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WO2009059776A1 - Laser machining device comprising means for sprinkling and/or cooling an internal wall of a pipe, and method for machining a pipe by means of such a device - Google Patents

Laser machining device comprising means for sprinkling and/or cooling an internal wall of a pipe, and method for machining a pipe by means of such a device Download PDF

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Publication number
WO2009059776A1
WO2009059776A1 PCT/EP2008/009401 EP2008009401W WO2009059776A1 WO 2009059776 A1 WO2009059776 A1 WO 2009059776A1 EP 2008009401 W EP2008009401 W EP 2008009401W WO 2009059776 A1 WO2009059776 A1 WO 2009059776A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
nozzle
tube
cooling
wall
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.)
Ceased
Application number
PCT/EP2008/009401
Other languages
German (de)
French (fr)
Inventor
Arnd Szelagowski
Florian Sepp
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.)
Trumpf Werkzeugmaschinen SE and Co KG
Original Assignee
Trumpf Werkzeugmaschinen SE and Co KG
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 Trumpf Werkzeugmaschinen SE and Co KG filed Critical Trumpf Werkzeugmaschinen SE and Co KG
Priority to KR2020107000010U priority Critical patent/KR200467221Y1/en
Priority to DE202008017821U priority patent/DE202008017821U1/en
Priority to CN2008901001866U priority patent/CN201856036U/en
Publication of WO2009059776A1 publication Critical patent/WO2009059776A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/38—Removing material by boring or cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B23K26/146—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor the fluid stream containing a liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/16—Removal of by-products, e.g. particles or vapours produced during treatment of a workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/06—Tubes

