DE19535788C2 - Cold descaling process - Google Patents

Cold descaling process

Info

Publication number
DE19535788C2
DE19535788C2 DE19535788A DE19535788A DE19535788C2 DE 19535788 C2 DE19535788 C2 DE 19535788C2 DE 19535788 A DE19535788 A DE 19535788A DE 19535788 A DE19535788 A DE 19535788A DE 19535788 C2 DE19535788 C2 DE 19535788C2
Authority
DE
Germany
Prior art keywords
sheets
nozzles
nozzle device
cold
semi
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 - Fee Related
Application number
DE19535788A
Other languages
German (de)
Other versions
DE19535788A1 (en
Inventor
Juergen Gaydoul
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HERMETIK HYDRAULIK TAEBY AB
Original Assignee
HERMETIK HYDRAULIK TAEBY AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by HERMETIK HYDRAULIK TAEBY AB filed Critical HERMETIK HYDRAULIK TAEBY AB
Priority to DE19535788A priority Critical patent/DE19535788C2/en
Priority to ZA968048A priority patent/ZA968048B/en
Priority to PCT/EP1996/004217 priority patent/WO1997011798A1/en
Priority to AU72816/96A priority patent/AU7281696A/en
Publication of DE19535788A1 publication Critical patent/DE19535788A1/en
Application granted granted Critical
Publication of DE19535788C2 publication Critical patent/DE19535788C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • B21B45/06—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 of strip material
    • 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

Description

Die Erfindung betrifft ein Verfahren zum Kaltentzundern von Blechen, sogenannten "Coils", insbesondere Stahlblechen, die aus dem Warmbandwalzwerk kommen und in Kaltwalzwerken zu Fertigblechen ausgewalzt werden sollen.The invention relates to a method for cold descaling Sheets, so-called "coils", in particular steel sheets, that come from the hot strip mill and in cold rolling mills should be rolled into finished sheets.

Vor dem Kaltwalzen müssen die Bleche entzundert und gerei­ nigt werden. Hierzu werden im Stand der Technik die zu Spu­ len oder "Coils" aufgerollten Bleche abgerollt und durch eine Säureanlage enthaltend eine sogenannte "Pickling Line" geführt, um die Zunderschicht zu entfernen. Eine solche Säureanlage beansprucht viel Platz, - sie kann mehrere 100 m lang und haushoch werden -, und ist wegen der verwendeten Säuren nicht umweltfreundlich. Before cold rolling, the sheets must be descaled and cleaned be inclined. For this purpose, the Spu len or "coils" rolled up sheets and rolled through an acid plant containing a so-called "pickling line" led to remove the scale layer. Such Acid system takes up a lot of space - it can be several 100 m long and high - and because of the used Acids are not environmentally friendly.  

Aus der gattungsgemäßen JP 60-112966 A ist ein Entzunderverfahren bekannt, bei dem ge­ walztes Stahlband durch eine Anordnung von in Transportrichtung hintereinander angeord­ neten Walzen hindurch transportiert und dabei abwechselnd in entgegengesetzte Richtungen quer zur Transportrichtung gebogen wird, um so ein Aufplatzen des Zunders zu bewirken. Durch die Biegeverformung wird das Stahlband um 7% gedehnt. Zum endgültigen Entfernen des Zunders wird das Stahlband mit Hochdruckwasser abgestrahlt.From the generic JP 60-112966 A a descaling process is known in which ge rolled steel strip by an arrangement of one behind the other in the direction of transport Neten rollers transported and alternately in opposite directions is bent transversely to the direction of transport in order to cause the scale to burst open. The steel strip is stretched by 7% due to the bending deformation. For permanent removal the steel strip is blasted off with high pressure water.

Aus der DE 600 053 C ist ein Verfahren zum Entzundern von feuergeschweißten Rohren be­ kannt, die nach dem Abkühlen durch ein Maßwalzwerk geschickt werden, mittels dssen der Zunder durch Walzen vorgelöst wird. Durch anschließendes Bestrahlen mit Hochdruckwasser wird der Zunder entfernt.DE 600 053 C describes a method for descaling fire-welded pipes who, after cooling, are sent through a sizing mill by means of the Tinder is pre-dissolved by rolling. By subsequent irradiation with high pressure water the tinder is removed.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art zu schaffen, das umweltfreundlich ist und Platz und Kosten spart.The invention has for its object a method of to create the kind that is environmentally friendly and saves space and costs.

