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ROBOCUT - Laser Cutting of the Future · ROBOCUT - Laser Cutting of the Future Solid Melt Gas...
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The Robotics and Automation Research Group Department of Mechanical and Manufacturing Engineering ROBOCUT - Laser Cutting of the Future Solid Melt Gas Plasma Heat Heat Pressure Phase change Phase change Phase change Heat Specimen Cutting gas Heat Heat Pressure Heat Heat Pressure Oxygen Air Laser beam Figure 2: Gas and melt flow in traditional CO 2 laser cutting. Figure 3: Gas and melt flow in keyhole fiber laser cutting. Mainly two laser types are used for industrial laser cutting: The well estab- lished CO 2 lasers and the upcoming fiber lasers. The new single mode fiber lasers have high power density and potential for very high speed laser processing. Traditional Laser Cutting Traditional Laser Cutting ROBOCUT Project The project's vision is to develop a revolutionary new remote laser cutting technology, ROBOCUT, where the cutting process is performed with a complex laser beam pattern. Instead of using a cutting gas, a part of the laser beam pattern will create a high evaporation pressure on the molten material. The effect of this is burr free cutting in a wide cutting rate range, high cutting speed, and quality cut kerfs in narrow contour cutting. As a result, the ROBOCUT technology enables significantly faster, cheaper and more flexible cutting than state- of-the-art laser cutting technologies. Figure 5: The ROBOCUT laser cutting set-up. Vision ROBOCUT Principle Remote Laser Cutting Traditional laser cutting uses an assisting cutting gas to blow away the molten material. The gas is delivered through a cutting head just above the specimen. Existing remote cutting techniques: - Deep engraving by IWS: A Laser beam scans over the surface multiple times, resulting in nearly burr free cuts in thin sheets. - Vapour pressure fusion cutting by Trumpf: A defocused beam scans slowly over the surface. This works not only for thin sheets, but the heat affected zone is large and the kerf is strongly convex. Figure 1: Traditional laser cutting. Process Modelling Discussion To find the optimal DOE pattern and to reduce the number of expensive experiments a model of the laser cutting model is made. The main phenomenons to be modelled is the interaction among the four material phases and heat transfer from the laser. The pressure from the evaporating melt is the key factor in ROBOCUT and therefore the most important modelling task. ROBOCUT is a promising laser cutting technology with the following advantages: - Remote laser cutting - Faster cutting than today's state-of-the-art laser cutting (Figures 10 and 11) - No cutting gas needed The ROBOCUT project has a budget of 23 mill. DKK. Of these the Danish High Technology Foundation has invested 13 mill. DKK. The project was launched in October 2010 and runs to October 2014. The seven ROBOCUT project partners are: Figure 9: Overview of the phenomena involved in laser cutting. Laser Cell In December 2011 a laser laboratory will be ready for the first laser cutting experiments at Department of Mechanical and Manufacturing Engineering, Aalborg University, including: - IPG Laser YLS 3000 SM and Trumpf Laser HL 383 D - Kuka Quantec KR120 pro - XY-table with linear servomotor and cutting box - Laser beam analyser system and power meter The core of the ROBOCUT technology is the new cutting head: An advanced optical system with a specially designed artificial hologram, also known as Diffractive Optical Element (DOE), forming the laser pattern from a single laser beam. Figure 4: Deep engraving remote laser cutting of 0.1 mm stainless steel. Figure 10: Traditional laser cutting. Martin Andersen (AAU), Morten Kristiansen (AAU), and Flemming Olsen (IPU) www.robocut.m-tech.aau.dk [email protected] Thanks to our Laser Cell sponsors: Poul Due Jensens Fond, Det Obelske Familiefond, Industriens Fond, The Danish High Technology Foundation, The Faculty of Engineering and Science at Aalborg University MICRONIX IB ANDRESEN INDUSTRI Figure 11: Remote laser cutting. Figure 6: ROBOCUT laser cutting side view. Figure 8: Laser pattern intensity. Figure 7: ROBOCUT laser cutting top view. The laser laboratory established during the project period at Aalborg University, with state-of-the- art laser equipment, enables research in future industrial laser applications. Laser source Collimating optics NC-controlled turnable DOE Focussing optics Scanning mirrors Workpice Articulated robot
Transcript of ROBOCUT - Laser Cutting of the Future · ROBOCUT - Laser Cutting of the Future Solid Melt Gas...
