EP0650534B2 - Beschichtungsvorrichtung - Google Patents
Beschichtungsvorrichtung Download PDFInfo
- Publication number
- EP0650534B2 EP0650534B2 EP93915935A EP93915935A EP0650534B2 EP 0650534 B2 EP0650534 B2 EP 0650534B2 EP 93915935 A EP93915935 A EP 93915935A EP 93915935 A EP93915935 A EP 93915935A EP 0650534 B2 EP0650534 B2 EP 0650534B2
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- metal strip
- nozzle body
- measuring
- strip
- 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.)
- Expired - Lifetime
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
- C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
- C23C2/18—Removing excess of molten coatings from elongated material
- C23C2/20—Strips; Plates
Definitions
- the invention relates to a device for continuous Coating metal strip, in particular for galvanizing steel strip, below the Melt level of a coating agent bath running through the belt at least one adjustable Guide role is provided with one of the at least a subordinate role, above the melt level arranged and with a blow-off medium, especially compressed air Blow-off nozzle pair, between the nozzle bodies the tape at a distance to the respective one across Belt run extending nozzle columns is, with at least one of the two relative to the metal strip adjustable nozzle body an optical Measuring device for detecting the distance between Nozzle gap and metal strip surface is assigned, whose measuring beam with its optical axis almost is directed perpendicular to the metal strip surface and the output signal of an adjusting device for the leadership role and / or an adjustment device for the nozzle body can be fed such that the distance can be specified between the nozzle gap and the metal strip surface is.
- a device for continuous coating von Stahlband is known from DE-A-30 14651.
- This known device is used for surface treatment one in the continuous hot-dip process on both sides coated with a metal, especially zinc Metal bands, especially steel bands.
- the metal strip is placed in a bath with the liquid coating agent led and over a below the Deflecting roller arranged vertically continued upwards.
- the one below the melt level arranged in the coating agent bath Guide rollers serve to stabilize the belt, by making sure that the coating agent coated tape is as flat as possible if it is vertically upwards from the coating agent bath emerges and reaches the area of the blow-off nozzle pair.
- the tape is guided so that it is as possible in the middle through the opposing nozzle bodies each of the blow-off nozzles arranged on a metal belt side runs. But it has been shown that it nevertheless to inhomogeneities of the layer thickness on the comes out of the band emerging from the nozzle body pair, which by adjusting the guide rollers alone cannot be compensated.
- EP-A-0 249 234 Another device for blowing galvanized Steel strip is known from EP-A-0 249 234.
- the nozzle gap is two mutually adjustable nozzle lips formed, so that the pressure acting on the metal strip surface the blow-off medium is adjustable.
- the metal band sensors provided with a Computers are connected, by means of whose output control valves can be controlled via the amount of Blow-off medium with which the nozzle gap acts is variable.
- the coating thickness can be reduced to one desired setpoint.
- Join this device deviations in the course of the band the central position, it comes because of the uneven Application along the belt surface the bandwidth with the blow-off medium to inhomogeneities in the coating.
- Another device is from WO-A-92/02656 known in which the nozzle body as a nozzle line is designed such that along the direction of Nozzle gaps several separate with the blow-off medium partial nozzles sealed against each other are provided. This can cause bumps of the tape to be coated, since the Printing conditions along the width of the nozzle gap are variable due to the division into the sub-nozzles.
- a device of the type mentioned is known from EP 0 188 813.
- Distance measuring devices arranged transversely to the tape running direction provided by means of which the flatness of the tape is determined. Such a device is only with great effort with changing width to convert the metal strip.
- the invention has for its object a device of the type mentioned at the outset to further develop that it gets more practicality.
- the combination of optical measuring device and the adjustment devices a control loop arrangement for the nozzle body or guide rollers formed, which enables an accurate spatial allocation between the nozzle columns on the one hand and the volume on the other.
- the current band course can be the distance between the metal strip surface and the die gaps are kept constant so that by the central belt run even with belt running errors, such as sloping or curved band, always a homogeneous Coating is achieved.
- the optical The measuring device continuously carries out a target-actual comparison through by the respective actual Distance between nozzle gap and strip surface determined. This creates a control loop which for constant blow-off conditions along the bandwidth ensures overall coating homogeneity is significantly improved.
- a structurally simple solution provides that the Measuring device is carried by the nozzle body.
- the structural unit can change the distance between the belt surface and the one with the position of the Nozzle gap related reference points the optical measuring device with high accuracy be settled.
- the nozzle body in the normal plane of the metal strip by means of the Adjustment drive can be moved transversely and / or rotatably is.
- the transverse adjustment of the nozzle body comes into play when the situation of the Metal strip parallel to the target position, i.e. plane-parallel changed to the nozzle gap so that by the lateral movement the nozzle body can be compensated.
