Arc is generated between electrode to workpiece transferred arc, also known as plasma arc figure 1 b pam arc generated within the device torch and only the ionised gas is emitted nontranferred arc, also known as plasma jet figure 1 a pjm. 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. The main advantages of laser beam machining are ease of automation for complex cutting patterns, absence of tool wear and. Plasma arc machining pam employs a highvelocity jet of high temperature gas to melt and displace material in its path. Ion beams machining ibm is an important nonconventional manufacturing technology hellborg et al. Machine tool machine tool electricaldischarge machining edm. The topic for the thesis writing is the analysis of process parameters of plasma arc cutting using design of experiment techniques.
Introduction the plasma arc machining process was introduced to the. Building of machines, structures, or process equipment by cutting, shaping and. Technical and economic analysis of plasmaassisted waste. The metal shieldedgas welding is limited to the metal inertgas welding process. Our analysis showed that the capital costs of plasma.
The plasma welding consists only of the plasmaarc welding process which works with a transferred arc. Plasma cutting is a process that cuts through electrically conductive materials by means of an accelerated jet of hot plasma. Instead of diverging into open arc, the nozzle constricts arc into a small cross section. Manufacturing technology notes with pdf learn mechanical. In this process, the material is removed with the help of a high velocity travelling at half the speed of light, i. Its high accuracy, finishing, ability of machining any hard materials and to produce intricate shape increases its demand in market. Advanced machining processes video course course outline there is a need for machine tools and processes which can accurately and easily machine the most difficulttomachine.
Manufacturing technology i notes pdf details unit4. Me6302 manufacturing technologyi previous year question. Download nontraditional manufacturing processes by gary f. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. Called pam, this is a method of cutting metal with a plasmaarc, or tungsten inertgasarc, torch. In unconventional machining, a form of energy is used to remove unwanted material from.
Today we will learn about plasma arc welding principle, types, working, equipments, application, advantages and disadvantages with its diagram. The plasma arc cutting process cuts metal by melting a section of metal with a constricted arc. Analysis of process parameters of plasma arc cutting using design of experiment a thesis submitted in partial fulfillment for the requirement for the degree of master of technology in production engineering by vivek singh 207me209 under the guidance of dr. Machine tool electricaldischarge machining edm britannica. The plasma arc cutting process is illustrated in fig. 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. This will generate high heat energy and melts and vaporize metal from work piece. 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. Ion beam machining is generally a surface finishing process in which the material removal takes place by sputtering of ions.
Plasma arc cutting process and equipment considerations. Jun 10, 2017 electro chemical machining consists of following basic elements. Plasmaarc machining pam employs a highvelocity jet of hightemperature gas to melt and displace material in its path. Notes on electro chemical machining ecm me mechanical. The photographic view of plasma arc cutting machine is shown in fig. 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. Plasma arc machining working principle best engineer youtube.
Regarding protection from arc light, a similar shade number to tig at the same welding current level should be used in head or hand shield. Since no heat is applied on the materials, cut edges are clean. Plasma arc machining pam employs a highvelocity jet of hightemperature gas to melt and displace material in its path. Typical materials cut with a plasma torch include steel, stainless steel, aluminum, brass and copper, although other conductive metals may be cut as well. Me6302 manufacturing technologyi previous year question papers february 23, 2018 may 25, 2019 syed afrith b. So, in this presentation we will be talking about the principals and practices of the plasma arc welding process. 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. Study the effect of process parameters in plasma arc. Now, i am totally clear about plasma arc machining watching this video. The plasma arc process has always been seen as an alternative to the oxyfuel process. On this channel you can get education and knowledge for general issues and topics. A plasma arc cutting machine cutting the internal sections of a metal part.
Electrolysis is based on faraday laws of electrolysis which is stated as. In electro chemical machining an electrolyte acts as a current carrier. Technical and economic analysis of thermal plasma assisted wastetoenergy 3 little nox. The schematic diagram of plasma arc machining system is shown in fig. Plasma arc machining process, diagram, advantages and. The torch produces a high velocity jet of hightemperature ionized g. Plasma is defined as a gas that has been heated to a sufficiently high temperature to become partially ionized and therefore electrically conductive. Electron beam machining is same as laser beam machining process in which except laser, high speed electron beam impinges on work piece. Plasma arc machining pam kcg college of technology. Pdf experimental investigation of the plasma arc cutting. Plasma arc machining process, diagram, application, advantages and disadvantages introduction. Construction, working principle, applications, advantages, and disadvantages with pdf january 5, 2018. The torch produces a high velocity jet of hightemperature. In this article we will discuss about the meaning and characteristics of electron beam machining ebm in industries.