The Robotics and Automation Research GroupDepartment ofMechanical and Manufacturing Engineering
ROBOCUT - Laser Cutting of the Future
Solid Melt Gas Plasma
Heat
HeatPressure
Phasechange Phase
changePhase
changeHeat
Specimen
Cutting gas
Heat Heat
Pressure
Heat Heat
Pressure
Oxygen
Air Laser beam
Figure 2: Gas and melt flow in traditional CO2 laser cutting.
Figure 3: Gas and melt flow in keyhole fiber laser cutting.
Mainly two laser types are used for industrial laser cutting: The well estab-lished CO2
lasers and the upcoming fiber lasers. The new single mode fiber lasers have high power density and potential for very high speed laser processing.
Traditional LaserCutting
TraditionalLaser Cutting
ROBOCUT ProjectThe project's vision is to develop a revolutionary new remote laser cutting technology, ROBOCUT, where the cutting process is performed with a complex laser beam pattern. Instead of using a cutting gas, a part of the laser beam pattern will create a high evaporation pressure on the molten material. The effect of this is burr free cutting in a wide cutting rate range, high cutting speed, and quality cut kerfs in narrow contour cutting. As a result, the ROBOCUT technology enables significantlyfaster, cheaper and more flexible cutting than state-of-the-art laser cutting technologies.
Figure 5: The ROBOCUT laser cutting set-up.
Vision ROBOCUT Principle
RemoteLaser Cutting
Traditional laser cutting uses an assisting cutting gas to blow away the molten material. The gas is delivered through a cutting head just above the specimen.
Existing remote cutting techniques: - Deep engraving by IWS: A Laser beam scans over the surface multiple times, resulting in nearly burr free cuts in thin sheets. - Vapour pressure fusion cutting by Trumpf: A defocused beam scans slowly over the surface. This works not only for thin sheets, but the heat affected zone is large and the kerf is strongly convex.
Figure 1: Traditional laser cutting.
Process Modelling DiscussionTo find the optimal DOE pattern and to reduce the number of expensive experiments a model of the laser cutting model is made. The main phenomenons to be modelled is the interaction among the four material phases and heat transfer from the laser. The pressure from the evaporating melt is the key factor in ROBOCUT and therefore the most important modelling task.
ROBOCUT is a promising laser cutting technology with the following advantages: - Remote laser cutting - Faster cutting than today's state-of-the-art laser cutting (Figures 10 and 11) - No cutting gas needed
The ROBOCUT project has a budget of 23 mill. DKK. Of these the Danish High Technology Foundation has invested 13 mill. DKK. The project was launched in October 2010 and runs to October 2014.The seven ROBOCUT project partners are:
Figure 9: Overview of the phenomena involved in laser cutting.
Laser CellIn December 2011 a laser laboratory will be ready for the first laser cutting experiments at Department of Mechanical and Manufacturing Engineering, Aalborg University, including: - IPG Laser YLS 3000 SM and Trumpf Laser HL 383 D - Kuka Quantec KR120 pro - XY-table with linear servomotor and cutting box - Laser beam analyser system and power meter
The core of the ROBOCUT technology is the new cutting head: An advanced optical system with a specially designed artificial hologram, also known as Diffractive Optical Element (DOE), forming the laser pattern from a single laser beam.
Figure 4:Deep engraving remote laser cutting of0.1 mm stainless steel.
Figure 10: Traditional laser cutting.
Martin Andersen (AAU), Morten Kristiansen (AAU), and Flemming Olsen (IPU)www.robocut.m-tech.aau.dk [email protected]
Thanks to our Laser Cell sponsors:Poul Due Jensens Fond, Det Obelske Familiefond,Industriens Fond, The Danish High Technology Foundation, The Faculty of Engineering and Science at Aalborg University
MICRONIXIB ANDRESEN INDUSTRI
Figure 11: Remote laser cutting.
Figure 6: ROBOCUTlaser cutting side view.
Figure 8: Laser pattern intensity.
Figure 7: ROBOCUT lasercutting top view.
The laser laboratory established during the project period at Aalborg University, with state-of-the-art laser equipment, enables research in future industrial laser applications.
Laser source
Collimating optics
NC-controlledturnable DOE
Focussingoptics
Scanningmirrors
Workpice
Articulated robot
