Continuous strip production line, strip cutting method and device thereof

Abstract

The present invention relates to a strip cutting method on a strip continuous production line, comprising the following steps: arranging a cutting head above the strip running channel; designing a running path for the cutting head so that the cutting head follows the strip in the strip length direction and makes a transverse cutting movement relative to the strip in the strip width direction; when the strip runs to a set position, the cutting head moves according to the designed running path of the cutting head to cut the strip. Accordingly, a strip cutting device on a strip continuous production line and a strip continuous production line are also provided. The present invention can realize the online continuous cutting operation of the strip on the strip continuous production line, without stopping shearing or flying shearing, ensuring the reliability and smoothness of strip production, and is particularly suitable for the online continuous cutting operation of high-strength steel plates.

Description

Technical Field

[0001] The present invention belongs to the technical field of strip production, and particularly relates to a strip continuous production line, a strip cutting method and device on the strip continuous production line. Background Art

[0002] In a continuous strip production line, in order to improve efficiency, stop shearing or flying shearing is generally used for strip slitting. However, for high-strength steel plates after quenching, the maximum tensile strength of the strip has reached 1800 MPa, and the flying shearing or stop shearing method cannot be used. At present, there is already a technical solution for cutting strips using a laser, but the laser cutting process generally also uses the stop shearing method, which affects the smooth progress of production. Summary of the Invention

[0003] The present invention relates to a strip continuous production line, a strip cutting method and device on the strip continuous production line, which can at least solve some defects of the prior art.

[0004] The present invention relates to a strip cutting method on a strip continuous production line, comprising the following steps:

[0005] Arranging a cutting head above the strip running channel;

[0006] Designing a running path of the cutting head so that the cutting head follows the strip in the length direction of the strip and makes a transverse cutting movement relative to the strip in the width direction of the strip;

[0007] When the strip runs to a set position, the cutting head moves according to the designed running path of the cutting head to cut the strip.

[0008] Preferably, the cutting head is a laser cutting head.

[0009] As one of the implementation manners, according to the running range of the cutting head defined by the running path of the cutting head under different working conditions, the strip running channel is divided into a cutting area and a non-cutting area, and a protection design is carried out on the strip conveying device in the cutting area.

[0010] As one of the implementation manners, in the cutting area, the conveying surface of the strip conveying device adapted to contact the strip is made of a material resistant to laser irradiation.

[0011] As one of the implementation manners, in the cutting area, the strip conveying device includes a plurality of conveying units arranged in sequence along the length direction of the strip running channel, and each conveying unit includes at least one first conveying roller installed on a driving roller shaft; when a plurality of first conveying rollers are installed on the driving roller shaft, the first conveying rollers are arranged at intervals in sequence on the driving roller shaft.

[0012] As one of the implementation manners, a plurality of second conveying rollers are installed on the shaft section of the driving roller shaft extending to the non-cutting area.

[0013] As one of the implementation manners, when cutting the strip steel, pressure is applied to the strip steel on both sides of the cutting seam to prevent the cut strip steel from rebounding upward.

[0014] The present invention relates to a strip steel cutting device on a strip steel continuous production line, comprising:

[0015] A cutting head arranged above the strip steel running channel, the cutting head being configured with a cutting head driving mechanism, the cutting head driving mechanism having a first driving stroke for driving the cutting head to move in the length direction of the strip steel running channel and a second driving stroke for driving the cutting head to move in the width direction of the strip steel running channel;

[0016] A controller, the controller being used for receiving a cutting instruction and controlling the cutting head driving mechanism to work when the strip steel runs to a set position so that the cutting head moves according to a preset cutting head running path and cuts the strip steel, the cutting head running path satisfying that the cutting head follows the strip steel in the length direction of the strip steel and makes a transverse cutting movement relative to the strip steel in the width direction of the strip steel.

[0017] Preferably, the cutting head is a laser cutting head.

[0018] The present invention also relates to a strip steel continuous production line, which uses the strip steel cutting method as described above to cut the strip steel at the strip steel cutting station, or is configured with the strip steel cutting device as described above at the strip steel cutting station.

