Method for adjusting the tower shape of the inner and outer rings of a strip steel coil

Abstract

The application discloses a method for adjusting the inner and outer tower shape of a strip steel coil, which comprises the following steps: the head of the strip steel enters the nip of the winding drum of the coiler through the guide plate table body; the extension assembly of the multifunctional guide plate table drives the mechanism in the extension assembly to reach the centering opening degree, so that the head of the strip steel is clamped and centered with the center line of the recoiling equipment; the recoiling equipment is tensioned, the winding drum is operated for M turns, the head of the strip steel is wound, and the winding operation is continuously performed; when the strip steel is wound for the remaining last N turns, the strip steel enters the tail swinging state; the bending roller of the recoiling equipment is pressed down; the swing hydraulic cylinder of the tail pressing roller device swings downward, so that the middle roller of the multifunctional tail pressing roller presses the steel coil; when the strip steel is completely wound on the winding drum of the coiler, the centering mechanism on the multifunctional tail pressing roller performs the close centering on the tail N turns; after the centering is completed, the uncoiler is used to unload the coil. The actual position of the strip steel is consistent with the center position of the unit, and the defects of the inner core and the outer tower shape of the steel coil are effectively avoided.

Description

Technical Field

[0001] The present application belongs to the field of steel rolling technology, and specifically relates to a method for adjusting the tower shape of inner and outer rings of strip coiling. Background Art

[0002] Hot-rolled skin-passing and recoiling mills are used to flatten, recoil, and rewind steel coils at room temperature after hot rolling. After processing according to the mill's production process requirements, the strip's mechanical properties, shape, and surface quality are enhanced, resulting in coils that meet customer requirements. However, both hot-rolled skin-passing mills and strip-leading and recoiling mills suffer from a common problem: the formation of towering strips during the recoiling process, which seriously impacts product quality. Although existing technologies incorporate side roll centering devices during strip threading and during tailing to mitigate towering, this phenomenon is still unavoidable during the first three turns of the recoiling process and the last three turns of the tailing.

[0003] This is because the position where the strip head enters the coiler is inconsistent with the position of the strip steel in the middle of the unit. Although a centering device is also arranged in the middle of the unit, the installation position of the centering device is far away from the jaws of the coiler drum. As a result, the position of the strip head when the jaws are clamped is inconsistent with the actual center position of the strip steel, resulting in the inner core tower shape of the steel coil;

[0004] In a hot rolling skin-pass mill or a stainless steel strip rewinding mill, the production line length ranges from 20 to 30 meters. Two sets of side roller centering devices are arranged near the uncoiler and coiler in front and behind the mill. The purpose is to ensure that the front and rear strips parked on the mill are on the center line of the mill. The existing side roller centering devices only act on the static strips and cannot be adjusted for dynamic ones.

[0005] Moreover, the transmission mode of the edge roller centering device is mostly a motor-driven ball screw or hand wheel adjustment, which has slow adjustment accuracy and speed, low precision and low efficiency of the rotation mechanism; the edge roller is easily squeezed and scratched by the edge of the strip. The material of the edge roller is 45# steel, which squeezes and scratches the edge of the strip during the alignment process. In the event of misoperation, the strip and the edge roller rub against each other, causing serious damage;

[0006] The current method to eliminate the tower-shaped defect of strip steel is mainly to install a camera near the uncoiler, manually intervene in the uncoiler CPC according to the monitoring signal, and correct the tower-shaped position during the coiling process. Summary of the Invention

[0007] To this end, the present application proposes a method for adjusting the tower shape of the inner and outer rings of the strip coiling, comprising:

[0008] Step 1, the centering opening of the centering mechanism of the multi-functional guide plate table is determined according to the width of the produced strip steel, so as to determine the stroke of the telescopic assembly, through which the edge roller of the centering mechanism of the multi-functional guide plate table reaches the set centering position, the centering opening of the centering mechanism of the multi-functional tail press roller is determined according to the width of the produced strip steel, so as to determine the stroke of the telescopic assembly, through which the edge roller of the centering mechanism of the multi-functional tail press roller reaches the set centering position;

