JP4258588B2 - Hydraulic side guide control device and control method for rolled material - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rolling material hydraulic side guide control device and a control method for guiding a rolling material to a winder of a hot rolling facility.
[0002]
[Prior art]
In the vicinity of the winder that winds the rolled material from the finish rolling mill group, which is the final process of the hot rolling line, via a pinch roll, there is a pair of parallel portions across the rolling line, and a predetermined amount of opening A side guide device that can be centered while guiding the plate width of the rolled material that enters while holding is installed. The opening adjustment of the side guide for guiding the plate width is performed by advancing / retreating a predetermined length in accordance with the plate width to be entered using a normal hydraulic or pneumatic cylinder.
[0003]
Usually, between the finishing rolling mill group of the hot rolling line and the pinch roll before the winder / winder, a parallel portion having a predetermined amount, that is, an opening degree of sheet width (W) + margin (α) A pair of hydraulic side guides are provided. In the case of this hydraulic side guide, a hydraulic cylinder is attached to the side guide, moved forward and backward with respect to the rolling line to regulate the sheet width direction of the rolled material, and the rolled material entering while performing centering is guided and wound. Winding up with a take-up machine.
[0004]
[Problems to be Solved by the Invention]
Generally, when the rear end portion of the rolled material is carried out from the finishing final rolling mill, which is the final process of winding with the winder, that is, when the bottom end state is lost, the rolled material loses its tension or rolls of pinch rolls. Camber is likely to occur due to the gap in the width direction being non-uniform on the left and right. Normally, hydraulic side guides with hydraulic cylinders can only be position controlled. For this reason, because the plate width side surface of the rolled material in which the camber is generated cannot be positively supported, the rear end speed of the rolled material becomes unstable, and the cooling rate of the metal structure changes, so that a rolled material of a certain quality can be obtained. There was a problem that could not be obtained. Further, only the position control has a problem that the mandrel of the winder stops. In addition, because of poor guideability, the coil side for the final several turns of the winding coil becomes uneven, so-called telescopes are generated, and after-working is required for correction, productivity is reduced. There was also a problem to do.
[0005]
On the other hand, a pneumatic side guide device is disclosed in, for example, Japanese Patent Publication No. 63-45887 (a down-coiler front side guide control device) shown in a schematic diagram of FIG. In FIG. 2, a pneumatic side guide device 1 for a hot rolling line is provided with a pair of guides 3 provided on both sides of the rolling line on the exit side of the finishing final rolling mill 2. Each guide 3 is capable of setting the opening and adjusting the interval with two movable pneumatic cylinders. Further, the operation device 6 controls the operation timing of the interval adjusting mechanism on the basis of the detection signals of the rolling material entry detector 4 arranged on the entry side of these guides 3 and the speed detector 5 of the rolling material entering. It is possible. In the case of a pneumatic cylinder, pressure control can be performed, so that the contact load with the side guide that occurs when the tail is pulled out can be reduced by air pressure. However, in order to improve the ease of pressure control and the buffering effect, it is necessary to considerably increase the diameter of the pneumatic cylinder, and there is a problem that the equipment cost becomes expensive. Further, since the response is inferior even when an operation command is issued as compared with the hydraulic cylinder, there is a problem that a telescope is generated. Furthermore, even if the pressure control can be performed by arranging the pneumatic cylinders on both side guides, the position control cannot be performed, so that the plate width position of the rolled material cannot be confirmed.
[0006]
In addition to the hydraulic and pneumatic side guides described above, a side guide device that compensates for tension as shown in the schematic diagram of FIG. 3 has also been used. In FIG. 3, the side guide device 10 is provided immediately before the winder 11 to allow the rolled material 12 to enter the winder 11, and the tension between the pinch roll 13 and the finishing final rolling mill 14. A so-called 0 (zero) pinch roll 15 is arranged in the vicinity of the pair of side guides 16. With this 0 pinch roll, even if the rear end portion of the rolled material slips out from the finishing final rolling mill, the insufficient tension can be supplemented to enter the winder via the pinch roll. However, in the case of FIG. 3, there is a problem that the equipment cost increases because the number of apparatuses increases and the rolling line extends.
