EP3006125A1 - Rolling device and rolling method - Google Patents

Abstract

The present invention relates to a rolling device (1) having at least one roller (4) associated with a multi - zone cooling, the at least one spray bar (2) with a plurality of nozzles (6) for coolant for corresponding to each nozzle (6) locally influencing the Temperature of the roller (4), wherein at least one short-stroke cylinder (8) or a movement mechanism or mechanical movement is provided, which / is arranged and designed so that the spray bar (2) so in and against the feed direction of a web to the at least one roller (4) to be rolled is adjustable relative to the at least one roller (4). Furthermore, the present invention relates to a rolling process, wherein by means of a multi-zone cooling with at least one spray bar (2) with a plurality of nozzles (6) for coolant on at least one roller (4) corresponding to each nozzle (6) the temperature of the roller (4) locally is influenced, wherein the spray bar (2) by means of at least one short-stroke cylinder (8) or a movement mechanism or mechanical movement in and against the feed direction of a web to the at least one roller (4) to be rolled, with respect to the at least one roller is adjustable or adjusted.

Description

The present invention relates to a rolling apparatus according to the preamble of claim 1 and a rolling method according to the preamble of claim 9.

The invention is a further development of a rolling apparatus and a rolling method according to the German patent application DE 10 2011 009 195 A1 ,

Already for the DE 10 2011 009 195 A1 was assumed by known from the prior art in the cold rolling technique, in addition to mechanical actuators such as roll bending, roller displacement, roll pivoting, inter alia, to influence the flat flatness and to use the so-called thermal flatness control. An embodiment of such a conventional arrangement of a rolling device 1 is in the Fig. 2a and 2 B illustrated schematically. In this technique, the cooling and lubricating medium required for the forming process is applied via nozzles 6 mounted parallel to the roll barrel with rolls 4. Each nozzle 6 can be switched on and off individually by appropriate valves. This makes it possible to locally influence the temperature of the roller 4 and locally change their diameter (principle of multi-zone cooling). This in turn affects the geometry of the roll gap and thereby the flatness of the strip. The nozzles 6, which are arranged parallel to the roller 4, are installed in so-called spray bars 2 (usually four), which are fixed in place to the rollers 4 in the rolling stand 3.

In terms of design, the arrangement of the spray bar with the nozzles is a compromise that must take into account the different roll diameters in order to achieve the maximum possible wetting sector of the roll for each situation. The aim is to choose the wetting sector as large as possible in order to be able to exert the greatest possible local influence on the temperature and thus on the diameter. For the economical operation of the cold rolling plants, the largest possible amount of roll grinding is aimed at reducing the operating costs. This means, in the context of this compromise to be found limitation in certain diameter ranges in the optimal wetting and effectiveness of the Kühlmittelbeaufschlagung. The desired effect of local heat dissipation can not be the same or optimized in all diameter ranges. Also, changing the distance from the nozzle exit to the roll surface means that there are changes in the geometry of the fan-like nozzle jet images are available, which also interferes with the differentiation of the nozzles (equal zones).

The disadvantages of this prior art are already with a rolling device and a rolling process according to the DE 10 2011 009 195 A1 fixed, and the present invention has and achieves the goal of further improving this technique.

This object is achieved with a rolling apparatus according to claim 1 and a rolling method according to claim 9.

The invention accordingly provides a rolling apparatus having at least one roller associated with a multi-zone cooling including at least one spray bar having a plurality of nozzles for cooling the respective temperature of the roller locally corresponding to each nozzle, wherein at least one short-stroke cylinder or one Movement mechanism or mechanical movement, in particular a short-stroke movement mechanism or mechanical short-stroke movement is provided, which / is arranged and designed so that the spray bar so in and against the feed direction of a web to the at least one roller to be rolled with respect to which at least one roller is adjustable.

Thus, according to the invention, short-stroke cylinders or movement mechanisms, in particular short-stroke hydraulic cylinders or short-stroke block cylinders, are added to the generic rolling device which can provide movement of the spray bar in or against the transport direction of a material web to be rolled. This movement, which is particularly oriented in the horizontal, allows a higher accuracy of Sprühabstandseinstellung over the entire work area.

