JP2009274101A - Control method and control device for roll coolant in foil rolling machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of controlling roll coolant can control plate form to a target form by performing stable form control of materials to be rolled, even under various rolling conditions. <P>SOLUTION: In the method of controlling roll coolant, a first control parameter and a second control parameter are preliminarily set and either of the first control parameter or the second control parameter is selected based on the form detected by the form detector 4 corresponding to rolling conditions, to control the jetting of the coolant; wherein the first control parameter is set for jetting the coolant to work rolls 2a and 2b from nozzles 6 of coolant jetting devices 5a and 5b corresponding to elongation detecting zone, by detecting the plate form after being rolled of a material 3 to be foil-rolled by the work rolls 2a and 2b of a foil rolling machine 1 for each prescribed unit width (zone) with a form detector 4, and the second control parameter is set for jetting the coolant from the nozzles 6 corresponding to the widening detecting zone, when the detected form is in the elongation direction compared with a target form. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a foil rolling machine for foil rolling a plate-shaped rolled material, and in particular, a so-called roll coolant control method for controlling the shape of a rolled material by controlling injection of coolant to a rolling roll in the foil rolling machine. And a control device.

  Conventionally, in rolling mills that roll through rolled material between upper and lower work rolls, especially when performing foil rolling with extremely thin plate thickness, in order to improve operational stability, such as ensuring product quality and preventing foil breakage However, shape control is extremely important. However, in such foil rolling, since the formed plate thickness (foil thickness) is thin, the upper and lower work rolls often come into contact with each other during rolling (referred to as work roll kiss). The method of controlling the bending state of the work roll by a vendor or the like and mechanically controlling the shape of the rolled material is difficult to exert its original function, so that sufficient shape control cannot be performed. there were.

  Therefore, instead of such mechanical control, roll coolant control that performs shape control using the thermal expansion of the work roll has been performed. In this roll coolant control, the thermal expansion of the work roll is adjusted by controlling the blowing of coolant (cooling medium) to the work roll to be rolled. That is, the shape detector detects the shape of the rolled material in the width direction, and in accordance with the detected shape deviation, determines the coolant injection amount corresponding to the portion detected by the shape detector, and the thermal expansion of the work roll. The change in the roll radial direction due to the above is controlled, and thus the plate shape of the rolled material is controlled. And, according to such roll coolant control, there is a local stretch and tension shape correction capability that is difficult to correct by mechanical control, and since there is a good shape correction capability even in the work roll kiss state, the foil It is suitably employed in rolling.

  As described above, the coolant sprayed to the work roll is very effective as a shape control actuator. However, as for the influence on the shape due to the thermal expansion of the work roll, in general, the foil end (plate end) ) Has a problem that roll coolant control is likely to become unstable. Therefore, various methods have been proposed in the past in order to improve the roll coolant control at the foil end.

  For example, in Japanese Patent Publication No. 3-033042 (Patent Document 1), the flow rate gain can be set for each coolant nozzle, and the flow rate of the coolant nozzle within a certain range from the end portion where the axial heat flow in the work roll is large. The gain can be set large, and the flow rate gain can be set small for other coolant nozzles. In addition, a low temperature sub-system is added to the nozzle at the end of the plate to switch between high temperature coolant and low temperature coolant. Further, a roll coolant control method in the shape control device that can further expand the range of the cooling capacity has been clarified.

  Further, in Japanese Patent No. 2544003 (Patent Document 2), a coolant set at a temperature lower than the temperature of the work roll is injected into the rolling area of the work roll and excluding both end portions over the predetermined width. On the other hand, the temperature was set to a temperature higher than the temperature of the work roll in the both end portions and the non-rolling region of the work roll adjacent to the end portion and excluding the region extending over a predetermined width adjacent to the both end portions. A method for controlling the shape of a rolled thin sheet in which coolant is injected has been clarified.

