CN114535359A - Strip cast-rolling high-strength steel leveling production line and leveling process - Google Patents
Strip cast-rolling high-strength steel leveling production line and leveling process Download PDFInfo
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- CN114535359A CN114535359A CN202210337788.XA CN202210337788A CN114535359A CN 114535359 A CN114535359 A CN 114535359A CN 202210337788 A CN202210337788 A CN 202210337788A CN 114535359 A CN114535359 A CN 114535359A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/26—Special arrangements with regard to simultaneous or subsequent treatment of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/05—Stretching combined with rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D19/00—Shearing machines or shearing devices cutting by rotary discs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D31/00—Shearing machines or shearing devices covered by none or more than one of the groups B23D15/00 - B23D29/00; Combinations of shearing machines
- B23D31/04—Shearing machines or shearing devices covered by none or more than one of the groups B23D15/00 - B23D29/00; Combinations of shearing machines for trimming stock combined with devices for shredding scrap
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/04—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass for both machining and other metal-working operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/06—Metal-working plant comprising a number of associated machines or apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
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Abstract
The invention provides a strip cast-rolling high-strength steel leveling production line and a leveling process, wherein the strip cast-rolling high-strength steel leveling production line comprises an uncoiler, a welding machine, a first tension roller, trimming equipment, a second tension roller, a leveling system, a third tension roller, an outlet shear and a coiler which are sequentially arranged; the leveling system comprises a leveling machine and a withdrawal and straightening machine, and the withdrawal and straightening machine is arranged behind the leveling machine; the tension leveler comprises a straightening transverse bending roller set, a straightening longitudinal bending roller set and at least two bending roller sets. The invention solves the technical problems of poor leveling effect and difficulty in effectively improving the strip shape defect in the production of the strip cast-rolled high-strength steel.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a strip cast-rolling high-strength steel leveling production line and a leveling process.
Background
In the production of thin strip cast-rolled silicon steel, strip steel is conveyed to an uncoiler through a coil conveying trolley, and is conveyed to a five-roller straight head machine through an uncoiler for head straightening treatment, the straightened head enters a head cutter to cut off an irregular head, and the uncoiler is usually a telescopic shovel head guide plate; then sewing the tail part of the processed strip steel with the front roll of the strip steel in a sewing machine (or welding the tail part of the processed strip steel with the front roll of the strip steel at a welding machine), and cutting the edge parts of the two rolls of strip steel with different plate widths into transition crescent moon by a crescent shear; then the strip steel defect straightening treatment is carried out through an inlet tension roller, a two-bending one-straightening withdrawal straightening machine and an outlet tension roller in sequence, if the production line is provided with a sewing machine, after a sewing position is identified through a detection instrument, the tension roller and the withdrawal straightening machine roller need to lift empty strip steel; the edge of the straightened strip steel is cut by a disc type edge cutting device to remove the edge of the strip steel; then, the sewed part (or the welded part) is cut off from a rear outlet, and the cut part enters a coiling machine to be coiled, and finally the coiled coil is conveyed to a coil finished product warehouse through a coil stripping trolley, a factory crane and the like.
The production of the cast-rolled ultra-thin strip has the following defects: (1) as the incoming material is cast-rolled ultrathin strip steel, the strip shape is poor, the ribbing, the surface roughness is high, the edge waves and the camber are serious, and the strip shape improving effect by configuring the conventional tension leveler is not ideal; (2) since the quality problem of the edge part is inevitable in the casting process, if the steel strip is straightened according to the conventional tension, the thin steel strip is easy to be torn due to the tension.
Aiming at the unfavorable conditions, the design capacities of the tension roller and the tension leveler are increased, the leveling effect of the strip steel is improved to a certain extent, the strip shape defect of the strip steel can be improved, but the effect on cast-rolled ultrathin strip silicon steel is not obvious, the problems of high roughness, large thickness error and rib forming on the surface of the cast-rolled ultrathin strip silicon steel plate cannot be solved, and the stress of the annealed steel plate is improved. Therefore, the technical problems that the leveling effect is poor and the strip shape defect is difficult to effectively improve exist in the production of the strip cast-rolled high-strength steel.