1. 1. höhere Genauigkeit der Sprühabstandseinstellung über den Arbeitsbereich;
2. 2. der Arbeitsbereich kann dadurch ausgedehnt werden, dass zugelassen wird, dass unterschiedliche Sprühdrücke an dem Spritzbalken verwendet werden, und dass die Sprühüberlappung noch gesteuert wird; dabei ist zu beachten: Wenn sich der Druck am Spritzbalken erhöht oder senkt, ändert sich das Sprühmuster oder Düsenspritzbild einer einzelnen Düse, und diese Änderung beim Sprühmuster oder Düsenspritzbild ändert auch die Überlappung der Sprühmuster oder Düsenspritzbilder von benachbarten Düsen, was nun durch die erfindungsgemäße Verbesserung kontrolliert werden kann, was einen weiteren Arbeitsbereich des gesamten Systems bei der oder für die Walzvorrichtung ergibt;
3. 3. der Sprühdruck und die Sprühabstandseinstellung können durch einen Algorithmus in Abhängigkeit davon gesteuert werden, in welchem Umfang eine Prozesskühlung erforderlich ist; und
4. 4. die erfindungsgemäße Verbesserung hat weitere Vorteile, wenn sehr geringe Kühlmittelströmungen verwendet werden, da sie es gestattet, dass der Druck reduziert wird, während eine vollständige Abdeckung des Arbeitsbereiches beibehalten wird.

The improvement according to the invention of the ultra-high-resolution spraying, in particular according to the DE 10 2011 009 195 A1 by the use of short-stroke cylinders or movement mechanics or mechanical movements, preferably each with short stroke, which can provide for an additional preferably horizontal movement of the spray bar, compared to the technique according to the DE 10 2011 009 195 A1 the following advantages:

1. 1. higher accuracy of spray gap adjustment over the work area;
2. 2. the work area can be extended by allowing different spray pressures to be used on the spray bar and still controlling the spray overlap; Note: As the pressure on the spray bar increases or decreases, the spray pattern or nozzle spray pattern of a single nozzle changes Change in spray pattern or nozzle spray pattern also alters the overlap of the spray patterns or nozzle spray patterns of adjacent nozzles, which can now be controlled by the improvement of the invention, resulting in a wider working range of the entire system in or for the rolling apparatus;
3. 3. the spray pressure and spray gap setting can be controlled by an algorithm depending on the extent to which process cooling is required; and
4. 4. The improvement of the present invention has further advantages when using very low coolant flows since it allows the pressure to be reduced while maintaining full coverage of the work area.

In the case of the rolling apparatus according to the invention, it is preferred if the feed direction of a material web to the at least one roller is at least substantially horizontal.

A further preferred embodiment is that at least one pair of short-stroke cylinders or movement mechanisms or mechanical movements is provided, wherein a short-stroke cylinder or a movement mechanism / mechanical movement of the pair below the material web feed and a short-stroke cylinder or a movement mechanism / mechanical movement of the pair is arranged above the material web feed.

Furthermore, a controller may be provided which is designed, on the one hand, to control the distance of the spray bar from the at least one roller by controlling any short-stroke cylinders or movement mechanics or mechanical movement and, on the other hand, the pressure of the nozzles Coolant coordinated to control so that desired nozzle spray images are set on the at least one roller.

Furthermore, it may preferably be further provided that the at least one spray bar is adjustable and controllable so as to keep the distance of the spray bar or nozzles from the roller at least substantially constant, even with different roller diameters.

For different work roll diameters, it can be done by setting, e.g. Pivoting the spray bar, the distance to the roller are kept at least approximately constant.

Preferably, the at least one spray bar for setting is guided in rotation or pivotally and / or linearly guided.

