WO1997027955A1 - Verfahren zum entzundern eines werkstückes - Google Patents
Verfahren zum entzundern eines werkstückes Download PDFInfo
- Publication number
- WO1997027955A1 WO1997027955A1 PCT/AT1997/000015 AT9700015W WO9727955A1 WO 1997027955 A1 WO1997027955 A1 WO 1997027955A1 AT 9700015 W AT9700015 W AT 9700015W WO 9727955 A1 WO9727955 A1 WO 9727955A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- liquid
- rotor
- control
- workpiece
- opening
- Prior art date
Links
Classifications
-
- 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
Definitions
- the invention relates to a method for descaling a workpiece, in particular a rolling stock, the workpiece being moved past a rotor-descaling device, and in this case at least one liquid jet, which rotates about a rotation axis that intersects the surface of the workpiece to be descaled, is sprayed onto the surface to be descaled is, as well as a rotor descaling device for performing the method.
- a rotor descaling device of the type described in the introduction is known, for example, from DE-A - 43 28 303 or EP-A - 0 586 823 or DE-A - 31 25 146.
- spinning nozzles are arranged on rotating beams or rotating nozzle holders, which are directed against the workpiece surface to be descaled.
- the axis of rotation is generally perpendicular to the workpiece surface to be descaled
- liquid exposure patterns are formed by individual spray curves that are in the form of tortuous wheel lines. This results in multiple impingement of one and the same workpiece surface with liquid jets.
- the disadvantage here is the large consumption of liquid sprayed on and the associated greater cooling of the workpiece than would actually be necessary for descaling.
- the invention aims at avoiding the disadvantages and difficulties described above and has as its object to create a method and a device for carrying out the method which substantially reduce the liquid requirement enable optimal descaling.
- it should be possible not only to reduce the liquid requirement, but also to reduce the liquid pressure without having to accept any loss in terms of the quality of the surfaces to be descaled.
- double exposure to workpiece surfaces with liquid jets should be avoided.
- liquid jet is intermittent, i.e. temporarily suspended, is formed.
- a particular effect of the method according to the invention is to be seen in the fact that, due to the interruption of the liquid jet several times, pressure peaks arise which have an effect on increasing the jet pressure, thereby achieving a significant improvement in the descaling effect.
- the jet pressures of the liquid jets reach peak values that are a multiple of the constant jet pressures known in conventional processes.
- the pressures of the liquid jets on the surface of the workpiece are so high that the liquid pressure can be considerably reduced in comparison with known methods or known rotor descaling devices, although there is still an improved descaling effect compared to the prior art .
- the liquid jet is preferably maintained at most over a 180 ° rotonon.
- the liquid jet is maintained at most over a 30 ° rotation. This results in several interruptions of the liquid jet, distributed over the surface of the workpiece, and thus over the surface of the workpiece the increased jet pressures caused by the intermittent formation of the liquid jet.
- This effect can be intensified by the fact that the formation of a liquid jet is suspended two or more times in succession, but only for a short time, ie at most via a liquid jet rotation of 10 °, preferably 5 °
- a liquid jet rotation 10 °, preferably 5 °
- liquid jets are expediently formed at the same time.
- a rotor descaling device for carrying out the method according to the invention with a liquid feed line to a stator and a rotor which is rotatable relative to the stator and which is provided with at least one nozzle for forming a liquid jet is characterized in that an interruption device between the rotor and the stator, with which the liquid supply to a nozzle can be carried out intermittently.
- the interruption device is expediently formed by a control disk which is immovably arranged with respect to the stator and which is provided with at least one control opening for the purpose of time-limited passage of liquid to the nozzle.
- That the liquid feed line opens into a liquid chamber provided on the rotor
- That the rotor is provided with a passage opening which conducts the liquid to the nozzle,
- a structurally simple solution is characterized in that a plurality of passage openings is provided and each passage opening leads to a nozzle of the rotor, at least two openings of the passage openings opening at different radial distances from the axis of rotation of the rotor into the liquid chamber and the control disk correspondingly to an opening of a passage opening is provided with a control opening allowing a liquid passage from the liquid chamber to the passage opening.
