JP2000005820A - High speed hot stripping machine - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To suppress the effects of hot strip flying and waves on a hot run table roller at the exit side of a hot finishing rolling mill, and to be able to cope with strip width fluctuation, and at the same time. Provided is a high-speed threading device that enables smooth measurement operation in a measurement zone. SOLUTION: A guide mechanism including a string-shaped guide body 15 such as a traveling wire is installed on a hot run table,
The strip is sandwiched between the transport table and the string-shaped guide body, so that the strip can be transported stably from the exit side of the finishing mill to the entrance side of the winding machine, and the width of the wire guide mechanism is adjusted according to the width of the strip. In addition to being adjustable, in the measurement zone on the exit side of the hot finishing mill and the entrance side of the winding machine as required, the string-shaped guide body is divided independently from other parts, and various measuring instruments In order not to hinder the measurement field of view and the measurement operation, the string-shaped guides can be independently moved in the strip width direction with the position or movement of the measuring instrument.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-speed and stable transport of a hot strip from the exit side of a finishing mill to the entrance side of a wind-up machine. TECHNICAL FIELD The present invention relates to a high-speed sheet passing device that does not hinder the measurement operation.

[0002]

2. Description of the Related Art In recent years, from the viewpoints of thinning hot-rolled steel sheets and saving energy, the necessity of high-speed passing of thin strips has been increasing more and more. The high-speed threading at the tip of the hot-rolled material through the winding machine through the
Very important. At the time of high-speed threading, the tip of the rolled material is
It tends to cause flying and waving phenomena, adversely affecting stable transport and winding operations. Such a flying phenomenon is caused by the fact that a sufficient restraining force is not applied to an end portion of a thin strip.

The present inventors have conducted various experiments and studies on means for effectively suppressing the flying and waving phenomenon at the end of the strip and carrying out high-speed conveyance when the thin strip is conveyed in the cooling zone. A guide mechanism consisting of a string-shaped guide body was developed and filed earlier (Japanese Patent Application No. 10-85309). This technique is used on a transfer table or apron between the outlet side of the hot finishing mill and the inlet side of the winder, from 130% to 7% of the strip speed.
At least one or more, preferably two, string-like guide bodies moving at a speed of 0% are arranged on the table path line,
The content is to stably transport the strip from the exit side of the finishing mill to the entrance side of the winding machine by sandwiching the strip between the transport table or the apron and the string-shaped guide body, and has obtained almost the expected effect. .

[0004]

However, the present inventors have further studied the present technology to apply it to actual operation, and have found the following problems. In other words, the string-shaped guides provided on the table path line are fixed, but the width of the thin strip actually rolled is 7 mm.
The range is from 00 mm to 1500 mm, and if the width is adjusted to the minimum width, it is considered that it is difficult to guide the maximum width in a suitable state.

On the other hand, apart from the adaptation to the strip width, various measuring instruments (thickness gauge, sheet shape gauge, sheet width gauge) in special zones, especially in the measurement zones on the exit side of the finishing mill and the entrance side of the winding machine. Etc.) and the position of the string-shaped guide body,
The effect on measurement work is a problem. That is, there is a risk that the string-shaped guide body may interfere with the installation position of these measuring instruments or the scanning movement of the measuring instruments or create a measurement dead zone, and measures for these are also important in actual operation.

[0006] The present invention has been made in view of the above points, and particularly, in the conveyance of a hot thin strip,
A high-speed sheet passing apparatus that can quickly and surely respond to a variation in the width of a strip while suppressing the flying and waving phenomenon of the strip, and does not hinder any measurement work in a measurement zone. The purpose is to provide.

