EP0159977A2 - Fluid jet cutter - Google Patents
Fluid jet cutter Download PDFInfo
- Publication number
- EP0159977A2 EP0159977A2 EP85890097A EP85890097A EP0159977A2 EP 0159977 A2 EP0159977 A2 EP 0159977A2 EP 85890097 A EP85890097 A EP 85890097A EP 85890097 A EP85890097 A EP 85890097A EP 0159977 A2 EP0159977 A2 EP 0159977A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- jet
- medium
- pressure
- outlet opening
- liquid
- 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
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Classifications
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
- B05B12/085—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to flow or pressure of liquid or other fluent material to be discharged
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- 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
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- 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 liquid jet cutting device with a cutting head which can be supplied by means of a high pressure device via feeds with liquid medium at high pressure, with a housing and jet outlet opening and at least one organ for regulating the supply of the liquid medium to the outlet opening.
- Such cutting devices have been in use in various designs for cutting a wide variety of materials for a long time.
- the aim is to automate the cutting process, e.g. program-controlled coordinate guidance of the nozzle can take place over a good arranged on a cutting table.
- Such automatic devices are 'of interest not only for objects with a complicated contour, but in particular also when e.g. a large number of similar elements, e.g. Smaller ring-shaped elements or the like are to be cut sequentially from a sheet of material.
- the task was to create a facility that is as simple and safe as possible, in which the slightest changes in the cutting beam automatically result in a warning for the maintenance personnel and / or an interruption of the medium delivery to the cutting head.
- the invention thus relates to a liquid jet cutting device of the type mentioned at the outset, which is characterized in that a gas space, preferably surrounded by a wall of a channel which is not touched by the medium jet, is arranged immediately downstream of the outlet opening and is penetrated by the medium jet, preferably via a pressure transmission line ,
- a pressure sensor is connected to an encoder that can be set to a desired pressure threshold value, which in turn is connected to a warning device that can be actuated when the set pressure threshold value is reached or fallen below or exceeded, and / or actuating device for actuating the organ for regulating to block or switch off the
- the supply of the medium to the jet outlet opening is operatively connected, mostly from the gas, preferably defined by a channel wall, through which the medium jet passes Airspace, for example a line, which in a simple embodiment can be connected, for example, to a mercury U-tube manometer, the poles of a circuit having a power supply being arranged, for example, in the leg with negative pressure, the
- the pressure measurement sensor connected to the gas chamber close to the jet is arranged in the wall of the jet outlet channel itself.
- Piezocrystals, membranes, strain gauges or the like may be mentioned as examples.
- the advantage of such an embodiment is that practically only flexible electrical lines leave the cutting head which practically do not interfere.
- the gas space traversed by the medium jet is preferably connected via an opening in the wall of the channel and via a pressure transmission line to a pressure sensor with a membrane-controlled switch.
- the measuring tool is a membrane, the reaction of which to a specific setpoint can be set. If the setpoint is reached when the pressure changes, for example by falling below or exceeding it, the membrane will act connected microswitch opened and closed and thus a circuit for an actuator of a shut-off element in the medium supply system or a shut-off element of the high pressure apparatus, the switching point being changeable with an adjusting screw on the sensor. In this way, commercially available pressure switches can be set to the respective outlet opening cross-section, medium pressure and the medium composition used in each case.
- the cutting head needs as little space as possible and a commercially available pressure switch is still used, it is convenient to place the transfer line inside the head, e.g. the nozzle holder is angled, i.e. as is preferred in the simplest case, at first approximately perpendicular to the beam direction, and then still inside the head, housing or the like, essentially parallel to it. This can be an advantage e.g. then be when the outlet end of the cutting head has its own drive device for exact traversing of contours.
- liquid medium is brought to a pressure of up to several kbar and via line 87, 71 with flow control element 7, for example by means of a not shown, e.g. program-controlled servomotors supplied with cutting contours that can be guided by the cutting contour, the area of which has the outlet opening for the bundled cutting beam 21 is shown enlarged in the figure.