Definitions

  • Laser processing machine with means for wetting and / or for cooling a tube inner wall and method for processing a tube by means of such a machine
  • the invention relates to a laser processing machine for processing a tube by means of a laser beam, with means for wetting and / or cooling the tube inner wall before or during the laser processing by means of a fluid, wherein the means for wetting and / or cooling the tube inner wall having a nozzle for fluid which is inserted into the tube in its longitudinal direction.
  • the invention further relates to a method for machining a tube by means of a laser beam, wherein the tube inner wall is wetted and / or cooled by means of a nozzle, which is introduced into the tube in the longitudinal direction, before or during the laser processing with a fluid.
  • EP 1 454 700 A1 proposes a rigid cooling and / or rinsing lance.
  • the lance is inserted into a workpiece to be machined and allows extraction and cooling.
  • a gas / air mixture is used to bind slag within the lance.
  • JP 62-183985 A and JP 11-090661 A Generic prior art is known from JP 62-183985 A and JP 11-090661 A.
  • JP 62-183985 A describes an apparatus and a method for plating steel pipes. Powder for plating is applied to the outer wall of the tube and melted by means of a laser beam. In the interior of the tube cooling water is sprayed by means of a nozzle attached to the end of a line in the direction of the processing point of the laser beam on the pipe inner wall.
  • JP 11-090661 A discloses an apparatus and a method for laser cutting of pipes.
  • a laser beam is directed from the outside to the tube wall.
  • a line for cooling air is pushed so far into the pipe interior that a nozzle is disposed at the end of the line in the insertion direction beyond the processing point of the laser beam. Cooling air exiting at the nozzle is directed counter to the insertion direction of the line and consequently passes through the processing point of the laser beam.
  • the nozzle for the fluid for wetting and / or cooling of the tube inner wall is arranged in the tube longitudinal direction in front of the processing point of the laser beam. From there, the nozzle directs a fluid cone, both at the level of the processing point of the laser beam and the processing point of the laser beam, diametrically opposite to the tube inner wall.
  • the wetting and / or cooling medium can be introduced in an optimally metered amount.
  • the wetting and / or cooling of the pipe in question is possible at different times. In the case of wetting or cooling during laser processing, direct cooling of the cut edge can take place.
  • the fluid may also be directed to the side opposite the processing location of the laser beam.
  • hose system for wetting and / or cooling of the pipe inner wall is provided, the flexible hose can be introduced by means of compressed air into the workpiece to be machined and positioned there (claim 2).
  • the 5-tube system allows wetting and / or cooling to be performed either during processing auxiliary times or during laser processing.
  • a double-walled hose (claim 5) makes it possible for both compressed air and fluid for wetting and / or cooling to flow in the pipe inner wall to the nozzle at the end of the hose.
  • the fluid does not necessarily have to be cooling water. Also conceivable are a water / oil mixture, water with detergent, etc.
  • the hose system comprises a roll-up unit for the hose (claim 6).
  • the reeling unit By means of the reeling unit, the hose can be stored and kept taut.
  • the means for wetting and / or for cooling the tube inner wall can be arranged arbitrarily on the laser processing machine.
  • Conceivable are an arrangement on a feed station for workpieces or on a loading device for workpieces (claims 7, 8).
  • FIG. 1 is a side view of an apparatus for wetting and / or cooling a pipe inner wall with a fluid
  • FIG. 5 shows a longitudinal section through the tube of FIG. 1 and
  • FIG. 3 shows a longitudinal section through the nozzle of the device according to FIG.
  • means in the form of a device 1 for wetting and / or cooling a pipe inner wall 2 are arranged on a feed station 3 of a laser processing machine provided for a pipe 4.
  • the tube 4 is held by a tensioning device 5.
  • the dimensions of the device 1 or the dimensions, in particular the maximum outside diameter of the hose system, are selected such that machining of small profile diameters (minimum inner diameter of 10 to 12 mm) is possible.
  • the device 1 comprises a reeling unit 6 with a drum for a hose 7, which is inserted into the pipe 4.
  • the reeling unit 6 ensures that the tube 7 does not come into direct contract with the laser beam emerging from a laser processing head.
  • a motor drive 10th To roll or retract the tube 7 from the tube 4 is a motor drive 10th
  • a fine water jet 11 cools the tube 4 and slag, which is obtained due to processing.
  • the backflow generated at the nozzle 9 keeps the nozzle 9 in position.
  • the nozzle 9 is held stationary shortly before the processing point of the laser beam and wets or cools from there the cutting front as well as the processing station. Ie of the laser beam diametrically opposite region of the tube inner wall. 2
  • the tube 7 is double-walled and flexible. Via a first channel 15 of the hose 7, a nozzle 9 is supplied with fluid for wetting and / or for cooling the pipe inner wall 2 at the hose end located in the interior of the pipe 4.
  • a second channel 14 of the tube 7 is traversed by compressed air, for example, of the laser processing machine anyway available compressed air. With the help of compressed air, the tube 7 can be inserted into the tube 4.
  • Fig. 3 also shows the nozzle 9, which forms the central unit of the device 1.
  • the nozzle 9 has an annular gap 12 for compressed air and a nozzle opening 13 for water.
  • the 14 and 15 for compressed air and water.
  • the supplied water is used for wetting and / or cooling the tube inner wall 2.
  • the compressed air moves the nozzle 9 by recoil into the tube 4 and emerges against the introduction direction of the nozzle 9 from.
  • the nozzle 9 can be changed if necessary.
  • the nozzle opening 13 produces a concentric and consequently conical water jet, which wets and / or cools both the cutting front and the opposite side of the pipe inner wall 2.
  • the located at the end of the hose nozzle 9 keeps the hose 7 by back pressure on voltage, regulates the flow of fluid and brings the fluid to the pipe inner wall 2.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)

Abstract

A laser machining device for machining a pipe (4) by means of a laser beam comprises means for sprinkling and/or cooling the internal wall of the pipe before and during the laser machining process. Said means encompass a nozzle (9) for fluid. The nozzle (9) is disposed in front of the machining point of the laser beam in the longitudinal direction of the pipe (4) and generates a cone-shaped fluid jet which hits the internal wall of the pipe both at the level of the machining point of the laser beam and on the side lying diametrically opposite the machining point of the laser beam. In a method for machining a pipe (4) by means of a laser beam, the nozzle (9) is introduced into the pipe (4) in the longitudinal direction thereof until the nozzle (9) is disposed in front of the machining point of the laser beam. The nozzle (9) then generates the aforementioned cone-shaped fluid jet.

