Processing capabilities of micro ultrasonic machining for. Rotary ultrasonic machining rum is a mechanical type nontraditional hybrid machining process which has been utilized potentially to machine a wide range of latest and difficulttomachine. Ultrasonic machining is one of the types of nontraditional machining methods which produces circular, noncircular holes of very small size is usm process parameters introduction ultrasonic machining is a nontraditional machining process. An overview of ultrasonic machining and applications. At such high frequencies it is very difficult for a sound wave to.
It also provides schematic representations of the components used in rotary usm and ultrasonic impact grinding. At that time, this drilling process was used only for machining of wood materials. Material removal processes machining is the broad term used to describe removal of. Ultrasonic machining is an abrasive process which can create any material into hard and brittle form with the help of its vibrating tool and the indirect passage of abrasive particles towards the work piece.
Ultrasonic machining is a mechanical type nontraditional machining process. 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. Ultrasonic machining usm and waterjet machining wjm are typical examples of single action, mechanical non traditional machining processes. By adding a rotating ultrasonic transducer to the old version of rum the. Ultrasonic machining usm is the removal of material by the abrading action of gritloaded liquid slurry circulating between the workpiece and a tool vibrating perpendicular. Ultrasonic machining introduction ultrasonic machining is a nontraditionalmechanical means of uniform stock materialremoval processit is applicable to both conductive andnonconductive materials. Ultrasonic machining wikimili, the free encyclopedia. Ultrasonic machining is one of the types of nontraditional machining methods which produces circular, noncircular holes of very small size is ultrasonic machining method. In micro usm workpiece which is placed on the workpiece table vibrates at ultrasonic frequency 40 khz. In the present paper, an experimental study of the ultrasonicbased depassivation process and its benefits related to an ecm proces are presented and discussed. Ultrasonic machining usm is of particularly interest for the machining of conductive, nonconductive, brittle materials such as engineering ceramics. Usm is mechanical material removal process or an abrasive process used to erode.
Ultrasonic machining article about ultrasonic machining. Ultrasonic machining abrasive vibrations jet cutting high pressure jet edm tool chemical machining shield fluid ecm. Ultrasonic machining centers take your machining capabilities to the next level, along with your bottom line, with optisonic. Non traditional machining ntm processes are characterised as follows. Schematic of ultrasonic machine tool usm is primarily targeted for the machining of hard and brittle materials dielectric or.
Usm is grouped under the mechanical group ntm processes. Abrasive jet machining water jet machining abrasive water jet machining ultrasonic machining. Introduction micro ultrasonic machining micro usm, is one of the efficient material removal processes especially suitable for the micromachining of hard and brittle materials. Pdf process characteristics in ultrasonic machining. This chapter presents usm and rotary ultrasonic machining rum, including definitions, machine elements, input variables and their effects, applications, and advantages and disadvantages. When very frequency vibrations are applied on to the tool, the tool is vibrating at a very high frequency. Me6004 unconventional machining processes ump syllabus. The process was first developed in 1950s and was originally used for finishing edm surfaces. A machining process is called nontraditional if its material removal mechanism is basically different than those in the traditional processes, i. It is employed to machine hard and brittle materials both electrically. As the diagram showing the first is connected to the power. High speed machining hsm seminar and ppt with pdf report.
Ultrasonic refers to waves of high frequency above the audible range of 20 khz. Particularly suited for very hard andorbrittle materials such asgraphite, glass, carbide, and. In ultrasonic machining, a tool vibrating longitudinally at 20 khz to 30 khz with an amplitude between 0. Parametric optimization of ultrasonic machining process using gravitational search and fireworks algorithms. Usm ultrasonic machining edm electric discharge machining ecm electro chemical machining laser machining. Traditional machining processes consist of turning, boring, drilling, reaming, threading, milling, shaping, planing, and broaching, as well as abrasive processes such as grinding, ultrasonic machining, lapping, and honing. The term sonic is applied to ultrasound waves of very high amplitudes. Experience unprecedented machining efficiency with high performance ultrasonic milling, grinding, core drilling and lightweighting of optical glasses and ceramics. Material removal processes machining is the broad term used to describe removal of material from a workpiece includes cutting, abrasive processes grinding, advanced machining processes electrical, chemical, thermal, hydrodynamic, lasers automation began when lathes were introduced in 1700s. Ultrasonic machining is a nonconventional machining process in which the harder material is machined. By 1954, the machine tools, using the ultrasonic principle, had been designed and constructed. The introduction of abrasives to the fluid jet enhances the. In this process abrasives contained in the slurry are driven against the work by a tool oscillating. Precision abrasive processes are commonly employed to machine glasses, single crystals and ceramic materials for various industrial applications.