[0009] Step 2: the guide plate table body is lifted to the nip position on the coiler drum under the drive of the lifting hydraulic cylinder;

[0010] Step 4: the head of the strip steel is transmitted from the guide plate table body to the nip of the coiler drum through the pinch roller of the tension device;

[0011] Step 5: after the head of the strip steel enters the nip, the telescopic assembly of the multi-functional guide plate table drives the centering mechanism to reach the centering opening, so as to clamp the head of the strip steel and center with the center line of the recoiling equipment;

[0012] Step 6: the drum is expanded, the nip clamps the head of the strip steel, and the telescopic assembly of the multi-functional guide plate table is driven to make the centering mechanism reach the maximum opening for standby;

[0013] Step 7: the guide plate table body is driven away from the nip and the drum position by the lifting hydraulic cylinder;

[0014] Step 8: the recoiling equipment builds tension, the drum runs M turns, the head of the strip steel is coiled, and the coiling action continues;

[0015] Step 9: when the strip steel is coiled on the coiler drum for the remaining last N turns, the recoiling equipment is slowed down to the threading speed, and the strip steel enters the tail flinging state;

[0016] Step 10: during the tail flinging process, the bending roller of the recoiling equipment is pressed down to prevent destructive tail flinging of the strip steel caused by misoperation;

[0017] Step 11: before the tail of the strip steel passes through the tension device, the swing hydraulic cylinder of the tail press roller device swings downward, so that the middle roller of the multi-functional tail press roller presses the coil;

[0018] Step 12: when the strip steel is completely coiled on the coiler drum, the centering mechanism of the multi-functional tail press roller approaches the tail N turns for centering;

[0019] Step 13: after the centering is completed, the uncoiler car rises to touch the tail of the strip steel with the pressure;

[0020] Step 14: after the tail of the strip steel is in a stable state, the bending roller and the multifunctional tail pressing roller are simultaneously lifted, and the centering mechanism of the multifunctional tail pressing roller is driven by the telescopic assembly to the maximum opening degree for standby;

[0021] Step 15: the winding drum is contracted, the jaws are opened, the uncoiling vehicle lifts the steel coil, and it is ensured that the inner circle of the steel coil is separated from the outer surface of the winding drum;

[0022] Step 16: the uncoiling vehicle bears the steel coil at a stable height, separates the steel coil from the winding drum in a direction away from the winding drum, and uncoils the steel coil.

[0023] Optionally, the range of M is 1≤M≤3, and the range of N is 1≤M≤3.

[0024] Optionally, the centering mechanism on the multifunctional tail pressing roller approaches and centers the N coils of the tail, comprising: each pair of edge rollers is driven by a telescopic assembly to move to a set centering position, and the winding drum is rotated by 1-2 turns in the winding direction, so that the tower type of the outer circle of the steel coil is eliminated.

[0025] Optionally, the multifunctional tail pressing roller comprises a rack seat installed at the output end of the swing hydraulic cylinder of the tail pressing roller device, and the intermediate roller and the centering mechanism installed on the rack seat.

[0026] Optionally, the multifunctional guide plate table comprises a rack seat installed on the guide plate table body, and the centering mechanism installed on the rack seat.

[0027] Optionally, the centering mechanism comprises:

[0028] At least one pair of edge rollers and a pair of telescopic assemblies connected between each pair of edge rollers, each pair of edge rollers is driven by a pair of telescopic assemblies, and the side edges of the strip steel are centered with the center line of the recoiling equipment.

[0029] Optionally, the rack seat is provided with an intermediate roller shaft, and an intermediate roller is installed on the intermediate roller shaft, and the intermediate roller is used for pressing the plate surface of the tail of the strip steel.

[0030] Optionally, each pair of telescopic assemblies is fixed on the intermediate beam seat of the rack seat, a guide rod parallel to the transmission direction of the telescopic assembly is arranged on the rack seat, sliding supports are slidably connected at both ends of the guide rod, and the edge roller is rotatably connected to the corresponding sliding support.

[0031] Optionally, the edge roller is a high-density rubber roller.

[0032] Optionally, the telescopic assembly is a hydraulic cylinder, and the hydraulic cylinder adopts a proportional valve to control the stroke.

