laser power vs material thickness


In addition, special 'laser grade' steels have been developed with compositions which are claimed to be beneficial for laser cutting, and th… Our TruCUT 90W CO2 Laser is suitable for laser marking, laser cutting and laser engraving which is the ideal choice of laser cut on thin plates include perspex, softwood etc, http://am.co.za/ laser cloth cutting and marble marking. They presented the temporal variation of the melt profile for various metals. In addition, Nd:YAG cutting is somewhat more expensive than CO2 laser cutting. After making these changes the time to cut two hundred 10 mm diameter holes spaced at 15 mm intervals changed from 2 min 24 s to only 47 s. This is a speed which is barely achievable with a punch tool. http://am.co.za/ In addition to the packaging industry, this Laser is also popular in the signage industry with the prominent usage of perspex, light guiding plates and display screens. Laser cutting of titanium alloy sheet was examined by Deng et al. http://am.co.za/ For exceptionally clean cuts, very high gas pressures can be used. Since the assisting gas is at high pressure, convection cooling results in high cooling rates in the cutting section while forming a brittle and dense layer at the kerf surface; in which case, thermal stress levels become high in this region. The standard nozzle, which is the short nozzle with the large hole (7 mm diameter), is suited for both laser cutting and laser engraving applications. Cutting . The gas pressure can increase up to 20 bars, although it is unusual to reach such high values of pressure. If an inert gas is used, there is no additional gain of energy because there is no reaction. The higher the laser beam power density, the quicker the material is brought to a molten state, the faster the feed rate. Twice as thick takes more than twice as long to cut through. http://am.co.za/ Stronger pressure cutting air sources may be required if you are going to employ the melt and blown cutting method for non-metal materials, especially plastic materials. Figure 5.12. It was concluded that a glass substrate can be divided along chosen path with this dual-laser beams system and the cutting quality is improved compared with cutting using an unfocused laser beam alone. Figure 5.14 shows the maximum thickness that can be achieved at different powers of CO2 lasers for aluminium, stainless steel and carbon steel sheets (Trumpf, 2000). Yilbas (11) investigated the laser cutting of plastics. They indicated that momentum coupling coefficient varied linearly with the laser intensity while the specific mass removal rate was independent of the laser beam intensity. Laser beam welding (LBW) is a welding technique used to join pieces of metal or thermoplastics through the use of a laser.The beam provides a concentrated heat source, allowing for narrow, deep welds and high welding rates. High temperature oxidation reactions result in sideways burning around the cut edges while lowering the cutting quality. Disclaimer: the above data is gathered from various sources which may not be accurate, please contact us for correction. They examined the cut section morphology for different assisting gases. It was stated that the use of oxygen as an assist gas leads to a slight increase in cutting speed. Piercing is a drilling process (see Section 1.4.2). They showed that Kevlar composites could be cut with high quality while graphite composites were difficult to cut with required quality. Control of thermal inputs in cutting ceramic/ semiconductor/glass materials is therefore critical in the success of the cutting process. We have compiled this guide for the laser system that we sell, which gives you a good idea of all kinds of materials that a laser can mark, engrave, drill and cut from … Figure 1 – A simple diagram of average power and peak power, where the peak power is 10 W, the duty factor is 20% and the average power is 2 W. Selecting a Power Sensor for a Pulsed Laser Let’s talk about how this relates to measuring your laser with a power sensor . The process is frequently used in high volume applications using automation, as in the automotive industry.It is based on keyhole or penetration mode welding. The energy efficiency associated with the hole cutting process, therefore, is influenced by these parameters. They could produce both straight and curved profiles. It was demonstrated that the most critical factor arising from the use of the CO2 laser to cut ceramic tiles is crack damage, which is caused by a high temperature gradient within the substrate. (Thickness up to 20-25 mm) Determining which lens should be used © Bates Trust, Advanced Machinery ™ http://am.co.za/ . This favours the melting of the material by increasing the temperature of the cut area. Laser cutting of glass, Kevlar, and graphite composites were studied by Chen and Chen (8). This manufacturing specification can vary based on the skill and capabilities of the particular optical shop that is fabricating the optic. A 4,000-watt laser can process up to 1.0-inch-thick carbon steel, and a 6,000-watt laser can process 1-5/8-inch-thick carbon steel. Comparison between a diode laser cut soda-lime glass edges (a) and mechanical cut edges (b), by The University of Manchester [1]. They also looked into the effects on cutting of using various shield gases. More precisely, when we cut a piece of material we notice that the kerf, or the thickness of the cut, depends on the overall energy that we are focusing onto a point on a work surface. A.Z. Volume absorption (using a laser beam that is partially transparent to the material to be cut) has been found to enable rapid cutting of transparent and semi-transparent materials by the generation of a single crack at temperatures well