JPH10137814A - Surface cutting equipment for hot plate - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To avoid fluttering of a plate when cutting the surface of a hot plate using a rotary cutting blade. SOLUTION: At least one of an entrance side and an exit side of a rotary drum for cutting by sandwiching a hot plate material in a plate thickness direction,
A press roll or a pinch roll for suppressing flapping of the hot plate material is arranged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device useful for surface processing and maintenance of a hot plate material including a hot metal piece (slab, sheet bar, etc.) or a hot steel strip. Hereinafter, an example will be described in which a raised portion generated when such a hot plate material is butt-joined at its end is processed in a continuous transport state of the plate material.

[0002] In continuous hot rolling of a hot plate having a relatively large thickness, such as a sheet bar, the rear end of a preceding plate is moved between a rough rolling step and a finish rolling step from the viewpoint of improving production efficiency. And the leading end of the following plate material is butt-joined and continuously fed to the finish rolling step.

[0003] By the way, in such a rolling method, a joining portion rises at the time of joining a sheet material, and when this is rolled down in a finish rolling process, the sheet may be broken or a surface flaw may be generated. The process of cutting the bulge of the joint was performed with a drum-type rotary blade that sandwiches the plate material in the thickness direction, but cutting using a rotary blade is effective in increasing cutting efficiency, but cutting is effective. The tension of the plate fluctuates due to the reaction force (cutting force reaction force) as shown in FIG.
In this case, the plate material 2 flaps on the table roll 12 for conveyance, and in this case, not only can a uniform and smooth processing surface be obtained on both sides of the plate material, but also on the entrance side and the exit side of the cutting device. The tension of the sheet material fluctuates greatly, and this fluctuation has a bad influence on the thickness of the sheet in the rolling process, and also causes a great disturbance in the tension control in the sheet material joining apparatus and the sheet material rewinding equipment.

[0004] When the fluttering of the plate is particularly severe, the peripheral equipment is damaged by contact with the plate and the surface of the plate is damaged. Therefore, it is desired to develop a technique capable of avoiding such flutter. I was

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to cut the surface of a hot plate such as a steel strip or a sheet bar over the entire length thereof, or to flutter the plate when removing a protruding portion generated when the plate is joined as described above. It is to propose a new cutting device that can suppress the occurrence of cracks.

[0006]

SUMMARY OF THE INVENTION The present invention is an apparatus for continuously or intermittently cutting the front and back surfaces of a pair of drums rotating in opposite directions through a hot plate material. Is a surface cutting device for a hot plate material, characterized in that at least one of the entrance side and the exit side of the rotary drum has a press roll or a pinch roll for suppressing fluttering of the hot plate material, As the pressing roll, in particular, a roll composed of a pair of rolls sandwiching a hot plate in the thickness direction thereof, or a single roll sandwiching the hot plate in cooperation with a table roll for transport of the hot plate. Is advantageously fitted.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a roll or a pinch roll for holding the hot plate material is arranged on at least one of the entrance side and the exit side when cutting the hot plate material between the drum pairs. In addition, the flapping that occurs when cutting the hot plate material is suppressed, and not only a uniform and smooth processed surface can be obtained, but also no damage to the equipment is caused. In addition, the tension of the sheet material is a relatively stable change generated only by the cutting reaction force of the pair of rotating drums when the hot sheet material is pressed by the press roll or the pinch roll. Feedback can be provided, and quality can be improved by reducing the thickness variation.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically with reference to the drawings. 3, FIG. 4 is a front of the cutting device according to the invention, merely indicate side (shown simplified for the side surface), heat comprises a d _1, d ₂ is the plurality of surface cutting edge 1 in Fig. This is a drum pair having a body larger than the width of the intermediate plate member 2. The drum pairs d ₁ and d ₂ are rotatably incorporated in the frame h via bearings 3 and 4, respectively.

Reference numerals 5 and 6 denote drums d which are arranged between the frame h and the bearings (actually, housings housing the bearings).
_1, the d ₂ lower cylinder to move respectively upwardly, 7 drum d _1, an electric motor for driving the d _2, 8 is a reduction gear connected to the electric motor, 9 reduction gear 8 and the drum d _1, d ₂
Spindles 10a and 10b are drums d ₁ and d ₂
The non-driving type pressing roll shown in the example arranged on the entrance side and the exit side of FIG. 1, a cylinder 11 for vertically moving the pressing rolls 10a, 10b, and a table roller 12 for conveying the hot plate material 2.

When the surface of the hot plate material 2 such as a sheet bar is cut over its entire length, first, the cylinders 5 and 6 are driven to move the drums d ₁ and d ₂ up and down to secure a cutting allowance. Positioning at a level that can be done. Then, drive the cylinder 11 to hold down the roll 10
a and 10b are moved downward, the hot plate 2 is sandwiched by cooperation with the table roller 12, the plate 2 is fed while maintaining this state, and the drums d ₁ and d ₂ are rotated to perform surface cutting. Do.

Even if the plate material 2 is cut in the manner described above, the pressing rolls 10 are provided on the entrance and exit sides of the drums d ₁ and d _2.
Since a and 10b are arranged, the plate material 2 does not flutter due to cutting.