Disclosure of Invention
The invention aims to provide a strip cast-rolling high-strength steel flattening production line and a flattening process, and aims to solve the technical problems that the flattening effect is poor and the strip shape defect of strip steel is difficult to effectively improve 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 invention provides a thin strip cast-rolling high-strength steel leveling production line which comprises an uncoiler, a welding machine, a first tension roller, trimming equipment, a second tension roller, a leveling system, a third tension roller, an outlet shear and a coiler which are sequentially arranged; the leveling system comprises a leveling machine and a withdrawal and straightening machine, and the withdrawal and straightening machine is arranged behind the leveling machine; the tension leveler comprises a straightening transverse bending roller set, a straightening longitudinal bending roller set and at least two bending roller sets.
In a preferred embodiment, the leveler is of a quadruple configuration.
In a preferred embodiment, the set of bending rollers is a quadruple set of rollers or a sextuple set of rollers.
In a preferred embodiment, the trimming device comprises an edge heating device and a trimming disk shear, the edge heating device being arranged upstream of the trimming disk shear.
In a preferred embodiment, the trimming rotary shears are of a turret type construction, and the trimming rotary shears are followed by a shear chopper.
In a preferred embodiment, the thin strip cast-rolling high-strength steel leveling production line comprises a straight head machine and a double-layer shear, wherein the double-layer shear is arranged behind the straight head machine, and the straight head machine is a nine-roller straightening machine.
In a preferred embodiment, the thin strip casting and rolling high-strength steel leveling production line comprises at least two sets of uncoiling operation lines, each uncoiling operation line comprises an uncoiler, a straight head machine and a double-layer shear which are sequentially arranged, and the two sets of uncoiling operation lines are respectively connected with the welding machine.
In a preferred embodiment, a fourth tension roll is arranged between the leveler and the withdrawal and straightening unit.
The invention provides a strip cast-rolling high-strength steel flattening process, which adopts the strip cast-rolling high-strength steel flattening production line, wherein the strip cast-rolling high-strength steel is sequentially processed by an uncoiler, a welding machine, a first tension roller, a trimming device, a second tension roller, a flattening system, a third tension roller, an outlet shear and a coiler.
The invention has the characteristics and advantages that:
in the production line, the thin strip cast-rolled high-strength steel sequentially enters a temper mill and a tension leveler for carrying out temper treatment after penetrating out of a second tension roller, then enters a third tension roller, the temper mill and the tension leveler are matched with each other to improve the plate shape and the plate thickness error, so that the plate shape defects of the cast-rolled ultrathin strip steel and the super-cast-rolled ultrathin strip silicon steel can be effectively improved, the problems of high roughness, large thickness error, plate surface ribbing, steel plate stress lifting after annealing and the like of the cast-rolled ultrathin strip steel and the super-cast-rolled ultrathin strip silicon steel can be eliminated, the plate shape flatness defect of the strip is corrected, and the residual internal stress is reduced.
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 casting and rolling high-strength steel leveling production line provided by the invention;
FIG. 2 is a flow chart of a strip casting and rolling high-strength steel leveling production line provided by the invention;
FIG. 3 is a schematic structural diagram of a leveler in the thin strip casting and rolling high-strength steel leveling production line provided by the invention;
FIG. 4 is a schematic structural diagram of a withdrawal and straightening machine in a strip casting and rolling high-strength steel leveling production line provided by the invention;
fig. 5 is a schematic structural diagram of the edge cutting equipment in the strip casting and rolling high-strength steel leveling production line provided by the invention.
The reference numbers illustrate:
10. an uncoiler; 11. an uncoiler;
21. a head straightening machine; 211. a nine-roll straightener; 22. double-layer shearing; 200. uncoiling the operating line;
30. a welding machine;
40. trimming equipment; 41. an edge heating device; 42. trimming circle shears;
50. a leveling system; 51. a leveling machine;
52. a withdrawal and straightening machine; 521. straightening a transverse bending roller set; 522. straightening longitudinal bending roller group; 523. a bending roller set;
61. shearing an outlet; 62. a coiler;
71. a first tension roller; 72. a second tension roller; 73. a third tension roller; 74. a fourth tension roller;
80. 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.