  According to such a control method, it is possible to stably control the thermal expansion of the work roll even at the plate end portion, so that sharp shape fluctuations at the foil end portion are suppressed, and problems such as foil breakage may occur. Can be effectively avoided.

  However, in such conventional roll coolant control, the thermal expansion amount of the work roll is controlled by changing the coolant injection amount of the nozzle or by separately using low temperature coolant or high temperature coolant. As a result of various investigations and examinations by the present inventors in the foil rolling machine, the shape is always in the elongation direction by injecting the coolant under a certain rolling condition regardless of the coolant temperature. It was confirmed that there was a case.

  For this reason, under rolling conditions in which the shape is always in the elongation direction by injecting the coolant regardless of the coolant temperature, the same concept of coolant control as in the prior art is based on the plate shape relative to the target shape. If there is a part that is on the extension side, spray the coolant at a temperature lower than the work roll temperature to the corresponding work roll part to suppress the thermal expansion, and change the plate shape to the tension side However, as a result, the plate shape further changes to the extension side and to the opposite side, which causes a problem that the shape deviation is further deteriorated.

Japanese Patent Publication No. 3-033042 Japanese Patent No. 2544003

  Here, the present invention was made in the background of such circumstances, the place to solve the problem is to perform stable shape control of the rolled material even under various different rolling conditions, An object of the present invention is to provide a roll coolant control method and apparatus for controlling a plate shape (foil shape) to a target shape.

  And in this invention, in order to solve an above-described subject, while arrange | positioning several coolant injection nozzles in the width direction of the rolling roll in the foil rolling machine which foil-rolls a plate-shaped rolling material, this rolling roll The plate shape in a plurality of zones set in the width direction of the rolled material on the exit side is detected by a shape detector, and based on the detected shape in the plurality of zones, the coolant from the plurality of nozzles to the rolling roll The nozzle corresponding to the elongation detection zone when the shape detected by the shape detector in the plurality of zones is in the extension direction with respect to the target shape when controlling the shape of the rolled material by controlling the injection The first control parameter for injecting the coolant from and the tension detection when the detected shape is in the tension direction with respect to the target shape And a second control parameter for injecting coolant from the nozzle corresponding to the flow, and the first control parameter based on the plate shape detected by the shape detector according to the rolling conditions by the rolling roll. And a control method for roll coolant in a foil rolling machine, wherein either one of the second control parameters is selected and the injection of coolant from all nozzles within the sheet width is controlled. This is the gist.

  Accordingly, when the plate shape (foil shape) can be controlled to the target shape by the normal coolant injection method, the coolant injection is performed when the detected shape is in the extending direction with respect to the target shape. If the rolling conditions are such that the shape is always in the direction of elongation when the coolant is injected regardless of the coolant temperature, the detected shape is stretched against the target shape. By switching to the second control parameter to perform coolant injection when it is in the direction, various different rolling conditions such as the material of the foil material, the target thickness, the sheet width, the rolling speed, the rolling reduction, etc. In this case, the foil shape can be controlled to the target shape.

  In addition, according to one of the desirable modes of the roll coolant control method in the foil rolling machine according to the present invention, the degree of shape deviation in the plate width when the coolant injection control is performed with the first control parameter, and Comparing the degree of shape deviation in the sheet width when the coolant injection control is performed with the second control parameter, and selecting the control parameter with the smaller degree of shape deviation, and the foil rolling machine Thus, the rolled material is subjected to foil rolling.

  Thus, for example, even when the rolling conditions are not clear, such as when the shape is always in the elongation direction by spraying the coolant, regardless of the coolant temperature, the detected shape is compared with the target shape during rolling. The degree of the actual shape deviation within the plate width when the control is performed with the first control parameter for performing the coolant injection in the extension direction, and the detected shape is the tension direction with respect to the target shape. By comparing the degree of actual shape deviation within the plate width when control is performed with the second control parameter for performing coolant injection in a case where all nozzles within the plate width are collectively Therefore, it is possible to perform the coolant control by switching to the control parameter with the smaller degree of the shape deviation, so that it is more suitable according to the actual behavior of the shape deviation. It becomes possible to perform such coolant control.