FIG. 5 shows a pair of upper and lower pinch rolls instead of the holding rolls 10a and 10b on the entrance and exit sides of the drums d ₁ and d _2.
This is an example in which 13a and 13b are arranged between the table roll 12 and the drum. Also in this case, the plate 2 is a drum d
_1, the input side of d _2, the outlet side of the pair of upper and lower pinch rolls 13a, 13b
The plate material 2 does not flutter during cutting.

FIG. 6 shows a case where the plate material is cut by using the apparatus provided with the non-driving pressing rolls shown in FIGS. 3 and 4 and nothing to press the plate material on the entrance side and the exit side of the drum is provided. FIG. 9 is a diagram comparing the state of fluctuation of the tension in the case.

As is apparent from FIG. 1, when the plate material fluctuates during the cutting of the plate material, the tension is irregular and greatly fluctuates, but the plate material is pressed on the entrance side and the exit side of the drum. In such a case, the irregular and large fluctuations disappear, and the tension changes slowly due to the cutting force.

When the pressing roll is of a non-driving type,
As is clear from FIG. 6 described above, it is difficult to suppress a gradual change in tension caused by the cutting resistance when the blade is pushed in and when the blade is retracted. However, when it is desired to reduce such a fluctuation, the drive source is required. It is particularly desirable to apply a pinch roll which can separately apply a torque to the plate material.

In FIGS. 4 and 5, the drum d₁, d
_TwoRolls 10a and 10b on the entrance and exit sides of
Although the example in which the pinch rolls 13a and 13b are arranged is shown,
D ₁, d_TwoBased on the relationship between the rotation direction of
And may be arranged on any one of them. For example,
In the case as shown in FIG.₁, d_TwoFlapping on the entry side of
Since it becomes particularly large, it can be placed only on the entrance side.
And the drum d in FIG.₁, d_TwoBut with reverse rotation
In this case, only the delivery side is
Can be placed.

In the embodiment of the present invention, the case where the entire area in the width direction of the plate material is cut over the entire length thereof (such as a slab or the like)
(Surface treatment of steel strip etc.) was explained, but the present invention is not only applicable to the case of removing the raised portion generated at the time of butt joining of the metal pieces as described above, but also to the partial cutting in the width direction of the plate material. Applicable.

[0018]

According to the present invention, it is possible to suppress the flapping of the plate caused when the surface of the hot plate is cut with a rotary blade, so that the contact with the plate causes damage to the equipment or the plate. Not only is there no risk of causing scratches, but also a uniform and smooth processed surface can be obtained. Also, since there is only a gradual tension variation that occurs only due to the cutting reaction force, especially in a line such as continuous hot rolling where each process is linked, such a tension variation is predicted as a disturbance and rolling is performed. Since the feedback can be provided to the process side, the thickness accuracy can be further improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a relationship between cutting resistance and reaction force of cutting resistance.

FIG. 2 is an explanatory diagram of a fluttering state of a plate when a plate material is cut by a rotary blade.

FIG. 3 shows a front view of a cutting device according to the present invention.

FIG. 4 is a diagram showing a simplified side view of only a main part of a cutting device according to the present invention.

FIG. 5 is a diagram showing another example of the cutting device (main part of the side surface of the device) according to the present invention.

FIG. 6 is a diagram showing a comparison of tension fluctuation states of the plate when the plate material is pressed and when the plate material is not pressed.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Cutting blade 2 Hot plate material 3 Bearing 4 Bearing 5 Cylinder 6 Cylinder 7 Electric motor 8 Reduction gear 9 Spindle 10a Pressing roll 10b Pressing roll 11 Cylinder 12 Table roll 13a Pinch roll 13b Pinch roll d ₁ drum d ₂ drum h Frame

Continued on the front page (72) Inventor Hideyuki Nikaido 1 Kawasaki-cho, Chuo-ku, Chiba City, Chiba Prefecture Inside Kawasaki Steel Works Chiba Works (72) Inventor Jun Yuki 1 Kawasaki-cho, Chuo-ku, Chiba City, Chiba Prefecture Kawasaki Steel Corporation (72) Inventor Kanji Hayashi 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture Mitsubishi Heavy Industries, Ltd.Hiroshima Works (72) Inventor Katsumi Tashiro 4-6-22 Kanon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture No. Mitsubishi Heavy Industries, Ltd. Hiroshima Works (72) Inventor Osamu Nakagawa 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima-shi, Hiroshima Mitsubishi Heavy Industries, Ltd. Hiroshima Works

Claims (2)

[Claims] 1. A device for continuously or intermittently cutting the front and back surfaces of a pair of drums rotating in opposite directions through a hot plate material, the device comprising an inlet and an outlet of a rotary drum. A hot plate material surface cutting device, characterized in that at least one of the sides has a press roll or a pinch roll for suppressing flapping of the hot plate material. 2. The press roll comprises a pair of rolls for sandwiching the hot plate in the thickness direction thereof, or a single roll for sandwiching the hot plate in cooperation with a table roll for conveying the hot plate. The surface cutting device according to claim 1, wherein: