This process uses thermal energy to remove material from metallic or nonmetallic surfaces. Lbm can be used to process these materials with intricate shapes and. Laser beam welding can be used for welding of corrosion resistant steels and titanium alloys requiring high quality welds. Laser beam machining is a thermal energybased advanced machining process in which material is removed by focusing the laser beam on the work surface at a constant distance to melt and vaporize the unwanted work material. From the above merchants circle diagram it is found that there are three right angled triangles are present and all the three right angled triangle possessing common hypotenuse largest side opposite to right angle in a right angled triangle. Laser beam machining a mechanical engineering blog.
Part 3 elaborates chemical and electrochemical machining processes. Laser beam machining lbm is an excellent material processing technique to machine a wide range of advanced materials, especially difficulttomachine advanced ceramics and composites. Plasma arc machining process, diagram, advantages and. The processes can include laser drilling, cutting, grooving, writing, scribing, ablation, welding, cladding, milling, and so on. Laser beam machining is a nonconventional machining method. At the bottom of the articles you can easily download pdf.
Lecture 37 introduction of laser beam machining process digimat. Heat affecting zone analysis of polycarbonate in laser. Sharma, department of mechanical engineering, iit roorkee. In electro chemical machining an electrolyte acts as a current carrier. The course covers the details of the advanced machining theory and practices, advanced machining processes, advanced metal forming processes, advanced welding processes. When operating in the wet mode, water is fed through the tube being processed to capture laser splatter. April 8, 2017 december 26, 2018 pankaj mishra 0 comments machining process, manufacturing processes electron beam machining is process in which high velocity electrons are concentrated in a narrow beam and then directed towards the workpiece for machining.
Laser beam machining lbm is today the most common industrial application of laser for almost whole range of engineering materials. The main advantages of laser beam machining are ease of automation for complex cutting patterns, absence of tool wear and. Laser beam is focussed for melting and vaporizing the unwanted material from the parent material. The laser is light amplification by stimulated emission of radiation, and laser beam machining is a nontraditional way of manufacturing. Part 2 deals with thermal machining processes for example, electric discharge machining, laser beam machining, electron beam machining, etc. 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 materials and workpieces with intricate and accurate shapes. Manufacturing process technology part2 assignment 02 nptel.
The high frequency of monochromatic light will fall on the surface then heating. Electronbeam ebm and laser beam machining lbm are newer. It also includes micronanofinishing processes viz, abrasive flow finishing, magnetic abrasive finishing, etc. A free powerpoint ppt presentation displayed as a flash slide show on id.
How laser beam welding works laser beam welding process. This is a different process from electric discharge, electron beam, laser beam and plasma arc machining. Chemical machining is the material removal process for the production of desired shapes and dimensions. Electron beam machining ebm and laser beam machining lbm are thermal processes considering the mechanisms of material removal. Laser beam machining can be used for cladding, cutting, welding and drilling. Hence, it was realize to develop some nonconventional machining methods known as advanced machining processes. Parametric analysis of cutting parameters for laser beam. Electron beam machining mechanical engineering blog. Kinematic system and operations of milling machines. Nptel provides elearning through online web and video courses. Electrochemical machining ecm is a nontraditional machining process uses the principle of faraday to remove metal from the workpiece. The main operating parameters associated with laser assisted machining are. Quality control is a major part of the diamond turning process and is required after each machinabilityy of machining, sometimes after each pass of the cutting tool. Among thermal removal methods, electrical discharge machining or edm is the oldest and most widely used.
Module 3 selection of manufacturing processes nptel. Singh, balbir singh modern machining processes presents unconventional machining methods which are gradually commercial acceptance. 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. 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. In order to meet these challenges, a number of newer material. Quality control is a major part of the diamond turning process and is required after each stage of machining, sometimes after each pass of the cutting tool. Nptel provides elearning through online web and video courses various streams. In fact, its a subtractive manufacturing process in which a laser beam is used for cutting through the metals and other materials for. Laser beam machining, laser beam hybrid machining, and.
Material removal processes machining is the broad term used to describe removal of. Electron beam machining is same as laser beam machining process in which except laser, high speed electron beam impinges on work piece. It is done by selective or overall removal of material by a controlled chemical attack with acids or alkalies. 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. It finds wide applications in various industries like space tech, automobiles, avionics, shipbuilding and many others manufacturing process. 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. Mechanism, processes variants and applications of usm. Laser beam machining an overview sciencedirect topics. It offers its competences from macro machining to micro and nanomachining of simpletocomplex shapes. Laser beam machining is a thermal machining process which uses laser beam to produce heat. It is a gas laser built by ali javan at mit, with a wavelength of 632. Advanced machining processes video course mechanical. Plasma arc machining process, diagram, advantages and disadvantages.
