Lower and higher pairs, degrees of freedom, various types of mechanisms, their inversions and. Chemical spills the following actions must be taken in the event of a chemical spill. Detonating a charge above the plate rapidly forces the metal into the desired shape. Standoff or unconfined or underwater bulk head forming, free forming and cylinder forming explosive forming.
In confined spaces, burning may lead to detonation. Explosive forming article about explosive forming by the. There are two type of techniques of high explosive forming. Production engineering program program educational objectives impart knowledge to students in the latest technological topics on production and industrial engineering and to provide them with opportunities in taking up. Lecture series on manufacturing processes i by prof. So, you want to download all of the video lectures for a course in nptel. E mechanical engineering, second year 3rd semester me6302 manufacturing technologyi previous year question papers for the regulation 20. Explosive forming process high energy rate forming. Explosive forming is a process in which forces produced by an explosion are used to shape a workpiece.
Study material from nptel civil engineering department. Program educational objectives and program outcomes m. For free running explosives, the density is often specified as the pounds of explosives per foot of charge length in a given size borehole. At the same time, the tip of electrode melts, and metal droplets are projected into the weld pool. Applications and capabilities of explosive forming. Explosive forming a method of forming metals, mainly sheet metals, in which pressure is created by the force of the blast of a high explosive, powder, or gaseous mixture through a transmitting medium. What are the requirements for superplastic forming. Explosive forming, magnetic pulse forming and electro hydraulic forming come under high energy rate high speed forming processes. Improved lubrication if lubricating film is maintained.
The forming processes are affected by the rates of strain used. How to download all of the lectures for a course in nptel. Black powder, for example, may burn in the open air. An explosion may occur without an explosive, that is, without any material which contains intrinsically the energy needful to produce the explosion. If one thinks of the hammer blow of an oldtime, brawnyshouldered blacksmith on a glowing piece of iron, one gets a mental image of explosive forming, rather than of a fine machinist using a precise machine to turn screw threads on a part of a gun.
Rajkumar, assistant professor, kalasalingam university. To be even more precise, explosively formed projectiles efp are weapons of war that, before hitting their target, use high explosives to alter. It is one of the oldest metalworking arts with its origin about some thousands of years back. Blasts will take place by a low pressure explosive above the work piece. Manufacturing technology high velocity forming free download as powerpoint presentation. Nptel, an elearning initiative by the 7 indian institutes of technology and the indian institute of science with the support of the mhrd, govt. Forming nptel web course free ebook download as pdf file.
High energy rate forming herf principleskey feature of herf. This ebook, notes for the subject manufacturing technology1 covers the following. Chapter i properties of explosives an explosive is a material. Multishot explosive forming is sometimes carried out automatically the charges are fed in from a special supply bunker.
Jan 01, 20 conclusion hydroforming is an innovative forming process hydroforming is becoming more popular i. Analysis of water hammer forming on the sheet metal. The free forming of 321 stainless steel resulted in 1030% of the microstructure being classified as twinned, contrasting with the 14% after hydrostatic forming. Manufacturing technology high velocity forming forging. These three shaping methods can be considered competing processes. Press brake forming, explosive forming, hydro forming, electro hydraulic forming, and magnetic pulse forming.
High energy rate forming herf processes introduction. During this operation, the flux covering the electrode melts to provide a shielding gas, which is used to stabilize the arc column and shield the transfer metal. The temperature of work is increases due to adiabatic heating. Metal forming processes full notes ebook free download pdf. According to the speed of energy rate forming, the processes can be divided into the following categories. With few exceptions, denser explosives give higher detonation velocities and pressures. In this technique an explosive charge is used instead of a punch or press. It is an impulse or highvelocity forming method using pulsed magnetic field by application of lorentz forces to the work piece preferably made of highly electrically conductive material without having working medium and mechanical contact. Feb 28, 2015 hi fellas, check out the ebook of manufacturing technology1 for mechanical,automobile and industrial production engineering students. Density is an important consideration when choosing an explosive. Basic mechanical engineering covers a wide range of topics and engineering concepts that are required to be learnt as in any undergraduate engineering course. Water hammer, metal forming, plastic deformation, sheet metals.
