CN216965872U - Strip cast-rolling high-strength steel pulling and straightening production line - Google Patents

Abstract

The utility model provides a strip cast-rolling high-strength steel pulling and straightening production line which comprises an uncoiling system, a straightening machine, a head cutting device, a welding machine, a trimming device, a pulling and straightening system, an outlet shear and a coiling machine which are sequentially arranged, wherein the pulling and straightening system comprises a pulling and straightening machine and a multi-roll straightening machine which are sequentially arranged, a first tension roll is arranged between the pulling and straightening machine and the trimming device, and a second tension roll is arranged between the multi-roll straightening machine and the outlet shear. The utility model relieves the technical problem of unsatisfactory effect of improving the plate shape in the production of the thin-strip cast-rolled high-strength steel.

Description

Strip cast-rolling high-strength steel pulling and straightening production line

Technical Field

The utility model relates to the technical field of metallurgy, in particular to a thin strip cast-rolling high-strength steel pulling and straightening production line.

Background

The edge cutting and straightening process for the thin strip cast-rolled high-strength steel generally comprises the following steps: the strip steel is sent to an uncoiler through a coil conveying trolley, sent to a five-roller straight head machine through an uncoiler (usually a telescopic shovel head guide plate) for head straightening treatment, and the straightened strip head enters a head cutting machine to cut off an irregular head and then is sewn with the tail of the strip steel which is treated by the previous coil in a sewing machine (or welded at a welding machine); cutting transitional crescent moon at the edge of two rolls of strip steel with different plate widths by a crescent shear, sequentially passing through an inlet tension roller, a two-bend one-straightening withdrawal and straightening machine and an outlet tension roller, and straightening defects of the strip steel; the straightened strip steel is cut by a disc type edge cutting machine to remove the edge part of the strip steel, then the stitched part (or the welded part) is cut by a rear outlet, and the strip steel enters a coiling machine to be coiled, and finally the strip steel is conveyed to a steel coil finished product warehouse by a coil stripping trolley, a factory crane and the like.

At present, in the production of cast-rolled high-strength steel for thin strips, the incoming material has poor shape, and the edge waves and the camber are serious, so the effect of improving the shape is not ideal; since the edge quality problem is inevitable in the casting process, the thin strip cast-rolled high-strength steel is easy to break due to tension when being straightened. The design capability of the tension roll and the tension leveler is increased, the straightening effect of the strip steel is improved to a certain extent, but the effect is not obvious for high-strength steel, particularly ultra-high-strength steel, and the strip steel has defect resilience after tension leveling. For a tension leveler, the maximum tensile stress of the straightened strip steel generally occurs at the position of the central layer of the strip steel, and for high-strength steel, particularly ultrahigh-strength steel, when the strip steel is straightened by using a stretch bending straightener, the straightened strip steel can be warped to different degrees. Therefore, the technical problem that the effect of improving the plate shape is not ideal exists in the production of the thin-strip cast-rolled high-strength steel.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pulling and straightening production line for strip cast-rolling high-strength steel, which is used for relieving the technical problem of unsatisfactory effect of improving the plate shape in the production of the strip cast-rolling high-strength steel.

The above object of the present invention can be achieved by the following technical solutions:

the utility model provides a thin strip cast-rolling high-strength steel pulling and straightening production line which comprises an uncoiling system, a straightening machine, a head cutting device, a welding machine, a trimming device, a pulling and straightening system, an outlet shear and a coiling machine which are sequentially arranged, wherein the pulling and straightening system comprises a pulling and straightening machine and a multi-roll straightening machine which are sequentially arranged, a first tension roll is arranged between the pulling and straightening machine and the trimming device, and a second tension roll is arranged between the multi-roll straightening machine and the outlet shear; the tension leveler comprises a first bending roller set, a second bending roller set, a first straightening roller set and a second straightening roller set which are sequentially arranged; the vertical positions of the upper and lower rollers in the first bending roller group and the vertical positions of the upper and lower rollers in the second bending roller group are both adjustable; the vertical position of the lower straightening roller group in the first straightening roller group is adjustable, and the vertical position of the upper straightening roller group in the second straightening roller group is adjustable.

