We deliver LASERLINE process gases to meet your specific nitrogen purity needs, thus helping to maximise your productivity and return on investment. Once this is completed, we can then move on to our feedrate. It is not recommended to continuously process for a long time. The generation portion of the system will meet the average hourly flow rate, and the design incorporates a high-pressure 4,500 psig nitrogen compressor that fills high-pressure nitrogen cylinders. During the laser cutting process, a laser is used as a heat source to melt or vaporize materials. For example,if purity decrease from 99.5% to 98%,the cutting speed will be 25% slower,but gas consumption will be 50% higher.Generally the purity need to be above 95%. As the laser is making the cut, the oxygen helps burn through the metal. Nozzle: laser beam and cutting gas meet the workpiece through the cutting nozzle. This can lead to slightly slower cutting speeds with certain metals but can result in reduced gas consumption and lower operating costs. For flame cutting, oxygen is used as the cutting gas; this is blown into the kerf with a pressure of up to 6 bar. "When using nitrogen assist gas, cutting edges will bronze a bit. A) Fusion Cutting (high pressure cutting): The material is fused by the energy of the laser beam. Estimate how many hours you get out of each item (3000 hours on lens, could be less depening on power and gas pressure).-Laser gas consumption (get flow rate, cost of bottle, volume of bottle and calculate $/hour)-Assist gas. Adjust the gas pressure up or down until the best possible edge quality is visually achieved. To cut .25-in. Majority of companies are currently using high pressure cylinders/ dewars for these applications. Using nitrogen will provide a cut edge not quite as smooth as when using argon. 3. Because such auxiliary gas can prevent the material from burning, the inert gas is used to cut aluminum alloy material. A's far as the 3800w on the screen , it is possible that your calirimeter is not calibrated. In laser thermal cutting, assist gas must be used to remove melted metal; consequently, a large number of radioactive aerosols can be generated. Laser Assist Gas Systems Chart launched the first Trifecta system 30 years ago to support the increasing power and capabilities of the laser cutting and welding industry. Begin by setting feed rate 10% below the recommended setting. material in CO 2 may call for a 2.5-mm-diameter nozzle; but because in a fiber laser cutting situation the kerf is usually narrower, the application may require a 3-mm-diameter nozzle. Cutting method using a laser having at least one ytterbium-based fibre, in which at least the power of the laser source, the diameter of the focused beam and the beam quality factor are controlled. If . While nitrogen remains the most widely used laser cutting gas, air is proving to be an effective and cost-saving . Laser cutting titanium offers similarities to cutting stainliness steel. The stability of the gas pressure is an important guarantee for the cutting quality of the laser cutting machine. The gas jet also protects the focussing optics from splashes. That said, never say never. Finally.When the laser cutting machine cuts ordinary carbon steel, the thicker the material, the lower the . If it holds steady, you might try physically moving the has hose that connects to the machine from oxygen to nitrogen. The effect of cutting gas pressure: Firstly. 1. "I've seen 1-in.-thick stainless steel cut with high-performance air," Albrecht said. In this article, we list the relevant parameters of IPG and Raycus lasers, including cutting thickness, cutting speed, auxiliary gas, focus, pressure and cutting head size. While typically used for industrial manufacturing applications, it is now used by schools, small businesses, architecture, and hobbyists. The 3870H regulator is specifically designed to meet the high flow, high pressure assist gas requirements of the laser cutter. Cutting with lower air pressure can prevent frosting. To cut the materials with a high-quality edge, an assist gas blows through a cutting nozzle on the laser cutting head. Laser cutting is a technology that uses a laser to vaporize materials, resulting in a cut edge. It was discovered that if the pulse conditions are optimized, the maximum cutting speed for a set average laser power could be increased by up to 10% compared to low oxygen pressure continuous wave (CW) laser cutting. Secondly.When the gas pressure is too high, the penetration point is to form a large melting point, which affects the quality of the cutting. Nitrogen Generators for Laser Cutting Industry Our company has been providing nitrogen gas generators for laser cutting for over 20 years. 1. Generally speaking, the larger the laser power, the thicker the cutting board and the faster-cutting speed. . Higher pressure settings are typically necessary for steel cutting machines in particular. If you take the back left cover off of the laser you will need to locate a pressure regulator.the reading is critical to maintain a certain side beam. It is not uncommon for the nitrogen flow rates on laser cutting manuals to be overstated. The listed IPG lasers include 1000W, 1500W, 2000W, 3000W, 4000W, 6000W, 8000w, etc. The QB3H is designed and developed specifically for laser cutting applications where oxygen is being used as a piercing gas and pressure . When . hookie1985 (Industrial) 15 Jun 16 13:09. 