DE19729825C1

DE19729825C1 - Cutting pipes and other cylindrical components into lengths

Info

Publication number: DE19729825C1
Application number: DE1997129825
Authority: DE
Inventors: Andreas Dr Rer Nat Lenk; Lothar Dr Ing Morgenthal; Dieter Dr Ing Polack
Original assignee: Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Current assignee: Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Priority date: 1997-07-11
Filing date: 1997-07-11
Publication date: 1998-11-12
Anticipated expiration: 2017-07-12

Abstract

The apparatus for continuous cutting pipes (6) and other cylindrical components with any cross-sectional shape into lengths includes means for producing two laser beams. For focussing, each of the beams is provided with a mirror (3) located respectively at distances (a+c) and (b+d) from the pipe axis. Each mirror is mounted on a rotatory unit (7, 8) whose axis of rotation is parallel to the pipe axis and is located at a distance (a, b) from the latter. The two laser beams hit a reflective element (11) in opposition to one another. Rotation of the mirrors (3) is arranged so that at the start of cutting the beams are positioned at one edge of the reflective element and during subsequent cutting corresponding to mirror rotations through 180 deg are brought to the other edge of this element. The feed rate of the pipe (6) is synchronised with the rate of advance of the beams from one edge to another of the reflective element (11).

Description

Die Erfindung betrifft eine Vorrichtung und ein Verfahren für das Ablängen (Schneiden) von Roh ren und anderen zylindrischen Bauteilen beliebiger, insbesondere runder Querschnittsform.The invention relates to a device and a method for cutting (cutting) raw ren and other cylindrical components of any, in particular round cross-sectional shape.

Ein besonderes Anwendungsgebiet der Erfindung ist das Schneiden von Rohren aber auch Zylin dern mit unterschiedlichen Querschnittsformen (von rund bis vieleckig) aus unterschiedlichen Ma terialien, insbesondere Pappe, Kunststoffe (Plastik), Eisen, Stahl und anderen Metallen oder Metal legierungen.A special field of application of the invention is the cutting of pipes but also Zylin with different cross-sectional shapes (from round to polygonal) of different dimensions materials, in particular cardboard, plastics (plastic), iron, steel and other metals or metal alloys.

Es sind unterschiedliche Verfahren und Vorrichtungen für das Ablängen von Rohren bekannt. Bei derartigen Verfahren ist stets zu berücksichtigen, daß sich die abzulängenden (= auf ein gewünsch tes Maß schneiden) Rohre entlang ihrer Längsachse bewegen, aber sich dabei nicht um ihre eigene Achse drehen.Different methods and devices for cutting pipes to length are known. At Such procedures must always be taken into account that the (to be cut to a desired cut to size) move pipes along their longitudinal axis, but not about their own Turn axis.

Aus diesem Grund werden derzeit im allgemeinen mitfahrende Schneideeinrichtungen ("Fliegende Scheren") verwendet, die einen komplexen Bewegungsablauf vollführen, wobei einzelne Achsbe wegungen diskontinuierlich und auch zeitweise direkt entgegengesetzt zum Rohrvorschub verlau fen. Deshalb wird das Durchtrennen des bewegten Schneidgutes teilweise durch hauptzeitparalle Bearbeitung mit mehreren Schneidköpfen realisiert. So kann z. B. nachdem ein Schneidkopf das Durchschneiden des Rohres beendet hat und zur Kompensation der Werkstückbewegung (Rohrbewegung) in seine Ausgangsstellung zurückgeführt werden muß, schon ein zweiter Schneidkopf mit dem Trennprozeß am nächsten Rohrstück beginnen.For this reason, cutting devices that travel with the vehicle ("flying Scissors ") are used, which perform a complex sequence of movements, with individual axes Movements discontinuous and sometimes temporarily opposite to the pipe feed fen. For this reason, the cutting of the material to be cut is partially parallel to the main time Machining with multiple cutting heads realized. So z. B. after a cutting head Cutting through the pipe has ended and to compensate for the workpiece movement (Pipe movement) must be returned to its starting position, already a second one Start the cutting head with the cutting process on the next pipe section.

