WO2012038479A1 - Continuous furnace for an in particular metallic strip - Google Patents
Continuous furnace for an in particular metallic strip Download PDFInfo
- Publication number
- WO2012038479A1 WO2012038479A1 PCT/EP2011/066451 EP2011066451W WO2012038479A1 WO 2012038479 A1 WO2012038479 A1 WO 2012038479A1 EP 2011066451 W EP2011066451 W EP 2011066451W WO 2012038479 A1 WO2012038479 A1 WO 2012038479A1
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- WO
- WIPO (PCT)
- Prior art keywords
- continuous furnace
- belt
- sensor
- roller
- impact device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/145—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving along a serpentine path
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path
- F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path being carried by a conveyor
- F27B9/2407—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path being carried by a conveyor the conveyor being constituted by rollers (roller hearth furnace)
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories or equipment specially adapted for furnaces of these types
- F27B9/40—Arrangements of controlling or monitoring devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangement of monitoring devices; Arrangement of safety devices
Definitions
- the invention relates to a continuous furnace for a particular metallic strip with at least one leading through the continuous furnace furnace roller, with a continuous furnace at least partially provided sensor for determining the position of the belt in the continuous furnace, which sensor is spaced from the band, and at least one in the strip running direction before and / or after the sensor arranged impacting means for protecting the sensor from a tape contact before a tape contact with the tape performed, wherein the impacting means is arranged in relation to the sensor at least partially spaced closer to the tape.
- tape touches can result in significant material loads, so that a material failure of the impact device can not be excluded.
- a defective impact device does not ensure safe protection of the sensor, a stable continuous furnace can thus not be created.
- the continuous furnace should be stable and inexpensive.
- the impacting device has at least one roller for belt contact driven by a drive in accordance with the direction of travel of the belt. If the impact device has at least one roller for belt contact driven by a drive corresponding to the direction of travel of the belt, the risk of belt damage can be reduced in a structurally simple manner. Namely, cause unwanted tape movements of the tape, which is guided by means of at least one furnace roller through the continuous furnace, only to impinge on a corresponding driven according to the tape direction roller, so that held with a reduced relative speed between the roller and tape any damage low or excluded can be. In addition, by a first rotating role already their starting torque is overcome, so that when a band touch the force loads on the impact device can be reduced.
- the impact device according to the invention therefore not only allows a stable continuous furnace, but can also reduce or eliminate the risk of material damage to the belt, whereby the continuous furnace over the prior art is particularly distinguished.
- the impact device according to the invention is comparatively simple to implement constructively, which can provide a cost-effective continuous furnace.
- the roller runs along with the tape, in which case the peripheral speed of the roller need not necessarily coincide with the tape speed.
- the risk of belt damage can be further reduced and the stability of the continuous furnace can be further improved if the circumferential speed of the roller of the impactor corresponds to the belt speed of the belt.
- the risk of cracking can be reduced by this special rotation of the role in thin-walled bands.
- the rollers take the tape at its own belt speed, which can avoid additional tensile, stowage or other loads on the belt.
- the circumferential speed of the roller of the impact device corresponds to that of the peripheral speed of the previously arranged in the belt running direction furnace roller.
- an already existing and usually extremely complex speed control of furnace rollers can be used to equalize the speed control of the impact device.
- the impact device according to the invention offers a cost-effective alternative for retrofitting purposes of existing continuous furnaces, because only the speed of the respective furnace roller has to be tapped for control purposes. It goes without saying that the circumferential speed of the preceding furnace roll can also be provided by other means. Data lines, interfaces of controllers and measuring devices are examples of such possibilities.
- the roller of the impacting device has a drive independent of the other furnace rollers, then a uniform thorough heating of the roller can always be ensured.
- Adverse changes in the dimensions of the role, in particular a bowl of this, can be excluded in a simple manner, which can provide a comparatively stable continuous furnace.
- the durability of the rollers and thus the stability of the continuous furnace can be further improved if water cooling is provided for cooling the roller of the impact device.
- a water cooling of the sensor for particularly reproducible measurement results - even at different temperature conditions in the continuous furnace - provide, which can provide a universally applicable continuous furnace.
- a cobalt-based metal coating particularly CoCrAlY, has been found to be advantageous in the role of the impactor. Extremely high resistance of the roll to adverse environmental conditions in the oven and low tendency to scratch on the belt can characterize this coating.
- Fig. 1 is a schematic and torn side view of a portion of the continuous furnace and
- Fig. 2 is an enlarged sectional view of the impact device according to the invention. Way to carry out the invention
- a continuous furnace 1 is shown in a schematic view as an exemplary embodiment, which is shown up and torn off.
- a continuous furnace 1 can be understood to mean any furnace through which a belt 2 is moved, whether pulled, pushed or otherwise moved.
- a continuous furnace 1 can also be designed as a jet tube furnace, which has not been shown in detail.
- a metallic strip 2, in particular a steel strip is now carried out via a castor frame 5 having a plurality of furnace rolls 3 and 4.
- the furnace rollers 3 and 4 are set according to the tape speed of each drive 6 via a drive shaft 6 'rotating in motion, the drives are arranged outside of the continuous furnace.
- a sensor 7 is further arranged, which makes an inductive detection of the position of the performed and tensioned tape 2 in the continuous furnace 1 with its not shown transmitting and receiving coil.
- the transmitting and receiving coil can be arranged in a sensor housing or in different housings.
- the sensor 7 also has a comparatively brittle ceramic shell 8.