More preferably, a controller may be provided which is designed to adjust the at least one spray bar relative to the associated roller so that a predetermined distance of spray bars or nozzles of the respective roller is set. It still can Further preferably, a path measuring system may be provided to determine, either directly or indirectly, the actual distance of a spray bar from a roll continuously, at regular or irregular intervals or on demand, and to continuously, at regular or irregular intervals or upon request, direct that control to the actual distance designed to control the setting of the at least one spray bar relative to the associated roller so that the predetermined distance of spray bars or nozzles is set by the affected roller.

In another preferred embodiment, it is provided that at least one in particular hydraulic actuating cylinder is provided for adjusting the at least one spray bar.

However, it may be preferred that the rolling device is a flat rolling mill or one with a 4-high or 6-high rolling stand configuration.

It is further preferred if the nozzles on the at least one spray bar are designed to produce fan-shaped nozzle spray patterns of coolant.

In the rolling method according to the invention, the temperature of the roller is locally influenced by means of a multi-zone cooling with at least one spray bar with a plurality of nozzles for coolant at least one roller corresponding to each nozzle, the spray bar by means of at least one short-stroke cylinder or a movement mechanism or mechanical movement in and opposite to the feed direction of a material web to the at least one roller, to be rolled, with respect to the at least one roller is adjustable or adjusted.

It can be further provided with preference that the at least one spray bar is controlled and employed that the distance of spray bars or nozzles from the roller is kept at least substantially constant even with different roller diameters, so that even with different roller diameters equal or optimized admission is ensured with the cooling medium. The can preferably be further developed in that in particular the at least one spray bar for adjusting by means of at least one particular hydraulic actuating cylinder is rotationally guided or pivotally or linearly guided.

Alternatively or additionally, it is preferred if the actual distance of a spray bar from a roll is determined directly or indirectly by means of a displacement measuring system and is sent to a controller which causes a setting of the at least one spray bar, so that a predetermined distance of spray bars or nozzles from the affected roller is set.

Yet another preferred embodiment is that, on the one hand, the distance of the spray bar from the at least one roller controlled by any existing short-stroke cylinder or movement mechanics or mechanical movements and on the other hand, the pressure of the nozzle supplied coolant coordinated with each other so that desired nozzle spray images the at least one roller can be adjusted.

Further preferred and / or advantageous embodiments of the invention and their individual aspects emerge from the combinations of individual claims and the entire present application documents.

• Fig. 1 a in einer schematischen Prinzipskizze ein Ausführungsbeispiel einer Walzvorrichtung bei maximalem Abstand der Walzen zeigt,
• Fig. 1b in einer schematischen Prinzipskizze ein Ausführungsbeispiel einer Walzvorrichtung bei minimalem Abstand der Walzen zeigt, und
• Fig. 2a, b in einer schematischen Prinzipskizze ein Ausführungsbeispiel einer Walzvorrichtung nach dem Stand der Technik entsprechend einer Frontansicht und in einer Draufsicht zeigen.

The invention will be explained in more detail by way of example with reference to an exemplary embodiment with reference to the drawing, in which

• Fig. 1 a shows a schematic diagram of an embodiment of a rolling device with maximum spacing of the rolls,
• Fig. 1b shows in a schematic schematic diagram of an embodiment of a rolling device with minimal spacing of the rollers, and
• Fig. 2a . b in a schematic schematic diagram of an embodiment of a rolling device according to the prior art according to a front view and in a plan view.

With reference to the embodiment and application example described below and illustrated in the drawings, the invention will be explained only by way of example, i. it is not limited to this embodiment and application example or to the feature combinations within this embodiment and application example. Process and device features result analogously also from device or process descriptions.

Individual features that are indicated and / or illustrated in connection with a specific embodiment, are not limited to this embodiment or the combination with the other features of this embodiment, but may in the context of the technically possible, with any other variants, even if they are in are not treated separately.

The same reference numerals in the individual figures and illustrations of the drawing designate the same or similar or the same or similar components. Based on the representations in the drawing, those features are also clear, which are not provided with reference numerals, regardless of whether such features are described below or not. On the other hand, features that are included in the present description but are not visible or illustrated in the drawing will be readily understood by those skilled in the art.

In the Fig. 1a and 1b an embodiment of a rolling device 1 are shown in schematic schematic diagrams.

