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EP1060059A1 - Method for cutting metal bodies with a water jet - Google Patents

Method for cutting metal bodies with a water jet

Info

Publication number
EP1060059A1
EP1060059A1 EP99915476A EP99915476A EP1060059A1 EP 1060059 A1 EP1060059 A1 EP 1060059A1 EP 99915476 A EP99915476 A EP 99915476A EP 99915476 A EP99915476 A EP 99915476A EP 1060059 A1 EP1060059 A1 EP 1060059A1
Authority
EP
European Patent Office
Prior art keywords
cutting
water
metal
water jet
jet
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.)
Granted
Application number
EP99915476A
Other languages
German (de)
French (fr)
Other versions
EP1060059B1 (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

Links

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 bodies from a metal or a metal alloy using a high-pressure water cutting device.
  • a particular application in the context of the present invention is seen in the cutting of a metal or metal alloy strand, which can have slab sizes with a thickness of 20 cm to 25 cm.
  • the liquid metal is poured into a water-cooled mold, from which the solidified part is continuously removed in the form of blocks, bars, bars, billets, tubes or cylinders during casting.
  • the strand leaving the mold passes through a cooling zone in which the strand is sprayed with water, as a result of which solidification also occurs inside the strand.
  • Driving rollers guide the strand to a separating device which, according to the invention, is arranged relatively close to the outflow nozzle and is a water jet separating device.
  • the temperature of the strand material in the separation area is approximately 700 ° C.
  • the water pressure used for 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 ⁇ 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.
  • the high-pressure water cutting device is preferably carried along during the cutting process at the extrusion profile speed, which is at the same time the speed at which the strand emerges from the casting mold.
  • the device used according to the invention essentially consists of an electric motor which operates a hydraulic pump which in turn supplies the liquid medium to a high-pressure booster.
  • the water which is mostly used as a liquid, is expelled under high pressure through a nozzle which has an outlet opening that is as small as possible 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

Beschreibung description
Verfahren zum Wassertrennschneiden von MetallkörpernProcess for water cutting metal bodies
Die Erfindung betrifft ein Verfahren zum Trennschneiden von Körpern aus einem Metall oder einer Metallegierung unter Verwendung einer Hochdruck-Wasserschneidvorrichtung.The invention relates to a method for separating bodies from a metal or a metal alloy using a high-pressure water cutting device.
Wie bereits aus der DE 25 44 129 AI 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 10^ 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 Abrasiv- mittel, wie z.B. Granatsand (vgl. DE 44 22 769 AI), zuzusetzen. Nachteilig hierbei ist die relativ lange Dauer des Schneidvorganges, weshalb zum Trennschneiden von Brammen ein Schneidbrenner verwendet wird.As can be seen from DE 25 44 129 AI, 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 of the order of 3 x 10 ^ 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. Finally, to increase the cutting action, it has been proposed to add a chemical additive or abrasive, such as e.g. Garnet sand (see. DE 44 22 769 AI) to add. The disadvantage here is the relatively long duration of the cutting process, which is why a cutting torch is used to cut slabs.
Es ist Aufgabe der vorliegenden Erfindung, ein Trennschneidverfahren mittels eines Hochdruck-Flüssigkeitsstrahles anzugeben, mit dem die Trenngeschwindigkeit bei Metall- oder Metallegierungsstücken erhöht werden kann.It is an object of the present invention to provide a cutting process using a high-pressure liquid jet, with which the cutting speed in the case of pieces of metal or metal alloy can be increased.
Diese Aufgabe wird durch das Verfahren nach Anspruch 1 gelöst, daß erfindungsgemäß der Metall- oder Metallegierungskörper vor oder während des Schneidens auf Temperaturen >200°C erwärmt 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 the metal or metal alloy body according to the invention or heated to temperatures> 200 ° C during cutting. Surprisingly, it has been found that even heating to temperatures of more than 200 ° C. increases the cutting speed considerably. Temperatures above 400 to 600 ° C. and above are preferred.
Ein besonderer Anwendungsfall im Rahmen der vorliegenden Erfindung wird im Trennschneiden eines Metall- oder Metallegierungsstranges gesehen, der Brammengrößen mit einer Dicke von 20 cm bis 25 cm haben kann. 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.A particular application in the context of the present invention is seen in the cutting of a metal or metal alloy strand, which can have slab sizes with a thickness of 20 cm to 25 cm. In continuous casting, the liquid metal is poured into a water-cooled mold, from which the solidified part is continuously removed in the form of blocks, bars, bars, billets, tubes or cylinders during casting. The strand leaving the mold passes through a cooling zone in which the strand is sprayed with water, as a result of which solidification also occurs inside the strand. Driving rollers guide the strand to a separating device which, according to the invention, is arranged relatively close to the outflow nozzle and is a water jet separating device. The temperature of the strand material in the separation area is approximately 700 ° C.
Der beim Trennschneiden aufgewendete Wasserdruck beträgt mindestens 3 x lθ8 pa (3000 bar), liegt vorzugsweise jedoch darüber, insbesondere beträgt er bis zu 7 x 10^ 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 for 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 ^ 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 in the cutting of continuous cast material, the high-pressure water cutting device is preferably carried along during the cutting process at the extrusion profile speed, which is at the same time the speed at which the strand emerges from the casting mold.
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 10° Pa, die Wasserstrahlaustrittsgeschwindigkeit bei etwa 1000 m/s.In a specific application example, 20 cm thick slab profiles are cut to the desired lengths with a water jet been. The water pressure applied was 4 x 10 ° Pa, the water jet outlet speed was around 1000 m / s.
Selbstverständlich können im Rahmen der vorliegenden Erfindung dem Wasser- oder sonstigen Flüssigkeitsstrahl auch Abrasivmit- tel oder Chemikalien beigegeben werden, welche die Trennwirkung erhöhen bzw. verstärken.In the context of the present invention, it is of course also possible to add abrasive agents or chemicals to the water or other liquid jet which increase or increase the separating action.
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 of an electric motor which operates a hydraulic pump which in turn supplies the liquid medium to a high-pressure booster. The water, which is mostly used as a liquid, is expelled under high pressure through a nozzle which has an outlet opening that is as small as possible in diameter.