- an impact device 10 is provided in the belt running direction 9 before and after the sensor 7. As shown in Fig. 1, now the impactor 10 carries the kinematic energy of the belt movement of the belt 2, and thus prevents the belt 2 can bulge in the direction of the sensor 7.
- the sensor 7 is further spaced from the belt with respect to the impact devices 10 - in other words, the impact device 10 is at least partially spaced closer to the belt 2 in relation to the sensor 7.
- the senor 7 is spaced further away from the belt 2 with respect to the impact devices 10 - in other words, the impact device 10 is arranged at least partially closer in the direction of the belt 2 being carried out in comparison to the sensor 7.
- the impact device 10 is normally contactless with respect to the continuous belt 2. However, to avoid damaging the tape 2 due to eventual len impact with the impactor 10, preferably to exclude such damage, the impactor 10 is carried out as a set in rotation roller 1 1.
- the impactor 10 has a driven by a drive 12 corresponding to the tape running direction 9 roller 1 1 for tape contact, which has the direction of rotation 1 1 '.
- the roller 1 1 therefore already rotates before a possible impact of the belt 2, so that it comes with a touch of tape 2 with roller 1 1 to a reduced relative speed and thus reduced friction. Any resulting notches can thus be reduced or eliminated, thereby avoiding scratches in the strip surface.
- the continuous furnace 1 according to the invention can therefore essentially rule out band damage.
- the force loads on the roller 1 1 can be reduced because this roller 1 1 is already in the impact during the impact, so that a stable continuous furnace 1 can be ensured.
- the drive 12 is connected via a drive shaft 12 'to the roller 1 1.
- Such a drive 6 or 12 can be understood, for example, as a motor, as a motor together with a gear unit or as another device for rotating the rollers 3, 4 or 11, which has not been shown for the sake of clarity.
- a sensor 7 and impact devices 10 are likewise provided in order to be able to detect measurement data for any side of the belt 2.
- the rollers 1 1 also rotate here in accordance with the direction of tape travel 9 and have a corresponding direction of rotation 1 1 ", but it is also conceivable to provide the transmitting and receiving coil on opposite sides of the band in each case, so that the sensor 7 is on both sides of the band located.
- the rollers 11 can also be rotated in accordance with the band speed of the belt 2 prevailing in their area. For this purpose must only the peripheral speed of the roller 1 1 of the Anpralleinnchtung 10 of the belt speed of the belt 2 correspond. By means of sensors, not shown, this belt speed can now be measured or deduced therefrom and then used to control the drive 12 of the rollers 11.
- the peripheral speed of the roller 1 1 of the impact device 10 of the peripheral speed of the previously arranged in the strip running direction furnace roller 4 is set accordingly.
- the drive 12 can be used. It is also conceivable for the drive 12 of the rollers 1 1 to use the drive 6 of the oven roller 4 - only a gear ratio in the case of different diameters of the rollers 6 and 1 1, which is the case of FIG. 1, would be for the rollers. 1 1 to provide corresponding to the peripheral speeds of the rollers 4 and 1 1, which is not shown.
- the independent of the other furnace rollers 3 and 4 drive 12 may also be useful that in the case of a stoppage of the belt 2, the rollers 1 1 are still driven.
- the rollers 1 1 are still driven.
- a water cooling 13 can be seen, which is used for cooling the rollers 1 1.
- the rollers 1 1 on a cavity 14, can be passed through the water 15 as a coolant.
- the sensors can also be cooled with the water cooling system 13, as well as water is passed through the jacket as a coolant, which has not been shown in detail.
- roller 1 1 of the impact device 10 is provided with a metal coating 16 based on cobalt, in particular CoCrAIY, wherein the surface of the roller 1 1 can be polished and brushed.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
Durchlaufofen für ein insbesondere metallisches Band Continuous furnace for a particular metallic band
Technisches Gebiet Technical area
Die Erfindung betrifft einen Durchlaufofen für ein insbesondere metallisches Band mit mindestens einer das Band durch den Durchlaufofen führenden Ofenrolle, mit einem im Durchlaufofen wenigstens teilweise vorgesehenen Sensor zur Bestimmung der Lage des Bands im Durchlaufofen, welcher Sensor vom Band beabstandet angeordnet ist, und mit wenigstens einer in Bandlaufrichtung vor und/oder nach dem Sensor angeordneten Anpralleinrichtung zum Schutz des Sensors vor einer Bandberührung vor einer Bandberührung mit dem durchgeführten Band, wobei die Anpralleinrichtung in Relation zum Sensor wenigstens teilweise näher zum Band beabstandet angeordnet ist. The invention relates to a continuous furnace for a particular metallic strip with at least one leading through the continuous furnace furnace roller, with a continuous furnace at least partially provided sensor for determining the position of the belt in the continuous furnace, which sensor is spaced from the band, and at least one in the strip running direction before and / or after the sensor arranged impacting means for protecting the sensor from a tape contact before a tape contact with the tape performed, wherein the impacting means is arranged in relation to the sensor at least partially spaced closer to the tape.
