EP3429770B1 - Vorrichtung und verfahren zum entzundern eines bewegten werkstücks - Google Patents

Vorrichtung und verfahren zum entzundern eines bewegten werkstücks Download PDF

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Publication number
EP3429770B1
EP3429770B1 EP17710888.3A EP17710888A EP3429770B1 EP 3429770 B1 EP3429770 B1 EP 3429770B1 EP 17710888 A EP17710888 A EP 17710888A EP 3429770 B1 EP3429770 B1 EP 3429770B1
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EP
European Patent Office
Prior art keywords
workpiece
rotor head
jet nozzles
liquid
rotation
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.)
Active
Application number
EP17710888.3A
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German (de)
English (en)
French (fr)
Other versions
EP3429770A1 (de
Inventor
Angela ANTE
Jan Schröder
Jens MARBURGER
Wolfgang Fuchs
Michael Jarchau
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SMS Group GmbH
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SMS Group GmbH
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Filing date
Publication date
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Publication of EP3429770A1 publication Critical patent/EP3429770A1/de
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Publication of EP3429770B1 publication Critical patent/EP3429770B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0421—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with rotating spray heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0463—Installation or apparatus for applying liquid or other fluent material to moving work of indefinite length
    • B05B13/0484—Installation or apparatus for applying liquid or other fluent material to moving work of indefinite length with spray heads having a circular motion, e.g. being attached to a rotating supporting element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
    • B05B14/30—Arrangements for collecting, re-using or eliminating excess spraying material comprising enclosures close to, or in contact with, the object to be sprayed and surrounding or confining the discharged spray or jet but not the object to be sprayed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/022—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements the rotating deflecting element being a ventilator or a fan
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/022—Cleaning travelling work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
    • B21B45/08—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing hydraulically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
    • B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
    • B08B2203/0264—Splash guards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B2038/004—Measuring scale thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2275/00—Mill drive parameters
    • B21B2275/02—Speed
    • B21B2275/06—Product speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product

Definitions

  • the invention relates to a device and a method for descaling a workpiece which is moved relative to the device in one direction of movement.
  • the workpiece is in particular a hot rolled product.
  • a scale washer in a hot rolling mill is an assembly that is used to remove scale, i.e. H. of impurities from iron oxide, is provided from the surface of the rolling stock.
  • a scale washer is known with which a rolling stock which is moved relative to the scale washer is descaled by irradiation with high-pressure spray water.
  • This scale washer comprises at least one row of nozzle heads with a plurality of nozzle heads that cross the width of the rolling stock, each nozzle head being driven in rotation by a motor about an axis of rotation perpendicular to the surface of the rolling stock. Furthermore, at least two nozzles which are arranged eccentrically with respect to the axis of rotation and which are arranged as close as possible in terms of construction to the circumference of the nozzle head are provided for each nozzle head.
  • Such a scale washer is subject to the disadvantage that an energy input across the width of the rolling stock can have inhomogeneities, so that there are permanent temperature streaks on the rolling stock in the overlapping area of adjacent nozzle heads.
  • the nozzles on the respective nozzle heads are arranged inclined outwards by an angle of attack, which in the Fig. 13 is illustrated. This means that the direction of spray of these nozzles at a Rotation of the nozzle heads about their axis of rotation is also aligned in the direction of the feed of the rolling stock.
  • Such an alignment of the high-pressure spray water discharged from the nozzles is disadvantageous in that the jet of the spray water is ineffective and therefore makes no contribution to descaling the surface of the rolling stock.
  • a method for descaling rolling stock in which a rotor descaling device is provided, by means of which a liquid jet is sprayed onto a surface of the rolling stock to be descaled.
  • the liquid jet is formed intermittently, that is to say temporarily. Due to the interruption of the liquid jet one or more times, pressure peaks occur which have an effect on increasing the jet pressure, as a result of which an improvement in the descaling effect for the rolling stock is achieved.
  • a control disk provided for this purpose which is provided in fluid connection with a pressure medium supply line, disadvantageously increases the design effort for this descaling technique. Furthermore, there is a risk of increased material stress, particularly due to cavitation, when the pressure peaks are formed.
  • a generic device and a generic method for descaling a workpiece are known, which is moved relative to the device in one direction of movement.