Description

Laserbearbeitungsmaschine mit Mitteln zur Benetzung und/oder zur Kühlung einer Rohrinnenwand sowie Verfahren zum Bearbeiten eines Rohres mittels einer derartigen Maschine Laser processing machine with means for wetting and / or for cooling a tube inner wall and method for processing a tube by means of such a machine

Die Erfindung betrifft eine Laserbearbeitungsmaschine zum Bearbeiten eines Rohres mittels eines Laserstrahls, mit Mitteln zur Benetzung und/oder zur Kühlung der Rohrinnenwand vor oder während der Laserbearbeitung mittels eines Fluids, wobei die Mittel zur Benetzung und/oder zur Kühlung der Rohrinnenwand eine Düse für Fluid aufweisen, die in das Rohr in dessen Längsrichtung eingeführt ist. Die Erfindung betrifft des Weiteren ein Verfahren zum maschinellen Bearbeiten eines Rohres mittels eines Laserstrahls, wobei die Rohrinnenwand mittels einer Düse, die in das Rohr in dessen Längsrichtung eingeführt wird, vor oder während der Laserbearbei- tung mit einem Fluid benetzt und/oder gekühlt wird.The invention relates to a laser processing machine for processing a tube by means of a laser beam, with means for wetting and / or cooling the tube inner wall before or during the laser processing by means of a fluid, wherein the means for wetting and / or cooling the tube inner wall having a nozzle for fluid which is inserted into the tube in its longitudinal direction. The invention further relates to a method for machining a tube by means of a laser beam, wherein the tube inner wall is wetted and / or cooled by means of a nozzle, which is introduced into the tube in the longitudinal direction, before or during the laser processing with a fluid.

Beim Laserschneiden kommt es vor, dass Spritzer oder Schlacke im Inneren des bearbeiteten Werkstückes der Schnittkante gegenüberliegend an dem Werkstück anhaften. Dies macht eine kostenintensive Nachbearbei- tung des Werkstückes beispielsweise durch Sandstrahlen erforderlich. Derartige Probleme treten insbesondere an Werkstücken aus Edelstahl auf.In laser cutting, it happens that splashes or slag in the interior of the machined workpiece are adhered to the cutting edge opposite the workpiece. This makes a costly reworking tion of the workpiece, for example by sandblasting required. Such problems occur in particular on workpieces made of stainless steel.

Ebenso können Verfärbungen, die durch einen Laserenergieüberschuss beim Einstechen oder Schneiden an der einer Schnittkante gegenüberliegenden Seite des Werkstückes verursacht werden,zu einer kostenintensiven Nachbearbeitung beispielsweise durch Schleifen oder Polieren führen. An Rohren mit großer Wandstärke und filigranen Konturen kann es in Folge der starken Erwärmung im Material zu Ausbrennungen kommen. De- rartige Probleme treten insbesondere an Werkstücken aus Baustahl auf.Likewise, discolorations which are caused by an excess of laser energy during piercing or cutting on the side of the workpiece opposite a cutting edge can lead to expensive post-processing, for example by grinding or polishing. On pipes with a large wall thickness and filigree contours, burns can occur as a result of the strong heating in the material. Such problems occur, in particular, on structural steel workpieces.

EP 1 454 700 Al schlägt eine starre Kühl- und/oder Spüllanze vor. Die Lanze wird in ein zu bearbeitendes Werkstück eingeführt und ermöglicht eine Absaugung und Kühlung. Ein Gas-/ Luft-Gemisch wird zum Binden von Schlacke innerhalb der Lanze genutzt.EP 1 454 700 A1 proposes a rigid cooling and / or rinsing lance. The lance is inserted into a workpiece to be machined and allows extraction and cooling. A gas / air mixture is used to bind slag within the lance.

Gattungsgemäßer Stand der Technik ist bekannt aus JP 62-183985 A sowie aus JP 11-090661 A.Generic prior art is known from JP 62-183985 A and JP 11-090661 A.

JP 62-183985 A beschreibt eine Vorrichtung sowie ein Verfahren zum Plattieren von Stahlrohren. Pulver für die Plattierung wird auf die Außenwand des Rohres aufgebracht und mittels eines Laserstrahls geschmolzen. Im Rohrinnern wird Kühlwasser mittels einer am Ende einer Leitung angebrachten Düse in Richtung auf die Bearbeitungsstelle des Laserstrahls auf die Rohrinnenwand aufgesprüht.JP 62-183985 A describes an apparatus and a method for plating steel pipes. Powder for plating is applied to the outer wall of the tube and melted by means of a laser beam. In the interior of the tube cooling water is sprayed by means of a nozzle attached to the end of a line in the direction of the processing point of the laser beam on the pipe inner wall.

