JPH06210312A - Device for processing end part of metallic strip - Google Patents

Abstract

PURPOSE:To reduce impact that is acted on a rolling mill and to prevent the generation of lap mark or end mark, when a steel strip is coiled by providing rotary cutting blades or rolling rolls with which the end parts of a metallic strip are tapered along the width direction. CONSTITUTION:When the part to be cut of the metallic strip 21 is advanced to the position of the edges of upper and lower rotary circular blades 3a, 3b, the metallic strip 21 is stopped and held from above and below with clamps 11a, 11b by operating a hydraulic device. While revolving the upper and lower rotary circular blades 3a, 3b, they are moved from one side of the side ends of the metallic strip 21 to the other side by synchronizing an upper driving device 4a and a lower driving device 4b. The edges of the upper and lower rotary circular blades 3a, 3b simultaneously cut into the metallic strip 21, which is cut down along the width direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal band end processing device for forming a leading end or a rear end of a metal band into a wedge shape.

[0002]

2. Description of the Related Art When rolling a metal strip such as a hot rolled steel sheet, a rolling material such as a slab is heated and then roughly rolled to form a rough bar.
The tip of the rough bar has a protruding central part in the width direction or a concave shape (this part is called a crop), so it cannot be used as a product even if finish rolling, and finish rolling Since it becomes a factor that hits the rolling equipment and causes stripping troubles, it is removed by removing the end portion with a crop shear installed in front of the finishing mill.

Crop shear cutting usually involves rotating a pair of upper and lower rotating drums, each of which has a rectangular knife axially mounted on its surface, in opposite directions so that the upper and lower knives bite into the front and back surfaces of the coarse bar almost at the same time. It is done in the form of.

The cutting surface of the tip end of the rough bar cut by the crop shear as described above is substantially perpendicular to the front and back surfaces of the rough bar. Then, most of the hot-rolled steel sheet after finish rolling is wound into a coil, except for the extremely thick material.

Metal strips such as cold-rolled steel sheets and surface-treated steel sheets are repeatedly wound and unwound into a coil during the manufacturing / inspection process. At the winding start position of the metal band as described above, a step is formed between the surface of the winding reel or the surface of the winding sleeve and the tip of the metal band.

[0006]

However, the rough bar cut by the above-mentioned conventional crop shear is finish-rolled, or a metal strip such as a hot-rolled steel sheet, a cold-rolled steel sheet or a surface-treated steel sheet is wound into a coil, When rewound, there were the following problems.

(1) If the cutting surface is perpendicular to the surface of the rough bar, the impact load when the rough bar is caught in the finish rolling machine is large, and the finish rolling machine is easily damaged. (2) In order to reduce the impact load, it is necessary to slow down the rolling speed or reduce the rolling reduction, and the rolling efficiency is reduced. In addition, control technology for that is required.

(3) When a metal strip such as a hot-rolled steel sheet after finish rolling, a cold-rolled steel sheet, or a surface-treated steel sheet is wound around a coil, the tip of the metal strip remains in a rectangular shape. At the winding start position of the metal strip, a step is formed between the surface of the winding reel or the surface of the winding sleeve and the tip of the metal strip. After the second winding of the metal strip, a flaw or a bend (called a lap mark or an end mark) occurs at the step portion. The lap mark or end mark is
It decreases in inverse proportion to the increase in the number of turns, and eventually disappears. This wrap mark or end mark is continued from the beginning of winding up to several to ten or more turns, and the product value of all of this part is reduced, and part of it is discarded as scrap and cannot be a product.

As an attempt to solve this problem, regarding the treatment of the leading end of the steel sheet, Japanese Patent Laid-Open No. 54-121
260 and JP-A-58-32502. However, JP-A-54-12126
The invention described in Japanese Patent Publication No. 0 cannot achieve the cutting of the crop portion, and the one described in Japanese Patent Laid-Open Publication No. 58-32502 requires a flying shear.

