EP0445103A2 - Méthode et dispositif pour le transfert de particules solides à un outil de coupage par abrasion - Google Patents

Méthode et dispositif pour le transfert de particules solides à un outil de coupage par abrasion Download PDF

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Publication number
EP0445103A2
EP0445103A2 EP91890036A EP91890036A EP0445103A2 EP 0445103 A2 EP0445103 A2 EP 0445103A2 EP 91890036 A EP91890036 A EP 91890036A EP 91890036 A EP91890036 A EP 91890036A EP 0445103 A2 EP0445103 A2 EP 0445103A2
Authority
EP
European Patent Office
Prior art keywords
solid particles
cutting
particles
loading
transport medium
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.)
Withdrawn
Application number
EP91890036A
Other languages
German (de)
English (en)
Other versions
EP0445103A3 (en
Inventor
Franz Ing. Trieb
Kurt Ing. Marchl
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.)
Boehler GmbH
Boehler GmbH Germany
Original Assignee
Boehler GmbH
Boehler GmbH Germany
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 Boehler GmbH, Boehler GmbH Germany filed Critical Boehler GmbH
Publication of EP0445103A2 publication Critical patent/EP0445103A2/fr
Publication of EP0445103A3 publication Critical patent/EP0445103A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0092—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed by mechanical means, e.g. by screw conveyors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y10T83/0591—Cutting by direct application of fluent pressure to work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/364—By fluid blast and/or suction

