CN106077550A - A kind of two roller continuous casting billets tilt with roll roll angle apparatus - Google Patents

Abstract

The invention relates to the fields of metal solidification and continuous casting, in particular to a two-roll continuous casting slab corner rolling device with inclined rolls. The device comprises a chamfering roll (1), a roll support frame (3), a connector (4) and a drive push rod (5); the roll support frame (3) is connected with a drive push rod (5) that can move forward and backward , the two cantilever ends of the roll supporting frame (3) are respectively provided with a chamfering roll (1); the two chamfering rolls (1) are arranged oppositely, and the roll surface of the chamfering roll (1) is in the same shape as the wide surface of the slab Angle of inclination: the device is installed on the left and right sides of the continuous casting billet (6), and continuously rolls the corners of the continuous casting billet (6). The invention can realize the forward rolling of the corner of the continuous casting slab, so it has the advantages of small rolling resistance, simple equipment maintenance and the like.

Description

A two-roll continuous casting slab corner rolling device with inclined rolls

technical field

The invention relates to the fields of metal solidification and continuous casting, in particular to a two-roll continuous casting slab corner rolling device with inclined rolls.

Background technique

In the production technology of plate and strip in the modern world, the defects of straight edge cracking or warping are common. Defects are also further away from the edges of the sheet and further towards the center. Iron and steel enterprises have to adopt the method of increasing the amount of trimming and reducing the yield to remove the above-mentioned defects and meet the quality requirements. This results in a substantial increase in production costs for the enterprise.

For this reason, in addition to optimizing the quality of molten steel, secondary cooling technology, and reasonable rolling, metallurgists have adopted a major technical measure to adopt crystallizer technology with chamfering. In the prior art, it is relatively common to use crystallizer technology with chamfered sides. Although the use of chamfered crystallizer technology can effectively solve the problem of transverse cracks at the corner of the slab, the results of mass production practice show that the continuous casting slab produced by the chamfered mold technology with the above parameters has The chamfer angle formed by the surface and the upper and lower wide surfaces of the slab is small, generally less than 135°, and the slab of this shape cannot completely eliminate defects such as straight cracks or warped edges of the plate and strip during the subsequent rolling process .

Therefore, some metallurgists at home and abroad have developed a method of rolling the corners of the slab to obtain a continuous casting slab with a more reasonable corner shape.

For example, Chinese patent CN204747439U discloses "A device for rolling the corners of continuous casting slabs". Driven by the power, the chamfering roll with the convex edge rolls to the slab, and uses the convex edge of the roll to roll the corner of the slab to realize the chamfering of the corner of the slab. The corner shape is further optimized in order to meet the needs of eliminating defects such as straight cracks or warped edges during the widening and rolling process of medium and heavy plates. However, in actual production and application, the chamfered roll with the convex edge is rolled to the corner of the billet by extrusion from the side, rather than rolling the corner of the billet in the forward direction. This inevitably brings two problems: one is that the rolling pressure is high, and the other is that the life of the roll is reduced due to friction.

Contents of the invention

In view of the defects and deficiencies in the above-mentioned prior art, the object of the present invention is to provide a two-roll continuous casting slab corner rolling device with inclined rolls.

In order to achieve the above object, the present invention provides the following technical solutions:

The present invention provides a two-roll continuous casting slab corner rolling device with inclined rolls, the device includes a chamfering roll 1, a roll support frame 3, a connecting piece 4 and a driving push rod 5;

The roll supporting frame 3 is connected with a drive push rod 5 that can move forward and backward, and two cantilever ends of the roll supporting frame 3 are respectively provided with a chamfering roll 1;

Two chamfering rollers 1 are arranged opposite to each other, and the roll surface of the chamfering roller 1 forms an inclination angle with the wide surface of the casting slab; the device is installed on the left and right sides of the continuous casting slab 6 and continuously rolls the corners of the continuous casting slab 6 .

The two chamfering rolls 1 on the two cantilever ends of the roll support frame 3 are arranged symmetrically or asymmetrically.

The two cantilever ends of the roll supporting frame 3 are in a "U" or "Y" structure, and the middle part of the frame is driven by a driving push rod 5 through a connecting piece 4 .

The roll shaft 2 of the chamfering roll 1 is set at an angle α with the wide surface of the continuous casting slab 6, and the α angle is 0° to 45°; The arc tangent of the contact point between the curved roll surface of the roll 1 and the wide surface of the continuous casting slab 6 is set at an angle β to the wide surface of the continuous casting slab 6, and the β angle is 1°-45°.

The chamfering roll 1 and the roll shaft 2 are in a separate structure, or in an integrated structure.