- Such a lateral adjustment also comes into play Wear when the metal band has a certain curvature experiences. Then can be achieved through the lateral movement that the required minimum distance observed between the nozzle gap and the metal strip surface is so that there is no touch of either is coming.
- the rotary adjustment of the nozzle body comes into consideration if the tape is in one plane viewed at right angles to the direction of travel Angled angles so that it is on the belt edges would come into contact with the nozzle gap. By appropriate positioning of the nozzle body leaves compensate for this error as well.
- the nozzle body about an axis is pivotable parallel to the nozzle gap, with the Correction of the output signal of the at least one Measuring device detecting the swivel angle Angle correction device is provided.
- a such angular correction is required if dependent on the viscosity of the coating material the stripping conditions changed during the process Need to become. Because by pivoting the Nozzle body around a parallel to the nozzle gap Axis in the case of a fixed on the nozzle body arranged measuring sensor a falsification of the distance signal occurs, is an electronic angle detection device to correct the above-mentioned error required.
- a nozzle body on each side of the metal strip provided with at least one measuring device each is, with a common evaluation device for the measurement signals for coupled control of the respective Adjustment drives assigned to the two nozzle bodies is.
- This can, in particular, be the objective achieved, a homogeneous coating on both sides to reach the metal strip.
- optical sensors which the distance to Metal strip surface over the runtime measurement of your Detect light beam.
- an optical Measuring device carries parallel to the nozzle gap at least the area of an edge of the metal strip is movable overlapping and that the opposite Nozzle body has a reflector on the the optical axis of the measuring device in its position is directed outside the metal band edge and that an evaluation device is arranged downstream of the measuring device which is the measurement signal of the current position assigned to the traversing axis and to a control loop for an adjusting device of at least one nozzle body and / or for an adjustment device for the guide roller passes on, so that the distance between the nozzle gap and metal strip surface can be predetermined.
- This variant is characterized in that a exact distance measurement both in relation to the Distance between the nozzle body and the distance one nozzle body each from the one facing it Metal strip surface is made possible.
- the optical measuring device two Distance areas covered, namely those within the metal bandwidth and those outside, While in the area within the metal band edge the distance between nozzle and belt is determined in Area outside the edges of the nozzle-nozzle distance. The positioning can be based on these two measurement signals the nozzle body now take place so that both Nozzle body with respect to the metal strip to a defined Distance can be driven, in particular, that both nozzle bodies are symmetrical in relation are arranged on the tape.
- the measuring device is an evaluation device subordinate to the measurement signal of the current position assigned on the traversing axis and to a control loop for the adjustment device at least one Passes nozzle body. This creates an automation option by the nozzle body or bodies via one or more adjustment devices adjusted in accordance with the measurement signal obtained be that the course of the tape is as central as possible results.
- the evaluation device preferably has a Discriminator to distinguish between that of Metal strip and the measurement signal reflected by the reflector on. This makes it possible to find the exact position the band edge and thus also in this regard symmetrization, for example when using of special nozzles directed towards the edges ("Edge nozzles").
- Edge nozzles as described in EP-A-0 219 234, serve to grow zinc on the edges to reduce targeted blowing.
- the position of the edge nozzle can also be changed automatically be set in one of the measuring devices the respective position of the metal strip edge is detected.
- the edge nozzles can cover the area of the metal strip edge Measuring devices also for continuous Monitoring of the actual metal bandwidth used become.
- the simplest design of the second variant provides that the one nozzle body has two measuring devices are assigned, each of which does not overlap Areas of at least half the metal bandwidth are movable, each measuring device can be moved by a separate drive. At this Embodiment takes over each of the two measuring devices the function of distance measurement within the band edge as well as outside the band edge. During the coating process, each of the two Measuring devices from separate drives continuously Move parallel to the nozzle gap, constantly or measurement signals obtained in certain time periods become.
- Another embodiment provides instead of two individual measuring devices that the one nozzle body two pairs of measuring devices each has non-overlapping travel ranges, the measuring devices of the first pair over are movable less than half the metal bandwidth and the second pair measuring devices the area cover the respective metal band edge.
- the functions distance measurement nozzle-belt, Measurement of the metal bandwidth or distance measurement Nozzle-nozzle on separate measuring devices transferred, the first measuring devices for the Measurement nozzle band always in the area within the Band edge and the second pairs of measuring devices always oscillating around the band edge and be moved by separate drives.
- the reflector is preferably by a flat, that runs parallel to the metal strip, in particular reflective Band formed, the width chosen so is that at least the edge positions of the to be coated Band are covered. Now you want Coating tapes of different widths, so must the tape should have such a position that it is out of range the edge of the narrowest to over the edge of the widest band extends in the transverse direction of the band, thus even the widest to be coated Metal tape still the measuring device aimed at the edge receives a corresponding reflection signal.
- this is preferably so attached to the nozzle body carrying it that a Angular misalignment using a compensating screw provided for this purpose can be compensated.