[0033] The technical effects of the present application are as follows:

[0034] 1. The position where the strip head enters the coiler is essentially the same as the position where the strip is aligned in the center of the recoiling unit. The strip head is centered on the centering device of the multifunctional guide plate. This position is only 400mm away from the coiler jaws. During the centering process, the strip head can be first inserted into the jaws, and then the jaws are clamped. The actual position of the strip is consistent with the center of the recoiling unit, effectively avoiding the defect of a tower-shaped core in the coil.

[0035] 2. The device and method of the present invention are used in hot-rolling skin-pass mills or stainless steel strip rewinding mills. Although the production line length varies from 20 to 30 meters, the normal centering function of the unit is retained. A multifunctional exit guide plate and a multifunctional tail roller device are respectively arranged in front and behind the coiler drum. The centering adjustment method for the inner and outer ring towers of the steel coil is a dynamic adjustment process. When the inner and outer ring towers are adjusted, the centering functions of the guide plate and the tail roller can maintain the locking width of the side rollers of the centering device during the rotation of the drum. Because there is no tension in front and behind the drum, it is more accurate than the existing technology.

[0036] 3. The centering device of the present invention has high adjustment accuracy and fast speed. The centering device is attached to the exit guide plate platform and the tail roller device, and uses a proportional valve to control the MTS hydraulic cylinder for precise control, with fast adjustment speed, high efficiency and accurate accuracy.

[0037] 4. The centering mechanism on the multifunctional guide plate platform and the multifunctional tail roller of the present invention will not cause any damage to the strip. The edge rollers are made of high-density rubber rollers, which can avoid any scratches caused by the edge rollers and the strip edges.

[0038] 5. The device and method of the present invention are suitable for preventing pyramidal defects in the inner core and outer coils of hot-rolling skin-pass mills and stainless steel strip rewinders. Without the need for additional electrical testing components, the device and method of the present invention eliminate pyramidal defects in the first three coils and the last three coils of the strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 Schematic diagram of a rewinding device according to an embodiment of the present invention.

[0040] Figure 2 This is a step diagram of a method for adjusting the tower shape of the inner ring of a steel coil according to an embodiment of the present invention.

[0041] Figure 3 This is a step diagram of a method for adjusting the tower shape of the outer ring of a steel coil according to an embodiment of the present invention.

[0042] Figure 4 for Figure 1 side view.

[0043] Figure 5 for Figure 4 BB cross-sectional view. DETAILED DESCRIPTION

[0044] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0045] like Figure 1 As shown, the method for adjusting the inner and outer coil pyramids of a strip coil in this embodiment is used to align the strip's head and tail during the recoiling process of a hot-rolling skin-pass mill or a stainless steel strip recoiling unit. Both the hot-rolling skin-pass mill and the stainless steel strip recoiling unit include a recoiling device, which includes a tensioning device 1, a coiler drum 2, a tail roller assembly 3, a coil unloading car 4, a multifunctional guide plate platform 5, a multifunctional tail roller 6, and a bending roller 7. The recoiling device recoils the strip.

[0046] The multifunctional guide plate platform includes a guide plate platform body 11 for guiding the steel strip 100 to be rewound. The steel strip 100 to be rewound is laid on the guide plate platform body 11. Moreover, the strip head of the steel strip 100 to be rewound corresponds to the preset jaw position on the coiler drum 2 and moves toward the jaw (not shown) on the coiler drum 2 as the tension device 1 pulls. A centering mechanism for centering the strip head of the steel strip 100 to be rewound is provided on the guide plate platform body 11 (the centering mechanism has the same structure as the centering mechanism on the multifunctional tail roller). Specifically, the frame seat 301 of the centering mechanism is installed on the guide plate platform body 11. The strip head is guided into the jaw on the multifunctional guide plate platform 5 and is centered by the centering mechanism on the multifunctional guide plate platform so that the strip head is wound on the coiler drum 2 to ensure that the inner ring of the strip head has no tower shape.