Aus US 40 00 391 ist außerdem eine Vorrichtung zum Ablängen von Rohren bekannt, bei der zwei Laserschneidstrahlen von zwei um 180° versetzt angeordneten Strahlführungs- und -formungseinrichtungen auf die zu schneidende Oberfläche gerichtet werden.From US 40 00 391 a device for cutting pipes to length is also known in the two laser cutting beams from two beam guiding and -forming devices are aimed at the surface to be cut.

Nachteilig dabei sind insbesondere die diskontinuierlichen Vorschubbewegungen und die direkte Umkehrung der Bewegungsrichtung der Schneidköpfe (Beschleunigen, Abbremsen, notwendige Positioniergenauigkeit, Bearbeitungskopfmassen, Mitführung der Medienversorgungen) sowie das für schnell bewegte Rohre meist mehrere Bearbeitungsköpfe für das Ablängen notwendig sind und das diese Verfahren nur für Rohre einigermaßen sinnvoll einsetzbar sind. Disadvantages are the discontinuous feed movements and the direct ones Reversal of the direction of movement of the cutting heads (accelerating, braking, necessary Positioning accuracy, machining head masses, carrying the media supplies) and that For fast moving pipes, several processing heads are usually required for cutting to length and that these methods can only be used reasonably for pipes.

In DE 32 06 210 A1 ist eine Vorrichtung beschrieben, die noch zumindest ein reflektierendes opti sches Element aufweist, welches den Fokus des Laserschneidstrahls radial auf die Rohroberfläche lenkt und bei der der Laserspot auf der Rohroberfläche eine Bahn in einer Ebene senkrecht zur Rohrachse beschreibt. Diese bekannte Vorrichtung hat jedoch den Nachteil, daß sie sich nur in besonderen Einzelfällen einsetzen läßt.DE 32 06 210 A1 describes a device which also has at least one reflective opti cal element, which focuses the laser cutting beam radially on the pipe surface steers and in which the laser spot on the pipe surface travels in a plane perpendicular to Describes the pipe axis. However, this known device has the disadvantage that it is only in can be used in special individual cases.

Es ist somit Aufgabe der Erfindung eine Vorrichtung und ein Verfahren zum Ablängen (Schneiden) von Rohren und anderen zylindrischen Bauteilen vorzuschlagen, bei denen die Nachteile der Stan des der Technik nicht auftreten.The object of the invention is therefore a device and a method for cutting to length (cutting) to propose pipes and other cylindrical components in which the disadvantages of Stan of technology does not occur.

Demgemäß ist es Aufgabe der Erfindung eine Vorrichtung und eine Verfahren der genannten Art vorzuschlagen, die nicht nur für Rohre sinnvoll einsetzbar sind, die einen vollständig harmonischen und kontinuierlichen Prozeß gestatten und bei denen auch für schnell bewegte Rohre nur ein Be arbeitungskopf notwendig ist.Accordingly, it is an object of the invention an apparatus and a method of the type mentioned propose that can be used not only for pipes that are completely harmonious and allow continuous process and in which even for fast moving pipes only one loading working head is necessary.

Erfindungsgemäß werden diese Aufgaben mit einer Vorrichtung gemäß An spruch 1 und mit einem Verfahren gemäß Anspruch 19 gelöst.According to the invention, these tasks are performed with a device according to An award 1 and with a method according to claim 19 solved.

Die Patentansprüche 2 bis 18 stellen dabei vorrichtungsseitige und die Patentansprüche 20 bis 31 verfahrensseitige vorteilhafte Ausgestaltungen dar.Claims 2 to 18 represent device-side and claims 20 to 31 Process-related advantageous embodiments.