- the liquid medium 2 under high pressure enters the. Interior 11 of a housing 10, which is closed at the bottom by means of a nut 12 which is screwed to housing 10 and a holder 12 held by it and having the nozzle outlet opening 13.
- a nozzle-coaxial jet discharge channel 15 is arranged in the holder 12, with the wall 151 of which the cutting jet 21 pressed through the opening 13 does not come into contact and leaves an annular gas space 18 free.
- a transfer line 16 branches off from the channel 15 from the opening 152, preferably approximately at a right angle. This line 16 then runs outwards through a sleeve 17 and further via a preferably flexible guide, e.g. through a pressure-resistant hose 19 and opens into a vacuum sensor 3 with membrane 31 and pressure threshold value adjustment screw 32.
- the membrane 31 of sensor 3 is connected to a switch 4 as a transmitter.
- Actuator supplying, a current source 51 circuit 5 current flow switched on and thus the actuator 6 controlled to actuate the shut-off element 7, which e.g. can be a three-way valve, so that the pressure medium can then be circulated via an interrupted return line 78 until the nozzle or the like has been replaced.
- a current source 51 circuit 5 current flow switched on and thus the actuator 6 controlled to actuate the shut-off element 7, which e.g. can be a three-way valve, so that the pressure medium can then be circulated via an interrupted return line 78 until the nozzle or the like has been replaced.
- a broken line indicates in the figure how line 5 'is led to a switch 81 of the high-pressure apparatus, with which the switch itself is switched off in order to interrupt the cutting beam in the event of its change, and furthermore an angular guidance of the transfer line with a branch parallel to the beam 16 'indicated in the holder 12 of the cutting head 1, which can simplify manipulation.
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- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
Die Erfindung betrifft eine Flüssigstrahlschneideinrichtung mit mittels Hochdruckeinrichtung über Zuführungen mit flüssigem Medium (2) hohen Drucks versorgbarem Schneidkopf (1) mit Gehäuse (10) und Strahl-Austrittsöffnung (13) und mindestens einem Organ zur Regelung der Zufuhr des flüssigen Mediums (2) zur Austrittsöffnung (13), wobei mit einem von einer vorzugsweise vom Mediumsstrahl (21) nicht berührten Wandung (151) eines Kanals (15) umschlossenen, vorzugsweise unmittelbar, stromabwärts der Austrittsöffnung (13) angeordneten, vom Mediumsstrahl (21) durchsetzten Gasraum (18), vorzugsweise über eine Druckübertragungsleitung (16), ein Drucksensor (3) mit auf einen gewünschten Druckschwellenwert einstellbarem Geber (4) in Verbindung steht, der seinerseits mit einer bei Erreichen bzw. Unter- oder Überschreiten des eingestellten Druckschwellenwertes betätigbaren Warneinrichtung und/oder Stelleinrichtung (6) zur Betätigung des Organes (7, 81) zur Regelung, vorzugsweise zum Sperren bzw. Abschalten der Zufuhr des Mediums (2) zur Strahlaustrittsöffnung (13) wirkverbunden ist.The invention relates to a liquid jet cutting device with a cutting head (1) which can be supplied by means of a high pressure device via feeds with liquid medium (2) at high pressure, with a housing (10) and jet outlet opening (13) and at least one organ for regulating the supply of the liquid medium (2) Outlet opening (13), with a gas space (18) which is enclosed by a wall (151) of a channel (15) which is preferably not in contact with the medium jet (21), preferably arranged immediately downstream of the outlet opening (13) and penetrated by the medium jet (21) , preferably via a pressure transmission line (16), is connected to a pressure sensor (3) with an encoder (4) that can be set to a desired pressure threshold value, which in turn is connected to a warning device and / or actuating device that can be actuated when the set pressure threshold value is reached or exceeded or exceeded. 6) for actuating the organ (7, 81) for regulation, preferably for locking or para switching the supply of the medium (2) to the jet outlet opening (13) is operatively connected.