Scheme one
The invention provides a thin strip cast-rolling high-strength steel flattening production line, which comprises an uncoiler 10, a welding machine 30, a first tension roller 71, an edge cutting device 40, a second tension roller 72, a flattening system 50, a third tension roller 73, an outlet shear 61 and a coiler 62 which are sequentially arranged as shown in figures 1-5; the leveling system 50 includes a leveler 51 and a withdrawal and straightening unit 52, and the withdrawal and straightening unit 52 is disposed after the leveler 51.
The steel coil is transported to a winding drum of an uncoiler 10 to be uncoiled, and the head of the strip steel is sent to a welding machine 30 to be welded with the tail of the previous strip steel; after the welding is completed, the strip steel 80 enters the first tension roller 71, is subjected to edge cutting by the edge cutting device 40, enters the second tension roller 72, sequentially enters the leveler 51 and the tension leveler 52 for leveling, and then moves to the outlet shears 61 and the coiler 62 by the third tension roller 73. In the production line, after the tension leveler 52 follows the leveler 51, the leveler 51 and the tension leveler 52 cooperate with each other to improve the plate shape and the plate thickness error, so that the plate shape defects of the cast-rolled ultrathin strip steel and the super cast-rolled ultrathin strip silicon steel can be effectively improved, the problems of high roughness, large thickness error, plate surface ribbing, stress lifting of the annealed steel plate and the like of the cast-rolled ultrathin strip steel and the super cast-rolled ultrathin strip silicon steel can be eliminated, the plate shape flatness defect of the strip can be corrected, and the residual internal stress can be reduced.
In one embodiment, the leveler 51 has a quadruple structure, and the quadruple leveler 51 can level the hot-rolled and annealed steel coil at room temperature to improve the mechanical properties of the strip steel, improve the surface quality and flatness of the strip steel, adjust the surface roughness of the strip steel, and better control the roughness and thickness of the cast-rolled ultra-thin strip silicon steel.
Specifically, as shown in fig. 3, the leveler 51 includes a leveler base plate, a leveler frame and accessories, a work roll assembling unit, a back-up roll assembling unit, a roll bending cylinder and balance cylinder device, a roll axial locking device, a hydraulic press device, a roll line adjusting device, a leveler main transmission unit, a work roll changing device, a back-up roll changing device, an outlet bending prevention roll, a strip steel anti-tangling guide plate, a roll line roll, an inlet wrinkle prevention roll, a leveler 51 dust hood, and a leveler sealing unit.
The leveler floor is positioned at the entrance and exit sides below the leveler frame to support the leveler 51. The bottom plate of the flattening machine consists of a steel plate, a bolt fastener and the like. The frame of the planisher is used for mounting a roller system and other elements and is a main element bearing rolling force. The frame of the leveling machine consists of two memorial archways, a connecting beam, a lining plate, a track and the like. The memorial archways of the frame of the temper mill are made of ZG270-500 materials, and the two memorial archways are combined together through an upper connecting beam and a lower connecting beam to form a whole frame. The lining plate on the frame is subjected to quenching and tempering by 45 steel, and the wear-resistant lining plate is arranged on the inner side of the memorial archway by screws. The memorial archway is made of integral steel castings, and all surfaces of the memorial archway are processed. The memorial archway has good vibration reduction effect, uniform stretchability and no stress concentration.