Chapter 1 early plasma cutting the plasmaarc cutting process saw its first commercial application in the early 1960s. Operations include hole piercing and cutting along a defined path. The plasma arc cutting on the plate is connected by computer numerical control cnc system which can reduce cutting time and improve accuracy. Chemical machining working principle, application, advantages. In this ebook you will find covering the both electrical discharge machining and electrochemical machining.
Department of mechanical and industrial engineering. This is known as gaseous chemical machining or hot chlorine machining and can be used for deburring of metal parts. Advanced machining processes by hassan abdelgaward elhofy. Chapter 1 early plasma cutting the plasma arc cutting process saw its first commercial application in the early 1960s. Cutting speed the speed depends on the thickness of the material to be machined. Other machining operations shaping and planing a singlepoint tool moves linearly relative to the work part shaping a tool moves planing a workpart moves broaching performed by a multipletooth cutting tool by moving linearly relative to the work in the direction of the tool axis. Advanced machining processes online course video lectures. Laser beam machining an overview sciencedirect topics.
So, this type of power source is typically useful in case of manual arc welding process. Electrical discharge machining edm is a wellknown machining. I study plasma engineering in iran and i have to say its a quiet fascinating major,however its a new one and it has to be known to the world. Lincoln electric automations pushpull system can remove this layer in a controlled manner, filter it and circulate the. Jain coordinating institute iit kanpur subtitles available unavailable lecture lecture lecture lecture lecture lecture lecture lecture lecture. Consequently, common applications for pac consisted of repeating cutting patterns in a massproduction mode.
Sheet metal processes,sheet metal characteristics,bending,types of bending operations,drawing,applications,special forming processes,hydromechanical formings,advantages,rubber pad forming,limitations. A highvelocity jet flow of hot ionized gas melts the metal and then removes the molten material to form a kerf. All aspects of mechanical, electrochemical and thermal processes are. E mechanical engineering, second year 3rd semester me6302 manufacturing technologyi previous year question papers for the regulation 20. All aspects of mechanical, electrochemical and thermal processes are comprehensively covered. Plasma arc machining system setup consists of different subsystems such as power supply unit, plasma gas and shielding gas supply unit, plasma torch, cooling unit and control unit. The machining medium is solid grains suspended in an abrasive slurry in the former,while a fluid is employed in the wjm process.
In electric discharge machining process an arc is produced when two currentcarrying wires are shortcircuited. The electrode and workpiece are immersed in a dielectric liquid, and a feed mechanism maintains a spark. Pac was initially employed to cut metals that are difficult to machine by conventional methods. 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. Water jet machining water jet cutting can reduce the costs and speed up the processes by eliminating or reducing expensive secondary machining process. During electrochemical machining process, the reactions take place at the electrodes i. Plasma arc machining pam plasma arc machining is a nontraditional thermal process. Scribd is the worlds largest social reading and publishing site. Nontraditional and hybrid machining processes by hassan abdelgaward elhofy book is a good reference for both nontraditional and hybrid machining processes. Plasma arc machining plasma is defined as the gas, which has been heated to a sufficiently high temperature to become ionized. Chemical machining for some special purposes can also be achieved by using a jet of reactive gas, e. The objective of this work is to study the effects of plasma arc cutting process parameters on hazheat affected zone and bevel angle for low carbon steel 1010 material with thickness 4 mm, which. Advanced manufacturing processes amps plasma beam machining.
Pam is used for cutting grooves in the hardened shaft. The focus on this project is to obtain an optimum condition setting to obtain maximum mrr and minimum the surface roughness sr. Artificial air plasma construction plasma arc welding. To provide and insight on advanced manufacturing processes. Mechanical machining ultrasonic machining usm and waterjet machining wjm are typical examples of single action, mechanical non traditional machining processes. Singh, balbir singh modern machining processes presents unconventional machining methods which are gradually commercial acceptance. Submerged arc welding machine sawdefinition, parts, working process, pdf. Called pam, this is a method of cutting metal with a plasma arc, or tungsten inertgas arc, torch. An unconventional machining process or nontraditional machining process is a special type of machining process in which there is no direct contact between the tool and the workpiece.
