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WO2018184798A1 - Dispositif et procédé de découpage au jet de fluide haute pression - Google Patents

Dispositif et procédé de découpage au jet de fluide haute pression Download PDF

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Publication number
WO2018184798A1
WO2018184798A1 PCT/EP2018/056345 EP2018056345W WO2018184798A1 WO 2018184798 A1 WO2018184798 A1 WO 2018184798A1 EP 2018056345 W EP2018056345 W EP 2018056345W WO 2018184798 A1 WO2018184798 A1 WO 2018184798A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid jet
pressure fluid
supply line
abrasive medium
mixing tube
Prior art date
Application number
PCT/EP2018/056345
Other languages
German (de)
English (en)
Inventor
Guenter Feucht
Felix Kulhavy
Valentin Paal
Uwe Iben
Nicolas Gooss
Peter Kroack
Florian Oberwein
Raymond Schuetzenberger
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2018184798A1 publication Critical patent/WO2018184798A1/fr

Links

Classifications

    • 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
    • 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
    • B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
    • B24C7/0053—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier
    • 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
    • B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
    • B24C7/0076—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier the blasting medium being a liquid stream

Definitions

  • the invention relates to an apparatus and a method for high-pressure fluid jet cutting, as it finds use to divide materials by means of a high pressure fluid jet or edit in any other way.
  • a fluid in particular water
  • the nozzle generates a very concentrated high-pressure fluid jet, which can be used to cut even the hardest materials.
  • workpieces can also be processed in other ways, for example delaminating, deburring or smoothing a surface.
  • an abrasive medium is often added to the high-pressure fluid jet, for example quartz sand, so that the high-pressure fluid jet entrains the abrasive medium and the fluid strikes the workpiece together with the abrasive medium. Due to the abrasive particles, the cutting effect of the fluid jet can be significantly increased, so that thicker and harder workpieces can be cut.
  • a device is known for example from DE 10 2016 220 926 AI.
  • the mixing of the high-pressure fluid jet with the abrasive medium takes place after the nozzle, that is, the already exited from the nozzle high-pressure fluid jet is mixed with the abrasive medium and then strikes the Workpiece.
  • a mixing of the high pressure fluid before exiting the nozzle usually leads to excessive wear of the nozzle and is therefore technically usually not useful.
  • the device according to the invention for high-pressure fluid jet cutting has the advantage that a simple and targeted mixing of the abrasive medium with the high-pressure fluid jet takes place and thus a good cutting effect with minimal consumption of abrasive medium is made possible.
  • the device for high-pressure fluid jet cutting has a nozzle with which a high-pressure fluid jet can be generated, and a mixing tube, which is penetrated by the high-pressure fluid jet during operation of the device.
  • a supply line opens into the mixing tube, wherein an abrasive medium can be introduced into the mixing tube via the supply line so that the abrasive medium mixes with the high-pressure fluid jet.
  • In the supply line also opens a compressed gas line, via which a gas or a gas mixture can be introduced into the supply line so that the compressed gas blows the abrasive medium into the mixing tube.
  • the abrasive medium can be effectively introduced into the mixing tube and mixes easily due to the pressure gas with the high-pressure fluid jet.
  • the necessary number of particles can be mixed with the high-pressure fluid jet and impinges on the workpiece. This can be good cutting effects or other machining of the workpiece, for example, the removal of a paint or ink layer from the workpiece.
  • a metering device is provided in the supply line, by means of which the abrasive medium is metered to the desired one Time can be introduced into the supply line.
  • the supply of the abrasive medium can be selectively controlled, in particular clocked in time.
  • the metering device comprises a metering disc which has at least one passage opening and which is mounted in the supply line so that the abrasive medium temporarily passes through the at least one passage opening by rotating the metering disk.
  • the abrasive medium can be metered in a simple manner, in that the time and the amount of the abrasive medium can be metered via the size of the opening and, in particular, via the rotational speed of the metering disk.