Das erfindungsgemäß Verfahren bzw. die erfindungsgemäße Vorrichtung zeichnen sich durch ausschließlich kontinuierliche (geschwindigkeitskonstante), kreis- oder bogenförmige Bewegungen der Schneidvorrichtung um eine feste Achse und einen mitgeführten und geformten Laserstrahl aus. Mit der erfindungsgemäßen Vorrichtung bzw. dem erfindungsgemäßen Verfahren ist eine Umkehrung der Bewegungsrichtungen in den Achsen nach dem Ablängprozeß zur Rückführung des Schnittwerkzeuges in die Startposition weder für die Schneidvorrichtung noch für Teile dieser erforderlich. Zur Realisierung des erfindungsgemäßen Trennverfahrens werden mit der erfindungs gemäßen Vorrichtung keine Linearbewegungen, sonder nur drehende Bewegungen benötigt, wodurch maximale Geschwindigkeiten und Frequenzen realisierbar werden. Zum Ablängen wird nur ein Bearbeitungskopf benötigt, die gewünschten Rohrabschnitte können auch bei großen Werkstückvorschubgeschwindigkeiten realisiert und die Rohrlängen gewünscht voreingestellt wer den. Bearbeitet werden können die unterschiedlichsten Rohr-Querschnittsformen (rund bis meh reckig) und Rohr-Durchmesser.The method according to the invention and the device according to the invention are distinguished by only continuous (speed constant), circular or arc-shaped movements the cutting device about a fixed axis and an entrained and shaped laser beam out. With the device according to the invention or the method according to the invention, Reversal of the directions of movement in the axes after the cutting process for return the cutting tool in the starting position neither for the cutting device nor for parts of it required. To implement the separation method according to the invention no linear movements according to the device, but only requires rotating movements, making maximum speeds and frequencies possible. For cutting to length only one machining head is required, the desired pipe sections can also be used for large ones Workpiece feed speeds can be realized and the tube lengths can be preset the. A wide variety of tube cross-sectional shapes (round to meh angular) and tube diameter.

Das nachfolgend auch in den Fig. 1 bis 4 dargestellte Prinzip kann durch Hinzufügen von weiteren bekannten optischen Komponenten, wie Linsen oder/und Spiegeln (Teleskope) oder/und in Ver bindung mit zusätzlichen Achsen erweitert werden, um z. B. die Schnittqualität zu beeinflussen.The principle also shown below in FIGS. 1 to 4 can be expanded by adding further known optical components, such as lenses or / and mirrors (telescopes) and / or in conjunction with additional axes, in order, for. B. to influence the cut quality.

Das Prinzip der erfindungsgemäßen Lösung soll anhand des nachfolgenden Ausführungsbeispieles erläutert werden. Die Darstellungen gemäß den Fig. 1 bis 4 sollen dies skizzenhaft unterstützen.The principle of the solution according to the invention will be explained using the following exemplary embodiment. The representations according to FIGS. 1 to 4 are intended to support this sketchily.

Embodiment

Das abzulängende Rohr (6) in den Fig. 1 bis 4, wird kontinuierlich vorwärts bewegt und zum Schneiden wirken gleichzeitig zwei zueinander um ca. 180° versetzte Laserspots möglichst senk recht zur Rohroberfläche ein. Fokussiert werden die Laserspots z. B. durch Asphärenspiegel (3), die jeweils auf einer Drehbewegungsvorrichtung (7; 8) befestigt sind und deren Achsen parallel zur Rohrachse um den Betrag (a) bzw. (b) wobei a = b sein kann versetzt angeordnet sind.The pipe ( 6 ) to be cut to length in FIGS . 1 to 4 is continuously moved forward and for cutting, two laser spots offset from one another by approximately 180 ° act as perpendicular as possible to the pipe surface. The laser spots are focused e.g. B. by aspherical mirrors ( 3 ), which are each attached to a rotary movement device ( 7 ; 8 ) and whose axes are offset parallel to the tube axis by the amount (a) or (b) where a = b can be.

