DE202020102335U1 - Multifunctional corner rolling device for rolling the corners of a continuous casting slab - Google Patents

Abstract

Multifunctional corner rolling device for rolling the corners of a continuous casting slab, characterized in that the corner rolling device is arranged on both sides of the continuous casting slab (12), the working surfaces of a pair of upper chamfering rollers (1) or a pair of lower chamfering rollers (6) in the direction of the four corners the continuous cast slab (12) are rolled; and the four chamfering rollers are each provided with independent drive devices which adjust the position, the rolling force and the pressing time of the four chamfering rollers in such a way that the rolling amount of each corner of the continuous casting roller is controlled separately.

Description

TECHNICAL AREA

The invention relates to the field of metal solidification and continuous casting, in particular to a multifunctional corner rolling device and to a method for rolling the corners of a continuous casting slab.

STATE OF THE ART

With the development of metallurgy technology worldwide, modern continuous casting technology is improved every day and castable steel types are constantly being expanded. In the continuous casting production process of large steel companies, some high-alloy, high-quality, crack-prone steel types are produced. In the recent development of heavy plate production technology in particular, the rolling width of the plates is increasing. As the slab expansion ratio increases, an edge seam defect or bulge defects of the heavy plate become more serious. To meet the quality requirements, steelmakers need to increase the amount of pruning and reduce the yield. This leads to a substantial increase in the production costs of the manufacturers.

In view of this, a major technical measure adopted by metallurgical practitioners, besides optimizing molten steel quality, secondary cooling technology, and acceptable rolling, is the chamfering crystallizer technology. The technology with a narrow surface with chamfered shape is used extensively in the prior art. Although the chamfered shape technology can effectively solve the problem of the edge slippage of a cast slab, many results of production practices show that for a continuous cast slab made using the chamfered shape technology, edge cracking or bulging defects etc. of a plate or a tape in a subsequent rolling process Cast slab can not be completely eliminated in this form, since the angle of a chamfered corner formed by a chamfered surface and by an upper and a lower wide surface of the cast slab is relatively small, generally less than 135 °.

Thus, some domestic and foreign metal practitioners have developed methods of rolling the corners of a cast slab to obtain continuous cast slabs with corners in more acceptable shapes.

For example, the applicant of the present application in the earlier application for Chinese Utility Model No. 201520424030.5 discloses 'an apparatus for rolling the corners of a continuous casting slab' (filing date: July 18, 2015, publication no. CN204747439U ). The device mainly consists of a chamfer roll, a roll support frame, a roll movement lever, a roll movement lever positioning slideway, a hydraulic cylinder, a device base plate and the like, the device being mounted at a position out of a sector segment in the rear of a casting machine, a cast slab is provided on both the left and right sides; the chamfering roller being rolled toward a corner of the slab under the action of the hydraulic cylinder to form a chamfered corner on the casting slab as the casting machine casting process continues.

In use, the device has disadvantages mainly from four points of view as follows: 1) Since a single roll is used for rolling both the left and right sides of the slab, the device is only for rolling cast slabs with the same thickness and different widths suitable and cannot be used for rolling cast slabs with different thicknesses; if the thickness of the slab is changed, the roller must be replaced by another one; 2) Since both the left and right rollers are driven by a single hydraulic cylinder, the pressures of the left and right hydraulic cylinders are the same to maintain balance and the corner pressures on the left and right sides cannot be adjusted separately ; 3) since each of the rollers on the left and right sides uses a single convex edge for rolling, the rolling amounts of an upper corner and a lower corner on the same side of the cast slab cannot be adjusted at the same time; and 4) since the thicknesses of the cast slabs of different steel types differ slightly, a single roller with a convex edge cannot achieve a centering adjustment during production.

PRESENTATION OF THE INVENTION

In view of the above-mentioned shortcomings and disadvantages in the prior art, the present invention proposes a multifunctional rolling device for rolling the corners of a continuous casting slab. The device can adjust the position, the rolling force and the rolling time of four rollers for corner rolling separately, so that it is suitable for rolling the corners of slabs with different widths and thicknesses and leads to optimized chamfering of the corners of the roller in order to do the job Eliminate edge cracks or the bulge of the cast slab.