The present invention is based on the known prior art according to the example in the Fig. 2a and 2 B , which have been described above in the introduction and are therefore not treated separately here, to circumvent the problem described above by the spray bars 2 are mounted in the rolling stand 3 or framework so that they are adjustable and according to the current diameters of Rollers 4 can be positioned. Thus, in a multi-zone cooling with engagable spray bars is achieved that even with different roller diameters equal or optimized admission to the cooling medium is ensured. An embodiment of the invention is shown schematically in the Fig. 1a and 1b shown.

One possibility is to attach the spray bar 2 pivotally in the frame 3 and, for example, by a cylinder 5 and a position measuring system to position the spray bars 2 (in the Fig. 1a and 1b a variant with four spray bars 2 is shown, but the invention is not limited to this exact number and arrangement). The spray bars 4 carry a plurality of nozzles 6 for generating fan-like employed nozzle spray images 7 of coolant, which may preferably also be a lubricant at the same time.

Besides these in the Fig. 1a and 1b However, solutions can be implemented arbitrarily other principles that are suitable for positioning and the expert can now select to the knowledge of the present invention readily. Also, the movement does not necessarily have to be rotational about a pivot point. Also linearly guided spray bars can be used in the context of this invention. The application is conceivable, for example, for all flat rolling mills. Further, it is preferred but not limiting to employ 4-high or 6-high rolling stand configurations in the rolling apparatus 1.

The Fig. 1a and 1b illustrate further features and designs in the context of the corresponding embodiment, which the person skilled in the field of rolling devices without further explanation easily without any particular regard to the disclosure of the present can take the affected cooling theme of the graphic / pictorial representation alone without the need for descriptive explanations would be required.

In particular, the rolling device 1 according to the Fig. 1a and 1b at least one roller 4, which is associated with a multi-zone cooling, the at least one spray bar 2 with a plurality of nozzles 6 for coolant corresponding to each nozzle 6 locally influencing the temperature of the roller 4, wherein at least one short-stroke cylinder 8 or a movement mechanism or mechanical movement, such as in particular a short-stroke movement mechanism or mechanical short-stroke movement is provided, which / is arranged and designed so that the spray bar 2 so in and against the feed direction of a web to the at least one roller 4, to be rolled with respect to which at least one roller 4 is adjustable.

In the embodiments shown so short-stroke cylinder 8, movement mechanics or mechanical movement, in particular short-stroke hydraulic cylinder or short-stroke block cylinder, added to the generic rolling device 1, the movement of the spray bar 2 in or against the transport direction of a material web to be rolled according to the arrow in the Fig. 1a and 1b can provide. This movement, which is particularly oriented in the horizontal, allows a higher accuracy of Sprühabstandseinstellung over the entire work area.

1. 1. höhere Genauigkeit der Sprühabstandseinstellung über den Arbeitsbereich;
2. 2. der Arbeitsbereich kann dadurch ausgedehnt werden, dass zugelassen wird, dass unterschiedliche Sprühdrücke an dem Spritzbalken 2 verwendet werden, und dass die Sprühüberlappung noch gesteuert wird; dabei ist zu beachten: Wenn sich der Druck am Spritzbalken 2 erhöht oder senkt, ändert sich das Sprühmuster oder Düsenspritzbild 7 einer einzelnen Düse 6, und diese Änderung beim Sprühmuster oder Düsenspritzbild 7 ändert auch die Überlappung der Sprühmuster oder Düsenspritzbilder 7 von benachbarten Düsen 6, was nun durch die erfindungsgemäße Verbesserung kontrolliert werden kann, was einen weiteren Arbeitsbereich des gesamten Systems bei der oder für die Walzvorrichtung 1 ergibt;
3. 3. der Sprühdruck und die Sprühabstandseinstellung können durch einen Algorithmus in Abhängigkeit davon gesteuert werden, in welchem Umfang eine Prozesskühlung erforderlich ist; und
4. 4. die erfindungsgemäße Verbesserung hat weitere Vorteile, wenn sehr geringe Kühlmittelströmungen verwendet werden, da sie es gestattet, dass der Druck reduziert wird, während eine vollständige Abdeckung des Arbeitsbereiches beibehalten wird.

