It works on the principle that when a high energy laser beam strikes the surface of the workpiece. Here a steam of high speed electrons impinges on the work surface so that the kinetic energy of electrons is transferred to work. Laser beam machining an overview sciencedirect topics. Laser micromachining an overview sciencedirect topics.
Nov 23, 2018 electrochemical machiningecm, laser beam machininglbm. In the last class, we had discussed about electrical. Laser beam welding equipment, principle, working with advantages and disadvantages may 4, 2017 september 27, 2019 email protected 49 comments laser beam welding is a fusion. Today we will learn about electron beam machining principle, working, equipments, application, advantages and disadvantages with its diagram. Jun 23, 2018 hello everyone welcome to engineers academy topics covered.
Apr 11, 2020 working principle laser beam machining working. This heat energy absorbed by the surface heat melts and vaporizes the material from the wp. Mar 30, 2017 today we will learn about laser beam machining principle, working, equipments, application, advantages and disadvantages with its diagram. 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. Main parts, principle, working with application april 11, 2020 april 11, 2020 suman kumar paul laser beam machining lbm is a method of machining that uses laser beam to mill metal and nonmetallic materials. In this machining process metal is removed by melting and vaporization of metal particle from surface of work piece. It is a nontraditional machining process in which no physical tool is used. The effect of marking is to expose deep substances through evaporation o. In the last class, we had discussed about electrical discharge. Laser micromachining has been extensively researched and developed to overcome the challenges in manufacturing where the traditional machining does not work due to its limitations.
No electrical conductivity of workpiece is required. Production of laser beam and with the use of lasers slideshare uses cookies. Electron beam welding process, applications and equipment. Depending upon the intensity of heating the workpiece can melt and vaporize. Laser beam machining is a thermal process having different advantages such as. May 31, 2018 download seminar report on the topic laser beam machining lbm. Laser beam machining main parts, principle, working with application at cathode the hydrogen ions takes electrons and gets converted into hydrogen gas. Laser beam machining lbm is a form of machining process in which laser beam is used for the machining of metallic and nonmetallic.
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. Manufacturing technology notes with pdf learn mechanical. Electron beam gun provides high velocity electrons over a very small spot size. The process used thermal energy to remove material from a metallic surface. Electrochemical machining ecm is a nontraditional machining process uses the principle of faraday to remove metal from the workpiece. Laser beam welding process principle, advantages, disadvantages principles.
The working principle of the laser cutting machine. Get the pdf seminar report paper explaining the principle of laser beam machining, experimental studies, applications, and major areas of lbm research. Electron beam machining is same as laser beam machining process in which except laser, high speed electron beam impinges on work piece. Laser beam welding is a technique in manufacturing whereby two or more pieces of material usually metal are joined by together through use of a laser beam. Hello everyone welcome to engineers academy topics covered. As the name implies in laser beam machining the source of energy is the laser light amplification by simulated emission of radiation. A lot of people to the laser cutting machine is not very understanding, most of whom were heard. When a quantum of energy from a light source is made to fall on this medium, it causes absorption of radiation by the atoms of the medium. The principle of a laser can be explained as follows. Plasma arc machining process, diagram, application, advantages and disadvantages introduction. Working of laser beam machining anuniverse 22 youtube.
Laser beam welding process in general cases heat is required to fuse the metals for any types of welding, in laser beam welding process the heat is obtained from the application of a. The operating principles of various thermal micromachining processes such. Plasma arc machining process, diagram, advantages and. Laser beam machining is a nonconventional machining method. Here today we are going to study definition, working process, principle, advantages, disadvantages, and application. In laser welding lbm the joint is made either as a sequence of overlapped spot welds or as a continuous weld. Find powerpoint presentations and slides using the power of, find free presentations research about electron beam machining ppt.
The laser beam s heat energy is passed to the w p surface. Principle, construction, working, characteristics, advantages, disadvantages and applications nd. A laser cutter is a prototyping and manufacturing tool used primarily by engineers, designers, and artists to cut and etch into flat material. Working, advantages, limitations, applications,laser projects, pdf. The working principle of laser machining is, laser beam machining. Main parts, principle, working with application april 11, 2020 april 11, 2020 suman kumar paul laser beam machining lbm is a method of machining that uses laser beam to. Laser beam machining is based on the conversion of electrical energy into light. The word laser, actually an acronym for light amplification by stimulated emission of radiation, has become synonymous with everything that is high tech and futuristic.
Today we will study definition, working process, principle, advantages, application with pdf amrit kumar shared a link. An alternative way of producing the population inversion needed for laser operation is to rapidly expand. Ppt laser beam machining powerpoint presentation free to. The laser beams heat energy is passed to the w p surface. Notes on electron beam machining ebm me mechanical. Weld cross sections of production parts will be shown to. Principle of laser beam welding this machining process works on basic property of laser. View and download powerpoint presentations on electron beam machining ppt.
The underline working principle of laser was first put forward by albert einstein in 1917. Laser beam is focussed for melting and vaporizing the unwanted material from the parent material. A laser beam is a nonconventional machining method in which the operation performed by the laser. Conversion of electrical energy into heat energy to emit laser beam.
It uses a laser beam, which is a narrow, monochromatic high intense light which can cut or machine any metal and nonmetal. Electron beam machining is required to be carried out in vacuum. Jan 06, 2015 electron beam machining process electron beam is generated in an electron beam gun. What is the working principle of laser cutting machine. The heat energy contained by the laser beam gets transferred to the surface of the wp. For the laser to produce a beam of light, the nitrogen atoms. Download seminar report on the topic laser beam machining lbm. May 04, 2017 laser beam welding equipment, principle, working with advantages and disadvantages may 4, 2017 september 27, 2019 email protected 49 comments laser beam welding is a fusion welding process in which two metal pieces are joined together by the use of laser.