- control openings are expediently provided at one and the same radial distance from the axis of rotation of the rotor, the control openings arranged at one and the same radial distance from the axis of rotation of the rotor advantageously being grouped together.
- a control opening is formed as a control slot extending in the circumferential direction of the control disk.
- the nozzles are designed as omnidirectional nozzles. In this way, compared to flat-jet nozzles, higher jet thicknesses can be achieved, since the jet is only minimally expanded in the case of omnidirectional nozzles.
- FIG. 1 illustrates a section through a rotor descaling device in a schematic representation, the section being laid through the axis of rotation ISL.
- FIG. 2 shows a view of the rotor Entzu ⁇ d ceremoniess recruited in the direction of Arrow II.
- FIG. 3 shows a partial top view of the rotor head according to line III-III of FIG. 1 and
- FIG. 4 shows a top view of a control disk according to arrow IV of FIG. 1.
- FIG. 5 illustrates a spray pattern on a rolling stock 6 illustrates the use of rotor descaling devices according to the invention for particularly wide workpieces, such as, for example, continuous casting slabs, etc.
- a rotor 4 which is rotatably mounted about an axis of rotation 3 is supported with its rotor shaft 5 via bearings 6 in a gearbox housing 2.
- a rotor head 8 is provided, which is provided with brackets 9 which extend radially outward and which carry nozzle nozzles 10.
- twelve consoles 9 are provided, which are arranged uniformly distributed around the circumference around the rotor head 8, of which one console 9 is provided with a nozzle 10.
- the Sp ⁇ tzdüsen 10 are designed as omnidirectional nozzles and are each connected in line to a passage opening 11 which extends radially inward from the spray nozzle 10 through the bracket 9 and the rotor head 8.
- the rotor shaft 5 is hollow and is penetrated inside by a hollow tube 12, the so-called stator.
- This stator 12 protrudes at one end 13 from the Transmission housing 2 and is connected with this end 13 to a pressure medium supply line 14, such as a high-pressure water line, between the stator 12 and the rotor shaft 5 or the rotor head 8, which is penetrated by the stator 12, liquid seals 15 are provided
- the rotor head 8 projecting outward end 16 of the stator 12 is a control disk 17 with control openings 18, 18 ', 18 "which is fixedly connected to the stator 12. Both the control disk 17 and the stator 12 are formed to form a cover chamber 19 (high pressure liquid chamber). covered by a cover 20 tightly attached to the rotor 8
- control openings 18, 18 ', 18 "of the control disk are provided at different radial distances n, ri and rj from the axis of rotation 3 of the rotor shaft 5, the radial distances ⁇ to n being chosen such that the Control openings 18 to 18 "in each case in alignment with the openings 21, 21 ', 21" of the passage openings 11 provided on the inner side of the rotor, which can be seen in FIG. 3, can be bungable, ie the passage openings 11 are also up to different radial distances n to r 3 from the axis of rotation 3 of the rotor shaft 5 extend inwards.
- control openings 18, 18 ', 18 " are provided at one and the same radial distance n to T) from the axis of rotation 3 of the rotor 4, which, as in FIG intangible radial distance ri provided passage openings 18 ", can be grouped together.
- the control openings 18, 18 ', 18 " can, however, also only be designed as bores, so that when the rotor head 8 rotates about the axis of rotation 3, the muzzle-like openings 21 to 21' of the passage openings 11 are only briefly in each case with the control openings 18, 18th ', 18 "of the control disc 17 which is stationary during the rotation
- control openings 18, 18 ', 18 are designed as slots so that the openings 21 to 21" of the passage openings 11 with the control slots 18, 18', 18 “are aligned with the control slots 18, 18 ', 18" over a longer range of rotation given is
- the function of the rotor descaling device 1 is as follows
- the liquid jet is formed as long as the control opening 18, 18 ', 18 "is connected by line to the corresponding passage opening 11. If this connection is interrupted, the liquid jet is interrupted and is only formed again when the next control opening 18, 18 ', 18 "- or the same control opening after rotation through 360 ° - is in turn connected to the passage opening 11 by a line. There is thus a temporary intermittent jet of liquid.