To achieve the above object, the present invention provides a technical solution as follows.

A multifunctional corner rolling device for rolling the corners of a continuous casting slab is created, the corner rolling device being on both sides of the continuous casting slab 12th is arranged, the working surfaces of a pair of upper chamfering rollers 1 or a pair of lower chamfering rollers 6 towards the four corners of the continuous casting slab 12th be rolled; and the four chamfering rollers are each provided with independent drive devices which can adjust the position, the rolling force and the pressing time of the four chamfering rollers, respectively, in such a way that the rolling amount of each corner of the continuous casting roller is controlled separately.

• das Paar der Walzengesamtstützrahmen 5 auf zwei Seiten der Bramme 12 symmetrisch angeordnet ist, die oberen Enden der Walzengesamtstützrahmen 5 schräge Arme 13 sind und die unteren Enden davon horizontale Arme sind, die oberen Anfasungswalzen 1 und die unteren Anfasungswalzen 6 an den schrägen Armen 13 bzw. an den horizontalen Armen einstellbar montiert sind,
• das Paar der Walzengesamtstützrahmen 5 jeweils an dem Paar der Befestigungsgrundplatten 11 gleitfähig montiert ist und die Antriebsvorrichtungen auf den Außenseiten der Walzengesamtstützrahmen 5 angeordnet sind, wobei die Antriebsvorrichtungen die Walzengesamtstützrahmen 5 antreiben, um sie an den Befestigungsgrundplatten 11 zu bewegen;
• die Bewegungsbetätigungshebel 3 der oberen Anfasungswalzen durch die schrägen Arme 13 gehen und die Rahmen 2 der oberen Anfasungswalzen mit den unteren Enden der Bewegungsbetätigungshebel 3 der oberen Anfasungswalzen verbunden sind und die oberen Enden der Bewegungsbetätigungshebel 3 der oberen Anfasungswalzen mit den Antriebsvorrichtungen verbunden sind;
• die horizontalen Arme mit den unteren Anfasungswalzen 6 durch die Rahmen 7 der unteren Anfasungswalzen eingebaut sind und die Stützsitze 8 der unteren Anfasungswalzen unter den Rahmen 7 der unteren Anfasungswalzen sind;
• ein eingeschlossener Winkel zwischen der radialen Mittellinie jeder der oberen Anfasungswalzen 1 und der unteren Anfasungswalzen 6 und einer Winkelhalbierenden der Ecke der Stranggusswalze a ist, was -25 bis +25 Grad ist.

The corner rolling device includes the upper chamfering rolls 1 , Frame 2nd the upper chamfering rollers, movement actuating lever 3rd the upper chamfering rollers, the driving devices, the overall roller support frame 5 , lower chamfering rollers 6 , Frame 7 of the lower chamfering rollers, support seats 8th the lower chamfering rollers and mounting base plates 11 , in which:

• the pair of roller overall support frames 5 on two sides of the slab 12th is arranged symmetrically, the upper ends of the overall roller support frame 5 sloping arms 13 and the lower ends thereof are horizontal arms, the upper chamfering rollers 1 and the lower chamfering rollers 6 on the sloping arms 13 or are adjustably mounted on the horizontal arms,
• the pair of roller overall support frames 5 each on the pair of mounting base plates 11 is slidably mounted and the drive devices on the outer sides of the overall roller support frame 5 are arranged, wherein the drive devices, the overall roll support frame 5 drive them to the mounting base plates 11 to move;
• the motion control levers 3rd the upper chamfering rollers through the oblique arms 13 go and the frame 2nd the upper chamfering rollers with the lower ends of the motion control levers 3rd the upper chamfering rollers and the upper ends of the movement operating levers 3rd the upper chamfering rollers are connected to the drive devices;
• the horizontal arms with the lower chamfering rollers 6 through the frames 7 the lower chamfering rollers are installed and the support seats 8th the lower chamfering rollers under the frame 7 the lower chamfering rollers are;
• an included angle between the radial centerline of each of the top chamfer rolls 1 and the lower chamfering rollers 6 and a bisector of the corner of the continuous casting roll a is what is -25 to +25 degrees.

