CN116532480A - Strip steel off-line inspection station and operation method thereof - Google Patents

Abstract

The invention relates to a strip steel offline inspection station, which comprises a pre-uncoiler, an uncoiling guide plate and a strip steel uncoiling mechanism positioned at the downstream, wherein the pre-uncoiler is also provided with a steel coil trimming device for trimming and rectifying steel coils during uncoiling and/or uncoiling. And in addition, the operation method of the strip steel off-line inspection station is also related. According to the invention, the steel coil edge aligning device is configured for the pre-uncoiling machine, so that the steel coil can be subjected to edge aligning and deviation correcting treatment during uncoiling and/or uncoiling, especially, the edge alignment of the strip steel for uncoiling is ensured, the subsequent utilization of the steel coil is facilitated, and the defects such as edge cracking and the like of the steel coil can be prevented.

Description

Strip steel off-line inspection station and operation method thereof

Technical Field

The invention relates to a strip steel offline inspection station and an operation method thereof.

Background

The off-line strip steel inspection station is generally arranged at the outlet position of the continuous rolling mill unit, and a coil of steel is selected at regular intervals according to the production scheduling rhythm and is conveyed to the inspection station which is arranged independently through equipment such as a coil trolley, a walking beam and the like. Typically inspection stations are provided with pre-unwinders, pinch rolls, centering, hydraulic shears, inspection tables, jacking clamps, etc.

The off-line inspection station is operated in such a way that after a certain length of strip steel is unfolded for inspection, the strip steel is rewound to a pre-unreeling machine, and a section of strip steel is not sheared for inspection, so that the consumption of the strip steel can be effectively reduced. But often suffer from uneven edges of the rolled strip. This is caused by:

1. the pre-uncoiler is low in configuration compared with an online unit, a steel coil width centering device is not generally arranged, the pre-uncoiler is roughly determined according to the central line travel of a steel coil trolley, and a certain deviation amount can exist in coiling.

2. In the process of steel coil unfolding inspection, a certain length is needed to be uncoiled, a strip steel inspection table is designed in the early stage, and strip steel basically belongs to a tension-free state and is easy to deviate on the whole unfolding length. The later stage designs a multipurpose magnetic belt which is matched with an electromagnet or a permanent magnet to be used, and has a certain suction force on the strip steel. However, the deflection of the strip steel is inevitably caused by the influence of the parallelism of the installation of the roller system of the belt conveyor, the convexity of the roller body and the like.

3. Without centering means, or even if centering means are designed, it is difficult to achieve the desired effect. When the distance between the side guide vertical roll and the strip steel is smaller, the edge of the strip steel is rubbed to the vertical roll especially when waves exist, and edge cracks or strain are easily caused.

4. The rolls of each apparatus are sometimes left in a raised, empty state in order to avoid creating additional roll marks without depressing them. The strip steel is in a free state.

5. And by combining all factors, uneven steel hemming parts are easy to cause in the process of rewinding.

Disclosure of Invention

The invention relates to an off-line inspection station for strip steel and an operation method thereof, which can at least solve part of defects in the prior art.

The invention relates to a strip steel offline inspection station, which comprises a pre-uncoiler, an uncoiling guide plate and a strip steel uncoiling mechanism positioned at the downstream, wherein the pre-uncoiler is also provided with a steel coil trimming device for trimming and rectifying steel coils during uncoiling and/or uncoiling.

As one of the implementation modes, the steel coil edge trimming device comprises two groups of steel coil edge trimming modules which are respectively arranged on the unit operation side and the unit transmission side; the steel coil trimming module comprises trimming Bian Zhi and trimming contact plates, wherein the trimming contact plates are movably arranged on the trimming support, and contact plate driving units for driving the trimming contact plates to switch between a contact position and a non-contact position are correspondingly arranged on the trimming support.

As one of the implementation modes, the steel coil trimming device further comprises a lifting driving mechanism for driving the trimming support to lift and/or a traversing driving mechanism for driving the trimming support to traverse so as to be close to or far away from the pre-uncoiler, wherein the traversing direction is perpendicular to the axis of the winding drum of the pre-uncoiler.

As one embodiment, the strip unwinding mechanism comprises a lateral guide device for lateral guide centering of the released strip or the strip to be wound.

As one embodiment, the side guide includes an operation side centering plate and a transmission side centering plate, which are respectively provided with centering driving mechanisms for driving them toward or away from the center line of the unit.