[0007]
The present invention has been developed to solve the above-described problems. That is, the object of the present invention is to prevent the deterioration of the metal structure that occurs at the rear end of the rolled material that has fallen off from the finishing final rolling mill, and the hydraulic pressure of the rolled material that prevents the telescope generated on the side surface of the winding coil. A side guide control device and a control method are provided.
[0008]
[Means for solving problems]
According to the present invention, the rolling material (23) entering the winding machine (24) from the finish rolling mill (21) is disposed opposite to the rolling line P, and one can be position-controlled and the other can be pressure-controlled. A pair of parallel guides (25, 26) for guiding the rolling guide, a hydraulic cylinder (30, 31) for moving the parallel guide forward and backward in the direction perpendicular to the plate width of the rolled material to center the rolled material, and the rolled material And a pressure control device (35) that allows continuous entry into the winder while relaxing the contact load when it comes into contact with the parallel guide, and after the rolled material has fallen out of the finishing mill (21) The position of the one parallel guide is controlled, and the pressure of the other parallel guide is controlled by the pressure control device to control the contact load between the other parallel guide and the rolled material. Ass Ri tension to the rolling material tension in the rolling line direction is insufficient is adapted to be applied to the rolling line direction by the other of the parallel guides, the hydraulic side guides controller of the rolled material, characterized in that Is provided. According to a preferred embodiment of the present invention, when a camber is generated in the rolled material due to the slipping out and the plate width side surface of the rolled material comes into contact with the other parallel guide, the pressure detector that detects the contact load is provided. In addition, when the contact load reaches a predetermined value, tension is applied to the rolled material by the other parallel guide whose pressure is controlled by the pressure control device.
Further, according to the present invention, the rolling material (23) entering the winding machine (24) from the finish rolling mill (21) is disposed opposite to the rolling line P, one of which is position-controllable and the other is pressure. A pair of parallel guides (25, 26) that controllably guide, and a hydraulic cylinder (30, 31) that advances and retracts the parallel guides in a direction perpendicular to the plate width of the rolled material to center the rolled material, A pressure control device (35) capable of continuously entering the winder while relaxing the contact load when the rolled material comes into contact with the parallel guide, and the rolled material is removed from the finish rolling mill (21). Then, the position of the one parallel guide is controlled, and the pressure of the other parallel guide is controlled by the pressure control device to control the contact load between the other parallel guide and the rolled material, thereby , In the ass Tension in the rolling line direction is the applied to the rolling line direction tension by the other parallel guides with respect to the rolling member to be insufficient Ri, hydraulic side guide control method of the rolled material, characterized in that there is provided. According to a preferred embodiment of the present invention, when a camber is generated in the rolled material due to the trailing edge and a plate width side surface of the rolled material comes into contact with the other parallel guide, the pressure detector detects the contact load. When the contact load reaches a predetermined value, tension is applied to the rolled material by the other parallel guide whose pressure is controlled by the pressure control device.
[0009]
According to the configuration of the present invention, a pair of parallel guides (25, 26), one of which can be position-controlled and the other of which can be pressure-controlled, and the parallel guides are advanced in a direction perpendicular to the plate width of the rolled material. Since the hydraulic cylinders (30, 31) for reversing and centering the rolled material are provided, position control is performed with one parallel guide using the hydraulic cylinder, and pressure control is performed with the other parallel guide disposed oppositely. It becomes possible.
As a result, even if a camber occurs due to insufficient tension at the rear end of the rolled material that has been slipped off from the finishing final rolling mill, a pair of hydraulic side guides that can separately and synchronize position control and pressure control are used for smooth operation. It is easy to let the rolled material enter the winder.
In addition, a pressure control device (35) is provided that allows the rolled material to continuously enter the winder while relaxing the contact load when the rolled material comes into contact with the parallel guide. Even if a contact load that becomes an impact force is generated in contact with the parallel guide to be controlled, the pressure control device can continuously enter the winder while reducing the contact load. Thereby, the coil side surface for the last several turns of the winding coil does not have a non-uniform shape. Therefore, it is possible to prevent the telescope from occurring.