- the control disk 17 immovably attached to the stator 12 thus forms an interruption device with which the liquid supply to each nozzle 10 can be interrupted at intervals.
- control openings 18, 18 ', 18 By arranging the control openings 18, 18 ', 18 "appropriately, it is possible to generate a spray pattern, as shown, for example, in FIG. 5.
- the lines 25 similar to a circular arc illustrate the impingement of the intermittently formed liquid jets on the workpiece surface 23, while this corresponds to the feed direction shown by arrow 26 is moved past the rotor descaling device 1.
- Sections a 2 adjoining the center line 27 of the workpiece 22 are acted upon by nozzles 10, which are supplied by control openings 18 ′ arranged at an average distance r 2 from the axis of rotation 3, and the three central sections aj are controlled by the three control valves arranged closely adjacent to one another. Slots 18 ", which are arranged at the smallest distance ⁇ from the axis of rotation 3 of the rotor 4, are formed.
- FIG. 5 ai to aj are stationary (with zero feed of the workpiece), ie the position of the sections from ai to ai is not changed in the direction of rotation because the control disk is stationary.
- 6 illustrates the arrangement of a plurality of rotor descaling devices 1 for large workpiece surfaces 23, as occurs, for example, in the case of slabs or broad belts.
- nozzles 10 can be provided at different radial distances from the axis of rotation 3 of the rotor 4, and the control openings 18, 18 ', 18 "can be arranged in such a way that several nozzles 10 are acted upon simultaneously or the nozzles 10 individually one after the other intermittently with liquid .
- Groups of nozzles can also have different nozzle diameters or they can also be formed by different types of nozzles. As a result, the water exposure can be kept constant over the cross section of the workpiece to be descaled.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nozzles (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/117,618 US6149733A (en) | 1996-02-02 | 1997-01-29 | Apparatus and method for descaling a workpiece with a liquid jet |
CA002245575A CA2245575C (en) | 1996-02-02 | 1997-01-29 | Workpiece descaling process |
KR19980705830A KR19990082108A (ko) | 1996-02-02 | 1997-01-29 | 가공재의 오염물 제거방법 |
EP97901471A EP0879101B1 (de) | 1996-02-02 | 1997-01-29 | Verfahren zum entzundern eines werkstückes |
JP9527172A JP2000504277A (ja) | 1996-02-02 | 1997-01-29 | 被加工部材のデスケーリング方法 |
DE59705387T DE59705387D1 (de) | 1996-02-02 | 1997-01-29 | Verfahren zum entzundern eines werkstückes |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0019596A AT406234B (de) | 1996-02-02 | 1996-02-02 | Verfahren zum entzundern eines werkstückes |
ATA195/96 | 1996-02-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997027955A1 true WO1997027955A1 (de) | 1997-08-07 |
Family
ID=3484010
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AT1997/000015 WO1997027955A1 (de) | 1996-02-02 | 1997-01-29 | Verfahren zum entzundern eines werkstückes |
Country Status (8)
Country | Link |
---|---|
US (1) | US6149733A (de) |
EP (1) | EP0879101B1 (de) |
JP (1) | JP2000504277A (de) |
KR (1) | KR19990082108A (de) |
AT (1) | AT406234B (de) |
CA (1) | CA2245575C (de) |
DE (1) | DE59705387D1 (de) |