  • a plurality of blasting nozzles are provided on a rotating rotor head in the form of a nozzle holder, liquid being applied or sprayed under high pressure from the blasting nozzles onto a surface of the rolling stock in such a way that the direction of radiation with which the liquid is sprayed out of the blasting nozzles always runs at an angle to the direction of movement of the rolling stock.
  • This oblique alignment of the direction of radiation ensures that removed scale from the surface of the rolling stock to the side is transported away from the rolling stock.
  • this is accompanied by a disadvantageous heavy contamination of the system or its surrounding area.
  • the invention has for its object to optimize the descaling of a workpiece with simple means and to reduce the required energy and amount of water.
  • a device is used for descaling a workpiece, preferably a hot rolling stock, which is moved in a direction of movement relative to the device, and comprises at least one rotor head which can be rotated about an axis of rotation and to which a plurality of blasting nozzles are attached, a liquid, in particular water, from the blasting nozzles. can be applied to the workpiece at an angle of attack at an angle to the surface of the workpiece.
  • the jet nozzles are attached to the rotor head in such a way that when the rotor head rotates about its axis of rotation, the spray direction of the liquid discharged from the jet nozzles, based on a projection into a plane parallel to the surface of the workpiece, is permanently opposite, ie at an angle of spray between 170 ° and 190 °, preferably at a spray angle of 180 °, to the direction of movement of the workpiece and the angle of attack remains constant for all jet nozzles.
  • the device comprises a collecting device which is arranged upstream of the rotor head with respect to the direction of movement of the rolling stock, in such a way that both the liquid discharged from the jet nozzles after bouncing off the surface of the workpiece and the scale removed by means of the liquid from the surface of the workpiece can be specifically introduced into this collecting device.
  • the invention also provides a method for descaling a workpiece, preferably a hot rolled product.
  • the workpiece is moved relative to a device in one direction of movement, this device having at least one rotor head which can be rotated about an axis of rotation and to which a plurality of jet nozzles are attached. While the rotor head is rotated about its axis of rotation, a liquid, in particular water, is applied or sprayed from the jet nozzles onto the workpiece at an angle of incidence at an angle to the surface of the workpiece.
  • the spray direction of the liquid discharged from the jet nozzles is permanently opposite in relation to a projection into a plane parallel to the surface of the workpiece, i. H. aligned at an angle of spray between 170 ° and 190 °, in particular at an angle of 180 °, to the direction of movement of the workpiece, the angle of attack remaining constant for all jet nozzles.
  • both the liquid discharged from the jet nozzles after bouncing off the surface of the workpiece and the scale removed by means of the liquid from the surface of the workpiece are introduced into a collecting device in a targeted manner.
  • the invention is based on the essential finding that by means of the arrangement of the rotor head relative to the direction of movement of the workpiece and the attachment of the jet nozzles to the rotor head, it is possible to align the liquid dispensed from the jet nozzles permanently and preferably exactly in the opposite direction to the direction of movement of the workpiece, namely related on or in a projection of the spray direction of this liquid in a plane parallel to the surface of the workpiece.
  • scaling is always removed from the surface of the workpiece by the liquid in the opposite direction to the movement of the workpiece, which contributes to a high efficiency in descaling.
  • the rotor head is arranged opposite the collecting device in such a way that the liquid is sprayed out in the direction of the collecting device, based on a projection into a plane parallel to the surface of the workpiece. This further optimizes the targeted introduction of removed scale and liquid, which bounces off the surface of the workpiece after being sprayed out of the jet nozzles, into the collecting device.
  • the spray angle between the spray direction and the direction of movement of the workpiece, in a plane parallel to the surface of the workpiece is in a range between 170 ° and 190 °, and preferably assumes the value of 180 °.
  • this advantageously leads to a targeted introduction of the removed scale and the liquid bounced off the surface of the workpiece into the collecting device, because the spray direction of the jet nozzles is not a component or a part contains, which is directed towards a side edge of the workpiece.
  • An optimal energy input is achieved for the liquid sprayed at high pressure on the surface of the workpiece in that a plurality of jet nozzles are attached to the rotor head at a different radial distance from its axis of rotation, with one jet nozzle having a greater radial distance from the Has axis of rotation, then a larger volume flow of liquid is applied than in comparison to a jet nozzle, which has a smaller radial distance from the axis of rotation.
