JP2993680B2 - Shearing device and shearing method, and hot rolling equipment and rolling method of hot rolling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a shearing device and a shearing method, and a hot rolling facility and a rolling method of a hot rolling facility, and in particular, a small-scale rolling facility, for example, The present invention relates to a shearing device and a shearing method suitable for a Steckel mill type facility, a hot rolling facility and a rolling method of a hot rolling facility.

[Conventional technology]

Conventional small-scale rolling equipment is a Steckel mill type equipment mainly used for rolling special steel such as stainless steel. FIG. 8 shows an example of the arrangement of the general equipment. This equipment has two rolling mills, a rough mill 1 and a finishing mill 2. The slab 4 cast by the continuous caster 3 is heated or soaked in the heating furnace 5, and the slab extracted from the heating furnace 5 is heated. 4 is subjected to several passes of reversing rolling in a rough mill 1 to about 20 to 25 mm, and then conveyed to a finishing mill 2. In the finishing mill 2, furnace coilers 6 a, 6 b are arranged on the inlet and outlet sides, and a chopper 7 (shearing device) is arranged between the inlet furnace coiler 6 a and the coarse mill 1. Further, the crop shear 7 is arranged at a distance from the coarse mill 1 so as not to be affected by the path of the coarse mill 1. Rolled material 4a after rough pass
Is cut at the leading and trailing ends by a crop shear 7, rolled by a finishing mill 2 and wound up by an outgoing furnace coiler 6b. The rolled material 4a that has been sing-rolled and then rolled to a predetermined thickness is conveyed to the down coiler 8 by a run-out table and wound up. Due to such a method, the rolled material 4a passing through the crop shear 7 is limited to about 20 to 25 mm, is relatively thin, and easily passes through the gap between the upper and lower drums on the side of the shear drum forming the crop shear 7 where there is no blade. Is possible. Further, the shear frame and the drum bearing are configured to be separable so as to facilitate reassembly and maintenance, but are functionally fixedly supported at a predetermined position. For this reason, the distance between the coarse mill 1 and the finishing miner 2 is generally about 70 to 80 m, and the ratio of the total length of the equipment is large.

Incidentally, as a hot rolling equipment combining a rough rolling mill and a finishing rolling mill, for example, is disclosed in Japanese Patent Publication No. 62-22682, and regarding the shearing machine, for example, JP-A-56-27718, It is disclosed in JP-A-58-147117.

[Problems to be solved by the invention]

In the above prior art, the number of rolling mills is greatly reduced to two as compared with the continuous hot rolling equipment system, but the distance between the rough mill and the finishing mill cannot be said to be much reduced. However, there was a problem in that the ratio of reducing the total length of the equipment became large. Also,
Passing the rolled material through the crop shear is a major issue.
That is, from the viewpoint of shortening the equipment length, it is necessary to bring the crop shear close to the rolling mill. In order to arrange the crop shear closely, it is necessary to pass all the thickness rolled by the rolling mill between the upper and lower drums of the crop shear. is necessary. However, in the conventional crop shears, no consideration was given to this point, and there was a problem in arranging the crop shears as before in order to shorten the equipment length.

A first object of the present invention is to provide a shearing device and a shearing method which facilitate passage of a thick rolled material that does not require shearing and can perform normal shearing.

A second object of the present invention is to perform reversing rolling, and
An object of the present invention is to provide a hot rolling facility and a method for rolling a hot rolling facility, which can shorten a facility length and ensure a temperature of a rolled material.

[Means for solving the problem]

A first object of the present invention is to have a pair of rotatable drums each having a shearing blade attached thereto, and to rotate the pair of drums at a predetermined time to shear the rolled material with the shearing blade. In the apparatus, a bearing box that supports the pair of drums, respectively, and a frame that fixes the bearing box so as to maintain a distance between the central axes of the pair of drums,
Means for raising the height position of the pair of drums while maintaining the distance between the pair of drums when passing the rolled material with respect to the height position of the pair of drums when shearing the rolled material. Means for lowering the height position of the pair of drums while maintaining the distance between the pair of drums when shearing the rolled material with respect to the height position of the pair of drums when passing the rolled material Are provided in the frame.

Alternatively, a first object of the present invention is to have a pair of rotatable drums each having a shearing blade attached thereto, and rotate the pair of drums at a predetermined time to shear the rolled material with the shearing blade. In the shearing method, the pair of drums are each supported by a bearing box, the bearing box is fixed by a frame, and when the rolled material is passed, the pair of drums is sheared when the rolled material is sheared. Raise the frame so as to raise the height position of the pair of drums while maintaining the distance between the pair of drums with respect to the height position, and pass the rolled material when shearing the rolled material. This is achieved by lowering the frame so as to lower the height of the pair of drums while maintaining the distance between the pair of drums relative to the height of the pair of drums.