In a preferred embodiment, the first bending roller set is a quadruple roller set or a sextuple roller set, and the second bending roller set is a quadruple roller set or a sextuple roller set.

In a preferred embodiment, the multi-roll straightening is an 11-roll six-fold type.

In a preferred embodiment, the straightener is a nine-roll straightener comprising at least 4 inlet-side straightening rolls and at least 5 outlet-side straightening rolls, the diameter of the outlet-side straightening rolls being greater than the diameter of the inlet-side straightening rolls.

In a preferred embodiment, the trimming device comprises a crescent and a circle shear, which circle shear is arranged behind the crescent.

In a preferred embodiment, the rotary shears are in a turret structure, and the rotary shears are followed by a scrap cutter.

In a preferred embodiment, the thin strip cast-rolling high-strength steel straightening and drawing production line comprises at least two sets of uncoiling operation lines, each uncoiling operation line comprises an uncoiling system, a straightening machine and a head cutting device which are sequentially arranged, and the two sets of uncoiling operation lines are respectively connected with the welding machine.

In a preferred embodiment, the uncoiling system comprises an uncoiler and a clamp uncoiler, the clamp uncoiler being arranged after the uncoiler; the clamp type uncoiler comprises a clamp and a conveying mechanism, wherein the clamp can clamp the strip head of the strip steel, and the conveying mechanism can convey the clamp and the strip head of the strip steel to the next station.

In a preferred embodiment, the reel drum of the reel-up is provided with jaws and a pressure plate, the jaws being offset from the radial direction of the reel drum.

The utility model has the characteristics and advantages that:

in the production line, the edge cutting equipment is arranged in front of a withdrawal and straightening system, a first tension roll is positioned between a withdrawal and straightening machine and the edge cutting equipment, a second tension roll is positioned between a multi-roll straightening machine and an outlet shear, and strip steel sequentially enters each equipment; the multi-roller straightening is matched with a withdrawal straightening machine to treat the ultra-high-strength strip steel, buckling and warping of the ultra-thin strip steel covering high-strength steel and the ultra-high-strength steel after casting and rolling can be effectively eliminated, the plate shape flatness defect of the strip is corrected, residual internal stress is reduced, the plate shape defect of the ultra-thin strip steel and the ultra-high-strength steel after casting and rolling is effectively improved, and the configuration economic benefit and the input-output ratio of a production line are improved.

This production line has following advantage: (1) two sets of roll-system-type two-bending two-straightening withdrawal and straightening machines are configured, so that the two-bending two-straightening withdrawal and straightening machines can be flexibly applied to high-strength steel and ultrahigh-strength steel with different strength ranges, the withdrawal and straightening effects are better, and the strength range of the strip steel treated by the production line is enlarged; (2) the variable-diameter nine-roller straightener is applied, so that the head and the tail of the strip steel can be straightened more effectively, the time is saved, and the failure rate is reduced; (3) the turret type rotary shear scrap chopper is configured, so that the problem that high-strength steel and ultrahigh-strength steel are easy to block due to tool expense is solved, the tool changing time can be greatly shortened, and the tool changing downtime of a production line is reduced; (4) the clamp type uncoiler is arranged, so that the belt head can be accurately and smoothly conveyed to the nine-roller straightener, and the blocking fault is reduced; (5) two reeling machine auxiliary reeling modes are configured, so that the production line is suitable for larger range of the thickness and the strength of the strip steel.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a strip cast-rolling high-strength steel straightening and withdrawal production line provided by the utility model;

FIG. 2 is a schematic connection diagram of a strip cast-rolling high-strength steel straightening and withdrawal production line provided by the utility model;

FIG. 3 is a schematic structural view of a withdrawal and straightening machine in the strip cast-rolling high-strength steel withdrawal and straightening production line provided by the utility model;

FIG. 4 is a schematic view showing the construction of a sextuple roll set in the withdrawal straightening machine shown in FIG. 3;