JP 11-090661 A offenbart eine Vorrichtung und ein Verfahren zum Laserschneiden von Rohren. Zur Rohrbearbeitung wird ein Laserstrahl von außen auf die Rohrwand gerichtet. Während des Schneidprozesses ist eine Leitung für kühlende Luft so weit in das Rohrinnere eingeschoben, dass eine Düse an dem in Einschubrichtung gelegenen Ende der Leitung jenseits der Bearbeitungsstelle des Laserstrahls angeordnet ist. An der Düse austretende kühlende Luft wird entgegen der Einschubrichtung der Leitung gelenkt und passiert infolgedessen die Bearbeitungsstelle des Laserstrahls.JP 11-090661 A discloses an apparatus and a method for laser cutting of pipes. For tube processing, a laser beam is directed from the outside to the tube wall. During the cutting process, a line for cooling air is pushed so far into the pipe interior that a nozzle is disposed at the end of the line in the insertion direction beyond the processing point of the laser beam. Cooling air exiting at the nozzle is directed counter to the insertion direction of the line and consequently passes through the processing point of the laser beam.

Bearbeitungsbedingte Anhaftungen im Rohrinneren noch wirksamer zu verhindern, ist Aufgabe der vorliegenden Erfindung.To prevent machining-related adhesions in the tube interior even more effective, is the object of the present invention.

Diese Aufgabe wird durch die Laserbearbeitungsmaschine nach Anspruch 1 sowie durch das Verfahren nach Anspruch 9 gelöst. Im Falle der Erfindung wird die Düse für das Fluid zur Benetzung und/oder zur Kühlung der Rohrinnenwand in Rohrlängsrichtung vor der Bearbeitungsstelle des Laserstrahls angeordnet. Von dort aus richtet die Düse einen Fluidkegel sowohl auf Höhe der Bearbeitungsstelle des Laserstrahls als auch der Bear- beitungsstelle des Laserstrahls diametral gegenüberliegend auf die Rohrinnenwand. Das Benetzungs- und/oder Kühlmedium kann in optimal dosierter Menge eingebracht werden. Die Benetzung und/oder Kühlung des betreffenden Rohres ist zu unterschiedlichen Zeitpunkten möglich. Bei einer Benetzung beziehungsweise Kühlung während der Laserbearbeitung kann eine direkte Kühlung der Schnittkante erfolgen. Das Fluid kann außerdem zu der Seite geführt werden, welche der Bearbeitungsstelle des Laserstrahls gegenüberliegt. Das Anhaften von Materialspritzem insbesondere bei Werkstücken aus Edelstahl (VA) wird verhindert. Bei der Baustahlbearbeitung tritt ein geringerer Wärmeverzug auf und/oder die Schnittqualität wird verbessert. Bei einer gleichzeitig mit der Laserbearbeitung erfolgenden Benetzung und/oder Kühlung werden Prozessrauche gebunden. Infolgedessen ist es denkbar, dass auf Einheiten zum Absaugen von Prozessrauchen verzichtet werden kann. Im Falle einer bevorzugten Erfindungsbauart ist ein Schlauchsystem zur Benetzung und/oder zur Kühlung der Rohrinnenwand vorgesehen, dessen flexibler Schlauch mit Hilfe von Druckluft in das zu bearbeitende Werkstück eingeführt und dort positioniert werden kann (Anspruch 2). Das 5 Schlauchsystem ermöglicht es, die Benetzung und/oder Kühlung entweder während Bearbeitungsnebenzeiten oder während der Laserbearbeitung durchzuführen.This object is achieved by the laser processing machine according to claim 1 and by the method according to claim 9. In the case of the invention, the nozzle for the fluid for wetting and / or cooling of the tube inner wall is arranged in the tube longitudinal direction in front of the processing point of the laser beam. From there, the nozzle directs a fluid cone, both at the level of the processing point of the laser beam and the processing point of the laser beam, diametrically opposite to the tube inner wall. The wetting and / or cooling medium can be introduced in an optimally metered amount. The wetting and / or cooling of the pipe in question is possible at different times. In the case of wetting or cooling during laser processing, direct cooling of the cut edge can take place. The fluid may also be directed to the side opposite the processing location of the laser beam. The adhesion of material splashes, in particular for workpieces made of stainless steel (VA) is prevented. In structural steel processing, less heat distortion occurs and / or the cut quality is improved. In the event of wetting and / or cooling occurring simultaneously with laser processing, process fumes are bound. As a result, it is conceivable that units for extracting process smoking can be dispensed with. In the case of a preferred embodiment of the invention, a hose system for wetting and / or cooling of the pipe inner wall is provided, the flexible hose can be introduced by means of compressed air into the workpiece to be machined and positioned there (claim 2). The 5-tube system allows wetting and / or cooling to be performed either during processing auxiliary times or during laser processing.