As one implementation mode, the operation side centering plate and the transmission side centering plate are enclosed to form a strip steel running channel, and two ends of the strip steel running channel are in a bell mouth shape which gradually expands outwards.

As one of the embodiments, the operation side centering plate is floatingly mounted on the operation side mount, and the transmission side centering plate is floatingly mounted on the transmission side mount.

As one of the implementation manners, a plurality of buffer springs are arranged between the operation side centering plate and the operation side mounting seat, a plurality of buffer springs are arranged between the transmission side centering plate and the transmission side mounting seat, and the axes of the buffer springs are perpendicular to the operation side centering plate.

The invention also relates to an operation method of the strip steel offline inspection station, which comprises the following steps:

when the steel coil is unfolded, the steel coil edge trimming device is abutted with the end face of the steel coil, and the deviated strip steel is corrected through the steel coil edge trimming device;

and/or when the steel coil is rewound, the steel coil edge aligning device is abutted with the end face of the steel coil, and the end part of the steel coil is aligned through the steel coil edge aligning device.

Further, when the steel coil is unfolded, the working position of the steel coil trimming device is arranged at the uncoiling position; when the steel coil is rewound, the working position of the steel coil trimming device is arranged at the coiling position.

The invention has at least the following beneficial effects: according to the invention, the steel coil edge aligning device is configured for the pre-uncoiling machine, so that the steel coil can be subjected to edge aligning and deviation correcting treatment during uncoiling and/or uncoiling, especially, the edge alignment of the strip steel for uncoiling is ensured, the subsequent utilization of the steel coil is facilitated, and the defects such as edge cracking and the like of the steel coil can be prevented.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a strip offline inspection station according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a steel coil trimming device according to an embodiment of the present invention;

fig. 3 is a schematic distribution diagram of two sets of steel coil trimming modules;

FIG. 4 is a schematic side view of a contact plate with a side alignment according to an embodiment of the present invention;

fig. 5 is a schematic front view of a side-aligned contact plate according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a sidewise guiding device according to an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

As shown in fig. 1, the embodiment provides a strip steel offline inspection station, which comprises a pre-uncoiler, an uncoiling guide plate 4 and a strip steel uncoiling mechanism positioned at the downstream, wherein the pre-uncoiler is further provided with a steel coil trimming device 1 for trimming and rectifying a steel coil 2 during uncoiling and/or uncoiling.

In this embodiment, by configuring the coil trimming device 1 for the pre-uncoiling machine, trimming and deviation rectifying treatment can be performed on the coil 2 during uncoiling and/or uncoiling, especially, alignment of edges of the coiled strip steel is ensured, subsequent utilization of the coil 2 is facilitated, and defects such as edge cracking and the like of the coil 2 can be prevented.

Example two

As shown in fig. 2-5, an embodiment of the present invention provides a steel coil trimming module 11, which includes a trimming support 111 and a trimming contact plate 112, wherein the trimming contact plate 112 is movably disposed on the trimming support 111, and a contact plate driving unit 113 for driving the trimming contact plate 112 to switch between a contact position and a non-contact position is correspondingly disposed on the trimming support 111.

In one embodiment, the contact plate driving unit 113 is used for driving the trimming contact plate 112 to make a linear motion so as to approach or separate from the steel coil; the contact position of the trimming contact plate 112 and the steel coil is the contact position, and the position far away from the steel coil along the axial direction of the steel coil is the non-contact position. Accordingly, the contact plate driving unit 113 is a linear driving device, and the driving direction is perpendicular to the plate surface of the trimming contact plate 112; the linear drive device includes, but is not limited to, a hydraulic cylinder, an air cylinder, or the like. Wherein the drive shaft of the linear drive device is preferably hinged to the back panel surface of the flush contact plate 112.

Preferably, contact plate guide units are provided on the trimming support 111 for reliably guiding the movement of the trimming contact plates 112, for example, so that the trimming contact plates 112 only generate a linear movement in the axial direction of the coil. The conventional linear guide structure is suitable for the present embodiment, for example, a slider-slide rail type guide structure, a guide rod-guide sleeve type guide structure, etc., and the specific structure is not described here.

In the case where the contact plate driving unit 113 is a linear driving device, it is preferable that each of the trimming contact plates 112 is provided with a plurality of sets of linear driving devices, so that the movable smoothness of the trimming contact plate 112 and the reliability of trimming centering operation can be ensured; the linear driving devices may be arranged in sequence in a transverse direction, which is a direction parallel to the horizontal direction and perpendicular to the axial direction of the steel coil.

