncoiler side tension roller is located at the upper limit position, and the fixed guide plate of the uncoiler side is located at the upper limit position;

[0010] Step 3, the uncoiler is operated, so that the strip head of the steel coil passes through the fixed guide plate on the uncoiler side, the upper channel on the uncoiler side and the roller gap of the leveler in sequence, and the roller gap of the leveler is closed to clamp the steel strip;

[0011] Step 4: Apply rolling force to the leveling roller of the leveling mill, start the transmission motor of the leveling mill, and build tension on the steel strip between the leveling mill and the uncoiler;

[0012] Step 5: The fixed guide plate on the unwinding side moves to the lower limit position, and then the lower roller on the unwinding side of the tension roller on the unwinding side swings to the lower limit position;

[0013] Step 6: The winding side lower roller of the winding side tension roller is located at the upper limit position, and the winding side fixed guide plate is located at the upper limit position;

[0014] Step 7: The unwinder, the tension roller on the unwinding side, the leveler, the tension roller on the winding side and the coiler are operated at the threading speed at the same time, the head of the steel coil enters the coiler, and tension is established on the steel strip between the coiler and the leveler;

[0015] Step 8: The fixed guide plate on the winding side moves to the lower limit position, and then the winding side lower roller of the winding side tension roller swings to the lower limit position.

[0016] The beneficial effects of the present invention are:

[0017] 1. In the prior art, either an auxiliary threading mechanism is added to the tension roller or the program is optimized in the electrical control, which cannot fundamentally solve the problem of the belt head getting stuck when passing through the tension roller in an "S-shape" under the condition of no traction during threading. The present invention starts from three aspects at the same time: the production process of the entire leveling unit, the innovation of the equipment structure and the electrical automatic control, and realizes one-button full-automatic control of the threading process, which saves production auxiliary time and improves labor efficiency.

[0018] 2. The traditional idea of ​​winding around the vertical tension roller for each roll is completely abandoned. The lower roller of the tension roller is rotated and swung around the upper roller to lift. After the strip passes through the upper roller, the lower roller drives the strip to swing back to the lower position. In addition, an integral lifting and threading guide plate is proposed to match this swinging tension roller. The swing and telescopic mechanism of the guide plate is installed on the integral lifting platform to avoid the swing interference of the tension roller. In this way, the problem of the strip passing through the tension roller without traction is avoided from the perspective of equipment structure.

[0019] 3. In order to realize one-key threading, the current leveling unit equipment configuration is built by adding detection of component monitoring and the logical sequence of each equipment action, and building a one-key threading automatic control program. The action interlocking condition is established by detecting the signal and the current signal status to avoid equipment collision, realize the intelligent one-key threading mode, and save labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0021] Figure 1 It is an overall schematic diagram of the leveling machine unit described in the present invention.

[0022] Figure 2 It is a schematic diagram when the lower roller on the unwinding side swings to the upper limit position and the fixed guide plate on the unwinding side is at the upper limit position.

[0023] Figure 3 It is a schematic diagram when the lower roller on the unwinding side swings to the lower limit position and the fixed guide plate on the unwinding side is at the lower limit position.

[0024] Figure 4 It 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 at the upper limit position.

[0025] Figure 5 It 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 at the lower limit position.

[0026] Figure 6 It is a schematic diagram of the unwinding side guide device.

[0027] Figure 7 It is a schematic diagram of the unwinding side guide device including the second movable guide on the unwinding side.

[0028] Figure 8 It is a schematic diagram of the winding side guide device.

[0029] Fig. 9 It is a schematic diagram of the steel coil on the ground roller.

[0030] Fig.10 It is a schematic diagram of the three-roll straightening machine processing the strip head.

[0031] Description of reference numerals:

[0032] 1. Preparation station; 2. Uncoiler; 3. Uncoil side guide device; 4. Uncoil side tension roller; 5. Leveler; 6. Winding side tension roller; 7. Winding side guide device; 8. Winder; 9. Coil transport vehicle; 10. Steel coil;

[0033] 11. Ground roller; 12. Three-roller straightening machine;

[0034] 31. Fixed guide plate on unwinding side; 32. First movable guide plate on unwinding side; 33. Lifting slide block on unwinding side; 34. Upper rotating shaft on unwinding side; 35. Frame column on unwinding side; 36. Swinging hydraulic cylinder on unwinding side; 37. Lower rotating shaft on unwinding side; 38. Lifting drive mechanism on unwinding side; 39. Second movable guide plate on unwinding side; 310. First telescopic mechanism on unwinding side; 311. Second telescopic mechanism on unwinding side;

[0035] 41. Upper roller on the unwinding side; 42. Lower roller on the unwinding side; 43. Upper channel on the unwinding side;

[0036] 51. Leveling roller; 52. Entrance photoelectric switch; 53. Exit photoelectric switch; 54. Roller gap;

[0037] 61. Upper roller on the winding side; 62. Lower roller on the winding side; 63. Upper channel on the winding side;