[0019] The present invention has at least the following beneficial effects:

[0020] The present invention can realize the online continuous cutting operation of strip steel on a strip steel continuous production line, without stopping shearing or flying shearing, ensuring the reliability and smoothness of strip steel production, and is particularly suitable for the online continuous cutting operation of high-strength steel plates. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0022] Figure 1 It is a structural diagram of the equipment at the strip steel cutting station provided by the embodiment of the present invention;

[0023] Figure 2 It is a schematic structural diagram of the strip steel conveying device provided by the embodiment of the present invention;

[0024] Figure 3 The plan view of the strip conveying device provided by the embodiment of the present invention;

[0025] Figure 4 The structural schematic diagram of the strip pressing mechanism provided by the embodiment of the present invention;

[0026] Figure 5 The layout schematic diagram of the guide plate on the pressing frame provided by the embodiment of the present invention;

[0027] Figure 6 is Figure 5 the side view of. Detailed implementation manners

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] Embodiment 1

[0030] The embodiment of the present invention provides a strip cutting method on a strip continuous production line, including the following steps:

[0031] Arrange a cutting head 31 above the strip running channel;

[0032] Design the running path of the cutting head so that the cutting head 31 follows the strip in the length direction of the strip and makes a transverse cutting movement relative to the strip in the width direction of the strip;

[0033] When the strip runs to the set position, the cutting head 31 moves according to the designed running path of the cutting head to cut the strip.

[0034] Among them, a thermal cutting method or a water cutting method can be adopted. The thermal cutting method is preferably a laser cutting method. Correspondingly, the cutting head 31 is a laser cutting head; for the water cutting method, the cutting head 31 is correspondingly a water cutting head / water knife.

[0035] Obviously, the above-mentioned cutting head 31 needs to be able to move. Correspondingly, the cutting head 31 is configured with a cutting head driving mechanism, and the cutting head driving mechanism has a first driving stroke for driving the cutting head 31 to move in the length direction of the strip running channel and a second driving stroke for driving the cutting head 31 to move in the width direction of the strip running channel. In one embodiment, as Figure 1 , a gantry cutting machine is adopted, specifically including:

[0036] Main part of the machine tool: It includes a gantry 33 and a movable seat. The gantry 33 can slide along the length direction of the strip running channel to achieve the movement of the cutting head 31 in the X direction. The movable seat can traverse on the gantry 33 to achieve the movement of the cutting head 31 in the Y direction. Further, it can be set that the movable seat can move up and down relative to the gantry 33 to achieve the movement of the cutting head 31 in the Z direction, which can assist in focusing and improve the focusing efficiency and accuracy of the cutting head 31. The drive of the gantry 33 and the drive of the movable seat are preferably servo motors, which can be driven correctly and precisely according to the control program. The laser 32 is installed on the above-mentioned movable seat, and the laser emitted by the laser 32 is emitted from the cutting head 31 to the surface of the strip to achieve the strip cutting operation.

[0037] Numerical control system: Controls the main part of the machine tool to achieve the movement of the cutting head 31 in the X, Y, and Z directions, and also controls the output power of the laser 32.

[0038] Furthermore, the above-mentioned cutting machine further includes an exhaust and dust removal mechanism, which removes the soot and dust generated during processing and performs dust removal treatment to make the exhaust gas emissions meet the environmental protection requirements.

[0039] Furthermore, a waste collection unit is also provided below the strip conveying channel. The waste collection unit can be equipped with slag discharging equipment to facilitate the timely discharge of the collected waste.

[0040] Such as Figure 3 , since the cutting head 31 has both the movement in the strip length direction and the movement in the strip width direction, the running path of the cutting head presented is an oblique running path with an angle relative to the strip length direction.

[0041] Among them, the factors considered in the design of the above-mentioned cutting head running path mainly include strip specifications, strip running speed, cutting time, etc. The starting running position of the cutting head 31 can be determined by the strip specifications. The strip running speed mainly determines the X-direction moving speed of the cutting head 31. The cutting time requirement combined with the strip specifications can determine the Y-direction moving speed of the cutting head 31. For different working conditions, the cutting head running path will be different, but all cutting head running paths will be within the range of the two boundary running paths of the cutting head 31 (such as Figure 3 shown).