Claims

Patentansprüche claims
1. Verfahren zum Trennschneiden von Körpern aus einem Metalloder Metallegierung unter Verwendung einer Hochdruck-Wasserschneidvorrichtung, d a d u r c h g e k e n n z e i c h n e t, daß der Körper vor oder während des Schneidens auf Temperaturen >200°C erwärmt wird.1. A method for separating bodies from a metal or metal alloy using a high-pressure water cutting device, so that the body is heated to temperatures> 200 ° C. before or during the cutting.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Temperatur >600°C beträgt.2. The method according to claim 1, characterized in that the temperature is> 600 ° C.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Körper ein Metallstrang, vorzugsweise eine Stahlbramme ist, der bzw. die unmittelbar nach dem Stranggießen mittels eines Wasserstrahles getrennt wird.3. The method according to claim 1 or 2, characterized in that the body is a metal strand, preferably a steel slab, or which is separated immediately after the continuous casting by means of a water jet.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der beim Wassertrennschneiden aufgewendete Wasserdruck mindestens 3 x 10- pa^ vorzugsweise bis zu 7 x 10^ Pa beträgt.4. The method according to any one of claims 1 to 3, characterized in that the water pressure applied during water cutting is at least 3 x 10- p a ^ preferably up to 7 x 10 ^ Pa.
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Wasserstrahl einen Strahldurchmesser von 25 μm bis 0,4 mm aufweist.5. The method according to any one of claims 1 to 4, characterized in that the water jet has a jet diameter of 25 microns to 0.4 mm.
6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Wasserstrahl-Austrittsgeschwindigkeit zwischen 300 und 1200 m/s liegt.6. The method according to any one of claims 1 to 5, characterized in that the water jet exit speed is between 300 and 1200 m / s.
7. Verfahren nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, daß die Hochdruck-Wasserschneidvorrichtung während des Trennschneidens mit der Strangprofilgeschwindigkeit mitgeführt wird, die gleichzeitig die Austrittsgeschwindigkeit des Stranges aus einer Gießkokille ist. 7. The method according to any one of claims 3 to 6, characterized in that the high-pressure water cutting device is carried during the cutting at the extrusion profile speed, which is at the same time the exit speed of the strand from a casting mold.
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 true EP1060059A1 (en) 2000-12-20
EP1060059B1 EP1060059B1 (en) 2002-01-23

Family

ID=7859370

Family Applications (1)

Application Number Title Priority Date Filing Date
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 thin metal plate in continuous thin plate casting

Non-Patent Citations (1)

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Title
See references of WO9944793A1 *

Also Published As

Publication number Publication date
ATE212277T1 (en) 2002-02-15
WO1999044793A1 (en) 1999-09-10
EP1060059B1 (en) 2002-01-23
US6315640B1 (en) 2001-11-13
ES2168010T3 (en) 2002-05-16
DE19808721A1 (en) 1999-09-09
DE59900767D1 (en) 2002-03-14

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