[0007]

According to a first aspect of the present invention, there is provided a high-speed hot strip rolling apparatus for a hot strip mill, comprising: a conveying table or an apron between an exit side of a hot finishing mill and an entrance side of a winding machine; At least two string-shaped guides that move substantially in synchronization with the strip are provided, and the strip is sandwiched between the transport table or the apron and the string-shaped guide,
While being stably conveyed from the exit side of the finishing mill to the entrance side of the winding machine, the string-shaped guide body is disposed to face the line drive side and the work side, and both are connected singly or in the strip width direction. It is characterized by being movable.

It is desirable that the moving speed of the string-shaped guide body can be moved substantially in synchronization with the strip running speed.
If the speed is 0%, there is no problem in performing the function of the string-shaped guide body. Further, it is preferable that the distance between the table roller and the wire is in the range of 100 mm above the pass line to the passing plate thickness + 1 mm in order to stably guide the end of the strip. Further, in the above-described sheet passing device, it is preferable that only the leading end portion or both the leading and trailing end portions of the front and rear end portions of the strip that becomes the tensionless passing plate be guided and transported by the string-shaped guide body.

According to a second aspect of the present invention, in the first aspect, in the measurement zone on the exit side and the winding machine entrance side of the hot finishing mill, the string-shaped guide body is independent of other portions. It is characterized in that the string-shaped guide body can be independently moved in the strip width direction with the position or movement of the measuring instrument so as not to disturb the measurement field of view and the measuring operation of various measuring instruments. .

Further, according to claim 3 of the present invention, in the above-mentioned claim 1 or 2, the two opposing cord-like guide bodies are
It is held by the winding / supplying mechanism so as to be movable along the strip traveling direction in a certain section, and is connected to the width direction control mechanism so as to move in conjunction with the strip width direction or independently. It is characterized by.

In the present invention, since the string-like guide body which is a main part of the threading guide mechanism is intended for a hot-rolled hot strip, a wire made of a stranded stainless steel wire is preferable. A metal wire or a metal strip may be used, and a string-shaped body of another material may be used as long as it has heat resistance and weight.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall side view showing an embodiment in which a high-speed threading device according to the present invention is applied to the rear surface of a hot rolling finishing mill, and FIG. 2 is a plan view thereof. The hot-rolled material (strip) 2 which has been rolled out of the final stand 1 by the hot rolling finishing mill first enters a hot run table 3 in which a number of table rollers 3a are arranged, and a laminar cooling header 4 is disposed above the cooling plate. Cooled to a certain temperature in the belt,
Take-up device 7 via guide roll 5 and pinch roll 6
And the coil 2a is wound. In addition, the last stand 1
On the exit side of the X-ray plate thickness meter 8, plate shape meter 9, plate width meter 10
The thickness, shape (profile), width, and the like of the strip 2 are appropriately detected, and a width gauge 10 is also arranged on the entry side of the winding device 7. In addition, 8p, 9p, and 10p in FIG. 2 indicate a thickness gauge measurement point, a plate shape detection device measurement point, and a width gauge measurement point, respectively.

In this embodiment, on the upper surface of the hot run table in the range from the exit side of the final stand 1 of the finishing mill to the entrance side of the winding device 7, the threading plate divided into a plurality of sections along the strip traveling direction. A guide mechanism is arranged. For example, in the measurement zone from the exit side of the final stand 1 to the cooling zone in which the laminar cooling header 4 is arranged, for convenience of measurement, the passing plate guide mechanism is divided into three sections 11, 12, and 13, and an arbitrary number of subsequent cooling zones are provided. Is divided into sections. The method of division is determined in consideration of the length of one section, interaction with other devices, and the like.

