In tig welding an arc is formed between a non consumable tungsten. Noc welding of advanced high strength steels for automotive applications. Nptel syllabus welding engineering video course course outline welding is one most the most commonly used fabrication techniques. How to register register for all courses with a few simple steps. Dwivedi,department of mechanical engineering,iit roorkee. For more details on nptel visit nptel related courses. When welding covers and other cosmetic parts, tig welding with a filler wire often delivers the best economy. This section covers two classifications related to weld joints. Nptel provides elearning through online web and video courses various streams. Fundamental of welding science and technology intro video.
Welding engineering online course video lectures by iit. Introduction to welding from the industrial revolution to. Lecture notes tribology mechanical engineering mit. For successful application of welding to produced sound weld joints, it is utmost important to understand the science and technology behind the welding. Tungsten also called wolfram is a metal with a fusion point of more than 3300oc, which means more than double the fusion point of the metals which are usually welded. Tig welding tig welding gas tungsten arc welding gtaw is frequently referred to as tig welding. This book is designed to meet the requirement of revised syllabus prescribed by the anna university. Sundaravalli, suchitra publications the book welding technology for engineering and technology studies. The most common types of welding are resistance welding rw, oxyfuel gas welding ofw, and arc welding aw. These are widely use for joining a verity of shapes and material. Introduction to machine design, methodology, strength, rigidity, fracture, wear, and material considerations in design, use of standards, selection of materials and processes.
The arc melts the metal, whilst shrouding it in a cloud of argon, helium gas or carbon dioxide, to shield the weld from contaminants in the atmosphere. Theory of machines institute of advanced studies in. A weld joint is the junction of the edges or surfaces of parts that have been joined by welding. Theories and practical application of fabrication and layout are also covered. Acc welding department austin community college district. Tungsten also called wolfram is a metal with a fusion point of more than 3300oc, which means more than double the fusion point of. Nptel, online courses and certification, learn for free.
Shielded metal arc welding employs the heat of the arc to melt the base metal and the tip of a consumable covered electrode. The purpose of the welding handbook for maritime welders is to provide guidance in modern welding and related processes and to provide the welder with a source of practical information on the right solution to specific onboard welding problems. For the love of physics walter lewin may 16, 2011 duration. The electrode and the work are part of an electric circuit. Find materials for this course in the pages linked along the left. Today we will discuss difference between mig and tig welding. So, the tig arc can be ignited by the three methods. Mod3 lec11 tungsten inert gas welding part1 youtube. This book is written to serve the needs of under graduate students embarking introductory course in welding technology. Discusses a wide variety of processes and materials from the viewpoint of their fundamental physical and chemical properties. Guide to tig welding this is a free basic guide on how to do tig welding using a tig welder tungsten inert gas tig welding is a skill that needs to be developed over time, with a piece of metal in front of you and with a welding torch in your hands. Tig welding uses tungsten, inert gas and weld rods to produce precise and attractive welds in steel and aluminum. Tig welding is one type of welding amongst a few choices you have mig, stick, oxyacetylene, etc. In the first phase of the nptel project, iitg has developed 05 video courses and 15 web courses and in the second phase, iitg has developed 16 video courses and 64 web courses.
Metal casting is a labour intensive process automation. Tig welding has become a popular choice of welding processes when high quality, precision welding is required. Welding will be performed in multiple positions on plate steel and sheet metal. Tig welding is a commonly used high quality welding process. Tig welding method and application tig welding definition the designation tig comes from usa and is an abbreviation of tungsten inert gas.
The mission of nptel is to enhance the quality of engineering education in the country by providing free online courseware. Introduction to arc welding trident technical college. Students will learn basic and advanced skills in arc, mig, and tig welding. As such, the content that is taught in the welding program at york technical college is based upon the studies and recommended practices of the american welding society and other welding authorities. For welding corners on a frame or similar component, mig welding is structurally sound and the surface can be readily ground to produce an acceptable surface for painting or other finishing. Electrical, electronics and communications engineering. Tungsten inert gas welding tig all of the above processes require electricity to create the heat needed to weld metals. Principle of gas shield arc welding processes nptel. Experience gained from user contact and welding training of crewmembers showed that. Tig welding is a skill that needs to be developed over time, with a piece of metal in front of you and with a welding torch in your hands. Control of manufacturing processes delivered by mit. Free guide how to do mig welding free guide on how to do mig welding using a mig welder metal inert gas. 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 metalarc welding magm magc co2shielded metalarc welding ngw narrowgap welding.
Provides the opportunity for advanced laboratory practice with emphasis on skills upgrading in all phases of welding. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. Tig welding stainless steel walking the cup vs tig finger duration. Joining of materials joining includes welding, brazing, soldering, adhesive bonding of materials. They cannot be separated easily by application of forces. Courses, robotic training courses, and welding school courses. Lecture notes on veer surendra sai university of technology. Welding technology courses welding technology welding. Students will take foundation courses in industrial safety, blueprint reading, shielded metal arc welding stick and gas tungsten arc welding tig. One is the touch start, where carbon blockis used as scrap material. Learn for free, pay a small fee for exam and get a certificate.
Tig welding practice without a welding machine tig time duration. Welding and joining processes materials science and. This circuit begins with the electric power source and includes the welding cables, an electrode holder, a workpiece connection, the workpiece. Courses assist in developing skills needed for structural and highpressured vessel welding and include technical skill proficiencies standardized by the american welding society. Tig can be used to weld copper, titanium, even two dissimilar metals, and is handy for making tricky welds e. Then, this is theshielded metal arc welding, which we have process discussed in the previous lectures. Soil exploration lecture notes, notes, pdf free download, engineering notes, university notes, best pdf notes, semester, sem, year, for all, study material. For a deeper dive into the science and skill of welding, be sure to check out the welding class. Pdhonline course m564 10pdh welding technology quiz. Mig welding is the process of using electricity to melt and join pieces of metal together. Pankaj biswas dept of mechanical engineering iit guwahati. Fundamental of welding science and technology prof. To meet the needs of these everexpanding disciplines, we offer a number of flexible formats offered through individual courses, specialty certificates, and even comprehensive college degrees.
Metal casting processes indian institute of technology. Process details, shielding gases, electrode wires, their sizes, and welding current ranges. The main difference between all of these processes is the way the filler metal is added and how the weld is shielded from the air. The term mig is stand for metal inert gas welding and tig is stand for tungsten inert gas welding. Our first course wldg will introduce you to oxyacetylene and arc welding techniques. They produce permanent joint between the parts to be assembled. Extra filler metal can be added by using a separate filler rod. Our second course wldg1043 introduces the student to mig, tig, and fluxcored welding processes. Tig welding with variable parameters are used to find out defects through radiographic testing. Dwivedi, department of mechanical and industrial engineering,iit roorkee.
It is required that you complete wldg, or obtain instructor approval to take this course. Your primary concern as a steelworker will be gas and arc welding, the difference being in. Mig welding is generally regarded as one of the easiest type of welding to learn. Welding produces a solid connection between two pieces, called a weld joint. Welding is initiated by an electric arc between a tungsten electrode and the metal to be joined. Courses fundamental of welding science and technology. Even if you are not an instructables member, free pdf downloads of all our machine manuals are available here. Welding is a skill that needs to be developed over time, with a. Difference between mig welding and tig welding tig vs mig anuniverse.
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