Bei Rotation der Drehbewegungsvorrichtungen beschreiben die vorfokussierten Laserstrahlen je weils eine Kreisbahn (Fig. 1 bis 3) mit den Mittelpunkten (9 und 10), die zur Rohrachse jeweils um den Betrag (a) versetzt angeordnet sind. In Fig. 1 sind weiterhin zwei Planspiegel (11) dargestellt, die symmetrisch zur Rohrachse um 180° zueinander versetzt angeordnet sind, auf einer Kreisbahn rotieren und deren Rotation synchron zu den Drehbewegungsvorrichtungen (7 und 8) mit den asphärischen Forkussierspiegeln erfolgt. Auf den Spiegeloberflächen der Planspiegel (11), die sich auf einer Kreisbahn bewegen, treffen die vorfokussierten Laserstrahlen auf, werden um 90° umge lenkt und zur Einwirkung (Schneiden) auf die Rohroberfläche reflektiert. Durch den Versatz (a) durchlaufen die rotierenden vorfokkusierten Laserstrahlen auf den Planspiegelflächen unterschied liche Höhenlinien und beschreiben durch die 90°-Reflexion auf der Rohroberfläche eine spiralför mige Bahn um die Rohrachse (Umformung der Drehbewegungen in Linearbewegungen zur Rohrachse).When the rotary movement devices rotate, the prefocused laser beams each describe a circular path (FIGS . 1 to 3) with the center points ( 9 and 10 ), which are offset from the tube axis by the amount (a). In Fig. 1 two plane mirrors ( 11 ) are also shown, which are arranged symmetrically to the pipe axis by 180 ° to each other, rotate on a circular path and their rotation takes place synchronously with the rotary movement devices ( 7 and 8 ) with the aspherical focusing mirrors. On the mirror surfaces of the plane mirror ( 11 ), which move on a circular path, the pre-focused laser beams hit, are deflected by 90 ° and reflected to act (cutting) on the pipe surface. Due to the offset (a), the rotating prefocused laser beams on the plane mirror surfaces pass through different contour lines and, due to the 90 ° reflection on the pipe surface, describe a spiral path around the pipe axis (reshaping of the rotary movements in linear movements to the pipe axis).

Anstelle der zwei rotierenden Planspiegel (11) kann aber auch ein Kegelspiegel (1) (vergl. Fig. 2), der symmetrisch zur Rohrachse angebracht ist, eingesetzt werden. Vorteilhaft dabei ist, daß der Kegelspiegel (1) fest stehen kann und dadurch keine zu den Drehvorrichtungen mit den asphäri schen Spiegeln synchronisierte Rotation ausführen muß. Nachteilig dabei ist, daß zusätzliche Ab bildungsfehler durch die kreisförmige Kegelfläche entstehen können, die sich insbesondere bei kleineren Rohrdurchmessern nachteilig auf die Fokussierung auswirken können und daß für unter schiedliche Rohrdurchmesser der Kegelspiegel (1) auszutauschen ist. Instead of the two rotating plane mirrors ( 11 ), a conical mirror ( 1 ) (see FIG. 2), which is attached symmetrically to the tube axis, can also be used. The advantage here is that the conical mirror ( 1 ) can be fixed and therefore does not have to perform any rotation synchronized to the rotating devices with the aspherical mirror. The disadvantage here is that additional formation errors can arise from the circular conical surface, which can have a disadvantageous effect on the focus, in particular with smaller pipe diameters, and that the conical mirror ( 1 ) must be exchanged for different pipe diameters.

Durch das gleichzeitige Arbeiten (Schneiden) mit zwei Laserspots wird für das Durchtrennen des Rohres (Schneidprozeß) nur eine halbe Umdrehung (0° bis 180°) der Schneidvorrichtung benötigt, bis durch die zwei spiralförmigen Schnittlinien ein Durchtrennen mit kreisbogenförmiger Quer schnittsfläche ausgeführt ist. Die zweite halbe Umdrehung (180° bis 360°) der Schneidvorrichtung kann für weitere Funktionen im Prozeßablauf, z. B. zum Auswerfen des abgeschnittenen Rohr stücks genutzt werden. Der Schneidprozeß verläuft synchron mit einem zeitlich gesteuerten La serimpuls.By working (cutting) with two laser spots at the same time, cutting the Tube (cutting process) only requires half a turn (0 ° to 180 °) of the cutting device, until a cut with an arcuate cross through the two spiral cutting lines cutting surface is executed. The second half turn (180 ° to 360 °) of the cutter can be used for other functions in the process flow, e.g. B. to eject the cut tube used. The cutting process is synchronized with a timed La serimpulse.

Die zum Schneiden verwendeten zwei separaten Laserstrahlen können vorteilhafterweise durch Strahlteilung (50 : 50%) aus dem Strahl (14) einer Laserquelle erzeugt werden, weil dadurch die Synchronität von Laserpuls zur Bewegung der Schneideinrichtungen nur einmal einzustellen ist. Prinzipiell können aber auch zwei zur Drehbewegung synchronisierte Laserquellen benutzt werden. In Fig. 1 bis 3 ist dargestellt, wie von einer Laserstrahlquelle durch Strahlteilung die zwei Teilstrah len jeweils in Achsrichtung zu den Drehbewegungsvorrichtungen durch Planspiegel (2) eingespie gelt werden, zu den Asphärenspiegel reflektiert und durch letztere fokussiert werden.The two separate laser beams used for cutting can advantageously be generated by beam splitting (50: 50%) from the beam ( 14 ) of a laser source, because this means that the synchronism of the laser pulse with the movement of the cutting devices can only be set once. In principle, however, two laser sources synchronized to the rotary movement can also be used. In Fig. 1 to 3 it is shown how from a laser beam source by beam splitting the two partial beams len in the axial direction to the rotary motion devices are inserted by plane mirror ( 2 ), reflected to the aspherical mirror and focused by the latter.

