JPS6195708A - Shape control device of rolling sheet - Google Patents

Abstract

PURPOSE:To control accurately the shape of a rolling sheet by controlling the elongation in its width direction, by pressing a tension-providing roll against a part of rolling sheet required to decrease its sheet thickness and blowing a super low-temperature air against said part. CONSTITUTION:A lifting frame 6 is fixed to the position where tension-providing rolls 3, 3' come close to the lower surface of a rolling sheet S, by raising and lowering the frame 6 through the operation of worm jacks 11, 11' driven by a motor 10. When stepping cylinders 8, 8' are extended; guide rings 7, 7' are raised to turn the rolls 3, 3' around pins 4, 4' respectively, and a load is imposed on the sheet S in width direction so as to increase the tension of sheet S. There fore, the elongations of sheet S at its width-end parts are increased to control the shape of sheet S at its width-end parts are increased to control the shape of sheet S when a middle waviness is produced. Further, on this occasion, when a super low-temperature air is blown against the central part of sheet S from the super low-temperature air generators 13 of a cooling header 14, the better shape control can be performed by the temperature difference of sheet S.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a shape control device for a rolled plate.

- [Prior Art] Generally, metal plates, especially thin plates, are produced by rolling (IT)31, but at this time, due to the effects of elastic deformation, thermal expansion, abrasion, etc. of the rolling rolls, the rolled plates may have ear waves or centering. Shape defects such as elongation occur.

Conventionally, in order to prevent the above-mentioned shape defects in rolled sheets, the main method was to forcibly bend the rolling rolls using a bending device to change the apparent roll profile. As the size of rolls increases, it has become difficult to bend the rolls.

By the way, when tension is applied to the rolled plate, the rolling blades of the rolling rolls decrease in the same way as the deformation resistance of the rolled plate decreases, and when the rolling blades decrease, the thickness of the rolled plate decreases due to the elasticity of the rolling mill, and these It is known that this relationship can be applied to thickness control in thin plate rolling. This also applies when the tension differs in the width direction of the plate; when tension is applied to a part of the plate width, the same effect as reducing the deformation resistance of the plate in that part is obtained, and The reduction rate increases.

[Problem to be Solved by the Invention 1] Therefore, by actively adding a tension distribution that synergizes with the tension difference that occurs in response to disturbances in the shape of the rolled plate, the shape of the rolled plate can be controlled extremely satisfactorily. However, current cold tandem rolling mills for thin plates simply have priddle rolls placed in front and rear of the rolling mill, which can only correct the shape to a certain extent.

In view of these circumstances, the present invention attempts to control the shape of a rolled plate, particularly a thin plate, by controlling the elongation of the rolled plate in the width direction by changing the tension distribution in the width direction of the rolled plate. It is.

[Means for Solving the Problems] The rolled plate shape control device of the present invention has an axis in a direction perpendicular to the feeding direction of the rolled plate at a position near the rolled plate that is fed under a predetermined tension. a suitable number of tension applying rollers disposed in the rolling plate, and a roller tilting device for tilting the tension applying rollers with respect to the surface of the rolling plate; The cooling header includes a plurality of ultra-low temperature air generators for injecting ultra-low temperature air, and further includes a shape detector of the rolled plate, and each of the roller tilting device and the cooling header based on a signal from the shape detector. A super low temperature air generator and a computing unit that sends a command signal to the ultra-low temperature air generator, and a roller vertical position adjustment device that presses the tension applying roller against the surface of the rolled plate. has.

[Function] Therefore, the tension distribution in the width direction of the rolled plate can be actively changed by the tilting of the tension applying roller and the ultra-low temperature air injected from the ultra-low temperature air generator, and the tension distribution in the width direction of the plate can be positively changed. The elongation of the rolled plate is controlled.

[Example] Hereinafter, the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, a shaft 2.2' is provided at a lower position of the rolled plate S that is rolled by the rolling rolls 1.1 and extends in a direction perpendicular to the rolling feed direction of the rolled plate S. Two tension applying rollers 3 and 3' are rotatably and symmetrically provided at such a position that they can cover both width ends of the rolled plate S. The inner ends of the respective shafts 2, 2' of the tensioning rollers 3, 3' are attached to the bins 4.
4' and a bracket 5.5' on the lifting frame 6, and the outer end of the shaft 2.2' has guide wheels 7, 7' whose position and speed are controlled by electric pulse signals. The rod end of the stepping cylinder 8, 8' can be rotatably mounted, and the stepping cylinder 8, 8'
'The body part of the holding frame 9 is attached to the side of the elevating frame 6.
, 9'. Furthermore, a worm jack 11° 11' driven by a motor 10 is installed at the lower part of the lifting frame 6 to adjust the vertical position of the tension applying roller 3.3'.

On the other hand, the rolled plate S upstream from the tension applying roller 3.3'
A plurality of ultra-low temperature air generators 13 are arranged and connected to a main pipe 12 arranged in the width direction of the rolled plate S at the stock position and the upper position of the rolled plate S downstream from the tension applying rollers 3 and 3'. A cooling header 14.14 is provided. The ultra-low temperature air generator 13 is a so-called portex tube, as shown in Figure 3 (Proceedings of the Japan Society of Mechanical Engineers (Part 2)).
Volume 30, No. 219 (Sho 39-11), Volume 31, 2
No. 25 (Showa 40-5), Volume 32, No. 235 (Showa 4L-
3), Vol. 33, No. 248 (Showa 42-4), Vol. 33, No. 2
It was published in No. 53 (Sho 42-9), etc. ), the compressed air 31 is supplied to the nozzle part lea, and the compressed air 31 is jetted into the chamber 17 through several tangential nozzles 16b bored in the tangential direction around the eddy cavity 15 to create a high-speed swirling airflow. High temperature air 32 is blown out from the end, and extremely low temperature air 33 is blown out from the tip. In Figure 3, 18.19 is the orifice, 20
．． 21 is a rectifier, 22 is high temperature air 32 and ultra-low temperature air 33
23 is a cold air extraction orifice, and 24 is a backflow region boundary. In the present invention, an injection nozzle 25 is attached to the tip of the chamber 17 to uniformly eject ultra-low temperature air 33.