The working roll assembly unit is a core part of the leveler 51, and the main motor directly drives the working roll through the cross universal coupling, so that the steel strip is leveled. The working roller bearing adopts a four-row tapered roller bearing. The working roll bearing seat is made of forged steel and is provided with an end cover, a distance ring and a sealing element, and belt pulleys are arranged on the upper portion of the upper bearing seat and the bottom portion of the lower bearing seat. The bearing is filled with dry oil, and two ends of the bearing are provided with sealing rings. The backup roll system in the backup roll assembling unit is a core part of the leveler 51, and supports the work rolls and receives the rolling pressure transmitted from the work rolls. The supporting roller is formed by finely grinding alloy steel, and the bearing adopts a cylindrical roller bearing (radial direction) and a tapered roller bearing. The bearing seat of the supporting roll is a steel casting, and the wearing surface is provided with a replaceable tin bronze lining plate. The operating side is fixed to the leveler 51 with a hydraulic lock and the drive side floats. The upper bearing seat is balanced by a hydraulic cylinder arranged on the window hydraulic block. The lower bearing seat is provided with a roller, which is convenient for changing the roller. The bending cylinder and the balance cylinder device are used for positive and negative bending rolls of the working roll. The balancing hydraulic cylinder of the upper supporting roller is used for balancing or supporting the upper supporting roller. The hydraulic block is fixed in the frame window by bolts. And a hydraulic cylinder for balancing the upper supporting roll and a roll bending cylinder for the upper working roll and the lower working roll are arranged in the hydraulic block. The balancing hydraulic cylinder of the upper supporting roller is used for balancing or supporting the upper supporting roller. The bending roll block is arranged in the cylinder block, and the cylinder block is integral. And 4 roller bending blocks on each side are used for positive and negative roller bending of the working roller.
The roll axial locking device is used for axially locking the roll bearing seat. The roller axial locking device is arranged on the housing, and a movable clamping plate driven by a hydraulic cylinder is arranged on the operation side; the axial locking device of the working roll adopts a movable clamping plate shared by an upper working roll and a lower working roll, and the axial locking device of the supporting roll adopts a movable clamping plate independent of an upper supporting roll and a lower supporting roll. The hydraulic press-on device provides rolling force for the temper mill 51 and compensates the regrinding amount of the lower working roll and the lower supporting roll. The hydraulic pressing device is provided with two pressing hydraulic cylinders which are arranged at the bottom of the levelling machine housing, and each hydraulic cylinder is controlled by a servo valve; two hydraulic cylinders are respectively provided with a linear built-in displacement sensor, and the position sensors provide the position feedback of the full stroke of the hydraulic cylinders; the pressure sensor monitors the pressure of the hydraulic cylinder. The hydraulic servo valve adopts a high-precision MOOG servo valve, and the position detection adopts a high-precision built-in displacement sensor. The rolling line adjusting device is installed at the top of the memorial archway window of the temper mill, and the inclined wedge and the step block are in an adjusting type. The height mark of the rolling line is ensured to be constant by adjusting the inclined wedge and the step block, and the position requirements of new and old roll systems are met. The rolling line adjusting device is arranged on the two bearing seats of the supporting roller and is arranged at the top of the memorial archway window. The height of the inclined wedge blocks and the height of the step blocks are adjusted to just compensate the height difference of the rolling line behind the grinding roller, and finally the height is adjusted in a stepless mode. In the main transmission unit of the temper mill, a motor coupling is arranged between a main motor and a universal coupling, a safety pin is arranged to prevent an emergency overload condition, and the coupling is provided with a driving wheel. The main transmission connecting shaft is arranged between the roll neck of the working roll of the planisher 51 and the motor and transmits torque to the planisher 51. The main drive spiale support sets up in the transmission side of levelling machine 51, fixes on the basis. When the roller is replaced, the roller is used for supporting and axially fixing the transmission shaft.
The working roll changing device realizes the quick replacement of the working roll system. The working roll changing device consists of a roll changing trolley and a roller dragging trolley. The main body vehicle comprises a vehicle body, a main body transmission device and the like. The car body is of a welded steel structure; the roll changing process comprises the following steps: the roll changing trolley is driven to be close to the front of the frame of the temper mill, the upper and lower working roll bearing blocks are placed on the working roll changing track after falling down, and the upper and lower working rolls are pulled out together by the roll changing trolley; after the new roller is loaded, the roller dragging trolley pushes the new working roller into the working position, and after the working roller is lifted, the roller changing is finished.