In weiterer bevorzugter Ausgestaltung der Erfindung dient zum Einführen lo und Positionieren des Schlauches eine an einem Schlauchende vorgesehene Düse mit Mitteln zum Rückstau der Druckluft (Anspruch 3).In a further preferred embodiment of the invention is used to introduce lo and positioning of the hose provided at a hose end nozzle with means for backflow of compressed air (claim 3).

Ein doppelwandig ausgebildeter Schlauch (Anspruch 5) ermöglicht es, dass sowohl Druckluft als auch Fluid zur Benetzung und/oder zur Kühlung i5 der Rohrinnenwand zu der Düse am Schlauchende strömen können. Bei dem Fluid muss es sich nicht zwingend um Kühlwasser handeln. Denkbar sind auch ein Wasser-/Ol-Gemisch, Wasser mit Spülmittel etc.A double-walled hose (claim 5) makes it possible for both compressed air and fluid for wetting and / or cooling to flow in the pipe inner wall to the nozzle at the end of the hose. The fluid does not necessarily have to be cooling water. Also conceivable are a water / oil mixture, water with detergent, etc.

Im Falle einer weiteren bevorzugten Ausführungsform der Erfindung um- 20 fasst das Schlauchsystem eine Aufrolleinheit für den Schlauch (Anspruch 6). Mittels der Aufrolleinheit kann der Schlauch bevorratet und straff gehalten werden.In the case of a further preferred embodiment of the invention, the hose system comprises a roll-up unit for the hose (claim 6). By means of the reeling unit, the hose can be stored and kept taut.

Die Mittel zur Benetzung und/oder zur Kühlung der Rohrinnenwand kön- 25 nen an der Laserbearbeitungsmaschine beliebig angeordnet sein. Denkbar sind eine Anordnung auf einer Vorschubstation für Werkstücke oder auf einer Beladevorrichtung für Werkstücke (Ansprüche 7, 8).The means for wetting and / or for cooling the tube inner wall can be arranged arbitrarily on the laser processing machine. Conceivable are an arrangement on a feed station for workpieces or on a loading device for workpieces (claims 7, 8).

Ein bevorzugtes Ausführungsbeispiel der Erfindung ist in den Figuren dar- 3o gestellt und wird nachfolgend anhand der Figuren beschrieben. Es zeigen: Fig. 1 eine Seitenansicht einer Vorrichtung zur Benetzung und/oder zur Kühlung einer Rohrinnenwand mit einem Fluid,A preferred embodiment of the invention is provided in the figures and is described below with reference to the figures. Show it: 1 is a side view of an apparatus for wetting and / or cooling a pipe inner wall with a fluid,

5 Fig.2 einen Längsschnitt durch das Rohr gemäß Fig. 1 und5 shows a longitudinal section through the tube of FIG. 1 and

Fig.3 einen Längsschnitt durch die Düse der Vorrichtung gemäß Fig.3 shows a longitudinal section through the nozzle of the device according to FIG.

1.1.

lo Gemäß Fig. 1 sind Mittel in Form einer Vorrichtung 1 zur Benetzung und/oder zur Kühlung einer Rohrinnenwand 2 auf einer für ein Rohr 4 vorgesehenen Vorschubstation 3 einer Laserbearbeitungsmaschine angeordnet. Das Rohr 4 wird von einer Spannvorrichtung 5 gehalten. Die Abmessungen der Vorrichtung 1 beziehungsweise die Abmessungen, insbesonde- i5 re der maximale Außendurchmesser des Schlauchsystems sind derart gewählt, dass eine Bearbeitung von kleinen Profildurchmessern (minimaler Innendurchmesser von 10 bis 12 mm) möglich ist.According to FIG. 1, means in the form of a device 1 for wetting and / or cooling a pipe inner wall 2 are arranged on a feed station 3 of a laser processing machine provided for a pipe 4. The tube 4 is held by a tensioning device 5. The dimensions of the device 1 or the dimensions, in particular the maximum outside diameter of the hose system, are selected such that machining of small profile diameters (minimum inner diameter of 10 to 12 mm) is possible.