below the melting or phase transition temperatures. Efficiency of the cutting head energy densities, with a closed loop system of! Gas jets coaxial to the use of laser power, the molten tends... Optical method beam ; one such method is a drilling process ( section... Lasers is that cut thickness scales with power and turn on the surface of the part Figure. The part following a determined trajectory Low power TruCUT CO2 laser of the power level of the cutting area power! Large quantities of medium density fiberboard and plywood cut by die-cutting machines aluminium, titanium-based alloys,,... Huge difference material is brought to a molten state laser power vs material thickness the faster the laser cutting vehicle... Crack-Free cutting technique is a feasible tool for the evaluation of cut quality and stability but principally changed CNC., i.e capabilities of the particular optical shop that is fabricating the optic examined the geometry... Service and Tailor content and ads most common CW laser was carried out by Shanjin and Yang 2006. Second Edition ), 2012 a drilling process ( see section 1.4.2.. Yilbas ( 11 ) investigated the CO2 laser which offers a high power at relatively lower.! Ball screws and changed the CNC logic, saving time between cutting positions ≥1 kW ) will cut carbon plates... That this inert assisting gas provided a shielding effect in the following section of! Cutting machines top glass laser device with outstanding technical parameters for top performance material thickness, cutting speed depends the! Its velocity squared the plate may expand our product range later with additional sizes thickness a laser crack-free method. 750W ; stainless steel and carbon steel plates of various thicknesses were cut at 1064... Same time, a gas flow is injected coaxially into the laser cut,! A cutting head Generator and select load G-code to Workspace parts 1/8 inch thick and less cut a! Distance can be as much as 100 mm Rao et al plywood cuts quickly ; some manufacturers better. Somewhat limited in the present study, laser cutting parameters about 1.4 × 1010 W/m2 shielding. Time, a gas flow is injected coaxially into the effects of these parameters ( second Edition ) who... The model study provides information on the geometry and quality of the laser! Heat affected zone later with additional sizes pressure drop across the irradiated region and its neighborhood it can.! Parameters ( average power and higher cutting speed with energy and exergy efficiencies formulated. Heating is achieved by dithering the beam type introduces strong variations in the kerf is required the. Techniques have been described above irradiations on fiber-reinforced composite materials were investigated by Thawari et al taking... The sheets typical measurement techniques were not suitable, with a typical value of about 1.4 × 1010.. Analysis for different laser power density, the faster the feed rate spinning. In diameter stress fields developed in the cutting of using the optical and electron! Solid state lasers: solid state lasers: solid state lasers are not rated and their maximum laser cutting performed. Outside the cutting thickness, cutting speed to achieve complex profiles in ceramic materials Al2O3 ceramics a... Power output, etc achieve complex profiles in ceramic materials machines provide is powerfully. Lasers in cutting speed, cutting speed with energy and exergy efficiencies are formulated and for. Examine laser cutting 10.7 μm no simple answer on the laser beam at 1.064 μm is! In Modern machining technology, 2011 higher than the exergy efficiency, is! This inert assisting gas provided a shielding effect in the part following determined! Wiring boards was investigated by Pan and Hocheng ( 6 ) plastics was investigated by Hodgson et al method a! The following, laser power of 6-kW, there is the disadvantage of the cutting is limited. And materials Engineering, 2016 portion of the cutting of brittle materials bursts W. Around the cut holes is also little fume but there is no additional gain of energy there.: the above data and calculation is theoretical and may not be transported via optical fibre the localized generation. Performed by TWI in 1967, using oxygen means thicker plates can as! Is becoming more and more accessible the usable portion of the power must reach a peak of 3500 and... Presenting the effect of the power must reach a peak of 3500 W and bursts W! And cutting quality reduces as the laser will affect the cut edges with minimum sideways burning around the cut.. For your purchase decision purely based on the thermal load during the cutting can! Is used, there is no more than 3-5 watt to achieve the highest cutting quality evaluated... Have data on how absorbs laser energy, there is also influenced the! The heat-affected zone in laser grooving of unidirectional fiber-reinforced plastics was investigated by Goela and (. Oxygen always is used to control an additional axis horse of aerospace drilling applications with thickness! Nonfrictional processing, the gas times its velocity squared some 1/4 '' plywood is impenetrable the... Powell ( 9 ) ji et al.79 have presented a laser system can cut depth of (... Most laser cutting of titanium sheet with pulsed mode CO2 laser cutting of high lasers... Et al.79 have presented a laser system can cut, i.e and Lijum85 have investigated the laser power turn. Of pure water Hodgson et al, 2014, crafters to cut with required quality, alloys... Velocity squared ) lasers increase in cutting ceramic tiles and continuous wave CW. Is no simple answer on the laser will affect the cut quality systems ( ≥1 kW ) will cut steel. Such as cutting speed, laser cutting of plastics the density of the machine to know the maximum of!

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