  Further, in the present invention, a plurality of coolant injection nozzles are arranged in the width direction of the rolling roll in the foil rolling machine for foil rolling the plate-shaped rolled material, while the rolling material is arranged in the width direction on the outlet side of the rolling roll. The shape of the rolled material is detected by detecting the plate shape in the set plurality of zones with a shape detector and controlling the injection of coolant from the plurality of nozzles to the rolling roll based on the detected shape in the plurality of zones. As a device for performing shape control, when the shape detected by the shape detector in the plurality of zones is in an extending direction with respect to a target shape, coolant is injected from the nozzle corresponding to the extension detecting zone. A first setting means for setting a first control parameter; and a shape detected by the shape detector in the plurality of zones Second setting means for setting a second control parameter for injecting coolant from the nozzle corresponding to the tension detection zone when the tension is in the tension direction, and the shape detection according to the rolling condition by the rolling roll Selection means for selecting one of the first and second control parameters based on the plate shape detected by the container, and controlling the injection of coolant from all nozzles within the plate width; The gist of the present invention is also a roll coolant control device in a foil rolling machine.

  As a result, when the foil shape can be controlled to the target shape by the normal coolant injection method, the control parameter for performing the coolant injection when the detected shape is in the extension direction with respect to the target shape. When the rolling conditions are such that the shape is always in the elongation direction by switching or spraying the coolant regardless of the coolant temperature as described above, the detected shape becomes the tension direction with respect to the target shape. Can be controlled by switching to the control parameter for performing coolant injection when the coolant injection control is performed according to the preset rolling condition or with the first control parameter. Within the plate width when the coolant injection control is performed with the second control parameter. The foil shape can be changed to the target shape even under various rolling conditions because it can be performed manually according to the behavior of the shape deviation obtained by comparing the degree of shape deviation to be obtained or by the operator's judgment. And can be advantageously controlled.

  Furthermore, according to one of the desirable aspects of the roll coolant control device in the foil rolling machine according to the present invention, the selection means has a plate width when the coolant injection control is performed with the first control parameter. And the shape deviation within the plate width when the coolant injection control is performed with the second control parameter, and the smaller the degree of the shape deviation. A control parameter is selected, and the rolled material is rolled by the foil rolling machine.

  Thus, according to the present invention, based on the plate shape detected by the shape detector according to the rolling conditions, when the detected shape by the shape detector is in the extending direction with respect to the target shape. Select one of the first control parameter for injecting the coolant and the second control parameter for injecting the coolant when it is in the tension direction, and select a plurality of nozzles arranged in the width direction of the rolling roll. Since the injection of the coolant from each is controlled, the plate shape (foil shape) can be easily controlled to the target shape even under various rolling conditions.

  In other words, the foil shape is controlled to the target shape by switching the control parameter even when there is a rolling condition in which the shape is always in the elongation direction by injecting the coolant regardless of the coolant temperature. Therefore, the shape control accuracy can be improved.

  Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described in detail with reference to the drawings.

  First, FIG. 1 schematically shows an embodiment of a foil rolling process employing a roll coolant control method in a foil rolling machine according to the present invention. The foil rolling mill 1 is a general single stand type two-stage rolling mill composed of two rolling rolls, an upper work roll 2a and a lower work roll 2b, and the upper work roll 2a and the lower work roll 2b. Thus, the rolled material 3 is subjected to foil rolling. Here, foil rolling generally means rolling a rolled material to a thickness of about 100 μm or less, and in particular, in the control method of the present invention, in a particularly thin foil thickness of 30 μm or less. , Will be preferably adopted. Further, as the rolled material 3, various metal materials can be targeted, but preferably the present invention is advantageously applied in thin foil rolling of aluminum or aluminum alloy.