[0042] It can be understood that "making the cutting head 31 follow the strip in the strip length direction" means that the X-direction moving speed of the cutting head 31 needs to be consistent with the strip running speed. The strip running speed is controlled by the strip conveying device 1. Therefore, the cutting head drive mechanism can be interlocked with the strip conveying device 1 to ensure the above-mentioned following requirement and avoid causing strip waste.

[0043] Based on the above method, in this embodiment, the online continuous cutting operation of the strip on the strip continuous production line can be realized without stopping shearing or flying shearing, ensuring the reliability and smoothness of strip production, and is particularly suitable for the online continuous cutting operation of high-strength steel plates.

[0044] Further optimize the above method, such as Figure 3 , according to the cutting head operation range defined by the cutting head operation path under different working conditions, divide the strip running channel into a cutting area 101 and a non-cutting area 102, and conduct a protection design for the strip conveying device 1 in the cutting area 101. Based on this design, the strip conveying device 1 can be better protected, and a matching design for the strip conveying device 1 in the cutting area 101 and the non-cutting area 102 can effectively reduce the equipment cost and maintenance cost.

[0045] In one embodiment, in the cutting area 101, the conveying surface of the strip conveying device 1 adapted to contact the strip is made of a material resistant to laser irradiation, such as copper plating on the conveying surface or forming other material layers resistant to laser irradiation. The above structure can better protect the strip conveying device 1, avoid the laser passing through the strip and ablating the strip conveying device 1, and avoid the strip conveying device 1 having surface defects and affecting the strip surface quality.

[0046] In one embodiment, such as Figure 2 and Figure 3 , in the cutting area 101, the strip conveying device 1 includes a plurality of conveying units arranged in sequence along the length direction of the strip running channel, and each conveying unit includes at least one first conveying roller 12 installed on the driving roller shaft 11; when a plurality of first conveying rollers 12 are installed on the driving roller shaft 11, the first conveying rollers 12 are arranged at intervals in sequence on the driving roller shaft 11.

[0047] Arranging the first conveying rollers 12 at intervals can reduce the strip conveying equipment that may appear within the influence range of the cutting medium (such as the laser irradiation range), thereby correspondingly reducing the damage to the strip conveying device 1 during the strip cutting process. In addition, using the first conveying roller 12 as the conveying equipment, on the premise of ensuring the reliable conveying requirements for the strip, the replacement of the first conveying roller 12 is also very convenient. Just replace the defective first conveying roller 12 with a new standardized first conveying roller 12, avoiding the situation where the entire conveying roller needs to be replaced for traditional roller-type conveying equipment, and can reduce the maintenance cost; correspondingly, the first conveying roller 12 is detachably and fixedly installed on the driving roller shaft 11.

[0048] In the above solution of "the conveying surface is made of a material resistant to laser irradiation", correspondingly, the outer edge surface of the first conveying roller 12 is made of a material resistant to laser irradiation, which can also significantly reduce the consumption of the material resistant to laser irradiation required.

[0049] In one embodiment, as Figure 2 and Figure 3 , in the above-mentioned first conveying roller disc 12, the cross-section of the rim ring for contacting the strip steel is spindle-shaped, that is, the rim ring has a tapered structure from the inner ring to the outer ring. Based on this structure, the contact range between the first conveying roller disc 12 and the strip steel can be further reduced, that is, the area of the above-mentioned conveying surface is reduced, thereby reducing the damage caused by the cutting medium to the strip steel conveying equipment.

[0050] The above-mentioned first conveying roller disc 12 may further include a core ring, which is sleeved on the driving roller shaft 11, and the above-mentioned rim ring is sleeved on the core ring; wherein, the connection between the rim ring and the core ring is preferably detachable. For example, the two are connected by an adapter plate. The adapter plate and the rim ring can be connected by bolts or the like. The adapter plate can be welded and fixed on the core ring or can be fixed on the core ring by bolts. Based on the above structure, the maintenance of the first conveying roller disc 12 can be facilitated, that is, only the rim ring needs to be replaced, which can effectively reduce the maintenance cost.

