Welding is a skill that needs to be developed over time, with a. Free guide how to do mig welding free guide on how to do mig welding using a mig welder metal inert gas. Noc welding of advanced high strength steels for automotive applications. Mig welding is the process of using electricity to melt and join pieces of metal together. Soil exploration lecture notes, notes, pdf free download, engineering notes, university notes, best pdf notes, semester, sem, year, for all, study material. Courses, robotic training courses, and welding school courses.
Our second course wldg1043 introduces the student to mig, tig, and fluxcored welding processes. Welding is initiated by an electric arc between a tungsten electrode and the metal to be joined. This book is written to serve the needs of under graduate students embarking introductory course in welding technology. One is the touch start, where carbon blockis used as scrap material. Discusses a wide variety of processes and materials from the viewpoint of their fundamental physical and chemical properties. Then, this is theshielded metal arc welding, which we have process discussed in the previous lectures. This section covers two classifications related to weld joints. York technical college is an accredited testing facility. 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 successful application of welding to produced sound weld joints, it is utmost important to understand the science and technology behind the welding. These are widely use for joining a verity of shapes and material. Mig welding is generally regarded as one of the easiest type of welding to learn. Extra filler metal can be added by using a separate filler rod.
Figure 32, shielded metal arc welding, also called stick welding, is the most common welding process. Pankaj biswas dept of mechanical engineering iit guwahati. Find materials for this course in the pages linked along the left. Control of manufacturing processes delivered by mit. Nptel syllabus welding engineering video course course outline welding is one most the most commonly used fabrication techniques. For more details on nptel visit nptel related courses. Tungsten inert gas welding tig all of the above processes require electricity to create the heat needed to weld metals. Tig welding with variable parameters are used to find out defects through radiographic testing. Provides the opportunity for advanced laboratory practice with emphasis on skills upgrading in all phases of welding.
For a deeper dive into the science and skill of welding, be sure to check out the welding class. They are mainly used to assemble many parts to make a system. The most common types of welding are resistance welding rw, oxyfuel gas welding ofw, and arc welding aw. Introduction to machine design, methodology, strength, rigidity, fracture, wear, and material considerations in design, use of standards, selection of materials and processes. Students will learn basic and advanced skills in arc, mig, and tig 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. So, the tig arc can be ignited by the three methods.
Principle of gas shield arc welding processes nptel. Tig welding uses tungsten, inert gas and weld rods to produce precise and attractive welds in steel and aluminum. Nptel provides elearning through online web and video courses various streams. Electrical, electronics and communications engineering. Even if you are not an instructables member, free pdf downloads of all our machine manuals are available here. 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.
Welding technology courses welding technology welding. Our first course wldg will introduce you to oxyacetylene and arc welding techniques. 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. M381 welding technology and inspection procedures aws d1. 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. This book is designed to meet the requirement of revised syllabus prescribed by the anna university. Difference between mig welding and tig welding tig vs mig anuniverse. Theory of machines institute of advanced studies in. Tig welding is a commonly used high quality welding process. Welding will be performed in multiple positions on plate steel and sheet metal. This circuit begins with the electric power source and includes the welding cables, an electrode holder, a workpiece connection, the workpiece.
Mod3 lec11 tungsten inert gas welding part1 youtube. Joining of materials joining includes welding, brazing, soldering, adhesive bonding of materials. Dwivedi,department of mechanical engineering,iit roorkee. Courses fundamental of welding science and technology. The acc welding technology department endeavors to maintain excellence throughout the many facets of welding technology. Lecture notes tribology mechanical engineering mit. Dwivedi, department of mechanical and industrial engineering,iit roorkee. Pdhonline course m564 10pdh welding technology quiz. The term mig is stand for metal inert gas welding and tig is stand for tungsten inert gas welding. The mission of nptel is to enhance the quality of engineering education in the country by providing free online courseware. Fundamental of welding science and technology prof. 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. Theories and practical application of fabrication and layout are also covered.
Sundaravalli, suchitra publications the book welding technology for engineering and technology studies. Learn for free, pay a small fee for exam and get a certificate. Acc welding department austin community college district. Fundamental of welding science and technology intro video. Welding engineering online course video lectures by iit. For the love of physics walter lewin may 16, 2011 duration. They produce permanent joint between the parts to be assembled.
When welding covers and other cosmetic parts, tig welding with a filler wire often delivers the best economy. Tig can be used to weld copper, titanium, even two dissimilar metals, and is handy for making tricky welds e. Experience gained from user contact and welding training of crewmembers showed that. A weld joint is the junction of the edges or surfaces of parts that have been joined by welding. 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. In tig welding an arc is formed between a non consumable tungsten. 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. It is required that you complete wldg, or obtain instructor approval to take this course.
Nptel, online courses and certification, learn for free. Courses assist in developing skills needed for structural and highpressured vessel welding and include technical skill proficiencies standardized by the american welding society. Tig welding method and application tig welding definition the designation tig comes from usa and is an abbreviation of tungsten inert gas. The electrode and the work are part of an electric circuit. Tig welding is one type of welding amongst a few choices you have mig, stick, oxyacetylene, etc. Shielded metal arc welding employs the heat of the arc to melt the base metal and the tip of a consumable covered electrode. Lecture notes on veer surendra sai university of technology. Students will take foundation courses in industrial safety, blueprint reading, shielded metal arc welding stick and gas tungsten arc welding tig.
Today we will discuss difference between mig and tig welding. Introduction to arc welding trident technical college. 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. Metal casting is a labour intensive process automation. Welding and joining processes materials science and. Your primary concern as a steelworker will be gas and arc welding, the difference being in. How to register register for all courses with a few simple steps. Metal casting processes indian institute of technology. Tig welding has become a popular choice of welding processes when high quality, precision welding is required.