EP2640552B1 - Dispositif de coupe à jet de suspension d'eau abrasive - Google Patents

Dispositif de coupe à jet de suspension d'eau abrasive Download PDF

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Publication number
EP2640552B1
EP2640552B1 EP10805762.1A EP10805762A EP2640552B1 EP 2640552 B1 EP2640552 B1 EP 2640552B1 EP 10805762 A EP10805762 A EP 10805762A EP 2640552 B1 EP2640552 B1 EP 2640552B1
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EP
European Patent Office
Prior art keywords
flow path
abrasive
main flow
pressure
cutting
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EP10805762.1A
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German (de)
English (en)
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EP2640552A1 (fr
Inventor
Marco Linde
Thorsten Rentsch
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ANT Applied New Technologies AG
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ANT Applied New Technologies AG
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Priority to PL10805762T priority Critical patent/PL2640552T3/pl
Publication of EP2640552A1 publication Critical patent/EP2640552A1/fr
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Publication of EP2640552B1 publication Critical patent/EP2640552B1/fr
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    • 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
    • B24C7/0007—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
    • B24C7/0015—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier

Definitions

  • the invention relates to a water-abrasive suspension jet cutting system according to the preamble of claim 1.
  • the first system is Water Abrasive Injection Cutting.
  • water is discharged from a nozzle under high pressure and an abrasive is added directly to the nozzle to the water jet.
  • the water emerging from the nozzle enters a mixing chamber, in which the abrasive is sucked into the liquid jet by injector action.
  • the water-abrasive-air mixture is passed through a sierrohr and strikes the workpiece. This method is used in particular for cutting metal sheets in metalworking.
  • the second known system is the water-abrasive suspension jet cutting, by means of which higher cutting performance can be achieved, ie in particular larger material thicknesses and almost all materials can be cut.
  • water is discharged under high pressure from a cutting nozzle.
  • the abrasive is not added to the nozzle but the abrasive is added under exclusion of air under system pressure, ie under high pressure, the water well before entering the nozzle. Ie. a water-abrasive mixture, ie a suspension, exits the cutting nozzle under high pressure.
  • a water-abrasive suspension cutting machine of this kind is z. B. off US 4,707,952 known.
  • the water-abrasive suspension jet cutting device has, like known suspension cutting systems, a high-pressure pump which provides water at high pressure on the output side. Furthermore, the system has a cutting nozzle, which is connected to the high-pressure pump and forms the high-pressure suspension jet for cutting. Ie. a high-pressure suspension jet (water-abrasive suspension) exits this cutting nozzle and is then used to cut a wide variety of materials, for example metal.
  • the cutting nozzle is connected to the high pressure pump a main flow path and a branched off from this Mauströmungsweg.
  • the secondary flow path passes through an abrasive pressure vessel in which the abrasive is below the system pressure of the system, ie the water pressure generated by the high pressure pump.
  • the water in the bypass passage is passed through and carries the abrasive in the pressure vessel, thus conveying the abrasive into the main flow path. In this way, a suspension is formed under high pressure, which then exits the cutting nozzle.
  • the secondary flow path opens into the main flow path at a mixing point which is located in a line section adjoining the cutting nozzle and, in particular, is located directly adjacent to the cutting nozzle or in the cutting nozzle itself.
  • the abrasive agent still remaining in the main flow path downstream of the junction of the bypass flow path will be discharged from the cutting nozzle by the continuing main flow, so that the cutting process can not be stopped immediately.
  • the abrasive center part remaining in the main flow path is minimized when turning off the flow through the bypass flow path, so that the follow-up time when shutting off the abrasive supply is shortened and the cutting process can be stopped faster.
  • the mixture between the main and secondary flow must be upstream of the actual nozzle or outlet, so that the suspension formation takes place under high pressure without air supply in order to achieve the maximum cutting performance.
  • the mixing point of the cutting nozzle upstream is arranged less than 100 cm, preferably less than 50 cm and in particular less than 30 cm apart.
  • the mixing point is movable together with the cutting nozzle.
  • the cutting nozzle is connected to the other plant components, in particular the high-pressure water supply and the Abrasivstoffzuschreib via a hose which allows the mobility of the cutting nozzle in the cutting process.
  • the mixing point at which the secondary flow with the abrasive is mixed with the main flow in the main flow path is upstream of this hose while the cutting nozzle is downstream of the hose, ie, the distance between the mixing point and the cutting nozzle may be several tens or one hundred meters.
  • the mixing point also downstream of the hose, which allows the mobility of the cutting nozzle to arrange. Ie.
  • the main flow path and the sub flow path become guided in each case as a hose or movable pipe to the cutting nozzle at least in a section so that it is compared to the rest of the system, in particular the abrasive fluid pressure vessel and the high-pressure pump, movable, but the mixing point between Fineströmungsweg and main flow can be arranged near the cutting nozzle.
