Design of machine elements lecture series on design of machine elements i by prof. The mission of nptel is to enhance the quality of engineering education in the country by providing free online courseware. Determine the displacement at point c on the beam shown below. Bifano an ionbeam microcontouring process is developed and implemented for. Unconventional machining lecture 8 laser beam machining. Abrasive jet machining but not water jet machining c. Determine the displacement at points d on the beam shown below. Ion beam machining machine tool technology britannica. Taicnc limited cnc double column machining centers tai cnc was established in 2000,earlier as a sales agent of a high tech pc based nc machine manufacturer from taiwan,with the development of the mainland market, we built a new factory in 2006 and brought technique and management from taiwan aimed to provide mainland customers a better. This defines the upper limit of laser processing precision at a specific frequency. This initiates the cutting process in the work material. Electron beam machining is required to be carried out in vacuum. Introduction of laser machining processes aml home. Other articles where ion beam machining is discussed.
Ion beam, focused ion beam, and plasma discharge machining. The most common ion beams are of singlycharged ions. Chakraborty, department of mechanical engineering, iit kharagpur. The construction and working principle of the electron beam gun would be discussed in the next section. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. Ion beams have many uses in electronics manufacturing principally ion implantation and other industries. Here a steam of high speed electrons impinges on the work surface so that the kinetic energy of electrons is transferred to work producing intense heating. A pulsating stream of highspeed electrons produced by a generator is focused by electrostatic and electromagnetic fields to concentrate energy on a very small area of work. Full text of popular mechanics 1958 internet archive. Ebm can be used for very precise cutting or boring of a wide variety of metals. Electron beam machining ebm is a metal removal process by a high velocity focused stream of electrons. Notice that this beam must be divided into three sections to accommodate the real and virtual moment expressions deflections example. In this research work, the effect of process parameters such as cutting speed.
This book is an attempt to consolidate the basic scientific studies in the machining area so that fundamental mechanics and other concepts. Townsend it is now apparent that ion beams have a role to play in the machining and polishing of optical components. Ion beams have many uses in electronics manufacturing principally ion implantation and other industries ion beam machining takes place in a vacuum chamber, with charged atoms ions fired from an ion source towards a target the work piece by means of an accelerating voltage. Ionbeam machining of millimeter scale optics prashant m. A definition and description of ion beam machining has been given as follows.
Depending upon the intensity of heating the workpiece can melt and vaporize. Optical applications of ion beam machining sciencedirect. Nptel provides elearning through online web and video courses various streams. The high power radiation of laser gives rise to high temperature on a small area of work piece. In the last article we learnt about the electron beam machining, and in this article, we will learn about the next unconventional machining process laser beam machining lbm laser beam machining. Nondestructive testing ndt is a wide group of analysis techniques used in science and technology industry to evaluate the properties of a material, component or system without causing damage. Introduction laser beam machining lbm is a novel thermal energy based advanced machining process which can be used for machining a wide range of materials. Surface finish is better and kerf width is narrower than those for other thermal cutting processes. May 02, 2020 electron beam and laser beam module 9 non conventional machining lesson 40 electrical engineering ee notes edurev is made by best teachers of electrical engineering ee. Free download engineering ebooks pdf ppt lecture notes. Parametric analysis of cutting parameters for laser beam.
This document is highly rated by electrical engineering ee. Lecture series on manufacturing processes i by prof. Laser beam machining lbm, response surface methodology rsm, genetic algorithm ga, optimization. Steadystate response of an infinite beam on elastic foundation subject to moving load, j of sound and vibration, 291, 1148 1169, 2006 a. Machine design ii video lecture study material in dvd and. Electron beam gun provides high velocity electrons over a very small spot size. Short notes for gate mechanical engineering laser beam. In the last one year, a class clean room has been established in iit kanpur and perhaps it is among the very few in the academic institutions of the country. The workpiece in electron beam machining is held in a. Answers to the assignments with full explanation nptel. A variety of ion beam sources exists, some derived from the mercury vapor thrusters developed by nasa in the 1960s.