Further, a shape detector 26 of the rolled plate S is installed at a position further downstream of the tension applying rollers 3, 3' of the rolled plate S and the cooling header 14.14, and the signal detected by the shape detector 26 is After being sent to the calculator 27 for calculation, it is sent to the stepping cylinder drive unit 28 as a position control signal, and is also sent to the regulating valve 22 of the cooling header 14 as a flow rate control signal.

In such a configuration, when controlling the shape of the rolled plate S, the rolled plate S is sent out from the rolling roll 1.1 and is wound onto a take-up reel (not shown) to always give a constant tension. S, first drive the motor 10 and operate the worm jack 11, 11' to raise and lower the lifting frame 6, and tension applying rollers 3, 3'
is fixed at a position such that it is close to the lower surface of the rolled plate S.

If the stepping cylinders 8, 8' are extended in this state, the guide wheels 7, 7' will be lifted, and the tension applying rollers 3, 3' will be moved from the state shown in FIG. 2 to the state shown in FIG. 4. It rotates around the bins 4, 4' as shown in FIG. 2, and acts to increase the tension of the rolled plate S by applying a load in the width direction of the rolled plate S.

Therefore, the tension distribution in the width direction of the rolled plate S becomes higher as it approaches the edge of the plate, and the elongation of the edge of the width of the rolled plate S increases, making it possible to control the shape at mid-elongation. Further, at this time, if ultra-low temperature air is injected toward the center of the rolled plate 3 from the ultra-low temperature air generator 13 of the cooling header 14.degree. 14, even better shape control can be performed due to the temperature difference of the rolled plate S.

On the other hand, when the rolled sheet S sent out has an ear wave, the tension applying roller 3.3' acts so as to form a "J" shape, and the width end portion of the rolled sheet S is applied to the cooling header 14.14. Cooling is performed by an ultra-low temperature air generator 13.

In the above, shape defects such as elongation in the rolled sheet S and ear waves are detected by the shape detector 26, and the detected shape signal is calculated as a setting signal by the calculator 27, and is sent to the stepping cylinder drive unit 28, respectively. Ultra-low temperature air generator 1
A control signal is sent to the adjustment valve 22 of No. 3, and the tension applying roller 3
, 3' and the injection amount of ultra-low temperature air from the ultra-low temperature air generator 13 are controlled.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and that the thickness of any part of the rolled plate may be controlled by changing the number or shape of the tension applying rollers. The headers do not necessarily need to be installed at the top and bottom of the rolling plate, but may be installed at least on one side, the number of ultra-low temperature air generators installed in the cooling header is not limited to those shown in the figure, and the tension rollers are installed in advance in the bath. It goes without saying that there is no need for a vertical position adjustment device such as a screwdriver or worm jack.

[Effects of the Invention] As explained above, according to the rolled plate shape control device of the present invention, the tension applying roller is pressed against the part of the rolled plate where the plate thickness is to be reduced, and ultra-low temperature air is injected into that part. By spraying, the elongation of the rolled plate in the width direction of the plate can be actively controlled, so the excellent effect of accurately controlling the shape of the rolled plate, especially the thin plate, can be achieved.

[Brief explanation of drawings]

FIG. 1 is an explanatory side view showing an embodiment of the present invention, FIG. 2 is a view taken along the It-m arrow in FIG. 1, FIG. 3 is an explanatory diagram of the ultra-low temperature air generator, and FIG. FIG. 3 is an explanatory diagram showing a state in which the tension applying roller is tilted from the state shown in FIG. 1 is a rolling roll, 3.3' is a tension applying roller, 4°4'
1 is a bin, 6 is a lifting frame, 8.8' is a stepping cylinder, 13 is an ultra-low temperature air generator, 14 is a cold section header, 26 is a shape detector, and 27 is a computing unit. Patent application Hitoshi Kawajima Harima Heavy Industries Co., Ltd.

Claims (1)

[Scope of Claims] 1) An appropriate number of tension applying rollers disposed with their axes perpendicular to the feeding direction of the rolled plate at positions near the rolled plate that is fed with a predetermined tension; A roller tilting device for tilting the tension applying roller with respect to the surface of the rolled plate, and a plurality of ultra-low temperature air generators disposed on at least one of the upper and lower surfaces of the rolled plate to inject ultra-low temperature air to the rolled plate. further comprising a rolled plate shape detector, and a computing unit that sends command signals to the roller tilting device and each ultra-low temperature air generator of the cooling header based on the signal from the shape detector; A shape control device for a rolled plate, characterized by comprising: 2) At a position near the rolled plate that is fed with a predetermined tension, an appropriate number of tension-applying rollers arranged with their axes perpendicular to the feeding direction of the rolled plate, and rolling the tension-applying rollers. A roller vertical position adjustment device that presses against the plate surface, and a roller tilting device that tilts the tension applying roller with respect to the rolled plate surface, and is arranged on at least one of the upper and lower surfaces of the rolled plate and is arranged on the rolled plate surface. The cooling header includes a plurality of ultra-low temperature air generators for injecting ultra-low temperature air, and further includes a shape detector of the rolled plate, and each of the roller tilting device and the cooling header based on a signal from the shape detector. A control device in the shape of a rolled plate, characterized by comprising an ultra-low temperature air generator and a computing unit that sends command signals to the generator.