Stand der Technik State of the art
Um ein metallisches Blechband in einen Durchlaufofen einfädeln zu können, ist es aus dem Stand der Technik bekannt (DE19619049A1 ), zur Führung des ungespannten Bands im Durchlaufofen Rollen vorzusehen, denen Einführhilfen bzw. Anpralleinrichtungen zugeordnet sind. Weiter weist dieser Durchlaufofen einen Sensor auf, der den Abstand zwischen Band und Rolle misst, um Bandberührungen des durchgeführten bzw. gespannten Bands mit den Rollen zu vermeiden. Dem Sensor selbst ist keine Anpralleinrichtung zugeordnet. In order to be able to thread a metallic sheet-metal strip into a continuous furnace, it is known from the prior art (DE19619049A1) to provide rollers for guiding the unstressed strip in the continuous furnace, to which insertion aids or impact devices are assigned. Furthermore, this continuous furnace has a sensor which measures the distance between the belt and roller to avoid tape contact of the carried or tensioned belt with the rollers. The sensor itself is not assigned an impact device.
Außerdem ist es aus dem Stand der Technik bekannt, vor und nach einem Sensor zur Bandlageerkennung eine Anpralleinrichtung vorzusehen, um diesen Sensor gegenüber Beschädigungen zu schützen. Diese Anpralleinrichtung trägt zu diesem Zweck Bandbewegungen des durchgeführten Bands ab, bevor diese Bewegungen zu einer unerwünschten Sensorberührung bzw. in Folge dessen zu einer Sensorbeschädigung führen können. Zu diesem Zweck wird die Anpralleinrichtung im Vergleich zum Sensor, der gegenüber dem durchlaufenden Band beabstandet angeordnet ist, näher zum durchlaufenden Band angeordnet vorgesehen. Zwar kann damit im Wesentlichen eine Sensorbeschädigung vermieden werden, jedoch führen diese Bandberührungen mit der Anpralleinrichtung nachteilig zu Beschädigungen der Bandoberfläche. Bekannte Durchlauföfen können daher eine beschädigungsfreie Bandführung, insbesondere im Falle von hochfesten Stahlbändern mit deren vergleichsweise häufigen Bandbewegungen, nicht gewährleisten. Außerdem können Bandberührungen erhebliche Materialbelastungen zur Folge haben, so dass auch ein Materialversagen der Anpralleinrichtung nicht ausgeschlossen werden kann. Eine defekte Anpralleinrichtung gewährleistet keinen sicheren Schutz des Sensors, ein standfester Durchlaufofen kann somit nicht geschaffen werden. Auf eine Anpralleinrichtung zu verzichten und stattdessen den Sensor weiter vom Band entfernt anzuordnen, stellte sich aufgrund vergleichsweise stark abfallender Sensorempfindlichkeit als nicht zielführend heraus, sodass der Sensor in jenem Bereich, in dem eine Gefahr zur Bandberührung besteht, angeordnet werden muss. Moreover, it is known from the prior art to provide an impact device before and after a sensor for detecting the band position, in order to protect this sensor against damage. This impact device contributes to this Purpose tape movements of the tape performed before these movements can lead to an unwanted sensor touch or as a result, to a sensor damage. For this purpose, the impactor is provided closer to the continuous belt as compared to the sensor which is spaced from the continuous belt. Although this essentially eliminates sensor damage, this band contact with the impact device disadvantageously leads to damage to the strip surface. Known continuous ovens can therefore not ensure a damage-free tape guide, especially in the case of high-strength steel strips with their relatively frequent tape movements. In addition, tape touches can result in significant material loads, so that a material failure of the impact device can not be excluded. A defective impact device does not ensure safe protection of the sensor, a stable continuous furnace can thus not be created. To dispense with an impact device and instead to place the sensor farther away from the belt turned out to be impractical due to comparatively strongly decreasing sensor sensitivity, so that the sensor has to be arranged in the region in which there is a risk of belt contact.
Darstellung der Erfindung Presentation of the invention
Es ist daher die Aufgabe der Erfindung, einen Durchlaufofen mit einem Sensor der eingangs geschilderten Art derart auf konstruktiv einfache Weise zu verbessern, dass damit die Gefahr von Bandbeschädigungen vermindert werden kann. Außerdem soll der Durchlaufofen standfest und kostengünstig sein. It is therefore an object of the invention to improve a continuous furnace with a sensor of the type described in a structurally simple manner, so that the risk of band damage can be reduced. In addition, the continuous furnace should be stable and inexpensive.