Further, the linear driving device is provided with a linear displacement sensor, and preferably, each linear driving device is provided with a linear displacement sensor respectively, so that the driving quantity can be accurately controlled, and a better centering and deviation rectifying effect of the strip steel can be achieved.

Further preferably, a strip edge guiding structure is provided on the working plate surface of the trimming contact plate 112.

In this embodiment, the trimming support 111 drives the trimming contact plate 112 to contact with the end of the steel coil, and the strip steel edge guiding structure on the trimming contact plate 112 can better guide and restrict the strip steel edge, so as to prevent the strip steel from deviating in the process of rewinding or unreeling the steel coil, and achieve the effect of aligning the steel coil without generating defects such as edge cracks.

In one embodiment, as shown in fig. 4 and 5, the strip edge guide structure includes a plurality of guide members including universal ball bearings 114; the universal ball bearing 114 is suitable for rolling contact with the edge of the strip steel, and has small friction force between the two, so that the defect of the edge of the new strip steel can be avoided while the edge of the strip steel is guided and restrained, and the smoothness of rolling or unreeling of the steel coil is ensured.

Further, the universal ball bearing 114 is floatingly arranged on the trimming contact plate 112, based on which, not only the contact tightness and reliability between the universal ball bearing 114 and the steel coil can be ensured, but also the damping effect can be achieved, thereby protecting the strip steel and the trimming equipment of the steel coil.

In one embodiment, as shown in fig. 4, an equal number of floating grooves 1121 are formed on the work plate surface, each floating groove 1121 is configured in a one-to-one correspondence with each universal ball bearing 114, and the bearing seats of the universal ball bearings 114 are slidably disposed in the corresponding floating grooves 1121; the guide member further includes a floating spring 115, one end of the floating spring 115 abuts against the groove bottom of the corresponding floating groove 1121, and the other end is connected to the bearing housing of the corresponding universal ball bearing 114. The bearing seat and the groove wall of the floating groove 1121 are preferably in a clearance fit relationship, so that the bearing seat can be restrained to move only along the groove depth direction of the floating groove 1121 while ensuring the smoothness of the movement of the universal ball bearing 114.

When the device is used, the linear driving device drives the trimming contact plate 112 to contact a steel coil, the stroke of the floating spring 115 is compressed, and when the stroke parameter of the floating spring 115 is unchanged, the linear driving device controls the trimming contact plate 112 to retract by a distance k x a; wherein a is the maximum deformation of the spring allowed, k is the proportionality coefficient 0-1, and k can be adjusted according to the actual use condition; therefore, when the withdrawing distance is smaller than a, a certain pre-compression force can be applied to the strip steel surface of the steel coil, and the centering and deviation correcting effects are achieved.

In one embodiment, as shown in fig. 4 and fig. 5, the universal ball bearings 114 are distributed in multiple rows, and the bearing rows are sequentially arranged from top to bottom on the trimming contact plate 112, so that the universal ball bearings 114 are ensured to be contacted with the strip steel all the time in the coil unreeling/unreeling process, and the positioning precision requirement of the trimming contact plate 112 can be reduced.

Further, as shown in fig. 5, the universal ball bearings 114 of every two adjacent bearing rows are sequentially staggered; wherein the amount of misalignment is less than the diameter of the ball bearing 114. In this structure, through reasonable arrangement of the universal ball bearings 114, the diameter change condition in the coil unreeling/unreeling process and the moving path of the strip steel can be well adapted, and the continuous contact effect with the coil can be ensured, so that correction and trimming can be reliably performed.

Wherein, the proper number of the guide members and the deformation of the floating spring 115 can be selected according to the material variety, the thickness of the strip steel and other factors of the actually produced steel coil, so as to achieve the effect of aligning the steel coil without generating edge crack.

Example III

The embodiment of the invention provides a steel coil edge trimming device 1, which can be used in the first embodiment.

As shown in fig. 2 and 3, the coil trimming device 1 includes two sets of coil trimming modules 11, where the two sets of coil trimming modules 11 are respectively disposed on an operation side and a transmission side of the unit, and at least one set of coil trimming modules 11 adopts the coil trimming module 11 provided in the second embodiment.

Preferably, the two sets of coil trimming modules 11 are all coil trimming modules 11 provided in the second embodiment.