An attempt to solve the problem by the winding method is as follows.
JP-B-54-34870, JP-B-54-3726
5, JP-B-56-25325, JP-A-59
-1019 and JP-A-62-124025. However, Japanese Examined Japanese Patent Publication 54-34870
The inventions described in Japanese Patent Publication No. 54-37265
Not only a high degree of control is required for alignment, but also a positional deviation occurs and a mismatch due to a thickness error of the steel sheet occurs. The inventions described in JP-B-56-25325 and JP-A-62-124025 have difficulty in sleeve durability, and in the invention described in JP-A-59-1019, a cushioning material cost is newly generated. A dedicated device for inserting the cushioning material is also required, and there are various problems such as collection and disposal of the cushioning material at the time of rewinding.

The present invention has been made in order to solve the above-mentioned problems of the prior art. The tip of the material to be rolled such as steel does not impact the rolling mill, and the metal strip such as steel is used. An object of the present invention is to provide a metal band edge processing device that does not generate a lap mark or an end mark when wound.

[0012]

A first metal band edge treating apparatus according to the present invention comprises a pair of upper and lower rotating circles each having an acute-angled cutting edge configured to be movable in the plate width direction. Further, the second metal band end treatment device according to the present invention comprises a conical pressure reducing wheel configured to be movable in the plate width direction.

Further, a third metal band edge processing device according to the present invention is a device in which a metal band heating means is added to the first or second metal band edge processing device. Further, a fourth metal band edge processing device according to the present invention is a device in which a metal band clamp means is added to the first, second or third metal band edge processing device.

[0014]

[Function] The front end or the rear end of a metal strip such as a hot-rolled material in hot rolling such as hot-rolled steel sheet or finish-rolled hot-rolled steel sheet, cold-rolled steel sheet or surface-treated steel sheet is moved in the sheet width direction. When the material to be rolled is bitten into the rolling mill, it is cut into a rolling mill by cutting it with a rotary circular blade to increase the plate thickness of the end portion from a state close to 0 to a predetermined thickness. It gives less impact, does not damage the rolling mill, and reduces the occurrence of lap marks or end marks when winding the metal strip around the coil.

Further, the thickness of the front or rear end of a hot rolled material in hot rolling such as a hot rolled steel sheet or a metal strip such as a finish rolled hot rolled steel sheet, cold rolled steel sheet or surface treated steel sheet A reduction wheel that moves in the width direction, and the plate thickness at the end is 0
When the material to be rolled is bitten into the rolling mill, the impact applied to the rolling mill is reduced and the rolling mill is not damaged when the material is bitten into the rolling mill. Less lap marks or end marks are produced when the metal strip is wound around the coil.

If the heating means is added to the above-mentioned metal strip end treatment device so that the front end portion of the metal strip is heated over the entire width and then cut, the above-mentioned action can be easily obtained even in the cold metal strip. To be Further, the one to which the clamp means is further added can easily obtain the above-mentioned operation in a state where the steel material is stabilized in the width direction.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A metal band edge treating apparatus according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side view of the metal strip edge treating apparatus, FIG. 2 is a sectional view of the metal strip edge treating apparatus in the rolling direction, and FIG. 3 is a front view of the metal strip edge treating apparatus.

This metal band edge treating apparatus comprises a pair of stands 1, two upper and lower rails 2a and 2b horizontally held by the pair of stands 1, and an upper rotary circular blade 3a.
The upper drive device 4a configured to be movable on the rail 2a while rotating the same, the lower drive device 4b configured to be movable on the rail 2b while rotating the lower rotary circular blade 3b, and the metal strip 21 in the vertical direction. A pair of clamps 11a and 11b sandwiched between the two and hydraulic devices 12a and 1b for operating the pair of clamps 11a and 11b, respectively.
2b, induction heating devices 13a and 13b for heating the metal strip 21 from the vertical direction to the width direction, and the upper rail 2
It is composed of a rail inclining device 14 for inclining a in the horizontal direction and a rail depressing device 15 for depressing the upper rail 2a downward.

The upper drive device 4a will be described in detail.
A rack 5a is provided on the upper surface of a, and a pinion 6a driven by an electric motor 16a and a speed reducer 17a meshes with the rack 5a. The pinion 6a is rotatably supported by a U-shaped frame body 7a arranged so as to straddle the rail 2a. A guide roll 8a that rotates while contacting the lower surface of the rail 2a is rotatably supported in the middle of the frame body 7a. A bearing 9a is provided at the lower end of the frame body 7a. The rotary shaft 10a of the above is pivotally supported.

