EP1060059B1 - Method for cutting steel bodies with a water jet - Google Patents

Method for cutting steel bodies with a water jet Download PDF

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Publication number
EP1060059B1
EP1060059B1 EP99915476A EP99915476A EP1060059B1 EP 1060059 B1 EP1060059 B1 EP 1060059B1 EP 99915476 A EP99915476 A EP 99915476A EP 99915476 A EP99915476 A EP 99915476A EP 1060059 B1 EP1060059 B1 EP 1060059B1
Authority
EP
European Patent Office
Prior art keywords
cutting
water
jet
water jet
high pressure
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
Application number
EP99915476A
Other languages
German (de)
French (fr)
Other versions
EP1060059A1 (en
Inventor
Egon Evertz
Rolf Seybold
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.)
Egon Evertz KG GmbH and Co
Original Assignee
Egon Evertz KG GmbH and Co
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 Egon Evertz KG GmbH and Co filed Critical Egon Evertz KG GmbH and Co
Publication of EP1060059A1 publication Critical patent/EP1060059A1/en
Application granted granted Critical
Publication of EP1060059B1 publication Critical patent/EP1060059B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/10—Means for treating work or cutting member to facilitate cutting by heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/04—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass
    • B24C1/045—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass for cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/004—Severing by means other than cutting; Apparatus therefor by means of a fluid jet

Definitions

  • the invention relates to a method for separating Steel slabs under Use a high pressure water cutter.
  • JP 09108800 A in a thin metal sheet produced by continuous casting first or to introduce several longitudinally extending grooves, which the Reduce the metal sheet thickness accordingly at these points and then the metal sheet along these grooves a high pressure water jet, to which an abrasive powder is added is to cut through before the metal sheet strips then obtained be wrapped cold.
  • the slabs processed in the context of the present invention can have a thickness of 20 cm to 25 cm.
  • the liquid metal is poured into a water-cooled mold, from which the solidified part continues during casting in the form of blocks, bars, bars, billets, tubes or cylinders is led away.
  • the strand leaving the mold passes through a cooling zone in which the strand is sprayed with water, whereby a solidification also occurs inside the strand.
  • Driving rollers guide the strand to a separator that according to the invention is arranged relatively close to the outflow nozzle and is a water jet separator.
  • the temperature of the Continuous material in the separation area is around 700 ° C.
  • the water pressure used in cutting is at least 3 x 10 8 Pa (3000 bar), but is preferably above it, in particular it is up to 7 x 10 8 Pa (7000 bar).
  • the water jet has a jet diameter of 25 ⁇ m to 0.4 mm and a nozzle exit speed between 300 and 1200 m / s.
  • abrasive agent to the water or other liquid jet or chemicals are added which have a separating effect increase or increase.
  • the device used according to the invention essentially consists from an electric motor, which is a hydraulic pump operates, which in turn the liquid medium a high pressure booster supplies. Usually used as a liquid Water is expelled through a nozzle under high pressure has the smallest possible outlet opening in diameter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Processing Of Solid Wastes (AREA)
  • Turning (AREA)
  • Metal Rolling (AREA)

Abstract

A method of cutting a body made of a metal or metal alloy which comprises heating the body to or drawing cutting to a temperature at least equal to 200° C. The metal body can be a continuously cast steel slab.

Description

Die Erfindung betrifft ein Verfahren zum Trennschneiden von Stahlbrammen unter Verwendung einer Hochdruck-Wasserschneidvorrichtung.The invention relates to a method for separating Steel slabs under Use a high pressure water cutter.