The upper chamfering rollers 1 and the lower chamfering rollers 6 are towards the front of the continuous cast slab 12th rolled if a is zero.

The motion control levers 3rd the top chamfering rollers are perpendicular to the sloping arms 13 .

The drive devices are hydraulic cylinders, motors or reduction gears with rotating screws.

The upper chamfering rollers 1 and the lower chamfering rollers 6 are cylindrical rollers with the same diameter, truncated cone rollers or rollers with a variable diameter.

The upper chamfering rollers 1 and the lower chamfering rollers 6 are integrated rollers or the rollers are separated from the shafts.

The working surface widths of the upper chamfering rollers 1 and the lower chamfering rollers 6 are 80-500 mm and the roll diameters of which are 100-480 mm, the working surface widths and the roll diameters of the upper chamfering rolls 1 the same as those of the lower chamfer rolls 6 or others are.

The multifunctional corner rolling device is used for rolling cast slabs with right-angled corners and those with chamfered corners, rounded corners or corners in other complex shapes.

• Schritt 1: Zuführen von Öl zu den vier Hydraulikzylindern gemäß dem Antrieb mit niedrigen Drücken von 0,5 - 2 MPa, so dass die vier oberen und unteren Anfasungswalzen in Richtung der Ecken der Stranggussbramme gewalzt werden, und 1 - 2 Minuten nach einem Druckausgleich Aufrechterhalten der Drücke;
• Schritt 2: Verringern der Ölzuführdrücke der vier Hydraulikzylinder auf 0 - 0,4 MPa und 1 - 2 Minuten Aufrechterhalten der Drücke, um das Ungleichgewicht der Eckenandruckpositionen der Walzen zu beseitigen;
• Schritt 3: gleichzeitiges allmähliches Erhöhen der Drücke der vier Hydraulikzylinder auf normale Arbeitsdrücke von 40 - 160 MPa; und
• Schritt 4: einzelnes Einstellen des Arbeitsdrucks eines Hydraulikzylinders in Übereinstimmung mit der Anforderung an den Andruckbetrag jeder Ecke der Stranggussbramme.

In a method for using the multifunctional corner rolling device for rolling the corners of a continuous casting slab, the method comprises the following steps if the drive devices are hydraulic cylinders:

• Step 1: Supply oil to the four hydraulic cylinders according to the drive at low pressures of 0.5-2 MPa so that the four upper and lower chamfering rollers are rolled towards the corners of the continuous cast slab and maintained for 1-2 minutes after pressure equalization the pressures;
• Step 2: Reduce the oil supply pressures of the four hydraulic cylinders to 0-0.4 MPa and maintain them for 1-2 minutes to remove the imbalance in the corner pressure positions of the rollers;
• Step 3: simultaneously increasing the pressures of the four hydraulic cylinders to normal working pressures of 40-160 MPa; and
• Step 4: individually adjusting the working pressure of a hydraulic cylinder in accordance with the pressing amount requirement of each corner of the continuous cast slab.