Die Erfindung löst die gestellte Aufgabe dadurch, dass die Anpralleinrichtung wenigstens eine von einem Antrieb entsprechend der Bandlaufrichtung angetriebene Rolle zur Bandberührung aufweist. Weist die Anpralleinrichtung wenigstens eine von einem Antrieb entsprechend der Bandlaufrichtung angetriebene Rolle zur Bandberührung auf, kann auf konstruktiv einfache Weise die Gefahr einer Bandbeschädigung verringert werden. Es führen nämlich unerwünschte Bandbewegungen des Bands, das mit Hilfe von wenigstens einer Ofenrolle durch den Durchlaufofen geführt ist, lediglich zu einem Auftreffen auf eine entsprechend der Bandlaufrichtung angetriebenen Rolle, so dass mit einer verminderten Relativgeschwindigkeit zwischen Rolle und Band eventuelle Beschädigungen gering gehalten bzw. ausgeschlossen werden können. Hinzu kommt, dass durch eine sich zunächst drehende Rolle bereits deren Anlaufmoment überwunden ist, so dass bei einer Bandberührung die Kraftbelastungen auf die Anpralleinrichtung verringert werden können. Selbst bei häufigen Bandberührungen können Materialversagen an der Anpralleinrichtung und damit Sensorbeschädigungen ausgeschlossen werden. Die erfindungsgemäße Anpralleinrichtung ermöglicht daher nicht nur einen standfesten Durchlaufofen, sondern kann auch die Gefahr von Materialbeschädigungen am Band vermindern bzw. ausschließen, wodurch sich der Durchlaufofen gegenüber dem Stand der Technik besonders auszeichnet. Außerdem ist die erfindungsgemäße Anpralleinrichtung vergleichsweise einfach konstruktiv zu realisieren, was für einen kostengünstigen Durchlaufofen sorgen kann. Im Allgemeinen wird noch erwähnt, dass unter entsprechend der Bandlaufrichtung angetriebener Rolle verstanden werden kann, dass die Rolle mit dem Band mitläuft, wobei hier die Umfangsgeschwindigkeit der Rolle nicht zwangsweise mit der Bandgeschwindigkeit übereinstimmen muss. The invention achieves the stated object in that the impacting device has at least one roller for belt contact driven by a drive in accordance with the direction of travel of the belt. If the impact device has at least one roller for belt contact driven by a drive corresponding to the direction of travel of the belt, the risk of belt damage can be reduced in a structurally simple manner. Namely, cause unwanted tape movements of the tape, which is guided by means of at least one furnace roller through the continuous furnace, only to impinge on a corresponding driven according to the tape direction roller, so that held with a reduced relative speed between the roller and tape any damage low or excluded can be. In addition, by a first rotating role already their starting torque is overcome, so that when a band touch the force loads on the impact device can be reduced. Even with frequent tape touches material failure at the impact device and thus sensor damage can be excluded. The impact device according to the invention therefore not only allows a stable continuous furnace, but can also reduce or eliminate the risk of material damage to the belt, whereby the continuous furnace over the prior art is particularly distinguished. In addition, the impact device according to the invention is comparatively simple to implement constructively, which can provide a cost-effective continuous furnace. In general, it should be mentioned that under the driven direction of the tape running direction, it can be understood that the roller runs along with the tape, in which case the peripheral speed of the roller need not necessarily coincide with the tape speed.
Die Gefahr einer Bandbeschädigung kann noch weiter reduziert und die Standfestigkeit des Durchlaufofens noch weiter verbessert werden, wenn die Umfangsgeschwindigkeit der Rolle der Anpralleinrichtung der Bandgeschwindigkeit des Bands entspricht. Außerdem kann durch diese besondere Rotation der Rolle bei dünnwandigen Bändern die Rissgefahr reduziert werden. Die Rollen nehmen nämlich das Band mit dessen eigenen Bandgeschwindigkeit mit, was zusätzliche Zug-, Stau- chungs- oder andere Belastungen des Bands vermeiden kann. Um den konstruktiven Aufwand zum Antrieb der Rolle der Anpralleinrichtung zu verringern, kann vorgesehen sein, dass die Umfangsgeschwindigkeit der Rolle der Anpralleinrichtung jener der Umfangsgeschwindigkeit der in Bandlaufrichtung vorher angeordneten Ofenrolle entspricht. Außerdem kann damit eine bereits bestehende und meist äußerst komplexe Drehzahlregelung von Ofenrollen verwendet werden, um die Drehzahlregelung der Anpralleinrichtung anzugleichen. Somit kann ein kostengünstiger Durchlaufofen geschaffen werden. Außerdem bietet sich die erfindungsgemäße Anpralleinrichtung als kostengünstige Alternative für Nachrüstzwecke bestehender Durchlauföfen an, weil lediglich die Drehzahl der betreffenden Ofenrolle zu Steuerungszwecken abgegriffen werden muss. Es versteht sich von selbst, dass die Umfangsgeschwindigkeit der vorhergehenden Ofenrolle auch über andere Wege zur Verfügung gestellt werden kann. Datenleitungen, Schnittstellen von Steuerungen und Messeinrichtungen sind Beispiele solcher Möglichkeiten. The risk of belt damage can be further reduced and the stability of the continuous furnace can be further improved if the circumferential speed of the roller of the impactor corresponds to the belt speed of the belt. In addition, the risk of cracking can be reduced by this special rotation of the role in thin-walled bands. Namely, the rollers take the tape at its own belt speed, which can avoid additional tensile, stowage or other loads on the belt. In order to reduce the design effort for driving the roller of the impact device, it can be provided that the circumferential speed of the roller of the impact device corresponds to that of the peripheral speed of the previously arranged in the belt running direction furnace roller. In addition, an already existing and usually extremely complex speed control of furnace rollers can be used to equalize the speed control of the impact device. Thus, a cost-effective continuous furnace can be created. In addition, the impact device according to the invention offers a cost-effective alternative for retrofitting purposes of existing continuous furnaces, because only the speed of the respective furnace roller has to be tapped for control purposes. It goes without saying that the circumferential speed of the preceding furnace roll can also be provided by other means. Data lines, interfaces of controllers and measuring devices are examples of such possibilities.
Weist in Abhängigkeit eines Stillstands des Bands die Rolle der Anpralleinrichtung einen von den anderen Ofenrollen unabhängigen Antrieb auf, dann kann stets eine gleichmäßige Durcherwärmung der Rolle sichergestellt werden. Nachteilige Änderungen in den Abmessungen der Rolle, insbesondere eine Schüsselung dieser, können so auf einfache Weise ausgeschlossen werden, was einen vergleichsweise standfesten Durchlaufofen schaffen kann. If, depending on a stoppage of the belt, the roller of the impacting device has a drive independent of the other furnace rollers, then a uniform thorough heating of the roller can always be ensured. Adverse changes in the dimensions of the role, in particular a bowl of this, can be excluded in a simple manner, which can provide a comparatively stable continuous furnace.
