Lecture 34 tool electrodes and dielectric fluids and electron beam machining lecture 35 mechanics of electron beam machining process lecture 36 functional characteristics of ebm process edit lesson lecture 37 introduction of laser beam machining process lecture 38 material removal rate of lbm. It finds wide applications in various industries like space tech, automobiles, avionics, shipbuilding and many others manufacturing process. Laser beam machining free download as powerpoint presentation. Apr 14, 2020 a co2 laser is one of the more powerful types of laser used in laser beam machining. 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. Singh, balbir singh modern machining processes presents unconventional machining methods which are gradually commercial acceptance. Ppt laser beam machining powerpoint presentation free. Advanced machining process mechanical engineering mcq. Laser beam machining lbm is one amongst the foremost widely used thermal energy based noncontact kind advance machining method which may be applied for nearly whole vary of materials. The electron beam polishing equipment technology is brought forward and its characteristic is explained because general processing method cant obtain preferable machining efficiency and product. The laser beam machining process can be carried out, when the media for energy transfer between tool and workpiece is. The laser beam focuses on an alumina target with an irradiance of 2. Ramesh singh laser soldering and brazing in the laser soldering and brazing processes, the beam is used to melt a filler addition, which wets the edges of the joint without melting the base material.
Electro chemical discharge machining ecdm lecture 23 laser beam machining lbm lecture 24 equipment and process parameters in lbm. Laser assisted cutting the ever higher demands placed on technical products are increasingly leading various industries to utilize high performance materials, but machining these materials is not really an economic matter. The laser beam machining is essentially based on the effects generated at the contact of the workpiece surface with a laser beam that has adequate energetically and spatial temporal. Hence, the characteristic of noncontact between the tool and the. Laser beam welding and diffusion welding process tutorial of advanced manufacturing processes course by prof a.
May 31, 2018 laser beam machining lbm is one amongst the foremost widely used thermal energy based noncontact kind advance machining method which may be applied for nearly whole vary of materials. Learn for free, pay a small fee for exam and get a certificate. These lasers can generate 400 to 1,500 watts of power, which can cut through 1inch 2. Electro chemical discharge machining ecdm laser beam machining lbm equipment and process parameters in lbm electrochemical machining ecm ecm kinematics and tool design the subsystems in ecm. Research parameters optimization of laser beam machine as laser beam machine, cutting speed power, gas pressure, laser power. The laser stand for light stimulated emission of radiation.
A continuous cut is produced by moving the laser beam or workpiece under cnc control. This process uses thermal energy to remove material from metallic or nonmetallic surfaces. The laser beam machining is essentially based on the effects generated at the contact of the workpiece surface with a laser beam that has adequate energetically and spatial temporal characteristics and is directed and focused or defocused by means of. Laser beam machining is a thermal machining process which uses laser beam to produce heat. Advanced casting processes metal mould casting continuous casting squeeze casting vacuum mould casting evaporative pattern casting ceramic shell casting 6 3. Mar 17, 2016 electron beam machining ebm is a thermal process. Ion beam machining machine tool technology britannica. Liquidassisted laser beam machining lalbm process is used as an alternative to existing laser beam machining lbm process to address the problems associated with the extreme heat of the laser. Laser beam is focussed for melting and vaporizing the unwanted material from the parent material. Laser beam machining lbm is a novel thermal energy based advanced machining process which can be used for machining a wide range of materials. The laser beam machining was carried out on laser backwriting configuration 4.
In this process, a laser beam is focused for melting and vaporizing to remove material from the workpiece as per the desired shape 1. Among thermal removal methods, electrical discharge machining or edm is the oldest and most widely used. A laser beam is a nonconventional machining method in which the operation performed by the laser. Electron beam, plasma beam and ion beam machining youtube. Sharma, department of mechanical engineering, iit roorkee. Additive manufacturing technologies 20 electric discharge machining 439 electroforming 443 electron beam machining 446 electroplating 452 etching 483 eutectic bonding 488 induction heating 692 ion beam machining 717 laser ablation 736 laser beam machining 739 microwave radiation 877 physical vapor deposition pvd. Laser beam machining can be used for cladding, cutting, welding and drilling. Laser beam machining main parts, principle, working with. 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. Advanced machining processes online course video lectures by. Even though the significant advantages of top hat laser beam profiles for direct laser micro machining applications have recently been demonstrated, yet the gaussianshaped raw laser beam is still. 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.