The improvement of ultra-high-resolution spraying in particular according to DE 10 2011 009 195 A1 by the use of short-stroke cylinders 8, movement mechanics or mechanical movement, in particular with short stroke, which can provide for an additional preferably horizontal movement of the spray bar 2, compared to the technique according to the DE 10 2011 009 195 A1 the following advantages:

1. 1. higher accuracy of spray gap adjustment over the work area;
2. 2. the working area can be extended by allowing different spray pressures to be used on the spray bar 2 and still controlling the spray overlap; Note that as the pressure on the spray bar 2 increases or decreases, the spray pattern or nozzle spray pattern 7 of a single nozzle 6 changes, and this change in the spray pattern or nozzle spray pattern 7 also alters the overlap of the spray patterns or nozzle spray images 7 from adjacent nozzles 6. which can now be controlled by the improvement according to the invention, which results in a further working range of the entire system in or for the rolling apparatus 1;
3. 3. the spray pressure and spray gap setting can be controlled by an algorithm depending on the extent to which process cooling is required; and
4. 4. The improvement of the present invention has further advantages when using very low coolant flows since it allows the pressure to be reduced while maintaining full coverage of the work area.

In the rolling device 1 according to the embodiments in the Fig. 1a and 1b is preferred if the feed direction of a material web to the at least one roller 4 is at least substantially horizontal. In the embodiments according to the Fig. 1a and 1b the short-stroke cylinders 8 are provided in pairs, wherein a short-stroke cylinder 8 of each pair below the material web feed and a short-stroke cylinder 8 of each pair is arranged above the material web feed. Furthermore, in the in the Fig. 1a and 1b illustrated embodiments, a controller provided which is designed to control the one hand, the distance of the spray bar 2 of the at least one roller 4 by controlling any existing short-stroke cylinder 8 and on the other hand, the pressure of the nozzles 6 supplied coolant coordinated with each other so that desired nozzle spray images 7 are set at the at least one roller 4. Each short-stroke cylinder 8 is here representative of a more general movement mechanics or mechanical movement, such as in particular a short-stroke movement mechanics or mechanical short-stroke movement.

Of particular advantage, the present invention is / for rolling aluminum, but without being limited to this application. Furthermore, it is advantageous that the maintenance of rolling devices is reduced by the present invention over conventional types according to the prior art, the exemplary and schematically in the Fig. 2a and 2 B is clarified, to which reference has already been made and which is understandable to those skilled in the field of rolling devices without further explanation easily particular with respect to the disclosure of the presently concerned cooling issue.

The invention can be realized in a rolling device in an advantageous manner that is kept at least substantially constant in particular different working roll diameters by, for example, pivoting or generally hiring the spray bar, the distance of the respective nozzles to the roller.

The in the Fig. 1a and 1b contained dimensions and other information provide only exemplary size information or details for execution of the in Fig. 1a and 1b shown embodiment; the invention is not limited to these sizes and other design information and not on resulting relations.

The invention is illustrated by way of example only and not by way of example in the description and the drawing, but includes all variations, modifications, substitutions and combinations that the skilled person the present documents in particular in the context of the claims and the general representations in the introduction This description and the description and drawings of the embodiment and can combine with his expert knowledge and the prior art. In particular, all individual features and design options of the invention can be combined.

Claims (10)