[0047] The tail roller assembly 3 includes a swinging hydraulic cylinder. A multifunctional tail roller is mounted on the swinging hydraulic cylinder via a frame mount 301. The multifunctional tail roller is equipped with an intermediate roller and a centering mechanism. The tail roller assembly 3 drives the multifunctional tail roller to swing via a swinging hydraulic cylinder 312. When winding the tail of the strip, the multifunctional tail roller of the tail roller assembly 3 centers and compresses the tail of the strip wound onto the coiler drum 2, thereby ensuring that the outer ring of the strip does not have a conical shape.

[0048] The method for adjusting the inner and outer ring towers of the strip steel coiling includes a method for adjusting the inner ring tower of the strip steel coiling and a method for adjusting the outer ring tower of the strip steel coiling. The steps are described in detail below. Figure 2 、 Figure 3 As shown:

[0049] Step 1, the preparation state of the re-coiling, the centering opening of the centering mechanism of the multi-functional guide plate table is determined according to the width of the produced strip steel, so as to determine the stroke of the telescopic assembly, through the stroke of the telescopic assembly, the edge roller of the centering mechanism of the multi-functional guide plate table can reach the set centering position, the centering opening of the centering mechanism of the multi-functional tail press roller is determined according to the width of the produced strip steel, so as to determine the stroke of the telescopic assembly, through the stroke of the telescopic assembly, the edge roller of the centering mechanism of the multi-functional tail press roller can reach the set centering position;

[0050] Step 2: the guide plate table body is lifted to the nip position on the corresponding coiler drum under the drive of the lifting hydraulic cylinder;

[0051] Step 3: the head of the strip steel passes through the guide plate table body, the drum nip is opened before the end of the process of passing through the guide plate table, the head of the strip steel approaches the nip after passing through the guide plate table body, the position of the head of the strip steel approaching the nip is different for different specifications of the strip steel, which can be set according to experience and will not be described here.

[0052] Step 4: the head of the strip steel is transmitted from the guide plate table body to the nip of the coiler drum through the pinch roller of the tension device, the head of the strip steel enters the nip of the coiler drum after passing through the guide plate table body, before entering, the angle of the guide plate table body can be adjusted for multiple times to make the head of the strip steel enter the nip after being completely aligned with the nip;

[0053] Step 5: after the head of the strip steel enters the nip, the telescopic assembly of the multi-functional guide plate table drives the centering mechanism to reach the centering opening, so as to clamp the head of the strip steel and center the head of the strip steel with the center line of the re-coiling equipment;

[0054] Step 6: the drum is expanded, the nip clamps the head of the strip steel, the telescopic assembly of the multi-functional guide plate table is driven to make the centering mechanism reach the maximum opening position for standby;

[0055] Step 7: the guide plate table body is driven away from the nip and the drum position by the lifting hydraulic cylinder;

[0056] Step 8: the re-coiling equipment is built up, the drum is rotated at a low speed for M turns, the head of the strip steel is coiled, it can be ensured that the head M turns are not tower-shaped, and the coiling action is continued, and M is less than or equal to 3;

[0057] Step 9: when the remaining last N turns of the strip steel are coiled on the coiler drum, the re-coiling equipment is slowed down to cancel the front and rear tension, and the strip steel enters the tail throwing state, wherein N is preferably 3;

[0058] Step 10: during the tail throwing process, the bending roller 7 of the tension device 1 is pressed down to a suitable position to prevent destructive tail throwing of the strip steel caused by misoperation;

[0059] Step 11: Before the strip tail passes through the tension device 1, the swing hydraulic cylinder of the tail press roller device 3 swings downward, so that the middle roller of the multifunctional tail press roller is pressed down to close and abut against the steel coil, specifically, the middle roller 303 is pressed down on the steel coil to prevent the strip steel coil from loosening without tension;

[0060] Step 12: When the strip is completely wound on the coiler drum, the centering mechanism on the multifunctional tail press roller is used to close and center the tail N turns, specifically, the two side edge rollers 306 are respectively driven by two hydraulic cylinders to move to the set centering position, and at the same time, the coiler drum 2 slowly rotates 1-2 turns according to the winding direction, to ensure that the tower type of the outer turns of the steel coil is eliminated;

[0061] Step 13: After the centering is completed, the uncoiler car 4 slowly rises to contact and appropriately press the strip tail of the steel coil with a touch type pressure to prevent the strip tail from loosening;