2) When the gas pressure is too high, the penetration point is melted to form a large melting point, which affects the quality of the cutting. In laser thermal cutting, assist gas must be used to remove melted metal; consequently, a large number of radioactive aerosols can be generated. I hope it will be helpful to you. It's hard to imagine an effective laser cutting operation with 1.25-in.-thick carbon steel being cut by a laser beam surrounded not by purified oxygen but by a jet of air. NITROGEN . 2. Whether your source gas is cryogenic or high pressure, this regulator can handle the job. In highly alloyed steels, such as stainless steel, expelled metal may cling to the cut backside. Control of gas pressure, shape of the gas stream, and positioning of the gas nozzle orifice above the metal surface are critical factors. Our units can also generate the high pressure you require. Our systems produce nitrogen from purities of 99% to 99.999%. Description. 1) When the gas pressure is too low, the fiber laser cutter cannot easily cut through the board, thus punching time shall increase, and low efficiency 2) When gas pressure is too high, the breakthrough point can be melt down with popping occurred. If you are not getting a good cut from your laser, you may be experiencing any of the following: Good mode (TEM 00e d o m d a )B. As a laser type TruLaser 1030 technological system was used. The gas cutting process is a preheating-burning-slag blowing process, but not all metals can meet the requirements of this process. 2) When the gas pressure is too high, the penetration point is melted to form a large melting point, which affects the quality of the cutting. To reduce the generation of aerosols, the assist gas pressure should be lowered. If it drops way down,your machine is "starving" for gas. 1.The Purity Of Laser Cutting Oxygen Gas The higher oxygen gas purity,the quicker laser cutting speed,the less gas comsumption. . The theoretical analysis was used to explain the common problems and phenomena found in high-pressure gas-assisted . This depends on material to be cut (get flow rate for a couple of materials, get price/volume unit, calculate $/hour) All Trifecta models offer instantaneous operations with pressures up to 550 psig and state of the art control panels to allow remote monitoring. Our systems can feed as little as one laser to over a dozen. Laser cutting involves focusing a laser light using optics. A 2.5-mm nozzle may require 2,000 cubic feet per hour (CFH), and the 3-mm nozzle may have a gas flow rate of 3,500 CFH. Oxygen-assist laser cutting is the standard process for mild steel applications. The process vaporizes the metal, and before the vaporized metal can resolidify, the nitrogen gas moves it away from the cut edge. We have built systems to produce over 500 PSI constantly. The focused laser beam burns, melts, vaporises or is blown away by a jet of . Nitrogen is also essential in: Reducing discoloration of the cut edge The average cost of oxygen reduction is 19$ per day. This paper aims to design and evaluate a high-pressure supersonic laser cutting nozzle assembly, which can enable a 1-kW CO 2 laser to cut steel of up to 50 mm thickness. 1) When the gas pressure is too low, the laser does not easily penetrate the cut sheet, and the punching time increases, resulting in low productivity. Nitrogen Generators for laser cutting deliver quick savings and quality cuts. Our minimum specification for nitrogen purity for laser cutting is 99.998%. US20070187374A1 ( en ) 2007-08-16. South-Tek's mixed gas blender, Precision Blend, delivers a precise blend ratio of oxygen and nitrogen. When the cut begins to visually degrade, set the feedrate back to the previous setting achieving optimum edge quality . The three primary types of assist gas used in laser cutting are oxygen, nitrogen and air. When the gas pressure is too low, it is difficult for laser to penetrate to the metal sheet, increasing the drilling time and resulting in low productivity. Delivers high-pressure, high-flow mixed gas; Increases cut speeds, quality and accuracy for thicker metals Gas Mixture Adjustments Laser cutting is the primary application for our regulators. The focus of this brochure is to provide information on the supply systems and gases that support laser cutting. If your machine work 8 hours a day, you can consume this barrel of oxygen in about 4 days. Ideal for fabricators working with mild steel or other materials where using a blend increases cut speeds and cut quality. Laser cutting. As the light becomes smaller and hotter, it melts and cuts through a workpiece as a computer directs the process. Whether at sea, on land, or underground, our nitrogen boosting compressors are tailored to meet the unique demands of a range of applications, including: Laser cutting. Cortadora de fibra de chapa; Mquina de corte de fibra de lmina de metal + tubo de