Wie bereits aus der DE 25 44 129 A1 hervorgeht, ist die Verwendung von Flüssigkeitsstrahlen als Mittel zum Schneiden oder Schleifen verschiedener Werkstoffe seit langem bekannt. Erste Veröffentlichungen zu diesem Thema beschäftigten sich mit dem Schneiden von Gesteinsformationen, Kohleschichten oder dergleichen. Neben dem Schneiden mit einem kontinuierlichen Strahl hat sich aufgrund der erreichbaren höheren Drücke das Schneiden bzw. Trennen mit einem gepulsten Strahl bewährt. Die Geschwindigkeit, mit der der Wasserstrahl die betreffende Düse verläßt, beträgt mindestens 300 m/s. Die Flüssigkeitsdrücke liegen zumeist in der Größenordnung von 3 x 108 Pa. Grundsätzlich ist auch das Schneidtrennen von Metallkörpern bis zu einer Dicke möglich und auch bereits praktiziert worden, die etwa im Bereich von 200 mm Dicke liegt. Zur Verstärkung der Schneidwirkung ist schließlich vorgeschlagen worden, der Flüssigkeit, meist einem Wasserstrahl, einen chemischen Zusatz oder Abrasivmittel, wie z.B. Granatsand (vgl. DE 44 22 769 A1), zuzusetzen. Nachteilig hierbei ist die relativ lange Dauer des Schneidvorganges, weshalb zum Trennschneiden von Brammen ein Schneidbrenner verwendet wird.As is already apparent from DE 25 44 129 A1, the use of liquid jets as a means for cutting or grinding various materials has been known for a long time. First publications on this topic dealt with the cutting of rock formations, layers of coal or the like. In addition to cutting with a continuous jet, cutting or separating with a pulsed jet has proven itself due to the higher pressures that can be achieved. The speed at which the water jet leaves the nozzle in question is at least 300 m / s. The liquid pressures are usually in the order of 3 x 10 8 Pa. Basically, the cutting of metal bodies up to a thickness is also possible and has already been practiced, which is approximately in the range of 200 mm thickness. To increase the cutting effect, it has finally been proposed to add a chemical additive or abrasive such as garnet sand to the liquid, usually a water jet (cf. DE 44 22 769 A1). The disadvantage here is the relatively long duration of the cutting process, which is why a cutting torch is used to cut slabs.

Zusätzlich ist es aus Patent Abstracts of Japan, Vol. 097, No. 008, 29. August 1997, JP 09108800 A bekannt, in ein dünnes durch Stranggießen hergestelltes Metallblech zunächst ein oder mehrere längsaxial verlaufende Nuten einzubringen, welche die Metallblechdicke an diesen Stellen entsprechend verringern und dann anschließend entlang dieser Nuten das Metallblech mittels eines Hochdruckwasserstrahles, dem ein abrasives Pulver beigegeben ist, durchzutrennen, bevor die dann erhaltenen Metallblechstreifen kalt gewickelt werden.In addition, it is from Patent Abstracts of Japan, Vol. 097, No. 008, August 29, 1997, JP 09108800 A known, in a thin metal sheet produced by continuous casting first or to introduce several longitudinally extending grooves, which the Reduce the metal sheet thickness accordingly at these points and then the metal sheet along these grooves a high pressure water jet, to which an abrasive powder is added is to cut through before the metal sheet strips then obtained be wrapped cold.

Es ist Aufgabe der vorliegenden Erfindung, ein Trennschneidverfahren mittels eines Hochdruck-Flüssigkeitsstrahles anzugeben, mit dem die Trenngeschwindigkeit bei Stahlbrammen erhöht werden kann.It is an object of the present invention to provide a cutting method to indicate by means of a high pressure liquid jet, with which the cutting speed for steel slabs is increased can.

Diese Aufgabe wird durch das Verfahren nach Anspruch 1 gelöst, daß erfindungsgemäß die Stahlbramme vor oder während des Schneidens auf Temperaturen ≥200°C erwärmt und bei dieser Temperatur geschnitten wird. Es hat sich überraschenderweise herausgestellt, daß bereits Erwärmungen auf Temperaturen von mehr als 200°C die Schnittgeschwindigkeit erheblich vergrößern. Vorzugsweise bieten sich Temperaturen oberhalb von 400 bis 600°C und darüber an.This object is achieved by the method according to claim 1, that according to the invention the steel slab before or during the Cutting heated to temperatures ≥200 ° C and at this temperature is cut. Surprisingly, it turned out that already warming up to temperatures of more than 200 ° C significantly increase the cutting speed. Preferably there are temperatures above 400 to 600 ° C and above.

Die im Rahmen der vorliegenden Erfindung bearbeiteten Brammen können eine Dicke von 20 cm bis 25 cm haben. Beim Stranggießen wird das flüssige Metall in eine wassergekühlte Kokille gegossen, aus der der erstarrte Teil während des Gießens fortlaufend in Block-, Barren-, Stangen-, Knüppel-, Rohr- oder Zylinderform weggeführt wird. Der die Kokille verlassende Strang durchläuft eine Kühlzone, in der der Strang mit Wasser besprüht wird, wodurch auch im Stranginneren eine Erstarrung eintritt. Treibrollen führen den Strang zu einer Trennvorrichtung, die erfindungsgemäß relativ nah an der Ausflußdüse angeordnet ist und eine Wasserstrahl-Trennvorrichtung ist. Die Temperatur des Stranggutes liegt im Trennbereich etwa bei 700°C.The slabs processed in the context of the present invention can have a thickness of 20 cm to 25 cm. When casting continuously the liquid metal is poured into a water-cooled mold, from which the solidified part continues during casting in the form of blocks, bars, bars, billets, tubes or cylinders is led away. The strand leaving the mold passes through a cooling zone in which the strand is sprayed with water, whereby a solidification also occurs inside the strand. Driving rollers guide the strand to a separator that according to the invention is arranged relatively close to the outflow nozzle and is a water jet separator. The temperature of the Continuous material in the separation area is around 700 ° C.

Der beim Trennschneiden aufgewendete Wasserdruck beträgt mindestens 3 x 108 Pa (3000 bar), liegt vorzugsweise jedoch darüber, insbesondere beträgt er bis zu 7 x 108 Pa (7000 bar). Der Wasserstrahl besitzt einen Strahldurchmesser von 25 µm bis 0,4 mm und eine Düsen-Austrittsgeschwindigkeit zwischen 300 und 1200 m/s. The water pressure used in cutting is at least 3 x 10 8 Pa (3000 bar), but is preferably above it, in particular it is up to 7 x 10 8 Pa (7000 bar). The water jet has a jet diameter of 25 µm to 0.4 mm and a nozzle exit speed between 300 and 1200 m / s.

Wie beim Trennschneiden von Stranggußgut grundsätzlich bekannt, wird vorzugsweise die Hochdruck-Wasserschneidvorrichtung während des Trennschneidens mit der Strangprofilgeschwindigkeit mitgeführt, die gleichzeitig die Austrittsgeschwindigkeit des Stranges aus der Gießkokille ist.As is generally known when cutting continuous cast material, will preferably use the high pressure water cutting device during cutting with the extrusion profile speed carried, which at the same time the exit speed of the Stranges from the casting mold is.

In einem konkreten Anwendungsbeispiel sind 20 cm dicke Brammen-Profile mit einem Wasserstrahl in gewünschte Längen geschnitten worden. Der aufgewendete Wasserdruck lag bei 4 x 108 Pa, die Wasserstrahlaustrittsgeschwindigkeit bei etwa 1000 m/s.In a specific application example, 20 cm thick slab profiles were cut to the desired lengths with a water jet. The water pressure applied was 4 x 10 8 Pa, the water jet outlet speed was approximately 1000 m / s.

Selbstverständlich können im Rahmen der vorliegenden Erfindung dem Wasser- oder sonstigen Flüssigkeitsstrahl auch Abrasivmittel oder Chemikalien beigegeben werden, welche die Trennwirkung erhöhen bzw. verstärken.Of course, within the scope of the present invention abrasive agent to the water or other liquid jet or chemicals are added which have a separating effect increase or increase.

Die erfindungsgemäß verwendete Vorrichtung besteht im wesentlichen aus einem elektrischen Motor, welcher eine Hydraulikpumpe betreibt, die ihrerseits das Flüssigkeitsmedium einem Hochdruckverstärker zuführt. Das meist als Flüssigkeit verwendete Wasser wird unter hohem Druck durch eine Düse ausgetrieben, die eine im Durchmesser möglichst kleine Austrittsöffnung besitzt.The device used according to the invention essentially consists from an electric motor, which is a hydraulic pump operates, which in turn the liquid medium a high pressure booster supplies. Mostly used as a liquid Water is expelled through a nozzle under high pressure has the smallest possible outlet opening in diameter.