The two groups of steel coil trimming modules 11 are preferably controlled independently, so that the steel coil trimming operation can be performed more flexibly, and particularly various factors of steel coil rewinding misalignment can be dealt with, so that the reliability is higher.

Further preferably, as shown in fig. 2 and 3, the coil trimming device 1 further includes a lifting driving mechanism for driving the trimming support 111 to lift and/or a traversing driving mechanism for driving the trimming support 111 to traverse to approach or depart from the axis of the coil, so that the coil trimming module 11 can be laterally/vertically separated from the coil, and provide a required space for coil unreeling/unreeling operations, for example, avoiding interference with an uncoiler or the like.

Based on the transverse moving driving mechanism and the lifting driving mechanism, the position of the trimming contact plate 112 can be correspondingly adjusted along with the change of the diameter of the steel coil in the coil unreeling/unreeling process, so that the effect of self-adapting correction and trimming can be achieved.

In one embodiment, the traverse driving mechanism includes a traverse frame 131, a traverse rail for traversing the traverse frame 131, and a traverse driving unit 132 for driving the traverse frame 131 to move along the traverse rail. Wherein the traversing driving unit 132 includes, but is not limited to, driving devices employing traversing hydraulic cylinders, traversing cylinders, etc.; the traverse carriage 131 may be provided with traveling members such as traverse wheels so as to move on traverse rails.

In one embodiment, the lift drive mechanism includes a lift drive unit 141, the output of the lift drive unit 141 being connected to the trimming support 111. The lifting driving unit 141 includes, but is not limited to, a driving device employing a traversing hydraulic cylinder, a traversing cylinder, etc.

Preferably, the lift drive mechanism and the traverse drive mechanism are arranged simultaneously. Preferably, the lifting drive mechanism is arranged on the traversing carriage 131; further, a lifting guide structure 142 may be disposed on the traverse frame 131 to improve the stability of the lifting motion, and the lifting guide structure 142 may be a slider-slide rail type guide structure, a guide rod-guide sleeve type guide structure, or the like.

Wherein, the two groups of steel coil trimming modules 11 can be driven by the same group of transverse moving driving mechanisms; the two sets of steel coil trimming modules 11 are preferably driven by two sets of lifting driving mechanisms respectively, so that the two sets of lifting driving mechanisms and the two sets of steel coil trimming modules 11 are both arranged on the traverse frame 131.

Further, as shown in fig. 2, the steel coil trimming device 1 further includes a trimming frame 12, and a traversing driving mechanism and a lifting driving mechanism are disposed on the trimming frame 12.

Example IV

This embodiment optimizes the first embodiment described above.

In one of the embodiments, as shown in fig. 1, the strip unwinder mechanism comprises a lateral guide device 3 for lateral guide centering of the released strip or the strip to be reeled. The side guide device 3 is matched with the steel coil edge aligning device 1, so that the edge aligning and centering effect can be further improved.

In one of the embodiments, as shown in fig. 6, the sidecar 3 comprises an operating side centering plate 31 and a transmission side centering plate 32, the operating side centering plate 31 and the transmission side centering plate 32 being respectively provided with a centering driving mechanism 35 for driving them closer to or farther from the center line of the unit.

Wherein the operation side centering plate 31 and the transmission side centering plate 32 are used for contacting with the edge of the strip steel, so as to guide the strip steel to run and make the strip steel to run in a centering way. The faces of the two centering plates are preferably parallel to the vertical direction.

Preferably, the operation side centering plate 31 is mounted on an operation side mount 33, and the centering driving mechanism 35 of the side is connected to the operation side mount 33; the transmission-side centering plate 32 is mounted on a transmission-side mount 34, and the centering drive mechanism 35 of this side is connected to this transmission-side mount 34.

Further, as shown in fig. 6, the side guiding device 3 further includes a centering guide rod 36, and the operation side mounting seat 33 and the transmission side mounting seat 34 are slidably disposed on the centering guide rod 36, so that smoothness and centering accuracy of movement of the two centering plates can be improved.

The centering drive mechanism 35 includes, but is not limited to, a drive device using a centering hydraulic cylinder, a centering cylinder, or the like. The two sets of centering drive mechanisms 35 preferably operate independently of each other; preferably provided with a displacement sensor and can be controlled in connection with the displacement of the contact plate driving unit 113 at the coil edge aligning device 1.