  The shape of the rolled material 3 rolled by the upper work roll 2 a and the lower work roll 2 b is detected by the shape detector 4 on the exit side of the foil rolling machine 1. In addition, this shape detector 4 is a well-known one that can be directly measured with a predetermined unit width in the sheet width direction, and the width direction of the rolled material 3 to be rolled with a foil has a predetermined unit width (zone). The plate shape (tension) in each zone is detected by dividing into a plurality of zones.

  Moreover, in the direction which becomes the entrance side of the rolling material 3 with respect to the upper work roll 2a and the lower work roll 2b, the coolant injection apparatus 5a which sprays a cooling medium (coolant) with respect to those upper and lower work rolls 2a and 2b, respectively. 5b is arrange | positioned in the up-down direction on both sides of the rolling material 3. FIG. That is, one set of coolant injection device 5a is arranged for the upper work roll 2a, and one set of coolant injection device 5b is arranged for the lower work roll 2b. In each of the coolant injection devices 5 a and 5 b, a plurality of nozzles 6 are generally detected by the shape detector 4 in the width direction of the rolled material 3 at predetermined intervals in the width direction of the rolled material 3. These unit widths (zones) are provided at intervals similar to each other, and coolant is jetted from the plurality of nozzles 6 to the upper work roll 2a and the lower work roll 2b. In addition, each nozzle 6 in each coolant injection device 5a, 5b is controlled to independently inject coolant by a valve (not shown) attached thereto.

  Further, the coolant injection from the nozzles 6 of the coolant injection devices 5a and 5b is controlled by the roll coolant control device 10 based on the plate shape detection information of each zone by the shape detector 4. ing. That is, this roll coolant control apparatus 10 respond | corresponds to the said elongation detection zone, when the detection shape in each of the above-mentioned several zone of the rolling material 3 by the shape detector 4 is an extension direction with respect to a target shape. First setting means 7 for presetting first control parameters for injecting coolant from the nozzle 6 to the work rolls 2a and 2b, and when the detected shape is in a tension direction with respect to the target shape The second setting means 8 for presetting the second control parameter for injecting the coolant from the nozzle 6 corresponding to the tension detection zone, and any one of the control parameters set by the setting means 7 and 8 are set. The parameter switching means which is a selection means for selecting based on the rolling conditions of the rolled material 3 to be rolled and the plate shape detected by the shape detector 4 And a 9 is what is configured.

  And according to the control parameter selected in this roll coolant control apparatus 10, the injection of the coolant in each nozzle 6 of the coolant injection apparatuses 5a and 5b with respect to the upper and lower work rolls 2a and 2b is collectively controlled by the coolant controller 11. It has become so. That is, when the first control parameter is selected, a signal corresponding to the first control parameter is output from the coolant controller 11 to the coolant injection devices 5a and 5b, and the opening and closing and the opening degree of the valve provided in each nozzle 6 are determined. By being controlled, coolant injection is performed only from the nozzles 6 of the coolant injection devices 5a and 5b corresponding to the extension detection zones detected by the shape detector 4 in the extension direction. -ing When the second control parameter is selected, a signal corresponding to the second control parameter is output from the coolant controller 11 to the coolant injection devices 5a and 5b, and the opening and closing and the opening degree of the valve provided in each nozzle 6 are determined. Contrary to the above, by the control, the coolant injection is performed only from the nozzles 6 of the coolant injection devices 5a and 5b corresponding to the tension detection zones detected by the shape detector 4 as being in the tension direction. Will be performed.

  Here, the control parameter means that when the coolant is sprayed from the nozzles 6 of the coolant sprayers 5a and 5b to the upper and lower work rolls 2a and 2b, the rolling material 3 that is foil-rolled by the work rolls is used. It is a value representing the degree to which the plate shape after rolling changes, and the first control parameter and the second control parameter have different values from each other. That is, in the case where the plate shape is in the extending direction and in the case where the plate shape is in the stretching direction, the change in the plate shape due to the injection of the coolant is in the opposite direction. The second control parameter is a value whose sign is reversed.