• Schritt 1: Antreiben der zwei Walzengesamtstützrahmen unter niedrigen Drücken von 0,5 - 2 MPa, um die Hydraulikzylinder 9 in der Weise anzutreiben, dass die unteren Anfasungswalzen 6 in Richtung der Ecken der Stranggussbramme gewalzt werden, und 1 - 2 Minuten nach einem Druckausgleich Aufrechterhalten der Drücke;
• Schritt 2: unter niedrigeren Drücken von 0,5 - 2 MPa Antreiben zweier oberer Anfasungswalzen-Antriebshydraulikzylinder 4 in der Weise, dass die oberen Anfasungswalzen 1 in Richtung der Ecken der Stranggussbramme gewalzt werden, und 1 - 2 Minuten nach einem Druckausgleich Aufrechterhalten der Drücke;
• Schritt 3: Verringern der Ölzuführdrücke der vier Hydraulikzylinder auf 0 - 0,4 MPa und 1 - 2 Minuten Aufrechterhalten der Drücke, um ein Ungleichgewicht der Eckenandruckpositionen der Walzen zu beseitigen;
• Schritt 4: gleichzeitiges allmähliches Erhöhen der Drücke der vier Hydraulikzylinder auf normale Arbeitsdrücke von 40 - 160 MPa; und
• Schritt 5: einzelnes Einstellen des Arbeitsdrucks eines Hydraulikzylinders in Übereinstimmung mit der Anforderung an den Andruckbetrag jeder Ecke der Stranggussbramme.

If the drive devices are hydraulic cylinders, the method comprises the following steps:

• Step 1: Drive the two roller total support frames under low pressures of 0.5-2 MPa to the hydraulic cylinders 9 in such a way that the lower chamfering rollers 6 rolled towards the corners of the continuous casting slab and maintaining the pressures for 1-2 minutes after pressure equalization;
• Step 2: driving two upper chamfering roller drive hydraulic cylinders at lower pressures of 0.5 - 2 MPa 4th in such a way that the upper chamfering rollers 1 rolled towards the corners of the continuous casting slab and maintaining the pressures for 1-2 minutes after pressure equalization;
• Step 3: Reduce the oil supply pressures of the four hydraulic cylinders to 0-0.4 MPa and maintain them for 1-2 minutes to remove imbalance in the corner pressure positions of the rollers;
• Step 4: simultaneously increasing the pressures of the four hydraulic cylinders to normal working pressures of 40-160 MPa; and
• Step 5: individually setting the working pressure of a hydraulic cylinder in accordance with the pressing amount requirement of each corner of the continuous casting slab.

• Die vier Hydraulikzylinder werden zum einzelnen Steuern der vier Walzen verwendet, so dass sie für die Herstellung von Gussbrammen unterschiedlicher Breiten und ebenfalls von Brammen unterschiedlicher Dicken ohne irgendeine Ausrüstungseinstellung und irgendeinen Ausrüstungsersatz geeignet ist, und der Walzbetrag jeder Ecke der Bramme kann in Übereinstimmung mit der Walzanforderung beliebig eingestellt werden; und das technische Problem der Zentrierungsschwierigkeit der Ausrüstung während der Herstellung ist beseitigt. Sie weist eine Reihe von Vorteilen einschließlich hoher Arbeitseffizienz und leichter automatischer Steuerung auf. Darüber hinaus ist die Anfasungsform der Ecken der Gussbramme optimiert, da die Vorderseite der Ecken der Gussbramme gewalzt werden kann, und wird die Aufgabe der effektiven Beseitigung eines Kantennahtdefekts oder der Aufwölbung von Platten gelöst.

Compared to the prior art, the present invention has the following advantageous effects:

• The four hydraulic cylinders are used to individually control the four rolls so that they are suitable for producing cast slabs of different widths and also slabs of different thicknesses without any equipment adjustment and replacement, and the rolling amount of each corner of the slab can be in accordance with the rolling requirement can be set arbitrarily; and the technical problem of centering the equipment during manufacture is eliminated. It has a number of advantages including high work efficiency and easy automatic control. In addition, the chamfer shape of the corners of the cast slab is optimized since the front of the corners of the cast slab can be rolled, and the task of effectively eliminating an edge seam defect or bulging plates is solved.

Figure list

• 1 Fig. 4 is a schematic illustration of a multi-functional rolling device for rolling the corners of a continuous casting slab in the present invention;
• 2nd is a schematic representation of an angle between a radial centerline of an upper chamfer roller 1 and a bisector of the top corner of the continuous casting slab in the present invention; and
• 3a to 3c are schematic representations of the upper chamfering roller 1 and a lower chamfer roller 6 in different forms.