Description
Die Erfindung betrifft eine Flüssigstrahlschneideinrichtung mit mittels Hochdruckeinrichtung über Zuführungen mit flüssigem Medium hohen Drucks versorgbarem Schneidkopf mit Gehäuse und Strahl-Austrittsöffnung und mindestens einem Organ zur Regelung der Zufuhr des flüssigen Mediums zur Austrittsöffnung.The invention relates to a liquid jet cutting device with a cutting head which can be supplied by means of a high pressure device via feeds with liquid medium at high pressure, with a housing and jet outlet opening and at least one organ for regulating the supply of the liquid medium to the outlet opening.
Derartige Schneideinrichtungen sind seit längerer Zeit in verschiedenen Ausführungen zum Schneiden verschiedenster Materialien in Gebrauch. Um ihre hohe Arbeitsgeschwindigkeit optimal zu nutzen, besteht das Bestreben, den Schneidvorgang zu automatisieren, wobei z.B. programmgesteuerte Koordinatenführung der Düse über einem auf einem Schneidtisch angeordneten Gut erfolgen kann. Derartige automatische Einrichtungen sind 'nicht nur für Gegenstände mit komplizierter Kontur, sondern insbesondere auch dann von Interesse, wenn z.B. eine große Zahl gleichartiger Elemente, wie z.B. kleinere ringförmige Elemente od. dgl., sequentiell aus einem Materialblatt zu schneiden sind.Such cutting devices have been in use in various designs for cutting a wide variety of materials for a long time. In order to make optimum use of their high working speed, the aim is to automate the cutting process, e.g. program-controlled coordinate guidance of the nozzle can take place over a good arranged on a cutting table. Such automatic devices are 'of interest not only for objects with a complicated contour, but in particular also when e.g. a large number of similar elements, e.g. Smaller ring-shaped elements or the like are to be cut sequentially from a sheet of material.
Bei derartigen automatischen Anlagen ist in wesentlich höherem Maße als bei handgeführten Geräten das Bestreben gegeben, den Schneidstrahl durch automatische Abschaltung der Flüssigkeitsförderung zur Schneiddüse zu unterbrechen, wenn z.B. infolge Veränderung der Strahlaustrittsöffnung durch Verschleiß,deren teilweise Verlegung mit im Schneidmedium enthaltenen Mikro-Teilchen od. dgl. oder durch Änderungen bei der Zudosierung von Polymer zum Medium od. dgl., eine Veränderung der Geometrie bzw. der Eigenschaften des Schneidstrahles eintritt, wodurch die Qualität der Schneidkonturen der Produkte mitten im Schneidprozeß schlagartig absinkt. Um dadurch bedingten Produktionsausfall bzw. Ausschuß möglichst geringzuhalten, war die Aufgabe gestellt, eine möglichst einfache und sicher arbeitende Einrichtung zu schaffen, bei welcher bei geringsten Veränderungen im Schneidstrahl eine Warnung für das Wartungspersonal und/oder eine Unterbrechung der Mediumsförderung zum Schneidkopf automatisch erfolgt.In such automatic systems, there is a tendency to interrupt the cutting beam by automatically switching off the liquid supply to the cutting nozzle, for example as a result of a change in the beam outlet opening due to wear, its partial laying with micro-particles contained in the cutting medium, or to a greater extent than with hand-held devices. Like. Or by changes in the metering of polymer to the medium or the like, a change in the geometry or the properties of the cutting beam occurs, whereby the quality of the cutting contours of the products in the middle Cutting process drops suddenly. In order to keep the resulting loss of production or rejects as low as possible, the task was to create a facility that is as simple and safe as possible, in which the slightest changes in the cutting beam automatically result in a warning for the maintenance personnel and / or an interruption of the medium delivery to the cutting head.