As shown in FIG. 3, the passing plate guide mechanism per section comprises two drums 14a and 14b arranged at intervals along the upstream side and the downstream side of the strip running line, and is provided with a wire or the like. String-shaped guide body 15 (in the example shown, a steel wire is used, so hereinafter simply referred to as a wire)
Is wound on one drum and unwound on the other drum, and is stretched with a plurality of lower sheaves 16. The strip is disposed so as to face the side, and at least the leading end (or the leading end and the trailing end) of the strip is run between the table roller and the wire in accordance with the progress of the strip. Even if a flying or waving phenomenon occurs at the leading end of the strip, the wires on both sides suppress it and achieve a stable high-speed running of the leading end. If the wire 15 is long, it is preferable to provide an intermediate guide reel 17 as necessary.
Then, it is possible to prevent interference of the wire passage route in the same sheave. As the leading end of the strip travels, the wire 15 in each successive section starts moving by driving the drum, and guides the strip without interruption. The driving of the drums 14a, 14b is appropriately reversible. When the operation of guiding the strip is completed, the drum is immediately rewound and returned to the original state.

In the present invention, the position at which the anti-flying wire is stretched can be adjusted in the strip width direction so as to cope with a change in the width of the strip or not to hinder the measurement operation of various measuring instruments. . Therefore, an arithmetic and control unit that inputs the strip width or the position and operation information of the measuring instrument should set an optimal guide width corresponding thereto, or move only one guide mechanism appropriately in the width direction. is necessary. FIGS. 4 and 5 show examples of such a wire adjustment mechanism.

First, FIG. 4 shows a specific example of the width adjusting mechanism of the opposed wire 15. FIG. 4 is a view seen from the cross-sectional direction of the strip 2. The upper surface of both edges of the strip 2 on the table roller 3 a is fed from a winding (or rewinding) drum 14 and guided by a lower sheave 16. A pair of drums 14 on which a guide wire 15 is disposed and opposed in the strip width direction are composed of a spline boss 19 fixed on a guide body frame 18 installed so as to straddle the strip running line and a spline shaft 20 inserted into the spline boss 19.
a and 20b. The boss 19 is located at the center between the two drums, and has a spline shaft 20a,
20b penetrates through the respective drums 14, but one end of one spline shaft 20a is connected to the output shaft 22 of the wire feed / rewind drive motor 21, and the driving force is increased by the drive of the motor 21. The power is transmitted to the right drum 14 through the output shaft 22 and the spline shaft 20a, and further transmitted to the left drum through the spline shaft 20a, the boss 19, and the spline shaft 20b.

The bearings of the two drums 14 are fixed to nut blocks 23a and 23b, respectively, and the nut blocks 23a and 23b are engaged with one screw 24 arranged along the frame 18, and Left and right reverse screws are engraved on the screw 24, and the screw block 24 is rotated forward and reverse by the operation of the width adjusting motor 25, so that the nut blocks 23 a and 23 b expand and contract a mutual distance. Adjust the spacing of Accordingly, the width of the opposed wire 15 is also adjusted, so that the wire 15 can always be arranged at a predetermined position on the edge of the strip 2 even if the width of the strip is changed.

The width adjusting mechanism shown in FIG. 4 is of a type in which the opposed wires 15 are simultaneously moved equally by one motor 25 to adjust the distance between them, and is suitable for changing the strip width. Yes, for example, it is used as a wire adjustment mechanism in a cooling zone or the like. However, in the measurement zones 11 to 13 on the exit side of the final stand 1 of the finishing mill, it is desirable that the opposing wires 15 can be independently moved in the width direction. . This single drive type will be described with reference to FIG.

In the example shown in FIG. 5, the same reference numerals as those in FIG. 4 denote the same members, and a description thereof will be omitted. In this example, each of the blocks 26a and 26b is mounted horizontally facing the main body frame 18 so that the blocks 26a and 26b integrated with the drum 14 and the wire 15 can be independently moved. For example, it is characterized in that it is fixed to the tip of a cylinder rod of a hydraulic cylinder 27a, 27b with a position control function (has a function of setting a width direction wire position according to a position command). In this type, the opposing wires 15 can be individually moved in the width direction, but, of course, the opposing wires 15 can be simultaneously moved by the same amount as in FIG. Further, as the driving mechanism, other appropriate mechanical means, electric means, or the like may be used in addition to the hydraulic cylinder.