Die Beständigkeit der Rollen und damit die Standfestigkeit des Durchlaufofens kann weiter verbessert werden, wenn eine Wasserkühlung zum Kühlen der Rolle der Anpralleinrichtung vorgesehen ist. Außerdem kann eine Wasserkühlung des Sensors für besonders reproduzierbare Messergebnisse - selbst bei verschiedensten Temperaturverhältnissen im Durchlaufofen - sorgen, was einen universell verwendbaren Durchlaufofen schaffen kann. The durability of the rollers and thus the stability of the continuous furnace can be further improved if water cooling is provided for cooling the roller of the impact device. In addition, a water cooling of the sensor for particularly reproducible measurement results - even at different temperature conditions in the continuous furnace - provide, which can provide a universally applicable continuous furnace.
Die Gefahr eine Sensorbeschädigung kann auch bei unterschiedlichen Bandbewegungen ausgeschlossen werden, wenn in Bandlaufrichtung vor und nach dem Sensor eine als angetriebene Rolle ausgeführte Anpralleinrichtung angeordnet ist. Eine Metallbeschichtung auf Kobaltbasis, insbesondere CoCrAIY, hat sich bei der Rolle der Anpralleinrichtung als vorteilhaft herausgestellt. Äußerst hohe Beständigkeit der Rolle gegenüber widrigen Umgebungseinflüssen im Ofen sowie geringe Kratzneigung am Band können diese Beschichtung auszeichnen. The risk of damage to the sensor can be ruled out even with different belt movements if an impact device designed as a driven roller is arranged in the direction of travel of the belt before and after the sensor. A cobalt-based metal coating, particularly CoCrAlY, has been found to be advantageous in the role of the impactor. Extremely high resistance of the roll to adverse environmental conditions in the oven and low tendency to scratch on the belt can characterize this coating.
Letztgenannte Vorteile können verbessert werden, wenn die Oberfläche der Rolle der Anpralleinrichtung poliert und gebürstet ist. The latter advantages can be improved if the surface of the roller of the impact device is polished and brushed.
Zur Verbesserung der Standfestigkeit eines Durchlaufofens, sowie zur Schaffung einer verminderten Beschädigungsgefahr solcher Öfen, kann sich die Verwendung einer als angetriebene Rolle ausgeführten Anpralleinrichtung in einem Durchlaufofen zum Schutz eines im Durchlaufofen angeordneten Sensors gegenüber einem Anprall eines durch den Durchlaufofen auf Ofenrollen geführten metallischen Bands, insbesondere eines Stahlbands, auszeichnen. To improve the stability of a continuous furnace, as well as to create a reduced risk of damage such ovens, the use of a designed as a driven roller impactor in a continuous furnace to protect a arranged in a continuous furnace sensor against an impact of a run through the continuous furnace furnace rolls metal belt, in particular a steel band, distinguished.
Kurze Beschreibung der Zeichnung Short description of the drawing
In den Figuren ist der Erfindungsgegenstand beispielsweise anhand eines Ausführungsbeispiels dargestellt. Es zeigen In the figures, the subject invention is illustrated for example with reference to an embodiment. Show it
Fig. 1 eine schematische und aufgerissene Seitenansicht auf einen Teil des Durchlaufofens und Fig. 1 is a schematic and torn side view of a portion of the continuous furnace and
Fig. 2 eine vergrößerte Schnittansicht auf die erfindungsgemäße Anpralleinrichtung. Weg zur Ausführung der Erfindung Fig. 2 is an enlarged sectional view of the impact device according to the invention. Way to carry out the invention
Gemäß Fig. 1 wird in schematischer Ansicht als Ausführungsbeispiel ein Durchlaufofen 1 gezeigt, der auf- und abgerissen dargestellt wird. Im Allgemeinen wird erwähnt, dass unter einem Durchlaufofen 1 jeder Ofen verstanden werden kann, durch den ein Band 2 bewegt wird, sei es gezogen, geschoben oder anders bewegt. Insbesondere kann ein Durchlaufofen 1 auch als Strahlrohrofen ausgeführt sein, was nicht näher dargestellt worden ist. Im Durchlaufofen 1 wird nun ein metallisches Band 2, insbesondere ein Stahlband, über ein mehrere Ofenrollen 3 und 4 aufweisendes Lenkrollengerüst 5 durchgeführt. Die Ofenrollen 3 und 4 werden entsprechend der Bandlaufgeschwindigkeit von je einem Antrieb 6 über eine Antriebsachse 6' rotierend in Bewegung gesetzt, wobei die Antriebe außerhalb des Durchlaufofens angeordnet sind. Im Durchlaufofen 1 ist weiters ein Sensor 7 angeordnet, der mit seiner nicht dargestellten Sende- und Empfangsspule eine induktive Erkennung der Lage des durchgeführten und gespannten Bands 2 im Durchlaufofen 1 vornimmt. Die Sende- und Empfangsspule können in einem Sensorgehäuse oder auch in verschiedenen Gehäusen angeordnet sein. Der Sensor 7 weist außerdem eine vergleichsweise spröde Keramikhülle 8 auf. Um nun den Sensor 7 gegenüber einer Beschädigung durch eine Berührung mit dem durchlaufenden Band 2 schützen zu können, ist in Bandlaufrichtung 9 vor und nach dem Sensor 7 je eine Anpralleinrichtung 10 vorgesehen. Wie in Fig. 1 dargestellt, trägt nun die Anpralleinrichtung 10 die kinematische Energie der Bandbewegung des Bands 2 auf, und verhindert so, dass sich das Band 2 in Richtung des Sensors 7 wölben kann. According to Fig. 1, a continuous furnace 1 is shown in a schematic view as an exemplary embodiment, which is shown up and torn off. In general, it is mentioned that a continuous furnace 1 can be understood to mean any furnace through which a belt 2 is moved, whether pulled, pushed or otherwise moved. In particular, a continuous furnace 1 can also be designed as a jet tube furnace, which has not been shown in detail. In the continuous furnace 1, a metallic strip 2, in particular a steel strip, is now carried out via a castor frame 5 having a plurality of furnace rolls 3 and 4. The furnace rollers 3 and 4 are set according to the tape speed of each drive 6 via a drive shaft 6 'rotating in motion, the drives are arranged outside of the continuous furnace. In the continuous furnace 1, a sensor 7 is further arranged, which makes an inductive detection of the position of the performed and tensioned tape 2 in the continuous furnace 1 with its not shown transmitting and receiving coil. The transmitting and receiving coil can be arranged in a sensor housing or in different housings. The sensor 7 also has a comparatively brittle ceramic shell 8. In order to be able to protect the sensor 7 against damage caused by contact with the continuous belt 2, an impact device 10 is provided in the belt running direction 9 before and after the sensor 7. As shown in Fig. 1, now the impactor 10 carries the kinematic energy of the belt movement of the belt 2, and thus prevents the belt 2 can bulge in the direction of the sensor 7.