[0038] 71. Fixed guide plate on winding side; 72. First movable guide plate on winding side; 73. Lifting slider on winding side; 74. Upper rotating shaft on winding side; 75. Frame column on winding side; 76. Swinging hydraulic cylinder on winding side; 77. Lower rotating shaft on winding side; 78. Lifting drive mechanism on winding side; 79. Second movable guide plate on winding side; 710. First telescopic mechanism on winding side; 711. Second telescopic mechanism on winding side;

[0039] 101. Lead; 102. Steel belt. DETAILED DESCRIPTION

[0040] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0041] For the convenience of understanding and description, the following description of the present invention adopts an absolute position relationship. Without special explanation, the orientation word "upper" herein represents Figure 1 the upper side direction in Figure 1 it, the orientation word "lower" represents Figure 1 the lower side direction in Figure 1 it, the orientation word "left" represents Figure 1 the left side direction in Figure 1 it, the orientation word "right" represents

[0042] As Figures 1 to 8 shown, a leveler unit according to an embodiment of the present invention includes an uncoiler 2, an uncoiler side guide device 3, an uncoiler side tension roller 4, a leveler 5, a coiler side tension roller 6, a coiler side guide device 7, and a coiler 8, which are arranged in sequence from right to left; the uncoiler side guide device 3 includes an uncoiler side fixed guide 31, and the uncoiler side fixed guide 31 can be lifted and swung; the uncoiler side tension roller 4 includes an upper uncoiler side roller 41 and a lower uncoiler side roller 42 arranged up and down, and the lower uncoiler side roller 42 can swing above or below the upper uncoiler side roller 41. When the lower uncoiler side roller 42 swings to the upper limit position, an upper uncoiler side channel 43 is formed between the upper uncoiler side roller 41 and the lower uncoiler side roller 42; the coiler side tension roller 6 includes an upper coiler side roller 61 and a lower coiler side roller 62 arranged up and down, and the lower coiler side roller 62 can swing above or below the upper coiler side roller 61. When the lower coiler side roller 62 swings to the upper limit position, an upper coiler side channel 63 is formed between the upper coiler side roller 61 and the lower coiler side roller 62; the coiler side guide device 7 includes a coiler side fixed guide 71, and the coiler side fixed guide 71 can be lifted and swung.

[0043] As Figure 6As shown, the unwinding side guide plate device 3 also includes an unwinding side lifting slider 33, an unwinding side lifting drive mechanism 38 and an unwinding side frame column 35. The two unwinding side lifting sliders 33 and the two unwinding side frame columns 35 are arranged at intervals in front and back. The unwinding side lifting slider 33 is a vertical block structure, and the unwinding side frame column 35 is a vertical column structure. The upper and lower ends of the two unwinding side frame columns 35 are connected and fixed by a cross beam. The unwinding side lifting drive mechanism 38 can drive the unwinding side lifting slider 33 to move up and down along the unwinding side frame column 35. The lifting drive mechanism can include a motor, a coupling, a connecting shaft, a gear and a rack connected in sequence. The rack and the unwinding side lifting slider 33 can be fixed by bolts, and the motor is installed on the unwinding side frame.

[0044] The left end of the unwinding side fixed guide plate 31 is connected to the upper part of the unwinding side lifting slider 33 through the unwinding side upper rotating shaft 34, the unwinding side upper rotating shaft 34 passes through the two unwinding side lifting sliders 33, the unwinding side fixed guide plate 31 is connected to the lower part of the unwinding side lifting slider 33 through the unwinding side swing hydraulic cylinder 36 and the unwinding side lower rotating shaft 37 in turn, the unwinding side lower rotating shaft 37 passes through the two unwinding side lifting sliders 33, the unwinding side upper rotating shaft 34 and the unwinding side lower rotating shaft 37 are arranged at intervals up and down, and the axis of the unwinding side upper rotating shaft 34 and the axis of the unwinding side lower rotating shaft 37 are both along the front-to-back direction The unwinding side swing hydraulic cylinder 36 is extended, and both ends of the unwinding side swing hydraulic cylinder 36 are respectively hinged with the unwinding side fixed guide plate 31 and the unwinding side lower rotating shaft 37, the unwinding side swing hydraulic cylinder 36 is located below the unwinding side fixed guide plate 31, and the unwinding side swing hydraulic cylinder 36 can drive the unwinding side fixed guide plate 31 to swing up and down around the unwinding side upper rotating shaft 34, the unwinding side fixed guide plate 31 is stacked and connected with the first unwinding side movable guide plate 32, the unwinding side first telescopic mechanism 310 can make the unwinding side first movable guide plate 32 extend to the right or retract to the left, and the unwinding side first telescopic mechanism 310 can be a hydraulic cylinder.