- the angular position remains the measuring device relative to the belt when pivoting get the nozzle body, so that on a additional angle compensation can be dispensed with can.
- FIG. 1 shows a metal strip 1 which, coming from the top right, is obliquely immersed in a coating agent bath 15, of which only the melt level 14 is shown.
- the band 1 is deflected by means of a deflection roller 6 carried by a holder 13 in such a way that it then runs vertically upwards.
- two guide rollers 5 are provided, which are located on opposite sides of the metal strip 1.
- the guide rollers 5 are arranged offset in height from one another and each can be adjusted separately by adjusting drives 12 in the direction perpendicular to the running direction of the metal strip 1.
- the metal strip 1 coated with liquid zinc emerges from the coating agent bath 15 and strikes two nozzle bodies 2 arranged on one side of the metal strip 1, the nozzle gaps 3 of which have a certain distance X from the respective metal strip surface.
- One of the nozzle bodies 2 carries an attachment for a measuring device 4 on its upper side.
- the measuring device 4 is an optical sensor which emits a light beam along the optical axis denoted by a, which falls approximately perpendicularly onto the strip surface.
- the side of the measuring device 4 on which the light beam emerges is surrounded by a protective sleeve 7 which is pressurized with compressed air.
- FIG. 2 shows a plan view of the detail from FIG.
- two measuring devices 4a, 4b are provided along the width of the metal strip 1 and are arranged on a guide carriage 16 , wherein each of the measuring devices 4a, 4b can be moved separately in relation to the nozzle body 2 in a direction parallel to the width of the metal strip 1 or the nozzle gap 3 by means of an associated drive 17a, 17b.
- the two measuring devices 4a, 4b can by means of the drives 17a, 17b are moved so that the left Measuring device 4a to the left edge area of the Metal strip 1 and the right measuring device 4b to Move to the right edge of the metal strip can be.
- the entire attachment 8 on the nozzle body 2, which the measuring device 4 includes, is by means of a Fenders 8a, 8b (Fig. 3) encapsulated.
- the adjustment drive for the nozzle body 2 is made from two linear drives also shown in FIG. 2 11, wherein the nozzle body compared to the linear drives is gimbal mounted. In the same direction The movement of the drives is the nozzle body 2 in the Normal level of the metal band laterally adjustable, see above that the distance between the nozzle gap 3 and the surface the metal strip is changeable.
- each nozzle body 2 is about a pivot point 9 (see Fig.3) can be pivoted so that the nozzle gap 3 in the dashed position shown are brought can, which an angle change compared to the Corresponds to normal level.
- an angle detection device 10 is provided, which is the pivot angle around the pivot point 9 detects and a corresponding correction signal to compensate for the error of the measuring device 4 emits, which is due to the fact that the optical axis a no longer vertical in the event of a pivoting with respect to the tape running direction, i.e. no more corresponds to the shortest distance.
- the aim of the device according to the invention is the Distance between nozzle gap 3 and metal strip surface each of the two sides of the metal band on one to keep constant value x.
- To deviations from the flat central position of the metal strip, which in FIGS. 4a-4c is represented by the dashed line. is the actual location of the metal strip from the measuring devices 4a, 4b continuously recorded and the respective signal, which is known at fixed spatial allocation between measuring device and Nozzle gap to the respective distance of the point corresponds to the nozzle gap from the metal strip surface, to one on the adjustment drives for the nozzle body or for the guide roller 5 acting evaluation device given.
- the measuring devices 4a, 4b become the same Determine the reduction in distance, whereupon the upper Nozzle body 2 by means of the adjustment drive 11 in Fig. 4a is moved up to the setpoint x of the distance between the nozzle gap 3 and the metal strip surface 1 to be observed.
- the adjustment drive moves accordingly 11 of the lower nozzle body 2 also after above, so that as a result the desired distance again is achieved.
- the two Measuring devices along the metal bandwidth in each case show different distances, whereby in upper left area and lower right area from Fig. 4b the target value of the distance between the nozzle gap and below the metal strip surface.
- the correction is then made by rotating the respective one Nozzle body as indicated by the circular arrows in Fig. 4b is indicated. After the correction is over even with this tape running error over the entire Bandwidth again to maintain the desired distance value.
- Fig. 4c Another possible tape run error is in Fig. 4c indicated that the volume 1 bulges.
- the permissible distance is determined by the curvature in the upper area around the middle of the band and in the lower Area below the band edges, so that it this creates a risk of contact between the tape and nozzle comes.
- a correction is made this error such that the upper nozzle body 2 laterally adjusted up along the whole Bandwidth at least the setpoint for the distance between the belt and the nozzle gap. This means that this value reaches in the middle of the band will while necessarily at the band edges a larger distance is required.