[0010]
According to a preferred embodiment of the present invention, the pressure control device (35) detects the contact load generated in the parallel guide by the contact of the rolling material, and detects the position of the parallel guide. Position detectors (32, 41), a calculator (42) for inputting and calculating a pressure detection signal from the pressure detector and a position detection signal from the position detector, and a command received from the calculator And a servo valve (43) that allows the parallel guide to be retracted by a predetermined length by reducing the pressure at a high speed.
[0011]
According to this configuration, when the plate width side surface of the rear end portion of the rolled material in which the camber is generated due to insufficient tension due to the trailing edge comes into contact with the pressure-controllable parallel guide and generates an impact force, that is, a contact load, it is parallel. The contact pressure can be immediately detected by a pressure detector (39, 40) connected to a hydraulic cylinder attached to the guide. Furthermore, position detectors (32, 41) are also attached to the parallel guides. The pressure signal and the position signal detected from each of these detectors are input to the calculator and calculated, and when a predetermined set pressure is reached, the parallel guide is retracted by a predetermined length by reducing the pressure at a high speed and rolling. The servo valve can be commanded to support the parallel guide so as to apply tension to the rolling line direction while being in contact with the plate width side surface of the material. In this way, while actively supporting the plate width side, it is allowed to enter the winder continuously and at a constant speed, so that the cooling rate of the rear end of the rolled material is kept constant to prevent deterioration of the metal structure, A high-quality winding coil can be obtained. Moreover, since tension can be applied in the rolling line direction , it is possible to eliminate the need for a 0-pinch roll that supplements the tension that is sometimes arranged upstream of the pinch roll before the winder.
[0012]
Further, according to the present invention, the rolling material (23) entering the winding machine (24) from the finish rolling mill (21) is disposed opposite to the rolling line P, one of which is position-controllable and the other is pressure. A pair of parallel guides (25, 26) that controllably guide, and a hydraulic cylinder (30, 31) that advances and retracts the parallel guides in a direction perpendicular to the plate width of the rolled material to center the rolled material, A pressure control device (35) comprising a pressure detector, a position detector, a servo valve, and an arithmetic unit that allow continuous entry into the winder while relaxing the contact load when the rolled material comes into contact with the parallel guide; (1) When the trailing edge of the rolled material slips out of the finishing final rolling mill during winding and a camber is generated and the plate width side surface of the rolled material contacts the parallel guide, the contact load Is detected by the pressure detector (39, 40), and (2 Next, when the predetermined pressure is reached, the parallel guide receives a command from the computing unit (42) and operates the servo valve (43) to move the parallel guide at a high speed in contact with the plate width side surface of the rolled material, (3) In addition, one parallel guide controls the position of the plate width side surface, and the other parallel guide supports the opposite plate width side surface while applying tension in the rolling line direction to guide the rolled material continuously and smoothly. There is provided a method for controlling a hydraulic side guide of a rolled material.
[0013]
According to the above-described method of the present invention, a hydraulic cylinder type side guide comprising a pair of parallel guides (25, 26) that guides one of which is position-controllable and the other pressure-controllable across a rolling line, and rolling A pressure control device (35) comprising a pressure detector, a position detector, a servo valve, and a computing unit that allow continuous entry into the winder while relaxing the contact load when the material contacts the parallel guide. Therefore, even if a camber occurs when the trailing end of the rolled material slips out of the finishing final rolling mill during winding and the tension in the rolling line direction is insufficient or eliminated, one of the parallel guides The position of the plate width side surface can be controlled, and at the same time, the other parallel guide can support the opposite plate width side surface of the rolled material to positively apply tension in the rolling line direction . Accordingly, since the rolled material is allowed to enter the winder continuously and at a constant speed without stopping, deterioration of the metal structure at the rear end can be prevented. In addition, since the contact load, which is an impact force when the plate width side surface of the rolled material comes into contact with the parallel guide, can be immediately detected and controlled by the pressure control device (35), it can be buffered. A scope can be prevented and a good-quality winding coil can be obtained efficiently.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an overall plan view showing a hydraulic side guide control device for rolled material according to the present invention. In this figure, the hydraulic side guide control device 20 is arranged on the table roller 22 from the exit side of the finishing final rolling mill 21 of a plurality of (usually 5 to 7) finishing mills provided near the downstream side of the hot rolling facility. Is composed of a pair of parallel guides 25 and 26 that are arranged opposite to each other across a rolling line P between a plurality of winding machines 24 (one in this figure) that winds the rolled material 23 entering at a high speed. ing. In addition, between the exit side of the parallel guides 25 and 26, and the winder 24, the pinch roll 27 which consists of a rotatable upper and lower roll which makes the winder 24 smoothly carry in the winder 24, and also the roll material 23 are further provided. A shear (not shown) that can be cut to a predetermined length is disposed.
