JPH02133150A - Continuous casting equipment - Google Patents

Abstract

PURPOSE:To prevent the development of crack on surface of a steel strip by arranging tip part guide member between a roll type continuous casting machine and a coiler and forming free loop zone in the belt shaped steel strip between the continuous casting machine and the coiler by turning out this guide member. CONSTITUTION:In the roll type continuous casting machine 1, by rotating the rolls 4a, 4b, the belt shaped steel strip 5 is cast. In the downstream side, the coiler 6 is arranged. Then, the steel strip tip part guide member 7 for guiding the tip part of the cast steel strip 5 to the coiler 6 is arranged as freely turning out between the continuous casting machine 1 and the coiler 6. By turning out this guide member 7, the free loop zone A of the steel strip 5 is formed at between the continuous casting machine 1 and the coiler 6. By this method, the development of crack on surface of the steel strip can be prevented.

Description

Detailed Description of the Invention [Industrial Application Field 1] The present invention relates to continuous casting equipment for continuously casting strips, and in particular to a roll-type continuous casting δ9 equipment for casting molten metal into strips using rolls. It is related to.

[Prior art] Conventional roll-type continuous casting equipment continuously casts molten steel flowing out of a tandem sheet into a strip by rotating rolls, and does not guide the strip steel plate downstream of the rolls using guide rollers. It is designed to be guided to a winder and wound up, and the cast steel strip is wound up without forming a free loop.

[Problem to be solved by the invention] However, in the conventional roll type continuous casting equipment described above,
Since the cast steel strip is guided along guide rollers to a winder and wound up by the winder, cracks tend to occur on the surface of the steel strip when it is wound onto the winder. There is.

SUMMARY OF THE INVENTION Therefore, the present invention aims to provide a roll-type continuous casting equipment capable of winding up a strip-shaped steel plate cast by rolls onto a winder without causing cracks on the surface.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a tip kite member for covering the tip of a strip steel plate cast from a roll type continuous casting machine on the downstream side of the continuous casting machine. and a winder for winding the strip steel plate guided by the tip guide member, and a skin pass mill is disposed between the roll type continuous casting machine and the winder. The structure further includes a loop detector for detecting a looping state of the steel strip in a free loop zone of the steel strip between the continuous casting machine and the winding machine, and the winding machine uses a detection signal from the loop detector. Alternatively, a configuration may be adopted in which the rotational speed of the motor of the skin pass mill or the like is controlled.

[Function] The tip of a strip steel plate cast from a roll-type continuous casting machine is
When the tip guide member guides the caster to the winder and winds it up, the tip guide member is moved back to create a free loop zone between the continuous casting machine and the winder. As a result, the cast steel strip is smoothly wound around the winder while forming a free loop, and cracks do not occur on the surface of the steel strip during winding. Further, when the steel strip is rolled down in the free loop zone using a skin pass mill, the surface is compressed and cracks are less likely to occur. If the free loop in the free loop zone fluctuates due to the winding speed of the winding machine, etc., it is detected by the loop detector and fed back to the motor of the downstream equipment, so that the winding speed etc. can be adjusted.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, in which a roll-type continuous casting machine 1 is used, in which molten steel 3 discharged from a tundish 2 is cast as a strip steel plate 5 from between twin rolls 4a and 4b. On the downstream side, the roll type continuous casting machine 1 is installed.
The tip of the steel strip 5 cast and produced by the winder 6
A steel plate tip guide member 7 is arranged to guide the
A cylinder device 9 in which the steel plate tip guide member 7 is placed movably in the horizontal direction on a rail 8 and supported on the rail 8.
By pushing and pulling the strip steel plate 5, it is moved forward in the direction of the winder 6 and set at a position where the tip of the strip steel plate 5 can be guided, and it can be retreated from that position, so that the tip of the strip steel plate 5 is When the steel plate reaches the winder 6 and is ready to be rolled up, the steel plate tip guide member 7 is moved backward by the cylinder device 9, so that the strip steel plate is moved between the roll type continuous casting machine 1 and the winder 6. 5 free loop zone A should be avoided.