Es wurde gefunden, daß der die Düse verlassende Schneidstrahl im ihn unmittelbar umgebenden Gasraum nach dem Ejektor-Prinzip Gas-Unterdruck bewirkt, wobei die aufgebaute Druckdifferenz zum Umgebungs-Luftdruck selbst auf kleinste Änderungen in Struktur und/oder Zusammensetzung des Schneidstrahles empfindlich und äußerst rasch reagiert.It has been found that the cutting jet leaving the nozzle in the gas space immediately surrounding it effects gas negative pressure according to the ejector principle, the pressure difference built up to the ambient atmospheric pressure being sensitive and extremely rapid even to the smallest changes in the structure and / or composition of the cutting jet .
Gegenstand der Erfindung ist somit eine Flüssigstrahlschneideinrichtung der eingangs genannten Art, die dadurch gekennzeichnet ist, daß mit einem, vorzugsweise von einer vom Mediumsstrahl nicht berührten Wandung eines Kanales umschlossenen, vorzugsweise unmittelbar, stromabwärts der Austrittsöffnung angeordneten, vom Mediumsstrahl durchsetzten Gasraum, vorzugsweise über eine Druckübertragungsleitung,ein Drucksensor mit auf einen gewünschten Druckschwellenwert einstellbarem Geber in Verbindung steht, der seinerseits mit einer bei Erreichen bzw. Unter- oder Überschreiten des eingestellten Druck-Schwellenwertes betätigbaren Warneinrichtung" und/ oder Stelleinrichtung zur Betätigung des Organes zur Regelung zum Sperren bzw. Abschalten der Zufuhr des Mediums zur Strahlaustrittsöffnung wirkverbunden ist. Es geht von dem, vorzugsweise durch eine Kanalwandung definierten, vom Mediumsstrahl durchsetzten Gas-, meist Luftraum, beispielsweise eine Leitung aus, die in einer einfachen Ausführungsform, z.B. mit einem Quecksilber-U-Rohr-Manometer verbunden sein kann, wobei z.B. im Schenkel mit Unterdruck die Pole eines eine Stromversorgung aufweisenden Stromkreises angeordnet sind, der mit einem Betätigungsorgan für ein Absperrorgan für das Medium verbunden ist. Ändert sich bei Änderung des Strahles der Unterdruck, steigt das Quecksilber im Schenkel höher und bei Berührung mit den Polen erfolgt Stromfluß, der die Betätigung des Sperrorganes oder einer Abschalteinrichtung der Hochdrückapparatur bewirkt.The invention thus relates to a liquid jet cutting device of the type mentioned at the outset, which is characterized in that a gas space, preferably surrounded by a wall of a channel which is not touched by the medium jet, is arranged immediately downstream of the outlet opening and is penetrated by the medium jet, preferably via a pressure transmission line , A pressure sensor is connected to an encoder that can be set to a desired pressure threshold value, which in turn is connected to a warning device that can be actuated when the set pressure threshold value is reached or fallen below or exceeded, and / or actuating device for actuating the organ for regulating to block or switch off the The supply of the medium to the jet outlet opening is operatively connected, mostly from the gas, preferably defined by a channel wall, through which the medium jet passes Airspace, for example a line, which in a simple embodiment can be connected, for example, to a mercury U-tube manometer, the poles of a circuit having a power supply being arranged, for example, in the leg with negative pressure, the circuit having an actuating member for a shut-off element connected to the medium. If the vacuum changes when the jet changes, the mercury rises higher in the leg and when it comes into contact with the poles, current flows, which actuates the blocking element or a shut-off device of the push-up device.
Insbesondere für Schneideinrichtungen mit geringem Freiraum im Bereich des Strahlaustrittes ist es vorteilhaft, wenn der mit dem strahlnahen Gasraum in Verbindung stehende Druckmeßsensor in der Wandung des Strahlaustritts-Kanals selbst angeordnet ist. Als Beispiele seien etwa Piezokristalle, Membranen, Dehn-Meßstreifen od. dgl. genannt. Vorteil einer solchen Ausführungsform ist, daß praktisch nur flexible elektrische Leitungen den Schneidkopf verlassen, die praktisch nicht stören.In particular for cutting devices with little free space in the area of the jet outlet, it is advantageous if the pressure measurement sensor connected to the gas chamber close to the jet is arranged in the wall of the jet outlet channel itself. Piezocrystals, membranes, strain gauges or the like may be mentioned as examples. The advantage of such an embodiment is that practically only flexible electrical lines leave the cutting head which practically do not interfere.