Die Vorrichtung 1 umfasst eine Aufrolleinheit 6 mit einer Trommel für ei- 20 nen Schlauch 7, der in das Rohr 4 eingeführt ist. Die Aufrolleinheit 6 sorgt dafür, dass der Schlauch 7 nicht in direkten Kontrakt mit dem aus einem Laserbearbeitungskopf austretenden Laserstrahl kommt. Zum Aufrollen beziehungsweise Herausfahren des Schlauchs 7 aus dem Rohr 4 dient ein motorischer Antrieb 10.The device 1 comprises a reeling unit 6 with a drum for a hose 7, which is inserted into the pipe 4. The reeling unit 6 ensures that the tube 7 does not come into direct contract with the laser beam emerging from a laser processing head. To roll or retract the tube 7 from the tube 4 is a motor drive 10th

2525

Wie in Fig. 2 dargestellt, kühlt ein feiner Wasserstrahl 11 das Rohr 4 sowie Schlacke, die bearbeitungsbedingt anfällt. Der an der Düse 9 erzeugte Rückstau hält die Düse 9 auf Position. Die Düse 9 wird kurz vor der Bearbeitungsstelle des Laserstrahls stationär gehalten und benetzt beziehungs- 30 weise kühlt von dort aus die Schneidfront sowie den der Bearbeitungsstel- Ie des Laserstrahls diametral gegenüberliegenden Bereich der Rohrinnenwand 2.As shown in Fig. 2, a fine water jet 11 cools the tube 4 and slag, which is obtained due to processing. The backflow generated at the nozzle 9 keeps the nozzle 9 in position. The nozzle 9 is held stationary shortly before the processing point of the laser beam and wets or cools from there the cutting front as well as the processing station. Ie of the laser beam diametrically opposite region of the tube inner wall. 2

Gemäß Fig. 3 ist der Schlauch 7 doppelwandig ausgebildet und flexibel. Über einen ersten Kanal 15 des Schlauchs 7 wird einer Düse 9 an dem im Inneren des Rohres 4 liegenden Schlauchende Fluid zur Benetzung und/oder zur Kühlung der Rohrinnenwand 2 zugeführt. Ein zweiter Kanal 14 des Schlauchs 7 wird von Druckluft, beispielsweise von an der Laserbearbeitungsmaschine ohnehin verfügbarer Druckluft, durchströmt. Mit Hilfe der Druckluft kann der Schlauch 7 in das Rohr 4 eingeschoben werden.According to Fig. 3, the tube 7 is double-walled and flexible. Via a first channel 15 of the hose 7, a nozzle 9 is supplied with fluid for wetting and / or for cooling the pipe inner wall 2 at the hose end located in the interior of the pipe 4. A second channel 14 of the tube 7 is traversed by compressed air, for example, of the laser processing machine anyway available compressed air. With the help of compressed air, the tube 7 can be inserted into the tube 4.

Fig. 3 zeigt außerdem die Düse 9, welche die zentrale Einheit der Vorrichtung 1 bildet. Die Düse 9 weist einen Ringspalt 12 für Druckluft und eine Düsenöffnung 13 für Wasser auf. Der Ringspalt 12 und die DüsenöffnungFig. 3 also shows the nozzle 9, which forms the central unit of the device 1. The nozzle 9 has an annular gap 12 for compressed air and a nozzle opening 13 for water. The annular gap 12 and the nozzle opening

13 schließen sich an die im Innern des Schlauchs 7 verlaufenden Kanäle13 close to the running inside the tube 7 channels