FIG. 5 is a schematic structural diagram of a straight head machine in the strip casting and rolling high-strength steel straightening and withdrawal production line provided by the utility model;

FIG. 6 is a schematic structural diagram of a circle shear in the strip casting and rolling high-strength steel straightening and drawing production line provided by the utility model;

fig. 7 is a partial enlarged view of a portion a in fig. 6;

FIG. 8 is a schematic structural view of a clamp-type uncoiler in a thin strip cast-rolling high-strength steel straightening and drawing production line provided by the utility model;

FIG. 9 is a schematic structural diagram of an embodiment of a winding drum of a coiler in a thin strip cast-rolling high-strength steel straightening and drawing line provided by the utility model;

FIG. 10 is a schematic structural diagram of a belt wrapper in a thin strip cast-rolling high-strength steel straightening and withdrawal production line provided by the utility model.

The reference numbers illustrate:

10. an uncoiling system; 11. an uncoiler;

12. a clamp-type uncoiler;

13. clamping; 131. pressing head of strip steel; 132. a shovel head guide plate; 141. a first hydraulic cylinder; 142. a second hydraulic cylinder;

15. a conveyance mechanism; 151. a third hydraulic cylinder; 152. a fourth hydraulic cylinder;

20. a head straightening machine; 201. a nine-roll straightener; 21. an inlet-side straightening roll; 22. an outlet-side straightening roll; 23. a fifth hydraulic cylinder; 24. an upper straightening roll vertical position adjusting device; 25. moving a steel wire;

31. head cutting equipment; 301. double-layer shearing; 32. uncoiling the operating line;

40. a welding machine;

50. trimming equipment; 51. crescent scissors;

52. a circle shear; 521. an online cutter head is arranged; 522. an offline cutter head; 531. a first motor; 532. a second motor; 54. a drive motor; 55. a track;

60. a withdrawal and straightening system;

61. a withdrawal and straightening machine; 611. a first bending roller set; 612. a second bending roller set; 613. a sextuple roll set; 621. a first straightener roll group; 622. a second straightener roll group;

63. correcting with multiple rollers;

71. shearing an outlet;

72. a coiler; 721. a winding drum; 722. a jaw; 723. pressing a plate;

73. a belt wrapper; 731. a sixth hydraulic cylinder; 732. a seventh hydraulic cylinder; 733. an eighth hydraulic cylinder; 734. a belt; 735. a guide plate;

81. a first tension roller; 82. a second tension roller; 83. a third tension roller; 84. a fourth tension roller; 85. the running direction of the strip steel.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model provides a strip cast-rolling high-strength steel pulling and straightening production line, which comprises an uncoiling system 10, a straight head machine 20, a head cutting device 31, a welding machine 40, an edge cutting device 50, a pulling and straightening system 60, an outlet shear 71 and a coiling machine 72 which are sequentially arranged, wherein the pulling and straightening system 60 comprises a pulling and straightening machine 61 and a multi-roll straightening machine 63 which are sequentially arranged, a first tension roll 81 is arranged between the pulling and straightening machine 61 and the edge cutting device 50, and a second tension roll 82 is arranged between the multi-roll straightening machine 63 and the outlet shear 71.

In the production line, the edge cutting equipment 50 is arranged in front of the withdrawal and straightening system 60, the first tension roller 81 is positioned between the withdrawal and straightening machine 61 and the edge cutting equipment 50, the second tension roller 82 is positioned between the multi-roller straightening machine 63 and the outlet shear 71, the multi-roller straightening machine 63 is matched with the withdrawal and straightening machine 61 to process ultra-high-strength strip steel, the strip steel sequentially enters each equipment, and through the strip casting and rolling high-strength steel withdrawal and straightening production line, buckling and warping of the ultra-thin strip steel after casting and rolling covering high-strength steel and ultra-high-strength steel can be effectively eliminated, the plate shape straightness defect of the strip steel is corrected, residual internal stress is reduced, and the plate shape defects of the ultra-thin strip steel and the ultra-high-strength steel after casting and rolling are effectively improved.