Advanced machining processes video course mechanical. Plasma arc welding process and carbon arc welding process these are the typical. National institute of technology warangal plasma arc machining presented by l suresh kumar mtech manufacturing engineering. 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. Plasma cutting is often used in fabrication shops, automotive repair and restoration, industrial construction, and. Laser beam machining is a thermal energybased advanced machining process in which material is removed by focusing the laser beam on the work surface at a constant distance to melt and vaporize the unwanted work material. With the unveiling of processes such as plasma arc or electrochemical erosion, the.
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. 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. Difference between planer and slotter machine, pdf june 3, 2018. The glass will be slightly darker than that used for mma welding at the same current level. Plasma arc machining free download as powerpoint presentation. Welcome to this session on electron beam welding and plasma arc welding processes. Plasma arc welding is a liquid state welding process in which the metal to metal joint forms in a molten state. 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.
Sharma, department of mechanical engineering, iit roorkee. Plasma arc machining pam methods machining engineering. Jain, department of mechanical engineering, iit kanpur. Eventually, the particulate may settle back to the floor. In this process heat for machining is produced by convection from the high temperature plasma as well as due to direct electron bombardment. Welding revo technologies and enterprisesan iso 9001. From aerospace applications to the manufacturing of energy systems and medical. It includes detailed information to gain insight into the manufacturing processes. K p maity professor, department of mechanical engineering. Oxyfuel cutting, plasma arc cutting, and carbon arc cutting.
Nov 19, 2016 plasma torch in pam, electric arc constricts from nozzle, generates basic plasma jet. Electron beam and plasma welding processes youtube. Mar 31, 2017 it is a nontraditional machining process in which no physical tool is used. May 12, 2017 ecm working is opposite to the electrochemical or galvanic coating or deposition process. Mar 11, 2016 in electric discharge machining process an arc is produced when two currentcarrying wires are shortcircuited. Plasma arc welding is a liquid state welding process in which, the metal to metal joint forms in molten state. Protective equipment for plasma welding is as described for tig in job knowledge for welders no 17. Plasma arc machining or laser beam machining is that which is the last point. These methods form a group of processes which removes excess material by various. Edm machining process is also known as spark erosion machining. This is a different process from electric discharge, electron beam, laser beam and plasma arc machining. In this paper presented the work design optimization of plasma arc cutting machine. This course on advanced machining processes is also known as. It includes detailed information to gain insight into the manufacturing processes which are new, unconventional and list out the the.
To learn about various unconventional machining processes, the various process parameters and their influence on performance and their applications. Machining centers machining center highly automated machine tool capable of performing multiple machining operations under cnc control. Plasma arc cutting process and applications for pipefitting. The term plasma, as employed in physics, means ionized particles. Automatic tool changer pallet shuttles automatic workpart positioning cnc turning center. The basic arrangement for a plasma arc cutting torch, similar to the plasma arc welding torch, is shown in figure 1071. Early plasma cutters were large, slow, and expensive. 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. Electrochemical machining ecm is a nontraditional machining process uses the principle of faraday to remove metal from the workpiece. Plasmaarc machining pam employs a highvelocity jet of high temperature gas to melt and displace material in its path. Pdf nontraditional manufacturing processes by gary f. Schematic diagram of plasma arc cutting 1 first of all, plasma arc torch nozzle is placed on the plate at some standoff distance where the cutting will be carried out as shown in figure 1. These hot ionized gases used to heat the work plates, and the joint is created due to fusion.
You know in all the welding related processes where a layer of the metal is deposited on this on to the surface. During this machining process, a small portion of metals is also eroded away, leaving a small cater. Emission of fume, nitrogen oxide and noise in plasma. 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. Fundamentals of arc welding processes, physics of arc, arc forces, arc blow, selection of power sources for different arc welding processes, principles of weld joint design, welding symbols, metallurgical aspects in welding of steel, heat flow in welding and its effect on the performance of weld. It is a nontraditional machining process in which no physical tool is used. Nptel provides elearning through online web and video courses various streams. Various type of plasma arc cutting in this process gases are heated and charged to plasma. Plasma beam machining pbm plasma beam devices are of 2 types. Nptel video lecture topic list created by linuxpert systems, chennai nptel video course mechanical engineering advanced machining processes subject coordinator prof. Unconventional machining processes introduction and. Introduction to machine design, methodology, strength, rigidity, fracture, wear, and material considerations in design, use of standards, selection of materials and processes. Ibm can be classified into two main categories, that is, largearea ion beam machining libm technology and focused ion beam machining.
89 408 874 416 1381 821 1326 985 1344 335 184 1256 378 142 1184 779 270 1423 1156 334 357 291 720 1540 183 340 1073 1306 332 58 37 1173 1244 1003 1417 498 182 76