  • This can be achieved in a simple manner by selection of a suitable type of nozzle, so that a larger amount of liquid, i.e. a correspondingly larger amount of liquid, is obtained from a jet nozzle which is arranged radially further away from the axis of rotation of the rotor head.
  • Such a configuration of a plurality of jet nozzles on the rotor head accordingly reduces the energy input for the liquid transversely to the direction of movement of the workpiece, ie. H. across its width, optimized.
  • the rotor head is arranged inclined such that its axis of rotation is inclined at an angle with respect to an orthogonal to the surface of the workpiece.
  • the jet nozzles are each firmly attached to the rotor head, so that the angle of attack, which the liquid sprayed out of the jet nozzles with an orthogonal includes the surface of the workpiece, remains constant the same.
  • the jet nozzles are preferably attached to the rotor head in such a way that their longitudinal axes run parallel to the axis of rotation of the rotor head.
  • an arrangement of rotor heads and a jet nozzle arrangement can be provided, which are arranged one behind the other and in particular adjacent to one another with respect to the direction of movement of the workpiece.
  • the present invention is either a pair of rotor heads, in which a rotor head is provided above and below a workpiece, ie on the top and bottom thereof, or a pair of rotor modules, in which - above and below the workpiece - a plurality of rotor heads are combined next to one another and transversely to the direction of movement of the workpiece.
  • a pair of rotor heads in which a rotor head is provided above and below a workpiece, ie on the top and bottom thereof, or a pair of rotor modules, in which - above and below the workpiece - a plurality of rotor heads are combined next to one another and transversely to the direction of movement of the workpiece.
  • liquid is sprayed onto the workpiece only from the jet nozzles of the arrangement of rotor heads.
  • the jet nozzles of the jet nozzle arrangement can then be switched on, so that liquid is also applied or sprayed onto the workpiece from the jet nozzles of this jet nozzle arrangement
  • the jet nozzles of both the arrangement of the rotor heads and the jet nozzle arrangement are used for descaling the workpiece.
  • the design of the jet nozzle arrangement can differ structurally from the arrangement of rotor heads. The use of both arrangements in special operations is recommended for. B. for difficult to descaling steel grades, or for stubborn scale residues that can arise, for example, by resting on oven rolls.
  • the consumption of operating resources can advantageously be minimized. This applies in the same way in the event that a plurality of rotor heads - as explained - are combined into a rotor head module. This is because only one pair of rotor modules is in use during normal operation, and a further jet nozzle arrangement, which is arranged downstream in the direction of movement of the workpiece, for example, is activated as required.
  • a scale detection device connected to a control device can be provided, which is arranged downstream of the rotor head with respect to the direction of movement of the workpiece and close to it in order to be able to detect any remaining scale on the surface of the workpiece.
  • the descaling quality of the workpiece is compared with a predetermined target specification by means of the control device and then, depending on this, a high-pressure pump unit, which is in fluid communication with the jet nozzles of the rotor head, is appropriately controlled or regulated.
  • the high-pressure pump unit can be controlled in such a way that a pressure with which liquid is sprayed out of the jet nozzles onto the surface of the workpiece is set as a function of the signals from the scale detection device. This means that the pressure for the liquid to be sprayed out is set just high enough to achieve an adequate descaling quality for the workpiece. If - as seen in the direction of movement of the workpiece - at least two jet nozzle arrangements are arranged one behind the other, it can be achieved by said control that a switchable jet nozzle arrangement is switched on in a suitable manner as a function of the signals of the scale detection device, which is the purpose of the special operation mentioned according to the invention corresponds. In comparison to a conventional two-row arrangement of rotor heads or spray bars, such a single-row arrangement, ie a single rotor head arrangement which is used in normal operation, results in substantial savings in operating media.
  • the amount of water required for clean descaling of the workpiece can be suitably minimized by varying the pressure and / or the volume flow. This leads to a saving in energy for the provision of high-pressure water, and in the same way to a reduced cooling of the workpiece as a result of a reduced amount of liquid which is sprayed onto the workpiece.
  • a distance between the rotor head and the surface of the workpiece can be adjusted. This allows adaptation to different batches of workpieces with different heights.