[0045] like Figures 2 to 3As shown in the figure, when the unwinding side fixed guide plate 31 is located at the upper limit position, the unwinding side lifting slider 33 is located at the upper limit position, the unwinding side swing hydraulic cylinder 36 is in an extended state, and the left end of the unwinding side fixed guide plate 31 is located between the upper end of the unwinding side upper roller 41 and the axis of the unwinding side upper roller 41 in the up-down direction, and the right end of the unwinding side fixed guide plate 31 is lower than the left end of the unwinding side fixed guide plate 31, and the right end of the unwinding side fixed guide plate 31 is located between the upper end of the unwinding side upper roller 41 and the lower end of the unwinding side upper roller 41 in the up-down direction, and the first movable guide plate 31 on the unwinding side is in a state of being extended. After the plate 32 extends to the right, the fixed guide plate 31 on the uncoiling side and the first movable guide plate 32 on the uncoiling side can guide the lead 101 of the steel coil 10 on the uncoiler 2 to the upper channel 43 on the uncoiling side; when the fixed guide plate 31 on the uncoiling side is at the lower limit position, the lifting slider 33 on the uncoiling side is at the lower limit position, the swing hydraulic cylinder 36 on the uncoiling side is in the retracted limit state, the left end of the fixed guide plate 31 on the uncoiling side is lower than the lower end of the lower roller 42 on the uncoiling side when it is at the lower limit position, and the right end of the fixed guide plate 31 on the uncoiling side is lower than the left end of the fixed guide plate 31 on the uncoiling side.

[0046] like Figure 7 As shown, when the steel strip is thin, in order to better guide the steel strip head between the tension roller and the guide device, the unwinding side guide device 3 may also include a second unwinding side movable guide plate 39 and a second unwinding side telescopic mechanism 311. The second unwinding side telescopic mechanism 311 is located below the unwinding side fixed guide plate 31. The second unwinding side telescopic mechanism 311 may use a hydraulic cylinder. The second unwinding side telescopic mechanism 311 can make the second unwinding side movable guide plate 39 extend to the left or retract to the right relative to the unwinding side fixed guide plate 31. In order to prevent the steel strip head from being stuck at the overlap of the first unwinding side movable guide plate 32, the unwinding side fixed guide plate 31 and the second unwinding side movable guide plate 39, the first unwinding side movable guide plate 32, the unwinding side fixed guide plate 31 and the second unwinding side movable guide plate 39 are stacked in sequence from top to bottom.

[0047] The unwinding side guide device 3 also includes a first unwinding side proximity switch, a second unwinding side proximity switch and a third unwinding side proximity switch. The first unwinding side proximity switch can detect whether the unwinding side lifting slider 33 is at the lower limit position, and the first unwinding side proximity switch can be set on the unwinding side frame column 35. The second unwinding side proximity switch can detect whether the unwinding side swing hydraulic cylinder 36 is in the retracted limit state (i.e., position), and the second unwinding side proximity switch can be set on the cylinder barrel of the unwinding side swing hydraulic cylinder 36. The third unwinding side proximity switch can detect whether the first movable guide plate 32 on the unwinding side is in the retracted limit state (i.e., position), and the third unwinding side proximity switch can be set on the unwinding side fixed guide plate 31.

[0048] The unwinding side tension roller 4 can adopt the Chinese invention CN117696646A, which was published on March 15, 2024, and disclosed a "Leveling machine entrance and exit vertical tension roller, leveling machine unit and belt threading method". The unwinding side tension roller 4 also contains an unwinding side lower roller locking cylinder, an unwinding side fourth proximity switch and an unwinding side fifth proximity switch. The unwinding side lower roller locking cylinder can lock the unwinding side lower roller 42 in the lower limit position, the unwinding side fourth proximity switch can detect whether the unwinding side lower roller locking cylinder is in the retracted limit state, and the unwinding side fifth proximity switch can detect whether the unwinding side lower roller 42 is in the lower limit position.

[0049] 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. In order to make the first movable guide plate 32 on the unwinding side and the second movable guide plate 39 on the unwinding side stably and reliably extend and retract, the front and rear ends of the fixed guide plate 31 on the unwinding side are both provided with slide grooves, for example, the right side of the front and rear ends of the fixed guide plate 31 on the unwinding side is provided with a first slide groove, and the left side of the front and rear ends of the fixed guide plate 31 on the unwinding side is provided with a second slide groove, and the front and rear ends of the first movable guide plate 32 on the unwinding side are matched and plugged into the first slide groove, and the front and rear ends of the second movable guide plate 39 on the unwinding side are matched and plugged into the second slide 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 the retracted limit state (i.e., position).

[0050] like Figure 1 As shown, the leveling machine 5 includes a leveling roller 51, a roller gap 54 is formed between the upper leveling roller 51 and the lower leveling roller 51, an entrance photoelectric switch 52 is arranged outside the entrance side of the leveling roller 51, and an exit photoelectric switch 53 is arranged outside the exit side of the leveling roller 51. The entrance photoelectric switch 52 can detect whether the head 101 of the steel coil 10 passes through the entrance photoelectric switch 52, and the exit photoelectric switch 53 can detect whether the head 101 of the steel coil 10 passes through the exit photoelectric switch 53. The roller gap 54, the upper channel 43 on the unwinding side, and the upper channel 63 on the winding side are approximately located at the same level.