Definitions

  • the invention relates to a method and a device for conveying solid particles and the like to a device, in particular a remote device for loading flowable cutting jets with such particles, for example liquid jet abrasive cutting devices, particles being removed from a container, preferably in a certain amount a transport medium is introduced and fed to the cutting device and provided for loading the cutting beam.
  • Liquid jet cutting devices in which a thin, flowable jet with high kinetic energy is used as the cutting means, are used for separating flat materials.
  • abrasive cutting is required, in which the high-speed cutting jet is loaded with solid particles or cutting particles.
  • the jet emerging from a nozzle ultimately flows through a focusing nozzle, as a result of which a negative pressure is formed in the mixing chamber of the device, through which solid particles are sucked out of a container, preferably provided with a metering device.
  • Containers for the provision of the solid particles are connected to the cutting head by means of transport, for example a hose or a line, the conveyance of the particles being brought about by the negative pressure formed in the cutting head.
  • transport for example a hose or a line
  • the disadvantage here is that there is sufficient transport of solid particles the transport line is short and thus the distance of the container from the cutting head is essentially limited to a maximum of 5 m and that, in particular when the flow movement of the particles is interrupted, they can settle in the transport medium due to their higher specific weight and can lay the connecting line.
  • small containers or intermediate containers are also arranged above the cutting head in order to improve the supply of the solid particles. When the cutting bar is switched off, the particles can be unwanted to be fed into the mixing chamber due to their weight.
  • a controlled, consumption-dependent filling of the intermediate container from a remote storage container is required, with an interrupted refill with pneumatic pumping of the transport lines having to take place during pneumatic transport.
  • EP-0152223-A2 discloses a method and a device for producing cutting jets loaded with abrasive particles, wherein cutting particles can be conveyed over a distance of 100 m and more. It is provided that a carrier medium, in particular air, is fed to a Venturi device, in which abrasive particles are mixed with it from a storage container, the mixture is transported and the particles are cut off in a separator, and with a Venturi device by means of a small-diameter pipe to deliver a high pressure liquid jet.
  • a carrier medium in particular air
  • the disadvantages here are that a long time is required at the beginning, during which the solid particles are transported from the storage container to the separator, and that the cutting jet can only be switched off sensibly when the pipe and feed line are largely cleared of solid particles, because otherwise there is a risk of laying this line.
  • the invention seeks to remedy the problem and to provide a method with which, while avoiding the above disadvantages, solid particles and Abrasive particles of the same type can be fed from a supply device to a remotely located liquid cutting head and can be provided for loading a flowable cutting jet.
  • This object is achieved according to the invention in that solid particles are moved in a circuit between a supply device and a loading or intermediate storage device of a cutting device and a quantity of particles serving to load the cutting beam is removed from the circuit.
  • the advantages achieved by the invention are essentially to be seen in the fact that the solid particles can be provided for loading the cutting jet in the cutting head at any time and can be carried out independently of the operation of the cutting device or of the start of flow and the flow duration of the cutting jet.
  • the concentrations of the solid particles in the feed line to the cutting head are carried out by metered addition to a particle-free transport medium and, if appropriate, recycled particles are separated off and made available for further introduction in the supply device.
  • concentrations of the solid particles in the feed line to the cutting head are carried out by metered addition to a particle-free transport medium and, if appropriate, recycled particles are separated off and made available for further introduction in the supply device.
  • the cutting jet is switched off, it is possible to stop or prevent the metering or supply of the solid particles and to clean the lines using the transport medium. It is it is important that a pressure is adjusted at the sampling point that is lower than the ambient pressure prevailing at this point.
  • the invention is based on the further object of providing a device for conveying solid particles to a device, in particular a distant one, for loading flowable cutting jets.
  • solid particles are provided in a supply device 2.
  • the particles are fed to a mixing element 4 by means of a metering device 3, for example a chord-type conveyor 33, and are transported from the carrier medium entering through a feeder 51 through a feed line 5 to a loading device of a cutting device 1.
  • a metering device for example a chord-type conveyor 33
  • the required amount of particles is removed from the transport medium in a cavity or bypass by the action of the cutting jet or by suitable means and the transport medium with any particles remaining in this in a return line 6 of a separating and / or Utilities 2 fed.
  • This separating device 2 can be designed as a cyclone, it being advantageous if a pump 21 sucks the carrier medium, which is essentially free of solid particles, from the cyclone by means of a line 22. This makes it possible to use simpler pumps and / or to reduce pump wear. Furthermore, it is advantageous if the pressure of the transport medium in the region of the cavity of the loading device or the bypass at the intermediate storage device can be regulated and is also kept lower than the ambient pressure. In this case, in particular in the case of long and / or thin lines, the transport medium can be pressed into the feed 51 by means of a pump (not shown) and sucked off by means of a further pump 21 and the return line 6, in particular from the separating device 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Disintegrating Or Milling (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
EP19910890036 1990-02-27 1991-02-22 Method and device for feeding particles to an abrasive cutting device Withdrawn EP0445103A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT449/90 1990-02-27
AT44990 1990-02-27

Publications (2)

Publication Number Publication Date
EP0445103A2 true EP0445103A2 (fr) 1991-09-04
EP0445103A3 EP0445103A3 (en) 1992-10-21

Family

ID=3490910

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910890036 Withdrawn EP0445103A3 (en) 1990-02-27 1991-02-22 Method and device for feeding particles to an abrasive cutting device

Country Status (2)

Country Link
US (1) US5178496A (fr)
EP (1) EP0445103A3 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW277020B (en) * 1994-04-22 1996-06-01 Richihil Kk Separating device of blasting particle
US5503198A (en) * 1994-10-14 1996-04-02 Becker; James R. Method and apparatus for filling containers with dry ice pellets
US5718581A (en) * 1995-05-09 1998-02-17 Danville Manufacturing, Inc. Air abrasive particle apparatus
US5964644A (en) * 1996-03-01 1999-10-12 Extrude Hone Corporation Abrasive jet stream polishing
US6435435B1 (en) 2000-05-25 2002-08-20 Cornerstone Technologies, L.L.C. Apparatus for comminution of solid materials using a processor-controlled liquid jet
FI122784B (fi) * 2002-04-19 2012-06-29 Metso Paper Inc Järjestely puuhiomakoneen hiomakiven pinnan käsittelemiseksi
DE102007050679A1 (de) * 2007-10-21 2009-04-23 Voxeljet Technology Gmbh Verfahren und Vorrichtung zum Fördern von Partikelmaterial beim schichtweisen Aufbau von Modellen
DE102010056346A1 (de) 2010-12-29 2012-07-05 Technische Universität München Verfahren zum schichtweisen Aufbau von Modellen
US10086497B1 (en) 2012-04-27 2018-10-02 Chukar Waterjet, Inc. Submersible liquid jet apparatus
US9440370B2 (en) * 2013-06-20 2016-09-13 Mark William Hayden Re-circulating system for slurried abrasive/liquid feed to multiple abrasive water jet cutting heads
EP3632618B1 (fr) * 2018-10-04 2021-03-10 Politecnico di Milano Machine et procédé de découpe à jet d'eau abrasif, et composition comprenant des particules abrasives