[0051] Furthermore, as Figure 2 , in the cutting area 101, a protective tube 15 is sleeved on the exposed driving roller shaft 11 (that is, the roller shaft section without the first conveying roller disc 12 sleeved thereon) to prevent the cutting medium from damaging the driving roller shaft 11 during the cutting process, and further reduce the maintenance cost.

[0052] Further preferably, as Figure 2 and Figure 3 , a plurality of second conveying roller discs 13 are installed on the shaft section of the driving roller shaft 11 extending to the non-cutting area 102. The outer peripheral surface of the second conveying roller disc 13 is preferably a cylindrical ring surface, which has a relatively large contact area with the strip steel, ensuring the reliable conveying of the strip steel, and at the same time, the force uniformity of each shaft section of the driving roller shaft 11 can be improved, avoiding defects such as torsional deformation of the driving roller shaft 11.

[0053] Among them, the conveying roller discs on the driving roller shaft 11 are arranged at equal intervals to prevent the strip steel from running off track.

[0054] It can be understood that the axis of the above-mentioned driving roller shaft 11 is parallel to the width direction of the strip steel running channel. The first conveying roller disc 12 and the second conveying roller disc 13 are preferably coaxially installed on the driving roller shaft 11. The above-mentioned driving roller shaft 11 is connected with a conveying driving mechanism 14 for driving it to rotate around its own axis. The conveying driving mechanism 14 can adopt a gear motor or an electric motor, and preferably adopts a servo motor or a servo electric motor.

[0055] Preferably, the strip steel conveying device 1 before and after the cutting station also adopts the structural form of a driving roller shaft 11 sleeved with a plurality of conveying roller discs. In the length direction of the strip steel running channel, the driving roller shafts 11 are preferably arranged at equal intervals in sequence. Furthermore, as Figure 3, each group of conveying drive mechanisms 14 are respectively arranged on both sides of the strip conveying channel, and further preferably, there is a driving roller shaft 11 between two adjacent groups of conveying drive mechanisms 14 on the same side; based on this design, the strip running deviation can be effectively prevented.

[0056] In one embodiment, when cutting the strip, pressure is applied to the strip on both sides of the cutting seam to prevent the cut strip from rebounding upward, thereby better protecting the cutting equipment. A strip pressing mechanism 2 can be correspondingly configured. Among them, in order to cooperate with the operation of the strip and the operation of the cutting head 31, the pressing part of the strip pressing mechanism 2 should be able to keep following the strip.

[0057] In one embodiment, the above strip pressing mechanism 2 is configured with an X-direction driving structure. For example, a pressing frame 21 with a traveling mechanism is adopted and equipped with a traveling driving structure (such as a motor). The pressing frame 21 can share the X-direction guide rail with the gantry of the gantry cutting machine, or an X-direction guide rail can be separately configured for it; correspondingly, strip pressing mechanisms 2 need to be arranged on both the front and rear sides of the cutting machine. In another embodiment, the strip pressing mechanism 2 is integrally installed with the cutting machine. For example, the above pressing frame 21 is installed on the gantry 33 of the gantry cutting machine. Since the strip on both sides of the cutting seam needs to be pressed respectively, installation brackets can be arranged on both the front and rear sides of the gantry 33 for installing the pressing frame 21.

[0058] Preferably, as Figure 1 and Figure 4 , the above strip pressing mechanism 2 includes a pressure beam 22 and a pressing-down driving structure 23 for driving the pressure beam 22 to lift and lower. The pressing-down driving structure 23 can drive the pressure beam 22 to move between the working position and the standby position. In the working position, the pressure beam 22 presses against the surface of the strip, and the standby position is above the working position. Among them, the pressure beam 22 can adopt a pressing plate with a plate surface parallel to the horizontal plane. Of course, a pressing roller, etc. is also applicable to this embodiment. The above pressing-down driving structure 23 can adopt a linear driving device such as a cylinder or a hydraulic cylinder, or a driving method such as a motor + transmission component. The above pressing-down driving structure 23 is installed on the pressing frame 21 and connected to the pressure beam 22.