In fact, its a subtractive manufacturing process in which a laser beam is used for cutting through the metals and other materials for getting the desired product. In another report commerciallyavailable ceramic tiles were cut using a co 2 laser cutting machine, with the object of producing a laser beam machining lbm database that would contain the. 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. Electron beam machining ebm and laser beam machining lbm are thermal processes considering the mechanisms of material removal. Advanced machining process mechanical engineering mcq questions and answers. The beam removes atoms from the workpiece by transferring energy and momentum to. The high frequency of monochromatic light will fall on the surface then heating, melting and vaporizing of the material take place due. Lbm can be used to process these materials with intricate shapes and. How laser beam welding works laser beam welding process. Parametric analysis of cutting parameters for laser beam. Laser beam machining and drilling lbm, plasma arc machining pam and electron beam. Similarly huge amount of energy can be generated in laser also by focusing this laser light into a very small area so that we can get a high energy density and we. Non traditional machining jagadeesha t, assistant professor, med, national institute of technology, calicut ultrasonic machining definition.
All aspects of mechanical, electrochemical and thermal processes are comprehensively covered. The tool uses mirrors that direct the proton laser beam to the desired cutting location. Laser beam machining lbm is a nonconventional machining process, which broadly refers to the process of material removal, accomplished through the interactions between the laser and target materials. Laser beam machining lbm is a thermal energy based advanced machining process in which the material is removed by i melting, ii vaporization, and iii chemical degradation chemical bonds are broken which causes the materials to degrade. Pdf while making a part from raw material, one may require bulk removal of material, forming cavitiesholes and. Advanced welding processes details of electron beam welding ebw laser beam welding. Electron beam machining ebm laser beam machining lbm processes 2. Part 2 deals with thermal machining processes for example, electric discharge machining, laser beam machining, electron beam machining, etc.
Depending upon the intensity of heating the workpiece can melt and vaporize. Laser beam machining process uses highly coherent light source. Control parameters optimization of laser beam machining. The processes can include laser drilling, cutting, grooving, writing, scribing, ablation, welding, cladding, milling, and so on.
Nov 05, 2014 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. Laser beam machining lbm, response surface methodology rsm, genetic algorithm ga, optimization. In this machining process metal is removed by melting and vaporization of metal particle from surface of work piece. Welcome to this second session on laser beam machining under the. Lecture 20 diesinker edm and wire cut electric discharge machining wedm lecture 21 variant processes in edm lecture 22 electro chemical discharge machining ecdm lecture 23 laser beam machining lbm lecture 24 equipment and process parameters in lbm lecture 25 electrochemical machining ecm lecture 26 ecm kinematics and tool. Laser beam welding and diffusion welding process video. On this channel you can get education and knowledge for general issues and topics. The adaptability of laser beam machining allows them to perform more than one function, and the wide range of industries that often use laser beam machining technology includes automakers and jewelers. Report laser beam machining please fill this form, we will try to respond as soon as possible. May 02, 2017 laser beam machining main parts, principle, working with application may 2, 2017 december 26, 2018 pankaj mishra 2 comments manufacturing processes laser beam machining lbm is a form of machining process in which laser beam is used for the machining of metallic and nonmetallic materials. Hence, it was realize to develop some nonconventional machining methods known as advanced machining processes.
Conversion of electrical energy into heat energy to emit laser beam. Thermal phenomena at the laser beam machining request pdf. Nptel, online courses and certification, learn for free. Other articles where ion beam machining is discussed. Laser direct micromachining with tophatconverted single. In thermal removing processes, thermal energy, provided by a heat source, melts or vaporizes the volume of the material to be removed.
The light produced is a coherent, monochromatic and collimated beam which can be focused to small spots of diameter of 0. Welcome to this session on laser beam machining under the course advanced manufacturing processes. Ultrasonic machining, water jet machining, abrasive water jet machining. 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. To learn about various unconventional machining processes, the various process parameters. Advanced casting processes metal mould casting continuous casting squeeze casting. In this process, a laser beam is focused for melting and vaporizing to. Laser cutting is mainly a thermal process in which a focused laser beam is used to melt material in a localised area. The laser cutting process uses a focused laser beam and assist gas to sever metallic plate with high accuracy and exceptional process reliability. Control parameters optimization of laser beam machining using.