[0062] Step 14: After the strip tail is in a stable state between its own weight and the lifting pressure of the uncoiler car, the press-bending roller 7 and the multifunctional tail press roller are simultaneously lifted, and the side roller 306 is quickly opened to the maximum opening degree by the hydraulic cylinder for standby;

[0063] Step 15: The coiler drum is retracted, the jaws are opened, and the uncoiler car 4 slowly lifts the steel coil by a certain distance to ensure that the inner turns of the steel coil are separated from the outer surface of the coiler drum;

[0064] Step 16: The uncoiler car 4 stably carries the steel coil to a certain height, and then pulls the steel coil away from the coiler drum in a direction away from the coiler drum to unload the steel coil.

[0065] Through the above steps, it can be ensured that the outer turns of the steel coil do not have a tower type during the recoiling process, and the steel coil can be packed into a qualified product.

[0066] The following describes the structure of the multifunctional tail press roller used in the method for adjusting the tower type of the outer turns of the strip coil in this embodiment.

[0067] The multifunctional tail press roller is used for centering and pressing the tail of the strip during the recoiling process of the hot rolling and skin pass mill or the recoiling process of the stainless steel strip recoiling unit. The hot rolling and skin pass mill or the stainless steel strip recoiling unit both include a recoiling device, and the recoiling device includes a tension device 1, a coiler drum 2, a tail press roller device 3, an uncoiler car 4, a guide plate table 5, and a press-bending roller 7. The strip is re-wound by the recoiling device. The multifunctional tail press roller of this embodiment includes a rack seat 301 mounted on the swing hydraulic cylinder 312 of the tail press roller device 3, and a middle roller 303 and a centering mechanism attached to the rack seat 301.

[0068] The strip head of the strip to be coiled 100 corresponds to the position of the jaws on the coiler drum 2, and moves to the direction of the jaws (not shown in the figure) on the coiler drum 2 under the traction of the tension device 1, and the strip head is guided on the guide plate table 5 to enter the jaws, so as to be coiled on the coiler drum 2. When the tail of the strip is coiled, the multifunctional tail pressing roller in the embodiment is used to center and press the tail of the strip coiled on the coiler drum 2.

[0069] The rack seat 301 extends along the axis direction of the drum 2, and the intermediate roller shaft 302 is arranged on the rack seat 301. The intermediate roller 303 is installed on the intermediate roller shaft 302, and is used to press the tail of the strip. The intermediate roller 303 has the function of preventing the coil from loosening, and can be swung up and down by the swing hydraulic cylinder, so as to facilitate the centering of the outer circle of the coil before the coil is unloaded, and avoid the tower-shaped phenomenon of the outer 3 circles of the strip.

[0070] As shown in Figure 4 , Figure 5 , the centering mechanism will be described below. A pair of telescopic assemblies are arranged on the rack seat 301. The telescopic assemblies can be hydraulic cylinders, or two hydraulic cylinders can be arranged. In the embodiment, a double-head hydraulic cylinder 304 is used. In the following, the double-head hydraulic cylinder is taken as an example for description. The double-head hydraulic cylinder 304 is fixed on the middle beam seat 305 of the rack seat 301. The edge rollers 306 are arranged at the ends of the telescopic assemblies. The edge rollers 306 can be high-density rubber rollers. The two edge rollers 306 are respectively located on the two sides of the intermediate roller 303, and more specifically, are located on the two sides of the strip. The edge rollers 306 are used to clamp and center the two sides of the tail of the strip through the telescoping of the telescopic assemblies, or to relax. The output ends of the double-head hydraulic cylinder 304 act synchronously. In actual use, when the tail of the strip is located between the two edge rollers 306, the double-head hydraulic cylinder 304 is used to move the two edge rollers 306 towards each other, so as to clamp and center the tail of the strip to the center line of the whole leveling unit, thereby realizing accurate correspondence with the jaws on the drum.

