DE102019100293A1 - Process for machining a workpiece - Google Patents
Process for machining a workpiece Download PDFInfo
- Publication number
- DE102019100293A1 DE102019100293A1 DE102019100293.1A DE102019100293A DE102019100293A1 DE 102019100293 A1 DE102019100293 A1 DE 102019100293A1 DE 102019100293 A DE102019100293 A DE 102019100293A DE 102019100293 A1 DE102019100293 A1 DE 102019100293A1
- Authority
- DE
- Germany
- Prior art keywords
- laser beam
- workpiece
- laser
- welding
- heated
- 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.)
- Withdrawn
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
- B23K26/60—Preliminary treatment
-
- 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
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/062—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam
- B23K26/0622—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
-
- 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
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/062—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam
- B23K26/0622—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
- B23K26/0624—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses using ultrashort pulses, i.e. pulses of 1ns or less
-
- 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
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
-
- 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
- B23K26/20—Bonding
- B23K26/32—Bonding taking account of the properties of the material involved
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/12—Copper or alloys thereof
Abstract
Bei einem Verfahren zum Bearbeiten eines Werkstücks mit einem Laser, wobei der Laserstrahl von einer Laserquelle auf das Werkstück aufgebracht wird, sodass das Werkstück im Bereich des Auftreffens des Laserstrahls erhitzt wird, soll auf das Werkstück ein Schweisslaserstrahl aufgebracht werden.In a method for processing a workpiece with a laser, wherein the laser beam is applied to the workpiece from a laser source, so that the workpiece is heated in the area where the laser beam strikes, a welding laser beam is to be applied to the workpiece.
Description
Die Erfindung betrifft ein Verfahren zum Bearbeiten eines Werkstücks mit einem Laser, wobei der Laserstrahl von einer Laserquelle auf das Werkstück aufgebracht wird, sodass das Werkstück im Bereich des Auftreffens des Laserstrahls erhitzt wird.The invention relates to a method for processing a workpiece with a laser, the laser beam being applied to the workpiece from a laser source, so that the workpiece is heated in the area where the laser beam strikes.
Stand der TechnikState of the art
Eine Vielzahl von Werkstücken wird heute mit Laser bearbeitet. Nur beispielsweise soll die Metallbearbeitung erwähnt werden. Der Laser dient zum Schneiden, Schweißen, Abtragen usw. Dabei reagieren natürlich unterschiedliche Materialien, aus denen das Werkstück bestehen kann, auch unterschiedlich. So ist zum Beispiel bekannt, dass es hochreflektierende Materialien gibt, welche den Laser zum großen Teil reflektieren, sodass er seine Wirkung nicht in dem gewünschten Umfang entfalten kann. Ferner gibt es auch absorbierende Materialien, welche die vom Laser aufgebrachte Wärmeenergie sehr schnell ableiten, was wiederum die Wirkung des Lasers beeinträchtigt. Nur beispielsweise wird auf Kupfer verwiesen, welches den Laserstrahl sowohl reflektiert als auch absorbiert. Dementsprechend gestaltet sich die Bearbeitung von derartigen Materialien schwierig und nimmt Zeit in Anspruch.A large number of workpieces are processed with lasers today. Metalworking should only be mentioned as an example. The laser is used for cutting, welding, ablation, etc. Of course, different materials from which the workpiece can consist also react differently. For example, it is known that there are highly reflective materials that largely reflect the laser so that it cannot have the desired effect. There are also absorbent materials that dissipate the thermal energy applied by the laser very quickly, which in turn impairs the effect of the laser. For example, reference is made to copper, which both reflects and absorbs the laser beam. Accordingly, the processing of such materials is difficult and takes time.
Aufgabetask
Aufgabe der vorliegenden Erfindung ist es, ein Verfahren der oben genannten Art bereitzustellen, mit welchem Werkstücke aus insbesondere hochreflektierenden Materialien wirkungsvoller bearbeitet werden können.The object of the present invention is to provide a method of the type mentioned above, with which workpieces made in particular of highly reflective materials can be processed more effectively.
Lösung der AufgabeSolution of the task
Zur Lösung der Aufgabe führt, dass auf das Werkstück ein Schweisslaserstrahl aufgebracht wird.The task is solved by applying a welding laser beam to the workpiece.
Grundgedanke der vorliegenden Erfindung ist es, das Werkstück mit dem ersten Laserstrahl quasi vorzubereiten, sodass dann der Schweisslaserstrahl wirkungsvoll ist. Mit dem ersten Laserstrahl wird das Material des Werkstücks erhitzt, wodurch die Reflektions- und die Absorptionsfähigkeit stark herabgesetzt wird. Für Kupfer ist beispielsweise bekannt, dass die Wirkung des Lasers bei Raumtemperatur auf nur 10 % absinkt. Wird dieses Werkstück aus Kupfer jedoch erhitzt, steigt die Absorptionsfähigkeit für die Laserenergie sehr stark an, sodass der Laser in vollem Umfang seine Wirkung entfalten kann. Diesen Übergang nutzt die vorliegende Erfindung.The basic idea of the present invention is to prepare the workpiece with the first laser beam, so that the welding laser beam is then effective. The material of the workpiece is heated with the first laser beam, which greatly reduces the reflectivity and the absorption capacity. For copper, for example, it is known that the effect of the laser drops to only 10% at room temperature. However, if this workpiece made of copper is heated, the absorption capacity for the laser energy increases very strongly, so that the laser can fully develop its effect. The present invention makes use of this transition.
