Presentations ppt, key, pdf logging in or signing up. Plasma arc welding is an arc welding process wherein coalescence is produced by the heat obtained from a constricted arc setup between a tungstenalloy tungsten electrode and the watercooled constricting nozzle nontransferred arc or between a tungstenalloy tungsten electrode and the job transferred arc. The fourth part of this course will deal with chemical and electrochemical type. This is 3phase bolted fault on the line side of a 400 a breaker. The welding power supply then maintains a low current arc inside the torch. A highvelocity jet flow of hot ionized gas melts the metal and then removes the molten material to form a kerf. When a flowing gas is heated to a sufficiently high temperature of the order of 16,500c to become partially ionised, it is known as plasma. Ionized orifice gas from the pilot arc is blown through the constricting tip orifice by a compressed gas. It allows for things to be conjoined that may have not been thought to be possible. With increase in competition in market and to attain high accuracy now a days the nonconventional machining are become lifeline of any industry. Ahw atomic hydrogen welding caw constricted arc welding tig tungsten inertgas arc welding mig metal inertgas arc welding mag metal activegas arc welding pjw plasma jet welding paw plasma arc welding pjpw plasma jet plasma arc welding gmgmma gasmixture shielded metal arc welding magm magc co2shielded metal arc welding ngw narrowgap welding. Plasma arc machining pam methods machining engineering. The basic principle of arc welding is shown in below fig. Plasma arc machining pam kcg college of technology.
Kinematics of machines nptel online videos, courses. Oct 15, 20 the energy of the plasma jet and thus the temperature is dependent upon the electrical power employed to create arc plasma. The term plasma, as employed in physics, means ionized particles. Welcome to this session on electron beam welding and plasma arc welding processes, under the course advanced manufacturing processes.
Plasma arc welding and machine seminar reportpdfppt download. Operations include hole piercing and cutting along a defined path. The plasma arc cutting process is illustrated in fig. This channel is formed by faculty from bit to enhance the knowledge of students towards technical and fundamentals plasma arc machining is used for variety of industrial application. Pam is a method of cutting metal with a plasma arc, or tungsten inertgas arc, torch. Plasma arc cutting optimization parameters for aluminum alloy with two thickness by using taguchi method conference paper pdf available july 2016 with 367 reads how we measure reads. Hydrogen, in its atomic state, is a strong reducing gas which prevents oxidation of weld metal and rapid burning of electrodes. Apr 21, 2015 introduction the plasma arc machining process was introduced to the industries in 1964 as a method of bringing better control to the arc welding process in lower current ranges. The arc cut pro series plasma table controller includes two extremely powerful plate nesting and cutting programs to give you all the tools needed to maximize productivity and efficiency.
Plasma arc machining machine tool technology britannica. Working a principle of wire cut electric discharge machining is same as that of electric discharge machining. A plasma arc operates on principles similar to an arcwelding machine, where an electrical arc is struck between two electrodes. Nov 05, 2017 this channel is formed by faculty from bit to enhance the knowledge of students towards technical and fundamentals this video explains plasma arc machining pam in details with explanation of all. Three black marbles are dropped at the same time into three different fluids oil, water. Plasmaarc machining pam employs a highvelocity jet of hightemperature gas to melt and displace material in its path called pam, this is a method of cutting metal with a plasmaarc, or tungsten inertgasarc, torch. The plasma arc process has always been seen as an alternative to the oxyfuel process. Introduction the plasma arc machining process was introduced to the. The focus on this project is to obtain an optimum condition setting to obtain maximum mrr and minimum the surface roughness sr. Scribd is the worlds largest social reading and publishing site. In a plasma torch, known as the gun or plasmatron, a volume of gas such as h2, n2, 02, etc. Welcome to the course on advanced machining processes.
Nptel materials electrical and electronic engineering. The plasma welding process was introduced to the welding industry in 1964 as a method of bringing better control to the arc welding process in lower current ranges. Experimental investigation of the plasma arc cutting process. A number of input parameters govern the electrical output and hence heating effect of the torch. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. Basically, plasma arc machining pam is a metal cutting process where metals are cut with plasma arc, tungsteninertgas arc or a torch. In this paper presented the work design optimization of plasma arc cutting machine. The principle of plasma arc machining is shown in the figure.
Plasma arc machining working principle best engineer youtube. Effect of constricting electric arc in plasma device. Early plasma cutters were large, slow, and expensive. Plasma arc machining pam and plasma arc welding paw. Department of mechanical engineering displacement, deformation, and strain displacement a vector that represents a movement of a point in a body due to applied loads with. The electrode and workpiece are immersed in a dielectric liquid, and a feed mechanism maintains a spark. Consequently, common applications for pac consisted of repeating cutting patterns in a massproduction mode. Machine tool machine tool electricaldischarge machining edm. Nptel syllabus marine construction and welding video course. As we give the power supply to the system, an electric arc develops between the cathodic tungsten electrode and an anodic nozzle. This article introduces the basic principles of plasma arc welding paw and provides a survey of the latest research and applications in the field. Plasma arc heating normally a transferred plasma arc is used for heating, requiring a return current path through the work. In arc welding process, an electric arc between an electrode and a workpiece or between two electrodes is utilized to weld base metals.