Zu diesem Zweck ist der Sensor 7 gegenüber den Anpralleinrichtungen 10 weiter gegenüber dem Band beabstandet - in anderen Worten, die Anpralleinrichtung 10 ist in Relation zum Sensor 7 wenigstens teilweise näher zum Band 2 beabstandet angeordnet. For this purpose, the sensor 7 is further spaced from the belt with respect to the impact devices 10 - in other words, the impact device 10 is at least partially spaced closer to the belt 2 in relation to the sensor 7.
Zu diesem Zweck ist der Sensor 7 gegenüber den Anpralleinrichtungen 10 gegenüber dem Band 2 weiter entfernt beabstandet - in anderen Worten, die Anpralleinrichtung 10 ist im Vergleich zum Sensor 7 wenigstens teilweise näher in Richtung des durchgeführten Band 2 angeordnet. For this purpose, the sensor 7 is spaced further away from the belt 2 with respect to the impact devices 10 - in other words, the impact device 10 is arranged at least partially closer in the direction of the belt 2 being carried out in comparison to the sensor 7.
Die Anpralleinrichtung 10 ist im Normalfall gegenüber dem durchlaufenden Band 2 berührungsfrei. Um jedoch die Beschädigung des Bands 2 aufgrund eines eventuel- len Anpralls mit der Anpralleinrichtung 10 zu verringern, vorzugsweise solch eine Beschädigung auszuschließen, wird die Anpralleinrichtung 10 als eine in Rotation versetzte Rolle 1 1 ausgeführt. Zu diesem Zweck weist die Anpralleinrichtung 10 eine von einem Antrieb 12 entsprechend der Bandlaufrichtung 9 angetriebene Rolle 1 1 zur Bandberührung auf, welche die Rotationsrichtung 1 1 ' aufweist. Die Rolle 1 1 rotiert daher bereits vor einem eventuellen Anprall des Bands 2, so dass es bei einer Berührung von Band 2 mit Rolle 1 1 zu einer verkleinerten Relativgeschwindigkeit und damit zu reduzierten Reibungseinflüssen kommt. Eventuell entstehende Einkerbungen können so vermindert bzw. ausgeschlossen werden, wodurch Kratzer in der Bandoberfläche vermieden werden. Der erfindungsgemäße Durchlaufofen 1 kann daher Bandbeschädigungen im Wesentlichen ausschließen. Außerdem können die Kraftbelastungen auf die Rolle 1 1 vermindert werden, weil sich bereits beim Anprall diese Rolle 1 1 in Rotation befindet, so dass ein standfester Durchlaufofen 1 sichergestellt werden kann. Zu diesem Zweck ist der Antrieb 12 über eine Antriebswelle 12' mit der Rolle 1 1 verbunden. The impact device 10 is normally contactless with respect to the continuous belt 2. However, to avoid damaging the tape 2 due to eventual len impact with the impactor 10, preferably to exclude such damage, the impactor 10 is carried out as a set in rotation roller 1 1. For this purpose, the impactor 10 has a driven by a drive 12 corresponding to the tape running direction 9 roller 1 1 for tape contact, which has the direction of rotation 1 1 '. The roller 1 1 therefore already rotates before a possible impact of the belt 2, so that it comes with a touch of tape 2 with roller 1 1 to a reduced relative speed and thus reduced friction. Any resulting notches can thus be reduced or eliminated, thereby avoiding scratches in the strip surface. The continuous furnace 1 according to the invention can therefore essentially rule out band damage. In addition, the force loads on the roller 1 1 can be reduced because this roller 1 1 is already in the impact during the impact, so that a stable continuous furnace 1 can be ensured. For this purpose, the drive 12 is connected via a drive shaft 12 'to the roller 1 1.