  • this distance between the rotor head and the surface of the workpiece is also possible to set this distance between the rotor head and the surface of the workpiece as a function of the signals from the scale detection device. For example, it can be provided in this way that, if the descaling quality is insufficient, the distance between the rotor head and the surface of the workpiece is reduced, so that a greater impact pressure is established on the surface of the workpiece in relation to the liquid sprayed thereon. Mutatis mutandis this also applies vice versa, according to which the distance of the rotor head to the surface of the workpiece, if the Descaling quality exceeds the predetermined target value, can be increased at least slightly.
  • a device 10 according to the invention serves for descaling a workpiece 12 which is moved in a direction of movement X relative to the device 10.
  • the workpiece 12 can be hot rolled material that is moved past the device 10.
  • the device 10 comprises a rotor head 14 which can be set in rotation about an axis of rotation R.
  • the rotor head 14 is rotated about its axis of rotation R by motor means (not shown), for example by an electric motor.
  • Jet nozzles 16 are attached to an end face of the rotor head 14 which faces the workpiece 12.
  • a liquid 18 (in Fig. 1 simply symbolized with dashed lines) sprayed under high pressure onto a surface 20 of the workpiece 12 in order to descale the workpiece in a suitable manner.
  • the jet nozzles 16 are in fluid communication with a high-pressure pump unit (not shown), by means of which the jet nozzles are fed with a liquid under high pressure.
  • the liquid 18 is preferably water, without being restricted to water only.
  • the device 10 comprises a collecting device 22 which is arranged upstream of the rotor head 14 with respect to the direction of movement X of the workpiece 12.
  • a collecting device 22 serves the purpose of absorbing both scale which has been removed from the surface 20 of the workpiece by means of the high-pressure liquid and the liquid which bounces off after contact with the surface 20 of the workpiece 12.
  • Fig. 1 are removed scale and the liquid bouncing off the surface 20 of the workpiece 10 is symbolized in a simplified manner by dash-dotted lines.
  • a lower guide plate 23.1 is provided, which is arranged between the rotor head 14 and the collecting device 22 and thereby directly adjoins an open area of the collecting device 22.
  • the lower guide plate 23.1 is attached to the collecting device 22 in such a way that its free end is positioned directly above the workpiece 12 and at the same time forms an angle ⁇ (with the surface 20 of the workpiece). Fig. 1 ) between 25-35 °.
  • the lower guide plate 23.1 is preferably attached such that the angle ⁇ to the surface 20 of the workpiece 12 assumes a value of 30 °.
  • the lower guide plate 23.1 is arranged in a corresponding manner to the angle ⁇ of preferably 30 ° increasing in the direction of the collecting device 22.
  • the lower guide plate 23.1 thus fulfills the function of a baffle surface and brings about a targeted entry of the scale and the liquid bounced off the surface 20 into the collecting device 22.
  • a cover device in the form of an upper cover plate 23.2 is provided, which extends from the collecting device 22 to directly on the rotor head 14 and thereby takes over the function of a cover.
  • the distance between an edge of the upper cover plate 23.2, which directly adjoins the rotor head 14, is selected such that the section between the edge of the upper cover plate 23.2 and the rotor head 14 is free of scale particles.
  • “passage-free” means that scale particles, if they are detached from the surface 20 of the workpiece 12 as a result of the water sprayed out, cannot escape between the edge of the upper cover plate 23.2 immediately adjacent to the rotor head 14 and the rotor head 14 .
  • the upper cover plate 23.2 prevents scale or liquid bouncing off the surface 20 of the workpiece 12 from escaping upward into the environment. Nevertheless, this ensures that air passes through the section between the upper cover plate 23.2 and the rotor head 14 can pass through, so that no back pressure forms below the upper cover plate 23.2 during operation of the device 10 according to the invention.
  • the jet nozzles 16 are fixedly attached to an end face of the rotor head 14 opposite the workpiece 12.
  • the longitudinal axes L of the jet nozzles 16 are aligned parallel to the axis of rotation R of the rotor head 14.
  • the spray direction S also runs accordingly (cf. Fig. 2 ), in which the liquid is sprayed out of the jet nozzles 16, parallel to the axis of rotation R of the rotor head 14.
  • the axis of rotation R is oblique with respect to an orthogonal to the surface 20 of the workpiece 12 at an angle ⁇ ( Fig. 2 ) arranged inclined.
  • This angle of attack ⁇ corresponds to an angle between the spray direction S of the liquid 18 and an orthogonal to the surface 20 of the workpiece 12. Because of the parallel alignment of the longitudinal axes L of the jet nozzles 16 with the axis of rotation R, the angle of attack ⁇ is in the embodiment of Fig. 2 equal to the angle of inclination ⁇ of the axis of rotation R.