The supporting roller replacing device is used for replacing the upper supporting roller and the lower supporting roller. And (4) drawing out the old supporting roll by using a trolley, hoisting the old supporting roll by using a crown block, replacing the old supporting roll with a new supporting roll, and moving the new supporting roll into the new supporting roll. The lower bearing seat of the supporting roller is provided with four rollers which run on the steel rail. The front end of the bearing block on the operating side is provided with a hook used for connecting a roll changing trolley, the roll changing trolley is provided with two rollers and runs on a steel rail, and the roll changing trolley is moved by a hydraulic cylinder to realize roll changing. And after the frame is moved out, the supporting roller is replaced. The supporting roll changing bracket of the supporting roll is a steel structural member. When the roller is changed, the roller is inserted between the upper and lower supporting roller bearing seats. The roll changing process comprises the following steps: when the old roller is replaced, the roller-replacing hydraulic cylinder firstly pulls out the lower supporting roller, then the crane puts the roller-replacing bracket on the bearing seat of the lower supporting roller, the hydraulic cylinder pushes the lower supporting roller, the upper supporting roller falls down and is placed on the bracket, and then the whole roller is pulled out; the process of changing into a new roll is the reverse.
The outlet bending-proof roll can prevent the vibration of the steel strip which can happen when the steel strip is leveled. The roller can also ensure that the outlet steel belt and the upper working roller keep a certain wrap angle, and effectively prevent diagonal grains caused by unstable tension when the high-speed leveling is carried out. The vibration of the strip steel is prevented during high-speed rolling. The outlet bending-proof roller is arranged at the outlet of the roll gap of the temper mill, is arranged below a rolling line, and is driven by a gear rack to swing on a swing fulcrum on an upright post of the temper mill. The position of the anti-bending roller is automatically set according to the thickness of the plate, the anti-bending roller swings and is put down when the strip is threaded, the guide plate table connected with the anti-bending roller extends out to facilitate the strip threading, and the anti-bending roller swings and is lifted when the strip is in work and works. Can retract when the working roll and the supporting roll are changed. The strip steel anti-winding guide plate is arranged on a rolling line on the outlet side of the temper mill, and prevents the strip steel from winding the working roll when the strip passes through and is broken. When the roll is changed, the flattening machine 51 can be contracted to facilitate roll changing. The anti-winding guide plate is arranged on the stand column of the housing and is provided with a fixed part and a telescopic part, and the hydraulic cylinder pushes the telescopic part to slide on the fixed part and can compensate according to the change of the roller system. The roller is used for keeping the wrap angle of the steel strip on the tension roller. The rolling line roller comprises a free roller and is fixed between two memorial archways at the inlet side and the outlet side. The inlet crease-resist roll prevents possible chatter of the steel strip during the leveling. The roller can also ensure that the inlet steel belt and the upper working roller keep a certain wrap angle, and effectively prevent diagonal grains caused by unstable tension when the roller is leveled at high speed. When the thin strip is flattened, the strip is tightly supported, and the strip is prevented from wrinkling. The inlet crease-resist roller is arranged at the inlet of a roll gap of the temper mill, is arranged below a rolling line, and swings are realized by driving of a gear rack on a stand column of the temper mill through a swing fulcrum. The position of the crease-resistant roller is automatically set according to the thickness of the plate, the crease-resistant roller swings and is put down when the plate is threaded, a plate guide table connected with the crease-resistant roller extends out to facilitate threading, the crease-resistant roller swings and is lifted when the plate is in work, and the crease-resistant roller works. Can retract when the working roll and the supporting roll are changed. The leveler dust hood is used to suck dust generated during the operation of the leveler 51 and to discharge the dust into the atmosphere after filtration. The dust hood of the temper mill consists of an inlet side dust removing part, an outlet side dust removing part and the like. The dust excluding hood is a welding structural part. The planisher sealing unit is positioned from the rack inlet to the rack outlet and seals the unit.