Im Allgemeinen sei hier erwähnt, dass solch ein Antrieb 6 bzw. 12 beispielsweise als Motor, als Motor samt Getriebeeinheit oder als eine andere Einrichtung zum Drehen der Rollen 3, 4 oder 1 1 verstanden werden kann, was der Übersichtlichkeit halber nicht dargestellt worden ist. In general, it should be mentioned here that such a drive 6 or 12 can be understood, for example, as a motor, as a motor together with a gear unit or as another device for rotating the rollers 3, 4 or 11, which has not been shown for the sake of clarity.
Auf der dem Sensor 7 und den Anpralleinrichtungen 10 gegenüberliegenden Seite des Bands 2 sind ebenso ein Sensor 7 und Anpralleinrichtungen 10 vorgesehen, um auch hier Messdaten zu einer beliebigen Seite des Bands 2 erfassen zu können. Die Rollen 1 1 rotieren hier ebenso entsprechend der Bandlaufrichtung 9 und weisen eine dementsprechende Rotationsrichtung 1 1 " auf. Es ist aber auch vorstellbar, die Sende- und Empfangsspule auf gegenüberliegenden Bandseiten in je einem Gehäuse vorzusehen, so dass sich der Sensor 7 auf beiden Bandseiten befindet. On the side of the belt 2 opposite the sensor 7 and the impact devices 10, a sensor 7 and impact devices 10 are likewise provided in order to be able to detect measurement data for any side of the belt 2. The rollers 1 1 also rotate here in accordance with the direction of tape travel 9 and have a corresponding direction of rotation 1 1 ", but it is also conceivable to provide the transmitting and receiving coil on opposite sides of the band in each case, so that the sensor 7 is on both sides of the band located.
Die Rollen 1 1 können auch gemäß der in deren Bereich vorherrschenden Bandgeschwindigkeit des Bands 2 in Rotation gebracht werden. Zu diesem Zweck muss lediglich die Umfangsgeschwindigkeit der Rolle 1 1 der Anpralleinnchtung 10 der Bandgeschwindigkeit des Bands 2 entsprechen. Über nicht dargestellte Sensoren kann nun diese Bandgeschwindigkeit gemessen bzw. auf diese rückgeschlossen und dann zur Steuerung des Antriebs 12 der Rollen 1 1 herangezogen werden. The rollers 11 can also be rotated in accordance with the band speed of the belt 2 prevailing in their area. For this purpose must only the peripheral speed of the roller 1 1 of the Anpralleinnchtung 10 of the belt speed of the belt 2 correspond. By means of sensors, not shown, this belt speed can now be measured or deduced therefrom and then used to control the drive 12 of the rollers 11.
Konstruktiv einfach ist die Umfangsgeschwindigkeit der Rolle 1 1 der Anpralleinrichtung 10 der Umfangsgeschwindigkeit der in Bandlaufrichtung vorher angeordneten Ofenrolle 4 entsprechend eingestellt. Zu diesem Zweck kann der Antrieb 12 herangezogen werden. Auch ist vorstellbar, für den Antrieb 12 der Rollen 1 1 den Antrieb 6 der Ofenrolle 4 zu verwenden - lediglich ein Übersetzungsverhältnis im Falle von unterschiedlichen Durchmessern der Rollen 6 und 1 1 , was gemäß Fig. 1 der Fall ist, wäre für die Rollen 1 1 entsprechend vorzusehen, um die Umfangsgeschwindigkeiten der Rollen 4 und 1 1 anzugleichen, was nicht dargestellt ist. Structurally simple, the peripheral speed of the roller 1 1 of the impact device 10 of the peripheral speed of the previously arranged in the strip running direction furnace roller 4 is set accordingly. For this purpose, the drive 12 can be used. It is also conceivable for the drive 12 of the rollers 1 1 to use the drive 6 of the oven roller 4 - only a gear ratio in the case of different diameters of the rollers 6 and 1 1, which is the case of FIG. 1, would be for the rollers. 1 1 to provide corresponding to the peripheral speeds of the rollers 4 and 1 1, which is not shown.
Der von den anderen Ofenrollen 3 und 4 unabhängige Antrieb 12 kann jedoch auch dafür dienlich sein, dass im Falle eines Stillstands des Bands 2 die Rollen 1 1 trotzdem angetrieben werden. Durch diese Rollenrotation ist nämlich eine gleichmäßige Erwärmung der Rolle 1 1 sichergestellt, was eine unerwünschte u-förmige Verformung der Rollen 1 1 ausschließen kann. However, the independent of the other furnace rollers 3 and 4 drive 12 may also be useful that in the case of a stoppage of the belt 2, the rollers 1 1 are still driven. By this rotation of the roller namely a uniform heating of the roller 1 1 is ensured, which can preclude an undesirable U-shaped deformation of the rollers 1 1.
Gemäß der Fig. 2 ist eine Wasserkühlung 13 zu entnehmen, die zum Kühlen der Rollen 1 1 verwendet wird. Zu diesem Zweck weisen die Rollen 1 1 einen Hohlraum 14 auf, durch den Wasser 15 als Kühlmittel geleitet werden kann. Die Sensoren können ebenso mit der Wasserkühlung 13 gekühlt werden, indem durch deren Mantel ebenso Wasser als Kühlmittel geleitet wird, was nicht näher dargestellt worden ist. 2, a water cooling 13 can be seen, which is used for cooling the rollers 1 1. For this purpose, the rollers 1 1 on a cavity 14, can be passed through the water 15 as a coolant. The sensors can also be cooled with the water cooling system 13, as well as water is passed through the jacket as a coolant, which has not been shown in detail.