  • the rotor head 14 is adjustable in height. This means that a distance A, which an intersection of the axis of rotation R has with the end face of the rotor head 14 to the surface 20 of the workpiece 12 ( Fig. 2 ), can be changed if necessary. In the sense of the present invention, this distance A is to be understood as the spraying distance. When reducing this Distance A increases the resulting impact pressure of the liquid 18 on the surface 20 of the workpiece 12.
  • the height adjustability for the rotor head 14 is in the Fig. 2 Simplified symbolized by the arrow "H", and can be realized by a height-adjustable bracket to which the rotor head 14 is attached. Details of an adjustment of this distance A are explained in detail below.
  • the Fig. 3 illustrates a relationship between the direction of spray S, with which the liquid 18 is sprayed out of the jet nozzles 16, and the direction of movement X, with which the workpiece 12 is moved past the device 10 or its rotor head 14.
  • Fig. 3 a projection of the spray direction S into a plane parallel to the surface 20 of the workpiece 12.
  • the spray direction S with which the liquid 18 is discharged from a nozzle mouth 17 of a jet nozzle 16, exactly opposite to the direction of movement X, ie oriented at a spray angle ⁇ of exactly 180 ° to the direction of movement X.
  • the spray direction S of the liquid 18, when it is permanently sprayed onto the workpiece 12 under high pressure, has no portion which points in the direction of a lateral edge of the workpiece 12. This ensures that the liquid 18 is always sprayed in the direction of the collecting device 22 from the jet nozzles 16 onto the surface 20 of the workpiece.
  • the removed scale, in conjunction with the liquid 18 that has rebounded from the surface 20 of the workpiece 12, is then introduced into the collecting device 22 in a targeted manner.
  • the spray angle ⁇ is greater or less than 180, for example 170 ° or 190 °, or falls within a range of values between 170 ° and 190 °.
  • the spray direction S then does not run exactly opposite to the direction of movement X, but rather includes an angle with the direction of movement X which - as explained
  • the above-described orientation of the spray direction S according to the representations according to 3a, 3b and 3c , remains unchanged or constant during a rotation of the rotor head 14 about its axis of rotation R. The same applies to the angle of attack a.
  • FIG. 4 A further embodiment for a device 10 according to the invention is shown in FIG Fig. 4 shown, namely in a basically simplified top view.
  • An arrangement 14.1 of rotor heads and a jet nozzle arrangement 14.2 are arranged one behind the other in relation to the direction of movement X of the workpiece 12.
  • the jet nozzle arrangement 14.2 can in the Fig. 4 shown example can also be designed in the form of an arrangement of rotor heads, wherein - for this example - these arrangements 14.1, 14.2 of rotor heads are referred to below as "rotor head arrangements".
  • Each of these rotor head arrangements 14.1 and 14.2 is assigned its own catch device 22, which is arranged upstream of an associated rotor head with respect to the direction of movement X of the workpiece 12.
  • a different type of jet nozzle can also be provided instead of the rotor head arrangement 14.2.
  • Fig. 4 makes it clear once again that the spray direction S, with which the liquid 18 is discharged from the jet nozzles 16 attached to a rotor head 14, does not have a portion which points in the direction of a lateral edge 13 of the workpiece 12, but instead directly to an associated collecting device 22 is directed.
  • the degree of pollution of the water is due to the reduced amount of water applied in accordance with the invention with a simultaneously improved effectiveness with scale residues or corresponding solid particles, so that a different design of the collecting device is recommended.
  • FIG. 5 shows a cross sectional view thereof.
  • a bottom surface 25 of the collecting device 22 is laterally inclined downwards.
  • the vertical line of symmetry is aligned with a center of the workpiece 12.
  • the bottom surface 25 of the collecting device 22 starting from its center, then falls off towards the side edges 24, and consequently also scale and liquid which are introduced into the collecting device 22 are moved in the direction of the side edges 24.
  • the catcher 22 is connected to a drain pipe 26, e.g. on both side wheels 24. Due to the gravitation, cleaning liquid and removed scale are discharged from the collecting device 22, e.g. in a (not shown) conveyor trough, in which the drain pipe 26 opens.