Rolling device (1) with at least one roller (4), which is associated with a multi-zone cooling, the at least one spray bar (2) with a plurality of nozzles (6) for coolant to the corresponding each nozzle (6) locally influencing the temperature of the roller (4 contains)
characterized,
in that at least one short-stroke cylinder (8) or a movement mechanism or mechanical movement, in particular a short-stroke movement mechanism or mechanical short-stroke movement, is provided, which is arranged and designed such that the spray bar (2) engages in and against it the feeding direction of a material web to the at least one roller (4) to be rolled, with respect to the at least one roller (4) is adjustable. Rolling device (1) according to claim 1,
characterized,
in that the feed direction of a material web to the at least one roller (4) is at least substantially horizontal. Rolling device (1) according to claim 1 or 2,
characterized,
in that at least one pair of short-stroke cylinders (8) or movement mechanisms or mechanical movements, in particular short-stroke movement mechanisms or short-stroke mechanical movements, is provided, wherein a short-stroke cylinder (8) or a movement mechanism or mechanical movement of the pair below the material web supply and a short-stroke cylinder (8) or a movement mechanism or mechanical movement of the pair is arranged above the material web feed. Rolling device (1) according to one of the preceding claims,
characterized,
that a control is provided which is adapted, on the one hand the distance of the spray bar (2) of the at least one roller (4) by controlling any existing short-stroke cylinder (8) or moving mechanisms or mechanical movements, and on the other hand the pressure of (the nozzles 6) supplied coolant coordinated with each other so controlled that desired nozzle spray images (7) on the at least one roller (4) are set. Rolling device (1) according to one of the preceding claims,
characterized,
that the at least one spray bar (2) can be adjusted and thus controlled in order to keep the distance of the spray bar (2) or nozzles (6) from the roller (4) at least substantially constant, even with different roller diameters, and
in particular that the at least one spray bar (2) is rotatably guided or pivotable for setting and / or that the at least one spray bar (2) is guided linearly for setting. Rolling device (1) according to one of the preceding claims,
characterized,
in that a controller is provided which is designed to set the at least one spray bar (2) relative to the associated roller (4) in such a way that a predetermined distance of spray bars (2) or nozzles (6) from the relevant roller (4) is set is. Rolling device (1) according to claim 6,
characterized,
that a path measuring system is provided to continuously, to directly or indirectly detect the actual distance of a spray bar (2) from a roll (4) in regular or irregular time intervals or on request, and this actual distance continuously, at regular or irregular time intervals or Request to the controller, which is designed to control the hiring of the at least one spray bar (2) relative to the associated roller (4) so that the predetermined distance from the spray bar (2) or nozzles (6) of the roller concerned (4) is set. Rolling device (1) according to one of the preceding claims,
characterized,
in that at least one in particular hydraulic actuating cylinder (5) is provided for adjusting the at least one spray bar (2), and / or
that the rolling device (1) is a flat rolling mill, or has a 4-high or 6-high rolling mill configuration, and / or
that the nozzles (6) to the at least one spray bar (2) to produce fan-like jets spray images (7) of coolant designed. Rolling method, wherein the temperature of the roller (4) is locally influenced by means of a multi-zone cooling with at least one spray bar (2) with a plurality of nozzles (6) for coolant at at least one roller (4) corresponding to each nozzle (6),
characterized,
in that the spray bar (2) is moved into and counter to the feed direction of a material web to the at least one roller (4) by means of at least one short-stroke cylinder (8) or a movement mechanism or mechanical movement, in particular a short-stroke movement mechanism or mechanical short-stroke movement. to be rolled, with respect to the at least one roller is adjustable or adjusted. Rolling method according to claim 9,
characterized,
the at least one spray bar (2) is controlled and turned on, that the distance from spray bars (2) or nozzles (6) of the roller (4) is kept constant even with different roll diameters, at least substantially so that even with different roll diameters an equally good or optimized impingement with the cooling medium is ensured, and that in particular that the at least one spray bar (2) for adjusting by means of at least one particular hydraulic actuating cylinder (5) is rotationally guided or pivotally or linearly guided, and / or that the actual Distance of a spray bar (2) of a roller (4) by means of a displacement measuring directly or indirectly determined and given to a controller that causes a hiring of at least one spray bar (2), so that a predetermined distance from the spray bar (2) or nozzles (6) is adjusted by the relevant roller (4), and / or
in that on the one hand the distance of the spray bar (2) from the at least one roller (4) is controlled by controlling any existing short-stroke cylinder (8) or movement mechanics or mechanical movement and on the other hand the pressure of the coolant supplied to the nozzles (6) is coordinated, that desired nozzle spray patterns (7) are set on the at least one roller (4).

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