Understand of fundamentals of the nontraditional machining methods and industrial applications. Mechanics of ultrasonic machining usm effect of process parameters of usm ultrasonic machining unit electrochemical machining processes ecm. The machining medium is solid grains suspended in an abrasive slurry in the former,while a fluid is employed in the wjm process. Plasma arc machining pdf plasma arc machining pdf plasma arc machining pdf. Product requirement i complex shapes i machining in inaccessible areas i low tolerances say, 0. Ultrasonic machining introduction ultrasonic machining is a. Principle of ultrasonic machining during one strike, the tool moves down from its most upper remote position with a starting speed at zero, then it speeds up to finally.
Working principles equipment used process parameters. Ultrasonic machining, or strictly speaking the ultrasonic vibration machining, is a subtraction manufacturing process that removes material from the surface of a part through high frequency, low amplitude vibrations of a tool against the material surface in the presence of fine abrasive particles. Ultrasonic refers to waves of high frequency above the audible range of 20 khz. References module 9 nonconventional machining iit kharagpur. Identify and utilize fundamentals of metal cutting as applied to machining. These methods form a group of processes which removes excess material by. It is known that the lattice distances between two atoms are of the order of 0. Advanced machining processes video course course outline there is a need for machine tools and processes which can accurately and easily machine the most difficultto machine materials and workpieces with intricate and accurate shapes. Water jet and abrasive water jet machining youtube. Lecture notes on modern manufacturing process dr pramod. The chemical machining processes include those wherein material removal is accomplished by a chemical reaction, sometimes assisted by electrical or thermal energy applications. This machining process comes into existence in 1950 for finishing edm surface. Working principles equipment used process parameters mrrvariation in techniques used applications. It also includes micronanofinishing processes viz, abrasive flow finishing, magnetic abrasive finishing, etc.
Principle of ultrasonic machining 1 this is the standard mechanism used in most of the universal ultrasonic machines 632014 hareesha n g, dept of aero engg, dsce 11 12. In the process, workpiece is taken as anode and tool is taken as cathode. Today we will learn about ultrasonic machining, principle, working, equipments, application, advantages and disadvantages with its diagram. Plasma arc machining process pdf 10 plasma arc machining. Ultrasonic level measurement signal travels at sound speed. Download that books into available format 2019 update. Compare conventional and nonconventional machining and analyze the different elements of ultrasonic machining and its applications. It is also known as ultrasonic impact grinding is an operation that involves a vibrating tool fluctuating the ultrasonic frequencies in order to remove the material from the work piece. Ultrasonic machining introduction ultrasonic machining is a nontraditionalmechanical means of uniform stock materialremoval processit is applicable to both conductive andnonconductive materials. Manufacturing process technology ii dvd media storage type. Nontraditional manufacturing processes is defined as a group of processes that remove excess material by various techniques involving mechanical, thermal, electrical or chemical energy or combinations of these energies but do not use a sharp cutting tools as it needs to be. Unlike other nontraditional processes such as laser beam, and electrical discharge machining, etc.
Ultrasonic machining national institute of technology. Machining variables play dominant roles in such a process. Ultrasonic machining is a mechanical material removal process that uses formed tools, vibration of high frequency and abrasive slurry mix. I high surface nish nanolevel ra value i miniaturization of products examples. Basic working principle, configuration, specification. The two electrodes workpiece and tool is immersed in an electrolyte such as nacl. Effect of tool design parameters study in micro rotary ultrasonic. Department of mechanical engineering, iit delhi, delhi, india. 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 this process abrasives contained in the slurry are driven against the work by a tool oscillating at low amplitude 25100 microns and high frequency 1530 khz. Precision machining technology pi ceramic uses machining techniques from the semiconductor industry to machine the sensitive piezoceramic elements with a ceramic parts particularly high degree of precision. In order to meet these challenges, a number of newer material. Mechanical machining ultrasonic machining usm and waterjet machining wjm are typical examples of single action, mechanical non traditional machining processes. Specomponents when they are still in the green state, i. Nptel syllabus advanced manufacturing processes web course course outline the course covers the details of the advanced machining theory and practices, advanced machining processes, advanced metal forming processes, advanced welding. Classification of metal removal processes and machine tools. Usm is mechanical material removal process or an abrasive process used to erode holes or. Shantanu bhattacharya nptel coordinating institute. Ultrasonic machining is of particular interest for the cutting of nonconductive, brittle workpiece materials such as engineering ceramics. Ultrasonic machining usm and waterjet machining wjm are typical examples of single action, mechanical non traditional machining processes. An introduction to ndt common methods 5 this process is called accommodation and gives us very fast continuous focusing adjustment. The ultrasonic machining usm process is normally employed for hard andor. This chapter presents usm and rotary ultrasonic machining rum, including.
Part 2 deals with thermal machining processes for example, electric discharge machining, laser beam machining, electron beam machining, etc. Particularly suited for very hard andorbrittle materials such asgraphite, glass, carbide, and. High speed machining hsm seminar and ppt with pdf report. Pdf while making a part from raw material, one may require bulk removal of material. Nptel provides elearning through online web and video courses. Ultrasonic machining is a mechanical type nontraditional machining process. The tool travels vertically or orthogonal to the surface of the part at amplitudes of 0. Laserassisted machining is one of the important and most widely used category of the heatassisted hmps.
Chemical machining for some special purposes can also be achieved by using a jet of reactive gas, e. Miyan ram 1709653 1 introduction ultrasonic machining usm is the removal of hard and brittle materials using an axially oscillating tool at ultrasonic frequencies 1820 khz during that oscillation, the abrasive slurry of b4c or sic is continuously fed into the machining zone between a soft tool brass or steel and the workpiece. The ultrasonic technology from dmg mori enables the economical machining of complex workpiece geometries in demanding hightech materials like e. Lecture notes institute of aeronautical engineering. Electrochemical machining ecm is a machining process in which electrochemical process is used to remove materials from the workpiece.
Schematic of ultrasonic machine tool usm is primarily targeted for the machining of hard and brittle materials dielectric or conductive such as boron carbide, ceramics, titanium carbides, rubies, quartz etc. On this channel you can get education and knowledge for general issues and topics. Ultrasonic machining, water jet machining, abrasive water jet machining. I high mrr i high production rate while processing di cult to machine. Ultraprecision machining refers to the ultimate ability of a manufacturing process wherein processing of a material at its lowest scale that is, at the atomic scale, is achieved. Introduction to nontraditional machining iit kanpur. Abrasive machining involves material removal by the action of hard, abrasive particles. Ultrasonic machining usm is a nontraditional mechanical machining process and can be used in many applications. Edge trimming of cfrp composites using rotary ultrasonic. The use of abrasives to shape parts is probably the oldest material removal process. Mechanical engineering n p t e l national programme on. Paul,department of mechanical engineering, iit kharagpur. Schematic of ultrasonic machine tool usm is primarily targeted for the machining of hard and brittle materials dielectric or. Lecture series on manufacturing processes ii by prof.
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. They are important because introduction they can be used on all types of materials ranging from soft metals to hardened steels and hard nonmetallic materials such as. Chemical milling sometimes called chem milling or contour machining or etching. Chemical machining 632014 hareesha n g, dept of aero engg, dsce 2 3. Part 2 deals with thermal machining processes for example, electric discharge machining, laser beam machining, electron beam machining. Plasma arc machining or laser beam machining is that which is the last point. It is employed to machine hard and brittle materials both electrically conductive and.
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