Next, various measuring instruments and wires 15 arranged in the measuring zone on the exit side of the final stand 1 of the finishing mill are described.
Will be described. As the thickness gauge 8 installed in the measurement zones 11 and 12 of FIGS. 1 and 2, for example, an X-ray thickness gauge is often used, but when measuring the thickness, the thickness at the center of the strip is measured ( There is a case where the crown is measured by traversing the entire width (a thickness gauge in the measurement zone 11). Measurement zone 1
In No. 1, the wire 15 and the thickness gauge 8 do not particularly interfere with each other, but when the crown is measured in the measurement zone 12, the thickness gauge moves in the width direction, so that if the wire 15 is present, that portion becomes a dead zone. Therefore, if the wire is retracted to the side before traversing or the thickness gauge is moved in the width direction from one end of the strip and measured, the thickness gauge is temporarily stopped when the wire position is reached. Then, if the wire is shifted a small distance in the direction measured by the thickness gauge and the thickness gauge is moved again, the crown can be measured without a dead zone. The hydraulic cylinder 27a or 27b may be used for this shift. As soon as the gauge is moved, return the wire to its original position.

As the plate shape meter 9, for example, laser distance meters arranged at approximately five locations in the plate width direction are used, and the strip shape is measured from the difference in the measured distances. The laser rangefinders at about five places are set at predetermined fixed positions according to the plate width. If the arrangement position of these shape meters 9 and the wire 15 overlap, the site becomes a dead zone,
It is sufficient that the point at which the wire 15 is stopped (set) is always located between the fixed position shape meters.

For example, the strip width meter 10 in the measurement zone 12 irradiates the edge of the strip with a fluorescent lamp from below, captures an image of the strip with a camera, and performs a binarization process (a bright fluorescent place or a dark place). The board width may be calculated by recognizing the board as an edge. Therefore, the wire 15
Must always be located inside the plate width. The board width is recognized as meandering of the board when data is missing,
This is insufficient as full length guarantee data.

At the time of actual operation, the position of each measuring instrument in each measuring zone is determined based on information (plate width, speed, etc.) obtained in advance, and the initial setting position of the wire is determined. When the strip is inserted into the device, the measuring device is stopped and the wire is shifted each time, and all these operations can be automatically controlled by the control device.

As described above, since the threading guide device according to the present invention can be appropriately adjusted in the strip width direction, it can be retracted from the strip running line. For example, a material having a large thickness (4 mm or more) can pass therethrough. If you do
Since it is thick and the transport speed is relatively slow, flying phenomena and the like are unlikely to occur, and since there is no need to guide the wire, the guide passing plate device is retracted so that it can be guided only by the table roll. Rolling operation range can be expanded. In addition, when the passing plate guide device is adjusted in the strip width direction, if the passing plate guide device can be adjusted in the height direction, it is convenient at the time of evacuation from the traveling line and the optimum height from the pass line. Can keep the wire in position. This adjustment of the height position is achieved by raising and lowering the main body frame 18 holding the passing plate guide device over a certain range by an appropriate mechanism.

Further, when the strip stops on the table roller due to a drawing accident or the like in the finishing mill, it is possible to secure the space for removing the defective strip by lifting the threading guide device itself including the wire in the line direction. Thus, it is desirable to provide a turning function. FIG. 6 shows a specific example of this turning mechanism, which turns a passing plate guide mechanism in one section including two opposing wires 15, supply / rewind drums 14a and 14b, and a lower sheave 16. Therefore, a hinge mechanism 29 is provided on one end side of the frame body 28 holding the front and rear lower sheaves 16. The defective strip 2 'can be easily removed by lifting the frame 28 in the direction of the upward arrow about the hinge mechanism 29.