Gemäß einer weiteren Variante kann vorteilhafterweise vorgesehen sein, daß der vom Mediumsstrahl durchsetzte Gasraum vorzugsweise über eine Öffnung in der Wandung des Kanals und über eine Druckübertragungsleitung mit einer Druckmeßdose mit membrangesteuertem Schalter verbunden ist.According to a further variant, it can advantageously be provided that the gas space traversed by the medium jet is preferably connected via an opening in the wall of the channel and via a pressure transmission line to a pressure sensor with a membrane-controlled switch.
In diesem auch als Druckwächter bezeichneten Sensor ist das Meßwerkzeug eine Membrane, deren Reaktion auf einen bestimmten Sollwert einstellbar ist. Kommt es nun bei Druckänderungen zur Erreichung des Sollwertes z.B. durch Unter- oder Überschreitung, so wird ein mit der Membran verbundener Mikroschalter geöffnet bzw. geschlossen und damit ein Stromkreis für ein Stellorgan eines Absperrorganes im Mediumszuführungssystem oder eines Abschaltorgans der Hochdruckapparatur, wobei der Schaltpunkt mit einer Einstellschraube am Sensor veränderbar ist. Auf diese Weise lassen sich handelsübliche Druckwächter auf jeweiligen Austrittsöffnungsquerschnitt, Mediumsdruck und jeweils eingesetzte Mediumszusammensetzung einstellen. Es hat sich gezeigt, daß z.B. bei etwa 0,3 mm Schneid-Strahldurchmesser und einem Mediumsdruck von 3,5 kbar am Drucksensor Druckdifferenzen von etwa 0,06 bar und bei 0,12 mm Strahldurchmesser und 1 kbar Mediumsdruck immer noch etwa 0,003 bar Druckdifferenz auftreten. Bei kleinsten Veränderungen der Düse schnellt allerdings - wie gefunden wurde - diese Druckdifferenz relativ unabhängig von der Düsengröße auf Werte von über 0,1 bar hoch, sodaß eine eindeutige und sicher wirksame Regelgröße gegeben ist.In this sensor, which is also referred to as a pressure switch, the measuring tool is a membrane, the reaction of which to a specific setpoint can be set. If the setpoint is reached when the pressure changes, for example by falling below or exceeding it, the membrane will act connected microswitch opened and closed and thus a circuit for an actuator of a shut-off element in the medium supply system or a shut-off element of the high pressure apparatus, the switching point being changeable with an adjusting screw on the sensor. In this way, commercially available pressure switches can be set to the respective outlet opening cross-section, medium pressure and the medium composition used in each case. It has been shown that, for example, with a cutting beam diameter of approximately 0.3 mm and a medium pressure of 3.5 kbar, pressure differences of approximately 0.06 bar at the pressure sensor and a pressure difference of approximately 0.003 bar at 0.12 mm beam diameter and 1 kbar medium pressure occur. With the smallest changes to the nozzle, however, as found, this pressure difference rises to values of more than 0.1 bar, relatively independently of the nozzle size, so that a clear and reliably effective control variable is provided.
Soll der Schneidkopf möglichst wenig Platzbedarf aufweisen, und dennoch ein handelsüblicher Druckwächter Einsatz finden, ist es günstig, die Überführungsleitung innerhalb des Kopfes, z.B. der Düsenhalterung abgewinkelt, d.h. wie im einfachsten Fall bevorzugt, zuerst etwa senkrecht zur Strahlrichtung, und dann noch innerhalb des Kopfes, Gehäuses od. dgl. im wesentlichen parallel zu ihr zu führen. Von Vorteil kann dies z.B. dann sein, wenn das Austritts-Ende des Schneidkopfes eine eigene Antriebseinrichtung zum exakten Abfahren von Konturen aufweist.If the cutting head needs as little space as possible and a commercially available pressure switch is still used, it is convenient to place the transfer line inside the head, e.g. the nozzle holder is angled, i.e. as is preferred in the simplest case, at first approximately perpendicular to the beam direction, and then still inside the head, housing or the like, essentially parallel to it. This can be an advantage e.g. then be when the outlet end of the cutting head has its own drive device for exact traversing of contours.