In one embodiment, the withdrawal straightening machine 61 includes a first bending roller group 611, a second bending roller group 612, a first straightening roller group 621, and a second straightening roller group 622, which are arranged in this order; the vertical positions of the upper and lower rollers in the first bending roller group 611 and the vertical positions of the upper and lower rollers in the second bending roller group 612 are both adjustable; the vertical position of the lower straightener roll group in the first straightener roll group 621 is adjustable, and the vertical position of the upper straightener roll group in the second straightener roll group 622 is adjustable. As shown in fig. 3, the withdrawal and straightening machine 61 is a two-bending two-straightening withdrawal and straightening machine 61 with two sets of roller systems, and can be flexibly applied to high-strength steel and ultrahigh-strength steel with different strength ranges, so that the withdrawal and straightening effects are better, the large-range coverage of strip steel with different plate thicknesses and tensile strengths is realized, and the strength range of the strip steel processed by the production line is enlarged.

The first bending roller set 611 is a quadruple or a sixfold roller set 613 and the second bending roller set 612 is a quadruple or a sixfold roller set 613. The first bending roller group 611 and the second bending roller group 612 in the withdrawal straightening unit 61 shown in fig. 3 are each a quadruple roller group. The first bending roller group 611, the second bending roller group 612, the first straightening roller group 621 and the second straightening roller group 622 can be individually replaced by a quick roller changing device on the machine side. Further, as shown in fig. 3 and 4, the first bending roller set 611 and the second bending roller set 612 are further provided with a six-fold roller set 613, when the production line is used for processing ultra-high-strength strip steel with relatively high strength, the six-fold bending roller set can be put into use in advance through a quick roller changing device, the withdrawal and straightening machine 61 is of a two-bending two-straightening type, the bending rollers are provided with a six-fold small roller system and a four-fold two roller system, and the two different roller diameters can meet the withdrawal and straightening processes of strip steel with different material thicknesses.

In one embodiment, the multi-roller straightening 63 is an 11-roller six-fold type, and the multi-roller straightening 63 is matched with the tension leveler 61 to process the ultrahigh-strength steel strip, so that the straightening effect of the ultrahigh-strength steel is effectively improved.

The straightening head machine 20 may be a nine-roll straightening machine 201, and the nine-roll straightening machine 201 includes at least 4 inlet-side straightening rolls 21 and at least 5 outlet-side straightening rolls 22, and the roll diameter of the outlet-side straightening rolls 22 is larger than that of the inlet-side straightening rolls 21. As shown in FIG. 5, the strip steel enters the nine-roller straightening machine 201 along the steel wire 25, and the nine-roller straightening machine 201 adopts a roller diameter changing mode, so that the head and the tail of the strip steel can be more effectively straightened, the time is saved, the failure rate is reduced, and the straightening effect of the high-strength steel and the head and the tail of the ultrahigh-strength steel strip is guaranteed. The nine-roll straightener 201 comprises a fifth hydraulic cylinder 23 and an upper straightener roll vertical position adjusting device 24, the fifth hydraulic cylinder 23 can control the opening degree of the straightener according to the strip head condition of the strip steel, and the upper straightener roll vertical position adjusting device 24 can independently adjust 4 upper straightener rolls in the drawing 3.

In one embodiment, the trimming device 50 comprises a crescent 51 and a circle shear 52, the circle shear 52 being arranged behind the crescent 51. The edge cutting process is advanced to the front of the tension leveler 61, the fault of strip breakage during tension leveling is solved to a certain extent, the quality of the edge of the cast and rolled strip steel is poor, and due to the fact that the material strength is high, the disc shear 52 is broken edge shear and needs tool changing frequently, the broken edge shear is clamped steel frequently, the fault rate is high, and normal production of a production line is affected. Further, the disc shear 52 is of a turret type structure, the scrap shears are configured behind the disc shear 52, the cutter changing time can be greatly shortened aiming at the problems that the high-strength steel and the ultrahigh-strength steel are easy to block due to the expense of cutters, the loss of the cutting edges is high, and the field failure rate is high, the efficiency of quickly putting the second set of cutting edge device into the shearing machine after the fault is effectively improved, and the downtime of a production line due to cutter changing is reduced. As shown in fig. 6 and 7, the rotary cutter 52 includes an online up-down cutter 521, an offline cutter 522 and a driving motor 54, and the online up-down cutter 521 is driven by a first motor 531 and a second motor 532 respectively; the off-line cutter head 522 can rotate through the driving motor 54, is changed with the on-line cutter head in a rotating way and is put into online use; the turret circle shears 52 on both sides can be moved integrally on the rails 55 by motor drive. The edge trimmers are similar in structure to the circle shears 52 and will not be described in detail herein.