The leveler 51 has a work roll positive and negative roll bending device, and can effectively eliminate edge waves and middle waves and ensure the surface quality of the strip steel. The leveler 51 includes a leveling liquid injection device composed of injection beams, nozzles, connection pipes, etc., and a plurality of nozzles are installed in two groups on the headers, and the two groups of headers inject the leveling liquid on the upper and lower surfaces of the strip steel in an up-down arrangement. The rolling force of the temper mill can reach 12000 kN.
In one embodiment, withdrawal straightening machine 52 includes a set 521 of horizontal bending rolls, a set 522 of vertical bending rolls, and at least two sets 523 of bending rolls. As shown in FIG. 4, the tension leveler 52 is of a two-bending and two-straightening type, which enhances the straightening ability and can eliminate the bow of the strip steel. The upper roll set of the withdrawal and straightening unit 52 has a hydraulic quick opening and closing function. The electric worm gear lead screw lifter can realize the quick adjustment and accurate positioning of the press-in amount of the working roll. In order to conveniently and quickly replace each group of working rolls of the tension leveler 52, a roll replacing trolley is arranged, and a hydraulic cylinder drives the roll replacing trolley during roll replacing.
Further, the bending roller set 523 is a quadruple roller set or a sextuple roller set, and two bending roller systems are provided for the high-strength steel plate thickness, and two different roller diameters can meet the tension-straightening process of the steel strips with different material thicknesses. Wherein the diameter of the small roller is less than or equal to 45 mm.
In an embodiment, the edge-cutting circle shear 42 is a turret structure, the edge-cutting circle shear is arranged behind the edge-cutting circle shear 42, the circle-cutting edge-cutting circle shear is arranged in front of the tension leveler 52, cast-rolling ultrathin strip steel and super-cast-rolling ultrathin strip silicon steel have high loss on the cutting edges and high field failure rate, and the turret structure effectively improves the rapid feeding of the edge-cutting circle shear 42 into the second set of cutting edge devices after the failure. Preferably, the disc shear is provided with a single-sided independent width adjustment.
Further, a fourth tension roller 74 is disposed between the leveler 51 and the withdrawal and straightening unit 52. As shown in fig. 1, in the production line, the tension rollers are respectively arranged in front of the circle shear, in front of and behind the leveler 51 and in front of the exit shear 61, so as to meet the requirements of different tensions used by each device of the unit.
As shown in fig. 1 and 2, the strip casting and rolling high-strength steel flattening production line includes a straight head machine 21 and a double shear 22, the double shear 22 is disposed behind the straight head machine 21, and the straight head machine 21 is a nine-roll straightener 211. In one embodiment, the strip casting and rolling high-strength steel leveling line comprises at least two sets of uncoiling operation lines 200, the uncoiling operation lines 200 comprise an uncoiler 10, a straight head machine 21 and a double-layer shear 22 which are sequentially arranged, and the two sets of uncoiling operation lines 200 are respectively connected with a welding machine 30. The raw material steel coil is transported to a winding drum of an uncoiler 10 by an upper coiling car, and after the head of the strip is straightened by a straight head machine 21, the strip steel 80 is sent to a double-layer shear 22, and the head and unqualified parts of the strip steel are cut off; the cut strip steel is sent to a welding machine 30 to be welded with the tail of the previous strip steel. The straight head machine 21 straightens the tail part of the previous steel coil, the double-layer shears 22 behind the straight head machine 21 cut off the tail part and the out-of-tolerance part of the strip steel, and the strip steel runs to the welding machine 30 at the threading speed after being cut off; meanwhile, the steel coil in the other uncoiling operation line 200 is threaded and the head of the steel coil is cut, and the steel coil waits to be welded with the tail of the coiled steel coil, so that the production efficiency and the economic benefit are improved. Specifically, the welder 30 may employ laser welding.
Further, an uncoiler 11 is arranged behind the uncoiler 10, the uncoiler 11 is beneficial to guiding the strip head into the straight-head machine 21, and the problem that cast-rolled ultrathin strip silicon steel is difficult to guide into the straight-head machine 21 and enter a winding drum is solved.