- the device according to the invention looks over the previously described compensation of tape running errors furthermore the possibility of relating the nozzle body 2 to pivot to the pivot point 9. For example may be necessary if the viscosity the coating agent changes during the process, so that the stripping conditions are changed accordingly Need to become. Then the respective move Nozzle column 3 in the dashed line shown in Fig. 1 Position. To occur due to the angle change is the angle correction device 10 provided. However, this is not necessary if the measuring devices 4a, 4b not, as in the embodiments shown in the drawings on the nozzle body 2 arranged stationary, but in a separate structural Unit are housed.
- the measuring devices 4a, 4b shown in Fig. 2 can easily adapt to a changing width the metal strip 1 can be adjusted because they are independent can be moved in front of one another by means of the drives 17a, 17b are.
- the first embodiment shown in FIG. 5 the second variant shows two on each side of the metal strip 1 to be coated Nozzle body 2, the nozzle column each a certain Distance x to the surface of the metal strip 1 to have.
- the lower nozzle body shown on the right in FIG. 9 2 carries an attachment for the on its top Measuring device 4.
- the housing of the measuring device 4 consists of a Housing cover 8b and a rear housing part 8a, which can be opened.
- the optical measuring device 4 rests on a Carriage 16, on which they run along the width of the metal belt 1 is movable.
- the entire unit consisting of sled 16, Measuring device 4 and housing 8a, 8b can be opposite the nozzle body 2 carrying it by means of an angle compensation screw 20 by a certain angle of rotation be adjusted. This is important if the nozzle body 2 rotatable about the pivot point 9 is adjusted will and this angle from the electronic Angle detection 10 is determined.
- Each of the two nozzle bodies 2 is by means of a Drive 11 in the direction perpendicular to the transport direction of the metal strip 1 in that shown in Fig. 5 Movable normal plane.
- Nozzle body 11 of the adjustment drive from two linear drives 11, against which the nozzle body 2 gimbal is stored. With the same movement of his The nozzle body 2 is drives laterally to the metal strip 1 adjustable or away from it, so that the distance between the nozzle gap 3 and the metal strip surface is changeable.
- Reflectors 18 are provided, each designated K Cover band edges.
- Each of the two measuring devices 4 is along of the carriage 16 move continuously so that the measuring beam denoted by a of the respective measuring device 4 in the area within the metal band edge K from Metal strip 1 is reflected.
- the measuring device arrives 4 takes place in the area of the metal strip edge K. abrupt transition of the reflection from the metal band on the reflector 18. This abrupt transition enables precise position detection of the belt edge.
- the optical measures Measuring device 4 each the distance between the defined point on the nozzle body 2 and the metal strip surface. Shows up in the course of the measurement the travel path within the metal strip edges, that the distance changes means one Inclination of the metal band in relation to the nozzle gap. This can be done by appropriate control the adjusting devices 11 or the guide rollers 5 in the "two or three roller system" (Fig. 1) compensated become.
- the second variant of the invention differs of the described in that instead of two Measuring devices, each more than the band half cover, four measuring devices are provided, of which the two inner ones constantly in the one with ⁇ a designated travel range, always within the band edge K lies.
- the two outer ones Measuring devices 4b oscillate within of the area labeled ⁇ b around the band edges K, the measuring beam of the measuring devices 4b partly reflected by the metal strip and partly by the reflectors 18 becomes. This allows the measurement signals for the Distance between nozzle body band and nozzle body-nozzle body as well as for the bandwidth at the same time, which enables a faster evaluation.
- FIGS. 8 and 9 differs from that of FIG. 2 only in that the oscillating in the edge area optical measuring devices 4b not on the common Guide carriage of the nozzle body 2 arranged which is also the one directed at the metal strip optical measuring devices 4a carries. Much more is for those aimed at the edge areas K. optical measuring devices 4b another guide carriage 16 on the opposite nozzle body 2 provided. The reflector is then open accordingly provided the nozzle body 2, which also the optical measuring devices 4a carries. That of the respective Measuring devices covered travel ranges ⁇ a and ⁇ b are compared to that shown in Fig. 6 Embodiment unchanged.
- the exemplary embodiments shown offer advantages during adjustment. Namely from technological Found the volume 1 not in the solid Lines shown position are blown off but in the dashed position, so everyone is the Nozzle body 2 to rotate the pivot point 9.
- the rotation of the nozzle body 2 is from an electronic Angle detection 10 found. So that the optical Axis of each measuring device 4a, 4b as before is perpendicular to the metal strip 1, the angular offset must be compensated for by a Angle compensation screw 20. Such an angle correction can also be done electronically by the Measuring signal of the angle detection 10 for the position of the Compensating screw 20 is used.
- Fig.10 shows an alternative to the arrangement in the right Half of the figure of Figures 7 and 9.
- the measuring device 4 does not rest directly on the nozzle body 2 but is on a traverse 22 attached, along which the measuring device 4 transverse to Belt running direction is movable.