  • means for generating a back pressure are present at the mixing point.
  • the means generate such a back pressure at the outlet of the first bypass flow path in the main flow path, that the backpressure prevents the suspension from flowing out of the secondary flow path into the main flow path. Ie. due to the pressure conditions is achieved that a passage of the flow is prevented from the first Fineströmungsweg in the main flow path.
  • a second secondary flow path is provided for establishing the counter-pressure at the mixing point, which branches off from the main flow path, preferably upstream of the branch point, to the first secondary flow path.
  • a check valve is disposed and the second bypass flow path also opens into the main flow path at the mixing point at which the first bypass flow path opens into the main flow path.
  • This embodiment allows a very rapid shutdown of Abrasivatorizucht in such a way that not the flow through the first Fineströmungsweg is interrupted by means of a downstream of Abrasivatori-pressure vessel located shut-off valve, but in that in the region of the mixing point, a back pressure is built up, which the outlet of the Abrasive agent suspension from the first Fineströmungsweg in the main flow path in derogation. Ie. to stop the cutting operation, the shut-off valve is opened in the second Mauströmungsweg so that it is built up at the mixing point a back pressure, which prevents the flow from the first Fineströmungsweg can enter the main flow path.
  • the second Mauströmungsweg opens at the mixing channel relative to the first Mauströmungsweg in the main flow path, so that a rapid build-up of the back pressure at the outlet of the first flow path to prevent the further flow outlet can take place from the first flow path.
  • the water-abrasive suspension jet cutting system is preferably set or adjustable such that substantially the same or a lower pressure prevails in the first secondary flow path than in the second secondary flow path when the shut-off valve is open. This ensures that, when the shut-off valve in the second bypass flow path is opened to stop the abrasive supply, the flow in the second bypass flow path at the mixing point builds up such a pressure which inhibits the exit of the suspension from the first bypass flow path into the main flow path.
  • the abrasive pressure vessel has an exit line which is part of the first bypass path and is connected to the mixing point. Through this outlet line, the suspension under high pressure is led to the mixing point, where the suspension then enters the main flow path.
  • the outlet line is additionally connected in the region of its end facing the abrasive-pressure container via a shut-off valve to the main flow path.
  • a shut-off valve to the main flow path.
  • This connection branches off from the first secondary flow path on the outlet side of the abrasive pressure vessel as close as possible adjacent to the outlet from the abrasive pressure vessel.
  • a shut-off valve is provided in this connection. This connection with the stop valve disposed therein forms a purge line or a purge valve, which is used to reduce the pressure in Abrasivsch-pressure vessel can.
  • abrasive in the discharge line between the abrasive fluid pressure vessel and the mixing point at which the discharge line or the first Mauströmungsweg is connected to the main flow path remain. This can lead to an accumulation of abrasive, which can then lead to a clogging of the cutting nozzle when restarting the system.
  • connection between the upstream end of the discharge line and the main flow path can be opened by opening the shutoff valve or purge valve located in that connection be so that pure water from the main flow path in the upstream end of the discharge line, that is preferably introduced immediately adjacent to the outlet opening of the abrasive pressure vessel and thus the outlet line is flushed.
  • the shutoff valve or purge valve located in that connection be so that pure water from the main flow path in the upstream end of the discharge line, that is preferably introduced immediately adjacent to the outlet opening of the abrasive pressure vessel and thus the outlet line is flushed.
  • a pressure reduction in the pressure vessel during shutdown of the system can be done via this connection between the outlet line and main flow.
  • the compound can also be used to prevent an uncontrolled discharge of abrasive from the abrasive fluid pressure vessel during startup of the system.
  • the pressure build-up in the abrasive fluid pressure vessel may be at least partially accomplished by opening the connection between the discharge line and the main flow path by opening the shut-off valve disposed therein, thereby forcing high pressure water into the exit side of the abrasive fluid pressure vessel and there contributes to pressure build-up. At the same time the discharge of abrasive from the pressure vessel is prevented.
  • valve is then closed in the connection between the discharge line and the main flow path, so that a transfer of suspension through this connection in the main flow path is prevented and the suspension enters the main flow path near the cutting nozzle only at the mixing point described above.
  • a shut-off valve or by-pass valve through which the flow in the first Flow path can be switched on and off.
  • the Abrasivstoffzucht can be interrupted in the main flow path and thus the cutting process, unless a back pressure at the mixing point in the manner described above is used.
  • the shut-off valve can be used to start up and shut down the system.
  • the cutting nozzle is also preferably attached to a positioning system and movable over this in at least one direction.
  • the positioning system may be part of a cutting system that can move the cutting nozzle in different directions relative to a workpiece.
