Called pam, this is a method of cutting metal with a plasmaarc, or tungsten inertgasarc, torch. The course is aimed at teaching the pros and cons of different processes, so that one can apply this knowledge to the selection of a process for making a part to the required. Introduction of laser beam machining process digimat. 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. Advanced machining processes dvd media storage type. The process of metal removal by electro chemical dissolution was known as long back as 1780 ad but it is only over the last couple of decades that this method has been used to advantage. The machining results of laser cutting depend on both machining process parameters and laser parameters. On this channel you can get education and knowledge for general issues and topics. Called pam, this is a method of cutting metal with a. Lecture 37 introduction of laser beam machining process. Laser beam machining and drilling lbm, plasma arc machining pam and electron beam.
These lasers can generate 400 to 1,500 watts of power, which can cut through 1inch 2. Plasma arc machining process, diagram, application, advantages and disadvantages introduction. Here the lasing material is in the form of a solid ruby. Plasmaarc machining pam employs a highvelocity jet of hightemperature gas to melt and displace material in its path. The water provides a smoother interior wall surface and reduces the heat affected zone. Water jet machining wjm is a mechanical energy based nontraditional machining process used to cut and machine soft and nonmetallic materials it involves the use of high velocity water jet to smoothly cut a soft workpiece. N 1 to achieve the condition of population inversion between e 2 and e 1 at moderate pumping. Laser cutting is mainly a thermal process in which a focused laser beam is used to melt material in a localised area. Other machining operations shaping and planing a singlepoint tool moves linearly relative to the work part shaping a tool moves planing a workpart moves broaching performed by a multipletooth cutting tool by moving linearly relative to the work in the direction of the tool axis. Control parameters optimization of laser beam machining using. Welcome to this session on laser beam machining under the course advanced manufacturing processes. Tool electrodes and dielectric fluids and electron beam machining.
Review on laser beam machining process parameter optimization. The course takes us through the fundamentals of different machining processes, and optimization of a chain of processes through which a part undergoes. 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. 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. Laser beam machining can be used for cladding, cutting, welding and drilling. Pdf a laser beam machining lbm database for the cutting. Sharma, department of mechanical engineering, iit roorkee. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. To learn about various unconventional machining processes, the various process parameters. Laser beam machining an overview sciencedirect topics. Beam, electron beam, ultrasonic, explosive and friction welding. It offers its competences from macro machining to micro and nano machining of simpletocomplex shapes. Apr 21, 2015 lbm is nontraditional thermal process.
Advanced machining processes online course video lectures. Ultrasonic machining national institute of technology. The processes can include laser drilling, cutting, grooving, writing, scribing, ablation, welding, cladding, milling, and so on. 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. Pdf for more pdf change last digit of link from 1 36. Advanced machining processes online course video lectures by.
Non traditional machining jagadeesha t, assistant professor, med, national institute of technology, calicut ultrasonic machining definition. Advanced machining processes video course mechanical. As contrasted to the additivejoining processes covered in the course manufacturing processes 1viz. Control parameters optimization of laser beam machining. Ppt laser beam machining lbm powerpoint presentation. A continuous cut is produced by moving the laser beam or workpiece under cnc control. 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. Smart material, adaptive structures and intelligent mechanical systems iitk. Laser beam machining lbm, response surface methodology rsm, genetic algorithm ga, optimization. So, laser beam welding as i told we use the laser as a heat source to heat up the. Laser beam machining, laser beam hybrid machining, and. This system offers large area processing with the tolerances found in small area processing systems. The electrolyte in ecm should have high electrical conductivity, low viscosity, high specific heat, chemical stability, resistance to form a passivating film on the workpiece surface, non. Laser beam machining lbm tutorial of advanced manufacturing processes course by prof a.
A laser is a device that emits light through a process of optical amplification based on stimulated emission of electromagnetic radiation. In this process, a laser beam is focused for melting and vaporizing to. Jun 10, 2017 electro chemical machining consists of following basic elements. Water jet and abrasive water jet machining youtube. The laser beam focuses on an alumina target with an irradiance of 2. A coaxial gas jet is used to eject the molten material and create a kerf. Parametric analysis of cutting parameters for laser beam. Nptel video courses pack pdf format nptel user pack. Ultrasonic machining, water jet machining, abrasive water jet machining. Such processing is carried out utilizing the energy of coherent photons or laser beam, which. Paul,department of mechanical engineering, iit kharagpur.
How laser beam welding works laser beam welding process. Laser welding is by far the most efficient and fast welding technique ever. It also includes micronanofinishing processes viz, abrasive flow finishing, magnetic abrasive finishing, etc. Industrial automation and control delivered by iit. Electro chemical machining consists of following basic elements. It finds wide applications in various industries like space tech, automobiles, avionics, shipbuilding and many others manufacturing process. Welcome to the course on advanced machining process. A co2 laser is one of the more powerful types of laser used in laser beam machining. Hence, it was realize to develop some nonconventional machining methods known as advanced machining processes. The light produced is a coherent, monochromatic and collimated beam which can be focused to small spots of diameter of 0.