Ebenso ist der Fig. 2 zu entnehmen, dass die Rolle 1 1 der Anpralleinrichtung 10 mit einer Metallbeschichtung 16 auf Kobaltbasis, insbesondere CoCrAIY, versehen ist, wobei die Oberfläche der Rolle 1 1 poliert und gebürstet sein kann. 2, it can be seen that the roller 1 1 of the impact device 10 is provided with a metal coating 16 based on cobalt, in particular CoCrAIY, wherein the surface of the roller 1 1 can be polished and brushed.
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP11773212.3A EP2619338A1 (en) | 2010-09-21 | 2011-09-21 | Continuous furnace for an in particular metallic strip |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT15712010A AT510468B1 (en) | 2010-09-21 | 2010-09-21 | FLOW FOOT FOR AN ESPECIALLY METALLIC TAPE |
| ATA1571/2010 | 2010-09-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2012038479A1 true WO2012038479A1 (en) | 2012-03-29 |
Family
ID=44936233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2011/066451 Ceased WO2012038479A1 (en) | 2010-09-21 | 2011-09-21 | Continuous furnace for an in particular metallic strip |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2619338A1 (en) |
| AT (1) | AT510468B1 (en) |
| WO (1) | WO2012038479A1 (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3421925A (en) * | 1965-07-30 | 1969-01-14 | Westinghouse Electric Corp | Method for producing improved metallic strip material |
| US3622140A (en) * | 1970-01-30 | 1971-11-23 | Nat Steel Corp | Continuous heat treating line |
| EP0128734A2 (en) * | 1983-06-11 | 1984-12-19 | Nippon Steel Corporation | Method for cooling a steel strip in a continuous-annealing furnace |
| EP0265700A1 (en) * | 1986-09-30 | 1988-05-04 | Kawasaki Steel Corporation | Method and system for controlling tension to be exerted on metal strip in continuous annealing furnace |
| JPH0813043A (en) * | 1994-07-04 | 1996-01-16 | Nippon Steel Corp | Strip tension controller |
| DE19619049A1 (en) | 1996-05-02 | 1997-11-06 | Rolf Schwartz | Continuous heat treatment furnace for strip-like material |
| US6341955B1 (en) * | 1998-10-23 | 2002-01-29 | Kawasaki Steel Corporation | Sealing apparatus in continuous heat-treatment furnace and sealing method |
| KR20030054324A (en) * | 2001-12-24 | 2003-07-02 | 주식회사 포스코 | Apparatus for strip position adjustment in continuous annealing line |
| JP2004255412A (en) * | 2003-02-26 | 2004-09-16 | Jfe Steel Kk | Marking method of defect mark and metal strip marked with defect mark |
| KR20100007588A (en) * | 2008-07-14 | 2010-01-22 | 주식회사 포스코 | Strip transfer apparatus |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT396559B (en) * | 1990-12-20 | 1993-10-25 | Voest Alpine Ind Anlagen | SLAM CONTINUOUS CASTING MILL WITH SUBordinate ROLLING MILL |
| JPH06210225A (en) * | 1993-01-19 | 1994-08-02 | Matsushita Electric Ind Co Ltd | Viscous substance coating device |
| DE10303228B3 (en) * | 2003-01-28 | 2004-04-15 | Kramer, Carl, Prof. Dr.-Ing. | Device for heat treating metallic strips has a heat treatment section containing a heating region and a first cooling region, and nozzle fields for producing impact beams onto the strips |
-
2010
- 2010-09-21 AT AT15712010A patent/AT510468B1/en not_active IP Right Cessation
-
2011
- 2011-09-21 WO PCT/EP2011/066451 patent/WO2012038479A1/en not_active Ceased
- 2011-09-21 EP EP11773212.3A patent/EP2619338A1/en not_active Withdrawn
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3421925A (en) * | 1965-07-30 | 1969-01-14 | Westinghouse Electric Corp | Method for producing improved metallic strip material |
| US3622140A (en) * | 1970-01-30 | 1971-11-23 | Nat Steel Corp | Continuous heat treating line |
| EP0128734A2 (en) * | 1983-06-11 | 1984-12-19 | Nippon Steel Corporation | Method for cooling a steel strip in a continuous-annealing furnace |
| EP0265700A1 (en) * | 1986-09-30 | 1988-05-04 | Kawasaki Steel Corporation | Method and system for controlling tension to be exerted on metal strip in continuous annealing furnace |
| JPH0813043A (en) * | 1994-07-04 | 1996-01-16 | Nippon Steel Corp | Strip tension controller |
| DE19619049A1 (en) | 1996-05-02 | 1997-11-06 | Rolf Schwartz | Continuous heat treatment furnace for strip-like material |
| US6341955B1 (en) * | 1998-10-23 | 2002-01-29 | Kawasaki Steel Corporation | Sealing apparatus in continuous heat-treatment furnace and sealing method |
| KR20030054324A (en) * | 2001-12-24 | 2003-07-02 | 주식회사 포스코 | Apparatus for strip position adjustment in continuous annealing line |
| JP2004255412A (en) * | 2003-02-26 | 2004-09-16 | Jfe Steel Kk | Marking method of defect mark and metal strip marked with defect mark |
| KR20100007588A (en) * | 2008-07-14 | 2010-01-22 | 주식회사 포스코 | Strip transfer apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| AT510468B1 (en) | 2012-07-15 |
| AT510468A1 (en) | 2012-04-15 |
| EP2619338A1 (en) | 2013-07-31 |
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