  • the cutting system may, for example, have a robot which carries the cutting nozzle and can move by appropriate control in desired paths to perform along these cutting operations in a material.
  • the nozzle can be movable in at least one plane in two directions, so that it can perform any cutting operations in a flat workpiece.
  • the plant parts for abrasive agent supply in particular the abrasive fluid pressure vessel and the high-pressure pump are expediently arranged fixed so that they are not movable with the cutting nozzle and the movable cutting nozzle, as described above, via two pressure lines, one for the main flow and one for the first Mauströmungsweg, connected to the fixed system parts.
  • a second Mauströmungsweg should be provided, could still be provided a third pressure line in the form of a flexible hose.
  • the mixing point described above can be arranged directly on the movable nozzle in order to start and stop the supply of abrasive as quickly as possible.
  • the cutting system has a pressure source in the form of a high-pressure pump 2, which provides water under high pressure for the system.
  • a check valve 4 connects to the high-pressure pump. Downstream of the check valve 4, the flow path branches into a main flow path 6 and a first bypass 8.
  • the main flow path continues through a high pressure hose 10 to a mixing chamber 12 which is disposed adjacent to the cutting nozzle 14. Instead of a hose 10, a pipe could also be used.
  • the Cranströmungsweg 8 passes through a check valve or bypass valve 16 to the abrasive pressure vessel. By the Shut-off valve 16, the Mauströmungsweg 8 can be opened to the Abrasivsch-pressure vessel 18 and closed.
  • the Abrasivted-pressure vessel 18 is the abrasive and the flow through the Fineströmungsweg 8 is passed with open shut-off valve 16 through the abrasive and exits on the output side through the discharge line 20 then together with the abrasive as a suspension from the abrasive pressure vessel 18.
  • the first Fineströmungsweg 8 then runs downstream of the pressure vessel 18 through a high-pressure hose or hose 22 also to the mixing chamber 12, in which then at a mixing point 24, the flow from the first Mauströmungsweg 8 flows into the flow in the main flow path 6, so there is a diluted suspension is formed, which then flows on to the cutting nozzle 14. From the cutting nozzle 14 then exits a high-pressure water jet with abrasive, which is used for cutting a workpiece 26.
  • the cutting nozzle 14 is movable relative to the workpiece 26 via a positioning system 28, which is indicated here only by the directions of movement, to perform the desired cutting movements for forming cuts in the workpiece 26.
  • the fixed equipment parts are connected via the high-pressure hoses 10 and 22 with the mixing chamber 12 and the cutting nozzle 14.
  • the mixing chamber 12 and the cutting nozzle 14 are fixedly arranged relative to one another, in particular fixedly connected to each other or optionally also integrated into a component.
  • a second Mauströmungsweg 30 is provided, which branches off from the main flow path 6 upstream of the check valve 4 and is provided with a shut-off valve 32.
  • the second secondary flow path 30 leads via a further high-pressure hose or hose 34 to the mixing chamber 12, where it also opens into the main flow path 6 at the mixing point 24.
  • the abrasive supply can be inhibited, but also This is done by the shut-off valve 32 is opened in the second Mauströmungsweg 30, whereby additionally high-pressure water is fed to the mixing point 24 and there a back pressure to that from the first Fineströmungsweg 8 and builds up the tube 22 exiting suspension, which then prevents the exit of the suspension at the mixing point 24.
  • FIG. 3a shows the opened abrasive supply.
  • a flow through the Mauströmungsweg 8 which passes through the Abrasivstoff-pressure vessel 18 and thus promotes abrasive to the mixing point 24.
  • the suspension from the first Mauströmungsweg 8 enters the flow of the main flow path 6 and the thus diluted suspension is passed on to the cutting nozzle 14.
  • the check valve 32 in the second bypass flow path 30 is closed in this state, ie, there is no back pressure at the junction 36 of the second bypass flow path 30 in the main flow path 6, so that the flow from the bypass flow path 8 can freely enter the main flow through the main flow path 6.
  • connection 38 is connected to the first Mauströmungsweg 8 upstream of the check valve 16. Ie. this connection is independent of the position of the shut-off valve 16.
  • the connection 38 opens into the discharge line 20 at the end adjacent to the abrasive-pressure container 18, ie, upstream of the hose 22.
  • a purge valve 40 is arranged through which the connection 38 can be opened or closed.
  • this purge valve 40 When shutting down the system when the pressure in the pressure vessel 18 is reduced, this purge valve 40 can be opened, so that pure water from the main flow path 6, the abrasive pressure vessel is bridged into the outlet line 20 and the hose 22 is passed to flush it. In this way, abrasive residues, which remain in the tube 22 at shutdown, are flushed out of this.
  • the purge valve 40 is closed, so that a backflow of suspension from the abrasive pressure vessel in the main flow path 6 via the connection 38 is not possible. Even when starting up the system, the purge valve 40 can be opened, so that via the connection 38 in the outlet line 20, a pressure is built up, via which the abrasive-pressure container 18 is pressurized.
  • abrasive fluid pressure vessel 18 When the abrasive fluid pressure vessel 18 is pressurized via the exit side, unwanted discharge of abrasive is prevented when the system is started up.
  • the Pressurization can be done simultaneously by opening the shut-off valve 16 via the inlet side, so that a Abrasivstoffaustrag can be prevented in both directions when starting the system from the abrasive pressure vessel.