Die asphärischen Spiegel (3) können aber auch Planspiegel sein, wenn die Fokussierung der Laser strahlen durch eine andere vor- oder nachgeschaltete Strahlfokussierung erreicht wird. So können z. B. die um die Rohrachse synchron zu den Drehvorrichtungen rotierenden Planspiegel auch durch zwei kurzbrennweitige Fokussierspiegel mit positiver Brennweite ersetzt werden.The aspherical mirrors ( 3 ) can, however, also be plane mirrors if the focusing of the lasers is achieved by another upstream or downstream beam focusing. So z. B. the plane mirror rotating in synchronism with the rotating devices can also be replaced by two short focal length focusing mirrors with a positive focal length.

Durch die Neigung des Kegelspiegels (1) bzw. der Planspiegel (11), die Geschwindigkeit der Vor schubbewegung des Rohres bzw. des Zylinders (6) und die durch die Drehung der Spiegel (3) aus gelöste Wanderung der zwei Laserstrahlen auf dem Kegelspiegel (1) bzw. auf und mit den Plan spiegeln (11), deren Neigungsgröße die Vorschubbewegung des Rohres bzw. Zylinders berücksich tigt, wird erreicht, daß der Schnitt auf der Rohr- bzw. Zylinderoberfläche selbst gerade ist.Due to the inclination of the cone mirror ( 1 ) or the plane mirror ( 11 ), the speed of the advance movement of the tube or the cylinder ( 6 ) and the migration of the two laser beams on the cone mirror ( 3 ) triggered by the rotation of the mirror ( 3 ) 1 ) or mirror on and with the plan ( 11 ), the incline size takes into account the feed movement of the tube or cylinder, it is achieved that the cut on the tube or cylinder surface itself is straight.

In Fig. 3 u. 4 bilden die Asphärenspiegel (4, 5) mit negativer und positiver Brennweite ein Teleskop (12). Durch die Linearbewegung wird die Brennweite des Teleskops (12) verändert, wodurch die Fokuslage der Rohrquerschnittsform (rund bis vieleckig) angepaßt werden kann. Eine weitere Möglichkeit der Brennweitenanpassung, ohne Verwendung eines Teleskops, kann durch gesteuer tes Verschieben der Lagerung der Drehvorrichtungen (7 und 8) in Richtung des Rohrachse durch eine Linearbewegung erfolgen.U in Fig. 3. 4, the aspherical mirrors ( 4 , 5 ) with negative and positive focal lengths form a telescope ( 12 ). The focal length of the telescope ( 12 ) is changed by the linear movement, as a result of which the focus position of the tube cross-sectional shape (round to polygonal) can be adapted. Another possibility of adjusting the focal length without using a telescope can be done by controlled displacement of the bearing of the rotating devices ( 7 and 8 ) in the direction of the tube axis by a linear movement.

In Fig. 4 ist dargestellt, wie die großen Planspiegel den Strahlversatz in eine Strahlbewegung par allel zur Rohrachse umformen. Für einen wenig gewellten Querschnitt kann zusätzlich die Bahnge schwindigkeit auf der Kreisbahn gesteuert werden (Servomotor) oder die Kreisbahn durch eine kreisbogenförmige Bahn mit konstanter Drehgeschwindigkeit (Kulissenbahnkurve) verwendet wer den.In Fig. 4 it is shown how the large plane mirror transform the beam offset into a beam movement par allel to the pipe axis. For a slightly wavy cross-section, the path speed can also be controlled on the circular path (servo motor) or the circular path can be used by an arc-shaped path with a constant rotational speed (sliding path curve).