[0051] like Figure 8As shown, the structure of the winding side guide plate device 7 is basically the same as that of the unwinding side guide plate device 3. The winding side guide plate device 7 also includes a winding side lifting slider 73, a winding side lifting drive mechanism 78 and a winding side frame column 75. The right end of the winding side fixed guide plate 71 is connected to the upper part of the winding side lifting slider 73 through the winding side upper rotating shaft 74. The winding side fixed guide plate 71 is connected to the lower part of the winding side lifting slider 73 through the winding side swing hydraulic cylinder 76 and the winding side lower rotating shaft 77 in turn. The axis of the winding side upper rotating shaft 74 and the winding side lower rotating shaft 77 are connected. The axes of the winding side extend in the front-to-back direction, the winding side lifting drive mechanism 78 can make the winding side lifting slider 73 move up and down along the winding side frame column 75, the winding side swing hydraulic cylinder 76 can drive 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 and connected with the winding side first movable guide plate 72, and the winding side first telescopic mechanism 710 can make the winding side first movable guide plate 72 extend to the left or retract to the right.

[0052] like Figures 4 to 5 As shown in the figure, when the winding side fixed guide plate 71 is at the upper limit position, the winding side lifting slider 73 is at the upper limit position, the winding side swing hydraulic cylinder 76 is in the extended state, and 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 up and down direction, and the left end of the winding side fixed guide plate 71 is lower than the right end of the winding side fixed guide plate 71, and after the winding side first movable guide plate 72 is extended to the left, the winding side fixed guide plate 71 and the winding side first movable guide plate 72 are connected. A movable guide plate 72 can guide the lead 101 of the steel coil 10 output from the upper channel 63 on the winding side to the entrance of the coiler 8; when the fixed guide plate 71 on the winding side is at the lower limit position, the lifting slider 73 on the winding side is at 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 at 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.

[0053] The winding side guide plate device 7 also includes a first winding side proximity switch, a second winding side proximity switch and a third winding side proximity switch. The first winding side proximity switch can detect whether the winding side lifting slider 73 is located at the lower limit position, the second winding side proximity switch can detect whether the winding side swing hydraulic cylinder 76 is in the retraction limit state, and the third winding side proximity switch can detect whether the first movable guide plate 72 on the winding side is in the retraction limit state.

[0054] The structure of the winding side tension roller 6 and the structure of the unwinding side tension roller 4 can be the same, and the winding side tension roller 6 and the unwinding side tension roller 4 are symmetrical and mirror images of each other. The winding side tension roller 6 also contains a winding side lower roller locking cylinder, a winding side fourth proximity switch and a winding side fifth proximity switch. The winding side lower roller locking cylinder can lock the winding side lower roller 62 at the lower limit position, the winding side fourth proximity switch can detect whether the winding side lower roller locking cylinder is in the retracted limit state, and the winding side fifth proximity switch can detect whether the winding side lower roller 62 is at the lower limit position.

[0055] like Figure 8 As shown, when the steel strip is thin, in order to better guide the steel strip head between the tension roller and the guide device, the winding side guide device 7 may also include a second winding side movable guide 79 and a second winding side telescopic mechanism 711. The second winding side telescopic mechanism 711 is located below the winding side fixed guide 71. The second winding side telescopic mechanism 711 may be a hydraulic cylinder. The second winding side telescopic mechanism 711 can make the second winding side movable guide 79 extend to the right or retract to the left relative to the winding side fixed guide 71. In order to prevent the steel strip head from being stuck at the overlap of the second winding side movable guide 79, the winding side fixed guide 71 and the winding side first movable guide 72, the winding side second movable guide 79, the winding side fixed guide 71 and the winding side first movable guide 72 are stacked in sequence from top to bottom.

[0056] like Figure 1 , Fig. 9 and Fig.10 As shown, the leveling unit also includes a preparation station 1 and a coil transporter 9, and both the preparation station 1 and the coil transporter 9 can be products of existing technology. The preparation station 1 is set outside the line, relatively independent of the main line of the leveling unit, and is used to process the strip head, remove the steel coil strapping, and inspect the strip steel when the unit is in normal production. For this reason, the preparation station is generally equipped with a dedicated person for manual operation and inspection. The preparation station 1 contains a ground roller 11 and a three-roller straightening machine 12. The preparation station 1 is located on the right side of the uncoiler 2. The coil transporter 9 can transport the steel coil 10 on the ground roller 11 to the uncoiler 2, and the coil transporter 9 can also take away the steel coil 10 on the coiler 8. The coiler 8 can move left and right.

[0057] The working method of the above-mentioned leveling unit is introduced below. The working method completes the strip head threading from the uncoiler 2 → the tension roller 4 on the uncoiling side → the leveling machine 5 → the tension roller 6 on the winding side → the coiler 8. The strip threading can be automatically completed without manual intervention. The working method includes the following steps in sequence:

[0058] Step 1: Preparation;

[0059] In order to realize the automation of the strip threading process, firstly, the strip head 101 of the processed steel coil 10 is positioned in the preparation station 1, and the strip head 101 is subjected to a certain head warping treatment by a three-roll straightening machine, and the strip head 101 is made into a flat section from a curved surface section. The size of the head warping is related to the straightening roller diameter, roller pitch, straightening roller pressure, and strip thickness so that the strip head can be inserted into the equipment gap during subsequent strip threading. After the straightening and head cutting of the steel coil are completed, the steel coil needs to be rotated and the strip head stopped at Fig. 9 and Fig.10 The angle a shown in the figure is used to ensure that the leading direction of each steel coil is at the same angle (high accuracy is not required) when the coil loading trolley takes the coil from the preparation station. This angle is set to a fixed value in the electrical program.