Zur Lösung dieser Aufgabe sieht die Erfindung vor, daß die Bleche in kaltem Zustand um 2% oder mehr, vorzugsweise bis 10%, ihrer Ausgangslänge vorgestreckt und anschließend mit Hochdruck­ fluid, insbesondere Hochdruckwasser, bestrahlt werden.To achieve this object, the invention provides that the Cold sheets by 2% or more, preferably up to 10%, stretched out their initial length and then with high pressure fluid, especially high pressure water, are irradiated.

Das Entzundern von warmem Walzgut mittels Hochdruckwasser ist bekannt (DE 43 28 303 A1). Dabei wird warmes Walzgut mit Hochdruckwasser im Druckbereich bis etwa 1000 bar be­ strahlt und somit entzundert.Descaling hot rolled material using high pressure water is known (DE 43 28 303 A1). This creates warm rolling stock with high pressure water in the pressure range up to about 1000 bar shines and thus descaled.

Versuche der Anmelderin zum Kaltentzundern von aus dem Warmbandwalzwerk kommenden Blechen in kaltem Zustand und ohne weitere Behandlung schlugen bisher fehl. Überraschen­ derweise hat sich jedoch gezeigt, daß die Kaltentzunderung mit Hochdruckwasser dann gute Ergebnisse bringt, wenn die Bleche vorgestreckt werden, bevor sie der Hochdruckwasserbe­ strahlung unterzogen werden.Attempts by the applicant for cold descaling from Hot strip mill coming sheets in cold condition and without further treatment have so far failed. surprise however, it has been shown that cold descaling with high pressure water will bring good results if the Sheets are pre-stretched before the high pressure water be subjected to radiation.

Vorzugsweise wird zum kalten Entzundern gemäß der Erfindung eine Düsenvorrichtung eingesetzt, wie sie im einzelnen in der DE 43 28 303 A1 beschrieben ist. Eine solche Düsenvor­ richtung umfaßt mehrere, in einer Reihe quer zur Längsrich­ tung der Längsrichtung des Bleches angeordnete rotierende Düsenköpfe, relativ zu denen das Blech bewegt wird. Die Düsenköpfe sind so verteilt, daß die jeweils daran angeord­ neten Düsen, über welche das Hochdruckwasser auf die Blech­ oberfläche gespritzt wird, die Oberfläche des Bleches über dessen gesamte Breite abdecken, um eine vollständige Ent­ zunderung zu gewährleisten. Preferably for cold descaling according to the invention a nozzle device used, as detailed in DE 43 28 303 A1 is described. Such a nozzle Direction includes several, in a row across the longitudinal direction direction of the longitudinal direction of the plate arranged rotating Nozzle heads, relative to which the sheet is moved. The Nozzle heads are distributed so that they are arranged on them neten nozzles, through which the high pressure water on the sheet surface is sprayed over the surface of the sheet cover its entire width to form a complete ent to ensure scaling.  

Es ist aber auch der Einsatz einer Düsenvorrichtung mit mehreren feststehend oder oszillierend angeordneten Düsen möglich, die quer, schräg oder V-förmig über die Breite des Halbzeuges angeordnet sein können.But it is also the use of a nozzle device several fixed or oscillating nozzles possible, the transverse, oblique or V-shaped across the width of the Semi-finished product can be arranged.