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. Plasma arc machining process, diagram, advantages and. Notes on electro chemical machining ecm me mechanical. Electronbeam ebm and laser beam machining lbm are newer. 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. In addition, non traditional manufacturing processes, like electrodischarge machining edm, laser beam machining, plasma cutting etc are also a part of this course. Sep, 2016 autoplay when autoplay is enabled, a suggested video will automatically play next.
May 12, 2017 laser beam machining main parts, principle, working with application at cathode the hydrogen ions takes electrons and gets converted into hydrogen gas. Laser beam welding is a welding process that uses a laser beam to melt and vaporize material. 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. This process uses thermal energy to remove material from metallic or nonmetallic surfaces. Basics of fixturing and metrology are also covered in this course. It offers its competences from macro machining to micro and nanomachining of simpletocomplex shapes. Michael faraday discovered that if the two electrodes are placed in a bath containing a conductive liquid and dc potential 525v is applied across. Me 338 manufacturing processes ii department academic. Autoplay when autoplay is enabled, a suggested video will automatically play next. Nptel video lecture topic list created by linuxpert systems, chennai. In thermal removing processes, thermal energy, provided by a heat source, melts or vaporizes the volume of the material to be removed. The tool uses mirrors that direct the proton laser beam to the desired cutting location. Laser beam machining lbm has proven its applications and advantages over almost all the range of engineering materials.
Laser beam machining lbm is a machining method primarily used for hard metals or those that would be impossible to machine with traditional techniques. In electro chemical machining an electrolyte acts as a current carrier. Current research and development in laser beam machining. 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. Today we shall discuss about a new process which is called laser beam. It is similar to abrasive jet machining ajm in water jet machining, high velocity water jet is allowed to strike a given workpiece. Part 3 elaborates chemical and electrochemical machining processes. Part 2 deals with thermal machining processes for example, electric discharge machining, laser beam machining, electron beam machining, etc.
The preco flexpro cnc laser cutting system provides the speed of galvanometer processing with all the versatility of an xy motion system. Laser beam machining or more broadly laser material processing deals with machining and material processing like heat treatment, alloying, cladding, sheet metal bending etc. Current research and development in laser beam machining \lbm\. Current research and development in laser beam machining lbm.
How laser beam welding works laser beam welding process laser beam welding setup. This video is a thorough demonstration on how to align a co2 laser beam and get the best out of the am. Beam machining process lecture 36 functional characteristics of ebm process edit lesson lecture 37 introduction of laser beam machining process lecture 38 material. The laser beam machining was carried out on laser backwriting configuration 4. These methods form a group of processes which removes excess material by various. Download the seminar report for laser beam machining. 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. When operating in the wet mode, water is fed through the tube being processed to capture laser splatter. 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. Nptel video course aerospace engineering jet aircraft propulsion. Advanced machining processes video course course outline there is a need for machine tools and processes which can accurately and easily machine the most difficulttomachine. At cathode the hydrogen ions takes electrons and gets converted into hydrogen gas.
Electron beam machining ebm and laser beam machining lbm are thermal processes considering the mechanisms of material removal. Lbm is one of the advanced machining processes which are used for shaping almost whole range of engineering materials. Research parameters optimization of laser beam machine as laser beam machine, cutting speed power, gas pressure, laser power. Among thermal removal methods, electrical discharge machining or edm is the oldest and most widely used. Lecture series on manufacturing processes ii by prof. Ultrasonic machining national institute of technology calicut. Fast extreme water jet cutter machine working, modern technology waterjet cutting compilation duration. We move on to the introduction about laser beam welding. The co2 laser technology is good for cutting, marking and engraving on various on nonmetal materials. See the first video i will show you laser welding setup in a laboratory in. Jain, department of mechanical engineering, iit kanpur. Such processing is carried out utilizing the energy of coherent photons or laser beam, which is mostly converted into thermal energy upon. Major applications of laser beam is in cutting of metals and non metals, soft. 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.
To learn about various unconventional machining processes, the various process parameters and their influence on performance and their applications. The main operating parameters associated with laser assisted machining are. Laser power, spot diameter of the laser beam, cutting speed, feed rate and depth of. Laser beam is focussed for melting and vaporizing the unwanted material from the parent material. Fundamentals, types, and operations n n e 0 e e 1 e 3 e 0 e e 1 2 fast decay fast decay fast decay pumping pumping lasing lasing a b figure 1. Laser is light amplified stimulated emission of radiation. 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. This process works on the principle of of faradays laws of electrolysis. Laser beam machining main parts, principle, working with application. Part 2 deals with thermal machining processes for example, electric discharge machining, laser.
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