[0059] Preferably, as Figure 4 , a guiding structure is provided on the pressing frame 21 for guiding the lifting movement of the pressure beam 22 to improve the lifting smoothness and reliability of the pressure beam 22; the guiding structure can adopt the guiding method of a guiding rod 241 - guiding sleeve 242, or the guiding method of a guiding slide rail - guiding slider, and no detailed examples are given here. In this embodiment, as Figure 4 , a plurality of guiding rods 241 are installed on the pressure beam 22, and a plurality of guiding holes are correspondingly provided on the pressing frame 21; further, guiding sleeves 242 can be installed in the guiding holes. Preferably, at least part of the guiding sleeves 242 adopt self-lubricating sleeves.

[0060] Among them, an upper limit block can be set on the guide rod 241 to limit the descending stroke of the guide rod 241, thereby limiting the descending stroke of the pressure beam 22 and preventing the pressure beam 22 from separating from the clamping frame 21; a lower limit block can also be set on the guide rod 241 to limit the ascending stroke of the guide rod 241 and the pressure beam 22.

[0061] Furthermore, if Figure 4 The strip steel pressing mechanism 2 further includes a buffer structure, which is arranged between the pressing beam 22 and the pressing frame 21. On the one hand, it can improve the pressure adaptability when applying pressure to the strip steel, and on the other hand, it can effectively buffer the rebound force of the strip steel and reduce the impact on the pressing driving structure 23 and the like. In one embodiment, as Figure 4 The above-mentioned buffer structure includes a plurality of buffer springs 25, the top end of the buffer spring 25 abuts against the pressing frame 21, and the bottom end abuts against the pressing beam 22; in the above-mentioned scheme with the guide rod 241, the buffer spring 25 can be sleeved on the guide rod 241, which can constrain the buffer spring 25 to only perform vertical telescopic activities. Further, a plurality of sink grooves are provided at the bottom of the pressing frame 21, and the number of the sink grooves is the same as that of the buffer spring 25 and they are arranged one by one. The top end of the buffer spring 25 is accommodated in the corresponding sink groove, which can improve the stability and reliability of the vertical telescopic activities of the buffer spring 25; in the scheme with a plurality of guide holes provided on the pressing frame 21, the guide hole can correspondingly adopt a stepped hole with a narrow top and a wide bottom, and the large diameter hole section of the stepped hole constitutes the above-mentioned sink groove.

[0062] In one embodiment, if Figure 5 and Figure 6 A guide plate 26 is also provided on the clamping frame 21. The guide plate 26 is installed at the front end of the clamping frame 21 (that is, the end on the steel side). The bottom end of the guide plate 26 is preferably not higher than the horizontal plane where the pressure beam standby position is located. The bottom surface of the guide plate 26 is preferably an inclined guide surface, which is inclined downward from the front end to the rear end of the guide plate 26 (that is, the front end of the guide surface is located above the rear end). When the belt head passes through, the guide plate 26 can prevent the belt head from rising too much and damaging the pressure plate, and can assist in belt threading to improve production efficiency. In the case where the clamping frames 21 are respectively provided at the front and rear of the cutting machine, it is preferred that the guide plate 26 is only provided for the clamping frame 21 at the front side of the cutting machine.

[0063] In one embodiment, the pressure beam 22 is a beam body made of an electromagnet, or an electromagnet is provided on the pressure beam 22, and the control power supply of the electromagnet can be installed on the pressing frame 21, or can be connected to an external power supply through wiring of the pressing frame 21. Based on the above structure, when the pressure beam 22 is pressed down, the electromagnet is energized, so that the pressure beam 22 can be adsorbed and pressed against the surface of the strip, which significantly improves the pressing effect and operation synchronization of the strip.

[0064] Example 2

[0065] An embodiment of the present invention provides a strip cutting device on a strip continuous production line, including:

[0066] A cutting head 31 arranged above the strip running channel, the cutting head 31 is configured with a cutting head driving mechanism, and the cutting head driving mechanism has a first driving stroke for driving the cutting head 31 to move in the length direction of the strip running channel and a second driving stroke for driving the cutting head 31 to move in the width direction of the strip running channel;

[0067] A controller, the controller is used to receive a cutting instruction, and when the strip runs to a set position, control the cutting head driving mechanism to work so that the cutting head 31 moves according to a preset cutting head running path and cuts the strip, and the cutting head running path satisfies that the cutting head 31 follows the strip in the length direction of the strip and makes a transverse cutting movement relative to the strip in the width direction of the strip.