Claims (8)

1. Verfahren zum Kaltentzundern dünnem Halbzeugs, wie Blechen, insbesondere Stahlble­ chen, wobei die Bleche mechanisch verformt und anschließend mit Hochdruckfluid be­ strahlt werden, dadurch gekennzeichnet, daß die Bleche in kaltem Zustand um mindestens 2% ihrer Ausgangslänge vorgestreckt werden.1. A process for cold descaling thin semi-finished products, such as sheets, in particular sheet steel, the sheets being mechanically deformed and then being blasted with high-pressure fluid, characterized in that the sheets are pre-stretched in the cold state by at least 2% of their initial length. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Bleche um bis zu 10% ihrer Ausgangslänge gestreckt werden.2. The method according to claim 1, characterized in that the sheets by up to 10% of their original length can be stretched. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Bleche mit­ tels einer Düsenvorrichtung mit Hochdruckwasser bestrahlt werden.3. The method according to claim 1 or 2, characterized in that the sheets with be irradiated with high pressure water by means of a nozzle device. 4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß die Düsenvorrichtung mehrere Düsen in einer die Breite des Halbzeugs überdeckenden Konfiguration aufweist, relativ zu denen das Blech bewegt wird.4. The method according to claim 3, characterized in that the nozzle device has a plurality of nozzles in a configuration covering the width of the semi-finished product, relative to which the sheet is moved. 5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Düsenvorrichtung mehrere rotierende Düsenköpfe aufweist, die jeweils mit einer Gruppe von Düsen be­ stückt sind.5. The method according to claim 4, characterized in that the nozzle device has a plurality of rotating nozzle heads, each with a group of nozzles pieces. 6. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Düsenvorrichtung mehrere feststehende oder oszillierende Düsen aufweist, die in einer Anordnung gradlinig und quer oder schräg zur Bewegungsrichtung des Halbzeugs gruppiert sind.6. The method according to claim 4, characterized in that the nozzle device has a plurality of fixed or oscillating nozzles which are linear in an arrangement and are grouped transversely or obliquely to the direction of movement of the semi-finished product. 7. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Düsenvorrichtung oszillierende Düsen aufweist.7. The method according to claim 4, characterized in that the nozzle device has oscillating nozzles. 8. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Düsen in einer V- förmigen Konfiguration angeordnet sind.8. The method according to claim 4, characterized in that the nozzles in a V- shaped configuration are arranged.
DE19535788A 1995-09-26 1995-09-26 Cold descaling process Expired - Fee Related DE19535788C2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE19535788A DE19535788C2 (en) 1995-09-26 1995-09-26 Cold descaling process
ZA968048A ZA968048B (en) 1995-09-26 1996-09-25 Method of cold descaling
PCT/EP1996/004217 WO1997011798A1 (en) 1995-09-26 1996-09-26 Process for cold descaling
AU72816/96A AU7281696A (en) 1995-09-26 1996-09-26 Process for cold descaling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19535788A DE19535788C2 (en) 1995-09-26 1995-09-26 Cold descaling process

Publications (2)

Publication Number Publication Date
DE19535788A1 DE19535788A1 (en) 1997-03-27
DE19535788C2 true DE19535788C2 (en) 2003-04-17

Family

ID=7773229

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19535788A Expired - Fee Related DE19535788C2 (en) 1995-09-26 1995-09-26 Cold descaling process

Country Status (2)

Country Link
DE (1) DE19535788C2 (en)
ZA (1) ZA968048B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE600053C (en) * 1933-01-14 1934-07-13 Rudolf Traut Process for descaling pipes and round bars made of metal
JPS60112966A (en) * 1983-11-21 1985-06-19 株式会社日立製作所 Liquid vibration dampening apparatus
JPS60126950A (en) * 1983-12-13 1985-07-06 Toshiba Corp Public-address telephone set
DE4328303A1 (en) * 1992-12-23 1994-06-30 Juergen Gaydoul Appts. for descaling of hot rolled material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE600053C (en) * 1933-01-14 1934-07-13 Rudolf Traut Process for descaling pipes and round bars made of metal
JPS60112966A (en) * 1983-11-21 1985-06-19 株式会社日立製作所 Liquid vibration dampening apparatus
JPS60126950A (en) * 1983-12-13 1985-07-06 Toshiba Corp Public-address telephone set
DE4328303A1 (en) * 1992-12-23 1994-06-30 Juergen Gaydoul Appts. for descaling of hot rolled material

Also Published As

Publication number Publication date
ZA968048B (en) 1997-05-06
DE19535788A1 (en) 1997-03-27

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8304 Grant after examination procedure
8364 No opposition during term of opposition
R119 Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee