Aristotle section i oxyfuel cutting introduction oxyfuel cutting is a family of cutting processes which heats the work metal to its kindling point, causing it to burn in a stream of oxygen. Cut charts the following cut charts show the consumable parts, cutting speeds and the gas and torch settings required for each process. The basic plasma arc cutting system consists of a power supply, an arc starting circuit and a torch. Oct 15, 20 plasma cutting is a process that is used to cut ferrous stainless steel, cast iron, pig steel, etc. Identify the different components of plasma arc cutting equipment and ppe. Pac is a thermal cutting process that uses a constricted jet of hightemperature plasma gas to melt and separate metal. Thus, unlike the oxyfuel process, the plasma process can be applied to cutting metals which form refractory oxides such as stainless steel, aluminium, cast iron and nonferrous alloys.
For example, osha requires the use of ppe when engineering and administrative controls are not feasible or effective. Enabling the operator to cut through very thick metals. Plasma arc welding plasma arc welding is the welding process utilizing heat generated by a constricted arc struck between a tungsten nonconsumable electrode and either the work piece transferred arc process or water cooled constricting nozzle nontransferred arc process. Cnc plasma cutting machine operational manual machinemfg. Process characteristics it is one of the faster cutting processes. Cea takes great pride in the ability to control machine production. This process was unique because it could do precision cutting on both thick and thin metal. Laser cutting is a highly accurate process, thanks to this high level of control that you are offered. Another very common thermal cutting technique is plasma arc cutting. The machine is built with the most rugged components to our highest specifications for unmatched reliability and consistency. Plasma arc cutting, also referred to as plasma fusion cutting or plasma cutting, is a fabrication process which employs superheated, ionized gas funneled through a plasma torch to heat, melt and, ultimately, cut electrically conductive material into.
Plasma cutting emerged from plasma welding in the1960s and developed into a very productive process for cutting sheet metal and plates in the 1980s. As the plasma strikes the workpieces surface, the workpiece material absorbs the thermal energy of the arc and plasma gas, increasing the internal energy and generating heat. The plasma arc cutting and gouging processes use plasma to transfer an electrical arc to the work piece. Mar, 2020 the plasma arc cutting process cuts metal by melting a section of metal with a constricted arc.
Personal protective equipment ppe for welding and cutting. Plasma cutting can be combined with waterjet or oxy fuel on the same. First of all, the most important differences from the similar machines are that the conventional plasma cutting generator hasnt been used and it has been equipped with precision plasma series ampere or 260 ampere precise cutting plasma generator, torch. The plasma arc is formed between a negatively charged electrode inside the torch and a positively charged workpiece. The quality of the cut has been monitored by measuring the kerf taper angle. After unpacking the plasma cutting machine, put the plasma power in the left middle position with the mat board under it, control cabinet mounted on plasma cutting machine on the left side of the front position so that the operator can watch the whole desktop plasma cutting machine and cutting process.
Plasma cutting is a process that cuts through electrically conductive materials by means of an. Plasma cutting is a process in which electrically conductive materials are cut through by means of an accelerated jet of hot plasma. The numbers shown in the cut charts are recommended to provide highquality cuts with minimal dross. Pdf plasma cutting of composite materials researchgate. The plasma cutting process, as used in the cutting of electrically conductive metals, utilizes this electrically conductive gas to transfer energy from an electrical power source through a plasma cutter torch to the material being cut. The oxyfuel gas cutting process creates a chemical reaction of oxygen with the base metal at elevated temperatures to sever the. Cnc cutting machine process hornet cutting systems. In modern steelage the steelmakers cut iron and steel by oxyacetylene, oxyhydrogen, oxy propane, oxynatural gas cutting blowpipes easily, speedily, and cleanly. Pdf cnc metal cutting machine using plasma arc mohammed. In this process, a specialized nozzle design narrows the arc and increases energy density. The different processes included in the plasma cutting process are plasma material interaction, process control, thermal plasma generation, liquid metal removal, etc. The metal to be cut or removed is melted by the heat of.
Plasma cutting is a process that cuts through electrically conductive materials by means of an accelerated jet of hot plasma. Plasma welding 17 welding sheet 18 welding plate 20 welding pipes 22 defects in welds 24 the right gas. Plasma cutting is a process that is used to cut ferrous stainless steel, cast iron, pig steel, etc. First make the drawing in autocad, then import the. The same reason you use oxygen in an acetylene torch the oxygen in the plasma stream reacts with mild steel. The high velocity ionized gas, that is, the plasma, conducts electricity from the torch of the plasma cutter to the work piece. Plasma welding is found to have advantages over other welding. Oxyfuel cutting is a costeffective method of plate edge preparation for bevel and groove welding. Chapter 10 cutting processes practice is the best of all instruction. Theory and practice it is designed for welding instructors at both the high school and college level, union and military trainers, inhouse training departments, welding and cutting distributors who want to offer valueadded customer training, and advisors to student organizations such as future farmers of america and. When it comes to plasma cutting for home hobby, motorsports, art and diy projects, using the right techniques will make the job easier and improve results. In simplest terms, plasma cutting is a process that uses a high velocity jet of ionized gas that is delivered from a constricting orifice. Emission of fume, nitrogen oxide and noise in plasma. Plasma processes of cutting and welding semantic scholar.
This machine is built for all day production and is capable of running any of our hd plasma cutters. Describe the plasma arc cutting process and its applications in the pipefitting trade identify the different components of plasma arc cutting equipment and ppe required for its use list the characteristics and hazards associated with plasma cutting safely set up the equipment, adjust air pressure and current to correct. Its major difference of process details with edm process details are described below. The use of ppe is a good safe practice and may be required by regulatory agencies. Pdf the plasma arc cutting process severs metal by using a constricted arc to melt a localized area of a workpiece, removing the molten.
Jul 24, 2017 the the plasma arc welding paw and cutting process was invented by robert m. Basic tips to improve plasma cutting performance print article july 1, 2009. Thermal cutting processes manual plasma arc cutting pac. On this channel you can get education and knowledge for general issues and topics. Step by step nesting process with easy to use interface. Islamic university of gaza faculty of engineering department of electrical engineering cnc metal cutting machine using plasma arc by mohammed j. In the process of plasma cutting, a transferred electric arc is established between the negative electrode and the work piece within the cutting torch.
Jul 01, 2009 when it comes to plasma cutting for home hobby, motorsports, art and diy projects, using the right techniques will make the job easier and improve results. These materials can be cut economically, and the setup is quick and simple. A highvelocity jet flow of hot ionized gas melts the metal and then removes the molten material to form a kerf. The basic arrangement for a plasma arc cutting torch, similar to the plasma arc welding torch, is shown in figure 1071. This process is based on an electrical arc between an electrode inside a torch and the workpiece. The the plasma arc welding paw and cutting process was invented by robert m. Nontraditional processes ntp nontraditional cutting. We specialise in cnc plasma tables and plasma cutting machines. Common terms for these processes are flame cutting, oxygen cutting, and burning. Plasma arc cutting is the process in which the metal is cut by melting a localized area with a constricted arc and removing the molten material with a high velocity jet of hot, ionized gas.
This cutting format uses a plasma stream to transfer energy to a conductive work material. Jul 18, 2006 learn how plasma cutting works in this short clip. The gas flow consists of active or inert gases or gas mixtures. A plasma cutting machine is provided in which a dross adhesion inhibitor is jetted from a plasma torch toward the cutting start position piercing position of the object material. The process of cutting metal with a plasma arc cutting tool is investigated and discussed. Tool wear is zero since the process is a non contact cutting process. To properly explain how a plasma cutter works, we must begin by answering the. The plasma cutting process is investigated experimentally in the present paper for assessing the quality of the cut.
Because of the higher arc energy, high definition plasma achieves superior cut quality on materials up to 50 mm 2 with superior cut edge angularity, narrower kerf and higher cut speeds than conventional plasma cutting technology. Plasma cutting can be use for precision cutting on gauge material up to 6 thick stainless. Cnc plasma cutting machines, cnc oxyfuel cutting machines and cnc waterjet cutting machines. Typical materials cut with a plasma torch include steel, stainless steel, aluminum, brass and copper, although other conductive metals may be cut as well. Emission of fume, nitrogen oxide and noise in plasma cutting. It can be used to easily cut rusty and scaled plates and only requires moderate skill to produce successful results.
The plasma heats the workpiece, melting the material. A gas such as argon, nitrogen, hydrogen or air is injected into the arc inside the torch, turning it into a plasma with a temperature of more than 10. To understand plasma arc gouging better, its helpful to understand plasma arc cutting pac. The results of the experimental research of plasma cutting process were presented in this paper. Plasma cutting can be combined with waterjet or oxy fuel on the same part. Plasma cutting function, advantages and disadvantages. When it comes to plasma cutting for home hobby, motorsports, art and diy projects, using the right techniques. It can be used in many applications, including stack and shape cutting. The tip of the torch holds the constricting nozzle. Since the plasma arc cutting process is capable of handheld or machine torch cutting, metals ranging from thin gauge aluminum to 1 12inch carbon or stainless steel can be plasma cut. Functions of gas in plasma arc cutting plasma gas is also called the cutting gas. The impact analysis of the input process parameters. Basic tips to improve plasma cutting performance millerwelds. Plasma arc cutting an overview sciencedirect topics.