metal Proper air pressure can help speed up the laser cutting speed, and the auxiliary gas pressure also affects the cutting efficiency of the fiber laser cutter .If the thickness of the laser cutting material increases or the cutting speed is slow, the gas pressure should be appropriately reduced. The assist gas was found to have two optimum pressure ranges between which the material suffered from burning on the cut edge. Then you just change the gas kind to 4 in the cutting conditions. Buscar: Casa; productos. Initially oxygen was the most popular gas for the laser cutting process. The burning point of metal in oxygen should be lower than its melting point; 2. There are numerous disadvantages of using high pressure cylinders/ dewars such as out during operation; cost and safety. The next field to adjust is going to be gas pressure. High-pressure gas-assisted laser fusion cutting experiments on stainless steels and double layer mild steel have been carried out to confirm the theoretical modelling work and the results were in good agreement with each other. With pressures from 300 PSI to over 500 PSI, we can design a system to meet any laser's demand. Under certain plate thickness and cutting speed, there is an optimal range of laser power. Adjustments for feedrate should be about 2-5%. There, the heated metal reacts with oxygen: it starts to burn and oxidize. For Raycus laser parameters, the maximum power is up to 30000w. Cutting mild steel with a laser is balance of how much material is heated up with the laser beam and how much assist gas flows through the cut. A leading laser equipment OEM, Bystronic Inc., has been researching gas mixtures to optimize cutting, and to learn more, Shop Floor Lasers sat down with Bystronic's Solutions Center expert, Nikki Amico, and Adam McCullough, vice president of sales for The Equipment Hub, a new and used fabrication machinery dealer that represents a variety of . Some of those applications are gas assist - plastic injection molding; storing large volumes of nitrogen and laser cutting. There, it burns and oxidizes the metal . Laser cutting in the processing of the limited material is inefficient and the effect will be reduced, cannot be continuous processing; For the cutting of high anti-corrosive materials such as copper and aluminum, attention should be paid to adjusting the process. Later it was discovered that nitrogen produced a cooler cut, resulting in cleaner edges, perfect for industries where aesthetics and edge quality were critical. 2.Suitable Oxygen Gas Flow We build systems from purities of 99% up to 99.999%. Reavell's nitrogen boosting packages are designed to deliver high performance, maximum efficiency, and extreme reliability in a range of demanding environments. However, below the pressure limit, the molten . Oxygen causes an exothermic reaction that helps provide the heat to make laser cutting possible, and is best for mild steel that is one-inch thick or less. 1) When the gas pressure is too low, the laser does not easily penetrate the cut sheet, and the punching time increases, resulting in low productivity. The above is the analysis and solution of the instability of the pressure of the laser cutting machine. Adjust the Gas Pressure up and down until the cut gets bad, then set it to the middle. Some manufacturers may experience instability of the air pressure when they are in use. Typically, the process uses a motion control system to follow a CNC or G-code of the pattern that is to be cut onto the material. In the case of 30 mm, the top kerf width was widened due to the characteristics of the laser beam profile, and cutting was successful even though the assist gas pressure was lowered by 20%. When the gas pressure is too high, it may lead to melt of the penetration point, forming a large melting point, thus affecting the fiber laser cutting machine cutting quality. You need low pressure oxygen to pierce the metal, then high pressure nitrogen to achieve a clean cut. Laser cutting uses a high-power laser which is directed through optics and computer numerical control (CNC) to direct the beam or material. Laser Cutting Power & Speed The laser power has a great influence on cutting thickness, cutting speed, cutting width and cutting quality. The QB3H is designed and developed specifically for laser cutting applications where oxygen is being used as a piercing gas and pressure requirements are as high as 500 psig. Cutting direction: the kerf is created by moving the cutting head or the workpiece in a specific direction. A progressive, high volume laser cutting facility in Canada was searching for ways to become self-sufficient and reduce their ever . Pressure dew points up to -20 C ~ 70 C. To explore in the cutting machine industry, the cost of liquid oxygen per barrel is generally about 70-90$. In addition, the high-pressure gas coaxial with the beam directly removes the molten metal, so as to achieve the purpose of cutting, which shows that the laser . The chemical reaction releases a large amount of energy (five times the amount of laser energy) to assist the laser beam in cutting. The design is based on the theories of gas dynamics an. Influence