14 und 15 für Druckluft und Wasser an. Das zugeführte Wasser dient der Benetzung und/oder Kühlung der Rohrinnenwand 2. Die Druckluft bewegt die Düse 9 über Rückstoß in das Rohr 4 und tritt entgegen der Einfüh- rungsrichtung der Düse 9 aus. Die Düse 9 kann bei Bedarf gewechselt werden. Die Düsenöffnung 13 erzeugt einen konzentrischen und folglich kegelförmigen Wasserstrahl, welcher sowohl die Schneidfront als auch die gegenüberliegende Seite der Rohrinnenwand 2 benetzt und/oder kühlt. Die sich am Schlauchende befindende Düse 9 hält den Schlauch 7 durch Rückstau auf Spannung, reguliert den Fluidstrom und bringt das Fluid auf die Rohrinnenwand 2 auf. 14 and 15 for compressed air and water. The supplied water is used for wetting and / or cooling the tube inner wall 2. The compressed air moves the nozzle 9 by recoil into the tube 4 and emerges against the introduction direction of the nozzle 9 from. The nozzle 9 can be changed if necessary. The nozzle opening 13 produces a concentric and consequently conical water jet, which wets and / or cools both the cutting front and the opposite side of the pipe inner wall 2. The located at the end of the hose nozzle 9 keeps the hose 7 by back pressure on voltage, regulates the flow of fluid and brings the fluid to the pipe inner wall 2.