Describe the plasma arc cutting process and its applications in the pipefitting trade. The work piece does not need clamping but workholdingis advisable to avoid shifting with the table acceleration and for locating when using a cnc program tool wear is zero since the process is a non contact cutting process. The arc is constricted between the electrode and the material to be cut, due to the gas flow used, causing the energy flow density and the temperature of the plasma jet to rise even further. Normal process of cnc plasma cutting machine youtube. Cnc plasma cutters have also become reasonably priced, so. In the past, process control was the responsibility of the. Cuts can be made in any direction polarization may affect process. Numerical modeling of the metal cutting process in the plasma. Cnc control of the plasma cutting process the value of plasma cut charts. Systemic approach is used to analyze the work conditions input, disturbing and output factors. Cutting of metals by means of flame has many advantages over other methods, specially when the metal is of irregular shape. Mar 17, 2017 general plasma cutting machine operation.
Plasma cutting is the fastest cutting process on carbon steel, aluminum, or stainless steel. This is the gas that is ionised in the plasma process and exits through the nozzle orifice. It is also capable of spray coating hardening metal on other metals. The swift cut range is making inhouse cutting a possibility with affordable, quality built, uk designed and engineered machinery with industry leading, accessible software and hypertherm consumables. Especially during the cutting process, when the torch and nozzle of the plasma cutting machine have problems, it will cause obvious defects to the plate. The plasma arc cutting process employs a meltandblow cutting method, which heats, melts and vaporizes a localized area of the workpiece. Welding revo technologies and enterprisesan iso 9001. The torch holds the consumable electrode in a recessed chamber where gas is heated to plasma. Once you incorporate a cnc cutting method with plasma cutting tools you can then automate the process of cutting, giving you increased accuracy and repeatability. Cutting laser cutting is able to cut faster and with a higher quality then competing processes. However, as with any piece of equipment you need to know how and why it does what it does and the necessary precautions to do the job safely. Tool details the tool used in wcedm process is a small diameter wire as the electrode to cut narrow kerf in the workpiece. Typical materials that can be cut with a plasma torch are steel, stainless steel, aluminium, brass, copper and other conductive metals. Plasma arc cutting process and equipment considerations.
How the laser cutting process works spi lasers overview. Swiftcut plasma cnc tables use the latest technology and manufacturing processes. Focus is on the metal cutting process at the inside surface of the kerf. Plasma arc welding process principle, main parts, working. This is an important region that is not well documented due to the difficulty of experiments and the complexity of computation needed to characterize this process. Esab invented plasma cutting in 1955, and weve never. Easy to learn, easy to use the swift cut range is the smart solution to all your cutting requirements. The laser cutting machine does not damage the workpiece, while the plasma cutting machine has damage to the plate.
Pdf experimental investigation of the plasma arc cutting. Plasma cutting can be utilized in large production facilities or by hobbyists at home, making its application quite varied across the board. Operating instructions and parts manual plasma cutter. Do not breathe in fumes emitted by the plasma cutting process. That chemical reaction between the oxygen in the plasma gas and the base metal helps to speed up the cutting process and improve the edge quality. The intense heat produced by this reaction sustains the cutting process and the production of the cut.
Common oxyfuel cutting applications are limited to carbon and low alloy steel. Cnc plasma cutting machines, cnc oxyfuel cutting machines and cnc waterjet cutting. As such, a cnc cutting machine also called a burn table makes use of cnc processes to cut materials of all kinds including steel, aluminum and wood. The plasma arc cutting process severs metal by using a constricted arc to melt a localized area of a workpiece, removing the molten material with a highvelocity jet of ionized gas issuing from. Power source the power source required for the plasma arc process must have a. Power source the power source required for the plasma arc process must have a drooping characteristic and a high voltage. Results of research concerning plasma cutting process of. The first part of this article and associated video dives right into the basic mechanics of good plasma cutting. The early plasma cutters were large, slow and expensive. A plasma cutter will use this electrically conductive gas to transfer energy from a power supply to any conductive material, resulting in a cleaner, faster cutting process than with oxyfuel. Cnc plasma cutter machines perfect for sheet metal.
The famed moviecar builder explains how to use a plasma cutter for custom metal fabrication. Operating instructions and parts manual plasma cutter description the plasma 375 is an igbt inverter plasma cutter with thermal overload protection, a trafimet torch and a builtin. Plasma is a gaseous mixture of positive ions, electrons and neutral. Plasma cutting is a process that is used to cut steel and other metals or sometimes other materials using a plasma torch.
Hornet cutting systems has three core cnc cutting processes. Migmag welding 30 flux cored electrodes 33 tig welding 34 oxyfuel gas cutting 37 plasma cutting 44 safety always 46 conversion data inside back cover air products welders handbook. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The plasma arc cutting process cuts metal by melting a section of metal with a constricted arc.
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