- the traverse 22 is by means of a truss drive 23 with respect to the metal strip 1 adjustable.
- the traverse 22 is in the range of Pivot 9 is supported for the nozzle body 2. Indeed the nozzle body 2 is rotatable relative to one another at the pivot point 9 the traverse 22, so that when the Nozzle body 2 shown in dashed lines in Figure 12 Position the traverse 23 and thus the measuring device 4 stay stationary.
- one above the nozzle gap 3 arranged shield plate 24 is provided, which carried by the nozzle body 2 essentially runs flat and only on its assigned to the metal band Edge slightly inclined towards the nozzle gap 3 to prevent contact with the tape. In this way, blow-off medium loaded with zinc is in held the space below the screen so that the optical sensitive to pollution Measuring device is protected.
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- Organic Chemistry (AREA)
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- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Coating Apparatus (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Coating With Molten Metal (AREA)
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- Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
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Description
- Fig. 1 - Fig. 4
- Ausführungsbeispiele zu der ersten Variante der Erfindung.
- Fig. 5 - Fig. 10
- Ausführungsbeispiele zu der zweiten Variante der Erfindung
- Fig. 1
- ein erstes Ausführungsbeispiel im Schnitt der Gesamtbeschichtungsvorrichtung,
- Fig. 2
- das erste Ausführungsbeispiel als Draufsicht in der Normalebene des Metallbandes, in dem die Abblaseinheit darstellenden Detail,
- Fig. 3
- ein Schnitt entlang der Linie AA in Fig. 1,
- Fig. 4
- eine Skizze zur Erläuterung der Funktion der Vorrichtung nach der ersten Variante der Erfindung bei
- Fig. 4a
- einer Lateralverschiebung des Metallbandes,
- Fig. 4b
- einer Schrägstellung des Metallbandes und
- Fig. 4c
- einer Wölbung des Metallbandes:
- Fig. 5
- ein erstes Ausführungsbeispiel als Draufsicht in der Normalebene des Metallbandes.
- Fig. 6
- ein zweites Ausführungsbeispiel.
- Fig. 7
- einen Schnitt entlang der Linie A-A in den Figuren 5 oder 6,
- Fig.8
- ein drittes Ausführungsbeispiel, ebenfalls als Draufsicht in der Normalebene des Metallbandes,
- Fig. 9
- einen Schnitt entlang der Linie B-B in Fig. 8 und
- Fig. 10
- ein viertes Ausführungsbeispiel im Schnitt.
Wie im Detail insbesondere aus Fig. 2 hervorgeht, die eine Draufsicht desjenigen Ausschnittes von Fig. 1 zeigt, der den Bereich der Düsenkörper 2 bildet, sind entlang der Breite des Metallbandes 1 zwei Meßeinrichtungen 4a,4b vorgesehen, die auf einem Führungsschlitten 16 angeordnet sind, wobei jede der Meßeinrichtungen 4a,4b mittels eines zugehörigen Antriebs 17a, 17b in einer Richtung parallel zur Breite des Metallbandes 1 bzw. des Düsenspalts 3 in Bezug auf den Düsenkörper 2 separat verfahrbar ist.
- 1
- Metallband
- 2
- Düsenkörper
- 3
- Düsenspalt
- 4,4a,4b
- optische Meßeinrichtung
- 5
- Führungsrolle
- 6
- Umlenkrolle
- 7
- Schutzhülse
- 8,8a,8b
- Schutzblech
- 9
- Drehpunkt
- 10
- Winkelerfassung
- 11
- Verstellantrieb für Düsenkörper
- 12
- Verstellantrieb für Führungsrolle
- 13
- Halterung für Umlenkrolle
- 14
- Schmelzespiegel
- 15
- Beschichtungsmittelbad
- 16
- Führungsschlitten
- 17a,b
- Antrieb für Führungsschlitten
- 18
- Reflektor
- 19
- Drehpunkt Reflektor
- 20
- Winkelausgleichsschraube
- 21
- Drehpunkt Meßeinrichtung
- 22
- Traverse
- 23
- Antrieb für Traverse
- 24
- Leitblech
- x
- Abstand Düsenspalt zur Metallbandoberfläche
- a
- optische Achse der Meßeinrichtung
- b
- Metallbandbreite
- K
- Metallbandkante
- Δ
- Verfahrbereich
- Δa
- Verfahrbereich der Abstandsmeßeinrichtung
- ▵b
- Verfahrbereich der Kantenmeßeinrichtung
Claims (26)
