Improved lubrication if lubricating film is maintained. Explosive welding free download as powerpoint presentation. A punch in conventional forming is replaced by an explosive charge. Depending on the size and type of welding machine, various methods of developing the electrode force are used, but the most common is to use compressed air in a. Explosive forming can be utilized to form a wide variety of metals. Forging is a metal working process in which useful shape is obtained in solid state by hammering or pressing metal. High energy rate forming herf principleskey feature of herf. Sheet metal characteristics typical shearing operations, bending and drawing operations stretch forming operations formability of sheet metal test methods working principle and application of special forming processes hydro forming rubber pad forming metal spinning introduction to explosive forming, magnetic pulse forming. Manufacturing companies producing metals supply metals in form of ingots which are obtained by casting liquid metal into a square cross section.
Manufacturing technology high velocity forming free download as powerpoint presentation. How to download all of the lectures for a course in nptel. This is somewhat slower than the explosive forming process, similar to explosive forming in which an enormous amount of energy. Nptel mechanical engineering forming sheet metal operations. Introduction to explosions and explosion safety prof. Jun 04, 2018 explosive forming youtube, explosive forming nptel, explosive forming learn and grow, forming, metal forming high energy rate forming process ppt high energy rate forming process. Shock sensitive substances include acetylides, azides. Nptel mechanical engineering forming sheet metal operations other sheet. Feb 28, 2015 hi fellas, check out the ebook of manufacturing technology1 for mechanical,automobile and industrial production engineering students.
Explosive forming article about explosive forming by the. Analysis of water hammer forming on the sheet metal. Potentially explosive chemicals chemicals when subjected to heat, impact, or friction, undergoes rapid chemical change, evolving large volumes of gases which cause sudden increase in pressure. Explosive forming process high energy rate forming process. Since the forming of the metal occurs so quickly, desirable materials for herf will be ductile at high deformation speeds. High energy rate forming is the forming of sheet metal by a high energy surge, delivered over a very short time. Scribd is the worlds largest social reading and publishing site. What is the consideration of strain rate in explosive forming. At tnopml several of the explosive welding configurations that were. The ability to quickly prototype a unitized figure 4. Unlike other videos in this series, this video is not licensed under a creative commons license, due to restrictions required by the included images creatordistributor. Detonation of the explosive forces the workpiece to assume the shape of the tool. The temperature of work is increases due to adiabatic heating. This technology is labor intensive, but requires only singlesided tooling.
It can be use for large size of it can be only used for metal sheets. Herf high energy rate formingherf principles\key feature. Learn for free, pay a small fee for exam and get a certificate. Manufacturing technology1 lecture notes,ebook,pdf download.
Explosive forming is a metalworking technique in which an explosive charge is used instead of a punch or press. Multishot explosive forming is sometimes carried out automatically the charges are fed in from a special supply bunker. Pdf me6302 manufacturing technology i books, lecture. Explosive forming in explosive forming, controlled explosive reactions enable the forming in sheet metals and other metallic products, where the rate of.
Early patents relating to explosive forming appeared at the end of the 19th and at the beginning of the 20th century. Unitv unconventional forming processes, principle, working and applications of high energy forming processes such as explosive forming, electromagnetic forming, electrodischarge forming, water hammer forming, explosive compaction etc. Explosive forming for a good recent overview, the reader is referred to 1 is therefore explored to assess the potential of this essentially cold forming process, based on the idea that all. In explosive forming, we have discussed two different types of explosive forming. Physical principle of the effect of ultrasound on plastic deformation. Press brake forming, explosive forming, hydro forming, electro hydraulic forming, and magnetic pulse forming. How to download all of the lectures in pdf for a course in. Explosive forming, however, is not necessarily a replacement for conventional metal forming techniques.
Download me6302 manufacturing technology i books lecture notes syllabus part a 2 marks with answers me6302 manufacturing technology i important part b 16 marks questions, pdf books, question bank with answers key, me6302. An explosion may occur without an explosive, that is, without any material which contains intrinsically the energy needful to produce the explosion. Explosive welding or cladding is usually performed on relative thick plates by means of a large scale parallel plate setup. I will also share the lecture notes and other ebooks in pdf download format.
Manufacturing technology high velocity forming forging. Explosive forming is an ideal process for producing low volumes of very large metal part with low tooling costs. Explosively formed projectile encyclopedia article. Mar 25, 20 comparisonexplosive forming superplastic forming in explosive forming an in super plastic forming explosive charge is used punch or press is used to instead of a punch or press. Practically all metals, which are not used in cast form are reduced to some standard shapes for subsequent processing. High energy rate forming herf processes introduction. Forming nptel web course free ebook download as pdf file. Advanced forming processes electromagnetic forming, explosive forming, electrohydraulic forming, stretch forming, contour roll forming. Manufacturing processes i nptel online videos, courses.
The forming processes are affected by the rates of strain used. Nptel, an elearning initiative by the 7 indian institutes of technology and the indian institute of science with the support of the mhrd, govt. You can find them according to your branch and subject in the below link national mission on education through ict this was initiated by iit madras. So, you want to download all of the video lectures for a course in nptel. Explosive forming process high energy rate forming. Nptel, online courses and certification, learn for free. Electro hydraulic metal forming unconvential metal formingstudy with sudhanshussvgimchanicl engg. Nptel provides elearning through online web and video courses various streams. The limitation of these processes is the needfor skilled personnel. High velocity forming comparison with conventional forming. Applications and capabilities of explosive forming request pdf. This ebook, notes for the subject manufacturing technology1 covers the following. Email print pdf such as ocean engineering, biotechnology, mining and metallurgy. If you continue browsing the site, you agree to the use of cookies on this website.
It can be used on materials for which a press setup would be prohibitively large or require an unreasonably high pressure, and is generally much cheaper than building a large enough and sufficiently highpressure press. High velocity forming of metals and high energy rate forming. Let us first of all discuss the underwater explosion technique. Black powder, for example, may burn in the open air. Chapter i properties of explosives an explosive is a material. Sep 09, 2002 the required profile results from the explosive force that directly or indirectly deforms the metal.
Apr 07, 20 nptel was the brainchild proposal which was put forward by the five main iits national program in technology enhanced learning nptel. Tno is involved in development of the explosive forming technology for the fabrication of metal sheets and plates. Some examples of shapes obtained by forging process. Unconfined type explosive forming a gas bubble is also produced which expands spherically and then collapses. High velocity forming forging explosive material scribd. Metal forming processes full notes ebook free download pdf. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. Explosive forming is a broad term covering many process variations.
Mod1 lec12 high energy rate forming processes youtube. You will find all pdf s and also as mp3 file for all video lectures which are in nptel. Heat, light, mechanical shock and certain catalysts can initiate explosive reactions. On detonation of the explosive charge, a pressure pulse or a shock wave of very high intensity is produced. Rolling 99% content is from mechanical metallurgy dieter slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Sheet metal operations other sheet metal forming processes nptel. Explosive forming of a part may be carried out by using large charges in a single explosion socalled singleshot explosive forming or by using a series of small charges multishot explosive forming. Explosive forming can be used to easily produce difficulttomanufacture components. It is one of the oldest metalworking arts with its origin about some thousands of years back.
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