Mit der erfindungsgemäßen Vorrichtung bzw. dem erfindungsgemäßen Verfahren konnten die Nachteile des Standes der Technik beseitigt werden.With the device according to the invention or the method according to the invention, the Disadvantages of the prior art can be eliminated.

Reference list

11

Kegelspiegel
Cone mirror

22nd

Umlenkspiegel
Deflecting mirror

33rd

Asphärenspiegel
Aspherical mirror

44th

Asphärenspiegel mit positiver/negativer Brennweite im Teleskop
Aspherical mirror with positive / negative focal length in the telescope

55

66

Rohr- bzw. Zylinder
Pipe or cylinder

77

Drehvorrichtung für einen Laserstrahl
Rotating device for a laser beam

88th

Drehvorrichtung für den anderen Laserstrahl
Rotating device for the other laser beam

99

Mittelpunkt der durch den Spiegel (Center of the through the mirror (

33rd

) hervorgerufenen Kreisbahn des einen Laserstrahls
) induced circular path of a laser beam

1010th

Mittelpunkt der durch den Spiegel (Center of the through the mirror (

33rd

) hervorgerufenen Kreisbahn des anderen Laserstrahls
) induced circular path of the other laser beam

1111

Planspiegel, die anstelle des Kegelspiegels (Plane mirror instead of the cone mirror (

11

) eingesetzt werden
) are used

1212th

Teleskop
telescope

1313

Strahlteiler
Beam splitter

1414

Ausgangslaserstrahl
a)Abstand der Drehachse des einen Spiegels (Output laser beam
a) distance of the axis of rotation of one mirror (

33rd

) von der Rohrachse
b)Abstand der Drehachse des anderen Spiegels () from the pipe axis
b) distance of the axis of rotation of the other mirror (

33rd

) von der Rohrachse
c)Abstand des einen Spiegel () from the pipe axis
c) distance of one mirror (

33rd

) von seiner Drehachse
d)Abstand des anderen Spiegels () from its axis of rotation
d) distance of the other mirror (

33rd

) von seiner Drehachse
) from its axis of rotation

Claims

1. Device for the continuous cutting (cutting) of pipes and other components with any, in particular round cross-sectional shape by means of a laser, suitable devices being arranged for the continuous feed of the pipe to be cut or cylindrical component ( 6 ), and first a component for Generation of two laser beams is seen before, characterized in that a mirror ( 3 ) is then arranged for each of the two laser beams for focusing at a distance a + c or b + d from the tube axis, each of these mirrors ( 3 ) is each attached to a rotary movement device ( 7 or 8 ) and both are arranged offset from one another by 180 °, and the respective axis of rotation about which the mirrors ( 3 ) are rotated at the defined distance c or d by a distance (a) or (b) away from the tube axis but running parallel to this ver and finally at least one reflective optical element nt ( 1 ) or ( 11 ) is arranged, which meet the two laser beams offset by 180 °, and which is designed in combination with the rotational movement of the two mirrors ( 3 ) and the distances c and d from its axis of rotation that the two laser beams offset by 180 ° impinge on one edge of the reflective optical element ( 1 ) or ( 11 ) at the beginning of the cutting or cutting process and continuously rotate to the other edge of the reflective optical element ( 1 ) or ( 11 ).

2. Apparatus according to claim 1, characterized in that the finally arranged reflecting optical element is a fixed conical mirror ( 1 ) which extends around the pipe or cylindrical component to be cut and is inclined to the intended cutting process.

3. Apparatus according to claim 1, characterized in that the finally arranged reflecting optical element are two plane mirrors ( 11 ) which have an inclination corresponding to the intended lengthening process and are rotatably mounted so that they can be moved syn chronously to the movement of the laser spots to ensure that each of the two laser spots hits the associated plane mirror ( 11 ) at all times during the cutting process.

4. Device according to one of claims 1 to 3, characterized in that the mirror gel ( 3 ) are aspherical mirrors.

5. The device according to one or more of claims 1 to 4, characterized net that distance a is equal to distance b and / or distance c is equal to distance d.

6. Device according to one of claims 1 to 5, characterized in that the two laser spots at the beginning of the cutting process offset by 180 ° in each case at the upper edge of the conical mirror ( 1 ) or the plane mirror belonging to them ( 11 ) and at the end of the cutting process after a rotation on the pipe or cylinder surface by 180 ° at the lower edge of the conical mirror ( 1 ) or the plane mirror ( 11 ) belonging to them.