- Vorrichtung zum kontinuierlichen Beschichten von Metallband, insbesondere zum Verzinken von Stahlband, wobei unterhalb des Schmelzespiegels (14) eines vom Band (1) durchlaufenden Beschichtungsmittelbades (15) mindestens eine verstellbare Führungsrolle (5) vorgesehen ist, mit einem der mindestens einen Führungsrolle (5) nachgeordneten, oberhalb des Schmelzespiegels (14) angeordneten und mit einem Abblasmedium, insbesondere Druckluft, beaufschlagbaren Abblasdüsenpaar, zwischen dessen Düsenkörpern (2) das Band (1) mit Abstand zu den jeweiligen sich quer zur Bandlaufrichtung erstreckenden Düsenspalten geführt ist, wobei mindestens einem der beiden relativ zum Metallband (1) verstellbaren Düsenkörper (2) eine optische Meßeinrichtung (4) zur Erfassung des Abstandes zwischen Düsenspalt (3) und Metallbandoberfläche zugeordnet ist, deren Meßstrahl mit seiner optischen Achse nahezu senkrecht in Bezug zur Metallbandfläche gerichtet ist und deren Ausgangssignal einer Verstelleinrichtung für die Führungsrolle (5) und/oder einer Verstelleinrichtung für den Düsenkörper (2) derart zuführbar ist, daß der Abstand zwischen Düsenspalt (3) und Metallbandoberfläche vorgebbar ist,
dadurch gekennzeichnet, daß während des Betriebs der Vorrichtung entlang des Düsenspaltes mehrere, von jeweils einem separatem Antrieb (17a,17b) parallel zum Düsenspalt (3) kontinuierlich verfahrbare Meßeinrichtungen (4a,4b) vorgesehen sind, deren jeweilige Ausgangssignale von einem Verstellantrieb (11) für den Düsenkörper (2) bzw. von einem Verstellantrieb (12) für die Führungsrolle (5) gemeinsam ausgewertet werden. - Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß die optische Meßeinrichtung (4) vom Düsenkörper (2) getragen ist. - Vorrichtung nach einem der vorhergehenden Ansprüche
dadurch gekennzeichnet, daß der Düsenkörper (2) in der Normalebene des Metallbandes (1) mittels des Verstellantriebs (11) rotatorisch bewegbar ist. - Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß der Düsenkörper (2) in der Normalebene des Metallbandes (1) mittels des Verstellantriebs (11) transversal bewegbar ist. - Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß der Düsenkörper (2) um eine Achse parallel zum Düsenspalt (3) verschwenkbar ist. - Vorrichtung nach Anspruch 5,
dadurch gekennzeichnet, daß zur Korrektur des Ausgangssignals der Meßeinrichtung (4) eine den Verschwenkwinkel erfassende Winkelkorrektureinrichtung (10) vorgesehen ist. - Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß auf beiden Metallbandseiten jeweils ein Düsenkörper (2) mit jeweils mindestens einer Meßvorrichtung (4) vorgesehen ist. - Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß eine gemeinsame Auswerteeinrichtung für die Meßsignale zur gekoppelten Ansteuerung der jeweiligen Verstellantriebe (11) der beiden Düsenkörper (2) zugeordnet ist. - Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß die Meßeinrichtung (4) ein optischer Sensor ist, der den Abstand zur Metallbandoberfläche über die Laufzeit seines Lichtstrahls erfaßt. - Vorrichtung zum kontinuierlichen Beschichten von Metallband, insbesondere zum Verzinken von Stahlband, wobei unterhalb des Schmelzespiegels (14) eines vom Band (1) durchlaufenden Beschichtungsmittelbades (15) mindestens eine verstellbare Führungsrolle (5) vorgesehen ist, mit einem der mindestens einen Führungsrolle (5) nachgeordneten, oberhalb des Schmelzespiegels (14) angeordneten und mit einem Abblasmedium, insbesondere Druckluft, beaufschlagbaren Abblasdüsenpaar, zwischen dessen Düsenkörpern (2) das Band (1) mit Abstand zu den jeweiligen sich quer zur Bandlaufrichtung erstreckenden Düsenspalten geführt ist,
dadurch gekennzeichnet, daß mindestens einer der beiden relativ zum Metallband (1) verstellbaren Düsenkörper (2) eine optische Meßeinrichtung (4,4a,4b) trägt, die parallel zum Düsenspalt mindestens den Bereich einer Kante (K) des Metallbandes überdeckend verfahrbar ist und daß der gegenüberliegende Düsenkörper (2) einen Reflektor (18) aufweist, auf den die optische Achse (a) der Meßeinrichtung (4b,4) in deren Position außerhalb der Metallbandkante (K) gerichtet ist und daß der Meßeinrichtung (4,4a,4b) eine Auswerteeinrichtung nachgeordnet ist, die das Meßsignal der aktuellen Position auf der Verfahrachse zuordnet und an einen Regelkreis für eine Verstelleinrichtung (11) mindestens eines Düsenkörpers (2) und/oder für eine Verstelleinrichtung (12) für die Führungsrolle (5) weitergibt, so daß der Abstand zwischen Düsenspalt (3) und Metallbandoberfläche vorgebbar ist. - Vorrichtung nach Anspruch 10.