  • a metering valve for releasing and interrupting the compressed gas flow is provided in the compressed gas line.
  • the pressure gas flow can be controlled so that the desired amount of the abrasive medium is injected at the right time in the mixing tube and is available there.
  • the nozzle is designed to produce a pulsed fluid jet, which makes it possible to manage with the same or comparable cutting action with significantly less high-pressure fluid, the dosage of the abrasive medium can be adapted to the pulsed fluid jet.
  • the compressed gas used here is preferably air.
  • the method according to the invention for high-pressure fluid jet cutting uses the device according to the invention, the following method steps being carried out:
  • a high pressure fluid jet is generated by means of the nozzle.
  • An abrasive medium is supplied through the supply line to the mixing tube, wherein a gas or gas mixture is introduced via a compressed gas line into the feed line, so that the abrasive medium is blown by the compressed gas into the mixing tube and mixes there with the high-pressure fluid jet.
  • the mixing of the abrasive medium with the high-pressure fluid jet can be influenced in a targeted manner by the metering of the abrasive medium and by the pressure of the injected gas. so that the desired amount of abrasive medium is always mixed with the high-pressure fluid jet.
  • the method is developed to the effect that the abrasive medium is introduced by a metering device clocked in time in the supply line.
  • the compressed gas can also be injected periodically into the supply line in an advantageous manner.
  • the high-pressure fluid jet is not interrupted continuously but is temporarily interrupted and thus pulsed.
  • the abrasive medium can be introduced into the mixing tube if and only if the pulsed high-pressure fluid jet passes, so that the high-pressure fluid jet and the abrasive medium are introduced synchronously into the mixing tube. Since the abrasive medium is injected into the mixing tube just as the fluid jet passes, unnecessary abrasive media is not wasted, which reduces costs and reduces contamination of the workpiece to be machined.
  • Figure 1 shows a schematic representation of an inventive
  • Figure 2 shows a metering device according to the invention for the abrasive
  • FIG. 3 shows another embodiment of the invention
  • Dosing device also in a schematic representation. Description of the embodiments
  • FIG. 1 schematically shows a device according to the invention for high pressure fluid jet cutting.
  • the device comprises a nozzle 1, which comprises a nozzle body 4, in which a pressure chamber 2 is formed.
  • a nozzle needle 3 is arranged longitudinally displaceable, which is displaceable in the longitudinal direction by a device, not shown in the drawing and which cooperates for opening and closing a nozzle opening 9 with a nozzle seat 8.
  • the nozzle needle 3 closes the nozzle opening 9.
  • the nozzle opening 9 is opened, so that fluid under high pressure from the pressure chamber 2 via the nozzle opening 9 can escape.
  • the high-pressure fluid emerging from the nozzle opening 9 forms a high-pressure fluid jet 10, which strikes a workpiece 15 at a short distance from the nozzle 1 and thereby breaks it up.
  • the workpiece is moved during machining in accordance with the traversing directions 16 shown in the drawing.
  • high pressure fluid jet indicates the generation of the jet by high pressure; however, the jet emerging from the nozzle has ambient pressure.
  • the cutting action relies solely on the velocity of the fluid relative to the workpiece.
  • the high pressure fluid is held in a fluid tank 7 and conveyed by a high pressure pump 6 from the fluid tank 7 and compressed.
  • the compressed high-pressure fluid is passed via a high-pressure line 5 into the pressure chamber 2 of the nozzle 1.
  • the high-pressure fluid is a liquid, preferably water, which is compressed by the high-pressure pump to a pressure of, for example, 2000 bar (200 MPa).
  • the required pressure depends on the material property and the thickness of the workpiece. Also, a different pressure is usually required if the workpiece is not cut, but should be stripped, for example.
  • the abrasive medium 22 is introduced from an abrasive container 21 into the mixing tube 20, wherein for metering the abrasive medium 22, a metering device 23 is provided in the supply line 20, here in the form of a metering flap. This is designed so that the metering flap can close or release the supply line 20 with respect to the abrasive container 21 or even only releases a partial opening cross section.