Preferably, the operation side centering plate 31 and the transmission side centering plate 32 are enclosed to form a strip running channel, and both ends of the strip running channel are preferably bell-mouthed outwards, so that the strip head entering the strip running channel can be guided.

In one embodiment, the operation side centering plate 31 is floatingly mounted on the operation side mounting seat 33, and the transmission side centering plate 32 is floatingly mounted on the transmission side mounting seat 34, so that on one hand, the centering plate can adapt to the relative position change between the centering plate and the edge of the strip steel, and a pretightening force is always applied to the strip steel, so that the strip steel is reliably abutted against the edge of the strip steel, thereby ensuring the centering and deviation rectifying effect of the strip steel, and on the other hand, a damping effect can be achieved, and the friction force between the centering plate and the strip steel is reduced, thereby protecting the strip steel and the side guide device 3.

The operation side centering plate 31 may be made of polyurethane with a pre-compression spring or other flexible materials with a certain wear resistance.

Alternatively, a plurality of damper springs are provided between the operation side centering plate 31 and the operation side mount 33, and the axis of each damper spring is perpendicular to the operation side centering plate 31. Further, a plurality of spring guide rods are further arranged on the operation side centering plate 31, each buffer spring is sleeved on each spring guide rod in a one-to-one correspondence manner, and the other end of each spring guide rod penetrates through the operation side mounting seat 33 and is in threaded connection with a limit nut, so that when the operation side centering plate 31 moves relative to the operation side mounting seat 33, the spring guide rods can slide along the operation side mounting seat 33 to play a role in guiding, and the elastic acting force of each buffer spring is ensured to be perpendicular to the plate surface of the operation side centering plate 31, so that the centering deviation correcting effect is ensured.

The spring guide rod includes, but is not limited to, a pin shaft having one end fixed to the operation side centering plate 31, an intermediate body section having an optical axis section so as to slide with respect to the operation side mounting seat 33, and a tail end having a screw section so as to be screwed with the limit nut.

Further, the values of the predetermined gaps s and s between the operation side centering plate 31 and the operation side mounting seat 33 can be adjusted according to the variety and thickness of the strip steel, and in combination with the use condition of the field, the adjustment mode can be realized by adjusting the screw-connection position of the limit nut on the spring guide rod (namely, the purpose of adjusting the gaps s is achieved by screwing the limit nut).

In another embodiment, the operation side centering plate 31 adopts the structure of the trimming contact plate 112, that is, a plurality of guiding members are disposed on the operation side centering plate 31, and further details of the structure are not described herein; the structure can also obtain a better centering deviation correcting effect.

The mounting structure of the transmission side centering plate 32 is similar to that of the operation side centering plate 31, and thus a description thereof will be omitted.

During the coil winding and unwinding process, the side guide device 3 can adjust the stroke of the centering driving mechanism 35 to match with the centering stroke of the coil trimming device 1. The number of sideguides 3 may be set depending on the unwinding length and other equipment arrangement.

In one embodiment, the strip unwinding mechanism further comprises a magnetic belt conveyor 6, a steering roller 5 and the like, and the side guide 3 may be disposed between the magnetic belt conveyor 6 and the steering roller 5.

Example five

The embodiment of the invention relates to an operation method of the strip steel offline inspection station, which comprises the following steps:

when the steel coil 2 is unfolded, the steel coil edge aligning device 1 is abutted against the end face of the steel coil 2, and the deviated strip steel is corrected by the steel coil edge aligning device 1;

and/or, when the steel coil 2 is rewound, the steel coil edge aligning device 1 is abutted against the end face of the steel coil 2, and the end part of the steel coil 2 is aligned by the steel coil edge aligning device 1.

Based on the specific structure of the steel coil edge trimming device 1, correspondingly, when the steel coil is unfolded, the edge trimming contact plate 112 is abutted with the end surface of the steel coil, and the deviated strip steel is corrected through the edge trimming contact plate 112; and/or, when the steel coil is rewound, the trimming contact plate 112 is abutted against the end face of the steel coil, and the deviated strip steel is corrected through the trimming contact plate 112.

Wherein, preferably, when the steel coil is unfolded, the working position 100 of the steel coil trimming device 1/trimming contact plate 112 is arranged at the uncoiling position, namely the position where the strip steel leaves the steel coil; it is further preferred that at the working position 100, a part of the trimming contact plate 112 is in contact with the unopened steel coil, and a part is in contact with the edge of the strip steel which has left the steel coil, for example, the boundary point of the strip steel leaving the steel coil is located in the middle of the trimming contact plate 112 (for example, may be close to/coincide with the center of the trimming contact plate 112), so that a better centering effect can be achieved.