[0071] More specifically, in order to enable the two edge rollers 306 to move with the double-head hydraulic cylinder 304, a guide rod 307 parallel to the transmission direction of the double-head hydraulic cylinder 304 can be arranged on the rack seat 301. The sliding supports 308 are respectively connected to the two ends of the guide rod 307. The two edge rollers 306 are respectively connected to the two sliding supports 308. The lower ends of the two sliding supports 308 are respectively connected to the two output ends of the double-head hydraulic cylinder 304. By arranging the guide rod 307, the edge rollers 306 can be prevented from being stuck when moving with the double-head hydraulic cylinder 304.

[0072] In addition, it needs to be explained that, in order to prevent the jamming phenomenon between the strip tail and the edge roller 306 during the transmission of the strip tail, the edge roller 306 can be rotatably connected to the sliding support 308, and, in order to prevent the edge roller 306 from being detached from the sliding support 308, a pressing plate 309 is arranged on the side of the edge roller 306 away from the rack base 301, and the edge roller 306 is blocked by the pressing plate 309.

[0073] A side wall support 310 rotatably connected with the guide rod 307 is arranged at both ends of the rack base 301, and the side wall support 310 plays an auxiliary supporting role for the guide rod 307.

[0074] In addition, in order to prevent the iron filings on the strip to be rewound from falling on the guide rod 307 and affecting the normal work of the guide rod 307, a dust cover above the guide rod 307 can be arranged on the rack base 301, and the iron filings falling from the strip to be rewound are received by the dust cover.

[0075] The rack base 301 can be swung by the swing hydraulic cylinder 312, so that the intermediate roller 303 is pressed on the strip tail, and the edge roller 306 can be adjusted to center the strip tail under the drive of the double-end hydraulic cylinder 304.

[0076] The function of the tail pressing roller device 3 of the embodiment is not only to press and prevent loosening of the strip tail, but more importantly, to guide and center the two sides of the strip tail when the strip tail enters the jaw of the winding drum of the coiler. According to the width of the strip, the proportional valve control hydraulic cylinder can be used to complete the opening setting (i.e. the distance between the edge rollers 306) and the centering adjustment of the edge rollers 306. In use, first, according to the width of the strip to be produced, the left and right edge rollers 306 are driven to pre-set the stroke of the hydraulic cylinder, the stroke parameters are set by the control system, and the displacement control is realized by the MTL3 magnetostrictive displacement sensor on the device. The principle is to use two different magnetic fields to generate a strain pulse signal when they intersect, then calculate the time period required for the signal to be detected, and thus convert the accurate position. During the tail throwing operation, the left and right edge rollers 306 are respectively driven by two hydraulic cylinders to move to the centering position, and after the winding is completed, the edge rollers 306 are quickly opened to the maximum opening degree by the hydraulic cylinder.

[0077] Of course, the present application can have other various embodiments, and those skilled in the art can make various corresponding changes and modifications according to the present application without departing from the spirit and essence of the present application, but these corresponding changes and modifications all belong to the protection scope of the claims of the present application.