The winding machine 6 is an example, and forms a guide gap 12 in which the tip of the strip steel plate 5 is guided and inserted into a mandrel 11 rotated by a motor 10, and enters the guide gap 12. A grip device 13 is provided to grip the tip of the steel plate 5 that has been placed, and the steel plate 5 is placed in the kite cavity 12.
When the entrance of the tip of the steel plate 5 is detected by a detection device (not shown), the gripping device 13 is automatically operated to grip the steel plate 5, and at the same time, the motor 1
0 is activated to cause the mandrel 11 to rotate.

14 is a snapper roll located near the mandrel 11 and used to press down the steel plate 5.

When starting continuous casting by starting to cast the strip steel plate 5 from the roll type continuous casting machine 1, first, the continuous casting machine 1 is started.
The steel plate tip guide member 7 is moved forward and positioned below the twin rolls 4a and 4b as shown by the two-dot chain line. or,
The winder 6 keeps the guide gap 12 horizontal so that the tip of the steel plate can easily enter the guide gap 12.

When the steel plate 5 is cast out in a strip shape from between the twin rolls 4a and 4b of the continuous casting machine 1 in the above state, the tip of the strip steel plate 5 is aligned with the arc-shaped guide surface of the tip guide member 7. It is guided to the winder 6 downstream. When the tip of the strip steel plate 5 reaches the winder 6 and is inserted into the guide gap 12 of the mandrel 11, it is detected by a detection device (not shown) and the grip device 13 is automatically activated. , steel plate 5
The tip of the kite is gripped by the kite cavity 12.

When the tip of the steel plate 5 is gripped by the grip device @13,
Since the motor 10 is started, the mandrel 11 begins to rotate in the direction of the arrow and begins to wind up the strip steel plate 5.

In the tip guide member 7, the tip of the strip steel plate 5 is connected to the winder 6.
When gripped by the inner gripping device 13, the cylinder device 9 moves the rail 8 back to the position shown by the solid line so that it does not come into contact with the strip steel plate 5, and the double roll 4
A, 4b and the winder 6 are provided as a free loop zone for the steel strip 5. As a result, the strip steel plate 5 forms a free loop and is wound up by the winder 6, so that the steel plate 5 can be wound up without cracking the surface during winding.

In the above embodiment, the loop detector 15.16 is disposed in the free loop zone A so as to sandwich the strip steel plate 5, and the loop detector 15.16 and the control device 1 of the motor 10 are connected to each other.
The motor 10 is connected to
It is possible to add a circuit configuration that changes the rotation speed of the motor.

With the above configuration, when the steel plate 5 becomes too slack in the free loop zone A between the continuous casting machine 1 and the winder 6, the loop is detected by the steel plate 5 coming into contact with the loop detector 16. A control command to increase the rotational speed of the motor 10 is issued. This changes the rotational speed of the motor 10, increases the winding speed of the winder 6, and eliminates slack in the steel plate 5. When the steel plate 5 leaves the loop detector 16, the motor 10 returns to its original rotational speed. On the other hand, when the steel plate 5 contacts the loop detector 15, the loop detector 15 is activated and a control command is issued to reduce the rotational speed of the motor 10.
0, the winding speed of the steel plate 5 by the winder 6 is reduced, and the steel plate 5 is loosened.

In this manner, by providing the loop detectors 15 and 16, the steel plate 5 can be wound while being maintained so as not to be stretched too much or loosened too much in the free loop zone A.

FIG. 2 shows another embodiment of the present invention, in which a skin pass mill 20 is arranged between the roll type continuous casting Ia1 and the winder 6, and a light reduction is applied to the strip steel plate 5 in the free loop zone 8. This is what I did.

When the strip steel plate 5 is lightly rolled down by the skin pass mill 20, the surface of the steel plate 5 is compressed, so that it is possible to further reduce the occurrence of cracks on the surface of the steel plate 5 when it is wound up by the winder 6.

In the embodiment shown in FIG. 2, the case is shown in which the skin pass mill 20 is installed near the continuous & 5 machine 1, but it may be installed near the winder 6.

Next, FIG. 3 shows another embodiment of the present invention, which includes a roll-type continuous casting machine 1 and a winding machine installed downstream of the roll-type continuous casting machine 1 to wind up a steel plate 5 without applying tension. A descaler 19 and a skin pass mill 20 are disposed in the free loop zone A between the strip steel plate 5 and the skin pass mill 20, and a bending roll 21 is disposed on the exit side of the skin pass mill 20 to apply bending force to the steel strip 5 before winding. In addition, as the winding machine 6, instead of the winding machine 6 having the construction shown in FIGS. The other configuration is the same as that shown in FIG. 22 is an inert gas injection pipe for injecting inert gas into the casing covering the descaler 19 and the skin pass mill 20, 23 and 24 are motors for driving each of the descaler 19 and the skin pass mill 20, and 25 is a pinch roll.

