Laser Cutting

LASER is L = Light A = Amplification by S = Stimulated E = Emission of R = Radiation

Scientific Applications Industrial Applications Military Applications Laser Applications Daily Applications Medical Applications Scientific Applications Industrial Applications Military Applications Special Applications Surgery:  Eyes General Dentistry Dermatology Diagnostic Fluorescence Soft Laser Basic Scientific Research   Spectroscopy Nuclear Fusion  Cooling Atoms   Short Pulses, Study of Fast Processes Measurements   Straight Lines Material Processing Spectral Analysis Laser range-finder   Target designation   Laser weapons Laser blinding Energy Transport  Laser Gyroscope Fiber Lasers Compact disk Laser printer Optical disc drives Optical computer Bar code scanner Holograms against forgery Fiber optic communications Free space communications Laser shows Holograms Kinetic sculptures

Cutting Welding Hardening Melting Evaporating Photolithography 3-D Laser measurements 3-D Stereo lithography

Vision LWI IV Nd:YAG laser welding machine

Bystronic Bysprint 3015 Co2 laser cutting machine

CAB laser marking machine

Industrial Laser

Laser Cutting When the focused laser beam impinges on the surface of the workpiece, the material partly vaporises.The resulting cutting kerf is surrounded by molten material which is continuously ejected during the cutting process by a stream of cutting gas .

Laser-types semi-conductor - Laser solid - Laser ruby (Al-Oxide doped with Cr) - Laser "YAG"(Yttrium-Al-Granat) - Laser gas - Laser ions (Ar + Kr + only one gas charge) - Laser molecular (CO2 + N2 + He) - Laser

C02 laser For cutting and welding the C02 laser is preferred. The used gas is a mixture between 4,5% CO2, 13,5% N2 and 82% He. Cuttable are metallic materials plastics wood and ceramic.

Which materials can be cut? The C02 laser can be used to cut a wide range of different materials, for instance, steel and steel alloys, galvanised sheet steel, stainless, aluminium, hardened, metal or plastic-coated steels, as well as titanium, niobium, tantalum, nickel and alloys of these metals. The laser can also be used for cutting a large number of plastics, as well as leather, wood, rubber, wood, cotton, cardboard/paper, various ceramic materials.

Cutting gas When cutting ordinary low-alloy steel, the use of oxygen can increase the cutting speed by 25-40 %, as compared with the cutting speed using compressed air. High purity oxygen (better than 99.7 %) gives the highest cutting speed. The high velocity gas jet serves mainly to: 1 ) aid in material removal by blowing out excess material through the backside of the workpiece; 2) protect the lens from spatter ejected from the cut zone; 3) assist in the burning process.

CO2 Laser Cutting gas application Carbon steel and alloyed steel > used oxygen as cutting gas. Stainless steel > used inert gas as cutting gas. Aluminium > used inert gas as cutting gas with high laser energy intensity.

Laser Advantage Precision (tolerance and surface finish) small cut widths (narrow kerfs;0.1mm. for thin material) the cut edges are smooth, clean, and square. point source, can move in any direction Productivity (high speed and low cost) Very low distortion and metallurgical effect. Automation (CNC, robot etc.) Most materials can be processed (hard, abrasive, soft, sticky materials) Quality and reliability

THANK YOU FOR YOUR ATTENTION