[0060] Step 2, the steel coil 10 is transported to the uncoiler 2, the uncoiler side lower roller 42 of the uncoiler side tension roller 4 is located at the upper limit position, the uncoiler side fixed guide plate 31 is located at the upper limit position, and the uncoiler side first movable guide plate 32 is at the limit position extending to the right, that is, the uncoiler side fixed guide plate 31 and the uncoiler side first movable guide plate 32 are in the working position;

[0061] When the coil transporter 9 transports the steel coil 10 from the preparation station to the uncoiler 2, the unit's electronic control system receives the increase in diameter of the uncoiler 2, and the hydraulic cylinder of the coil transporter moves downward. After the action is completed, the threading begins. At this time, the lower roller 42 on the uncoiler side swings upward, and the fixed guide plate 31 on the uncoiler side and the first movable guide plate 32 on the uncoiler side move to the working position; to save time, this action can be completed before the steel coil is rolled up. After the fixed guide plate 31 on the uncoiler side reaches the upper limit position, the proximity switch receives a signal, and the fixed guide plate 31 on the uncoiler side and the first movable guide plate 32 on the uncoiler side can calculate the swing angle and extension length according to the coil diameter. The action of the swing hydraulic cylinder 36 on the uncoiler side and the telescopic hydraulic cylinder on the uncoiler side can be monitored by the displacement sensor.

[0062] Step 3, the uncoiler 2 works, so that the strip head 101 of the steel coil 10 passes through the uncoiler side fixed guide plate 31, the uncoiler side upper channel 43 and the roller gap 54 of the leveler 5 in sequence. When the strip head 101 passes through the roller gap 54, the roller gap 54 of the leveler 5 closes and clamps the steel strip 102;

[0063] When the unwinding side guide device 3 has completed the operation, the uncoiler 2 reverses (rotates clockwise) the steel coil 10 according to the position of the strip head 101, rotates the strip head 101 to the unwinding position of the unwinding side guide device 3, and then the uncoiler 2 rotates forward (counterclockwise) the steel coil 10, and pushes the strip head 101 into the unwinding side upper channel 43 and the roller gap 54 along the unwinding side fixed guide plate 31 and the first movable guide plate 32 of the unwinding side guide device 3. At this time, the entrance photoelectric switch 52 records the position of the strip head 101, and the electronic control system automatically calculates according to the unwinding speed. When the strip head 101 passes through the roller gap 54 of the leveling machine, the roller gap 54 of the leveling machine closes and presses down to clamp the steel strip 102.

[0064] Step 4: applying a rolling force to the leveling roller 51 of the leveling mill 5, starting the transmission motor of the leveling mill 5, and establishing tension on the steel strip 102 between the leveling mill 5 and the uncoiler 2;

[0065] After the roll gap 54 of the leveling machine is closed, a small rolling force of a certain magnitude is applied to the leveling roller 51 through the AGC cylinder of the leveling machine 5 , and the transmission motor of the leveling machine 5 is started to establish tension on the steel strip 102 between the leveling machine 5 and the uncoiler 2 .

[0066] Step 5: The unwinding side fixed guide plate 31 moves to the lower limit position, and then the unwinding side lower roller 42 of the unwinding side tension roller 4 swings to the lower limit position;

[0067] After the steel strip is established at the entrance, the fixed guide plate 31 on the unwinding side moves to the lower limit position, the first movable guide plate 32 on the unwinding side is in the limit position retracted to the left and waits, and then the lower roller 42 on the unwinding side swings down to the lower limit position with the steel strip 102, automatically completing the S-shaped curve detour of the steel strip 102, the fifth proximity switch on the unwinding side receives a signal, the lower roller locking cylinder on the unwinding side locks the lower roller 42 on the unwinding side, and the fourth proximity switch on the unwinding side receives a signal. At this time, the automatic belt threading on the entrance side is completed.

[0068] Step 6, the winding side lower roller 62 of the winding side tension roller 6 is located at the upper limit position, the winding side fixed guide plate 71 is located at the upper limit position, and the winding side first movable guide plate 72 is at the limit position extending to the left, that is, the winding side fixed guide plate 71 and the winding side first movable guide plate 72 are in the working position;

[0069] The exit photoelectric switch 53 is used to detect the position of the tape head 101. After receiving the signal from the switch, the electronic control system can accurately calculate the time when the tape head enters the coiler 8. When the tape is threaded on the entrance side, the lower roller 62 of the tension roller 6 on the coiler side can swing to the upper limit position, and the fixed guide plate 71 on the coiler side can run to the upper limit position. Since the reel diameter of the exit coiler 8 is usually only 420mm, 508mm, and 610mm, the upper limit position of the fixed guide plate 71 on the coiler side can also be set to three correspondingly, and can automatically swing to the working position according to the diameter of the reel.