Materials which do not become brittle at higher strain rates alone can be explosive formed. Civil engineering department civil engineering department. Conclusion hydroforming is an innovative forming process hydroforming is becoming more popular i. Manufacturing technology1 lecture notes,ebook, pdf download for mechanical. Studies on water hammer forming on sheet metal works. I will also share the lecture notes and other ebooks in pdf download format. Forging is a metal working process in which useful shape is obtained in solid state by hammering or pressing metal.
The explosive metal forming process this technique uses the energy generated by an explosive detonation to form the metal work piece. 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. Nov 17, 2014 advanced manufacturing processes by dr. Me6302 manufacturing technologyi previous year question papers february 23, 2018 may 25, 2019 syed afrith b. Students will be introduced to different industrial, military and government special uses such as avalanche control, explosive welding, forming, synthesis and hardening, aerospace, forest. Learn for free, pay a small fee for exam and get a certificate. It is typically used in cases where the metal is too large or thick for a traditional press or punch method to be cost effective. Explosive forming is a metalworking technique in which an explosive charge is used instead of a punch or press. Explosive forming is a process of forming a metal into a desired shape. Building materials and construction 140602 engineering geology 140604. Nitrogen tetroxide n2o4 is another liquid oxidizer capable of forming powerful explosives. Some commercial explosives with high fuel content may readily ignite and burn.
A punch in conventional forming is replaced by an explosive charge. Sheet metal operations other sheet metal forming processes nptel. N204 and combustible liquids cs2, nitrobenzene, nitrotoluene, gasoline, halogenated hydrocarbons were considered in the 1880s. 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. In order to manufacture a machine component, such as a wheel suspension arm for a car, one can choose metal forming, casting, or machining as the shaping method. Water hammer forming whf process is similar to explosive forming process in. Manufacturing companies producing metals supply metals in form of ingots which are obtained by casting liquid metal into a square cross section. Manufacturing technology1 lecture notes,ebook,pdf download. May 25, 2019 sheet metal characteristics shearing, bending and drawing operations stretch forming operations formability of sheet metal test methods special forming processesworking principle and applications hydro forming rubber pad forming metal spinning introduction of explosive forming, magnetic pulse forming, peen. Strength of materials ace academy gate notes free download. Practically all metals, which are not used in cast form are reduced to some standard shapes for subsequent processing. Electromagnetic forming em forming or magneforming is a type of high velocity, cold forming. Predicting the blast pressure on explosive forming process by.
Sharma, department of mechanical engineering, iit roorkee. Theory of machines institute of advanced studies in. This process can deliver a great deal of flexibility in the metal forming process. Advantages o it can simulate a variety of other conventional metal forming techniques such as stamp or press forming and spin forming in a single operation. How to download all of the lectures for a course in nptel quora. Industrial application of the electromagnetic pulse technology pdf. Pdf me6302 manufacturing technology i books, lecture. This is somewhat slower than the explosive forming process, similar to explosive forming in which an enormous amount of energy. Explosively formed projectile encyclopedia article. The explosive energy replaces the male part of the tool that is used in regular forming processes.
Divided into three parts, this book lays emphasis on explaining the logic and physics of critical problems to develop analytical skills in students. Strain rate and deformation velocity for some of the forming operations are given in table below. It exists over the narrow temperature range between its freezng point. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. High velocity forming of metals and high energy rate forming. 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. Download link is provided and students can download the anna university me6302 manufacturing technology i syllabus question bank lecture notes syllabus part a 2 marks with answers part b 16 marks question bank with answer, all the materials are listed below for the students to make use of it and score good maximum marks with our study. Explosive forming is a type of metalworking that can be used to shape very large workpieces.
On the other hand there are no twins in 301, 304, 316, 347, type stainless steel after explosive forming. Finite element analysis nptel online videos, courses iit. Electromagnetic forming emf is a noncontact forming technique. Applications and capabilities of explosive forming request pdf.400 72 619 1334 1306 1027 1188 775 37 679 500 1175 1493 381 667 962 927 960 455 815 1047 1209 439 745 1440 1067 1362 915 662 1564 302 1278 887 1499 314 567 202 1446 1181 202 1142 650