In the electron beam machining process, a high velocity focused beam of electrons are used to remove the metal from the workpiece. A laser beam machining lbm database for the cutting of ceramic tile article pdf available in journal of materials processing technology 84. Advanced welding processes details of electron beam welding ebw laser beam welding. Download the seminar report for laser beam machining. Depending on the function required, industries utilize co2 or yag tools for laser beam machining, and computer numerical control cnc. 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.
Control parameters optimization of laser beam machining using. The water provides a smoother interior wall surface and reduces the heat affected zone. The machining results of laser cutting depend on both machining process parameters and laser parameters. Advantages and disadvantages ice jet machining process diagram and working electron beam machining ebm. F t, f c forces are defined based on actual machining conditions. Pdf a laser beam machining lbm database for the cutting. In this process, a laser beam is focused for melting and vaporizing to. 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. Ion beam machining is generally a surface finishing process in which the material removal takes place by sputtering of ions. It is a nontraditional machining process in which no physical tool is used. Pam lecture 17 electron beam machining ebm edit lesson lecture 18 laser beam machining lbm lecture 19 chemical machining chm.
Control parameters optimization of laser beam machining. Electron beam machining is a thermal process used for metal removal during the machining process. Today we will learn about laser beam machining principle, working, equipments, application, advantages and disadvantages with its diagram. Ultrasonic machining, water jet machining, abrasive water jet machining. Machining processes uri engineering computer center. Advanced casting processes metal mould casting continuous casting squeeze casting vacuum mould casting evaporative pattern casting ceramic shell casting 6 3.
Industrial automation and control delivered by iit. Jun 10, 2017 electro chemical machining consists of following basic elements. Here today we are going to study definition, working process, principle, advantages, disadvantages, and application note. It offers its competences from macro machining to micro and nano machining of simpletocomplex shapes. This will generate high heat energy and melts and vaporize metal from work piece. Sachin is a btech graduate in mechanical engineering from a reputed engineering college. Currently it is finding wide use in communication engineering application where very fine wires are required to be welded and on micro circuit boards etc.
Mar 30, 2017 today we will learn about laser beam machining principle, working, equipments, application, advantages and disadvantages with its diagram. Major applications of laser beam is in cutting of metals and non metals, soft. Laser power, spot diameter of the laser beam, cutting speed, feed rate and depth of. Laser beam machining lbm has proven its applications and advantages over almost all the range of engineering materials. Electro discharge machining edm electron beam machining ebm laser beam machining lbm processes 2. Conversion of electrical energy into heat energy to emit laser beam. Water jet and abrasive water jet machining youtube. Diesinker edm and wire cut electric discharge machining wedm 21. In thermal removing processes, thermal energy, provided by a heat source, melts or vaporizes the volume of the material to be removed. Advanced manufacturing processes usb media storage type. Apr 21, 2015 lbm is nontraditional thermal process. In this machining process metal is removed by melting and vaporization of metal particle from surface of work piece. Apr 08, 2017 how electron beam machining process works. 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 beam machining, laser beam hybrid machining, and micro. Lbm is one of the advanced machining processes which are used for shaping almost whole range of engineering materials. Apr 26, 2018 the laser is light amplification by stimulated emission of radiation, and laser beam machining is a nontraditional way of manufacturing. The high frequency of monochromatic light will fall on the surface then heating, melting and vaporizing of the material take place due. May 02, 2017 laser beam machining lbm is a form of machining process in which laser beam is used for the machining of metallic and nonmetallic materials. Electron beam machining ebm learn mechanical engineering.
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. In this process, a laser beam of high energy is made to strike on the workpiece, the thermal energy of the laser gets transferred to the surface of the wp workpiece. Ppt laser beam machining lbm powerpoint presentation. The metal is slowly converted into metallic salt by chemical reaction and is finally removed in this form. In the electrical beam machining, electrical energy is used to generate the electrons with high energy. Laser beam can very easily be focused using optical lenses as their wavelength ranges from half micron to around 70 microns. Electrolysis is based on faraday laws of electrolysis which is stated as.
Mechanical engineering n p t e l national programme on. Mar 31, 2017 it is a nontraditional machining process in which no physical tool is used. 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. 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. Laser beam machining lbm, response surface methodology rsm, genetic algorithm ga, optimization. Therefore, it is required to minimize the haz during. 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.
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