  Further, here, the switching of the first control parameter and the second control parameter by the parameter switching means 9 is performed within the arbitrary time during rolling, generally at the beginning of rolling, at the positions of the nozzles 6 of the coolant injection devices 5a and 5b. When the detected shape of the shape detector 4 in the zone (a predetermined unit width in the width direction) corresponds to the target shape, the coolant injection is controlled with the first control parameter. The coolant injection is controlled with the second control parameter when the degree of shape deviation within the width of the sheet and the detected shape within an arbitrary time during rolling are in the tension direction with respect to the target shape. In comparison with the degree of shape deviation within the plate width at the time, the control parameter with the smaller degree of shape deviation is set to each of all the nozzles 6 within the plate width. Automatic switching of control parameters for each of all nozzles 6 within the sheet width, based on the method of automatic switching and the selection of accumulated past control parameters in accordance with preset rolling conditions. And a method of switching control parameters for each of all the nozzles 6 within the sheet width based on the judgment of the operator from the background of selection of control parameters according to rolling conditions. To be able to be.

  Further, during rolling, the shape deviation of each zone is obtained by comparing the shape of each zone in the sheet width direction of the rolled material 3 detected by the shape detector 4 with the target shape of each zone. Then, based on the shape deviation in each zone and the first or second control parameter selected by the control parameter switching means 9, the coolant controller 11 causes the nozzles 6 of the coolant injection devices 5a and 5b. The roll coolant control is performed by controlling the injection amount and the injection time of the coolant injected from the nozzle.

  Thus, according to the foil rolling machine which employ | adopted the control system of the roll coolant according to this invention, when the plate shape of the rolling material 3 which the shape detector 4 detects is an extension direction with respect to a target shape, it is coolant. First setting means 7 for presetting a first control parameter for performing control, and a first setting unit for performing coolant injection when the detected plate shape is in a tension direction with respect to the target shape. And a second setting means 8 for presetting two control parameters, and according to various rolling conditions, all the nozzles 6 within the sheet width are collectively selected from either of the two control parameters. Parameter switching means 9 for switching to the upper and lower work rolls 2a, 2b, regardless of whether the coolant temperature is high or low. By injecting coolant from the nozzles 6 of the runt injection devices 5a and 5b, it becomes possible to control the thermal expansion of the upper and lower work rolls 2a and 2b, and as a result, foil rolling is performed by these upper and lower work rolls 2a and 2b. The shape control of the plate shape of the rolled material 3 can be performed with higher accuracy.

  That is, by injecting the coolant onto the work roll so that the plate shape is always in the extending direction, the change is opposite to the change in the plate shape of the rolled material due to the coolant injection during normal roll coolant control. Even when there are various rolling conditions, the foil shape can be easily controlled to the target shape, and the shape control accuracy can be effectively improved.

  By the way, in order to verify the implementation effect of the present invention with an actual machine, a foil rolling machine and a rolled material adopting a roll coolant control method according to the present invention, which are configured as shown in FIG. 1, are prepared. Then, foil rolling was performed. At this time, the plate material used for rolling was an aluminum alloy plate material, and the rolling conditions were such that the foil thickness after rolling was 13 μm and the plate width was 1515 mm.

  And, using the foil rolling machine and rolled material prepared in this way, first, foil rolling is performed in an initial state in which neither the conventional roll coolant control method nor the roll coolant control according to the present invention is performed, The shape deviation of the foil material was detected by the shape detector 4, and the result is shown in the graph of FIG. In this graph, the horizontal axis indicates the position in the plate width direction in each zone unit, and the vertical axis indicates the shape deviation during rolling in the unit: I-unit with the absolute value omitted. From the graph of FIG. 2A, the zones at both end portions in the width direction have a shape on the extension side with respect to the target shape, and the portions other than the above have a shape on the tension side with respect to the target shape. I understand that.