Erwähnt sei noch, daß den Arten des Druck- bzw. Unterdrucksensors, des Gebers, sowie des Stell- und Sperr- bzw. Abschaltorganes praktisch keine Grenzen gesetzt sind. Anhand der Figur, die ein Schema einer bevorzugten Flüssigstrahlschneidanlage mit vergrößertem und teilgeschnittenem Schneidkopf zeigt, wird die Erfindung näher erläutert.It should also be mentioned that there are practically no limits to the types of pressure or vacuum sensor, the transmitter, and the actuating and locking or shutdown element. The invention is explained in more detail with reference to the figure, which shows a diagram of a preferred liquid jet cutting system with an enlarged and partially cut cutting head.
In einer Hochdruckeinrichtung 8, z.B. Hochdruckpumpe, Druckverstärker od. dgl., wird flüssiges Medium auf einen Druck von bis zu mehreren kbar gebracht und über Leitung 87, 71 mit Durchflußregelorgan 7 einem beispielsweise mittels nicht gezeigten, z.B. programmgesteuerten Stellmotoren schneidkonturmäßig führbaren Schneidkopf 1 zugeführt, dessen die Austrittsöffnung für den gebündelten Schneidstrahl 21 aufweisender Bereich in der Figur vergrößert dargestellt ist. Das unter hohem Druck stehende flüssige Medium 2 gelangt in den. Innenraum 11 eines Gehäuses 10,der nach unten hin mittels Uberwurfmutterartig mit Gehäuse 10 verschraubter Halterung 12 und einem von ihr gehaltenen, die Strahlaustrittsöffnung 13 aufweisenden Düsenstein 14 abgeschlossen ist. Stromabwärts des Düsensteines 14 ist in der Halterung 12 ein düsenkoaxialer Strahl-Ablaufkanal 15 angeordnet, mit dessen Wandung 151 der durch Öffnung 13 gepreßte Schneidstrahl 21 nicht in Berührung kommt und einen ringförmigen Gasraum 18 freiläßt. Von dem Kanal 15 zweigt von Öffnung 152 eine Überführungsleitung 16, vorzugsweise etwa rechtwinkelig ab. Diese Leitung 16 verläuft nach außen hin dann durch eine Hülse 17 und weiter über eine vorzugsweise flexible Führung, z.B. durch einen druckfesten Schlauch 19 und mündet in einen Unterdrucksensor 3 mit Membran 31 und Druck-Schwellenwert-Einstellschraube 32. Die Membran 31 von Sensor 3 ist mit einem Schalter 4 als Geber verbunden. Bei Erreichen des Schwellenwertes, z.B. wenn die Druckdifferenz infolge Geometrieänderung des Schneidstrahles stark ansteigt oder, z.B. bei Druckabfall oder Mediumszusammensetzung,abfällt, wird im ein Stellorgan 6, z.B.In a high pressure device 8, e.g. High-pressure pump, pressure booster or the like, liquid medium is brought to a pressure of up to several kbar and via
Stellmotor versorgenden, eine Stromquelle 51 aufweisenden Stromkreis 5 Stromfluß eingeschaltet und damit das Stellorgan 6 zur Betätigung des Absperrorganes 7 gesteuert, das z.B. ein Dreiwegventil sein kann, sodaß dann das Druckmedium solange über eine unterbrochen angedeutete Rückführleitung 78 im Kreislauf geführt werden kann, bis Auswechseln der Düse od. dgl. erfolgt ist.Actuator supplying, a
In unterbrochener Linie angedeutet ist in der Figur, wie Leitung 5'zu einem Schalter 81 der Hochdruck-Apparatur geführt ist, mit welchem diese selbst zum Unterbrechen des Schneidstrahles im Falle von dessen Veränderung abgeschaltet wird und weiters ist eine winkelige Führung der Uberführungsleitung mit strahlparallelem Ast 16' in der Halterung 12 des Schneidkopfes 1 angedeutet, die Manipulationsvereinfachungen mit sich bringen kann.A broken line indicates in the figure how line 5 'is led to a
Es hat sich gezeigt, daß mit der erfindungsgemäßen, einfach gebauten Einrichtung ein hohes Maß an Fertigungssicherheit und Ausschußminimierung bei Flüssigstrahlschneidanlagen zu erreichen ist.It has been shown that with the simply constructed device according to the invention, a high degree of manufacturing safety and reject minimization can be achieved in liquid jet cutting systems.