FIG. 7 illustrates a mechanism for preventing the winding of the wire in the high-speed sheet passing apparatus according to the present invention.
Immediately before the wire winding drum 14, a wire guide device 32 including a pair of small-diameter vertical rolls 30 and a pair of horizontal rolls 31 is disposed, and the wire guide device 32 is movable in the drum axial direction. . The wire 15 is wound between the rolls of the wire guide device 32 and wound on the drum 14. Therefore, the wire guide device 32 moves following the movement of the wire 15 wound on the drum 14, whereby the wire is smoothly moved without any winding disturbance and without any angle at the drum end surface. It is wound up.

[0027]

As described in detail above, the high-speed sheet passing apparatus using the guide mechanism according to the present invention effectively suppresses the flying phenomenon and the waving phenomenon of the hot-rolled material, and the high-speed running of the strip after hot rolling. And the threading can be performed stably, the tip of the strip can be smoothly bitten into the winding device, and the guide mechanism can be adjusted in the strip width direction. It is possible to always guide the strip end in an optimal state. In addition, in particular, according to the guide mechanism according to the second aspect of the present invention, in the measurement zone, the above-mentioned stable guide function is exhibited, without interfering with the arrangement of various measuring instruments, and for measuring operation. Without any influence, a smooth and high-precision measuring operation can be performed.

[Brief description of the drawings]

FIG. 1 is a side view of an overall arrangement showing an example of a high-speed sheet passing device according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a diagram schematically illustrating an outline of a passing plate guide mechanism that is a main part of the present invention.

FIG. 4 is an explanatory view showing a specific example of a width adjustment control mechanism of the threading device of the present invention.

FIG. 5 is an explanatory view showing another example of the width adjustment control mechanism of the threading device of the present invention.

FIG. 6 is an explanatory view showing a specific example of a turning mechanism of the threading device of the present invention.

FIG. 7 is an explanatory diagram of a wire winding disturbance prevention mechanism according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Final stand of hot finish rolling mill 2 Strip 2a Strip coil 3 Hot run table 4 Laminar cooling header 5 Winder front guide roll 6 Winder pinch roll 7 Winding device 8 X-ray plate thickness gauge 9 Plate shape gauge 10 Plate width gauge 11 to 13 Separated measurement zone 14 Wire feeding / winding drum 15 Guide wire 16 Lower sheave 17 Intermediate guide reel 18 Guide body frame 19 Spline boss 20a, 20b Spline shaft 21 Wire feeding / rewinding drive motor 22 Output shaft 23a, 23b Nut block 24 Screw 25 Width adjustment drive motor 26a, 26b Moving block 27a, 27b Hydraulic cylinder with position control function 28 Frame 29 Hinge mechanism 32 Wire guide device

Claims (3)

[Claims] 1. At least two string-like guides, which move almost in synchronization with a strip, are provided on a transfer table or an apron between an outlet side of a hot finishing mill and an inlet side of a winder, The strip is sandwiched between the conveying table or apron and the string-shaped guide body, and is stably conveyed from the finish rolling mill exit side to the winding machine entrance side, and the string-shaped guide body is opposed to the line drive side and the working side. A high-speed hot strip passing apparatus for hot strips, wherein the strips are movable independently or in conjunction with each other in the strip width direction. 2. In the measurement zone on the exit side of the hot finishing mill and on the entrance side of the winding machine, the cord-shaped guide body is divided independently from other portions, and the measurement field of view and measurement of various measuring instruments are provided. 2. A high-speed hot strip passing apparatus according to claim 1, wherein the string-shaped guide body is independently movable in the strip width direction with the position or movement of the measuring instrument so as not to hinder the operation. . 3. The two opposing string-shaped guide bodies are held by a winding / supplying mechanism so as to be movable along a strip traveling direction in a certain section, and are interlocked with or independent of a strip width direction. 3. The high-speed passing device according to claim 1, wherein the high-speed passing device is connected to a width direction control mechanism so as to move.