  Next, the shape detector 4 detects the shape deviation of the foil material during rolling when the foil rolling is performed by the roll coolant control method according to the conventional method under the same rolling conditions as in FIG. Is shown in the graph of FIG. In the conventional roll coolant control method, generally, coolant is applied to the upper and lower work rolls 2a and 2b from the nozzle 6 corresponding to the zone of the portion where the shape deviation of the foil material (rolled material 3) is on the extension side. As a result of such coolant injection, the distribution of the shape deviation in the width direction of the foil material is worse than that in the initial state. The result shown in FIG. You can see from the graph. From this, under the main rolling conditions, it is considered that by injecting the coolant, the plate shape of the injected portion (zone) is in a state of further extending, and the conventional roll coolant It was confirmed that the shape deviation deteriorated compared to the initial state without being able to cope with the control method.

  On the other hand, the result at the time of implementing foil rolling using the control system of the roll coolant according to this invention on the same rolling conditions as Fig.2 (a) was shown in FIG.2 (c). Here, from the result of FIG. 2 (b), under the main rolling conditions, the plate shape is further deformed in the extending direction by performing coolant injection, so that the detected shape becomes the tension direction with respect to the target shape. In this case, the second control parameter for performing the coolant injection is collectively selected for all the nozzles within the plate width, and rolling is performed. As a result, it was confirmed that the distribution of the shape deviation in the width direction was improved as compared with the initial state as shown in FIG.

  In addition, in this rolling condition, in order to reconfirm that it is in the state where the shape of the injected part will become a further extending direction by injecting coolant, in the same rolling condition as FIG. 2 (a) In the roll coolant control system according to the present invention, the first control parameter for performing coolant injection when the detected shape is in the extension direction with respect to the target shape is set for all nozzles within the plate width. Foil rolling was also performed by selecting all at once. As a result, it was confirmed that the distribution of the shape deviation in the width direction was worse than that in the initial state, similarly to the result of FIG.

  As is clear from the above results, under the main rolling conditions, by injecting the coolant onto the work roll, the plate shape of the rolled material 3 corresponding to the injected portion (zone) further becomes the elongation direction. Even under such rolling conditions, by adopting the roll coolant control method according to the present invention, the plate shape is effectively controlled to become the target shape. It was confirmed that it would be possible.

  The exemplary embodiments of the present invention have been described in detail above. However, these are merely examples, and the present invention is not limited to any specific description according to the specific embodiments. It should be understood that this is not to be interpreted.

  For example, in the above-described embodiment, as a rolling mill to which the roll coolant control method according to the present invention is applied, a single-stand type two-stage rolling mill as illustrated in FIG. 1 is exemplified. Of course, the present invention can be applied to a four-high mill, a six-high mill, or various other rolling mills that are generally used in rolling.

  And in the two-high rolling mill illustrated in the above-mentioned embodiment, the roll coolant according to the present invention is controlled by injecting the coolant onto the work rolls 2a and 2b that are in direct contact with the rolled material 3. For example, a roll coolant control system according to the present invention is used to inject coolant onto a work roll or backup roll in a four-high mill, or a work roll, intermediate roll, and backup roll in a six-high mill. By doing so, the shape control of the rolled material 3 can be performed effectively.

  Also, as a coolant injection device for injecting coolant to the work roll and the backup roll, one coolant injection device 5a, 5b is arranged for each work roll 2a, 2b as in the above-described embodiment. However, a plurality of coolant injection devices are arranged for one work roll or backup roll, and the coolant is injected from each of them, or the coolant is applied to both the work roll and the backup roll by one coolant injection device. It is also possible to inject.

  Furthermore, in the present invention, when it is difficult to predict the shape deviation with respect to the target shape by coolant control at the time of foil rolling of the rolled material 3, selection of control parameters is appropriately performed from the beginning of rolling, and the shape deviation is the smallest. After the control parameter is determined, steady foil rolling is continued under the coolant control by the control parameter, and the control by the past control parameter is performed depending on the type of rolling material and rolling conditions. When the first or second control parameter can be selected from the information, it is possible to perform normal foil rolling by setting the selected control parameter to the selected control parameter from the beginning of rolling.