  • a compressed gas line 30 through which a compressed gas can be injected into the supply line 20.
  • the compressed gas is provided by a compressor 33, which compressed the
  • Gas in the compressed gas line 30 initiates, wherein within the compressed gas line 30, a metering valve 31 is provided so that the connection from the compressor 33 to the supply line 20 can be interrupted or released.
  • the gas compressed by the compressor 33 is preferably air which is sucked in via an air inlet 34, but another gas can also be used, for example nitrogen, in order to exclude any possible contamination by the intake air.
  • the nozzle 1 shown here is designed to generate a pulsed high pressure fluid jet, i. unlike most otherwise known high pressure
  • Fluid cutting method is not a continuous high pressure fluid jet generated, but a pulsed, which is interrupted regularly.
  • the nozzle needle 3 moves periodically up and down in the longitudinal direction and thereby opens and closes the nozzle opening 9, so that the desired pulsed high-pressure fluid jet 10 is produced, which strikes the workpiece 15.
  • To improve the cutting action of the abrasive medium 22 is supplied, which can be done in various ways. Either a certain amount can be introduced through an at least partial opening of the metering device 23 via the supply line 20 into the mixing tube 12, wherein the compressed gas, which is introduced via the compressed gas line 30 into the supply line 20, the abrasive Me- entrains medium 22 and selectively injected into the high-pressure fluid jet 10.
  • the abrasive medium 22 thereby falls without effect on the workpiece 15, since it is entrained only during the duration of the high-pressure fluid jet 10, which consumes relatively much abrasive medium 22.
  • the supply of the abrasive medium 22 can also be done periodically.
  • the metering valve 31 is opened and closed in the same cycle as the high-pressure fluid jet 10, so that the compressed gas is conducted via the supply line 20 into the mixing tube 12 in synchronism with the high-pressure fluid jet 10.
  • the metering valve 31 is opened and closed in the same cycle as the high-pressure fluid jet 10, so that the compressed gas is conducted via the supply line 20 into the mixing tube 12 in synchronism with the high-pressure fluid jet 10.
  • only abrasive medium enters the mixing tube 12 when a high-pressure fluid jet 10 is present there.
  • the consumption of the abrasive medium 22 is reduced, which reduces the costs and reduces the contamination of the workpiece 15 by the ineffectively trickling abrasive medium 22.
  • FIG. 2 shows a further exemplary embodiment of the metering device 23 according to the invention, which is located in the supply line 20.
  • the supply of the abrasive medium 22 is interrupted by a metering disk 24 regularly.
  • the metering disk 24 has several
  • FIG. 3 shows a further metering device 23 according to the invention.
  • the metering device 23 here consists of a downpipe 36 through which continuously abrasive medium 22 passes or trickles, the abrasive medium flowing out of the abrasive container 20. After falling through the downpipe 36, the unnecessary abrasive medium collects in a collecting container 38, wherein this abrasive medium can be re-filled in the abrasive container 21, since it is not contaminated in the downpipe.
  • the compressed gas line 30, which opens here via the downpipe 36 into the supply line 20 is used.
  • the pressurized gas flowing through the downpipe 36 entrains abrasive particles 22 and thus introduces them into the supply line 20 and from there into the mixing tube 12.
  • the desired periodic supply of abrasive medium into the mixing tube 12 via a pulsed feeding pressurized gas by means of an interruption by the metering valve 31, which mixes in the mixing tube 12 with the high-pressure fluid jet 10.
  • the metering device 23 shown here has the particular advantage that no moving components are used, which allows a simple construction and reliable operation.
  • the amount and pressure of the introduced compressed gas can be used on the one hand for time metering, on the other hand can also be achieved by the pressure and the amount of metered gas that only a certain amount of abrasive medium is supplied to the high-pressure fluid jet.
  • the desired characteristic of the high pressure fluid jet i. his
  • Cutting action or its effect when stripping a workpiece to be targeted can also be changed during the machining of the workpiece, so that a change between cutting and stripping a workpiece can be achieved simply by supplying or not feeding of abrasive medium or different amounts of abrasive medium.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Nozzles (AREA)