In one embodiment, the rotary shears, withdrawal and straightening unit 52, tension roller and leveling unit 51 are equipped with a dust purging and collecting system, respectively. The steel coil operation and transportation equipment and the leveler 51 are provided with steel coil preparation stations which are separately arranged off-line, so that the steel coil preparation time is effectively shortened, and the operation efficiency is improved. The tail coil cleaning device is arranged in the area of the uncoiler 10, the design is simple and effective, the influence on the unit operation is small, and the core is cleaned safely and conveniently.
The production line does not improve the pretensioning capacity of the tension roller and increase the production line cost, but improves the performance characteristics of the cast-rolled ultrathin strip steel and the ultra-cast-rolled ultrathin strip silicon steel in comprehensive multi-aspect measures, can effectively improve the plate shape defects of the cast-rolled ultrathin strip steel and the ultra-cast-rolled ultrathin strip silicon steel, and the strip steel sequentially enters the uncoiler 10, the straight head machine 21, the double-layer shear 22, the welding machine 30, the edge heating device 41, the front tension roller of the disc shear, the scrap shear, the front tension roller of the tension leveler, the leveler 51, the rear tension roller of the leveler, the tension leveler 52, the rear tension roller of the tension leveler, the outlet 61 and the coiler 62.
The working process of the production line can comprise the following steps: as shown in fig. 2, a steel coil is lifted to a fixed saddle of an inlet transportation area by a crown block, the steel coil is transported to a number 1 ground roller by a feeding trolley, a binding band is cut off by a full-automatic binder removal machine, the steel coil without the binding band is transported to a number 2 ground roller by the trolley for band head treatment, the steel coil is transported to a waiting cross saddle of an uncoiler 10 for waiting for coiling after being rotated by 90 degrees by the feeding trolley, and the feeding trolley returns to the next saddle; the raw material steel coil on the cross saddle is transported to a winding drum of the uncoiler 10 by an coiling car, a manipulator is arranged in front of the uncoiler 10 in the coiling process, the inner ring of the steel coil is automatically identified and processed, and automatic width measurement and diameter measurement are completed in the coiling process; then, the steel coil trolley begins to descend, returns to a position to be coiled (on a track between the cross saddle and the uncoiler 10) and waits for the next steel coil to be coiled; the steel coil is positioned behind the winding drum of the uncoiler 10, the winding drum of the uncoiler 10 starts to expand, the inner diameter of the steel coil is tightly supported, and meanwhile, the steel coil is tightly pressed by the compression roller; the drum and rolls of the unwinder 10 then start to rotate and the strip head passes through the entry pinch rolls with the help of clamps or magnetic belts and shovel guides. Then, straightening the head of the strip steel by a straight head machine 21, sending the strip steel into a double-layer shear 22 through a strip threading table, and cutting off the head of the strip steel and unqualified parts; the cut strip steel is sent to a welding machine 30 to be welded with the tail of the previous strip steel. After the weld is complete, the unit begins to run at a slower speed until the weld reaches the exit shears 61. The strip steel sequentially enters a first tension roller 71, a deviation correcting roller, a stabilizing roller, an edge heating device 41, an edge cutting disc shear 42, a second tension roller 72, a planisher 51, a fourth tension roller 74, a withdrawal and straightening machine 52 and a third tension roller 73, enters the edge cutting disc shear 42 for edge cutting, and the waste edge is broken through a scrap edge shear and is conveyed to a waste material pit outside a workshop through a belt. Finally, the stitched part (or welded part) is cut by a rear export shear 61 and enters a coiler 62 to be coiled, and finally the coil is conveyed to a coil finished product warehouse through a coil unloading trolley, a factory crane and the like.
In another embodiment, multi-roll straightening is added immediately after the two-bend two-straightening withdrawal straightening machine 52. In another embodiment, the third tension roller 73 before the exit shears 61 may be eliminated.
