Part 2 deals with thermal machining processes for example, electric discharge machining, laser beam machining, electron beam machining, etc. Unlike other nontraditional processes such as laser beam, and electrical discharge machining, etc. Department of mechanical engineering, iit delhi, delhi, india. 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. Ultrasonic machining introduction ultrasonic machining is a nontraditionalmechanical means of uniform stock materialremoval processit is applicable to both conductive andnonconductive materials. 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. The two electrodes workpiece and tool is immersed in an electrolyte such as nacl. 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. In order to meet these challenges, a number of newer material. Ultrasonic machining national institute of technology. Ultrasonic machining introduction ultrasonic machining is a. Product requirement i complex shapes i machining in inaccessible areas i low tolerances say, 0. Mechanical machining ultrasonic machining usm and waterjet machining wjm are typical examples of single action, mechanical non traditional machining processes. Working principles equipment used process parameters mrrvariation in techniques used applications.
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. Discrete level measurement techniques liquid vapor detection lvd types of devices. 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. It is employed to machine hard and brittle materials both electrically conductive and.
The lens focuses light onto the retina, which contains very many lightsensitive receptor cells called rods and cones that operate using a photochemical process to convert incident light into nerve impulses. Understand of fundamentals of the nontraditional machining methods and industrial applications. Download that books into available format 2019 update. The ultrasonic machining usm process is normally employed for hard andor. 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.
Lecture 15 water jet and abrasive water jet machining lecture 16 ultrasonic machining process usm lecture 17 mechanism, processes variants and applications of usm lecture 18 micro usm and advances in usm lecture 19 electric discharge machining edm process lecture 20 diesinker edm and wire cut electric discharge machining wedm. Working principles equipment used process parameters. On this channel you can get education and knowledge for general issues and topics. 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. Identify and utilize fundamentals of metal cutting as applied to machining. 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. I high surface nish nanolevel ra value i miniaturization of products examples. 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. Manufacturing process technology ii dvd media storage type. 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. 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.
Ultrasonic machining is nontraditional machining process which is used to machine brittle and hard material. An introduction to ndt common methods 5 this process is called accommodation and gives us very fast continuous focusing adjustment. Laserassisted machining is one of the important and most widely used category of the heatassisted hmps. Usm is a versatile machining process as far as properties of materials are concerned. To reduce or eliminate these problems, surface grinding of cfrp composites using rotary ultrasonic machining rum has been conducted. Today we will learn about ultrasonic machining, principle, working, equipments, application, advantages and disadvantages with its diagram. Ultrasonic machining is a mechanical type nontraditional machining process. Plasma arc machining process pdf 10 plasma arc machining. High speed machining hsm seminar and ppt with pdf report. 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. 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.
This machining process comes into existence in 1950 for finishing edm surface. 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. The machining medium is solid grains suspended in an abrasive slurry in the former,while a fluid is employed in the wjm process. This group includes chemical milling, photochemical machining, and thermo chemical machining. Chemical machining for some special purposes can also be achieved by using a jet of reactive gas, e.
Pdf while making a part from raw material, one may require bulk removal of material. 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. This chapter presents usm and rotary ultrasonic machining rum, including. Plasma arc machining pdf plasma arc machining pdf plasma arc machining pdf. Ultrasonic machining is a mechanical material removal process that uses formed tools, vibration of high frequency and abrasive slurry mix. Mechanical engineering n p t e l national programme on. Chemical machining 632014 hareesha n g, dept of aero engg, dsce 2 3. Usm is mechanical material removal process or an abrasive process used to erode holes or. Edge trimming of cfrp composites using rotary ultrasonic. 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. Mechanical engineering manufacturing processes ii nptel.
Introduction to nontraditional machining iit kanpur. Electrochemical machining ecm is a machining process in which electrochemical process is used to remove materials from the workpiece. Compare conventional and nonconventional machining and analyze the different elements of ultrasonic machining and its applications. The use of abrasives to shape parts is probably the oldest material removal process. 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. Ultrasonic refers to waves of high frequency above the audible range of 20 khz. 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. Schematic of ultrasonic machine tool usm is primarily targeted for the machining of hard and brittle materials dielectric or. The chemical machining processes include those wherein material removal is accomplished by a chemical reaction, sometimes assisted by electrical or thermal energy applications. Shantanu bhattacharya nptel coordinating institute.
Lecture notes institute of aeronautical engineering. Abrasive machining involves material removal by the action of hard, abrasive particles. Effect of tool design parameters study in micro rotary ultrasonic. Paul,department of mechanical engineering, iit kharagpur. The ultrasonic technology from dmg mori enables the economical machining of complex workpiece geometries in demanding hightech materials like e. Part 2 deals with thermal machining processes for example, electric discharge machining, laser beam machining, electron beam machining. Ultrasonic machining usm is a nontraditional mechanical machining process and can be used in many applications. Machining variables play dominant roles in such a process. Mechanics of ultrasonic machining usm effect of process parameters of usm ultrasonic machining unit electrochemical machining processes ecm. Lecture series on manufacturing processes ii by prof. It also includes micronanofinishing processes viz, abrasive flow finishing, magnetic abrasive finishing, etc.
In the process, workpiece is taken as anode and tool is taken as cathode. Specomponents when they are still in the green state, i. Plasma arc machining or laser beam machining is that which is the last point. References module 9 nonconventional machining iit kharagpur. Ultrasonic machining, water jet machining, abrasive water jet machining. The tool travels vertically or orthogonal to the surface of the part at amplitudes of 0. I high mrr i high production rate while processing di cult to machine. Particularly suited for very hard andorbrittle materials such asgraphite, glass, carbide, and. Nptel provides elearning through online web and video courses.
Lecture notes on modern manufacturing process dr pramod. Basic working principle, configuration, specification. Ultrasonic level measurement signal travels at sound speed. Chemical milling sometimes called chem milling or contour machining or etching. This is known as gaseous chemical machining or hot chlorine machining and can be used for deburring of metal parts.