As shown in fig. 1 and 2, a third tension roller 83 is arranged in front of the crescent shears 51, a fourth tension roller 84 is arranged in front of the exit shears 71, the requirements of different tensions used by each device of the unit are met through the third tension roller 83, the first tension roller 81, the second tension roller 82 and the fourth tension roller 84, the tension value at the withdrawal and straightening machine 61 can reach 65t or above, and the problem of insufficient design capability of the entry and exit tension rollers is solved.

Due to the material characteristics of the high-strength steel, the conventional shovel head guide plate is difficult to guide the belt head into the straight head machine 20; a shovel head guide plate with a magnetic absorption function is arranged at the outlet of the uncoiler 11, so that the problem that high-strength steel is difficult to be introduced into a straight head machine is solved to a certain extent, but the shovel head guide plate is not ideal for the ultra-high-strength steel. To this end, the inventors have further developed an unwinding system 10: the uncoiling system 10 comprises an uncoiler 11 and a clamp type uncoiler 12, wherein the clamp type uncoiler 12 is arranged behind the uncoiler 11; the clamp-type uncoiler 12 includes a clamp 13 and a transport mechanism 15, the clamp 13 can clamp the strip end of the strip steel, and the transport mechanism 15 can transport the clamp 13 and the strip end of the strip steel to the next station, ensuring effective and accurate transport to the nine-roll straightener 201. As shown in fig. 8, the clamp 13 includes a strip head 131, a blade guide 132, a first hydraulic cylinder 141 and a second hydraulic cylinder 142, and the transport mechanism 15 includes a third hydraulic cylinder 151 and a fourth hydraulic cylinder 152, and can clamp the strip head by the cooperation of the first hydraulic cylinder 141 and the second hydraulic cylinder 142 with the blade guide 132, and then feed the strip head to a corresponding position by the third hydraulic cylinder 151 and the fourth hydraulic cylinder 152.

In one embodiment, the winding drum 721 of the coiling machine 72 is provided with a jaw 722 and a pressing plate 723, as shown in fig. 9, the jaw 722 is deviated from the radial direction of the winding drum 721 and used for threading of thick high-strength steel or ultra-high-strength steel with relatively high strength, when strip steel enters the jaw 722 during threading, the pressing plate 723 is driven by a hydraulic cylinder to extend and press a strip head, the winding drum 721 starts to rotate slowly to bite the strip head, and after several turns, the winding drum 721 expands and contracts the cylinder to enter a normal working state.

In another embodiment, the coiler 72 is provided with a belt wrapper 73 for coiling the relatively thin high-strength steel, as shown in fig. 10, when the strip is threaded to the coiler 72, a sixth hydraulic cylinder 731 drives the wrapper to move integrally to the reel 721, after the sixth hydraulic cylinder 733 is extended to make the belt 734 embrace the reel 721, wherein a seventh hydraulic cylinder 732 is used for tensioning the belt 734, a guide plate 735 is used for smoothly guiding the strip head into the gap between the reel 721 and the belt 734, the corresponding position of the guide plate 735 can be adjusted by the hydraulic cylinders, after several turns of wrapper, the reel 721 of the coiler 72 is expanded to a large diameter, the eighth hydraulic cylinder 733 is retracted to open the belt 734, the sixth hydraulic cylinder 731 is retracted, and the belt wrapper 73 is retracted to one side to complete a cycle of work.