Laser beam welding is a welding process that uses a laser beam to melt and vaporize material. Here the lasing material is in the form of a solid ruby. Heating these materials with the aid of a laser beam during machining opens up a whole new range of ef. This beam can be focused by means of a lens on a very small spot in the work piece. In abrasive jet machining, a focused stream of abrasive particles, carried by high pressure air or gas is made to impinge on the work surface through a nozzle and the work material is made to impinge on the work surface through a nozzle and work. Thermal phenomena at the laser beam machining springerlink. Ppt laser beam machining lbm powerpoint presentation. Ion beams machining ibm is an important nonconventional manufacturing technology hellborg et al. Laser beam machining is a nonconventional machining method. Nptel provides elearning through online web and video courses various streams. Ultrasonic machining is a nontraditional process, in which abrasives contained in a slurry are driven against the work by a tool oscillating at low amplitude 25100 microns and high frequency 1530 khz. Electro discharge machining edm electron beam machining ebm laser beam machining lbm processes 2.
Current research and development in laser beam machining lbm. It offers its competences from macro machining to micro and nano machining of simpletocomplex shapes. Description download laser beam machining comments. Electronbeam ebm and laser beam machining lbm are newer. Ultrasonic machining national institute of technology. This will generate high heat energy and melts and vaporize metal from work piece. How laser beam welding works laser beam welding process laser beam welding setup. Laser beam machining main parts, principle, working with application. It also includes micronanofinishing processes viz, abrasive flow finishing, magnetic abrasive finishing, etc. Notes on electron beam machining ebm me mechanical. Laser beam machining lbm is an excellent material processing technique to machine a wide range of advanced materials, especially difficulttomachine advanced ceramics and composites. Laser beam is focused over a particular area on workpiece which creates high intensified concentration on work piece because of which the work piece melts, thus giving the required shape. Laser is light amplified stimulated emission of radiation.
Such processing is carried out utilizing the energy of coherent photons or laser beam, which. Electrical, electronics and communications engineering. Laser beam machining lbm is one of the most widely used thermal energy based noncontact type advance machining process which can be applied for almost whole range of materials. Most researchers use their institutional email address as their researchgate login. School of industrial engineering, purdue university. Electron beam ebm and laser beam machining lbm are newer. At cathode the hydrogen ions takes electrons and gets converted into hydrogen gas. Laser beam machining knowles major reference works. Nptel syllabus advanced manufacturing processes video course course outline the course covers the details of the advanced machining. Lecture series on manufacturing processes ii by prof.
Laser beam machining is a nonconventional machining method in which the operation performed by the laser. Apr 26, 2018 the laser is light amplification by stimulated emission of radiation, and laser beam machining is a nontraditional way of manufacturing. Apr 21, 2015 lbm is nontraditional thermal process. At the bottom of the articles you can easily download pdf. Major applications of laser beam is in cutting of metals and non metals, soft. Jain, department of mechanical engineering, iit kanpur. Laser beam machining or more broadly laser material processing deals with machining and material processing like heat treatment, alloying, cladding, sheet metal bending etc. 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. The process used thermal energy to remove material from a metallic surface. Download the seminar report for laser beam machining. Ibm can be classified into two main categories, that is, largearea ion beam machining libm technology and focused ion beam machining. A laser is a device that emits light through a process of optical amplification based on stimulated emission of electromagnetic radiation.
Current research and development in laser beam machining \lbm\. Pdf laser beam machining process is one of the thermal advanced machining processes use for machining. A coaxial gas jet is used to eject the molten material and create a kerf. Today we will learn about laser beam machining principle, working, equipments, application, advantages and disadvantages with its diagram. Part 2 deals with thermal machining processes for example, electric discharge machining, laser beam machining, electron beam machining. Use the link below to share a fulltext version of this article with your friends and colleagues. Laser beam machining lbm has proven its applications and advantages over almost all the range of engineering materials. Laser beam machining an overview sciencedirect topics. Some of the processes employed for hole making are electrodischarge machining, laser beam machining, electron beam machining, shaped tube electrochemical. Lbm is one of the advanced machining processes which are used for shaping almost whole range of engineering materials. Electron beam machining is same as laser beam machining process in which except laser, high speed electron beam impinges on work piece. Mechanical engineering distributed loads on beams 1 of. The laser beam machining is essentially based on the effects generated at the contact of the workpiece surface with a laser beam that has adequate energetically and spatial temporal characteristics and is directed and focused or defocused by means.