Claims (5)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT1367/84 | 1984-04-25 | ||
| AT0136784A AT380422B (en) | 1984-04-25 | 1984-04-25 | LIQUID JET CUTTER |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0159977A2 true EP0159977A2 (en) | 1985-10-30 |
| EP0159977A3 EP0159977A3 (en) | 1988-06-01 |
| EP0159977B1 EP0159977B1 (en) | 1990-06-27 |
Family
ID=3512345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP85890097A Expired - Lifetime EP0159977B1 (en) | 1984-04-25 | 1985-04-18 | Fluid jet cutter |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4594924A (en) |
| EP (1) | EP0159977B1 (en) |
| JP (1) | JPS60228100A (en) |
| AT (1) | AT380422B (en) |
| DE (1) | DE3578396D1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992020456A1 (en) * | 1991-05-17 | 1992-11-26 | Ingersoll-Rand Company | Integrity sensor for fluid jet nozzle |
| US5232155A (en) * | 1991-05-17 | 1993-08-03 | Ingersoll-Rand Company | Integrity sensor for fluid jet nozzle |
| FR2687090A1 (en) * | 1992-02-12 | 1993-08-13 | Cdpsi Sarl | Method and machine for cutting bread using medium-pressure water jets |
| FR2699852A1 (en) * | 1992-12-29 | 1994-07-01 | Gaz De France | Machining by controlled high-pressure fluid jet |
| EP3012075A1 (en) * | 2014-10-20 | 2016-04-27 | Andreas Perndorfer | Method for operating a facility for waterjet cutting and facility for water jet cutting |
| CN107243935A (en) * | 2017-07-31 | 2017-10-13 | 重庆良能机械有限公司 | A kind of palm fibre pad cutter device |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5198144A (en) * | 1988-04-01 | 1993-03-30 | Kao Corporation | Bathing preparation |
| US4934111A (en) * | 1989-02-09 | 1990-06-19 | Flow Research, Inc. | Apparatus for piercing brittle materials with high velocity abrasive-laden waterjets |
| US5599223A (en) * | 1991-04-10 | 1997-02-04 | Mains Jr.; Gilbert L. | Method for material removal |
| US5222332A (en) * | 1991-04-10 | 1993-06-29 | Mains Jr Gilbert L | Method for material removal |
| US5339715A (en) * | 1993-09-02 | 1994-08-23 | Davidson Textron Inc. | Programmable pressure control system |
| US6006637A (en) * | 1995-04-18 | 1999-12-28 | Kimberly-Clark Worldwide, Inc. | Servo driven watercutter |
| US6155245A (en) * | 1999-04-26 | 2000-12-05 | Zanzuri; Clement | Fluid jet cutting system and method |
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| DE102014225247A1 (en) * | 2014-12-09 | 2016-06-09 | Robert Bosch Gmbh | Method for liquid jet cutting |
| US10252400B1 (en) | 2015-09-29 | 2019-04-09 | Flow International Corporation | Methods for improving jet cutting performance via force sensing |
| BE1025457B1 (en) * | 2017-08-08 | 2019-03-11 | D.E.C.O. Nv | Water jet device and method for detecting an incision |
| US11554461B1 (en) | 2018-02-13 | 2023-01-17 | Omax Corporation | Articulating apparatus of a waterjet system and related technology |
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| WO2021202390A1 (en) | 2020-03-30 | 2021-10-07 | Hypertherm, Inc. | Cylinder for a liquid jet pump with multi-functional interfacing longitudinal ends |
| CN114178992B (en) * | 2021-12-22 | 2022-12-06 | 安徽理工大学 | Protection device of telescopic cold cutting machine for coal mine and use method |
