JPS59220207A - Skew rolling device of steel material - Google Patents

Abstract

PURPOSE:To prevent the generation of crops at the front and rear ends of a rolling material, in rolling a thick steel plate, by detecting the slant angle of the plate on a rolling line to compare it with a proper slant angle of the plate and rolling it by slanting side-guides by the portion of the difference. CONSTITUTION:In skew rolling a steel plate 10 by installing a reversible mill on the rolling line of plate 10, the positions of plate 10 in its rolling direction and the direction perpendicular to it are detected by a detector 13 and are inputted to a computor 14. On the other hand, a proper slant angle is computed by the computer 14 basing on the rolling reduction, width, length, and material, etc. of the material 10. These both values are displayed in displays 15, 16. The material is rolled after inputting the difference between both values to side- guide driving devices 20, and driving side-guide arms 19a, 19b to move side guides 17 to get a target angle with respect to the rolling line, thereby preventing the material from forming top and end crops.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a rolling device that rolls steel products in an inclined state, in particular, by comparing the actual inclination angle of the steel material and the appropriate inclination angle, and reducing the difference by the difference between the actual inclination angle and the appropriate inclination angle. The present invention relates to an incline rolling device that inclines the rolling mill.

[Technical background of the invention]

Generally, when a thick plate is rolled, its cross-sectional area decreases and it becomes longer in the μ rolling direction, and it also deforms in the width direction, resulting in widening. Since this width widening phenomenon occurs more greatly at the leading and trailing ends of the rolled material, the planar shape of the steel sheet after rolling is no longer rectangular. In particular, the above-mentioned phenomenon mainly occurs at the stage where the plate thickness is thick, at the stage of rolling to form a sheet, and at the time of rolling for width-setting, and the planar shape at the end of rolling is a combination of the changes that occur at each stage.

In addition, as shown in Fig. 1(a), when using the normal rolling method that does not give an angle to the steel material with respect to the rolling direction, the rolling ratio in the width direction (rolling width/slab width) is small and the rolling ratio in the longitudinal direction is small. When the ratio (rolling length/slab length) is large, the top and bottom crops 3.44 become convex as shown in Figure 1(b) at the end of rolling, and the side crops become drum-shaped, while the width increases. If the rolling ratio in the direction is large and the rolling ratio in the longitudinal direction is small, the top and bottom crops will have a concave shape and the side crops will have a drum shape at the end of rolling.

Also, if the steel material is rolled with an inclination (θ) as shown in Fig. 1 (a), it will have a shape as shown in Fig. 2 (b), and as shown in Fig. 3 (,), the steel material will be rolled in the opposite direction. When rolled with an inclination (θ'), a shape as shown in FIG. 3(b) is obtained. Therefore,
In the conventional inclined rolling method, as shown in Fig. V, the steel material is rolled in the manner shown in Fig. 2, then tilted in the opposite direction and rolled again to obtain cropped shapes at the leading and trailing ends. I'm trying to improve it.

Specifically, as shown in Figure 3, the calculator! Calculate the optimal inclination angle of the steel material based on the reduction amount, width, length, material, etc. of the steel material, and input the opening degree value of the side guide B that gives this inclination angle to the automatic positioning device 7, This automatic positioning device 7 operates the side guide driving device t and sets the side guide t to the target position 7. As shown in the figure, the side guide t is positioned at the steel material conveying line center. One arm 1raXlra is vertically projected from a pair of side guide drive devices tXr installed, and a side guide 6 is attached to these arms ra and 1m, and the arms 1rhXIh are always arranged in pairs in a direction perpendicular to the conveyance line 2. It is designed to perform expansion and contraction movements. Therefore, the side guide t is moved in a direction perpendicular to the steel material conveyance liner and set at the target position.

Once the side guide t is installed at the target position, the operator rotates the rotary table and stops the rotary table when the corner of the steel material comes into contact with the side guide t.

[Problems with background technology]

In the conventional inclined rolling method described above, if the steel material is not rectangular and the corner portion of the steel material that contacts the side guide t is deformed, the inclination angle of the steel material may deviate from the target value. Furthermore, the side guide t can only move in a direction perpendicular to the conveying direction of the steel material, resulting in a disadvantage that the shape after rolling becomes poor.