Otherwise the electrons would interact with the air molecules, thus they would loose their energy and cutting. At this point, the laser achieves a state called population inversion, the point at which a system has more excited particles than nonexcited ones. Laser fusion cutting involves melting material in a column and using a highpressure stream of gas to shear the molten material away, leaving an open cut kerf. Laser beam machining process uses highly coherent light source. This beam can be focused by means of a lens on a very small spot in the work piece. This will generate high heat energy and melts and vaporize metal from work piece. Laser stands for light amplification by stimulated emission of radiation. Laser beam welding lbw is a welding technique used to join pieces of metal or thermoplastics through the use of a laser.
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. Lasers work on the central concept of converting electrical energy into a high energy density beam of light through stimulation and amplification. Laser beam machining main parts, principle, working with. Because of the high flexibility of ruby rod, the zigzag holes can be produced easily with laser beam machining. In this usage, the term light includes electromagnetic radiation of any frequency, not only visible light, hence the terms infrared laser, ultraviolet laser, xray laser and gammaray laser. Electrochemical machiningecm, laser beam machininglbm. The laser beam machining is a nonconventional matching method. Let us consider that the atoms of a medium for example, a ruby crystal rod are at the ground state.
Working principle of laser marking machine and its typical. Mar 17, 2016 electron beam machining ebm is a thermal process. The laser beam which generated by laser device transmitted through a series of the reflector, then focus on the workpiece surface by focus lens and. Laser beam welding lbw is a fusion joining process that produces coalescence of materials with the heat obtained from a concentrated beam of coherent, monochromatic light impinging on the joint to be welded. Laser beam machining an introduction laser stands for light amplification by stimulated emission of radiation. 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. Definition, working process, principle, advantages, disadvantages, application with pdf. The underline working principle of laser was first put forward by albert einstein in 1917 though the first industrial laser for experimentation was developed around 1960s. Laser beam machining is highly flexible machining system when it combines with multiaxis work positioning system or robot. Light from a laser typically has very low divergence.
When cutting mild steel, the heat of the laser beam is enough to start a typical oxyfuel burning process, and the laser cutting gas will be pure oxygen, just like an oxyfuel torch. The industrial laser is firmly established in metalcutting as the tool of choice for many applications. This paper provides a technical overview of the unique features of the electron beam welding process including several applications. Power requirement for laser beam machining is very high. The beam is traversed over a programmed path and material removal. 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. Definition, working process, principle, advantages, disadvantages, application with pdf june 4, 2018 difference between planer and slotter machine, pdf. They can directly absorb energy from electrons inserted into the gas in a discharge or electron beam.
Get the pdf paper explaining the principle of laser beam machining, experimental studies, applications, and major areas of lbm research. It works on the theory that if the workpiece is struck by a highintensity laser beam. It is also known as spark machining or spark eroding process principle in this process, electrical energy is used to generate the spark between the tool and workpiece submerged under the dielectric medium so that material removal takes place from the surface of the workpiece by local melting or vaporization. The laser stand for light stimulated emission of radiation. Laser cutting is able to cut faster and with a higher quality then competing processes. Its one kind of non traditional or advanced manufacturing process.
In the last class, we had discussed about electrical discharge machining, ultrasonic machining etc. During laser beam cutting, the material is locally heated by transferring the energy of the laser beam to the interacting zone. Here today we are going to study definition, working process, principle, advantages, disadvantages, and application note. Using the cutting gas flow from the gas nozzle the material is disposed of as vapor, melting charge, or slag either directly or after a reaction with the cutting gas. It can travel over great distances or can be focused. In this video we have explained working of laser beam machining process, we have seen the working principle, equipments used. Laser beam is focused over a particular area on workpiece which creates high intensified. Production of laser beam and with the use of lasers slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. The heat energy absorbed by the surface heat absorbs the material from the w p and sprays it. Today we will learn about laser beam machining principle, working, equipments, application, advantages and disadvantages with its diagram. Electrical discharge machining edm, electron beam machining. Laser is an acronym for light amplification by stimulated emission of radiation.
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. Thus, lbm can be adapted with automation, and n laser beam machining provides a wide range of material processing techniques ranging from drilling, cutting, grooving, scribing, marking, cleaning and turning etc. In this video we have explained working of laser beam machining process, we have seen the working principle. 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.
Apr 21, 2015 working of laser beam machining process. 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. A lot of people to the laser cutting machine is not very understanding, most of whom were heard someone mentioned in the peer, but dont know what was the basic working principle, let us give you a detailed explanation. Laser welding is used in the electronics, communications and aerospace industries, for the manufacture of medical and scientific equipment, joining small components. 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.
Mar 31, 2017 today we will learn about electron beam machining principle, working, equipments, application, advantages and disadvantages with its diagram. Ramesh singh process mechanisms the beam is traversed over a programmed path and material removal occurs due to multiple mechanisms melting material exhibiting molten phase of low viscosity, notably metals and alloys, and thermoplastics, are cut by the heating action of a beam of. This process uses thermal energy to remove material from metallic or nonmetallic surfaces. Plasmaarc machining pam employs a highvelocity jet of hightemperature gas to melt and displace. Master of science engineering technology, may 2001, 68 pp. Laser beam welding equipment, principle, working with. The beam provides a concentrated heat source, allowing for narrow, deep welds and.
1173 1271 562 432 342 1460 1416 826 1525 310 431 166 1367 323 958 1302 362 245 952 304 967 736 1082 41 19 320 519 1462 1480 945 1130 188 550 145 150 487