The roll surface of the chamfering roll 1 is a uniform cylindrical shape, or an uneven truncated cone shape, or an arc-shaped truncated cone, or a grooved shape.

The diameter of the chamfering roll 1 is 100-350 mm, and the length of the roll surface of the chamfering roll 1 is 100-350 mm.

The driving force that promotes the movement of the push rod 5 is hydraulic pressure, electric power or mechanical force.

The device is arranged at the exit of the continuous casting machine, or inside the segment of the continuous casting machine.

The device is used for corner rolling of square billets, rectangular billets or slabs, and the thickness of continuous casting billets is applicable to 90mm-500mm.

The device is not only suitable for rolling of chamfered continuous casting slabs, but also suitable for rolling of right angle and arc angle continuous casting slabs.

Compared with prior art, the beneficial effect of the present invention is:

The device of the present invention is installed on the left and right sides of the continuous casting slab. With the progress of the casting process of the continuous casting machine, the driving push rod 5 of the two-roll continuous casting slab angle rolling device with inclined rolls moves towards the continuous casting slab under the drive of power. , and rolling the corners of the continuous casting slab 6 . Then, along with the movement of the slab, the chamfering roller 1 continuously rolls the corners of the continuous casting slab 6, and the rolling amount of the chamfering roller 1 to the corners of the continuous casting slab 6 is mainly driven by the driving push rod 5 Determined by the force, the greater the driving force, the greater the chamfering of the corner of the continuous casting slab. Simultaneously, since the axis of the chamfering roll 1 is tilted, in conjunction with the tilting of the roll surface of the chamfering roll 1, a better angle for forward rolling the corners of the continuous casting slab can be obtained, and at a lower rolling force Under the conditions, the required corner shape of the slab can be obtained. At the same time, because the friction between the roll and the continuous casting slab is reduced, the life of the roll can be greatly improved.

The invention can realize the forward rolling of the corner of the continuous casting slab, so it has the advantages of small rolling resistance, simple equipment maintenance and the like.

Description of drawings

Fig. 1 is the structural representation of the two-roll continuous casting slab corner rolling device with inclined rolls of the present invention;

Fig. 2 is the structural representation that chamfering roll 1 and roll shaft 2 are one;

Fig. 3 is that the roll surface shape of chamfering roll 1 is a uniform truncated cone shape;

Fig. 4 is that the roll surface shape of chamfering roll 1 is an arc-shaped truncated cone;

Fig. 5 shows that the roll surface shape of the chamfering roll 1 is a grooved shape.

The reference signs therein are:

1 chamfering roll

2 rollers

3 Roll support frame

4 connectors

5 drive push rod

6 continuous casting slab

7 The chamfering roll 1 and the roll shaft 2 are an integral structure

8 The chamfering roll 1 roll surface is a uniform frustum shape

9 The chamfering roll 1 roll surface is a curved cone

10 chamfering roll 1 roll surface is the shape with grooves

α The angle formed by the roll axis 2 of the chamfering roll 1 and the wide surface of the continuous casting slab 6

β The angle formed by the roll surface of chamfering roll 1 and the wide surface of continuous casting slab 6 or the arc tangent of the contact point between the curved roll surface of chamfering roll 1 and the wide surface of continuous casting slab 6 and the angle formed by the wide surface of continuous casting slab 6 into the corner

detailed description

The present invention is further described below in conjunction with embodiment.

A two-roll continuous casting slab cornering device with inclined rolls of the present invention comprises a chamfering roll 1 , a roll shaft 2 , a roll support frame 3 , a connecting piece 4 and a driving push rod 5 . The roll supporting frame 3 is connected with the drive push rod 5 that can move forward and backward, and a chamfering roll 1 is respectively arranged on the two cantilever ends of the roll supporting frame 3; the two chamfering rolls 1 are arranged symmetrically, and the The roll surface forms an inclination angle with the wide surface of the slab;

The device is installed on the left and right sides of the continuous casting slab 6 and continuously rolls the corners of the continuous casting slab 6 .

The two chamfering rolls 1 on the two cantilever ends of the roll support frame 3 can be arranged symmetrically or asymmetrically.

The two cantilever ends of the roll support frame 3 are in a "U" or "Y" structure, and the middle part of the frame is driven by a driving push rod 5 through a connecting piece 4.

The roll shaft 2 of the chamfering roll 1 is set at an angle α with the wide surface of the continuous casting slab 6, and the α angle is 0° to 45°; The arc tangent of the contact point between the arc-shaped roller surface and the wide surface of the continuous casting slab 6 is set at an angle β to the wide surface of the continuous casting slab 6, and the β angle is 1°-45°.