Reference list

1.

upper chamfering roller

2nd

Upper chamfer roller frame

3rd

Upper chamfer roller motion control lever

4th

Drive hydraulic cylinder of the upper chamfering roller

5.

Total roller support frame

6.

lower chamfering roller

7.

Lower chamfer roller frame

8th.

Support seat of the lower chamfer roller

9.

Roller support frame drive hydraulic cylinder

10th

Hydraulic cylinder support seat

11.

Mounting base plate

12th

Continuous cast slab

13.

oblique arm

14.

Center line of the oblique arm

15.

Central axis of the movement control lever of the upper chamfering roller

16.

Bisector of the upper corner

17th

radial center line of the upper / lower chamfering roller (perpendicular to the rotating shaft of the chamfering roller)

a.

included angle between the radial center line of the chamfering roller for the cast slab and the bisector of the corner of the cast slab.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The present invention will be further described in connection with the accompanying drawings and with the embodiments.

As in 1 a multifunctional corner rolling device for rolling the corners of a continuous casting slab comprises upper chamfering rolls 1 , Frame 2nd the upper chamfering rollers, movement actuating lever 3rd the upper chamfering rollers, drive hydraulic cylinders 4th of the upper chamfering rollers, overall roller support frame 5 , lower chamfering rollers 6 , Frame 7 of the lower chamfering rollers, support seats 8th the lower chamfering rollers, roller total support frame drive hydraulic cylinder 9 and mounting base plates 11 .

To roll the corners of the continuous casting slab is the top of each roll support frame 5 in a shape with an oblique arm 13 laid out and are the oblique arms 13 of the pair of total roller support frames 5 inclined inward to create a space for receiving the cast slab 12th to build.

The pair of roller total support frames 5 is on the pair of mounting base plates 11 slidably mounted and the roller total support frame drive hydraulic cylinders 9 are on the outsides of the overall roll support frames 5 arranged, the roller total support frame drive hydraulic cylinders 9 the overall roll support frames 5 drive them to the mounting base plates 11 to move.

The upper chamfering rollers 1 are in the frame 2nd the upper chamfering rollers arranged; The frames 2nd the upper chamfering rollers are with the lower ends of the motion control levers 3rd connected to the upper chamfering rollers, the movement actuating levers 3rd the upper chamfering rollers go through the oblique arms 13 and are perpendicular to the oblique arms; the top ends of the motion control levers 3rd the top chamfering rollers are with the hydraulic cylinders 4th connected; and the working surfaces of the upper chamfering rollers 1 are facing the continuous casting slab.

The lower chamfering rollers 6 are in the frame 7 the lower chamfering rollers arranged; The frames 7 the lower chamfering rollers are through the support seats 8th the lower chamfering rollers on the overall roller support frames 5 arranged; and the working surfaces of the lower chamfering rollers 6 are facing the continuous casting slab.

As in 2nd is shown, this causes a change in the angle of the bisector of the corners of the continuous cast slab in view of the change in the shape of the corners of the continuous cast slab, which may have chamfered corners or rectangular corners, so that between a radial center line 17th every upper chamfering roller 1 and a bisector 16 the top corner of the continuous casting slab or between a radial center line of each lower chamfering roller 6 and an angle bisector of the lower corner of the continuous casting slab an included angle a is formed, where a is ± 25 degrees and the radial centerline 17th is perpendicular to a rotary shaft of the chamfering roller.

If a is zero, the top chamfering rollers 1 and the lower chamfering rollers 6 towards the front of the continuous cast slab 12th rolled.

The upper chamfering rollers are used to achieve a good deformation effect at the corners of the continuous casting slab 1 and the lower chamfering rollers 6 preferably as in 3a is shown in the form of cylindrical rollers of the same diameter, or as in 3c is shown rollers that are concave in the middle; in order to meet other, different requirements, the rollers can also, as in 3b is shown, truncated cone rolls with uniform changes in diameter; or other variable diameter rollers with various complex shapes.