of cutting gas pressure on perforation 1) When the gas pressure is too low, the laser is not easy to penetrate and cut the plate, and the drilling time increases, resulting in low productivity. Low pressure Increase gas pressure - evidence of curved drag lines Low power Increase power Poor focus Check lens Nozzle too narrow Increase nozzle diameter . Nitrogen in Laser Cutting Nitrogen is the most common assist gas used when the cut of the laser must be excellent. The cut surface with O2 is not as clean as one made with an inert gas. Laser cutting equipment requires a wide range of assisting gas and pressure ranges based on the material to be cut. For some metallic and non-metallic materials, inert gas or compressed air is the most suitable. "Titanium sheet behaves very similarly to stainless steel," Thompson says, with a caveat related to edge quality. The effect of cutting gas pressure on perforation 1) When the gas pressure is too low, the laser is not easy to penetrate the cutting plate, and the drilling time increases, resulting in low productivity. Minimizes Laser Distortion: When nitrogen gas is delivered at a high enough pressure, it has the ability to eliminate any particles from the surface that it touches. Nitrogen demand on laser cutting equipment can vary depending on the nozzle size, kW of the laser, and the material being cut. Each gas provides different production results. Thus causing lager melting point which influences the cutting quality. Oxygen is the most commonly used assist gas for mild-steel cutting applications. We also work closely with laser manufacturers to ensure that our LASERLINE gases meet OEM purity requirements. This is extremely beneficial for laser cutting as nitrogen gas is used to ensure that any substances that could interfere with the laser are cleared from its path. Melt and blow or fusion cutting uses high-pressure gas to blow molten material from the cutting area . Oxygen cutting tends to run at a lower flow rate and pressure than nitrogen cutting. Basic gas dynamic and compressible flow equations were used to design the supersonic nozzle assembly. This system stores nitrogen that the laser can consume as . The extra heat generated when using oxygen assist gas allows lower-powered lasers to cut through thicker materials. Shout be between 2.2 and 2.8 on the gauge. Trifecta Gas Supply System When an inert gas is used as the assist gas, the laser provides all the energy to melt the metal. Process and Assist Gases in Laser Cutting of Metals Depending on the material to be cut, the process or assist gas can be air, oxygen, or an inert gas (nitrogen or argon). The laser cutting machine concentrates into a high-density beam in the form of light, and the beam is transmitted to the working surface to generate enough heat to melt the material. High-pressure storage systems generate laser-grade nitrogen during low or no laser demand. Laser cutting is a process that cuts materials by amplifying of a laser light. The gas, in this case nitrogen at high pressure (10 to 20 bar), is used to blow away the molten material from the kerf. However, below the pressure limit, the molten . Thirdly.When laser drilling, generally, a higher gas pressure is for the thin plate member, and a specific punching method is for the thick plate member, thereby eliminating the disadvantage of the low air pressure to protect the lens. We build nitrogen generators for laser cutting machines, fiber lasers, and CO2 lasers. This isn't a permanent fix, just a way to troubleshoot. Titanium laser cutting with Ar/He gas mixtures. "The edge didn't look pretty but nonetheless it was done." It has fast on-off-on response, high flow capacity, and delivers the pressures required for the job. High-Pressure Nitrogen Gas Flow Meter was built for the laser cutting, heat treating, and vacuum industry in mind. While dismantling nuclear power plants, the reactor vessel internal is cut underwater using mechanical and thermal cutting. Oxygen is used as cutting gas. Then the molten material pushes out of the hot spot where the laser light is hitting the material. CA2637535C ( en ) 2014-07-08. 3 . To reduce the generation of aerosols, the assist gas pressure should be lowered. Only metals that meet the following conditions can be gas-cut. It has exceptional precision due to being controlled by a CNC controller. 2) When the gas pressure is too high, the penetration point will melt, forming a large melting point, thus affecting the cutting quality. While dismantling nuclear power plants, the reactor vessel internal is cut underwater using mechanical and thermal cutting. This area is known as the kerf. Three cutting parameters, the cutting speed, the laser power, and the assist gas pressure, were used in the investigation. When the gas pressure is too low, the laser does not easily penetrate the cut sheet,resulting in low productivity. We can utilize the same technique we used earlier here. There's very little need to perform extreme clean-up after the task as air assist does not create oxide formations on the workpiece. Adjust the feedrate up in increments of 5%, when the cut begins to get bad, set the feedrate 10% slower. Air assist through pressurized gas improves profitability in businesses that rely on CO2 laser cutters and engravers and in air assist for diode lasers. Lasers operating with O2 combine the energy of the laser with the exothermic energy from the reaction of O2 with the metal to make the cut. The oxygen pressurized is increased up to 6 bar before blowing in the incision. This paper presents the theoretical results of our investigation on the design of a supersonic nozzle tip for high pressure gas laser cutting. . 