The inventor further improves the strip cast-rolling high-strength steel pulling and straightening production line: as shown in fig. 1, the strip casting and rolling high-strength steel straightening and drawing production line comprises at least two sets of uncoiling operation lines 32, wherein the uncoiling operation lines 32 comprise an uncoiling system 10, a straightening machine 20 and a head cutting device 31 which are sequentially arranged, and the two sets of uncoiling operation lines 32 are respectively connected with a welding machine 40. The crop-end equipment 31 is preferably a double shear 301.

The raw steel coil is transported to a winding drum 721 of an uncoiler 11 by an upper coiling car, the head of the strip steel passes through an inlet pinch roll with the help of a clamp 13, and after the head of the strip steel is straightened by a nine-roll straightener 201, the strip steel is sent to a double-layer shear 301, and the head and unqualified parts of the strip steel are cut off; the cut strip steel is sent to a welder 40 to be welded with the tail of the previous strip steel. The nine-roller straightener 201 straightens the tail of the previous steel coil, an entry shear behind the nine-roller straightener 201 cuts off the tail and the out-of-tolerance part of the strip steel, and the strip steel runs to the welding machine 40 at the threading speed after being cut off; meanwhile, the steel coil in the other uncoiling operation line 32 is threaded and the head of the steel coil is cut, and welding with the tail of the coiled steel coil is waited at the position of the gathering pinch roll, so that the production efficiency is favorably improved.

After the welding is finished, the strip steel sequentially enters a third tension roller 83, a deviation correcting roller, a stabilizing roller, a circle shear front crescent shear, a circle shear 52, a first tension roller 81, a tension leveler 61, a multi-roller straightening 63, a second tension roller 82 and a fourth tension roller 84, then reaches an outlet shear 71, a welding seam is cut off, and the strip steel is coiled after corresponding coiling treatment. As shown in fig. 1, the production line is arranged with two sets of winders 72.

In one embodiment, the number of rolls of the multi-roll straightening 63 immediately after the two-bend two-straightening withdrawal straightening machine 61 may be 11 or more, and the form of the multi-roll straightening 63 may be a quadruple type. In one embodiment, the fourth tension roller 84 before the exit shears 71 may be omitted. In one embodiment, the number of rolls of the straight head machine 20 may be 7 rolls or more.

In the production line shown in fig. 1, a clamp-type uncoiler 12 is arranged behind an uncoiler 11, the head of the strip steel is clamped by a hydraulic cylinder, and then the head of the strip steel can be conveyed to the next equipment by swinging the hydraulic cylinder. The straightening machine 20 may be a nine-roll straightening machine 201, the nine-roll straightening machine 201 is disposed behind the uncoiler, the upper roll is provided with 4 straightening rolls, the lower roll is provided with 5 straightening rolls, and the roll diameter of the inlet provided with 4 straightening rolls (two upper rolls and two lower rolls) is smaller than that of the outlet provided with 5 rolls. The disc shear scrap cutter is arranged in front of the withdrawal and straightening machine 61 and is in a turret type, and the disc shear scrap cutter has the function of independently adjusting the width on one side. The tension leveler 61 is arranged after the disc shear is cut into pieces, the tension leveler 61 is of a two-bending two-straightening type, a bending roll is matched with a six-fold type small roll system and a four-fold type two roll system, and the diameter of the bending roll of the small roll system is less than or equal to 45 mm. After the multi-roller straightening machine 63 is closely followed by the tension straightening machine 61, between two groups of tension rollers, the multi-roller straightening machine 63 is a six-roller type straightening machine with at least 11 rollers, and the straightening force is at least 250t and above. The setting positions of the tension rollers are respectively in front of the circle shear 52, in front of and behind the tension leveler 61 and in front of the outlet shear 71. The maximum tension value of the rear tension roll of the withdrawal and straightening machine 61 can reach 65t and above. The coiler 72 is equipped with two types of wrapper: the spool 721 carries a jaw 722 or belt wrapper 73.