Ultrasonic machining is an abrasive process which can create any material into hard and brittle form with the help of its vibrating tool and the indirect passage of. Pdf experimental study of micro ultrasonic machining. Ultrasonics, vibrations of frequencies greater than the upper limit of the audible range for humansthat is, greater than about 20 kilohertz. Ultrasonic machining process usm is purely depends on the work material properties mainly hardness, fracture toughness, tool properties, abrasive properties. As the tool vibrates with a specific frequency, an abrasive slurry, usually a mixture of abrasive grains and water of definite proportion 20% 30%, is made to flow. The use of ultrasonics in machining was first proposed by l. It is employed to machine hard and brittle materials both electrically conductive and non conductive material having hardness usually greater than 40 hrc. Ultrasonic machining is a nontraditional machining process. These techniques are used for high precision machining application and for nonbrittle materials and dif. Abrasive slurry is injected on the top of the workpiece. Ultrasonic machining is a mechanical material removal process that uses formed tools, vibration of high frequency and abrasive slurry mix.
Pdf ultrasonic machining is the oldest form of machining process which can be used to machine brittle materials such as glass and ceramics. Principle of ultrasonic machining in the process of ultrasonic machining, material is removed by microchipping or erosion with abrasive particles. Ultrasonic machining is nontraditional machining process which is used to machine brittle and hard material. This section deals with two commonly used mamp, viz. The machining operation is simple and requires less time. Unconventional machining process need classification brief overview. Ultrasonic enhancement of an electrochemical machining. A comparative study on ultrasonic machining of hard and. Ultrasonic machining usm and ultrasonic machining tool.
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. This process is used for drilling both circular and noncircular holes in very hard materials like carbide, ceramics, etc. On this channel you can get education and knowledge for general issues and topics. This machining process comes into existence in 1950 for finishing edm surface. Basics of ecm process electrochemical machining ecm for conductive. Ultrasonic machining usm main parts, working principle. Sumit thakur mechanical ultrasonic machining ppt with pdf seminar report. To starts, the machining process power is required. Ultrasonic machining usm is a nonconventional mechanical material removal process generally associated with low material removal rates, however its application is not limited by the electrical or chemical characteristics of. Parametric optimization of ptfe using ultrasonic 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. This article lists the major ultrasonic components that are similar to both rotary usm and ultrasonic impact grinding. The ultrasonic machining usm process consists of two methods, namely, ultrasonic impact grinding and rotary usm.
Making a bladeless wooden fan scrapwood challenge ep38 duration. Advanced processes include electrical and chemical means of material removal, as well as the use of abrasive jets, water. Hypersound, sometimes called praetersound or microsound, is sound waves of frequencies greater than 10 hertz. In usm process, the tool, made of softer material than that of the workpiece, is oscillated by the booster and sonotrode at a frequency of about 20 khz with an amplitude of about 25. Ultrasonic machining is a nontraditional process, in which abrasives contained in a. Mechanicaltype advanced machining processes mamp are of various types, as shown in figure 11. Ultrasonic machining usm is a nontraditional mechanical machining process and can be used in many applications. The machining medium is solid grains suspended in an abrasive slurry in the former,while a fluid is employed in the wjm process. Ultrasonic machining usm is a mechanical material removal process used to erode holes and cavities in hard or brittle workpieces by using shaped tools, highfrequency mechanical motion, and an abrasive slurry. Today we will learn about ultrasonic machining, principle, working, equipments, application, advantages and disadvantages with its diagram.
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