JPH0780088B2 - High speed cutting machine with fluid header - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a method in which roughly rolled steel sheets are connected on the upstream side of a finish rolling mill for continuous hot finish rolling, and after rolling, cut and wound into a coil. 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]

In conventional strip hot rolling equipment, rolling was performed for each slab, which is a rolling material, but with the recent increase in demand for hot-rolled sheet steel, improvement in production efficiency, energy saving, and labor saving are strongly required. Is desired. As a method for this, on the upstream side of the finish rolling mill, the end portion of the preceding sheet bar and the tip portion of the following sheet bar sent from the rough rolling mill group are joined, and this is continuously applied by the finish rolling mill. A hot endless rolling method for rolling is known.

The sheet bar sent out from the rough rolling mill is conveyed by a table roller, joined by a joining device, and continuously rolled by a finish rolling mill. The strip rolled by the finish rolling mill is cooled by a cooling device, cut and divided by a shearing device, and wound by a winder to form a coiled product.

As a strip high-speed cutting machine for hot endless rolling, high-speed cutting machines have been proposed in Japanese Patent Laid-Open Nos. 61-065713 and 63-180309. Although these proposals make it possible to cut strips running at high speeds, they do not mention measures to be taken to significantly deteriorate the threadability of the trailing strips, especially the trailing strips. Not enough.

[Problems to be Solved by the Invention]

That is, the leading end of the trailing strip must pass through the cutting machine after cutting and be transported to the winding equipment, but in the case of thin rolling, the cutting speed is about 1000 mpm and the normal striping speed is 600 mp.
It is far beyond m, and it may become impossible to run due to the flying phenomenon caused by the drag of air. Further, there is a problem that the first strip tip at the endless rolling or the strip tip of the normal batch type rolling at the time of not performing the endless rolling causes a catch at the portion of the cutting machine. The present invention aims to solve such problems.

[Means for Solving the Problems]

The present invention is characterized in that, in a strip high-speed cutting machine in hot endless rolling, fluid headers for ejecting a fluid in the strip advancing direction are arranged before and after the cutting machine, and the granular header also serves as an inlet / outlet side guide of the cutting machine. The present invention provides a high-speed cutting machine including a fluid header. Further, it is preferable that the fluid header also serves as the inlet side apron.

[Action]

Since the high-speed cutting machine of the present invention is configured as described above, it is possible to effectively suppress the flying of the tip of the trailing strip that has become free after cutting, and to easily perform high-speed cutting of thin steel sheets. it can.

The direction in which the fluid is blown out may be appropriately determined so as to guide the strip in a well-balanced manner, and it is preferable that the header can be swung so that the height and direction of the blowout port can be adjusted.
The flow rate of the fluid may be determined according to the actual situation.

〔Example〕

FIG. 1 shows an elevation view of an embodiment of the present invention. In FIG. 1, the high speed cutting machine 1 according to the present invention is provided with a fluid header 5 also serving as an inlet side guide, a fluid header 9 also serving as an inlet side apron, and a fluid header 6 also serving as an outlet side guide.
From the fluid headers 5, 6 and 9, a fluid such as water or air can be jetted or stopped from above and below the strip by operating a valve (not shown) in the strip advancing direction.

The fluid headers 5, 6 are swingably attached to the cutter housing 4 by a bracket or the like, and the cylinders 10, 1 are attached to the cutter housing 4 via brackets or the like.
Swung by 1.

Next, the operation of the embodiment will be described.

FIG. 1 shows the state of the high speed cutting machine 1 immediately after the high speed cutting of the preceding strip 7a and the following strip 7b.

In FIG. 1, the fluid header 5 is set at the lower limit (disconnected state) where the fluid outlet is closest to the strip,
Fluid headers 5, 6, 9 when strip cuts approach
Then, a fluid such as water or air is jetted by operating a valve (not shown), and the jetting of the fluid is stopped after the trailing strip 7b reaches the winder (not shown) via the pinch roller 3.

The outlets of the fluid headers 5, 6 and 9 have a width substantially equal to the maximum width of the strip, and the jetting speed of the jetting fluid is equal to or higher than the traveling speed of the strip.

FIG. 2 shows the state when the first strip of the endless rolling passes through the strip. Of course, the same is true for a normal strip without endless rolling.

In FIG. 2, the fluid header 5 is set at a position where the fluid outlet is farthest from the strip, that is, at the upper limit (passing state). The upper and lower parts of the cutting machine drum 2 are partially stopped so that they can be effectively used as a sheet passing guide, and the strip 7 is passed through in this state.

The fluid header 6 is normally set to the lower limit during rolling and is swung and retracted during maintenance.

〔The invention's effect〕

In hot endless rolling, after the strip is cut by the high-speed cutting machine on the exit side of the finishing rolling machine, the flying phenomenon at the end of the trailing strip that becomes free can be prevented, and stripability is ensured, so thin sheet rolling is performed. High speed cutting is possible without deceleration. Further, the sheet passing property at the time of passing the leading strip of endless rolling is secured.

[Brief description of drawings]

1 and 2 are schematic side views of an embodiment of the present invention. 1 ... Cutting machine, 2 ... Cutting machine drum 3 ... Pinch roll, 4 ... Frame 5,6,9 ... Fluid header 7 ... (7a, 7b) ... Strip

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Fujio Aoki 1 Kawasaki-cho, Chiba-shi, Chiba Kawasaki Steel Co., Ltd. Chiba Works (56) References JP 61-65713 (JP, A) Actual development Sho 58- 83346 (JP, U)

Claims (1)

[Claims] 1. In a high-speed cutting machine for strip in hot endless rolling, fluid headers for ejecting fluid in the strip advancing direction are arranged in front of and behind the cutting machine, and the fluid header also serves as an inlet / outlet guide of the cutting machine. A high-speed cutting machine equipped with a fluid header.