JPH0433713A - Stripper guide for hot rolling mill - Google Patents

Abstract

PURPOSE:To improve a roll cooling effect by bringing the top of the stripper guide near to a bite part after passing through the roll by changing arbitrarily the contact position of the top end of the stripper guide to a working roll. CONSTITUTION:The contact position of the top of the stripper with the working rolls 1, 3 is made so as to be changed arbitrarily, the tops of the stripper guides 4, 5 are separated until the passing through the roll and after the sheet passes, the top of the stripper guide is made so as to approach to the biting part. Accordingly, no trouble of passing through the roll at the time of introducing the top of the products 1 is generated to roll cooling effect is improved and the generation of the rough surface of the roll can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a stripper guide for a hot rolling mill.

<Prior art> A stripper guide is installed before and after the finishing mill of a hot rolling facility to pass the product through (see 3rd edition Steel Handbook III (+JP, 375). is cooled by water, but in order to prevent the cooling water from splashing onto the product, the tip of the side guide comes into contact with the work roll and wipes off the roll cooling water. It has a guiding function and a wiper function to cut off the roll cooling water.

However, as a product guiding function, in order to stably guide the strip without hitting the stringer guide, the contact position between the work roll and the stripper guide should be as close as possible to the pass line. On the other hand, from the viewpoint of the roll cooling function, there is a contradictory result in that the cooling effect is improved if the contact position is brought as close as possible to the hide part where the upper and lower rolls are rolling the product.

In reality, the contact position between the work roll and the stripper guide is set at a position that does not cause any problem for the product to pass through, and the roll cooling effect is currently sacrificed. .

<Problems to be Solved by the Invention> As mentioned above, although the conventional stripper guide has a sufficient product guiding function, the cooling effect of the work roll cannot be said to be sufficient.

In view of the current situation, the present invention has been made to provide a stripper guide that can move the stripper guide and bring the tip of the stripper guide closer to the cutting part after passing the product, thereby improving the roll cooling effect. It is something.

<Means for Solving the Problems> The present invention provides a stripper guide for a hot rolling mill.
This is a stripper guide for a hot rolling mill that allows you to arbitrarily change the contact position of the tip of the stripper guide with the work roll.

<Function> Product guidance and threading become a problem until the tip of the product passes the stripper guide and the looper between the stands stabilizes.After threading is completed, the tip of the stripper guide becomes a problem. There is no problem in rolling even if the steel sheet is brought close to the hide part.

Therefore, when threading, keep the contact position of the stripper guide away from the hide part, and after threading is complete, move this contact position closer to the hide part to bring the start point of roll cooling closer to the hide part to increase the roll cooling effect. be able to.

In the present invention, the contact position of the tip of the stripper with the work roll can be changed arbitrarily, the tip of the stripper guide is kept away from the hide part until the product passes, and the tip of the stripper guide 1' Since the roller can be brought close to the cutting part, there is no problem with threading when guiding the tip of the product, and the roll cooling effect is improved and roll roughness can be reduced.

<Embodiment> FIG. 1(a) shows a conventional arrangement of the stringer guide, and FIG. 1(b) shows a state in which the stringer guide is brought close to the hide part. As shown in the figure, according to the present invention, an upper stripper guide 4 and a lower stripper guide F5 are provided.
By leaving the tip of the stripper guide close to the hide part as shown in Fig. 1(b), the point where the cooling water from Der 6.7 hits the work roll is a point on the upper work roll. Moved from point to point b, and from point 0 to point d on the lower work roll.

In other words, if the stripper guide is fixed as in the past, the cooling start points of the upper and lower work rolls are at angles θ1 and α from the bite section, respectively. The cooling start point is at an angle of θ2 and α2 from the bite part, and it is clearly θ2.
〈θ8, α2〈α1.

By bringing the cooling start point of the work roll closer to the bite part in this way, it is possible to increase the effect of removing heat from the roll and to lower the temperature of the roll.

Figure 2 shows an example of equipment that changes the contact position of the stripper guide tip with the work roll.

Upper stripper guide 4 and lower stripper guy F 5
The frame 8 is fitted onto a frame 8, and the frame 8 is configured to slide on a slide bar 9 using a hydraulic cylinder 10. Conventionally, the hydraulic cylinder moves at the forward limit and backward limit at the stroke end, but in the present invention, the forward stop position is determined according to the diameter of the roll. For this reason, the hydraulic cylinder 0 is equipped with a stroke sensor, and the point of contact between the tip of the stripper guide and the two-crawl can be changed arbitrarily. Note that the hydraulic cylinder does not need to be equipped with a sensor as long as the amount of movement of the hydraulic cylinder can be detected by a sensor or the like.

Therefore, by setting the stopping position of the hydraulic cylinder during and after threading and stopping the cylinder at a predetermined stroke position, it is possible to adjust the degree of approach of the stripper guide to the hide part.

<Effects of the Invention> The present invention makes the stripper guide movable, so
There are no problems with threading, such as problems with bumps when guiding the tip of the product, and the stripper guide can now be moved closer to the tooling part after threading, which improves the roll cooling effect and improves roll cooling. I was able to reduce skin irritation.

[Brief explanation of drawings]

FIG. 1 is a drawing showing the movement status of the stripper guide according to the present invention, (a) is during sheet passing, ■) is a cross-sectional explanatory diagram showing the position of the stripper guide after sheet passing, and the second drawing is: FIG. 1 is an overall explanatory diagram of a stripper guide according to the present invention. l...product, 2...upper work roll, 3...lower work roll, 4...upper stripper guide, 5...lower stripper guide, 6...upper work roll cooling header, 7...Lower work roll cooling hengoo, 8...Frame, 9...Slide bar, 10...Hydraulic cylinder, 11...Upper hack unbroll, 12...Lower bank anno roll, I3 ...Upper work roll coolant henotar, 14.
・Lower work roll coolant hender. Patent applicant Kawasaki Steel Corporation Yari l Figure (σ) Cb)

Claims (1)

[Claims] A stripper guide for a hot rolling mill in which the contact position of the tip of the stripper guide with a work roll can be arbitrarily changed.