According to the embodiment shown in FIG. 3, the steel strip 5 taken out from between the twin rolls 4a and 4b of the continuous casting machine 1 passes through the free loop zone Δ before being wound up by the winding machine 6. The scale on the surface of the steel plate 5 is removed by step 19, and a light reduction is applied to the steel plate 5 by the skin pass mill 20 to compress the surface of the steel plate 5 to make it difficult to crack. Since the steel plate 5 is bent to a required curvature by the roll 21, it can be wound without applying tension to the winder 6, and the surface of the steel plate 5 is less likely to be cracked during winding. In the above, the bending roll 21 includes the steel plate 5
The winding radius of curvature can be arbitrarily selected so that the winding machine 1 can wind up the material without applying tension, so that the plate thickness and
Depending on the material, the curvature of the steel plate 5 can be set to a limit value that is less likely to cause cracks.

It should be noted that the present invention is not limited to the above-mentioned embodiments. For example, as the winding machine 6, in FIG. However, any other type than shown may be used as long as the tip of the steel plate 5 can be grasped and rolled up. Further, in accordance with FIG. 3, in the embodiment, if the rotation speed of each motor 23, 24 of the downstream descaler 19 and skin pass mill 20 is controlled by the operation of the loop detector 15, 16, the free loop of the steel plate 5 can be properly controlled. Of course, it can be adjusted to Furthermore, twin rolls 4a, 4
Although the case of b is shown, it is not necessary to use twin rolls, and the steel plate tip guide member 7 may be of a swing type.

[Effect of the invention 1 As described above, according to the continuous casting equipment of the present invention, the roll-type continuous casting machine is equipped with a winder for taking out the strip steel plate on the upstream side, and the roll-type continuous casting machine and the winding machine are provided on the upstream side of the roll-type continuous casting machine. A steel plate tip guide member that guides only the tip of the strip steel plate is movably provided between the handler and the strip steel plate to form a free loop zone, so that the strip steel plate taken out is not wound up. The steel strip is not pulled and wound by a machine, and cracks do not occur on the surface when the steel strip is wound.
In addition, by applying light reduction to the steel plate using a skin pass mill, the surface of the steel plate can be compressed, making it more difficult to break.Furthermore, the looping of the steel plate in the free loop zone can be detected using a loop detector. Modification J: By doing so, excellent effects such as automatically preventing the steel plate from becoming too loose or stretched can be achieved.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing one embodiment of the invention, FIG. 2 is a schematic diagram showing another embodiment of the invention, and FIG. 3 is a vIR schematic diagram showing still another embodiment of the invention. DESCRIPTION OF SYMBOLS 1...Roll type continuous casting machine, 2...Tundish, 4a, 4b...Roll, 5...Strip steel plate, 6...
・Rewinder, 7... Steel plate tip guide member, 15.16・
... Loop detector, 17... Control device, 18... Winding, 19... Descaler, 20... Skin pass mill, 21... Bending roll, 23.24...
Motor, △...Free loop zone.

Claims (3)

[Claims] (1) Equipped with a roll-type continuous casting machine that casts a steel plate in a strip shape by rotating rolls, and a winding machine on the downstream side thereof, and between the roll-type continuous casting machine and the winding machine, the casting is carried out. A steel plate tip guide member for guiding the tip of the strip steel plate to the winding machine is retractably provided, and a free loop zone of the strip steel plate is created between the continuous casting machine and the winding machine by retracting the steel plate tip guide member. Continuous casting equipment characterized by being able to form. (2) The continuous casting equipment according to claim (1), wherein a skin pass mill is installed between the roll type continuous casting machine and the winding machine, and a light reduction is applied to the strip steel plate in the free loop zone. (3) A loop detector is provided to detect looping of the free loop of the steel strip in the free loop zone formed between the roll type continuous casting machine and the winder, and a signal from the loop detector detects the looping of the free loop of the steel strip. Continuous casting equipment according to claims (1) and (2), further comprising a circuit for controlling the rotational speed of a motor of downstream equipment that can adjust feed.