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

Claims (8)

  1. Dispositif de coupe à jet de suspension d'eau abrasive comprenant une pompe haute pression (2), une buse de coupe (14), une voie d'écoulement principale (6) reliant la pompe haute pression (2) à la buse de coupe (14) et une première voie d'écoulement secondaire (8) bifurquant de la voie d'écoulement principale (6) et passant à travers un réservoir d'agent abrasif sous pression (18), la première voie d'écoulement secondaire (8) débouchant dans la voie d'écoulement principale (6) en un point de mélange (24) situé dans un segment de conduit (12) adjacent à la buse de coupe (14),
    caractérisé en ce que de la voie d'écoulement principale (6) bifurque une seconde voie d'écoulement secondaire (30) dans laquelle est disposée au moins une vanne d'arrêt (32) et qui débouche dans la voie d'écoulement principale (6) au point de mélange (24) à l'opposé de la première voie d'écoulement secondaire (8).
  2. Dispositif de coupe à jet de suspension d'eau abrasive selon la revendication 1, caractérisé en ce que le point de mélange (24) est éloigné de la buse de coupe (14) dans la direction d'écoulement de moins de 100 cm, de préférence, moins de 50 cm.
  3. Dispositif de coupe à jet de suspension d'eau abrasive selon la revendication 1 ou 2, caractérisé en ce que le point de mélange (24) est déplaçable en même temps que la buse de coupe (14).
  4. Dispositif de coupe à jet de suspension d'eau abrasive selon l'une des revendications précédentes, caractérisé en ce qu'au point de mélange (24) sont prévus des moyens permettant de créer une contre-pression de nature à empêcher une sortie de l'écoulement de la première voie d'écoulement secondaire dans la voie d'écoulement principale (6).
  5. Dispositif de coupe à jet de suspension d'eau abrasive selon l'une des revendications précédentes, caractérisé en ce que le dispositif de coupe est réglé ou réglable de telle sorte qu'il règne dans la première voie d'écoulement secondaire (8) sensiblement la même pression ou une pression plus faible que dans la seconde voie d'écoulement secondaire (30) lorsque la vanne d'arrêt (32) est ouverte.
  6. Dispositif de coupe à jet de suspension d'eau abrasive selon l'une des revendications précédentes, caractérisé en ce que le réservoir d'agent abrasif sous pression (18) présente un conduit de sortie (20) qui fait partie de la première voie d'écoulement secondaire (6) et est relié au point de mélange (24), le conduit de sortie (20) étant relié, en outre, par l'intermédiaire d'une vanne d'arrêt (40), à la voie d'écoulement principale (6) dans la région de son extrémité orientée vers le réservoir d'agent abrasif sous pression (18).
  7. Dispositif de coupe à jet de suspension d'eau abrasive selon l'une des revendications précédentes, caractérisé en ce qu'une vanne d'arrêt (16) est disposée dans la première voie d'écoulement secondaire (8) côté entrée du réservoir d'agent abrasif sous pression (18).
  8. Dispositif de coupe à jet de suspension d'eau abrasive selon l'une des revendications précédentes, caractérisé en ce que la buse de coupe (14) est fixée sur un système de positionnement (28) et déplaçable par l'intermédiaire de celui-ci dans au moins une direction.
EP10805762.1A 2010-11-20 2010-11-20 Dispositif de coupe à jet de suspension d'eau abrasive Active EP2640552B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10805762T PL2640552T3 (pl) 2010-11-20 2010-11-20 Instalacja tnąca z zawiesinową strugą wodno-ścierną