The production line is improved by integrating various measures according to the material performance characteristics of high-strength steel and ultrahigh-strength steel, and the production line cost is not increased by improving the pre-tensioning capacity of the tension roller. Along the strip steel running direction 85, strip steel sequentially enters an uncoiler 11, a clamp type uncoiler 12, a nine-roller straightener 201, a double-layer shear 301, a welding machine 40, a front tension roller of a disc shear 52, a crescent shear 51, a disc shear 52, a scrap shear, a front tension roller of a tension leveler 61, a multi-roller straightener 63, a rear tension roller of the tension leveler 61, a front tension roller of an outlet shear 71, an outlet shear 71 and a coiler 72, the strip shape defects of cast and rolled ultrathin strip high-strength steel and ultrahigh-strength steel can be effectively improved, the production line configuration has high economic benefit, and the input-output ratio is high.

The above description is only a few embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention according to the disclosure of the application document without departing from the spirit and scope of the present invention.

Claims (9)

1. The strip cast-rolling high-strength steel pulling and straightening production line is characterized by comprising an uncoiling system, a straightening machine, a head cutting device, a welding machine, a trimming device, a pulling and straightening system, an outlet shear and a coiling machine which are sequentially arranged, wherein the pulling and straightening system comprises a pulling and straightening machine and a multi-roll straightening machine which are sequentially arranged, a first tension roll is arranged between the pulling and straightening machine and the trimming device, and a second tension roll is arranged between the multi-roll straightening machine and the outlet shear;

the tension leveler comprises a first bending roller set, a second bending roller set, a first straightening roller set and a second straightening roller set which are sequentially arranged;

the vertical positions of the upper and lower rollers in the first bending roller group and the vertical positions of the upper and lower rollers in the second bending roller group are both adjustable;

the vertical position of the lower straightening roller group in the first straightening roller group is adjustable, and the vertical position of the upper straightening roller group in the second straightening roller group is adjustable.

2. The strip cast-rolling high-strength steel pulling and straightening production line according to claim 1, characterized in that the first bending roller group is a quadruple roller group or a sextuple roller group, and the second bending roller group is a quadruple roller group or a sextuple roller group.

3. The strip cast-rolling high-strength steel pulling straightening production line according to claim 1, characterized in that the multi-roll straightening is of an 11-roll six-pass type.

4. The strip cast-rolling high-strength steel pulling and straightening line as claimed in claim 1, wherein the head straightener is a nine-roll straightener, the nine-roll straightener comprises at least 4 inlet-side straightening rolls and at least 5 outlet-side straightening rolls, and the roll diameter of the outlet-side straightening rolls is larger than that of the inlet-side straightening rolls.

5. The strip cast-rolling high-strength steel pulling and straightening production line according to claim 1, characterized in that the edge cutting equipment comprises a crescent shear and a circle shear, and the circle shear is arranged behind the crescent shear.

6. The strip cast-rolling high-strength steel pulling-straightening production line according to claim 5, wherein the circle shear is in a turret structure, and a scrap cutter is arranged behind the circle shear.

7. The strip cast-rolling high-strength steel straightening and withdrawing production line according to claim 1, wherein the strip cast-rolling high-strength steel straightening and withdrawing production line comprises at least two groups of uncoiling operation lines, each uncoiling operation line comprises an uncoiling system, a straightening machine and a head cutting device which are sequentially arranged, and the two groups of uncoiling operation lines are respectively connected with the welding machines.

8. The strip cast-rolling high-strength steel straightening and withdrawal line according to claim 7, characterized in that the uncoiling system comprises an uncoiler and a clamp uncoiler, the clamp uncoiler being arranged after the uncoiler;

the clamp type uncoiler comprises a clamp and a conveying mechanism, wherein the clamp can clamp the strip head of the strip steel, and the conveying mechanism can convey the clamp and the strip head of the strip steel to the next station.

9. The strip cast-rolling high-strength steel straightening and withdrawal line according to claim 1, characterized in that a reel of the coiler is provided with a jaw and a pressing plate, wherein the jaw is deviated from the radial direction of the reel.

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