This book is designed to meet the requirement of revised syllabus prescribed by the anna university. Topics covered in this course include fundamentals of metal joining technologies, fusion based processes, solidliquid joining processes, solid state joining processes, adhesive joining, metallurgical aspects of welding, and. As contrasted to the additivejoining processes covered in the course manufacturing processes 1viz. The course takes us through the fundamentals of different machining processes, and optimization of a chain of processes through which a part undergoes. No week module name 1 1 fundamentals of welding and joining 2 2 laser and electron beam welding 3 3 solid state welding processes 4 4 computational welding mechanics 5 5 microjoining and nanojoining 6 6 welding metallurgy. Laser beam machining laser beam machining is a thermal materialremoval process that utilizes a high energy, coherent light beam to melt and vaporize particles on the surface of metallic and non metallic work pieces. Advances in welding and joining technologies nptel.
Sharma, department of mechanical engineering, iit roorkee. Soil exploration lecture notes, notes, pdf free download, engineering notes, university notes, best pdf notes, semester, sem, year, for all, study material. How laser beam welding works laser beam welding process. Electron beam and plasma welding processes youtube.
Also, this book can serve as a useful reference for academics, laser researchers, mechanical, manufacturing, materials or physics engineers, or professionals in any related modern. Advances in welding and joining technologies usb media storage type. Process solid state welding processes friction welding process electron beam and plasma welding processes laser beam welding and diffusion welding process high energy rate forming processes. This includes, physics of electric arcplasma, engineering the arcplasma for welding, metal transfer and mass flow in the weld pool, laser electron beam material interactions, pressure and force.
As metengr noted, the associated specifications used for qualifying a laser welding procedure can vary between industries and applications. Advanced manufacturing process for micro system fabrication. Lecture 11 introduction to laser beam welding part i lecture 12 introduction to laser beam welding part ii lecture principles of gas metal arc welding part i lecture 14 principles of gas metal arc welding part ii lecture 15 welding metallurgy of advanced high strength steels part i. Laser beam welding and diffusion welding process video. Tech sem i engineering physics uii chapter 2 laser. In this study, a detailed investigation was performed to quantify the. It can be is used for increasing speed and efficiency of computer. It is intended to cover common applications of the process. Laser beam machining lbm is a non conventional machining manufacturing process, a form of machining, in which a laser is directed towards the work piece for machining.
Shantanu bhattacharya,department of mechanical engineering,iit kanpur. Ramesh singh laser welding basics laser welding is a noncontact process that requires access to the weld zone from one side of the parts being welded the weld is formed as the intense laser light rapidly heats the materialtypically calculated in milliseconds. Spontaneous and stimulated emissions, laser action, characteristics of laser beam concepts of coherence, hene and semiconductor lasers simple ideas, applications. Basics of fixturing and metrology are also covered in this course. Laterally supported and unsupported beams, builtup beams. Electron beam welding demonstration, july 2017 duration. Discusses a wide variety of processes and materials from the viewpoint of their fundamental physical and chemical properties.
It can be used for measuring velocity of light, to study spectrum of matters, to study raman effect. Previous studies demonstrated use of dual beam laser processing can delay humping onset to higher speeds and slow down cooling rates. An introduction to laser beam welding twi training. Limit states design concepts, loads on structures, bearing and friction type of bolts, welding, concentric and eccentric connections. Electron beam and plasma welding processes laser beam welding and diffusion welding process high energy rate forming processes rapid prototyping technology rpt rapid manufacturing, applications and advancements. Metal inert gas mig and metal active gas mag welding are gas metal arc welding gmaw processes that use heat created from a dc electric arc between a consumable metal electrode and a workpiece which melt together to create a weld pool that fuses to form a join. This book can be used as a research book for a final undergraduate engineering course or as a subject on lasers in manufacturing at the postgraduate level. The high frequency of monochromatic light will fall on the surface then heating, melting and vaporizing of the material take place due. Welding and joining processes materials science and. Laser beam welding can be used for welding of corrosion resistant steels and titanium alloys requiring high quality welds. It is a gas laser built by ali javan at mit, with a wavelength of 632. This process can be split into two types, resistance spot welding and resistance seam welding. Laser beam welding can be performed in air rather than in a vacuum such as with electron beam joining.
In this machining process metal is removed by melting and vaporization of metal particle from surface of work piece. Mechanical engineering n p t e l national programme on. Sundaravalli, suchitra publications the book welding technology for engineering and technology studies. Laser beam machining used light energy from a laser to remove material by vaporization and ablation energy is concentrated optically laser emits either continuous or pulsed light beam 5 source. Engineering physics phy1 common for all branches unit. Advanced manufacturing process for micro sytem fabrication by dr. Comparison of plasma and laser beam welding of steel. Laser beam is used to measure distances of sun, moon, stars and satellites very accurately.
Certain arc and oxyfuel processes are also used for cutting metals. Micro usm and advances in usm tutorial of advanced manufacturing processes course by prof a. Currently it is finding wide use in communication engineering application where very fine wires are required to be welded and on micro circuit boards etc. Comparison of plasma and laser beam welding of steel sheets treated by nitrooxidation 198 quality and good consistency 3, 9. Now with fss fiber laser welding systems you have all of the benefits of the traditional yag laser welding. This book is written to serve the needs of under graduate students embarking introductory course in welding technology.
Engineering, management and supervisory staff who need to understand the basic principles of laser material processes, with a focus on laser beam welding of metal and plastic. Electron beam and plasma welding processes lecture 35 laser beam welding and diffusion welding processes lecture 36 high energy rate forming processes lecture 37 rapid. Laser beam is a beam of light, coherent and strictly monochromatic intense power of the beam with a small crosssectional area enables welding to be performed over small area. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. This is a fast process which is commonly used in the automotive industry. Me 338 manufacturing processes ii department academic. On this channel you can get education and knowledge for general issues and topics. Laser beam welding and diffusion welding process tutorial of advanced manufacturing processes course by prof a.
Gmaw welding, resistance welding and thermit welding. This course talks about the manufacturing process and how the joining processes are related with the manufacturing. Welding process heat density wcm2 temperature 0c 1 gas welding 102 103 25003500 2 shielded meta arc welding 104 6000 gas metal arc welding 105 80000 3 plasma arc welding 106 1500030000 4 electron beam welding 107 108 20,00030000 5 laser beam welding 108 30,000. This process uses thermal energy to remove material from metallic or nonmetallic surfaces. Advanced manufacturing processes free video lectures. Lbm is particularly suitable for making accurately placed holes. Today we will learn about laser beam machining principle, working, equipments, application, advantages and disadvantages with its diagram. Nptel syllabus advanced manufacturing processes web course course outline the course covers the details of the advanced machining theory and practices, advanced machining processes, advanced metal forming processes, advanced welding processes and advanced foundry processes. In recent years, laser beam welding using two laser beams, or dual beam laser welding, has become an emerging welding technique. Laser beam machining is a thermal machining process which uses laser beam to produce heat. Nptel video course mechanical engineering advanced finite elements analysis subject coordinator dr. This course is presented in a lucid and simplified way to make it enjoyable to the beginners. Dwivedi,department of mechanical engineering,iit roorkee. Nptel provides elearning through online web and video courses various streams.
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