WO (1) | WO1997027955A1 (de) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007122236A1 (de) * | 2006-04-25 | 2007-11-01 | Airmatic Gesellschaft für Umwelt und Technik mbH | Vorrichtung zum erzeugen eines hochdruckstrahls |
WO2010115698A1 (de) | 2009-04-09 | 2010-10-14 | Siemens Vai Metals Technologies Gmbh & Co | Verfahren und vorrichtung zum aufbereiten von warmwalzgut |
WO2017108926A1 (de) * | 2015-12-23 | 2017-06-29 | Sms Group Gmbh | Vorrichtung zum entzundern eines werkstücks |
DE102015226657A1 (de) | 2015-12-23 | 2017-06-29 | Sms Group Gmbh | Rotorentzunderung |
WO2017158191A1 (de) | 2016-03-18 | 2017-09-21 | Sms Group Gmbh | Vorrichtung und verfahren zum entzundern eines bewegten werkstücks |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004060825A1 (de) * | 2004-12-17 | 2006-06-29 | Sms Demag Ag | Verfahren und Vorrichtung zum Entzundern von Oberflächen |
EP1908526A1 (de) * | 2006-10-04 | 2008-04-09 | Siemens S.A.S. | Düse für eine Zwei-Phasenmischung |
US9321067B2 (en) * | 2010-07-08 | 2016-04-26 | Federal Signal Corporation | Seal cartridge for a rotating nozzle assembly |
DE102015206393A1 (de) | 2015-04-10 | 2016-10-13 | Sms Group Gmbh | Vorrichtung zum Reinigen der Oberfläche eines Gegenstandes |
US20210316349A1 (en) * | 2018-08-21 | 2021-10-14 | Hermetik Hydraulik Ab | A Device and Method for Descaling Rolling Stock |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1159275A (fr) * | 1955-09-26 | 1958-06-25 | Dispositif de pulvérisation pour tours de refroidissement | |
DE1427555A1 (de) * | 1962-07-17 | 1968-12-12 | Ajem Lab Inc | Intermittierende Oberflaechenbearbeitung |
DE2335893A1 (de) * | 1973-06-12 | 1975-01-02 | Cerac Inst Sa | Vorrichtung zum erzeugen von pulsierenden fluessigkeitsstrahlen hoher geschwindigkeiten bei hoher impulsfrequenz |
US4151808A (en) * | 1977-03-10 | 1979-05-01 | Circle Machine Co., Inc. | Apparatus for spraying articles carried by a conveyor |
DE3125146A1 (de) * | 1981-06-26 | 1983-01-13 | Woma-Apparatebau Wolfgang Maasberg & Co Gmbh, 4100 Duisburg | Vorrichtung zum entzundern von heissen stahlbloecken |
US5220935A (en) * | 1990-12-28 | 1993-06-22 | Carolina Equipment & Supply Co., Inc. | Apparatus and method for cleaning with a focused fluid stream |
EP0586823A2 (de) * | 1992-07-31 | 1994-03-16 | DANIELI & C. OFFICINE MECCANICHE S.p.A. | Wasser verwendende Entzunderungsvorrichtung |
DE4328303A1 (de) * | 1992-12-23 | 1994-06-30 | Juergen Gaydoul | Einrichtung zum Entzundern von warmem Walzgut |
EP0640413A1 (de) * | 1993-08-23 | 1995-03-01 | Voest-Alpine Industrieanlagenbau Gmbh | Walzeinrichtung |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1044008B (de) * | 1956-11-07 | 1958-11-20 | Schloemann Ag | Spritzvorrichtung zum Entzundern von Walzgut |
SU899189A1 (ru) * | 1980-05-22 | 1982-01-23 | Днепропетровское Отделение Института Механики Ан Усср | Способ гидроабразивной очистки холодного металла от окалины |
SU1533799A1 (ru) * | 1988-06-13 | 1990-01-07 | Донецкий политехнический институт | Устройство дл гидросбива окалины с нагретых заготовок |
JPH0698379B2 (ja) * | 1990-09-28 | 1994-12-07 | 新日本製鐵株式会社 | 金属スケールの除去方法 |
-
1996
- 1996-02-02 AT AT0019596A patent/AT406234B/de not_active IP Right Cessation
-
1997
- 1997-01-29 JP JP9527172A patent/JP2000504277A/ja active Pending
- 1997-01-29 EP EP97901471A patent/EP0879101B1/de not_active Expired - Lifetime
- 1997-01-29 WO PCT/AT1997/000015 patent/WO1997027955A1/de not_active Application Discontinuation
- 1997-01-29 DE DE59705387T patent/DE59705387D1/de not_active Expired - Lifetime
- 1997-01-29 CA CA002245575A patent/CA2245575C/en not_active Expired - Fee Related
- 1997-01-29 US US09/117,618 patent/US6149733A/en not_active Expired - Lifetime
- 1997-01-29 KR KR19980705830A patent/KR19990082108A/ko not_active Application Discontinuation
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1159275A (fr) * | 1955-09-26 | 1958-06-25 | Dispositif de pulvérisation pour tours de refroidissement | |
DE1427555A1 (de) * | 1962-07-17 | 1968-12-12 | Ajem Lab Inc | Intermittierende Oberflaechenbearbeitung |
DE2335893A1 (de) * | 1973-06-12 | 1975-01-02 | Cerac Inst Sa | Vorrichtung zum erzeugen von pulsierenden fluessigkeitsstrahlen hoher geschwindigkeiten bei hoher impulsfrequenz |
US4151808A (en) * | 1977-03-10 | 1979-05-01 | Circle Machine Co., Inc. | Apparatus for spraying articles carried by a conveyor |
DE3125146A1 (de) * | 1981-06-26 | 1983-01-13 | Woma-Apparatebau Wolfgang Maasberg & Co Gmbh, 4100 Duisburg | Vorrichtung zum entzundern von heissen stahlbloecken |
US5220935A (en) * | 1990-12-28 | 1993-06-22 | Carolina Equipment & Supply Co., Inc. | Apparatus and method for cleaning with a focused fluid stream |
EP0586823A2 (de) * | 1992-07-31 | 1994-03-16 | DANIELI & C. OFFICINE MECCANICHE S.p.A. | Wasser verwendende Entzunderungsvorrichtung |
DE4328303A1 (de) * | 1992-12-23 | 1994-06-30 | Juergen Gaydoul | Einrichtung zum Entzundern von warmem Walzgut |
EP0640413A1 (de) * | 1993-08-23 | 1995-03-01 | Voest-Alpine Industrieanlagenbau Gmbh | Walzeinrichtung |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007122236A1 (de) * | 2006-04-25 | 2007-11-01 | Airmatic Gesellschaft für Umwelt und Technik mbH | Vorrichtung zum erzeugen eines hochdruckstrahls |
WO2010115698A1 (de) | 2009-04-09 | 2010-10-14 | Siemens Vai Metals Technologies Gmbh & Co | Verfahren und vorrichtung zum aufbereiten von warmwalzgut |
US8950227B2 (en) | 2009-04-09 | 2015-02-10 | Siemens Vai Metals Technologies Gmbh | Method and device for preparing hot-rolling stock |
WO2017108926A1 (de) * | 2015-12-23 | 2017-06-29 | Sms Group Gmbh | Vorrichtung zum entzundern eines werkstücks |
DE102015226658A1 (de) | 2015-12-23 | 2017-06-29 | Sms Group Gmbh | Vorrichtung zum Entzundern eines Werkstücks |
DE102015226657A1 (de) | 2015-12-23 | 2017-06-29 | Sms Group Gmbh | Rotorentzunderung |
WO2017158191A1 (de) | 2016-03-18 | 2017-09-21 | Sms Group Gmbh | Vorrichtung und verfahren zum entzundern eines bewegten werkstücks |
DE102016217562A1 (de) | 2016-03-18 | 2017-09-21 | Sms Group Gmbh | Vorrichtung und Verfahren zum Entzundern eines bewegten Werkstücks |
DE102016217561A1 (de) | 2016-03-18 | 2017-09-21 | Sms Group Gmbh | Vorrichtung und Verfahren zum Entzundern eines bewegten Werkstücks |
WO2017157940A1 (de) | 2016-03-18 | 2017-09-21 | Sms Group Gmbh | Vorrichtung und verfahren zum entzundern eines bewegten werkstücks |
Also Published As
Publication number | Publication date |
---|---|
EP0879101B1 (de) | 2001-11-14 |
JP2000504277A (ja) | 2000-04-11 |
EP0879101A1 (de) | 1998-11-25 |
DE59705387D1 (de) | 2001-12-20 |
CA2245575C (en) | 2005-06-21 |
CA2245575A1 (en) | 1997-08-07 |
US6149733A (en) | 2000-11-21 |
ATA19596A (de) | 1999-08-15 |
AT406234B (de) | 2000-03-27 |
KR19990082108A (ko) | 1999-11-15 |
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