Abstract

L'invention concerne un dispositif et un procédé de découpage au jet de fluide haute pression. Le dispositif comprend une buse (1) qui permet de générer un jet de fluide haute pression (10), et un tuyau mélangeur (12) qui est traversé par le jet de fluide haute pression (10) lors du fonctionnement du dispositif. Un milieu (22) abrasif peut être introduit dans le tuyau mélangeur (12) par une conduite d'amenée (20) débouchant dans le tuyau mélangeur (12) de manière à mélanger le milieu (22) abrasif au jet de fluide haute pression (10). Une conduite de gaz sous pression (30) débouche dans la conduite d'amenée (20) et permet d'introduire un gaz ou un mélange de gaz dans la conduite d'amenée (20) de telle sorte que le gaz sous pression souffle le milieu abrasif dans le tuyau mélangeur (12).
PCT/EP2018/056345 2017-04-04 2018-03-14 Dispositif et procédé de découpage au jet de fluide haute pression WO2018184798A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017205682.7A DE102017205682A1 (de) 2017-04-04 2017-04-04 Vorrichtung und Verfahren zum Hochdruck-Fluidstrahlschneiden
DE102017205682.7 2017-04-04

Publications (1)

Publication Number Publication Date
WO2018184798A1 true WO2018184798A1 (fr) 2018-10-11

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Application Number Title Priority Date Filing Date
PCT/EP2018/056345 WO2018184798A1 (fr) 2017-04-04 2018-03-14 Dispositif et procédé de découpage au jet de fluide haute pression

Country Status (2)

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DE (1) DE102017205682A1 (fr)
WO (1) WO2018184798A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111098235A (zh) * 2020-01-06 2020-05-05 中国铁建重工集团股份有限公司 一种带防回水结构的磨料水射流喷头及喷料方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019133017A1 (de) * 2019-12-04 2021-06-10 Vulkan Inox Gmbh Abrasiv zum Strahlschneiden
CN111421470A (zh) * 2020-04-29 2020-07-17 中国石油天然气集团有限公司 适用于易燃易爆环境的浆体射流切割系统及方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0582191A1 (fr) * 1992-08-03 1994-02-09 Johann Szücs Dispositif et procédé pour le traitement de surfaces sensibles, notamment de sculptures
DE10036557A1 (de) * 2000-07-27 2002-02-07 Juergen Von Der Ohe Verfahren und Vorrichtung zum Reinigen von Flächen
DE102005061401A1 (de) * 2005-12-22 2007-06-28 Robert Bosch Gmbh Verfahren zur Mikrostrukturierung einer Oberfläche eines Werkstücks
DE102008008701A1 (de) * 2008-02-11 2009-09-10 Hammelmann Maschinenfabrik Gmbh Verfahren und Vorrichtung zur Erzeugung eines Wasser-Abrasivstrahls
EP2536532B1 (fr) * 2010-02-19 2014-12-10 Inflotek B.V. Procédé de fabrication d'un insert de filtrage ou de criblage à forme stable
US20160121456A1 (en) * 2013-05-06 2016-05-05 Ice Ice Cleaning Systems S.R.O. Device for mixing solid particles of dry ice with flow of gaseous medium
DE102014226432A1 (de) * 2014-12-18 2016-06-23 Robert Bosch Gmbh Verfahren zum Flüssigkeitsstrahl-Entschichten von Oberflächen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016220926A1 (de) 2016-10-25 2018-04-26 Robert Bosch Gmbh Vorrichtung zum abrasiven Fluidstrahlschneiden

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0582191A1 (fr) * 1992-08-03 1994-02-09 Johann Szücs Dispositif et procédé pour le traitement de surfaces sensibles, notamment de sculptures
DE10036557A1 (de) * 2000-07-27 2002-02-07 Juergen Von Der Ohe Verfahren und Vorrichtung zum Reinigen von Flächen
DE102005061401A1 (de) * 2005-12-22 2007-06-28 Robert Bosch Gmbh Verfahren zur Mikrostrukturierung einer Oberfläche eines Werkstücks
DE102008008701A1 (de) * 2008-02-11 2009-09-10 Hammelmann Maschinenfabrik Gmbh Verfahren und Vorrichtung zur Erzeugung eines Wasser-Abrasivstrahls
EP2536532B1 (fr) * 2010-02-19 2014-12-10 Inflotek B.V. Procédé de fabrication d'un insert de filtrage ou de criblage à forme stable
US20160121456A1 (en) * 2013-05-06 2016-05-05 Ice Ice Cleaning Systems S.R.O. Device for mixing solid particles of dry ice with flow of gaseous medium
DE102014226432A1 (de) * 2014-12-18 2016-06-23 Robert Bosch Gmbh Verfahren zum Flüssigkeitsstrahl-Entschichten von Oberflächen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111098235A (zh) * 2020-01-06 2020-05-05 中国铁建重工集团股份有限公司 一种带防回水结构的磨料水射流喷头及喷料方法

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