in laser beam machining process lens is used to
https://www.sciencedirect.com/topics/engineering/laser-beam-machining. c) Drilling 9. c) Kept at normal temperature b) Insulators The working principle of laser machining is. LASER CUTTING PARAMETERS The process of laser cutting involved many parameters, which can be generally divided into two main categories—beam parameters and process parameters [3,5,6]. a) With decrease in cutting speed The laser beam machining apparatus comprises a laser oscillator for producing a pulsed laser beam. The defecting coil does not allow to beam deflect and take care of all electrons moves in series thus form a high intense beam. This is one form of cutting process with laser to cut a contour out of the plate by moving the laser beam … This beam can be focused by means of a lens on a very small spot in the work piece. In general we know the work of capacitor, It is used for storing and releasing the charge. Selective heat treating of materials. c) Not present In this process, the Laser Beam is called monochromatic light, which is made to focus on the workpiece to be machined by a lens to give extremely high energy density to melt and vaporize any material. Example if body needed any laser operation then we are the work piece for this machine, same like manufacturing the objects needs to be drill or hole the Laser machine carried out the operation. Laser beam machining process uses highly coherent light source. In the Electron Beam Machining process, a high velocity focused beam of electrons are used to remove the metal from the workpiece. I also wrote articles on some other processes do check out those too. The major function of this process is that the brittle materials […], In this article, I'll show you everything you need to know about the Die Casting Process. The process used thermal energy to remove material from a metallic surface. d) Light amplification by stimulated emission of reaction Explanation: Laser beam machining is more versatile and can be used for metal as well as non metal. And if you want to download a PDF of this article you can download I have attached at the end. In this article first, we will see the Definition, How it's Work after that I'll also show you the Applications, Advantages, […], In the field of mechanical engineering, the Extrusion Process is widely used by the engineers to form an object which has a fixed cross-sectional area. Today in this article I am going to give you an in-depth overview of Electron Beam Welding Machine. a) Conductors The construction and 1. LASER Beam Machining Application . It is monochromatic light or single wavelength light which is unidirectional in nature. d) None of the mentioned Lense are provided here for vision purpose. Spectroscopic Science. In order to overcome diffraction limits, techniques of laser nano-machining have been developed (Li et al. First laser light will enter into the expanding lens and then into the collimating lens which makes the light rays parallel and the expanding lens expands the laser beams to the desired size. Now we are moving to construction or Main Parts, So. An intense heat is created by the laser as the light beam is magnified through the lens and focused by it. The laser light has maximum temperature strikes on the workpiece, due to high temp the workpiece gets melts. Which produces high heat and the portion of the metal is melted and vapourises. View Answer, 4. Vaporization. The highly focused, high-density energy melts and evaporates portions of the workpiece in a controlled manner. The Flash is simulated with the high-intensity white light from Xenon. Here it is used during the flashing process. In this way the machining of material takes place by the use of laser beam.Also Read: 1. What it does: The 4.0” inch lens produces a focused beam over a longer vertical distance, which makes it ideal when engraving within a recessed area of a product, such as inside a bowl or box. Electron Beam Machining – Process Electron beam is generated in an electron beam gun. Three Marks Questions with Answers 1. There is no direct contact between the tool and the work. Laser trepanning is used to produce large size holes, by drilling a series of overlapping holes around their perimeter with either a high repetition rate pulsed laser, CW, or quasi-CW laser. Edmund Optics offers Laser Beam Shaping solutions to collimate laser beams, transform beam profiles, convert beam shapes, and much more. 2011). The most common lens, and the one that is shipped with the K40, is the 2.0″ or 50.8mm lens. You can control the beam intensity, length and heat output depending on the material you are working with, and can also user a mirror or special lens to further focus the laser beam. How Does the Lens Used Affect the Thickness of the Cut? This Welding Process was first developed in 1949 by Karl-Heinz Steigerwald who was a German physicist. The design of this site was heavily, heavily inspired by, Electron Beam Welding: Definition, Construction, Working, Applications, Advantages, and Disadvantages [Notes with PDF], Extrusion Process: Definition, Working Principle, Types, Applications, Advantages, and Disadvantages [Notes with PDF], Die Casting: Definition, Process, Types, Defects and Remedies, Applications, Advantages, Disadvantages [With PDF]. Laser Beam Machining Construction or Main Parts: Let us know if you liked the post. b) Decrease in laser beam spot diameter Participate in the Sanfoundry Certification contest to get free Certificate of Merit. The invention relates to a method for joining workpieces ( 12, 13 ) using a laser beam ( 7 ), wherein the laser beam ( 7 ) is focused onto a focal plane downstream of the machining plane in the beam propagation direction and subdivided into a plurality of partial beams ( 19 ) by means of a beam dividing device ( 6 ). When the power is supplied the electron gets in an excited state that means ready to work. Any material can be machined including non-metal. a) Kept cold Photography in medical science. Melt Cutting. They use to focus beam at a spot on work piece so a high intense beam reaches at work surface, which produces more heat and improve machining. Which of the following is a conventional process of machining? d) None of the mentioned The laser beam is focused through the focal lens. A method for laser beam machining of a workpiece in which a laser beam is focused by an objective, into or onto the workpiece having a boundary surface, to produce a machining effect by a two-photon process, and the position of the focal point with respect to the workpiece is shifted. It shows the image into bigger size so that it will be easy to perform operation on the given work piece mark. The high power radiation of laser gives rise to high temperature on a small area of work piece. Heat treated and magnetic materials can be welded, without losing their properties. Thus these two processes are often classified as electro-optical-thermal processes. Soft materials like rubber, plastic can be machined. Focusing of Laser Beams The focal length of lens is about the distance from the position of focal lens to the focal spot. And moreover do not forget to share the article on your favorite social platform. Also called "burning stabilized laser gas cutting", "flame cutting". Time of cutting in laser beam machining process increases. Laser Beam Machining Advantage: The following advantages of laser beam … A coaxial gas flow "blows" the melt downwards and creates a kerf in the process. a) Deflect laser beams Tolerances and surface finish Which one of the following processes would be appropriate for cutting a hole of 0.003 inch diameter through a plate of aluminum that is 1/16 in thick: (a) abrasive jet machining, (b) chemical milling, (c) EDM, (d) laser beam machining, (e) oxyfuel cutting, (f) water jet cutting, and (g) wire EDM? It is a non-conventional machining process in which no tool is used. 3.3 Switching time of the TAG lens The ability to switch rapidly between two distinct inten-sity distributions is a key parameter in evaluating the rel-evance of a beam shaping strategy for micromachining or laser marking purposes. b) Smaller The laser beam heats and melts the edges of the workpiece, forming a joint. C) there are rust spots and oil spots on the surface of the board: Effect of sheet type and sheet quality on laser cutting quality In this machining process metal is removed by melting and vaporization of metal particle from surface of work piece. Advanced Machining Process - Mechanical Engineering (MCQ) questions and answers Home >> Category >> Mechanical Engineering (MCQ) questions and answers >> Advanced Machining Process 1) The Laser Beam Machining process can be carried out, when the media for energy transfer between tool and workpiece is The laser beam is concentrated to the smallest size at this "spot". View Answer, 5. The heat produced in the small area where the laser beam strikes can melt almost any of the known materials. Sanfoundry Global Education & Learning Series – Manufacturing Engineering. 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