JPS6016405Y2 - Rolling mill draining device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a draining device for a rolling mill, and more particularly to a draining device suitable for a rolling mill where the surface quality of the strip surface after rolling is strictly required.

Conventionally, in cold rolling mills such as tandem cold strip mills, skin pass mills, and double reduction mills,
When manufacturing metal plates such as substrates of various surface-treated steel plates and high-quality steel strips for special purposes, lubricant or coolant (hereinafter referred to as coolant etc.) is sprayed onto the rolls and adheres to the rolls.

) remains attached to the strip after rolling, it has been common practice to provide a wiping device with a wiper for wiping the exit side of the roll along the roll axis.

Furthermore, in order to further reduce the amount of coolant remaining on the surface of the strip after rolling, an air blowing device that blows air onto the surface of the strip at the exit side of the rolling mill is sometimes used in combination.

However, in such conventional draining devices, it is necessary to increase the contact pressure between the roll and the wiper in order to improve the draining effect, but in this case, it is difficult to maintain an average contact pressure in the strip width direction. Therefore, there was a tendency for vertical streaks or uneven gloss in the width direction to occur on the surface of the strip after rolling.

It is quite difficult to adjust and maintain appropriate wiping conditions to prevent these surface defects.

As a result of various experiments and studies, the present inventors have discovered that the wiping effect can be significantly improved by blowing air onto the contact area between the wiper and the roll, and have arrived at the present invention.

An object of the present invention is to provide a draining device for a rolling mill that can uniformly wipe off coolant and the like deposited on the rolls along the width of the strip.

Another object of the present invention is to provide a water draining device for a rolling mill that allows easy adjustment of the contact pressure between the wiper and the rolls, does not require special care, has little wear on the wiper, and is easy to handle. be.

According to the present invention, a rolling mill draining device for wiping away coolant, etc. that has adhered and accumulated on the rolls of a rolling mill is equipped with an air blowing device that blows air to the contact portion between the roll and the wiper in the vicinity of the wiper. A machine draining device is provided.

The present invention will be explained in detail by way of examples below.

FIG. 1 is a sectional view showing an embodiment of the present invention.

The strip 1 is rolled between a pair of work rolls 2, 2 supported by a pair of backup rolls 3.3.

At this time, heat is generated in response to plastic working, which tends to cause flattening and bending of the roll, and also affects the lubrication properties. Therefore, a coolant spray nozzle is installed as shown in the figure, and coolant (generally water, In some cases, the lubricant oil or fat is contained in the form of an emulsion or diluted with an organic solvent.

These are collectively called coolant etc.

) to cool the roll as well as the strip.

Conventionally, in order to prevent this coolant from adhering to the rolled strip, a packet 8 was provided at the end of the movable cobble guard 7, and a wiper 9 was further provided at the tip of the packet 8. The position of the cobble guard 7 was only adjusted by a fluid pressure device with a screw adjustment stopper or the like so that it came into contact with the surface.

In the present invention, in addition to this conventional configuration, the air blow device 10
The feature is that air (compressed air) is injected into the contact area between the work roll surface and the wiper 9.

Further, if a large saucer 15 with a width larger than the width of the wiper is provided below the wiper, it becomes easy to collect the coolant and the like, and complete protection against dripping of the coolant and the like on the strip becomes complete.

In the embodiment, the air blow device 10 is located below the wiper, but as shown in a cross-sectional view in FIG. It is also possible to allow air to escape from between the two.

In the embodiment shown in FIG. 1, the contact pressure of the wiper 9 against the roll 2 is reduced, that is, the wiper 9 is in incomplete contact with the roll 2, and by upward air pressure, the coolant and the like deposited on the work roll 2 to the packet 8 are removed from the strip 1. It does not fall and exhibits sufficient wiping effect.

In the embodiment shown in FIG. 2, the upper wiper 9A is similar to the case shown in FIG. 1, but the gap between the lower wiper 9B and the work roll 2 is smaller than that between the upper wiper 9A and the work roll 2. It seems that the wiping results are better in this case.

Furthermore, when the air spray nozzle 11 is extended as shown by the broken line in Fig. 2 and high pressure air is injected into the upper gap, the air chamber 1
This is effective because back pressure is generated on the second side.

It goes without saying that the present invention is applicable not only to work rolls but also to backup rolls.

Of course, the upper and lower rolls can also be provided.

According to the present invention, there is no possibility that coolant or the like remains attached to the surface of the rolled strip, and vertical streaks or uneven gloss do not occur on the rolled strip as in the conventional method.

Therefore, the present invention is particularly suitable for special thin sheets such as steel strips for shadow masks, which require a clean strip surface after rolling.
It is particularly effective in producing various surface-treated steel sheets and metal plates such as tinplate, tin-free steel, and electrogalvanized steel sheets.

Furthermore, as described above, the positional relationship between the wiper and the roll surface can be easily handled, and the wiper is less likely to wear out.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view of another embodiment. 1... Strip, 2... Work roll, 3. ...Backup roll, 4...
・Coolant spray +, 9.9A, 9B... Wiper, 10... Air blow device, 15...
... saucer.

Claims (3)

[Scope of utility model registration request] (1) A rolling mill draining device for wiping away coolant, etc. that has accumulated on the rolls of a rolling mill, which is equipped with an air blowing device that blows air to the contact area between the roll and the wiper near the wiper. Machine draining device. (2) The draining device according to claim 1, which is a utility model, and includes a saucer provided at the bottom of the wiper. (3) The draining device according to claims 1 and 2, wherein the roll and the wiper are in incomplete contact.