Claims

1. A method for adjusting the tower shape of inner and outer rings of strip coiling, characterized in that: include: Step 1: Determine the centering opening of the centering mechanism of the multifunctional guide plate table according to the width of the produced strip steel, thereby determining the stroke of its telescopic component, through which the side rollers of the centering mechanism of the multifunctional guide plate table can reach the set centering position; determine the centering opening of the centering mechanism of the multifunctional tail pressure roller according to the width of the produced strip steel, thereby determining the stroke of its telescopic component, through which the side rollers of the centering mechanism of the multifunctional tail pressure roller can reach the set centering position; Step 2: The guide plate platform body is lifted to the corresponding jaw position on the reel of the winder under the drive of the lifting hydraulic cylinder; Step 4: The strip head is transferred from the guide plate table body through the pinch roller of the tension device, and the strip head passes through the guide plate table body and enters the jaws of the coiler drum; Step 5: After the strip head enters the jaws, the telescopic assembly of the multifunctional guide plate table drives the mechanism to reach the centering opening, thereby aligning the strip head clamping with the center line of the rewinding equipment; Step 6: The reel expands, the jaws clamp the strip head, and the telescopic assembly of the multi-functional guide plate table is driven to make the centering mechanism reach the maximum opening and standby; Step 7: The guide plate platform body is driven by the lifting hydraulic cylinder to move away from the jaws and the reel position; Step 8: The rewinding equipment is set up, the reel runs M turns, the strip head is coiled, and the coiling action continues; Step 9: When the strip steel has coiled the last N turns on the coiler drum, the rewinding equipment slows down to the threading speed and the strip steel enters the tail swinging state; Step 10: During the strip tailing process, the bending roller of the rewinding equipment is pressed down to prevent destructive strip tailing caused by misoperation; Step 11: Before the tail of the strip passes through the tension device, the swing hydraulic cylinder of the tail pressing roller device swings downward, so that the middle roller of the multifunctional tail pressing roller presses the steel coil; Step 12: When the strip is completely wound on the coiler drum, the centering mechanism on the multifunctional tail roller will perform close centering on the N turns of the strip tail; Step 13: After the alignment is completed, the unloading car rises and presses the tail of the steel coil with contact pressure; Step 14: After the tail of the strip is in a stable state, the bending roller and the multifunctional tail roller are lifted simultaneously, and the centering mechanism of the multifunctional tail roller is driven by the telescopic assembly to the maximum opening position and waits; Step 15: The reel shrinks, the jaws open, and the unloading vehicle lifts the steel coil to ensure that the inner ring of the steel coil is separated from the outer surface of the reel; Step 16: The unloading car carries the steel coil at a stable height, pulls the steel coil away from the reel in the direction away from the reel, and unloads the coil.

2. The method for adjusting the inner and outer ring pyramidal shapes of the strip steel coiling according to claim 1, characterized in that: The range of M is 1≤M≤3, and the range of N is 1≤M≤3.

3. The method for adjusting the inner and outer ring pyramidal shapes of the strip steel coiling according to claim 1, characterized in that: The centering mechanism on the multifunctional tail pressure roller performs close centering on the N tail turns of the strip, including: each pair of edge rollers is driven by the telescopic assembly to move toward the center to the set centering position, and at the same time the reel rotates 1-2 turns in the winding direction, so that the tower shape of the outer ring of the steel coil is eliminated.

4. The method for adjusting the pyramidal shape of inner and outer coils of a strip steel coil according to claim 1, characterized in that: The multifunctional tail pressing roller comprises a frame seat installed at the output end of the swing hydraulic cylinder of the tail pressing roller device, and an intermediate roller and a centering mechanism installed on the frame seat.

5. The method for adjusting the pyramidal shapes of inner and outer coils of a strip steel coil according to claim 1, characterized in that: The multifunctional guide plate platform comprises a frame seat installed on the guide plate platform body and a centering mechanism installed on the frame seat.

6. The method for adjusting the pyramidal shapes of inner and outer coils of a strip steel coil according to claim 4 or 5, characterized in that: The centering mechanism comprises: At least one pair of side rollers and a pair of telescopic assemblies connected between each pair of side rollers, each pair of side rollers is driven by a pair of telescopic assemblies to clamp the side edge of the strip and align it with the center line of the rewinding device.

7. The method for adjusting the pyramidal shapes of inner and outer coils of a strip steel coil according to claim 6, characterized in that: An intermediate roller shaft is provided on the frame seat, and an intermediate roller is installed on the intermediate roller shaft. The intermediate roller is used to press the plate surface at the tail of the strip.

8. The method for adjusting the pyramidal shapes of inner and outer coils of a strip steel coil according to claim 6, characterized in that: Each pair of telescopic assemblies is fixed on the middle beam seat of the frame seat. A guide rod parallel to the transmission direction of the telescopic assembly is provided on the frame seat. Sliding supports are slidably connected to both ends of the guide rod. The side rollers are rotatably connected to the corresponding sliding supports. The sliding supports are respectively connected to the output ends of the telescopic assemblies.

9. The method for adjusting the pyramidal shapes of inner and outer coils of a strip steel coil according to claim 6, characterized in that: The side rollers are made of high-density rubber rollers.

10. The method for adjusting the pyramidal shapes of inner and outer coils of a strip steel coil according to claim 6, characterized in that: The telescopic component is a hydraulic cylinder, and the hydraulic cylinder adopts a proportional valve to control the stroke.

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