Scheme two
The invention provides a process for flattening thin strip cast-rolled high-strength steel, which adopts the thin strip cast-rolled high-strength steel flattening production line, wherein the thin strip cast-rolled high-strength steel is sequentially processed by an uncoiler 10, a welding machine 30, a first tension roller 71, trimming equipment 40, a second tension roller 72, a flattening system 50, a third tension roller 73, an outlet shear 61 and a coiler 62. After the thin strip cast-rolled high-strength steel is subjected to edge cutting through the edge cutting equipment 40, the thin strip cast-rolled high-strength steel enters the leveling system 50, the leveling machine 51 and the tension leveler 52 in the leveling system 50 are matched with each other to improve the plate shape and the plate thickness error, so that the plate shape defects of the cast-rolled ultrathin strip steel and the super-cast-rolled ultrathin strip silicon steel can be effectively improved, the problems of high roughness, large thickness error, rib forming on the plate surface, stress lifting of the annealed steel plate and the like of the cast-rolled ultrathin strip steel and the super-cast-rolled ultrathin strip silicon steel can be eliminated, the plate shape flatness defect of the strip is corrected, and the residual internal stress is reduced.
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. A thin strip cast-rolling high-strength steel flattening production line is characterized by comprising an uncoiler, a welding machine, a first tension roller, trimming equipment, a second tension roller, a flattening system, a third tension roller, an outlet shear and a coiling machine which are sequentially arranged; the leveling system comprises a leveling machine and a withdrawal and straightening machine, and the withdrawal and straightening machine is arranged behind the leveling machine; the tension leveler comprises a straightening transverse bending roller set, a straightening longitudinal bending roller set and at least two bending roller sets.
2. The strip cast-rolling high-strength steel flattening production line of claim 1, characterized in that the flattening machine is of a quadruple structure.
3. The strip cast-rolling high-strength steel leveling line according to claim 1, wherein the bending roller group is a quadruple roller group or a sextuple roller group.
4. The strip cast-rolling high-strength steel leveling line according to claim 1, wherein the edge cutting apparatus comprises an edge heating device and an edge cutting circle shear, the edge heating device being disposed in front of the edge cutting circle shear.
5. The strip cast-rolling high-strength steel leveling production line according to claim 4, wherein the trimming rotary shears are of a turret type structure, and trimming shears are arranged behind the trimming rotary shears.
6. The strip cast-rolling high-strength steel flattening production line of claim 1, comprising a straight head machine and a double-layer shear, wherein the double-layer shear is arranged behind the straight head machine, and the straight head machine is a nine-roll straightener.
7. The strip casting high-strength steel flattening production line according to claim 6, characterized by comprising at least two sets of uncoiling lines, wherein the uncoiling lines comprise an uncoiler, a straight head machine and a double-layer shear which are sequentially arranged, and the two sets of uncoiling lines are respectively connected with the welding machine.
8. The strip cast-rolling high-strength steel flattening production line according to claim 6, characterized in that a fourth tension roll is arranged between the flattening machine and the withdrawal and straightening unit.
9. The process for flattening the thin strip cast-rolled high-strength steel is characterized in that the thin strip cast-rolled high-strength steel flattening production line disclosed by any one of claims 1 to 8 is adopted, and the thin strip cast-rolled high-strength steel is sequentially processed by an uncoiler, a welding machine, a first tension roller, a trimming device, a second tension roller, a flattening system, a third tension roller, an outlet shear and a coiling machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210337788.XA CN114535359A (en) | 2022-04-01 | 2022-04-01 | Strip cast-rolling high-strength steel leveling production line and leveling process |
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| CN202210337788.XA CN114535359A (en) | 2022-04-01 | 2022-04-01 | Strip cast-rolling high-strength steel leveling production line and leveling process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115213480A (en) * | 2022-06-18 | 2022-10-21 | 首钢京唐钢铁联合有限责任公司 | Control method for high-strength steel continuous pickling line outlet flying shear front straight machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115213480A (en) * | 2022-06-18 | 2022-10-21 | 首钢京唐钢铁联合有限责任公司 | Control method for high-strength steel continuous pickling line outlet flying shear front straight machine |
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