JPH04322846A - Winder for hoop-like cast strip by continuous casting - Google Patents

Abstract

PURPOSE:To wind at sufficient high temp. without developing excess tension to a hoop-like cast strip by arranging loading rollers on inner face of cylindrical part for coiling the hoop-like cast strip and adjusting pressing pressure with flanges and rotary rolls. CONSTITUTION:A bobbin 4 providing the cylindrical part 3 and the flanges 2-1, 2-2 arranged at both ends, is arranged and the two turning rolls 5, 6 are horizontally arranged. At the time of turning the turning rolls 5, 6 to the arrow mark 20 direction, the bobbin 4 is rotated to the arrow mark 21 direction with contact friction force. The loading rollers 7-1, 7-2 adjusts the load P to control the flanges 2-1, 2-2 to the contacting pressure with the rotary rolls 5, 6. In the case of increasing the load of loading rollers 7-1, 7-2, the contacting pressures between the flanges and the turning rolls are increased, slippage between the flange and the turning roll is made to little and rotary peripheral speed of the flange is approached to the prescribed speed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding device used for winding a thin strip produced by continuous casting into a coil.

0002

BACKGROUND OF THE INVENTION In recent years, various continuous casting methods have been developed for manufacturing strip-shaped metal slabs. These strip-shaped slabs are wound into a coil. FIG. 3 is an example of manufacturing a strip-shaped slab by the twin-roll continuous casting method. Molten metal 8 is injected into a pool 10 formed by twin rolls 9-1, 9-2 rotating in the direction of arrow 15 and a side weir (not shown). The molten metal in the pool is cooled by twin rolls and solidified shells 11-1 and 1
The solidified shells 11-1 and 11-2 are unified by the rotation of the twin rolls, and are taken out in the direction of the arrow 16 as a strip-shaped slab 1. The taken-out slab 1 is wound up by a mandrel 12 rotating in the direction of an arrow 17, and becomes a coiled strip 18.

[0003] In twin roll continuous casting, the operation is controlled by changing the rotational speed V1 of the twin rolls 9-1 and 9-2 during operation. When changing the rotational speed V1 of the twin rolls 9-1 and 9-2, the rotational speed V2 of the mandrel 12 is changed to follow V1. Unlike strips manufactured by rolling,
In twin-roll continuous casting, the temperature of the strip-shaped slab in the twin rolls 9-1 and 9-2 decreases significantly while it reaches the mandrel 12. Therefore, during this period, the length of the strip-shaped cast piece undergoes heat shrinkage, but it is difficult to accurately predict the amount of heat shrinkage. Also, unlike a strip produced by rolling, the strip is subjected to strain deformation 14 as exemplified by the waveform in FIG. 3 due to cooling between the twin rolls 9-1, 9-2 and the mandrel 12. For this strain deformation, twin rolls 9-1, 9-2 and mandrel 1 are used.
It is difficult to accurately predict the amount of change in the length of the strip running path between 2 and 3.

As already mentioned, during operation, the twin rolls 9-1
, 9-2, the rotation speed V2 of the mandrel 12 is changed to follow V1. The length of the running path varies depending on the amount of heat shrinkage and strain deformation, so the rotation speed V2 of the mandrel 12 must be adjusted to exactly V1.
It is difficult to make it follow. If V2 does not accurately follow V1 (hereinafter abbreviated as speed mismatch) and, for example, the rotational speed of V2 is excessive, the traveling path of the strip slab moves from the solid line 1 in FIG. 3 to the dotted line 101. When reaching the running path 101, the strip-shaped slab 1 is pulled and breaks just below the twin rolls, resulting in a casting accident.

FIG. 4 shows an example of a twin-roll continuous casting method with a loop 19. In FIG. 4, even if there is a speed mismatch between the twin rolls and the mandrel, it is adjusted by the loop 19, so that the strip is not forcibly pulled in the direction of the arrow 16. However, unlike strips manufactured by rolling, strips have a cast structure, and therefore rapidly become hard and brittle as the temperature drops. Therefore, it is preferable to warm-roll the strip-shaped slab at a high temperature. In FIG. 4, since the loop 19 is provided, the total length of the running path of the strip-shaped slab 1 becomes long, and the amount of temperature drop of the strip-shaped slab 1 is large. Therefore, the mandrel 12 winds up hard and brittle strip-shaped slabs, but it is difficult to smoothly wind up strip-shaped slabs made of hard or brittle materials.