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| EP0084445A2 (en) * | 1982-01-15 | 1983-07-27 | Nordson Corporation | Method and apparatus for sensing clogged nozzle |
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| US3756106A (en) * | 1971-03-01 | 1973-09-04 | Bendix Corp | Nozzle for producing fluid cutting jet |
| US4272017A (en) * | 1976-03-22 | 1981-06-09 | Franz Norman C | Method and nozzle assembly for fluid jet penetration of a work material |
| US4228956A (en) * | 1978-11-30 | 1980-10-21 | Eaton Corporation | Irrigation system and fluid dispersion nozzle |
| JPS5898156A (en) * | 1981-12-07 | 1983-06-10 | Sugino Mach:Kk | Detection of clogging of nozzle |
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- 1984-04-25 AT AT0136784A patent/AT380422B/en not_active IP Right Cessation
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1985
- 1985-04-10 JP JP60074585A patent/JPS60228100A/en active Pending
- 1985-04-15 US US06/723,564 patent/US4594924A/en not_active Expired - Fee Related
- 1985-04-18 DE DE8585890097T patent/DE3578396D1/en not_active Expired - Fee Related
- 1985-04-18 EP EP85890097A patent/EP0159977B1/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3627065A (en) * | 1970-05-19 | 1971-12-14 | Donald R Murphy | Well-drilling method and apparatus involving determination of pressure of drilling fluid |
| US4084748A (en) * | 1977-01-04 | 1978-04-18 | Jack W. Anderson | Spray sensing system |
| US4298017A (en) * | 1980-02-04 | 1981-11-03 | Poly-Glas Systems | Automatic fluid component shut off system |
| US4420957A (en) * | 1981-10-26 | 1983-12-20 | Progressive Blasting Systems, Inc. | Monitor method and apparatus for particle blasting equipment |
| EP0084445A2 (en) * | 1982-01-15 | 1983-07-27 | Nordson Corporation | Method and apparatus for sensing clogged nozzle |
| WO1984002673A1 (en) * | 1983-01-13 | 1984-07-19 | Bilskade Service Hb | An arrangement for use with blasting equipment |
| EP0119057A2 (en) * | 1983-03-10 | 1984-09-19 | Nordson Corporation | Dispenser malfunction detector |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992020456A1 (en) * | 1991-05-17 | 1992-11-26 | Ingersoll-Rand Company | Integrity sensor for fluid jet nozzle |
| US5232155A (en) * | 1991-05-17 | 1993-08-03 | Ingersoll-Rand Company | Integrity sensor for fluid jet nozzle |
| FR2687090A1 (en) * | 1992-02-12 | 1993-08-13 | Cdpsi Sarl | Method and machine for cutting bread using medium-pressure water jets |
| FR2699852A1 (en) * | 1992-12-29 | 1994-07-01 | Gaz De France | Machining by controlled high-pressure fluid jet |
| EP3012075A1 (en) * | 2014-10-20 | 2016-04-27 | Andreas Perndorfer | Method for operating a facility for waterjet cutting and facility for water jet cutting |
| CN107243935A (en) * | 2017-07-31 | 2017-10-13 | 重庆良能机械有限公司 | A kind of palm fibre pad cutter device |
Also Published As
| Publication number | Publication date |
|---|---|
| ATA136784A (en) | 1985-10-15 |
| JPS60228100A (en) | 1985-11-13 |
| US4594924A (en) | 1986-06-17 |
| EP0159977A3 (en) | 1988-06-01 |
| AT380422B (en) | 1986-05-26 |
| DE3578396D1 (en) | 1990-08-02 |
| EP0159977B1 (en) | 1990-06-27 |
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