[0070] Step 7, the uncoiler 2, the tension roller 4 on the uncoiler side, the leveler 5, the tension roller 6 on the winding side and the coiler 8 are operated at the threading speed at the same time, the strip head 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;

[0071] When the fixed guide plate 71 on the winding side is at the upper limit position and the first movable guide plate 72 on the winding side is at the limit position extended to the left, after the entrance completes the belt threading, the uncoiler 2, the uncoiler side tension roller 4, the leveling machine 5, the winding side tension roller 6 and the winder 8 simultaneously operate at the belt threading speed. At this time, the transmission of the leveling machine 5 is set to the clamping roller clamping working mode to assist the belt threading. When the steel strip 102 enters the winder 8 and is wound for 3 to 5 turns, tension is established on the steel strip 102 between the winder 8 and the leveling machine 5.

[0072] 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;

[0073] The fixed guide plate 71 on the winding side moves to the lower limit position, and the first movable guide plate 72 on the winding side retracts to the right to the limit position and waits. After the proximity switches of each state receive signals, the winding side lower roller 62 of the winding side tension roller 6 swings down to the lower limit position with the steel strip 102, and the fifth proximity switch on the winding side receives a signal to automatically complete the S-shaped curve detour of the strip. The locking hydraulic cylinder of the winding side tension roller 6 locks the winding side lower roller 62, and the fourth proximity switch on the winding side receives a signal. At this time, the entire leveling unit has completed the belt threading, and the unit can enter normal production status.

[0074] The present invention optimizes the one-touch tape threading equipment and method. To ensure the passability of tape threading, the traditional tape threading method, that is, the tape head snakes around the lower roller in an "S-shaped" manner and passes from the lower roller to the upper roller surface, is difficult to achieve. The risk of blocking for soft and thin tapes is very high, and manual intervention wastes operating time and affects efficiency. Therefore, to ensure the smoothness of tape threading, it is necessary to fundamentally eliminate the action of the tape head snake-shaped around the vertical tension roller. For this purpose, the present invention proposes a tape threading guide plate equipment and method with a swinging tension roller and a single-channel and double-channel integral lifting structure.

[0075] First, before threading, the inlet and outlet threading guide plate sinks the entire guide plate to the lower limit position through the overall lifting mechanism (hydraulic cylinder or motor rotating synchronous lifting mechanism) to avoid the interference of the rotation and swinging space of the lower roller of the tension roller. This position (including the overall lifting, swinging and telescopic of the guide plate) is set with a proximity switch as a waiting position for detecting the threading guide plate. At this time, the lower roller of the tension roller can rotate and swing upward to the oblique upper side of the upper roller of the tension roller. In this state, the threading guide plate is raised to the upper channel position as a whole, and then the swing cylinder is swung up. The swing angle is determined according to the displacement sensor and the electrical record of the steel coil diameter. Finally, the telescopic guide plate is extended by the calculated displacement under the drive of the telescopic cylinder. In this way, the guide plate builds the upper channel between the unwinder and the upper surface of the tension roller, and the belt head can enter the upper roller surface of the tension roller along the threading guide plate channel. When the unwinder and the leveler establish tension, the unwinding threading guide plate can be retracted, swung down, and dropped to the initial test position in sequence. When the incoming material is relatively thick and the tension roller does not need to be involved in the work, the lower roller of the tension roller is in the upper limit position and does not move, the motor does not need to be driven, and the upper roller is used as a steering roller, and the motor speed can follow the production speed of the unit; when producing thin materials, in order to avoid the entrance of large tension unwinding and breaking of the strip, the tension roller is required to participate in the production. The lower tension roller is driven by the hydraulic cylinder or the rotary motor to rotate and swing back downward, and the hydraulic cylinder locks the lower roller swinging mechanism. During this rotation and swinging process, the lower roller drives the strip to automatically form an S-shaped bypass curve, avoiding the S-shaped movement of the strip head passing through the tension roller without traction, and avoiding the problem of strip threading jam.

[0076] To achieve one-button electrical automation:

[0077] The electrical control program is written to meet the realization of the one-button threading process. The action sequence of the entrance tension roller is as follows:

[0078] The lower roller 42 on the unwinding side swings up → the fixed guide plate 31 on the unwinding side rises → the fixed guide plate 31 on the unwinding side swings up → the first movable guide plate 32 on the unwinding side extends → stops → the tension roller 4 on the unwinding side rotates at the threading speed → the unwinding machine 2 rotates the steel coil 10 at the threading speed → automatically threads the steel coil to the leveling machine 5 (either biting into the closed roll gap or pressing down after passing through the open roll gap can be selected as an operation mode for the on-site operator) → the unwinding machine 2 and the leveling machine 5 are connected → the fixed guide plate 31 on the unwinding side and the first movable guide plate 32 on the unwinding side return to the initial position, and the lower roller 42 on the unwinding side swings down → the lower roller 42 on the unwinding side is locked.

[0079] The entrance section threading process needs to meet the following electrical interlocking requirements:

[0080] Only 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 in 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 in the retracted limit state, can the rotating swing hydraulic cylinder or motor of the lower roller 42 on the unwinding side be started and the lower roller 42 on the unwinding side be able to swing downward.