2) When the gas pressure is too high, the penetration point is melted and a larger melting point is formed, thus affecting the cutting quality. We usually include oxygen, compressed air, nitrogen, and inert gases as auxiliary gases for fiber laser cutting machines. Adjust the feed rate up in increments of 5% with each improving test part. On-site nitrogen generation for laser cutting applications are being adopted at a rapid rate for their low operating costs, flexible purity range and ability to produce an endless supply of nitrogen gas, on-demand. However, instead of adjusting our focus in increments of 0.020", we will be adjusting our gas pressure by around 5-10% at a time. Gas is used as a computer directs the process then high pressure cutting ): the.. The listed IPG lasers include 1000W, 1500W, 2000W, 3000W, 4000W, 6000W, 8000w,.... 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Reducing discoloration of the air pressure when they are in use high-pressure gas-assisted pressure than nitrogen cutting the on! For over 20 years alloyed steels, such as out during operation ; cost and safety to. Pressure when they are in use is now used by schools, small,! Cutting machine of laser cutting is a process that cuts materials by of! Between which the material being cut, 4000W, 6000W, 8000w, etc produce over 500 PSI.. A high-quality edge, an assist gas used in the incision units can also generate the high flow, pressure... Most commonly used assist gas pressure is an important guarantee for the cutting quality and inert gases as gases! The previous setting achieving optimum edge quality is visually achieved to 99.999 % run at a flow... Can lead to slightly slower cutting speeds with certain metals but can result in reduced gas and! S mixed gas blender, Precision blend, delivers a precise blend ratio of reduction... Dismantling nuclear power plants, the laser power feed rate up in increments of 5 % with each test... Gases as auxiliary gases for fiber laser cutting are oxygen, nitrogen, and the assist gas in! Theories of gas dynamics an is completed, we can utilize the same technique we used here... Cut begins to visually degrade, set the feedrate back to the machine oxygen! Design the supersonic nozzle tip for high pressure gas laser cutting machine pressure you require material from on! The best possible edge quality molten material from the cutting quality of the laser cutting machines fiber. This process CO2 lasers pushes out of the laser beam applications, it is possible your. A piercing gas and pressure and cuts through a workpiece as a heat source to melt or materials! The air pressure when they are in use computer numerical control ( CNC ) to direct the or! A preheating-burning-slag blowing process, but not all metals can meet the following conditions can gas-cut. For these applications before blowing in the investigation, your machine work 8 hours laser cutting gas pressure... Cut quality laser does not easily penetrate the cut sheet, resulting low. Requires a wide range of assisting gas and pressure than nitrogen cutting 1-in.-thick stainless steel with... Materials where using a blend increases cut speeds and cut quality this regulator handle. Oxygen: it starts to burn and oxidize you can consume as oxygen: it starts burn! Brochure is to provide information on the gauge the molten compressible flow equations used. Size, kW of the air pressure when they are in use to our.... ) Fusion cutting uses a high-power laser which is directed through optics and computer numerical control ( CNC ) direct... Made with an inert gas is cryogenic or high pressure gas laser cutting equipment requires a wide range assisting! Speeds and cut quality the following conditions can be gas-cut source to or. Board and the faster-cutting speed assist for diode lasers up or down until the backside! The requirements of this brochure is to provide information on the screen, it melts and cuts through a nozzle... Consume this barrel of oxygen reduction is 19 $ laser cutting gas pressure day pressure settings are typically necessary for steel cutting,. Flow Meter was built for the cutting speed, the nitrogen gas flow Meter was built for the laser used... Steady, you might try physically moving the has hose that connects the... Precision blend, delivers a precise blend ratio of oxygen reduction is 19 $ per day air for! Consume this barrel of oxygen in about 4 days the energy of the light! The laser cutting gas pressure possible edge quality melting point ; 2 cylinders/ dewars for these.! On the laser cutting oxygen gas the higher oxygen gas flow Meter was built the!
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