dadurch gekennzeichnet, daß die Auswerteeinrichtung einen Diskriminator zur Unterscheidung zwischen dem vom Metallband und dem vom Reflektor reflektierten Meßsignal enthält. - Vorrichtung nach einem der Ansprüche 10 oder 11,
dadurch gekennzeichnet, daß dem einen Düsenkörper (2) zwei Meßeinrichtungen (4) zugeordnet sind, die jeweils über sich nicht überlappende Bereiche (▵) von mindestens der halben Metallbandbreite verfahrbar sind. - Vorrichtung nach einem der Ansprüche 10 oder 11,
dadurch gekennzeichnet, daß der eine Düsenkörper (2) zwei Paare von Meßeinrichtungen (4a,4b) mit sich jeweils nicht überlappenden Verfahrbereichen aufweist, wobei die Meßeinrichtungen des ersten Paares (4a) über weniger als der halben Metallbandbreite (b) verfahrbar sind und die Meßeinrichtungen des zweiten Paares (4b) den Bereich der jeweiligen Metallbandkante (K) überdecken (Fig. 8). - Vorrichtung nach einem der Ansprüche 10 bis 13,
dadurch gekennzeichnet, daß alle Meßeinrichtungen (4,4a,4b) auf einem gemeinsamen oder auf separatem Führungsschlitten (12) angeordnet und jeweils von separaten Antrieben (17a,17b) antreibbar sind. - Vorrichtung nach Anspruch 13,
dadurch gekennzeichnet, daß die Meßeinrichtungen des ersten bzw. zweiten Paares (4a,4b) auf unterschiedlichen Düsenkörpern (2) angeordnet sind, wobei die um den Bereich der Metallbandkante (K) verfahrbaren Meßeinrichtungen (4b) auf dem dem Reflektor (18) gegenüberliegenden Düsenkörper (2) angeordnet sind. - Vorrichtung nach einem der Ansprüche 10 bis 15,
dadurch gekennzeichnet, daß jede Meßeinrichtung (4,4a,4b) von einem separaten Antrieb (17a, b) verfahrbar ist. - Vorrichtung nach einem der Ansprüche 10 bis 16,
dadurch gekennzeichnet, daß der Reflektor durch ein ebenes, parallel zum Metallband (1) verlaufendes insbesondere reflektierendes Band gebildet ist, dessen Breite so gewählt ist, daß mindestens die Kantenpositionen des zu beschichtenden Bandes überdeckt werden. - Vorrichtung nach Anspruch 17,
dadurch gekennzeichnet, daß das Reflektorband von einem auf den Düsenkörper (2) befestigten Träger gehalten wird. - Vorrichtung nach Anspruch 18,
dadurch gekennzeichnet, daß der Reflektorträger um einen Drehpunkt (19) drehbar ist. - Vorrichtung nach Anspruch 19,
dadurch gekennzeichnet, daß die Reflektorebene durch den Drehpunkt (9) des diesen tragenden Düsenkörpers (2) verläuft. - Vorrichtung nach Anspruch 15,
dadurch gekennzeichnet, daß der Reflektor (18) von einem die eine Gruppe von Meßeinrichtungen (4a) tragenden Gehäuse (8a,8b) gehalten ist. - Vorrichtung nach einem der Ansprüche 10 bis 21,
dadurch gekennzeichnet, daß der Düsenkörper (2) um eine Achse parallel zum Düsenspalt (3) verschwenkbar ist, wobei zur Korrektur des Ausgangssignals der Meßeinrichtung (4) eine den Verschwenkwinkel erfassende Winkelkorrektureinrichtung (10) vorgesehen ist. - Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß die vom Düsenkörper (2) getragene optische Meßeinrichtung mittels einer Winkelausgleichsschraube (20) verstellbar ist. - Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß die optische Meßeinrichtung (4,4a,4b) auf einer Traverse (22) angeordnet ist, die insbesondere mittels eines Traversenantriebs (23) in Richtung zum Metallband verstellbar ist. - Vorrichtung nach Anspruch 24,
dadurch gekennzeichnet, daß der Düsenkörper (2) gegenüber der Traverse (22) verschwenkbar ist. - Vorrichtung nach Anspruch 1 oder 10,
dadurch gekennzeichnet, daß in Bandlaufrichtung oberhalb des Düsenspaltes (3) ein den Bereich des Lichtstrahlaustritts der optischen Meßeinrichtung (4) abschirmendes, vom Düsenkörper (2) getragenes insbesondere ebenenes Abschirmblech (24) vorgesehen ist, welches an seiner dem Band (1) zugewandten Kante zum Düsenspalt (3) hin abgeschrägt ist.