[Purpose of the invention]

The present invention has been made to improve the above-mentioned problems in the conventional inclined rolling, and its purpose is to accurately control the inclination angle of the steel material without being affected by the tip and rear end shapes of the steel material. An object of the present invention is to provide an inclined rolling apparatus for steel materials, which can improve the shape of a cropped portion by detecting this.

[Summary of the invention]

In order to achieve the above object, the steel material inclination rolling apparatus according to the present invention detects the inclination angle of the steel material before rolling with a detector disposed near the rolling mill, and calculates the appropriate angle of the steel material with a computer. The outline of the method is to use special side guides to tilt the steel material by the difference between the calculated value and the detected value.

[Implementation example]

Below, practical examples of the present invention will be discussed based on FIGS. 7 to 1/1.

FIG. 7 is a schematic side view of the inclined rolling apparatus according to the present invention,
The figure is a block diagram of equipment constituting the present invention.

A reversible mill 7.2 is installed on the rolling line II for steel material IQ, and detectors 13.13 are installed before and after this reversible mill 7.2. For example, a hot lump position detector is used as the detector 13, and position detection signals in the direction perpendicular to the rolling direction are inputted at regular intervals in the rolling direction to a total of 1r-4iVt, tri.Based on this signal, the computer/l calculates the steel material 10. Calculate the inclination angle of The calculated inclination angle of the steel 4710 is displayed on the display 75.
The operator can know the inclination angle of the steel material 10 by looking at the display 15.

On the other hand, the computer slag is busy calculating the appropriate inclination angle of the steel material from the reduction amount of the S\Fl material, the width of the steel material, the length of the steel material, the material, etc., and displaying this on the display/6. There is. Thus, the operator can compare the actual inclination angle of the steel material and the target 9i material inclination angle (set inclination angle) using the displays /3 and /A.

Then, the side guide arm/
Calculation of target positions for each of 9m and /9b - Side guide drive device 2.0 is used to move the side guide 17 to the target position.

Here, the drive mechanism of the side guide 17 has a pair of side guide drive devices J1m arranged to face each other along the conveyance direction l/ of the steel material, as shown in FIG. One arm each/9aX/? b is attached so that it can expand and contract in a direction perpendicular to the transport direction 11, and each arm /9a and /9b can be expanded and contracted separately. However, the arm 19b (or tqb) attached to one drive device expands and contracts while maintaining the same length as the arm 19b (or 19a) attached to the other drive device.

Next, the operation of the inclined rolling apparatus according to the present invention will be explained.

First, the steel material IO that has passed through the reversible mill/co is sent to the computer/Hiroshi.
- It stops within the measurement range S of detector/3 by table control. The inclination angle of the copper material /Q is determined using the material position detection signal from the detector /3. This method of finding is the first
Q diagrams (a) to (c) FC are shown.

That is, Fig. 1O (a) is a state diagram in which the detector 13 scans the steel material position at equal intervals in the rolling direction, and (a) to (e) in the figure are the positions scanned to detect the steel material position. be. The steel material position representation number as a result of this scan becomes an 0FF-ON-OFF signal as shown in FIG. 10(b). Here, the ON signal is a signal when the steel material is detected, and 9, OFF
The signal is a steel material undetected state signal.

Of these scan signals, only the scan data in which the time width of the ON signal is approximately equal to the time width of the adjacent ON signal (T-1←), Hl) is used as valid data for determining the steel inclination angle. Use as °.

Then, a distance * (scan scanning speed x
The time width) was set to 11 to 15, respectively, and the steel material detection at each scan point was set to 11 to 15, respectively. J) If the distance corresponding to the time width of the ON signal state is ml to m5, in Figure 1O, m2
, m5. Since mq is approximately the same value, (b) and (c)
12, m, 111 and m2, m5, of each signal of
mq and the adjacent scan interval n cannot be used, and the slope of the steel material is θ as shown in Figure 1O(C). Then, 15-12
He-ha 1II-z2jan on÷□÷□
It can be easily determined from the formula 〒 □ n n m2n.

It can also be obtained from the formula.

Furthermore, to obtain the average value of the value obtained from the OFF→ON change point of one steel position detection signal and the value obtained from the ON→OFF change point, it is obtained from the following formula.