Laser beam machining lbm is one of the advanced machining processes which are used for shaping almost whole range of engineering materials. Electron beam machining process electron beam is generated in an electron beam gun. Nptel mechanical engineering advanced machining processes. Based on his work experience, francis martin talk explain the various type of electron beam and xray equipment. Nontraditional abrasive machining methods include a. The setup consists of a stimulating light source like xenon flash lamp and a laser rod. In ibm a stream of charged atoms ions of an inert gas, such as argon, is accelerated in a vacuum by high energies and directed toward a solid workpiece. Ltd, japan 3department of mechanical engineering yokohama, japan okayama university, okayama 7008530. The ability to manufacture and manipulate components at the microscale is critical to the development of micro systems. Laser beam machining process uses highly coherent light source.
Other articles where electronbeam machining is discussed. In electron beam machining, the order in which electrons passed after emitted by filament cathode. Cnc double column machining centers manufacturers on t1. In ebm, electrons are accelerated to high velocity as half of the light speed, then it is impinged to. Laser is the term used for the phenomenon of amplification of light by stimulated emission of radiation. Control parameters optimization of laser beam machining. Beam machining ebm and highenergy coherent photons in case of laser. Banas united aircraft research laboratories i summary a direct comparison was made of electron beam, laser beam and arc welding processes in ti6alw alloy in nominal thicknesses of 0. However in electrochemical machining there is a physical tool that is very much required for machining. Publications and outreach activities, mc deo, tvm rao doc. A strutandtie design method proposed by txdot project 05253, initially calibrated for. Design of machine elements nptel online videos, courses.
Electron beam, laser beam and plasma arc welding studies by c. Electronbeam machining ebm is a process where highvelocity electrons concentrated into a narrow beam are directed toward the work piece, creating heat and vaporizing the material. Otherwise the electrons would interact with the air molecules, thus they would loose their energy and cutting. The diffraction free focus spot size is proportional to light wavelength. In ion beam machining ibm a stream of charged atoms ions of an inert gas, such as argon ar, is accelerated in a vacuum by high energies and directed towards a solid workpiece. The effects of the following variables were evaluated. Nptel provides elearning through online web and video courses in engineering, science and humanities streams. Series vp penu cyl vcypnmc001e free download as pdf file. Abstract electron beam is generated in an electron beam gun.
The quality of cut depends upon many control factors or parameters such as laser beam parameters laser power, pulse width, pulse frequency, modes of operation, pulse energy. An ion beam is a type of charged particle beam consisting of ions. The beam removes atoms from the workpiece by transferring energy and momentum to. In a vacuum chamber, a beam of highvelocity electrons is focused on a workpiece. Laser beam machining or more broadly laser material processing deals with machining and material processing like heat treatment, alloying, cladding, sheet metal bending etc. All major equipment has been installed, in accordance with the plan to produce the first prototype display before the end of the year. Electron beam and laser beam module 9 non conventional. In lbm, surface roughness is one of important response which affects the quality characteristics of product.
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. For example in laser jet machining, machining is carried out by laser beam. This paper presents the technique to manipulate micronano parts at the micronanoscale using an integrated focused ion beam fib system composed of scanning electron microscope, micro manipulator and gas injection system. This beam can be focused by means of a lens on a very small spot in the work piece. 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. This process uses thermal energy to remove material from metallic or nonmetallic surfaces. Electronbeam machining is a kind of machining process by using highvelocity electron beam. As the electrons strike the work piece with high velocity, their kinetic energy is transformed into thermal energy which melts and vaporizes the material. In this process, a laser beam is focused for melting and vaporizing to. Module 3 selection of manufacturing processes nptel. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext.
Series vp penu cyl vcypnmc001e stainless steel steel. Notes on electron beam machining ebm me mechanical. Ibm can be classified into two main categories, that is, largearea ion beam machining libm technology and focused ion beam. It is similar to the electron beam welding machine. The ebm technique is used for cutting fine holes and slots in any material.
748 655 510 1112 282 1439 892 1240 1180 1539 687 101 421 1240 1375 91 1531 155 974 1144 1235 691 835 1323 830 983 813 576 413 564 34 1000 370 524 83 540 4 501 699 1236 1483 1374 91 685 648 1416