Claims

Patentansprüche claims 1. Laserbearbeitungsmaschine zum Bearbeiten eines Rohres (4) mittels eines Laserstrahls, mit Mitteln zur Benetzung und/oder zur Kühlung1. Laser processing machine for processing a pipe (4) by means of a laser beam, with means for wetting and / or for cooling 5 der Rohrinnenwand (2) vor oder während der Laserbearbeitung mittels eines Fluids, wobei die Mittel zur Benetzung und/oder zur Kühlung der Rohrinnenwand (2) eine Düse (9) für Fluid aufweisen, die in das Rohr (4) in dessen Längsrichtung eingeführt ist, dadurch gekennzeichnet, dass die Düse (9) in Längsrichtung des Rohres (4)o vor der Bearbeitungsstelle des Laserstrahls angeordnet ist und einen5 of the tube inner wall (2) before or during the laser machining by means of a fluid, wherein the means for wetting and / or cooling the tube inner wall (2) having a nozzle (9) for fluid, which introduced into the tube (4) in its longitudinal direction is, characterized in that the nozzle (9) is arranged in the longitudinal direction of the tube (4) o in front of the processing point of the laser beam and a Fluidkegel erzeugt, welcher auf die Rohrinnenwand (2) sowohl auf Höhe der Bearbeitungsstelle des Laserstrahls als auch an der Seite auftrifft, welche der Bearbeitungsstelle des Laserstrahls diametral gegenüberliegt. 5Produces fluid cone which impinges on the tube inner wall (2) both at the level of the processing point of the laser beam and on the side which is diametrically opposite the processing point of the laser beam. 5 2. Laserbearbeitungsmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Mittel zur Benetzung und/oder zur Kühlung der Rohrin- nenwand (2) durch ein Schlauchsystem zur Benetzung und/oder zur Kühlung der Rohrinnenwand (2) ausgebildet sind, welches einen fle-o xiblen Schlauch (7) umfasst, der seinerseits mit Hilfe von Druckluft in das zu bearbeitende Rohr (4) eingeführt und dort positioniert werden kann.2. Laser processing machine according to claim 1, characterized in that the means for wetting and / or cooling the Rohrin- nenwand (2) by a tube system for wetting and / or cooling of the tube inner wall (2) are formed, which a fle-o xible hose (7), which in turn can be introduced by means of compressed air in the pipe to be machined (4) and positioned there. 3. Laserbearbeitungsmaschine nach Anspruch 2, dadurch gekennzeich-5 net, dass die Düse (9) an einem Ende des Schlauchs (7) vorgesehen ist und Mittel zum Rückstau der Druckluft aufweist.3. Laser processing machine according to claim 2, characterized marked 5 net, that the nozzle (9) at one end of the hose (7) is provided and has means for backflow of the compressed air. 4. Laserbearbeitungsmaschine nach Anspruch 3, dadurch gekennzeichnet, dass die Düse (9) einen Ringspalt (12) für Druckluft aufweist.0 4. Laser processing machine according to claim 3, characterized in that the nozzle (9) has an annular gap (12) for compressed air 5. Laserbearbeitungsmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Schlauch (7) doppel- wandig ausgebildet ist und einen ersten Kanal (14) für Druckluft sowie einen zweiten Kanal (15) für das Fluid zur Benetzung und/oder zur Kühlung der Rohrinnenwand (2) aufweist.5. Laser processing machine according to one of the preceding claims, characterized in that the hose (7) is double-walled and a first channel (14) for compressed air and a second channel (15) for the fluid for wetting and / or for cooling the Pipe inner wall (2). 6. Laserbearbeitungsmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Schlauchsystem eine Aufrolleinheit (6) für den Schlauch (7) umfasst. 06. Laser processing machine according to one of the preceding claims, characterized in that the hose system comprises a roll-up unit (6) for the hose (7). 0 7. Laserbearbeitungsmaschine nach einem der vorhergehenden Ansprüche, mit einer Vorschubstation (3) für Rohre (4), dadurch gekennzeichnet, dass die Mittel zur Benetzung und/oder zur Kühlung der Rohrinnenwand (2) im Bereich der Vorschubstation (3) an-s geordnet sind.7. Laser processing machine according to one of the preceding claims, with a feed station (3) for pipes (4), characterized in that the means for wetting and / or cooling of the pipe inner wall (2) arranged in the region of the feed station (3) an-s are. 8. Laserbearbeitungsmaschine nach einem der vorhergehenden Ansprüche, mit einer Beladestation für Rohre (4), dadurch gekennzeichnet, dass die Mittel zur Benetzung und/oder zur Kühlung der0 Rohrinnenwand (2) im Bereich der Beladestation angeordnet sind.8. Laser processing machine according to one of the preceding claims, with a loading station for pipes (4), characterized in that the means for wetting and / or cooling der0 pipe inner wall (2) are arranged in the region of the loading station. 9. Verfahren zum maschinellen Bearbeiten eines Rohres (4) mittels eines Laserstrahls, wobei die Rohrinnenwand (2) mittels einer Düse (9), die in das Rohr (4) in dessen Längsrichtung eingeführt wird, vor5 oder während der Laserbearbeitung mit einem Fluid benetzt und/oder gekühlt wird, dadurch gekennzeichnet, dass die Düse (9) in Längsrichtung des Rohres (4) in dieses eingeführt wird, bis sie vor der Bearbeitungsstelle des Laserstrahls angeordnet ist und dass mittels der Düse (9) ein Fluidkegel erzeugt wird, welcher auf dieo Rohrinnenwand (2) sowohl auf Höhe der Bearbeitungsstelle des La- serstrahls als auch an der Seite auftrifft, welche der Bearbeitungsstelle des Laserstrahls diametral gegenüberliegt. 9. A method of machining a pipe (4) by means of a laser beam, wherein the pipe inner wall (2) by means of a nozzle (9) which is inserted into the tube (4) in the longitudinal direction, before5 or during the laser machining wetted with a fluid and / or cooled, characterized in that the nozzle (9) in the longitudinal direction of the tube (4) is inserted into this until it is arranged in front of the processing point of the laser beam and that by means of the nozzle (9), a fluid cone is generated, which on the inner tube wall (2) both at the level of the processing point of the serstrahls and impinges on the side which is diametrically opposite the processing point of the laser beam.
PCT/EP2008/009401 2007-11-07 2008-11-07 Laser machining device comprising means for sprinkling and/or cooling an internal wall of a pipe, and method for machining a pipe by means of such a device Ceased WO2009059776A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR2020107000010U KR200467221Y1 (en) 2007-11-07 2008-11-07 Laser processing machine having means for sprinkling or for cooling the inside wall of a pipe
DE202008017821U DE202008017821U1 (en) 2007-11-07 2008-11-07 Laser processing machine with means for wetting and / or for cooling a tube inner wall
CN2008901001866U CN201856036U (en) 2007-11-07 2008-11-07 Laser processing equipment with mechanism for spraying and/or cooling inner wall of pipe fitting

Applications Claiming Priority (2)

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DE102007052945A DE102007052945B3 (en) 2007-11-07 2007-11-07 Laser processing machine
DE102007052945.9 2007-11-07

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KR (1) KR200467221Y1 (en)
CN (1) CN201856036U (en)
DE (2) DE102007052945B3 (en)
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US10589371B2 (en) 2013-05-23 2020-03-17 Crc-Evans Pipeline International, Inc. Rotating welding system and methods
US10695876B2 (en) 2013-05-23 2020-06-30 Crc-Evans Pipeline International, Inc. Self-powered welding systems and methods
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KR200467221Y1 (en) 2013-06-05
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CN201856036U (en) 2011-06-08
DE202008017821U1 (en) 2010-09-02

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