Then, the target steel inclination angle θm and side guide opening degree ω
Give m (a value with a little margin in the normal steel material) to the side guide positioning device/g. Then, the side guide positioning device itr moves the side guide arms /qa, /qb
and set the side guides /7 and /7 at predetermined positions through the side guide drive device 20. Thus, the steel member 10 narrowed by the side guides 17.17 has the same inclination angle as the inclination angle of the side guides/7.17. After completing the setting of the side guide /7, /7 (after the steel material is supported at the predetermined angle of inclination), set the side guide /7. /
7 is normally opened until it opens so as not to interfere with the conveyance of the steel material IO.

In addition, Fig. ii shows how to find the contact point position between the side guides 17, /7 and the side guide drive arm /qaX/9b, where the inclination angle θm1 the side guide opening degree ωm
1. If the distance between the left and right arms is am, then the distance between the center points of the upper and lower side guides 17.17 is ωnB/'asθ, and the distance from the conveyance line center to the center point of each side guide is ω shim. , θ. In addition, the contact point between the arm and the side guide is located at a position shifted by -"-tan θ from the center point of the side guide when viewed from the inside center of the conveyor. In other words, in Figure 1/Fig. λ, the center of the lower side guide Assuming that point C1 is the point of contact with the left arm and A1 is the point of contact with the right arm, and B is the point of contact with the right arm, the distance of each point from the center of the conveyance line is determined as follows.

A! −−−−−−・tanθ ko eos e koB S −+−・tanθ koCOSθ It's not something you can do. For example, although a steel position detector is used as a detector, the present invention is not particularly limited to this, and any device that can detect the angle of inclination of the steel may be used, and an indicator is not necessarily required.

Additionally, a steel position detector, target tilt angle indicator and current (
(Actually) Using the tilt angle indicator, the operator manually operates the rotary tape while checking the current tilt angle and the target tilt angle, so that the steel material can be moved to the specified angle without using side guides. It may be tilted up to K.

〔Effect of the invention〕

As explained above, according to the present invention, a detector for detecting the inclination angle of the steel material is provided on the rolling line, the appropriate inclination angle of the steel material is calculated by a computer, and this calculated value is added to the inclination angle of the steel material. Since the steel material is tilted so that the angle of inclination of the steel material matches the fi Since it can be automatically tilted, the shape of the cropped portion in inclined rolling can be improved, and many effects such as a smaller portion to be cut off as a crop and an improved rolling yield can be achieved.

[Brief explanation of drawings]

Figure 1 (-) is a side view showing a general one-work rolling method, Figure 1 (b) is a diagram showing the planar shape of fM# after rolling by the rolling method shown in Figure 1 (,), Figure 2 (a) and Figure 3 (, ) are side views showing the inclined rolling method;
b) and FIG. 3(b) are diagrams showing the planar shape of the steel material after being rolled by the above-mentioned inclined rolling device, and FIG. 1 is a combination of the inclined rolling methods of FIG. 2(,) and FIG. 3(a). FIG. 5 is a block diagram of a conventional strip tilt positioning system, FIG. Figure 70 is a block diagram of the inclined rolling machine, Figure 7 is a plan view of the side guide applied to the inclined rolling machine, and Figures 70 (a) to 70 (,) show the steel position detection signals and FIG. 11 is a diagram illustrating the principle of how to determine the inclination of the material, and is a diagram explaining the method of determining the side guide drive arm position from the inclination angle and the side guide opening degree. 10... Steel material, 13... Detector, /4C... Computer, 17... Side guide, /I... Side guide positioning device, /? a. /? b...Side guide drive arm, 20...Side guide drive device, θn...Inclination angle of steel material, θm・
・Appropriate inclination angle. Applicant's agent Inomata Kiyoshi 6 Figure R Kake 7 Figure B8 Part 1 B 9 Amendment to figure procedure (formality) September Y, 1978 Commissioner of the Patent Office Kazuo Wakasugi Tono 1, Indication of the case 1988 Patent r "Application No. 96043 2, Title of invention: Incline rolling device for steel materials 3, Person making amendments Related to the case Patent applicant (307) Tokyo Shibaura Electric Co., Ltd. Showa Kaku August 10, 1999 Specification and drawings 8, The detailed statement of contents of the amendment and the drawings will be reprinted as attached (no changes to the contents).

Claims (1)

[Claims] Detects the inclination angle of the steel material before rolling (inclination angle detectors installed near the rolling mill, and a calculator that calculates the appropriate inclination angle from the reduction amount of the steel material, the width of the steel material, the length of the steel material, the material quality, etc.) and a side guide that tilts the steel material according to the difference between the value calculated by the computer and the value detected by the inclination angle detector.