[0081] Only when the fifth proximity switch on the unwinding side detects that the lower roller 42 on the unwinding side is at the lower limit position, the lower roller locking cylinder on the unwinding side can lock the lower roller 42 on the unwinding side; before the lower roller 42 on the unwinding side swings downward, the fifth proximity switch on the unwinding side must be opened first.

[0082] Only when the second proximity switch on the uncoiling side detects that the swing hydraulic cylinder 36 on the uncoiling side is in the 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 the retracted limit state, can the coil transport vehicle 9 enter the range of the uncoiler 2 and place the steel coil 10 on the uncoiler 2 to avoid interference between the steel coil and the guide plate.

[0083] The action sequence of the tension roller in the exit section is as follows:

[0084] The lower roller 62 on the winding side swings up → the fixed guide plate 71 on the winding side rises → the fixed guide plate 71 on the winding side swings up → the first movable guide plate 72 on the winding side extends → stops → the tension roller 6 on the winding side rotates at the threading speed → the winder 8 rotates at the threading speed → the automatic threading of the belt enters the winder 8 from the leveling machine 5 through the exit winding side tension roller 6 and the winding side guide plate device 7 → the winder 8 and the leveling machine 5 are in tension → the fixed guide plate 71 on the winding side and the first movable guide plate 72 on the winding side return to the initial position, and the lower roller 62 on the winding side swings down → the locking cylinder locks the lower roller 62 on the winding side → the tension roller 6 on the winding side rotates at the threading speed to cooperate with the exit tension roller to thread the belt.

[0085] The exit section threading process needs to meet the following electrical interlocking requirements:

[0086] Only when the first proximity switch on the winding side detects that the lifting slider 73 on the winding side is at the lower limit position, 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 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.

[0087] Only when the fifth proximity switch on the winding side detects that the winding side lower roller 62 is at the lower limit position, the winding side lower roller locking cylinder can lock the winding side lower roller 62; before the winding side lower roller 62 swings downward, the fifth proximity switch on the winding side must be opened first.

[0088] 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, the coil transport vehicle 9 can enter the range of the coiler 8 and take away the steel coil 10 on the coiler 8 to avoid interference between the steel coil and the guide plate.

[0089] The present invention 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 (such as papermaking) that use a per-roll tape threading production method can also adopt the one-button tape threading control concept of the present invention. In all such cases, the technical solution of the present invention can be used. The technical solution of the present invention is not limited to the vertical tension roller equipment itself, but is also applicable to other similar equipment that requires tape threading between two vertical rollers. The present invention provides a one-button tape threading operation mode for a swinging vertical double-roller equipment. The technical solution of the present invention can be used in any situation that is suitable for this situation.

[0090] The above is only a specific embodiment of the present invention, and cannot be used to limit the scope of the invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the protection scope of the present invention should still fall within the scope of the present invention. In addition, the technical features in the present invention can be freely combined with each other, with technical features and technical solutions, and with technical solutions.

Claims

1. A leveling machine unit, characterized in that: The leveling machine group comprises an unwinder (2), an unwinding side guide plate device (3), an unwinding side tension roller (4), a leveling machine (5), a winding side tension roller (6), a winding side guide plate device (7) and a winding machine (8) which are arranged in sequence from right to left; The unwinding side guide plate device (3) comprises an unwinding side fixed guide plate (31), and the unwinding side fixed guide plate (31) can be raised and lowered and swung; The unwinding side tension roller (4) comprises an unwinding side upper roller (41) and an unwinding side lower roller (42) arranged up and down, and the unwinding side lower roller (42) can swing to the upper or lower side of the unwinding side upper roller (41). When the unwinding side lower roller (42) swings to the upper limit position, an unwinding side upper channel (43) is formed between the unwinding side upper roller (41) and the unwinding side lower roller (42); The winding side tension roller (6) comprises a winding side upper roller (61) and a winding side lower roller (62) arranged up and down, and the winding side lower roller (62) can swing to the upper or lower side of the winding side upper roller (61). When the winding side lower roller (62) swings to the upper limit position, a winding side upper channel (63) is formed between the winding side upper roller (61) and the winding side lower roller (62); The winding side guide plate device (7) comprises a winding side fixed guide plate (71), and the winding side fixed guide plate (71) can be raised and lowered and swung.

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

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

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

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

6. The leveling machine according to claim 1, characterized in that: The flattening machine (5) comprises a flattening roller (51), an inlet photoelectric switch (52) is arranged outside the inlet side of the flattening roller (51), and an outlet photoelectric switch (53) is arranged outside the outlet side of the flattening roller (51). The inlet photoelectric switch (52) can detect whether the lead (101) of the steel coil (10) passes through the inlet photoelectric switch (52), and the outlet photoelectric switch (53) can detect whether the lead (101) of the steel coil (10) passes through the outlet photoelectric switch (53).