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4223343 | 1992-07-16 | ||
DE19924223343 DE4223343C1 (de) | 1992-07-16 | 1992-07-16 | Abblasvorrichtung |
DE19934300868 DE4300868C1 (de) | 1993-01-15 | 1993-01-15 | Beschichtungsvorrichtung |
DE4300868 | 1993-01-15 | ||
DE19934306394 DE4306394C1 (de) | 1993-03-02 | 1993-03-02 | Abblasvorrichtung und Verfahren zum Abblasen von überflüssigem Beschichtungsmaterial |
DE4306394 | 1993-03-02 | ||
PCT/EP1993/001879 WO1994002658A1 (de) | 1992-07-16 | 1993-07-16 | Beschichtungsvorrichtung |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0650534A1 EP0650534A1 (de) | 1995-05-03 |
EP0650534B1 EP0650534B1 (de) | 1996-10-09 |
EP0650534B2 true EP0650534B2 (de) | 2001-05-02 |
Family
ID=27203976
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93915935A Expired - Lifetime EP0650534B2 (de) | 1992-07-16 | 1993-07-16 | Beschichtungsvorrichtung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0650534B2 (de) |
AT (1) | ATE144003T1 (de) |
DE (1) | DE59304141D1 (de) |
WO (1) | WO1994002658A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE1014355A3 (fr) * | 2001-08-30 | 2003-09-02 | Ct Rech Metallurgiques Asbl | Procede et dispositif pour la mesure de distances sur des bandes de metal brillant. |
DE102006052000A1 (de) | 2006-11-03 | 2008-05-08 | Emg Automation Gmbh | Vorrichtung zum Stabilisieren des Laufs eines Metallbandes |
CN101650160B (zh) * | 2009-03-27 | 2013-04-03 | 嘉兴市清河高力绝缘有限公司 | 四辊涂漆机辊隙测调方法 |
CN102780338B (zh) * | 2012-07-12 | 2016-11-09 | 上海紫邦科技有限公司 | 四辊式定子扇形片涂漆机 |
DE102013101131A1 (de) | 2013-02-05 | 2014-08-07 | Thyssenkrupp Steel Europe Ag | Vorrichtung zum Schmelztauchbeschichten von Metallband |
DE102014225516B3 (de) * | 2014-11-21 | 2016-03-31 | Fontaine Engineering Und Maschinen Gmbh | Verfahren und Vorrichtung zum Beschichten eines Metallbandes |
EP3382054A1 (de) * | 2017-03-30 | 2018-10-03 | Tata Steel IJmuiden B.V. | Beschichtetes metallblech, verfahren zur bereitstellung solch eines beschichtetes metallblechs und feuerverzinkungsvorrichtung zur herstellung solch eines beschichtetes metallblechs |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55141556A (en) † | 1979-04-18 | 1980-11-05 | Nisshin Steel Co Ltd | Nozzle-steel strip interval measuring instrument in molten metal plating equipment |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5698466A (en) * | 1980-01-10 | 1981-08-07 | Nippon Steel Corp | Measuring method for distance between plated steel plate and gas wiper nozzle |
DE3500878C1 (de) * | 1985-01-12 | 1986-01-09 | Thyssen Stahl AG, 4000 Düsseldorf | Verfahren und Vorrichtung zum Beschichten von Baendern mit schmelzfluessigem Metall,insbesondere zum Feuerverzinken von Stahlband |
JPS6230865A (ja) * | 1985-07-31 | 1987-02-09 | Sumitomo Metal Ind Ltd | 溶融金属めつきストリツプの製造方法と装置 |
JP3015086B2 (ja) * | 1990-09-25 | 2000-02-28 | 川崎製鉄株式会社 | 走行帯の位置・形状の測定方法及び装置 |
-
1993
- 1993-07-16 AT AT93915935T patent/ATE144003T1/de active
- 1993-07-16 EP EP93915935A patent/EP0650534B2/de not_active Expired - Lifetime
- 1993-07-16 WO PCT/EP1993/001879 patent/WO1994002658A1/de active IP Right Grant
- 1993-07-16 DE DE59304141T patent/DE59304141D1/de not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55141556A (en) † | 1979-04-18 | 1980-11-05 | Nisshin Steel Co Ltd | Nozzle-steel strip interval measuring instrument in molten metal plating equipment |
Non-Patent Citations (2)
Title |
---|
"Steel Technology International", 1988, Sterling Publications Ltd., Seiten 325-327 † |
EMG-Servotechnick, AEG, "Bandlaufregelungen für die Metallindustrie", aus 7/1991 † |
Also Published As
Publication number | Publication date |
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DE59304141D1 (de) | 1996-11-14 |
EP0650534A1 (de) | 1995-05-03 |
EP0650534B1 (de) | 1996-10-09 |
WO1994002658A1 (de) | 1994-02-03 |
ATE144003T1 (de) | 1996-10-15 |
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