JPH0522332Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention relates to a guide device for hot rolling of steel.
The present invention aims to provide a guide device that can also be used for hot rolling Ti plates.

[Conventional technology]

Various proposals have been made in recent years regarding the manufacturing technology of pure Ti thin sheets, but in general, from an economical point of view, continuous hot rolling using an existing hot strip mill for steel is the preferred method. It has been adopted.

Steel hot rolling mills are usually equipped with vertical rolls for width control, and rolling is performed in the width direction.A plate is guided between the work side roll and drive side roll of these vertical rolls. A guide device is provided for this purpose.

On the other hand, hot-rolled pure Ti plates are weak and
When the pure Ti plate 7 is rolled down by vertical rolls, compressive strain occurs in the width direction and buckling is likely to occur.
As shown in FIG. 3, the rollers are pressed against the guide 1 provided between the vertical rolls 80, 80, causing burn-in flaws.

However, since the guide is indispensable for sheet threading, in order to prevent the above-mentioned seizure, it is necessary to stop rolling with the vertical rolls, which deteriorates width accuracy and causes a decrease in yield. In order to solve this problem, we made the part of the guide device that faces the rolled material a replaceable liner, and replaced it with a liner made of titanium made of wood, phenolic resin, etc. and a material that does not cause seizure. There is a method of rolling.

[Problem that the invention attempts to solve]

However, although the above materials can withstand high temperatures to a certain extent, they cannot withstand continuous use and must be replaced with a new one every time one or several rolls are rolled. On the other hand, water cooling is the most effective means of extending the life of the rolled material, but with the method of injecting cooling water from the outside, water cannot be avoided on the rolled material. Partial supercooling occurs, which becomes a problem.

[Means for solving problems]

Therefore, in the hot rolling guide device of the present invention, the rolled material guide surface side of the device is constructed with a removable liner, and as shown in FIGS. 1a and 1b, the rolled material 7 guide surface of the liner 2 The side surface is formed into an uneven shape,
Another basic feature is that the water passage hole 3 for jetting cooling water to the rolling material 7 guide surface side of the liner 2 is provided at a position lower than the tip of the convex portion 4 on the surface of the liner 2.

[Effect]

The rolled material 7 has convex portions 4 provided on the surface of the liner 2.
At this point, the rolled material 7 comes into contact with the liner 2, and a space 6 is formed between the rolled material 7 and the recess 5 on the surface of the liner 2. If the cooling water is jetted out from the water passage hole 3 provided at a position lower than the tip of the convex part 4 on the surface of the liner 2, it will flow in the space 6 between the rolled material 7 and the concave part 5 on the surface of the liner 2, and the water will flow through the liner 2. Cool 2. Furthermore, the liner 2 also has the function of cooling the liner 2 itself from inside by allowing the cooling water to flow inside the liner 2.

Incidentally, drainage of the cooling water from the recess 5 sandwiched between the two protrusions 4 shown in FIG.

〔Example〕

FIG. 2 shows an embodiment of the hot rolling guide device of the present invention, and 1 shows the vertical roll 8 of the hot rolling mill.
This is the device of this embodiment for guiding the lower surface of a plate provided between 0.0 and 80 mm.

The guide device 1 of this embodiment includes a portion of a pedestal 10 that is long in the rolling material moving direction, and a leg portion 1 that supports the pedestal 10.
It consists of 1 and 11. A rectangular concave fitting part 12 is formed on the side of the rolling material guide surface of the pedestal 10, and a removable liner 20 made of wood, resin, etc. is installed therein.

The liner 20 is formed into a thin plate shape with a central portion of the cross section projecting upward in an arc shape, and when installed in the recessed fitting portion 12, both sides of the liner are fixed thereto by mounting bolts 13. It will be done.

In addition, a plurality of cooling water passage holes 30 are provided on both inclined surfaces of the central portion of the liner 20 that protrudes in an arc shape, and cooling water supply headers 14 provided on both sides of the liner 20 are connected thereto. , 14, and the liner 20 is water-cooled.

That is, if the tip of the arc-shaped portion of the liner 20 comes into contact with and supports the moving rolled material, and if cooling water is spouted from the water passage hole 30 formed in the sloped surface portion, the slope of the liner 20 can be The cooling water flows along the rolling material guide surface side of the liner 20,
will be cooled down. In addition, since the cooling water flows through the water passage holes 30, the liner 20 is cooled from inside.

[Effect of idea]

As detailed above, according to the hot rolling guide device having the configuration of the present invention, even if the guide liner is made of a material that cannot withstand relatively high temperatures, it can be used to continuously roll a large amount of rolled material. It has excellent effects.

It is clear that an excellent cooling state can be obtained by applying the present invention even if the guide device does not require replacement of the guide liner and has an integral structure.

[Brief explanation of the drawing]

Figures 1 a and b are explanatory diagrams showing the basic configuration of the present invention, Figure 2 is a perspective view showing an embodiment of the present invention, and Figure 3 is surface burning when pure Ti material is rolled with vertical rolls. It is an explanatory view showing a flaw generation mechanism. In the figure, 1 is a hot rolling guide device, 2 and 20 are liners, 3 and 30 are water holes, 4 is a convex part, 5 is a concave part, and 6
7 indicates a space, and 7 indicates a rolled material.

Claims (1)

[Scope of utility model registration request] In a hot rolling guide device that guides the bottom surface of a plate installed between vertical rolls, the rolled material guide surface side of the device is configured with a removable liner, and the surface of the liner on the rolled material guide surface side is made uneven. 1. A guide device for hot rolling, characterized in that the guide device is formed into a shape and has a water passage hole for spouting cooling water on the rolling material guide surface side of the liner at a position lower than the tip of the convex portion on the liner surface.