The lower drive device 4b will be described in detail.
A rack 5b is provided on the lower surface of b, and a pinion 6b driven by an electric motor 16b and a speed reducer 17b meshes with the rack 5b. The pinion 6b is rotatably supported by a U-shaped frame 7b arranged so as to straddle the rail 2b. A guide roll 8b that rotates while contacting the upper surface of the rail 2b is rotatably supported in the middle of the frame body 7b, and a bearing 9b is provided at the upper end of the frame body 7b. The rotating shaft 10b of is supported.

Next, a procedure for cutting the metal strip 21 by this metal strip end processing device will be described. The rail position is adjusted by the rail inclining device 14 and the rail pressing device 15, and the blade tip of the upper rotary circular blade 3a and the lower rotary circular blade 3b are adjusted.
It is set in a state where it overlaps with the blade edge of the metal strip 21 and is made to stand by outside one side surface of the metal strip 21. When the portion of the metal band 21 to be cut advances to the positions of the cutting edge of the upper rotary circular blade 3a and the lower rotary circular blade 3b, the metal band 21 is stopped,
Actuating the hydraulic devices 12a and 12b, the clamp 1
The metal strip 21 is sandwiched between 1a and 11b from above and below.

Then, while rotating the upper rotary circular blade 3a and the lower rotary circular blade 3b, the upper drive unit 4a and the lower drive unit 4b are synchronously moved from one end side to the other end side of the metal strip 21. To move. At this time, the rail pressing device 15 applies pressure so as to withstand the reaction force at the time of cutting and prevent the rail position from shifting. By doing so, the blade tip of the upper rotary circular blade 3a and the blade tip of the lower rotary circular blade 3b simultaneously bite into the metal strip 21, and the metal strip 21 is cut along the width direction.

FIG. 4 is a sectional view showing a state where the upper rotary circular blade 3a and the lower rotary circular blade 3b are cutting a metal strip having a relatively large plate thickness. In this case, the lap margin of the cutting edge of the upper rotary circular blade 3a and the lower rotary circular blade 3b is small.

FIG. 5 is a sectional view showing a state where the upper rotary circular blade 3a and the lower rotary circular blade 3b are cutting a metal strip having a relatively thin plate thickness. In this case, the upper rotary circular blade 3a and the lower rotary circular blade 3b have large lap margins.

The reason why the lapping margin is changed depending on the plate thickness is to prevent the metal strip 21 from escaping by pressing the main body side of the metal strip 21 with the flat portions 3c and 3d provided near the cutting edge. . When cutting the metal strip at a relatively low temperature, it suffices to heat the planned cutting portion with the induction heating devices 13a and 13b and then cut.

A metal band edge treating apparatus according to another embodiment of the present invention will be described with reference to FIGS. In FIG. 6, the upper rotary circular blade 3a and the lower rotary circular blade 3b are replaced with a conical upper pressure lower wheel 31a and a cylindrical lower pressure lower wheel 31b. The end of the metal band 21 is wedge-shaped pressed by the conical upper pressure lower wheel 31a and the cylindrical lower pressure lower wheel 31b that move laterally along the end of the metal band 21. Hot-rolled material in hot rolling such as hot-rolled steel sheet, or finish-rolled hot-rolled steel sheet, cold-rolled steel sheet, surface-treated steel sheet, etc., with shear cut at the end of the metal strip, or in an equivalent shape When it is, you can achieve the intended purpose simply by rolling it down like a wedge.

In FIG. 7, an auxiliary wheel 32 is provided on an upper pressing wheel 13a for pressing the end portion of the metal band 21 in a wedge shape to press down an adjacent portion forming a wedge shape, and the adjacent portion of the wedge shape is thickened. To prevent this. In FIG. 8, the upper rotary circular blade 3a and the lower rotary circular blade 3b are replaced by a cylindrical upper electrode wheel 41.
Instead of a and the lower electrode wheel 41b, the end of the metal strip 21 is heated to facilitate forming into a wedge shape.
In FIG. 9, the upper rotary circular blade 3a is replaced with a grinding wheel 51, and the wedge-shaped boundary portion is ground to finish gently.