[0015]
In addition, hydraulic cylinders 30 and 31 are attached to the side opposite to the rolling line P of the pair of parallel guides 25 and 26, respectively. As a result, the rolled material 23 can be centered by moving forward and backward in a tuneable manner in a direction perpendicular to the plate width W of the rolled material 23. Usually, the distance between the parallel guides 25 and 26, that is, the opening degree is set so as to maintain the plate width W + the margin allowance α (30 to 50 mm) in order to make the rolled material smoothly enter. The parallel guide 25 of the pair of hydraulic side guides can be guided so as to be position-controllable by attaching a position detector 32 for detecting the position of the plate width side surface S1 of the rolled material 23 entering. Furthermore, the other parallel guide 26 can guide pressure-controllable with respect to the sheet width side surface S2 of the rolling material 23 that enters.
Therefore, even if camber occurs due to insufficient tension at the rear end of the rolled material that has been removed from the finishing final rolling mill, position control is performed with one parallel guide and pressure control is performed simultaneously with the other parallel guide. Since the hydraulic side guide can be used, it is easy to smoothly enter and wind the rolled material continuously into the winder.
[0016]
Further, on the parallel guide 26 side, the rear end portion S3 of the rolled material 23 slips out of the finishing final rolling mill 21 and the tension is insufficient, so that camber is generated, and the plate width side surface S2 of the rolled material 23 is parallel. Even if a contact load due to an impact force is generated by contact with the guide 26, a pressure control device 35 is provided so that the contact load can be continuously entered while relaxing the contact load.
[0017]
Further, the pressure control device 35 detects a contact load generated in the parallel guide 26 due to contact with the plate width side surface S2 of the rolled material 23, and each of the hydraulic chambers 37 and 38 sandwiching the piston portion 36 of the hydraulic cylinder 31. Pressure detectors 39 and 40 connected to each other, a position detector 41 for detecting the position of the parallel guide 26, a pressure detection signal from the pressure detector 39 or 40, and a position detection signal from the position detector. And a servo valve 43 that receives a command from the calculator 42 and depressurizes at a high speed when the pressure reaches a predetermined set pressure so that the parallel guide 26 can be retracted by a predetermined length L. .
[0018]
According to this configuration, the plate width side surface at the rear end of the rolled material in which the camber is generated due to insufficient tension due to the trailing edge is attached to the parallel guide when an impact force due to contact with the pressure-controllable parallel guide, that is, contact load is generated The contact pressure can be immediately detected by a pressure detector connected to the hydraulic cylinder. Further, a position detector is attached to the parallel guide. The pressure signal and position signal detected from these detectors are input to the calculator and are calculated. When the pressure reaches a predetermined set pressure, the pressure is reduced at a high speed and the parallel guide is retracted by a predetermined length. The servo valve can be instructed to support the parallel guide so as to apply tension to the rolling line direction while being in contact with the side surface. In this way, while actively supporting the plate width side, it is allowed to enter the winder continuously and at a constant speed, so that the cooling rate of the rear end of the rolled material is kept constant to prevent deterioration of the metal structure, A high-quality winding coil can be obtained. Moreover, since tension can be applied in the rolling line direction , it is possible to eliminate the need for a 0-pinch roll that supplements the tension that is sometimes arranged upstream of the pinch roll before the winder.