Wherein, preferably, when the steel coil is rewound, the working position 100 of the steel coil trimming device 1/trimming contact plate 112 is arranged at the coiling position, namely the position where the strip steel climbs the steel coil; it is further preferred that at the working station 100, a part of the trimming contact plate 112 is in contact with the coiled steel coil, and a part is in contact with the edge of the strip steel to be coiled, for example, the boundary point of the strip steel climbing up the coiled steel coil is located in the middle of the trimming contact plate 112 (for example, the center of the trimming contact plate 112 can be approached/overlapped), so that better trimming centering effect can be achieved.

In particular, based on the condition that the universal ball bearing 114 is floatingly arranged on the trimming contact plate 112, when the tape head sequentially extrudes the universal ball bearing 114 on the walking path in the initial stage of unwinding, the peripheral non-extruded or extrusion quantity smaller universal ball bearing 114 can reliably restrain and guide the tape head, and the effect of clamping and conveying the strip steel can be achieved to a certain extent, so that the unwinding of the steel coil is facilitated, and the damage to peripheral equipment caused by overlarge jump amplitude of the tape head is avoided. Similarly, at the end of the rewind, when the tail sequentially presses the ball bearings 114 on the travel path, the ball bearings 114 that are not pressed around or have a small amount of pressing can reliably restrain and guide the tail.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims (10)

1. The utility model provides a belted steel off-line inspection station, includes decoiler, uncoiling baffle and is located belted steel expansion mechanism of low reaches, its characterized in that: the pre-uncoiling machine is also provided with a steel coil edge aligning device which is used for carrying out edge aligning and deviation rectifying treatment on the steel coil during uncoiling and/or uncoiling.

2. The strip off-line inspection station of claim 1, wherein: the steel coil trimming device comprises two groups of steel coil trimming modules which are respectively arranged on the operation side of the unit and the transmission side of the unit; the steel coil trimming module comprises trimming Bian Zhi and trimming contact plates, wherein the trimming contact plates are movably arranged on the trimming support, and contact plate driving units for driving the trimming contact plates to switch between a contact position and a non-contact position are correspondingly arranged on the trimming support.

3. The strip off-line inspection station of claim 2, wherein: the working plate surface of the trimming contact plate is provided with a strip steel edge guiding structure, the strip steel edge guiding structure comprises a plurality of guiding members, and the guiding members comprise universal ball bearings.

4. The strip off-line inspection station of claim 3, wherein: the universal ball bearing is arranged on the trimming contact plate in a floating mode.

5. The strip off-line inspection station of claim 2, wherein: the steel coil trimming device further comprises a lifting driving mechanism for driving the trimming support to lift and/or a traversing driving mechanism for driving the trimming support to traverse so as to be close to or far away from the pre-uncoiler, wherein the traversing direction is perpendicular to the axis of the winding drum of the pre-uncoiler.

6. The strip off-line inspection station of claim 1, wherein: the strip steel unfolding mechanism comprises a side guide device for conducting side guide centering on the released strip steel or the strip steel to be reeled.

7. The strip off-line inspection station of claim 6, wherein: the side guide device comprises an operation side centering plate and a transmission side centering plate, and the operation side centering plate and the transmission side centering plate are respectively provided with a centering driving mechanism for driving the operation side centering plate to be close to or far away from the central line of the unit.

8. The strip off-line inspection station of claim 7, wherein: the operation side centering plate is floatingly mounted on the operation side mounting seat, and the transmission side centering plate is floatingly mounted on the transmission side mounting seat.

9. The method of operating a strip steel offline inspection station of any one of claims 1 to 8, wherein the method comprises:

when the steel coil is unfolded, the steel coil edge trimming device is abutted with the end face of the steel coil, and the deviated strip steel is corrected through the steel coil edge trimming device;

and/or when the steel coil is rewound, the steel coil edge aligning device is abutted with the end face of the steel coil, and the end part of the steel coil is aligned through the steel coil edge aligning device.

10. The method of claim 9, wherein: when the steel coil is unfolded, the working position of the steel coil trimming device is arranged at the uncoiling position; when the steel coil is rewound, the working position of the steel coil trimming device is arranged at the coiling position.