7. Device according to one of claims 1 to 6, characterized in that a deflection mirror ( 2 ) is arranged for each of the two cutting laser beams between the laser beam source and the mirror ( 3 ) at a distance a or b from the tube axis, which is thus exactly on the axis of rotation of the respective mirror ( 3 ) and from each of the sem has a distance c or d, and that each of these two deflecting mirrors ( 2 ) is rotatably mounted synchronously with the rotation of the respective mirror ( 3 ), so that the respective deflecting mirror ( 2 ) can perform a synchronous rotational movement about its own axis with the respective mirror ( 3 ) and the respective laser beam can be guided unchanged and without spatial deviations during the entire cutting process to the respective mirror ( 3 ).

8. The device according to claim 7, characterized in that the respective deflecting mirror ( 2 ) is arranged so that the axis of rotation of the associated mirror ( 3 ) runs exactly through the center of the respective deflecting mirror ( 2 ).

9. Device according to one of claims 1 to 8, characterized in that for catching irregularities in the tube or cylinder cross-sectional shape (for example, cross-sectional shapes from round to polygonal) for each of the two lasers between the respective laser beam source and the respective one Mirror ( 3 ) or, if a deflecting mirror is present, a telescope ( 12 ) is arranged between the respective laser beam source and the respective deflecting mirror ( 2 ).

10. The device according to claim 9, characterized in that the telescope ( 12 ) consists of at least one aspherical mirror with a negative focal length and at least one aspherical mirror with a positive focal length.

11. The device according to claim 10, characterized in that the telescope ( 12 ) consists of egg nem aspherical mirror ( 4 , 5 ) with positive and negative firing mode.

12. The device according to one of claims 1 to 11, characterized in net that two independently working La to generate the two laser beams are arranged.

13. The device according to one of claims 1 to 11, characterized in that for generating the two laser beams only one laser beam source and this arranged a beam splitter ( 13 ) is arranged.

14. The apparatus according to claim 13, characterized in that the beam splitter ( 13 ) nachge arranges a separate mirror system for each of the two laser partial beams, but at least one further deflecting mirror is arranged so that the respective laser partial beam to the respective mirror ( 3 ) or to the respective Deflecting mirror ( 2 ) arrives.

15. The apparatus according to claim 13 or 14, characterized in that the beam splitter ( 13 ) is a semi-transparent mirror.

16. The apparatus according to claim 15, characterized in that for both partial laser beams, the beam splitter ( 13 ) is itself part of the mirror system downstream of it.

17. The apparatus according to claim 15 or 16, characterized in that the beam splitter ( 13 ) directs each of the laser beams onto one of the mirrors ( 3 ) or the deflecting mirror ( 2 ).

18. The apparatus according to claim 17, characterized in that for this case for the other laser partial beam the beam splitter ( 13 ) is arranged only a deflecting mirror, from which this partial laser beam is guided to the mirror ( 3 ) or to the deflecting mirror ( 2 ) .

19. Process for the continuous cutting (cutting) of pipes and other cylindrical Components with any, in particular round, cross-sectional shape using a laser, in which the ab lengthening pipe or the cylinder to be cut continuously along its longitudinal axis is moved forward, the speed of the feed movement of the tube or Cylinder determined from the length of the pipe section or cylinder section to be cut the cutting to length does not take place parallel to the main time, but for cutting at the same time two laser spots offset by 180 ° are generated and focused, characterized by net that the two laser spots offset by 180 ° as perpendicular as possible to the tube or Zy Cut the surface of the linder and turn it synchronously over the pipe or cylinder r surface that take into account the feed movement of the tube or cylinders whose speed and the length of the section to be cut, each of the both laser beams during the cutting process only 180 ° of the pipe or cylinder surface across the circumference, synchronously with the feed movement of the pipe or cylinder or their feed speed is carried along, thus at the starting point of the Cutting of the respective other laser beam ends and an almost straight cut ent stands, then the laser spots of the two laser beams back to their starting points from The beginning of the cutting process can be performed without a cutting process taking place during During this time, the pipe or the cylinder are moved so far that under consideration adjustment of the length of the sections to be cut a new cutting process can begin.