[0068] Wherein, the above controller can be integrated into the central control room of the production line.

[0069] The above cutting head 31 is preferably a laser cutting head.

[0070] For the relevant components and structures of the above strip cutting device, reference can be made to the relevant content in the above Example 1, which will not be elaborated here.

[0071] Example 3

[0072] An embodiment of the present invention provides a strip continuous production line, which uses the strip cutting method provided in the above Example 1 to cut the strip at the strip cutting station, or is configured with the strip cutting device provided in the above Example 2 at the strip cutting station.

[0073] Wherein, for the strip conveying device 1 used in the strip continuous production line, reference can be made to the relevant content in the above Example 1, which will not be elaborated here.

[0074] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A strip cutting method on a strip continuous production line, characterized in that, It includes the following steps: Arrange a cutting head above the strip running channel; Design the running path of the cutting head so that the cutting head follows the strip in the length direction of the strip and makes a transverse cutting movement relative to the strip in the width direction of the strip; When the strip runs to the set position, the cutting head moves according to the designed running path of the cutting head to cut the strip; The cutting head is a laser cutting head; According to the cutting head running range defined by the cutting head running path under different working conditions, divide the strip running channel into a cutting area and a non-cutting area, and carry out a protection design for the strip conveying device in the cutting area; In the cutting area, the strip conveying device includes a plurality of conveying units arranged in sequence along the length direction of the strip running channel. Each conveying unit includes at least one first conveying roller installed on a driving roller shaft; when a plurality of first conveying rollers are installed on the driving roller shaft, the first conveying rollers are arranged at intervals in sequence on the driving roller shaft; the cross-section of the rim ring of the first conveying roller for contacting the strip is spindle-shaped; A plurality of second conveying rollers are installed on the shaft section of the driving roller shaft extending to the non-cutting area, and the outer peripheral surface of the second conveying roller is a cylindrical ring surface.

2. The strip cutting method according to claim 1, characterized in that: In the cutting area, the conveying surface of the strip conveying device adapted to contact the strip is made of a material resistant to laser irradiation.

3. The strip cutting method according to claim 1, characterized in that: When cutting the strip, apply pressure to the strip on both sides of the cutting seam to prevent the cut strip from rebounding upwards.

4. A strip cutting device on a strip continuous production line, characterized in that, It includes: A cutting head arranged above the strip running channel, the cutting head is configured with a cutting head driving mechanism, and the cutting head driving mechanism has a first driving stroke for driving the cutting head to move in the length direction of the strip running channel and a second driving stroke for driving the cutting head to move in the width direction of the strip running channel; A controller, the controller is used to receive a cutting instruction, and when the strip runs to the set position, control the cutting head driving mechanism to work so that the cutting head moves according to a preset cutting head running path and cuts the strip, and the cutting head running path satisfies that the cutting head follows the strip in the length direction of the strip and makes a transverse cutting movement relative to the strip in the width direction of the strip; The cutting head is a laser cutting head; Wherein, according to the cutting head running range defined by the cutting head running path under different working conditions, divide the strip running channel into a cutting area and a non-cutting area, and carry out a protection design for the strip conveying device in the cutting area; In the cutting area, the strip conveying device includes a plurality of conveying units arranged in sequence along the length direction of the strip running channel. Each conveying unit includes at least one first conveying roller installed on a driving roller shaft; when a plurality of first conveying rollers are installed on the driving roller shaft, the first conveying rollers are arranged at intervals in sequence on the driving roller shaft; the cross-section of the rim ring of the first conveying roller for contacting the strip is spindle-shaped; A plurality of second conveying rollers are installed on the shaft section of the driving roller shaft extending to the non-cutting area, and the outer peripheral surface of the second conveying roller is a cylindrical ring surface.

5. A continuous strip production line, characterized in that: The strip steel is cut at the strip steel cutting station by using the strip steel cutting method according to any one of claims 1 to 3, or the strip steel cutting device according to claim 4 is arranged at the strip steel cutting station.

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