[0019]
In addition, when both of this pair of hydraulic parallel guides are set to pressure control, it is impossible to reliably grasp the position of the plate width side surface S1 or S2 of the rolled material 23 after the bottom end. This causes troubles such as telescopes. On the other hand, in the present invention, the position of one hydraulic parallel guide 25 is controlled and the pressure of the other hydraulic parallel guide 26 is controlled, so that camber is generated due to insufficient tension and the plate width as shown by the solid line. Even if the side surface S2 is in contact with the contact part a part (or the part b shown by the dotted line) of the parallel guide 26, the position of the plate width side surface S1 is controlled on the parallel guide 25 side. I can grasp. Since this position information can be input to the calculator 42 by the position detector 32 and fed back to the pressure control on the parallel guide 26 side, it can be easily wound by a winder continuously without stopping the entry of the rolling material. Can do.
[0020]
Next, the hydraulic side guide control method of the present invention will be described using the hydraulic side guide control device 20 of FIG. Using the above-described hydraulic side guide control device 20 for the rolled material 23, (1) the camber because the rear end S3 of the rolled material 23 slips out of the finishing final rolling mill 21 during winding and the tension is insufficient. Is generated and the sheet width side surface S2 of the rolled material comes into contact with the parallel guide 26 (a part or b part), the contact load is detected by the pressure detectors 39 and 40, and (2) next to a predetermined pressure. When reaching the parallel guide 26, the servo valve 43 is actuated in response to a command from the computing unit 42 to move the parallel guide 26 by a predetermined length L at a high speed in contact with the sheet width side surface S2 of the rolled material. 25, the sheet width side surface S1 side is position-controlled, and the other parallel guide 26 supports the sheet width side surface S2 while applying tension in the rolling line direction to guide the rolled material continuously and smoothly. .
[0021]
In this way, even if camber occurs because the trailing edge of the rolled material slips out of the finishing final rolling mill during winding and the tension is insufficient or eliminated, the width of the rolled material is reduced with one parallel guide. It is possible to control the position of the side surface, and simultaneously support the opposite side plate width side surface of the rolled material with the remaining parallel guides and positively apply tension in the rolling line direction and press it. Thereby, since the rolled material is allowed to enter the winder continuously and at a constant speed without stopping, deterioration of the metal structure at the rear end caused by the change in the cooling rate can be prevented. In addition, the contact load, which becomes the impact force when the sheet width side surface of the rolled material comes into contact with the parallel guide, can be immediately detected and controlled by the pressure control device and buffered, and the tension in the sheet width direction is further applied. Since the telescope generated on the side surface of the take-up coil can be prevented, a high-quality take-up coil can be obtained efficiently.
[0022]
In addition, this invention is not limited to embodiment mentioned above, Of course, it can change variously in the range which does not deviate from the summary of this invention.
[0023]
【The invention's effect】
As described above, according to the hydraulic side guide control device and control method for rolled material of the present invention, the deterioration of the metal structure occurring at the rear end of the rolled material that is being wound from the finishing final rolling mill. It has excellent effects such as prevention and prevention of telescope generated on the side surface of the winding coil.
[Brief description of the drawings]
FIG. 1 is an overall plan view showing a hydraulic side guide control device for rolled material according to the present invention.
FIG. 2 is a schematic view showing a conventional pneumatic side guide.
FIG. 3 is a schematic view showing another conventional side guide device.
[Explanation of symbols]
1 Pneumatic side guide device 2, 14, 21 Finishing final rolling mill (finishing mill)
3 Guide 4 Approach detector 5 Speed detector 6 Arithmetic device 10 Side guide device 11, 24 Winder 12, 23 Rolled material 13, 27 Pinch roll 150 0 (zero) pinch roll 16 Side guide 20 Hydraulic side guide control device 22 Table rollers 25 and 26 Parallel guides 30 and 31 Hydraulic cylinders 32 and 41 Position detector 35 Pressure control device 36 Piston portions 37 and 38 Hydraulic chambers 39 and 40 Pressure detector 42 Calculator 43 Servo valve P Rolling line W Sheet width α Margin Allowance S1, S2 Plate width side S3 Rear end L Predetermined length a part, b part Contact part

Claims (6)

A pair of parallel guides in which the rolling material (23) entering the winder (24) from the finish rolling mill (21) is arranged opposite to each other across the rolling line P, and one is position-controllable and the other is pressure-controllable. When the guides (25, 26), the hydraulic cylinders (30, 31) for moving the parallel guides forward and backward in the direction perpendicular to the sheet width of the rolled material to center the rolled material, and the rolled material contact the parallel guide A pressure control device (35) that allows continuous entry into the winder while relaxing the contact load ,
After the rolled material has slipped out from the finishing mill (21), the position of the one parallel guide is controlled, and the pressure of the other parallel guide is controlled by the pressure control device, and the other parallel guide is controlled. The contact load between the rolled material and the rolled material is controlled, whereby tension is applied to the rolled material in the rolling line direction by the other parallel guide to the rolled material in which the tension in the rolling line direction is insufficient due to the trailing edge. An apparatus for controlling a hydraulic side guide of a rolled material. When a camber is generated in the rolled material due to the bottom and the sheet width side surface of the rolled material comes into contact with the other parallel guide, a pressure detector that detects the contact load is provided.