Für den ersten Laserstrahl werden bevorzugt kurze Pulse im Nanosekundenbereich oder kürzer mit einer Pulsenergie im Bereich von 1 Mill Joule verwendet. Auch Pulse im Femto -oder Picosekundenbereich sind denkbar. Dadurch werden hohe Pulsspitzenleistungen erzielt und die hohe Anfangsreflexion überwunden, jedoch sehr wenig Material verdampft, sodass kein/e erkennbare/s Loch/Pore entsteht.Short pulses in the nanosecond range or shorter with a pulse energy in the range of 1 mill joule are preferably used for the first laser beam. Pulses in the femto or picosecond range are also conceivable. This achieves high pulse peak outputs and overcomes the high initial reflection, but evaporates very little material, so that no discernible hole / pore is created.
Der Schweisslaser arbeitet dagegen z.B. im Millisekundenbereich mit einer Energie von z.B. 100 Mill Joule. Auch dies ist aber nur beispielhaft, die Schweißdauer kann auch länger sein, sogar bis hin zum kontinuierlichen Schweißen.The welding laser, on the other hand, works e.g. in the millisecond range with an energy of e.g. 100 mill joules. But this is also only an example, the welding time can also be longer, even up to continuous welding.
Bevorzugt wird natürlich der Schweisslaserstrahl auf den gleichen Punkt aufgebracht, wie der erste Laserstrahl. Dies soll für die Erfindung aber nicht einschränkend sein, es genügt, wenn der Schweisslaserstrahl im durch den erstenLaserstrahl erwärmten Bereich des Werkstücks aufgebracht wird.The welding laser beam is of course preferably applied to the same point as the first laser beam. However, this is not intended to be restrictive for the invention, it is sufficient if the welding laser beam is applied in the region of the workpiece heated by the first laser beam.
Auch zeitlich gesehen ist es denkbar, dass der Schweisslaserstrahl zusammen mit dem ersten Laserstrahl aufgebracht wird. Allerdings dürfte dann die Wirkung des Schweisslaserstrahls vermindert sein, sodass es ratsam erscheint, den Schweisslaserstrahl nach dem ersten Laserstrahl auf das Werkstück aufzubringen.In terms of time, it is also conceivable that the welding laser beam is applied together with the first laser beam. However, the effect of the welding laser beam should then be reduced, so that it appears advisable to apply the welding laser beam to the workpiece after the first laser beam.
Natürlich können beide Laserstrahlen von getrennten Laserquellen stammen und über einen gemeinsamen oder getrennten Kopf ausgebracht werden. Allerdings wird zukünftig das Ziel sein, nur einen Bearbeitungskopf bereitzustellen. Wie dies letztendlich verwirklicht wird, bleibt einer künftigen Erfindung vorbehalten.Of course, both laser beams can come from separate laser sources and can be applied via a common or separate head. However, the goal in the future will be to provide only one processing head. How this will ultimately be achieved remains a matter of a future invention.
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019100293.1A DE102019100293A1 (en) | 2019-01-08 | 2019-01-08 | Process for machining a workpiece |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019100293.1A DE102019100293A1 (en) | 2019-01-08 | 2019-01-08 | Process for machining a workpiece |
Publications (1)
Publication Number | Publication Date |
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DE102019100293A1 true DE102019100293A1 (en) | 2020-07-09 |
Family
ID=71104598
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102019100293.1A Withdrawn DE102019100293A1 (en) | 2019-01-08 | 2019-01-08 | Process for machining a workpiece |
Country Status (1)
Country | Link |
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DE (1) | DE102019100293A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4007947A1 (en) * | 1990-03-13 | 1991-09-19 | Fraunhofer Ges Forschung | Laser-beam working - using additional energy source to maintain plasma energy coupling capability during time in cycle when main laser beam is switched off |
US20060237402A1 (en) * | 2005-04-22 | 2006-10-26 | Takahiro Nagashima | Laser welding method and laser welding apparatus |
US20150246412A1 (en) * | 2014-02-28 | 2015-09-03 | Ipg Photonics Corporation | Multiple-beam laser processing using multiple laser beams with distinct wavelengths and/or pulse durations |
-
2019
- 2019-01-08 DE DE102019100293.1A patent/DE102019100293A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4007947A1 (en) * | 1990-03-13 | 1991-09-19 | Fraunhofer Ges Forschung | Laser-beam working - using additional energy source to maintain plasma energy coupling capability during time in cycle when main laser beam is switched off |
US20060237402A1 (en) * | 2005-04-22 | 2006-10-26 | Takahiro Nagashima | Laser welding method and laser welding apparatus |
US20150246412A1 (en) * | 2014-02-28 | 2015-09-03 | Ipg Photonics Corporation | Multiple-beam laser processing using multiple laser beams with distinct wavelengths and/or pulse durations |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R163 | Identified publications notified | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |