JPH0487713A - High speed cutter provided with fluid header - Google Patents

Abstract

PURPOSE:To prevent flying phenomenum of a following strip by arranging fluid headers to jet out fluid in the strip forwarding direction before and after a cutter in a strip high speed cutter of a hot endless rolling. CONSTITUTION:A high speed cutter 1 is provided with a fluid header 5 serving as an inlet side guide, a fluid header 9 serving as an inlet side apron and a fluid header 6 serving as an outlet side guide, and it can jet or blow out fluid such as water or air from above or below a strip in the strip forwarding direction and can stop it. The fluid headers 5, 6 are installed free to oscillate on a cutter housing 4 with a bracket or others and are oscillated by cylinders 10, 11 installed on the cutter housing 4 through the bracket or others. When a cut part of the strip approaches, fluid such as water or air is jetted or blown out from the fluid headers 5, 6, 9, and after a following strip 7b arrives at a winder through a pinch roller 3, the jet or blowout of the fluid is stopped.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention involves connecting rough rolled steel sheets upstream of a finishing mill, continuously hot finish rolling them, cutting them after rolling, and winding them into coils. The present invention relates to a high-speed cutting machine equipped with a fluid header used for cutting strips in so-called endless rolling.

[Conventional technology 1] Conventional strip hot rolling equipment rolls each slab, which is the rolling material, but as the demand for hot rolled thin steel sheets has increased in recent years, improvements in production efficiency and energy saving have been made. , labor saving is strongly desired.

As a method for this purpose, the terminal end of the leading sheet bar fed from the rough rolling mill group is joined to the leading end of the trailing sheet bar on the upstream side of the finishing rolling mill, and these are continuously passed through the finishing rolling mill. A hot endless rolling method is known.

The sheet bars sent out from the rough rolling mill are conveyed by table rollers, joined by a joining device, and continuously rolled by a finishing mill. The strip rolled by the finishing mill is cooled by a cooling device, then cut and divided by a shearing machine, and wound by a winding machine to form a coiled product.

Regarding high-speed strip cutting machines for endless hot rolling, Japanese Patent Application Laid-Open No. 61-065713 and Japanese Patent Application Laid-Open No. 63-18
A high-speed cutting machine has been proposed in Publication No. 0309 and the like. Although these proposals make it possible to cut a strip running at high speed, they do not mention any countermeasures against the significant deterioration in the threadability of the subsequent strip, especially at the tip of the trailing strip. It is insufficient.

Problem 1 to be solved by the invention C: In other words, after cutting, the leading edge of the trailing strip must pass through a cutting machine and be transported to a winding facility, but in the case of thin material rolling, the cutting speed is about 1000 mpm, and the cutting speed is about 1000 mpm, which is normal for threading. The speed far exceeds 600 mpm, and the flying phenomenon caused by air drag may make it impossible to run. The present invention aims to solve these problems.

[Means for Solving the Problems] The present invention provides a high-speed strip cutting machine for endless hot rolling, characterized in that fluid headers that eject fluid in the strip advancing direction are disposed before and after the cutting machine. The present invention provides a high-speed cutting machine equipped with Further, it is preferable that the fluid header doubles as an inlet/outlet guide and an inlet apron.

[Function] Since the high-speed cutting machine of the present invention is configured as described above, it is possible to effectively suppress flying of the tip of the trailing strip that becomes free after cutting, and facilitates high-speed cutting of thin m-plates. can be done.

The blowout direction of the fluid may be adjusted appropriately so as to guide the strip in a well-balanced manner, and it is preferable that the header be made swingable so that the height and direction of the blowout port can be adjusted.
The flow rate of the fluid may also be determined depending on the actual situation.

[Example] FIG. 1 shows an elevational view of an example of the present invention. In FIG. 1, a high-speed cutting machine 1 according to the present invention is equipped with a fluid ladder 5 that also serves as an entry guide, a fluid ladder 9 that also serves as an entry apron, and a fluid ladder 6 that also serves as an exit guide.

From this fluid header 5.6.9, fluid such as water or air can be ejected or stopped from above and below the strip in the direction in which the strip travels by operating a valve (not shown).

The fluid ladders 5 and 6 are swingably attached to the cutting machine housing 4 with brackets or the like, and the cylinder 10 is attached to the cutting machine housing 4 via a bracket or the like.
．． 11.

Next, the operation of the embodiment will be described.

FIG. 1 shows the state of the high-speed cutting machine 1 immediately after cutting the leading strip 7a and the trailing strip 7b at high speed.

In FIG. 1, the fluid ladder 5 is set at the lower limit (cutting state) where the fluid outlet is closest to the strip;
When the cut part of the strip approaches, add the ladder 5, 6.9 to the fluid.
A fluid such as water or air is jetted out by operating a valve (not shown), and after the trailing strip 7b passes through the pinch roller 3 and reaches a winder (not shown), the jetting of the fluid is stopped.

The outlet of the fluid ladder 5.6.9 has a width approximately equal to the maximum width of the strip, and the velocity of the fluid to be blown out is greater than the traveling speed of the strip.

FIG. 2 shows the condition when the first strip of endless rolling is passed through. Of course, the same applies to normal strips when they are not endlessly rolled.

In FIG. 2, the fluid header 5 is set at the position where the fluid outlet is farthest from the strip, that is, at the upper limit (through-plate state). The cutting machine drum 2 is stopped in such a state that its upper and lower parts can be effectively used as threading guides, and the strip 7 is threaded in this state.

Note that the fluid rudder 6 is normally set at the lower limit during rolling, and is swung and retracted during maintenance.

[Effects of the invention] In endless hot rolling, after the strip is cut by a high-speed cutting machine on the exit side of the finishing rolling mill, it is possible to prevent the flying phenomenon of the leading end of the trailing strip which becomes free, thereby ensuring sheet threadability. This makes it possible to cut at high speed during rolling of thin materials without slowing down. In addition, the threadability of the leading strip during endless rolling is ensured.

[Brief explanation of the drawing]

1 and 2 are schematic side views of embodiments of the present invention, respectively. 1... Cutting machine 2... Cutting machine drum 3...
・Pinch roll 4...Frame 5.6.9...
fluid header

Claims (1)

[Claims] 1. A high-speed cutting machine for strip in endless hot rolling, characterized in that fluid headers that eject fluid in the strip advancing direction are disposed before and after the cutting machine. Machine. 2. The high-speed cutting machine equipped with a fluid header according to claim 1, wherein the fluid header also serves as an entry/exit guide. 3. The high-speed cutting machine equipped with a fluid header according to claim 1 or 2, wherein the fluid header also serves as an entry apron.