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3925935A (en) * 1974-03-20 1975-12-16 Robert U Ricklefs Abrading system
US4478368A (en) * 1982-06-11 1984-10-23 Fluidyne Corporation High velocity particulate containing fluid jet apparatus and process
EP0152223A2 (fr) * 1984-02-09 1985-08-21 C. Barriquand et Fils Jets haute pression
DE3533667A1 (de) * 1985-09-20 1987-04-02 Schlick Roto Jet Masch Vorrichtung zum gleichmaessigen dosieren von koernigem strahlmittel bei pneumatisch arbeitenden strahlmittelanlagen

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1798857A (en) * 1925-08-31 1931-03-31 Alva W Tyler Method for continuous calcination of gypsum
US2770924A (en) * 1954-04-01 1956-11-20 William H Mead Instant stop and start blasting device
US3073070A (en) * 1960-10-12 1963-01-15 William H Mead Abrasive blasting system
US3828478A (en) * 1973-06-25 1974-08-13 E Bemis Fluid-jet-abrasive device and system
FR2373469A1 (fr) * 1976-12-10 1978-07-07 Colmant Cuvelier Dispositif de stockage et d'extraction pour produits pulverulents
US4232487A (en) * 1978-05-25 1980-11-11 Knox Manufacturing Co. Abrading device
US4333277A (en) * 1980-07-28 1982-06-08 Tasedan Robert T Combination sand-blasting and vacuum apparatus
US4555872A (en) * 1982-06-11 1985-12-03 Fluidyne Corporation High velocity particulate containing fluid jet process
CA1231235A (fr) * 1982-10-22 1988-01-12 Mohammed Hashish Methode et appareil de production d'un jet de liquide abrasif haute velocite
JPS6234778A (ja) * 1985-08-06 1987-02-14 Niigata Eng Co Ltd サンドブラストによる物体の加工方法
US4945688A (en) * 1985-10-22 1990-08-07 Electric Power Research Institute, Inc. Nozzle for entraining abrasive granules within a high pressure fluid jet and process of using same
KR930008692B1 (ko) * 1986-02-20 1993-09-13 가와사끼 쥬고교 가부시기가이샤 어브레시브 워터 제트 절단방법 및 장치
NL8603134A (nl) * 1986-12-09 1988-07-01 Ltc Int Bv Straalschuurinrichting.
US4829724A (en) * 1988-01-11 1989-05-16 Rohr Industries, Inc. Cutting abrasive feeder, demand type

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3925935A (en) * 1974-03-20 1975-12-16 Robert U Ricklefs Abrading system
US4478368A (en) * 1982-06-11 1984-10-23 Fluidyne Corporation High velocity particulate containing fluid jet apparatus and process
EP0152223A2 (fr) * 1984-02-09 1985-08-21 C. Barriquand et Fils Jets haute pression
DE3533667A1 (de) * 1985-09-20 1987-04-02 Schlick Roto Jet Masch Vorrichtung zum gleichmaessigen dosieren von koernigem strahlmittel bei pneumatisch arbeitenden strahlmittelanlagen

Also Published As

Publication number Publication date
US5178496A (en) 1993-01-12
EP0445103A3 (en) 1992-10-21

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