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE2010/001361 WO2012065580A1 (fr) 2010-11-20 2010-11-20 Dispositif de coupe à jet de suspension d'eau abrasive

Publications (2)

Publication Number Publication Date
EP2640552A1 EP2640552A1 (fr) 2013-09-25
EP2640552B1 true EP2640552B1 (fr) 2014-11-19

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EP10805762.1A Active EP2640552B1 (fr) 2010-11-20 2010-11-20 Dispositif de coupe à jet de suspension d'eau abrasive

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EP (1) EP2640552B1 (fr)
ES (1) ES2527223T3 (fr)
PL (1) PL2640552T3 (fr)
WO (1) WO2012065580A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110691675A (zh) * 2017-03-31 2020-01-14 艾恩特应用新技术公司 水磨料悬浮液切割设备和水磨料悬浮液切割方法
CN110753602A (zh) * 2017-06-14 2020-02-04 固瑞克明尼苏达有限公司 喷砂系统

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103419140B (zh) * 2012-05-25 2016-12-14 宝山钢铁股份有限公司 一种后混合高压射流清洗用供砂浓度控制方法及装置
CH707657A1 (de) 2013-02-21 2014-08-29 Waterjet Robotics Ag C O Matthias Straubhaar Verfahren zum Bohren mindestens eines Loches in einem Werkstück mittels eines Bearbeitungsstrahls aus Flüssigkeit.
DE102014100839B4 (de) * 2014-01-24 2015-10-15 Gottfried Wilhelm Leibniz Universität Hannover Wasserabrasiv-Suspensionsschneideeinrichtung, Verfahren zu dessen Steuerung und Computerprogramm
US10189144B2 (en) * 2014-04-04 2019-01-29 Ant Applied New Technologies Ag Water-abrasive-suspension cutting system
DE212016000280U1 (de) 2016-06-02 2019-01-21 Ant Applied New Technologies Ag Wasser-Abrasiv-Suspensions-Schneidanlage
DE102019133827A1 (de) 2018-12-18 2020-06-18 Technische Universität Chemnitz Vorrichtung und Verfahren zum Schalten einer Hochdruck-Suspension

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4707952A (en) * 1986-10-01 1987-11-24 Ingersoll-Rand Company Liquid/abrasive jet cutting apparatus
GB9719550D0 (en) * 1997-09-16 1997-11-19 Miller Donald S Fluid abrasive jets for machining
GB0612944D0 (en) * 2006-06-29 2006-08-09 Bhr Group Ltd Water jet cutting apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110691675A (zh) * 2017-03-31 2020-01-14 艾恩特应用新技术公司 水磨料悬浮液切割设备和水磨料悬浮液切割方法
CN110753602A (zh) * 2017-06-14 2020-02-04 固瑞克明尼苏达有限公司 喷砂系统

Also Published As

Publication number Publication date
PL2640552T3 (pl) 2015-04-30
WO2012065580A1 (fr) 2012-05-24
ES2527223T3 (es) 2015-01-21
EP2640552A1 (fr) 2013-09-25

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