With regard to the structural shape of the rollers, the upper chamfering rollers can 1 or the lower chamfering rollers 6 be integrated rollers; or the rollers may be separate from the shafts, the rollers being slidably connected to the shafts by bushings, bearings or in various other ways.

With regard to the horizontal drive of the entire roller support frame 5 can move forward and backward of the lower chamfering rollers 6 , as in 1 is shown by the roller total support frame drive hydraulic cylinders 9 are driven; or driven by motors or reduction gears with rotating screws, etc.

The working surface widths of the upper chamfering rollers 1 and the lower chamfering rollers 6 are 80 - 500 mm and the roll diameters thereof are 100 - 480 mm. This is suitable for rolling cast slabs with a cross-sectional thickness of 90 - 450 mm and can be used for rolling cast slabs with right-angled corners and those with chamfered corners, rounded corners or corners in other complex shapes.

The drive hydraulic cylinders drive when in use 4th the upper chamfering rollers the upper chamfering rollers 1 so that they point towards the upper chamfered corners of the continuous casting slab 12th be rolled. The roller total support frame drive hydraulic cylinders 9 drive the overall roller support frames 5 so that they stick to the fixed base plates 11 move, and cause the lower chamfering rollers 6 towards the lower chamfered corners of the continuous casting slab 12th be rolled.

By the rolling amount of each corner of the continuous cast slab 12th can control the four hydraulic cylinders including the two drive hydraulic cylinders 4th the upper chamfering rollers and the two roller total support frame drive hydraulic cylinders 9 separately subjected to oil supply pressure and oil supply timing.

Thus, since the condition that the four hydraulic cylinders of the oil supply pressure and oil supply timing can be separately exposed is met, different automatic programming can be adopted in the use method to achieve effects of force balance and a more acceptable corner pressure amount.

Procedure 1: Synchronous adjustment of the four upper and lower chamfering rollers

First step, supply oil to the four hydraulic cylinders according to the drive at low pressures of 0.5-2 MPa so that the four upper and lower chamfering rollers are rolled towards the corners of the continuous casting slab and maintained for 1-2 minutes after pressure equalization the pressures; second step, reducing the oil supply pressures of the four hydraulic cylinders to 0-0.4 MPa and maintaining them for 1-2 minutes to eliminate imbalances in the corner pressure positions of the rollers; third step, simultaneously increasing the pressures of the four hydraulic cylinders to normal working pressures z. B. from 40-160 MPa; and fourth step, individually adjusting the working pressure of a hydraulic cylinder in accordance with the requirement for the pressing amount of each corner of the continuous casting slab.

Method 2: Separate adjustment of the four upper and lower chamfering rollers

First step, driving the two total roll support frames under low pressures of 0.5-2 MPa around the two hydraulic cylinders 9 in such a way that the lower chamfering rollers 6 rolled towards the corners of the continuous casting slab and maintaining the pressures for 1-2 minutes after pressure equalization; second step, at lower pressures of 0.5 - 2 MPa, driving two upper chamfering roller drive hydraulic cylinders 4th in such a way that the upper chamfering rollers 1 rolled towards the corners of the continuous casting slab and maintaining the pressures for 1-2 minutes after pressure equalization; third step, reducing the oil supply pressures of the four hydraulic cylinders to 0-0.4 MPa and maintaining them for 1-2 minutes to eliminate imbalance in the corner pressure positions of the rollers; fourth step, simultaneously increasing the pressures of the four hydraulic cylinders to normal working pressures z. B. from 40-160 MPa; and the fifth step, individually adjusting the working pressure of a hydraulic cylinder in accordance with the pressing amount requirement of each corner of the continuous cast slab.

Using the above-mentioned operations can ensure the pressure consistency of each corner of the continuous cast slab, and different settings of the pressure amounts of different corners can be achieved in accordance with the requirements.