Claims (7)

  1. Method for cutting steel slabs by using a high pressure water-jet cutting device,
    characterized in that
    the body is heated prior to or during cutting to temperatures ≥ 200°C and is cut at this temperature.
  2. Method according to claim 1, characterized in that the temperature amounts to ≥ 600°C.
  3. Method according to claim 1 or 2, characterized in that the steel slab is cut immediately after continuous casting by means of a water jet.
  4. Method according to one of claims 1 to 3, characterized in that the pressure used during water-jet cutting amounts to at least 3 x 108 Pa, preferably to 7 x 108 Pa.
  5. Method according to one of claims 1 to 4, characterized in that the water jet has a diameter of 25 µm to 0,4 mm.
  6. Method according to one of claims 1 to 5, characterized in that the water-jet exit speed ranges between 300 and 1200 m/s.
  7. Method according to one of the claims 3 to 6, characterized in that during cutting the high pressure water-jet cutting device is entrained at a speed of the continuous casting profile which at the same time is the discharge speed of the continuous casting from a mould.
EP99915476A 1998-03-02 1999-02-11 Method for cutting steel bodies with a water jet Expired - Lifetime EP1060059B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19808721A DE19808721A1 (en) 1998-03-02 1998-03-02 Process for water cutting metal bodies
DE19808721 1998-03-02
PCT/DE1999/000409 WO1999044793A1 (en) 1998-03-02 1999-02-11 Method for cutting metal bodies with a water jet

Publications (2)

Publication Number Publication Date
EP1060059A1 EP1060059A1 (en) 2000-12-20
EP1060059B1 true EP1060059B1 (en) 2002-01-23

Family

ID=7859370

Family Applications (1)

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EP99915476A Expired - Lifetime EP1060059B1 (en) 1998-03-02 1999-02-11 Method for cutting steel bodies with a water jet

Country Status (6)

Country Link
US (1) US6315640B1 (en)
EP (1) EP1060059B1 (en)
AT (1) ATE212277T1 (en)
DE (2) DE19808721A1 (en)
ES (1) ES2168010T3 (en)
WO (1) WO1999044793A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050081354A1 (en) * 2003-10-16 2005-04-21 Hydrill, Inc. Method and apparatus for rivet removal and in-situ rehabilitation of large metal structures
RU2475350C2 (en) * 2010-12-30 2013-02-20 Государственное Образовательное Учреждение Высшего Профессионального Образования "Московский Государственный Технический Университет Имени Н.Э. Баумана" Method of hydroabrasive cutting of metal sheets
BR112015011844A2 (en) * 2012-11-23 2017-07-11 Unilever Nv method of cutting a cosmetic article

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1151162B (en) 1960-06-27 1963-07-04 Siemens Ag Process for the shaping processing, in particular for cutting, of semiconductor crystals by chemical means
AU463733B2 (en) 1971-02-17 1975-07-18 The Production Engineering Research Association Of Great Britain Machining method
CA1028239A (en) 1974-10-02 1978-03-21 Flow Research Liquid jet cutting apparatus and method
FR2509210A1 (en) 1981-07-10 1983-01-14 Somalor Ferrari Somafer Ets PROCESS FOR CUTTING METAL PARTS WITH GAS JETS EMITTED AT THE PERIPHERY OF A ROTATING DISK
KR930008692B1 (en) * 1986-02-20 1993-09-13 가와사끼 쥬고교 가부시기가이샤 Abrasive water jet cutting apparatus
DE3620377A1 (en) 1986-06-18 1987-12-23 Aute Autogene Tech Method for improved separation of workpieces and device for carrying it out
DE3701673A1 (en) * 1987-01-22 1988-08-04 Juergen Dipl Ing Uehlin METHOD AND DEVICE FOR CUTTING MATERIALS BY MEANS OF A LIQUID JET
DE3730149A1 (en) 1987-09-09 1989-03-23 Messer Griesheim Gmbh METHOD AND DEVICE FOR PRODUCING SLABS AND THE LIKE FROM GIESSSRENGEN
DE4422769C2 (en) 1994-06-29 2001-02-01 Heinrich Georg Ridder High pressure water cutting device
JPH0899299A (en) 1995-07-03 1996-04-16 Sakae Denshi Kogyo Kk Liquid jet machining method
JPH09108800A (en) 1995-10-13 1997-04-28 Nippon Steel Corp Method for cutting off metallic thin sheet in thin sheet continuous casting

Also Published As

Publication number Publication date
DE19808721A1 (en) 1999-09-09
EP1060059A1 (en) 2000-12-20
ES2168010T3 (en) 2002-05-16
WO1999044793A1 (en) 1999-09-10
US6315640B1 (en) 2001-11-13
ATE212277T1 (en) 2002-02-15
DE59900767D1 (en) 2002-03-14

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