Further, a second object of the present invention is to provide a continuous casting machine, a rolling mill for reversing rolling, and shearing the leading and trailing ends of a rolled material rolled by the rolling mill between the continuous casting machine and the rolling mill. A shearing device, and a furnace coiler for unwinding and rolling out a rolled material for reversing rolling on the entrance and exit sides of the rolling mill,
The shearing device has a pair of rotatable drums each having a shearing blade attached thereto, and rotates the pair of drums at a predetermined time to shear the rolled material with the shearing blade. And a bearing box for supporting the pair of drums, respectively, and a frame for fixing the bearing box so as to maintain a distance between central axes of the pair of drums,
Means for raising the height position of the pair of drums while maintaining the distance between the pair of drums when passing the rolled material with respect to the height position of the pair of drums when shearing the rolled material. Means for lowering the height position of the pair of drums while maintaining the distance between the pair of drums when shearing the rolled material with respect to the height position of the pair of drums when passing the rolled material Are provided on the frame.

Alternatively, a second object of the present invention is to provide a continuous casting machine, a rolling mill for reversing rolling, and shearing the front and rear ends of a rolled material rolled by the rolling mill between the continuous casting machine and the rolling mill. A rolling device for unwinding and rolling a rolled material for reversing rolling on the inlet and outlet sides of the rolling mill, and a rolling mill for hot rolling equipment, wherein the pair of drums are respectively provided. Supported by a bearing box, the bearing box is fixed by a frame,
And, raising the frame so as to raise the height position of the pair of drums while maintaining the distance between the pair of drums with respect to the height position of the pair of drums when shearing the rolled material, Pass the rolled material in a shearing device, then reversing-roll the rolled material to a predetermined thickness in the rolling mill, and then, the height position of the pair of drums when passing the rolled material The frame is lowered so as to lower the height position of the pair of drums while maintaining the distance between the pair of drums, and the front and rear ends of the rolled material are sheared by the shearing device. This is achieved by reversing rolling in a rolling mill.

[Action]

In the present invention, the slab is first subjected to reversing rolling to a predetermined thickness by one rolling mill, and thereafter, the front and rear ends of the material to be rolled are sheared with a crop shear, and the material to be rolled is guided again to the rolling mill. Then, the rolling mill is wound up by a furnace coiler provided on the entrance and exit side of the rolling mill, and the product thickness is obtained by reverse rolling while unwinding, so that only one rolling mill is required, and the equipment length is reduced. In addition, the upper and lower drums having a blade,
When passing through a rolled material that is supported at a predetermined interval and does not require shearing work, the center position between the upper and lower drums is higher than the center position between the drums during shearing, or the upper and lower drums are The distance between the upper and lower drums or between the upper and lower drums can be increased by maintaining the distance between the upper and lower drums above the pass line of the material to be sheared while keeping the A slab or a thick rolled material that does not require shearing can be easily passed between the flat portions. Also, when shearing, the frame is lowered so that the position of the blade with respect to the upper surface of the table becomes appropriate, so that normal cutting can be performed.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 7 shows an arrangement of a mini-hot strip mill equipped with a crop shear according to the present invention.

The configuration shown in this figure is an improvement of the structure of the crop shear 7 by omitting the coarse mill 1 from the arrangement shown in FIG.

 Hereinafter, the operation will be described with reference to FIG.

As shown in the figure, the slab 4 cast by the continuous caster 3
Is heated or soaked by the heating furnace 5 and conveyed to the rolling mill 2 where the material is reversed and rolled until the material thickness becomes about 25 mm.
Cut with This material is led to the rolling mill 2 and rolled, wound up by the furnace coiler 6b on the output side of the rolling mill 2, and further subjected to several pass reversing rolling through the rolling mill 2 between the output furnace coiler 6b and the entrance furnace coiler 6a. rear,
The product coil is wound by the down coiler 8 and manufactured.
As shown in the drawing, the crop shear 7 is installed between the heating furnace 5 and the rolling mill 2 and needs to pass through the slab 4.
Since the crop shear 7 in this embodiment has the ability, smooth rolling can be performed and the equipment length is shortened.

Next, the details of the crop shear 7 of the present invention will be described.

FIG. 1 is an explanatory view showing the structure of the cloth shear 7 and enabling passage through a slab.

FIG. 1A shows a crop shear of this embodiment. As shown in the figure, an upper and lower drum 10 having a cutting tool 11 is supported by a bearing box 12 and holds an A dimension (distance between the center axes of the upper and lower drums 10) which is effective for shearing. The frame 13 is fixed. The upper and lower drums 10 are formed to have flat portions. Frame 13
By the lifting cylinder 15 installed in the outer frame 14,
The outer frame 14 is configured to be able to move up and down. And
The frame 13 is fixed to the outer frame 14 at the upper and lower positions by the operation of the clamp cylinder 16, and the outer frame 14 is fixed to the foundation 17. On the other hand, a gear 18 is attached to the ends of the upper and lower drums 10 as shown in FIG. 2, and one drum shaft is connected by a spindle 19, a speed reducer 20, and a motor 21,
The rotation of the motor 21 rotates the upper and lower drums 10, and the upper and lower blades
11 comes into contact and the rolled material is sheared. Upper and lower blades when shearing
11 cuts the rolled material conveyed at the height of the pass line. At this time, the frame 13 is firmly fixed to the outer frame 14 by the clamp cylinder 16 with the lifting cylinder 15 pulled.

Next, the operation of the crop shear 7 of this embodiment will be described.

When a thick material such as a slab is passed, as shown in FIG. 1 (B), the both sides of the upper and lower drums 10 are rotated so that the flat portions face each other, and the gap between the upper and lower drums 10 is enlarged. However, only an effective gap above the pass line, that is, an effective gap (a) is secured when passing a slab or the like, so that the slab cannot be passed through and the flat portion cannot be enlarged without increasing the diameter of the drum. Impossible than strength.
Therefore, as in this embodiment, the lifting cylinder 15 is pushed, that is, the frame 13 is set to the upper position, and the clamp cylinder 16 is pressed.
When the frame 13 is firmly fixed to the outer frame 14, the center position of the upper and lower drums 10 rises by B as shown in FIG. 1 (c), and an effective gap (b) is secured. . That is, the rising amount B of the upper and lower drums 10 is added to the effective gap (A) in FIG. 1B, and the gap necessary for the passage of the slab or the like is secured.

In order to secure the effective gap (b), the center position between the pair of drums 10 when the material to be sheared passes is set with respect to the center position between the pair of drums 10 when the material to be sheared is sheared. When the sheared material passes through the path line of the sheared material while maintaining a constant distance between the pair of drums 10 when the sheared material passes, or when the sheared material passes, a pair of The same is true even if the drum 10 is positioned asymmetrically with respect to the path line of the sheared material.

With the above configuration, it is possible to shear the rolling mill and pass the slab while holding the upper and lower drums 10 at the dimension of A. Also, as shown in FIG. 3, the same effect as that described in FIG. 1 can be obtained by flattening the drum 10 on the opposite side of the blade 11.

FIG. 4 shows a case where the upper and lower bearing housings 12 shown in FIG. 1 are integrated. In this case, the frame can be omitted, and a simpler crop shear is obtained.

FIG. 5 shows a cropper which raises and lowers only the upper drum 10a and enlarges the gap between the upper and lower drums 10a and 10b.
In the figure, the cylinder 22 moves up and down only the upper drum 10a, and the lower drum 10b is fixed to the outer frame 14 at all times.
In this case, since only the upper drum 10a moves up and down, the drum drive spindle 19 is required for each of the upper and lower. Also, the cylinder 22 needs to be strong to cope with the reaction force at the time of cutting.

In addition to this, as shown in FIG. 6, there is also a method in which the entire crop shear 7 is moved, and the crop shear 7 is moved to the rolled material passing line only at the time of crop cutting.

According to this embodiment described variously, the crop shear can pass through a thick rolled material such as a slab, and can be installed anywhere in the line, which is an effective means for shortening the equipment length of the rolling line, and shortening the equipment length. Thus, the equipment cost can be reduced, and the structure of the crop shear is simplified and the rigidity is increased, so that the kite can be reduced and the efficiency can be improved. Further, by shortening the equipment length, it is possible to secure the rolled material temperature, and to obtain effects such as obtaining a high quality product.

〔The invention's effect〕

ADVANTAGE OF THE INVENTION According to the shearing apparatus and the shearing method of this invention, it is easy to pass a thick rolled material which does not require shearing, and it is effective in performing normal shearing.

ADVANTAGE OF THE INVENTION According to the hot rolling equipment and the rolling method of the hot rolling equipment of the present invention, it is possible to perform reversing rolling, shorten the equipment length, and secure the temperature of the rolled material.