FIG. 10 shows a conical upper / lower pressure wheel 31a.
And the cylindrical lower pressure lower wheel 31b and the cylindrical upper electrode wheel 4
1a and the lower electrode wheel 41b are provided side by side. With such a configuration, the end portion of the metal band 21 is
When heated by the upper electrode wheel 41a and the lower electrode wheel 41b that move laterally along the end of the metal strip 21, the conical upper pressure lower wheel 31a and the cylindrical lower pressure lower wheel 31b can be pressed in a wedge shape. Can be molded well.

The present invention is not limited to the above embodiment, but the cylindrical lower pressure lower wheel 31b is replaced by the upper pressure lower wheel 31a.
Similarly to the conical shape, the end portion of the metal band may be pressed down in a wedge shape. In addition to the upper rotary circular blade 3a and the lower rotary circular blade 3b, the upper electrode wheel 41a and the lower electrode wheel 41b are also provided.
And / or a grinding wheel 51 is provided side by side, in which case, each mechanism is individually rolled down, and the induction heating device 13
Those skilled in the art can appropriately achieve the same purpose by not providing a and 13b and by changing the design of the structure of the stand, the lateral movement mechanism and the like.

[0030]

As described above, according to the present invention, the finish rolling mill is not damaged, and the lap mark or the end mark is not generated on the coil, so that the yield can be improved and the productivity can be improved.

[Brief description of drawings]

FIG. 1 is a side view of a metal band edge processing device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view in the rolling direction of the metal band edge processing device of the embodiment of the present invention.

FIG. 3 is a front view of the metal band edge processing device of the embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a state in which a metal strip having a relatively large plate thickness is being cut.

FIG. 5 is a cross-sectional view showing a state in which a metal strip having a relatively thin plate is being cut.

FIG. 6 is a cross-sectional view showing a state where the metal strip is pressed down in a wedge shape.

FIG. 7 is a cross-sectional view showing a state where the metal strip is pressed down in a wedge shape.

FIG. 8 is a cross-sectional view showing a state where the metal strip is being heated.

FIG. 9 is a cross-sectional view showing a state in which a metal band is being polished.

FIG. 10 is an explanatory diagram showing a state in which the metal strip is heated and pressed down in a wedge shape.

[Explanation of symbols]

 1 stand 2a rail 2b rail 3a upper rotary circular blade 3b lower rotary circular blade 4a upper drive device 4b lower drive device 5a rack 5b rack 6a pinion 6b pinion 7a frame 7b frame 8a guide roll 8b guide roll 9a bearing 9b bearing 10a bearing Shaft 10b Rotating shaft 11a Clamp 11b Clamp 12a Hydraulic device 12b Hydraulic device 13a Induction heating device 13b Induction heating device 14 Rail inclining device 15 Rail reduction device 16a Electric motor 16b Electric motor 17a Speed reducer 17b Reducer 31a Upper pressure lower wheel 31b Lower pressure lower wheel Auxiliary wheel 41a Upper electrode wheel 41b Lower electrode wheel 51 Polishing wheel

Front page continued (72) Inventor Mamoru Inaba 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Steel Tube Co., Ltd. (72) Takahiro Kariyasu 1-2-1 Marunouchi, Chiyoda-ku, Tokyo Nihon Steel Pipe Co., Ltd. In-house (72) Inventor Hidemichi Matsuda 1-2-1 Marunouchi, Chiyoda-ku, Tokyo Nihon Steel Tube Co., Ltd.

Claims (4)

[Claims] 1. An apparatus for treating a metal band end portion, which comprises a pair of upper and lower rotating circles having sharp-edged cutting edges configured to be movable in the plate width direction. 2. An apparatus for treating a metal band end portion, comprising a conical pressure reducing wheel configured to be movable in the plate width direction. 3. The metal band edge treatment device according to claim 1, further comprising a metal band heating means. 4. The metal band edge treating apparatus according to claim 1, further comprising a metal band clamp means.