The tension is applied to the rolled material by the other parallel guide whose pressure is controlled by the pressure control device when the contact load reaches a predetermined value. Hydraulic side guide control device for rolled material. The pressure control device (35) includes a pressure detector (39, 40) for detecting a contact load generated in the parallel guide by the contact of the rolled material, and a position detector (32, 41) for detecting the position of the parallel guide. An arithmetic unit (42) that inputs and calculates a pressure detection signal from the pressure detector and a position detection signal from the position detector, and reduces the pressure at a high speed when a predetermined set pressure is reached in response to a command from the arithmetic unit The hydraulic side guide control device for a rolled material according to claim 1, further comprising: a servo valve (43) capable of retracting the parallel guide by a predetermined length. A pair of parallel guides in which the rolling material (23) entering the winding machine (24) from the finish rolling mill (21) is arranged opposite to each other across the rolling line P so that one can control the position and the other can control the pressure. When the guides (25, 26), the hydraulic guides (30, 31) for moving the parallel guides forward and backward in the direction perpendicular to the plate width of the rolled material to center the rolled material, and the rolled material contact the parallel guide A pressure control device (35) that allows continuous entry into the winder while relaxing the contact load,
After the rolling material has slipped out of the finish rolling mill (21), the position of the one parallel guide is controlled, and the pressure of the other parallel guide is controlled by the pressure control device, thereby the other parallel guide. The contact load between the rolled material and the rolled material, thereby applying tension to the rolled material in the rolling line direction by the other parallel guide to the rolled material in which the tension in the rolled line direction is insufficient due to the trailing edge. A method for controlling a hydraulic side guide of a rolled material. When the camber is generated in the rolled material due to the bottom and the sheet width side surface of the rolled material comes into contact with the other parallel guide, a pressure detector that detects the contact load is provided.
The hydraulic side guide for rolled material according to claim 4, wherein when the contact load reaches a predetermined value, tension is applied to the rolled material by the other parallel guide whose pressure is controlled by the pressure control device. Control method. A pair of parallel guides in which the rolling material (23) entering the winder (24) from the finish rolling mill (21) is arranged opposite to each other across the rolling line P, and one is position-controllable and the other is pressure-controllable. When the guides (25, 26), the hydraulic cylinders (30, 31) for moving the parallel guides forward and backward in the direction perpendicular to the sheet width of the rolled material to center the rolled material, and the rolled material contact the parallel guide A pressure control device (35) comprising a pressure detector, a position detector, a servo valve, and a computing unit that allow continuous entry into the winder while relaxing the contact load;
When the trailing end of the rolled material slips out from the finishing final rolling mill during winding and a camber is generated and the sheet width side surface of the rolled material comes into contact with the parallel guide, the contact load is measured by a pressure detector (39 40)
Next, when the predetermined pressure is reached, the parallel guide receives a command from the computing unit (42) and operates the servo valve (43) to move the parallel guide at a high speed in contact with the plate width side surface of the rolled material,
In addition, one parallel guide controls the position of the plate width side surface, and the other parallel guide supports the opposite plate width side surface while applying tension in the rolling line direction to guide the rolled material continuously and smoothly. A method for controlling a hydraulic side guide of a rolled material, characterized by comprising:

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