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• CN 204747439 U [0005]

Claims (9)

Multifunctional corner rolling device for rolling the corners of a continuous casting slab, characterized in that the corner rolling device is arranged on both sides of the continuous casting slab (12), the working surfaces of a pair of upper chamfering rollers (1) or a pair of lower chamfering rollers (6) in the direction of the four corners the continuous cast slab (12) are rolled; and the four chamfering rollers are each provided with independent drive devices which adjust the position, the rolling force and the pressing time of the four chamfering rollers in such a way that the rolling amount of each corner of the continuous casting roller is controlled separately. Multifunctional corner rolling device for rolling the corners of a continuous casting slab Claim 1 , characterized in that the corner rolling device comprises the upper chamfering rollers (1), frame (2) of the upper chamfering roller, movement actuating lever (3) of the upper chamfering roller, the drive devices, overall roller support frame (5), lower chamfering roller (6), frame (7) of the lower Chamfering rollers, support seats (8) of the lower chamfering rollers and fastening base plates (11), wherein: the pair of overall roller support frames (5) is arranged symmetrically on two sides of the slab (12), the upper ends of the overall roller support frames (5) inclined arms (13) and the lower ends thereof are horizontal arms, the upper chamfering rollers (1) and the lower chamfering rollers (6) are adjustably mounted on the oblique arms (13) and on the horizontal arms, respectively; the pair of the overall roller support frames (5) are slidably mounted on the pair of the mounting base plates (11), respectively, and the drive devices are arranged on the outer sides of the overall roller support frames (5), the drive devices driving the overall roller support frames (5) to be attached to the attachment base plates (11 ) to move; the motion control levers (3) of the upper chamfering rollers pass through the inclined arms (13) and the frames (2) of the upper chamfering rollers are connected to the lower ends of the motion control levers (3) of the upper chamfering rollers and the upper ends of the motion control levers (3) of the upper Chamfering rollers are connected to the drive devices; the horizontal arms with the lower chamfering rollers (6) are installed through the frames (7) of the lower chamfering rollers and the support seats (8) of the lower chamfering rollers are under the frames (7) of the lower chamfering rollers; an included angle between the radial center line of each of the upper chamfering rollers (1) and the lower chamfering rollers (6) and an bisector of the corner of the continuous casting roller is a, which is -25 to +25 degrees. Multifunctional corner rolling device for rolling the corners of a continuous casting slab Claim 2 , characterized in that the upper chamfering rollers (1) and the lower chamfering rollers (6) are rolled towards the front of the continuous casting slab (12) when a is zero. Multifunctional corner rolling device for rolling the corners of a continuous casting slab Claim 2 , characterized in that the movement actuating levers (3) of the upper chamfering rollers are perpendicular to the inclined arms (13). Multifunctional corner rolling device for rolling the corners of a continuous casting slab Claim 1 or 2nd , characterized in that the drive devices are hydraulic cylinders, motors or reduction gears with rotating screws. Multifunctional corner rolling device for rolling the corners of a continuous casting slab Claim 1 or 2nd , characterized in that the upper chamfering rollers (1) and the lower chamfering rollers (6) are cylindrical rollers of the same diameter, truncated cone rollers or rollers of variable diameter. Multifunctional corner rolling device for rolling the corners of a continuous casting slab Claim 6 , characterized in that the upper chamfering rollers (1) and the lower chamfering rollers (6) are integrated rollers or the rollers are separated from the shafts. Multifunctional corner rolling device for rolling the corners of a continuous casting slab Claim 6 , characterized in that the working surface widths of the upper chamfering rollers (1) and the lower chamfering rollers (6) are 80-500 mm and the roller diameters thereof are 100-480 mm, the working surface widths and the roller diameters of the upper chamfering rollers (1) being the same as those the lower chamfering rollers (6) or others. Multifunctional corner rolling device for rolling the corners of a continuous casting slab Claim 1 or 2nd , characterized in that the multifunctional corner rolling device is used for rolling cast slabs with right-angled corners, chamfered corners, rounded corners or corners in other complex shapes.

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