[Brief description of the drawings]

FIG. 1A is a sectional view showing an embodiment of the shearing device of the present invention, FIG. 1B is a sectional view of a pair of drums before movement, and FIG. 1C is a pair of drums after movement. FIG. 2 is a cross-sectional view of the drum, FIG. 2 is a side view of FIG. 1 (A), FIG. 3 (A) is a cross-sectional view showing another embodiment of the present invention, and FIG. FIG. 3 (C) is a cross-sectional view of a pair of drums after movement, FIG. 4 is a cross-sectional view showing still another embodiment of the present invention,
FIG. 5 is a side view showing an upper drum elevating type crop shear, FIG. 6 is a side view showing a moving type crop shear,
FIG. 7 is a layout diagram showing a hot rolling facility provided with a crop of the present invention, and FIG. 8 is a layout diagram showing a conventional hot rolling facility. 1 ... Rough rolling mill, 2 ... Finish rolling mill, 3 ... Continuous casting machine, 4
… Slab, 5… heating furnace, 6a… entry side funnel scoiler, 6B… exit side funnel scoiler, 7… cropsier, 8… downcoiler, 10… drum, 11… knife 12 ... Bearing box, 13 ... Frame, 14 ... Outer frame, 15 ... Elevating cylinder, 16 ... Clamp cylinder.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ identification symbol FI B22D 11/126 B22D 11/126 K (58) Investigated field (Int.Cl. ⁶ , DB name) B23D 25/12 B21B 1 / 00 B21B 1/32 B21B 15/00 B22D 11/12 B22D 11/126

Claims (5)

(57) [Claims] 1. A shearing device having a pair of rotatable drums each having a shearing blade attached thereto, and rotating the pair of drums at a predetermined time to shear a rolled material with the shearing blade. A bearing box for supporting each of the pair of drums, and a frame for fixing the bearing box so as to maintain the distance between the center axes of the pair of drums are provided, and the height of the pair of drums when shearing the rolled material is provided. Means for raising the height position of the pair of drums while maintaining the distance between the pair of drums when passing the rolled material, and the pair of drums when passing the rolled material. Means for lowering the height position of the pair of drums while maintaining the distance between the pair of drums when shearing the rolled material with respect to the height position. 2. A shearing device according to claim 1, further comprising means for clamping said frame from an inlet side and an outlet side of said shearing device. 3. A shearing method comprising: a pair of rotatable drums each having a shearing blade attached thereto; and rotating the pair of drums at a predetermined time to shear a rolled material with the shearing blade. Each of the pair of drums is supported by a bearing box, the bearing box is fixed by a frame, and when the rolled material is allowed to pass, the height position of the pair of drums when shearing the rolled material is determined. When raising the frame so as to raise the height position of the pair of drums while maintaining the distance between the pair of drums, when shearing the rolled material,
Lowering the frame so as to lower the height position of the pair of drums while maintaining the distance between the pair of drums with respect to the height position of the pair of drums when passing the rolled material. How to shear. 4. A continuous casting machine, a rolling mill for reversing rolling, a shearing device for shearing front and rear ends of a rolled material rolled by the rolling mill between the continuous casting machine and the rolling mill, Unwinds the rolled material for reversing rolling at the entrance and exit of the rolling mill,
A winding coiler, and the shearing device has a pair of rotatable drums each having a shearing blade attached thereto, and rotating the pair of drums at a predetermined time to rotate the shearing blade. A shearing device for shearing the rolled material, provided with a bearing box for supporting the pair of drums, respectively, and a frame for fixing the bearing box so as to maintain the distance between the central axes of the pair of drums, Means for raising the height position of the pair of drums while maintaining the distance between the pair of drums when passing the rolled material with respect to the height position of the pair of drums when shearing the rolled material. Means for lowering the height position of the pair of drums while maintaining the distance between the pair of drums when shearing the rolled material with respect to the height position of the pair of drums when passing the rolled material And Hot rolling mill system, characterized in that but on the serial frame. 5. A continuous casting machine, a rolling mill for reversing rolling, a shearing device for shearing front and rear ends of a rolled material rolled by the rolling mill between the continuous casting machine and the rolling mill, Unwinds the rolled material for reversing rolling at the entrance and exit of the rolling mill,
A method of rolling hot rolling equipment provided with a furnace coiler for winding, wherein each of the pair of drums is supported by a bearing box, the bearing box is fixed by a frame, and the rolled material is sheared. The frame is raised so as to raise the height position of the pair of drums while maintaining the distance between the pair of drums with respect to the height position of the pair of drums, and passes the rolled material in the shearing device. Then, reversing rolling the rolled material to a predetermined thickness in the rolling mill,
Thereafter, the frame is lowered so as to lower the height position of the pair of drums while maintaining the distance between the pair of drums with respect to the height position of the pair of drums when passing the rolled material. A rolling method for a hot rolling facility, wherein a front and rear end of the rolled material is sheared by a shearing device, and the rolled material is subjected to reversing rolling by the rolling mill.