7. The leveling machine according to claim 1, characterized in that: The winding side guide plate device (7) further comprises a winding side lifting slider (73), a winding side lifting drive mechanism (78) and a winding side frame column (75); the right end of the winding side fixed guide plate (71) is connected to the upper part of the winding side lifting slider (73) through the winding side upper rotating shaft (74); the winding side fixed guide plate (71) is connected to the lower part of the winding side lifting slider (73) through the winding side swing hydraulic cylinder (76) and the winding side lower rotating shaft (77) in turn; the axis of the winding side upper rotating shaft (74) and the axis of the winding side lower rotating shaft (77) are both The winding side lifting drive mechanism (78) extends in the front-to-back direction, and can make the winding side lifting slider (73) move up and down along the winding side frame column (75). The winding side swing hydraulic cylinder (76) can drive 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 and connected with the winding side first movable guide plate (72). The winding side first telescopic mechanism (710) can make the winding side first movable guide plate (72) extend to the left or retract to the right relative to the winding side fixed guide plate (71).

8. The leveling machine according to claim 7, characterized in that: When the winding side fixed guide plate (71) is located at the upper limit position, the winding side lifting slider (73) is located at the upper limit position, the winding side swing hydraulic cylinder (76) is in an 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 up-down direction, the left end of the winding side fixed guide plate (71) is lower than the right end of the winding side fixed guide plate (71), and after the winding side first movable guide plate (72) is extended to the left, the winding side fixed guide plate (71) and the winding side first movable guide plate (72) are in an extended state. 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 entrance of the coiler (8); when the fixed guide plate (71) on the winding side is located at the lower limit position, the lifting slider (73) on the winding side is located at 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 located at 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 machine according to claim 7, characterized in that: The winding side guide plate device (7) also includes a second movable winding side guide plate (79) and a second telescopic mechanism (711) on the winding side. The second telescopic mechanism (711) on the winding side is located below the fixed winding side guide plate (71). The second telescopic mechanism (711) on the winding side can make the second movable winding side guide plate (79) extend to the right or retract to the left relative to the fixed winding side guide plate (71). The second movable winding side guide plate (79), the fixed winding side guide plate (71) and the first movable winding side guide plate (72) are stacked in sequence from top to bottom.

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

11. The leveling machine according to claim 1, characterized in that: The leveling machine unit also includes a preparation station (1) and a coil transport vehicle (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 vehicle (9) can transport the steel coil (10) on the ground roller (11) to the uncoiler (2). The coil transport vehicle (9) can also take away the steel coil (10) on the coiler (8).

12. A working method of a leveling machine as claimed in claim 1, characterized in that: The following steps are included in sequence: Step 1: Preparation; Step 2, transporting the steel coil (10) to the uncoiling machine (2), the uncoiling side lower roller (42) of the uncoiling side tension roller (4) is located at the upper limit position, and the uncoiling side fixed guide plate (31) is located at the upper limit position; Step 3, the uncoiler (2) operates so that the strip head (101) of the steel coil (10) passes through the fixed guide plate (31) on the uncoiler side, the upper channel (43) on the uncoiler side and the roller gap (54) of the leveler (5) in sequence, and the roller gap (54) of the roller gap (54) of the leveler (5) closes and clamps the steel strip (102); Step 4: applying a rolling force to the leveling roller (51) of the leveling machine (5), starting the transmission motor of the leveling machine (5), and establishing tension on the steel strip (102) between the leveling machine (5) and the uncoiler (2); Step 5: The unwinding side fixed guide plate (31) moves to the lower limit position, and then the unwinding side lower roller (42) of the unwinding side tension roller (4) swings to the lower limit position; Step 6, the winding side lower roller (62) of the winding side tension roller (6) is located at the upper limit position, and the winding side fixed guide plate (71) is located at the upper limit position; Step 7, the unwinding machine (2), the unwinding side tension roller (4), the leveling machine (5), the winding side tension roller (6) and the coiling machine (8) are operated at the threading speed at the same time, the strip head (101) of the steel coil (10) enters the coiling machine (8), and tension is established on the steel strip (102) between the coiling machine (8) and the leveling machine (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 machine group according to claim 12, characterized in that: 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 in 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 in the retracted limit state; Only when the fifth proximity switch on the unwinding side detects that the lower roller (42) on the unwinding side is at the lower limit position, the lower roller locking cylinder on the unwinding side can lock the lower roller (42) on the unwinding side; The coil transport vehicle (9) can place the steel coil (10) onto the uncoiler (2) only when the second proximity switch on the uncoiler side detects that the swing hydraulic cylinder (36) on the uncoiler side is in the retracted limit state and the third proximity switch on the uncoiler side detects that the first movable guide plate (32) on the uncoiler side is in the retracted limit state.

14. The working method of the leveling machine group according to claim 12, characterized in that: 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 the lower limit position, the second proximity switch on the winding side detects that the swing hydraulic cylinder (76) on the winding side is in the 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 the retracted limit state. Only when the fifth proximity switch on the winding side detects that the winding side lower roller (62) is at the lower limit position, the winding side lower roller locking cylinder can lock the winding side lower roller (62); The coil transport vehicle (9) can take away the steel coil (10) on the coiler (8) only when the second proximity switch on the coiling side detects that the swing hydraulic cylinder (76) on the coiling side is in the retraction limit state and the third proximity switch on the coiling side detects that the first movable guide plate (72) on the coiling side is in the retraction limit state.

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