Welding is the most economical and efficient way of joining things together permanently. These methods form a group of processes which removes excess material by various. Easwari engineering college bharathi salai, ramapuram, chennai 600 089. Power system generation, transmission and distribution encapsulated from earlier video prof. Nontraditional processes ntp nontraditional cutting processes. This forms a low resistance path to ignite the main arc between the electrode and the workpiece figure 76. Its high accuracy, finishing, ability of machining any hard materials and to produce intricate shape increases its demand in market. The electric arc is formed between an electrode and the.
Edm is a controlled metal removal process that is used to remove metals by mean of electric spark erosion so it is also known as simply spark machining. Plasma arc machining pam plasma arc machining is a nontraditional thermal process. Plasma arc machining or laser beam machining is that which is the last point. It is vital to our economy and therefore vital information for all. Plasma arc machining process does high temperature and. Plasma arc machining process, diagram, application, advantages and disadvantages introduction. Pdf experimental investigation of the plasma arc cutting. Plasma arc welding paw is a process of joining of metals, produced by heating with a constricted arc between an electrode and the work piece transfer arc or the electrode and the constricting nozzle non transfer arc.
Plasma is defined as a gas that has been heated to a sufficiently high temperature to become partially ionized and therefore electrically conductive. Any oxygen present in the surrounding combines with hydrogen forming waterwhich is immediately converted into steam. A typical value of temperature obtained in a plasma jet torch may be of the order of 50,000f against about 10,000f in ordinary electric welding arc. Plasmaarc machining pam employs a highvelocity jet. Plasma arc machining pam pdf plasma arc machining pam employs a highvelocity jet of hightemperature gas to melt and displace material in its path. Edm involves the direction of highfrequency electrical spark discharges from a graphite or soft metal tool, which serves as an electrode, to disintegrate electrically conductive materials such as hardened steel or carbide. The basic arrangement for a plasma arc cutting torch, similar to the plasma arc welding torch, is shown in figure 1071. Nov 05, 2017 this channel is formed by faculty from bit to enhance the knowledge of students towards technical and fundamentals plasma arc machining is used for variety of industrial application. One of the most important non conventional machining methods is plasma arc machining.
On this channel you can get education and knowledge for general issues and topics. The torch produces a highvelocity jet of hightemperature ionized gas plasma that cuts by melting and displacing material from the workpiece. Plasma arc machining pam pdf plasma arc machining pam pdf plasma arc machining pam pdf download. Pdf plasma arc cutting optimization parameters for aluminum. Chapter 1 early plasma cutting the plasmaarc cutting process saw its first commercial application in the early 1960s. Check out our machine software demo video and click the link below to learn more. Processes of arc welding introduction welding is a powerful technological advance.
Advanced manufacturing processes amps plasma beam machining. Its high accuracy, finishing, ability of machining any hard materials and. Today we are going to discuss on plasma arc machining process. The highenergy arc creates high temperatures ranging from 3,000 degrees to 7,000 degrees celsius. Plasma arc machining free download as powerpoint presentation.
In this part of the series the process fundamentals are described with emphasis being placed on the operating features and the advantages of the many process variants. The focus on this project is to obtain an optimum condition. These include the arc current and voltage, nozzle diameter, argon gas flow rate and standoff distance. Plasma arc heating for hot machining sciencedirect. Mar, 2020 the plasma arc cutting process cuts metal by melting a section of metal with a constricted arc. Pac was initially employed to cut metals that are difficult to machine by conventional methods. In this process heat for machining is produced by convection from the high temperature plasma as well as due to direct electron bombardment. As the gas comes in contact with the plasma, there is a collision between the atoms of gas and electrons of an electric arc and as a result, we get an ionised gas. Plasma arc cutting process and equipment considerations. Plasma arc welding paw is an arc welding process similar to gas tungsten arc welding gtaw. Plasma arc machining process, diagram, advantages and. However, the basic elements involved in arc welding process are shown in the below fig. The topic for the thesis writing is the analysis of process parameters of plasma arc cutting using design of experiment techniques.
A person doesnt need to be a physicist or chemist to understand the plasma arc. Tech cadcam 2,3assistant professor 1,2department of mechanical engineering 3department of mechatronics engineering 1,2,3u v patel college of engineering, ganpat university, mehsana, gujarat, india. This article provides a study note on atomic hydrogen arc welding. Manufacturing processes i nptel online videos, courses. Introductiontothenxnastra nthermalanalysisusersguide thenxnastranthermalanalysisusersguidedescribestheheattransferspecificmaterialwithin. The paw process is compared to gas tungsten arc welding, its process characteristics are listed, the classification is made, and two modes of operation in paw, i. Plasma arc machining pam employs a highvelocity jet of high temperature gas to melt and displace material in its path. Cnc machining, or computer numerical control machining, utilizes tools that can be computer controlled such as lathes, mills, routers and grinders. Plasma arc machining process pdf 10 plasma arc machining.
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