  • the discharge of cleaning liquid and scale from the collecting device 22, namely through the drain pipe 26, can be optimized by a conveying device 27 by means of which cleaning liquid and scale within the collecting device are conveyed in the direction of an opening of the drain pipe 26 or in the direction of the lateral edges 24 will.
  • the conveying device 27 may have mechanical components, for example scraper elements, conveying screws or the like, by means of which the liquid and / or the scale are conveyed in a targeted manner in the direction of an opening of the outlet pipe 26.
  • Fig. 6 shows a side view of a pair of rotor heads 29, in which a rotor head 14 is provided above and below the workpiece 12, ie both on the top and on the bottom thereof. It can be seen that the rotor head 14, which is arranged below the workpiece 12, is positioned downstream of the rotor head 14, which is arranged above the workpiece 12, with respect to the direction of movement X of the workpiece 12. This is so that, for example, liquid 18, which is sprayed from the jet nozzles 16 of the rotor head 14 arranged below the workpiece 12, does not collide with the rotor head 14 arranged above the workpiece 12 if there is no workpiece or strip material between these two rotor heads.
  • liquid 18, which is sprayed from the jet nozzles 16 of the rotor head 14 arranged below the workpiece 12 does not collide with the rotor head 14 arranged above the workpiece 12 if there is no workpiece or strip material between these two rotor heads.
  • Fig. 7 shows a frontal view of rotor head modules 30, which are respectively provided above and below the workpiece 12 and thereby a pair of rotor modules 31 form.
  • the respective rotor head modules 30 consist of a plurality of rotor heads 14 which are arranged next to one another and transversely to the direction of movement X of the workpiece. Deviating from the representation in the Fig. 7 Less or more than three rotor heads 14 can also be combined to form a rotor module 30.
  • FIG. 6 it is additionally pointed out that this is also a side view of a pair of rotor modules 31 according to FIG Fig. 7 can act, in each case only the rotor head 14 lying foremost in the paper plane can be seen on the top and bottom of the workpiece.
  • the individual rotor heads 14 are connected to a common pressurized water line D, the pressurized water line D being connected to the high-pressure pump unit. This ensures that the jet nozzles 16 attached to the rotor heads are supplied with high-pressure water.
  • rotor modules 30 are also provided, namely - because of the arrangement above and below the workpiece 12 - in the form of Rotor module pairs 31 according to Fig. 7 .
  • a rotor module 30 In a rotor module 30 according to the embodiment of FIG Fig. 7 the width of a workpiece 12, ie in a direction transverse to its direction of movement X, is covered by a plurality of rotor heads 14 as shown.
  • the width of such a rotor module 30 essentially corresponds to a width of the workpiece 12.
  • Fig. 8 symbolizes an attachment of a plurality of jet nozzles 16 on one end face of a rotor head 14.
  • three jet nozzles 16.1, 16.2 and 16.3 are provided, each having a different distance s from the axis of rotation R of the rotor head 14.
  • the axis of rotation R runs perpendicular to the plane of the drawing.
  • Fig. 8 The different distances between the respective jet nozzles 16.1, 16.2 and 16.3 are shown in Fig. 8 each designated s 1 , s 2 , and s 3 , with the proviso: s 1 > s 2 > s 3 .
  • a larger volume flow of liquid is sprayed out from a jet nozzle which has a greater radial distance from the axis of rotation R than in comparison to a jet nozzle which has a smaller distance to the axis of rotation.
  • a scale detection device 32 can be provided, which is arranged downstream of a rotor head 14 or a pair of rotor heads 29 or a pair of rotor modules with respect to the direction of movement X of the workpiece 12, for simplification only reference being made to a rotor head 14 below without being seen as a limitation.
  • Such a scale detection device 32 is arranged downstream of the rotor head 14.2.
  • the scale detection device 32 it is important for the scale detection device 32 that it is in close proximity and downstream to a rotor head (for example rotor head 14.2 according to FIG Fig. 4 ) the device 10 is arranged, at least before the workpiece 12 z. B. is subjected to a new rolling process.
  • the scale detection device 32 is connected in terms of signals to a control device 34 ( Fig. 1 , Fig. 4 ).
  • a control device 34 Fig. 1 , Fig. 4
  • the scale detection device 32 it is possible to reliably detect or detect possible remaining scale on the surface 20 of the workpiece 12 after the liquid 18 has been sprayed onto the workpiece 12.