[0006] The twin-roll continuous casting method has been described as an example of the continuous casting method for manufacturing strip slabs, but other methods such as the belt continuous casting method and the Hazallet continuous casting method can also be used. A speed mismatch is likely to occur between the speed and the rotational speed of the winding mandrel, and for this reason, troubles such as breakage of the slab are likely to occur in continuous casting of strip slabs.

[0007]

[Problems to be Solved by the Invention] The present invention solves the problem of
A continuous cast slab that does not generate excessive tension in the slab even when the length of the slab changes during transportation, and can be rolled up at a sufficiently high temperature. Our goal is to provide a winding device for this purpose.

[0008]

[Means for Solving the Problems] Fig. 1 is an explanatory view of the main parts of a winding device of the present invention, in which (A) is a front view and (B) is a side view in the direction of the arrows. The winding device of the present invention includes a bobbin 4 including a cylindrical portion 3 and flanges 2-1 and 2-2 provided at both ends of the cylindrical portion 3.
have. It also has two rotating rolls 5 and 6 arranged horizontally. A bobbin 4 is placed on the rotating rolls 5 and 6, and the flanges 2-1 and 2-2 of the bobbin 4 are supported by the rotating rolls 5 and 6. When the rotating rolls 5 and 6 are rotated in the direction of the arrow 20, the bobbin 4 is moved in the direction indicated by the arrow 20 due to the frictional force of contact with the rotating rolls 5 and 6.
Rotate in the direction. By this rotation of the bobbin 4, the strip-shaped slab 1 is wound up on the cylindrical portion 3 of the bobbin 4, and becomes a coil-shaped strip-shaped slab 18.

The basic configuration of the winding device of the present invention has been described above, but in the winding device of the present invention, which is developed from the basic structure, the winding device of the present invention further includes load rollers 7 (7-1, 7- 2)
have. The load rollers 7-1 and 7-2 adjust the load P and control the contact pressure between the collars 2-1 and 2-2 and the rotating rolls 5 and 6. Various known mechanical, hydraulic, and electrical means can be used to adjust the load P of the load rollers 7-1 and 7-2.

0010

[Operation] In the present invention, rotating rolls 5 and 6 are rotated at a desired circumferential speed V3. Since the bobbin 4 is rotated by the frictional force between the collar and the rotating roll, for example, when the winding resistance of the strip-shaped slab 1 (tension of the strip-shaped slab) is small, the bobbin 4 rotates at a circumferential speed close to V3. When the winding resistance of the strip-shaped slab 1 increases, the flanges 2-1 and 2-2 slip on the rotating rolls 5 and 6, and the circumferential speed thereof decreases, and the winding speed also decreases.

In the advanced winding device of the present invention described above, when the load on the load rollers 7-1 and 7-2 is increased, the contact pressure between the collar and the rotary roll increases, and the contact pressure between the collar and the rotary roll increases. The slippage between the two ends becomes smaller, and the rotational circumferential speed of the collar can be brought closer to V3.

FIG. 1C shows an example of a twin-roll continuous casting apparatus having a winding device of the present invention. In FIG. 1(C), when the circumferential speed of the twin rolls 9-1 and 9-2 is increased during operation, the speed of the strip-shaped slab 1 increases, and the winding resistance of the strip-shaped slab 1 decreases. At this time, the slippage between the collar and the rotating roll is small, so the bobbin 4 rotates at a high speed, and no speed mismatch occurs with respect to the circumferential speed of the twin rolls 9-1 and 9-2. If the circumferential speed of the twin rolls 9-1 and 9-2 is reduced, or if the heat shrinkage of the strip between the twin rolls and the winding device becomes large, or the strip will undergo strain deformation (14).
When this occurs, the feeding speed of the strip-shaped slab 1 to the bobbin 4 becomes slow, and the winding resistance of the strip-shaped slab 1 increases, but at this time, the slippage between the collar and the rotating roll increases. , the rotational speed of the bobbin 4 decreases. For this purpose, twin rolls 9-
No speed mismatch occurs with respect to the circumferential speeds of 1 and 9-2. Therefore, the running path of the strip-shaped slab does not change as shown by the dotted line 101, and no unreasonable tension is applied to the strip-shaped slab directly below the twin rolls.