The device is installed on the left and right sides of the continuous casting slab. As the casting process of the continuous casting machine proceeds, the two-roller continuous casting slab corner rolling device with inclined rolls is driven by power to press the continuous casting slab 6, and the continuous casting slab The corners of 6 are rolled into the desired shape, as shown in Figure 1, and then driven by the movement of the continuous casting slab 6, the chamfering roller 1 rotates and continuously rolls the corners of the continuous casting slab 6.

The chamfering roll 1 and the roll shaft 2 can be separated, as shown in Fig. 1, or can be integrated 7, as shown in Fig. 2.

The roll surface of the chamfering roll 1 can be a uniform cylindrical shape, an uneven truncated cone shape 8, an arc-shaped truncated cone 9, or a grooved shape 10, as shown in Fig. 3, Or other shapes not limited to the above.

The diameter of the chamfering roll 1 is 100-350 mm, and the length of the roll surface of the chamfering roll 1 is 100-350 mm

The driving force that drives the push rod 5 to move can be hydraulic, electric, or other mechanical forces.

The device can be placed at the exit of the continuous casting machine or inside the continuous casting machine segment.

The device can be used for corner rolling of square billets, rectangular billets and slabs, and the applicable thickness of continuous casting billets is 90mm-500mm.

The device is not only suitable for rolling of chamfered continuous casting slabs, but also suitable for rolling of right angle and arc angle continuous casting slabs.

Claims (11)

1. A two-roll continuous casting slab cornering device with inclined rolls, characterized in that: the device comprises chamfering rolls (1), roll support frame (3), connector (4) and drive push rod (5) ; The roll support frame (3) is connected with a drive push rod (5) that can move forward and backward, and two cantilever ends of the roll support frame (3) are respectively provided with a chamfered roll (1); Two chamfering rolls (1) are arranged opposite to each other, and the roll surface of the chamfering rolls (1) forms an inclination angle with the wide surface of the casting slab; the device is installed on the left and right sides of the continuous casting slab (6), and continuously ) corners are rolled. 2. The two-roll continuous casting slab cornering device with an inclined axis according to claim 1, characterized in that: the two chamfering rolls (1) on the two cantilever ends of the roll support frame (3) are symmetrical set, or asymmetrically set. 3. The two-roll continuous casting slab corner rolling device with inclined rolls according to claim 1, characterized in that: the two cantilever ends of the roll support frame (3) are in a "U" shape or a "Y" structure, The middle part of the frame is driven by a driving push rod (5) through a connecting piece (4). 4. The two-roll continuous casting slab corner rolling device with inclined rolls according to claim 1, characterized in that: the roll shaft (2) of the chamfering roll (1) and the wide surface of the continuous casting slab (6) Set at an α angle, and the α angle is 0°～45°; the roll surface of the chamfering roll (1) and the wide surface of the continuous casting slab (6) or the arc-shaped roll surface of the chamfering roll (1) and the continuous casting slab ( 6) The arc tangent of the wide surface contact point is set at an angle β to the wide surface of the continuous casting slab (6), and the β angle is 1°-45°. 5 . The two-roll continuous casting slab cornering device with inclined rolls according to claim 1 , characterized in that: the chamfering roll ( 1 ) and the roll shaft ( 2 ) are a separate structure, or an integral structure. 6. The two-roll continuous casting slab cornering device with inclined rolls according to claim 1, characterized in that: the roll surface of the chamfering roll (1) is a uniform cylindrical shape, or a non-uniform cone The frustum shape is either a curved frustum of a cone or a grooved shape. 7. The two-roll continuous casting slab cornering device with inclined rolls according to claim 1, characterized in that: the diameter of the chamfering roll (1) is 100-350 mm, and the roll surface of the chamfering roll (1) The length is 100-350mm. 8. The two-roll continuous casting slab cornering device with inclined rolls according to claim 1, characterized in that: the driving force for driving the push rod (5) is hydraulic pressure, electric power or mechanical force. 9. The two-roll continuous casting slab cornering device with inclined rolls according to claim 1, characterized in that the device is arranged at the exit of the continuous casting machine, or inside the segment of the continuous casting machine. 10. The two-roll continuous casting slab corner rolling device with inclined rolls according to claim 1, characterized in that: the device is used for corner rolling of billets, rectangular billets or slabs, and the applicable continuous casting slab thickness is 90mm ~ 500mm. 11. The two-roll continuous casting slab corner rolling device with inclined rolls according to claim 1, characterized in that: the device is suitable for rolling chamfered continuous casting slabs, and is also suitable for right angle casting slabs and arc corners Continuous casting slab rolling.