  In addition, although not listed one by one, the present invention is implemented in a mode to which various changes, modifications, improvements and the like are added based on the knowledge of those skilled in the art. It goes without saying that any one of them falls within the scope of the present invention without departing from the spirit of the invention.

It is explanatory drawing which shows roughly an example of the foil rolling process which employ | adopted the roll coolant control system according to this invention. It is a graph which shows distribution of the shape deviation of the rolling material at the time of foil rolling in an actual machine, (a) shows the distribution of the shape deviation at the time of rolling without performing roll coolant control, (b ) Shows the distribution of shape deviation when performing roll coolant control according to the conventional method, and (c) is the distribution of shape deviation when performing roll coolant control according to the present invention. Is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rolling machine 2a Upper work roll 2b Lower work roll 3 Rolled material 4 Shape detector 5a, 5b Coolant injection apparatus 6 Nozzle 7 First setting means 8 Second setting means 9 Parameter switching means 10 Roll coolant control apparatus 11 Coolant control vessel

Claims (4)

A plate shape in a plurality of zones set in the width direction of the rolling material on the outlet side of the rolling roll while arranging a plurality of coolant injection nozzles in the width direction of the rolling roll in the foil rolling machine for foil rolling the plate-shaped rolling material When detecting the shape of the rolling material by controlling the injection of coolant from the plurality of nozzles to the rolling roll based on the detected shape in the plurality of zones.
A first control parameter for injecting coolant from the nozzle corresponding to the elongation detection zone when the shape detected by the shape detector in the plurality of zones is in an extension direction with respect to a target shape; and the detection shape Is set in a tension direction with respect to the target shape, a second control parameter for injecting coolant from the nozzle corresponding to the tension detection zone is set in advance, and the shape is determined according to rolling conditions by the rolling roll. Based on the plate shape detected by the detector, either one of the first and second control parameters is selected to control the injection of coolant from all nozzles within the plate width. A method for controlling roll coolant in a foil rolling machine.   The degree of shape deviation within the plate width when the coolant injection control is performed with the first control parameter, and the degree of shape deviation within the plate width when the coolant injection control is performed with the second control parameter The control method of the roll coolant in the foil rolling machine according to claim 1, wherein the control parameter with the smaller degree of shape deviation is selected, and the rolled material is rolled with the foil rolling machine. . A plate shape in a plurality of zones set in the width direction of the rolling material on the outlet side of the rolling roll while arranging a plurality of coolant injection nozzles in the width direction of the rolling roll in the foil rolling machine for foil rolling the plate-shaped rolling material And a device for controlling the shape of the rolled material by controlling the injection of coolant from the plurality of nozzles to the rolling roll based on the detected shapes in the plurality of zones. ,
A first control parameter for setting a first control parameter for injecting coolant from the nozzle corresponding to the extension detection zone when the shape detected by the shape detector in the plurality of zones is in the extension direction with respect to the target shape. Setting means,
A second control parameter for setting a second control parameter for injecting coolant from the nozzle corresponding to the tension detection zone when the shape detected by the shape detector in the plurality of zones is in a tension direction with respect to a target shape; Setting means,
Based on the plate shape detected by the shape detector according to the rolling conditions by the rolling roll, select one of the first and second control parameters and select all nozzles within the plate width. Selection means for controlling the injection of coolant from
An apparatus for controlling roll coolant in a foil rolling machine. The degree of shape deviation within the plate width when the selection means performs the coolant injection control with the first control parameter, and within the plate width when the coolant injection control is performed with the second control parameter. A function for comparing the degree of the shape deviation in the sheet is selected, a control parameter having a smaller degree of the shape deviation is selected, and the rolled material is foil-rolled by the foil rolling machine. Roll coolant control device for foil rolling machines.

Images