The winding device of the present invention does not require the loop 19 shown in FIG. 4 in order to prevent speed mismatch, and therefore the running path of the strip strip is shortened and excessive cooling during running is prevented. This makes it possible to roll up the strip at a sufficiently high temperature. Therefore, it becomes possible to easily wind up the strip-shaped slab into a coil shape.

FIG. 2 is a diagram of another example of the winding device of the present invention. Although FIG. 1 describes an example in which the rotating rolls 5 and 6 are arranged at the same height, the rotating rolls 5 and 6 can also be provided at different heights as shown in FIG. In addition, in FIG. 1, the load roller 7 is arranged downward, and the load P acts downward and presses the rotary rolls 5 and 6. However, as shown in FIG. When the weight of the bobbin and the coiled strip is increased due to a large amount of rolled-up strip, an upward load P' is applied to adjust the weight increase. It may also be a roller.

Although an example has been described in which the winding device of the present invention is used in twin-roll continuous casting, the winding device of the present invention can also be used in other continuous casting methods such as belt continuous casting and Hazalle casting.
The T-type continuous casting method can solve the problems caused by the speed mismatch of the winding mandrel in the same way as the twin-roll method. Therefore, the present invention includes a winding device having the structure of the present invention, which is used in a method of manufacturing a strip-shaped slab other than the twin-roll continuous casting method.

[0016]

[Effects of the Invention] When the winding device of the present invention is used, during continuous casting of strip cast slabs, the length of the strip cast slabs during conveyance can be reduced when the casting speed is changed or due to fluctuations in the amount of heat shrinkage or occurrence of strain deformation. Even when the temperature fluctuates, excessive tension is not generated in the strip-shaped slab, and the strip-shaped slab can be rolled up at a sufficiently high temperature. This prevents the strip from breaking, and
It becomes easy to wind up the strip-shaped slab into a coil shape.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the main parts of the winding device of the present invention, FIG. 2 is an explanatory diagram of the main parts of another winding device of the present invention, and FIG. 3 is a diagram of the conventional winding device in twin-roll continuous casting. FIG. 4 is an explanatory diagram of another conventional winding device in twin-roll continuous casting.

[Explanation of symbols]

1: Band-shaped slab, 2-1 (2-2): Tsuba, 3: Cylindrical part, 4: Bobbin, 5: Rotating roll, 6: Rotating roll, 7: Load roller, 8: Molten metal, 9-
1 (9-2): Twin roll, 10: Hot water pool, 11
-1 (11-2): Solidified shell, 12: Mandrel, 13: Pinch roll, 14: Strain deformation, 1
5: Rotation direction of twin rolls, 16: Take-out direction of strip-shaped slab, 17: Rotation direction of mandrel, 18: Coiled strip-shaped slab, 19: Loop, 20: Rotation direction of rotating roll, 21: Tsuba direction of rotation.

Claims (2)

[Claims] Claim 1: A bobbin 4 comprising a cylindrical part 3 around which a strip cast slab 1 is wound, and flanges 2-1 and 2-2 provided at both ends of the cylindrical part 3.
It has two rotating rolls 5 and 6, and the rotating rolls 5 and 6 support the collars 2-1 and 2-2 and rotate the bobbin 4 by frictional force. , a device for winding up strips of slabs by continuous casting. 2. A bobbin 4 comprising a cylindrical part 3 around which a strip cast slab 1 is wound, and flanges 2-1 and 2-2 provided at both ends of the cylindrical part 3.
, two rotating rolls 5 and 6, and a load roller 7 arranged on the inner surface of the cylindrical part 3, and the rotating rolls 5 and 6 are attached to the collar 2.
-1 and 2-2, the bobbin 4 is rotated by frictional force, and the load roller 7 adjusts the pressing pressure between the flanges 2-1 and 2-2 and the rotating rolls 5 and 6. Features: A device for winding up strips of slabs through continuous casting.