20. The method according to claim 19, characterized in that during the time in which the Both laser spots are returned to the starting points of the cutting process, the lasers rays are switched off.

21. The method according to claim 20, characterized in that pulse lasers are used, which have a pulse frequency that takes into account that the laser beams are only 180 ° Brush over the circumference of the pipe or cylinder surface, the next 180 ° are switched etc. as long as the overall length process is running.

22. The method according to any one of claims 19 to 21, characterized in that the guidance of the two laser beams offset by 180 ° during the cutting process synchronously to one another, to the feed movement or feed speed of the tube or cylinder and to the desired length of the to be cut to length pipe or cylinder piece is achieved in that each of the 180 ° offset laser beams is guided to a mirror ( 3 ), this mirror ( 3 ) is rotatably mounted and in sync with each other because of the mirror ( 3 ) and below Taking into account the feed speed of the tube res or cylinder to the desired length of the pipe or cylinder section to be cut to length at a distance c or d from the respective axis of rotation of the respective mirror ( 3 ), which in turn is at a distance a or b from the tube axis , is rotated about its axis of rotation, the respective laser beam being rotated through 180 ° a uf hits the mirror ( 3 ) and from the respective mirror ( 3 ) both laser beams, each offset by 180 °, are guided onto a reflecting optical element ( 1 ) or ( 11 ), from which both laser beams are guided onto the pipe or cylinder surface are, then the cutting process is ended in which both laser beams are switched off and during this time the mirror ( 3 ) is rotated through the remaining 180 °, so that a new cutting process can then begin with the laser beams being switched on again.

23. The method according to claim 22, characterized in that the distance a is equal to the Ab stand b and / or distance c is equal to distance d.

24. The method according to claim 22 or 23, characterized in that the reflective op table element is a fixed, around the entire tube or the entire cylinder leading conical mirror ( 1 ) which has an inclination corresponding to the respective Ablängvorgan and that each Both laser beams from the beginning to the end of the cutting process are each guided from the upper to the lower edge of the conical mirror ( 1 ).

25. The method according to any one of claims 22 or 23, characterized in that a planar mirror ( 11 ) is used as the reflecting optical element for each of the two laser beams, which is rotated analogously and synchronously with the rotary movement of the respective mirror ( 3 ), which accordingly the intended cutting process is inclined and with which the respective laser beam is thus guided onto the surface of the tube or cylinder during the entire rotation of the respective mirrors ( 11 ) and ( 3 ) by 180 ° during the cutting process.

26. The method according to any one of claims 22 to 25, characterized in that the mirror ( 3 ) is an aspherical mirror.

27. The method according to any one of claims 22 to 26, characterized in that each of the two laser beams after the respective laser beam source and before the respective mirror ( 3 ) is still guided on a rotatably mounted deflection mirror ( 2 ) and this respective deflection mirror ( 2 ) at a or b distance from the tube axis and at a distance c or d to the respective mirror ( 3 ) such that the axis of rotation of the mirror ( 3 ) runs exactly through the center of the deflecting mirror ( 2 ) and that, due to to rotate the respective mirror ( 3 ) about its axis of rotation, synchronously rotating the respective deflecting mirror ( 2 ) about the same turning axis, the respective laser beam impinging on the respective deflecting mirror ( 2 ) is deflected by the latter precisely onto the respective mirror ( 3 ).

28. The method according to any one of claims 22 to 27, characterized in that for catching irregularities in the tube or cylinder cross-section (for example cross-sectional shapes from round to polygonal) for each of the two laser beams between the respective laser beam source and the respective mirror ( 3 ) or If present, a telescope ( 12 ) is switched between the respective laser beam source and the respective deflecting mirror ( 2 ), which consists of at least one aspherical mirror with positive and at least one aspherical mirror with negative firing mode.

29. The method according to any one of claims 19 to 28, characterized in net that each of the two laser beams separately from a separate laser beam source is produced.

30. The method according to any one of claims 19 to 28, characterized in that the two laser beams generated by a common laser beam source from a single laser beam by means of beam splitter ( 13 ) and then separated from one another by the beam splitter ( 13 ) optionally via separate mirror systems each mirror ( 3 ) or, if available, to the respective deflecting mirror ( 2 ).

31. The method according to claim 25, characterized in that a semi-transparent mirror is used as the beam splitter ( 13 ).