  • the scale detection device 32 extends completely over a width of the workpiece 12.
  • a scale detection device 32 can be provided above and below the workpiece 12, that is to say on its upper side and on its lower side. Accordingly, by means of the scale detection device 32 it is possible to detect possible residual scale on both surfaces of the workpiece 12.
  • a rotor head 14 is also connected to the control device 34 for signaling purposes.
  • the control device 34 it is possible to suitably change the pressure with which the liquid sprayed from the jet nozzles 16 impinges on a surface 20 of the workpiece 20.
  • Such a change in the impact pressure of the liquid can take place, for example, by switching a pump of the high-pressure pump unit on or off, to which the pressurized water line D for the jet nozzles 16 is connected.
  • the high-pressure pump unit with which the pressure supply for the jet nozzles 16 is guaranteed, is equipped with a frequency regulator in order to achieve an even better adaptation of the desired pressure for the jet nozzles 16.
  • a rotor head 14 is connected to the control device 34 for signaling purposes.
  • the speed at which the rotor head 14 is rotated about its axis of rotation R can also be adjusted, for example, as a function of the feed rate at which the workpiece is moved past the device 10 in its direction of movement X by means of the control device 34.
  • Fig. 9a shows a section of a surface 20 of the workpiece 12 in a plan view.
  • Fig. 9b a non-optimal adaptation of the speed of the rotor head 14 to the feed speed of the workpiece 12.
  • the invention now works as follows: For a desired descaling of the surfaces 20 of a workpiece 12, this workpiece is moved in a movement direction X relative to the device 10 according to the invention.
  • rotor heads 14 of the device 10 are preferably provided both on an upper side and on an underside of the workpiece 12, according to the embodiment of FIG Fig. 6 .
  • Descaling of the workpiece 12 is achieved in that a liquid 18 is sprayed from the jet nozzles 16 attached to a rotor head 14 onto the surfaces 20 of the workpiece 12 under high pressure.
  • a liquid 18 is sprayed from the jet nozzles 16 attached to a rotor head 14 onto the surfaces 20 of the workpiece 12 under high pressure.
  • Means (not shown) are provided, by which the control device 34 receives information regarding the feed speed of the workpiece 12 in its direction of movement X.
  • a desired rotational speed for a rotor head 14 can be set by means of the control device 34, namely in adaptation to the feed speed of the workpiece 12.
  • Such an adaptation is also possible during production operation if there are fluctuations in the feed speed for the workpiece 12 .
  • the control device 34 can be set up such that the speed of rotation of a rotor head 14 is also adjusted in a controlled manner.
  • the pressure with which the jet nozzles 16 attached to a rotor head 14 are fed with the liquid 18 can be adjusted or adjusted to a predetermined value. This means that, for example, the pressure of the liquid 18 provided for the jet nozzles 16 is set just high enough that a sufficient descaling quality is achieved, which is then achieved by means of the Scale detection device 32 can be monitored. This makes it possible to save water and energy.
  • the impact pressure can be changed by adjusting the height of the rotor head arrangement.
  • This height adjustment is in the Fig. 2 , as already explained there, symbolized by the arrow "H".
  • the distance A ( Fig. 2 ), which a rotor head 14 has from the surface 20 of the workpiece 12, is adjusted or changed as a function of the signal values of the scale detection device 32.
  • this distance A can be reduced if the descaling quality of the surface 20 of the workpiece 12 is judged to be unsatisfactory, the impact pressure of the liquid 18 on the surface 20 of the workpiece 12 increasing as a result of the reduced distance A.
  • a rotor head 14.3 as shown in FIG Fig. 11 and / or a rotor head 14.4 as shown in Fig. 12 can be used.
  • the axis of rotation R likewise runs perpendicular to the surface 20 of the workpiece 12, the jet nozzles 16 being attached to the rotor head 14.4 with their longitudinal axis L parallel to the axis of rotation R.
  • the jet nozzles 16 have a suitably designed outlet opening on their respective nozzle mouth 17, through which a deflection of the ejected liquid 18 is achieved, as a result of which the in Fig. 13 shown angle of attack ⁇ results.
  • This angle of attack ⁇ remains constant during a rotation of the rotor head 14.4 about its axis of rotation in that the jet nozzles 16 are rotated about their longitudinal axis L synchronously with the rotation of the rotor head 14.4 by means of a planetary gear.
  • the rotor heads 14.3 and 14.4. can also be used in the manner of a pair of rotor heads 29 and / or in the manner of a pair of rotor modules 31, as shown in Fig. 6 or in Fig. 7 .
  • the same spray direction S can be achieved for the sprayed-out liquid 18 as in the illustration of FIG Fig. 3a is shown.
  • a Rotor head 14.3 or 14.4 also possible to set a spray direction S for at least one jet nozzle attached to such a rotor head that the resulting spray direction S forms an angle of 170 ° with the direction of movement X ( Fig. 3b ) or 190 ° ( Fig. 3c ), or includes an angle that is between 170 ° -180 ° or 180 ° -190 °.
  • the in Fig. 8 shown rotor head according to a rotor head 11 or 12 acts. It can then be provided that the spray direction S of the jet nozzle 16.2 at a spray angle ⁇ of 180 ° ( Fig. 3a ) is aligned, the spray direction S of the jet nozzle 16.1 at a spray angle ⁇ of 170 ° ( Fig. 3b ) and the spray direction S of the jet nozzle 16.3 at a spray angle ⁇ of 190 ° ( Fig. 3c ) are aligned.
  • the spray direction S of the jet nozzle 16.2 at a spray angle ⁇ of 180 ° ( Fig. 3a ) is aligned
  • the spray direction S of the jet nozzle 16.3 at a spray angle ⁇ of 190 ° ( Fig. 3c ) are aligned.
  • Fig. 12 in the same way as the rotor head 14 ( Fig. 2 ) in the embodiments according to Fig. 1 or Fig. 4 can be used.
  • the mode of operation for descaling the workpiece 12 remains unchanged, so that reference can be made to the above explanations in order to avoid repetition.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Cleaning In General (AREA)
  • Spray Control Apparatus (AREA)
EP17710888.3A 2016-03-18 2017-03-14 Vorrichtung und verfahren zum entzundern eines bewegten werkstücks Active EP3429770B1 (de)

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DE102016204570 2016-03-18
DE102016204579 2016-03-18
DE102016217561.0A DE102016217561A1 (de) 2016-03-18 2016-09-14 Vorrichtung und Verfahren zum Entzundern eines bewegten Werkstücks
DE102016217562.9A DE102016217562A1 (de) 2016-03-18 2016-09-14 Vorrichtung und Verfahren zum Entzundern eines bewegten Werkstücks
DE102016217560.2A DE102016217560A1 (de) 2016-03-18 2016-09-14 Vorrichtung und Verfahren zum Entzundern eines Werkstücks
PCT/EP2017/055996 WO2017157940A1 (de) 2016-03-18 2017-03-14 Vorrichtung und verfahren zum entzundern eines bewegten werkstücks

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EP3429770A1 (de) 2019-01-23
JP6770088B2 (ja) 2020-10-14
EP3429771A1 (de) 2019-01-23
RU2701586C1 (ru) 2019-09-30
DE102016217562A1 (de) 2017-09-21
EP3429773B1 (de) 2020-05-06
JP2019511366A (ja) 2019-04-25
EP3429771B1 (de) 2020-07-08
CN108883452B (zh) 2021-01-15
KR102141440B1 (ko) 2020-08-05
WO2017158191A1 (de) 2017-09-21
CN108778543B (zh) 2020-04-10
JP7018020B2 (ja) 2022-02-09
CN108778544A (zh) 2018-11-09
CN108778544B (zh) 2020-11-27
CN108778543A (zh) 2018-11-09
JP2019508257A (ja) 2019-03-28
RU2699426C1 (ru) 2019-09-05
DE102016217561A1 (de) 2017-09-21
KR102183495B1 (ko) 2020-11-26
KR20180117157A (ko) 2018-10-26
US11103907B2 (en) 2021-08-31
KR20180113588A (ko) 2018-10-16
KR20180117139A (ko) 2018-10-26
RU2697746C1 (ru) 2019-08-19
KR102166086B1 (ko) 2020-10-15
CN108883452A (zh) 2018-11-23
EP3429773A1 (de) 2019-01-23
US20190076900A1 (en) 2019-03-14
DE102016217560A1 (de) 2017-09-21
JP2019511367A (ja) 2019-04-25
WO2017158035A1 (de) 2017-09-21
WO2017157940A1 (de) 2017-09-21

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