Particularly suited for very hard andorbrittle materials such asgraphite, glass, carbide, and ceramics. Ultrasonic machining introduction ultrasonic machining is a nontraditionalmechanical means of uniform stock materialremoval processit is applicable to both. Ppt laser beam machining lbm powerpoint presentation. Slicing, coining, dicing, lapping, engraving, deburring, broaching, boring and trepanning operations are also practical. Ultrasonic machining is a contemporary manufacturing method usually employed for processing materials with higher hardnessbrittleness such as quartz, semiconductor materials, ceramics. Ultrasonic horn design for ultrasonic machining technologies. Chemical milling sometimes called chem milling or contour machining or etching. It also includes micronanofinishing processes viz, abrasive flow finishing, magnetic abrasive finishing, etc. 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. Material removal processes machining is the broad term used to describe removal of material from a workpiece includes cutting, abrasive processes grinding, advanced machining. 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. Oct 22, 2008 lecture series on manufacturing processes ii by prof. Applied and computationalmechanics4 2010 7988 ultrasonic horn design for ultrasonic machining technologies m. Ultrasonic machining is a nontraditional process, in which abrasives contained in a slurry are driven.
Ultrasonic machining introduction ultrasonic machining is a. The vibration exciter, a magnetostrictive transducer 1, is fixed to the body 2 of the acoustic head using the shoulder 3 and the thin walled cup 4. Introduction plasmaarc machining pam employs a highvelocity jet of hightemperature gas to melt and displace material in its path. Ultrasonic machining offers a solution to the expanding need for machining brittle materials such as single crystals, glasses and. Singh, balbir singh modern machining processes presents unconventional machining methods which are gradually. 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 of particular interest for the cutting of nonconductive, brittle workpiece materials such as engineering ceramics.
Download nontraditional manufacturing processes by gary f. In the paper, the material structure deformation under abrasive. 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. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. The torch produces a highvelocity jet of hightemperature ionized gas called plasma that cuts by melting and. The impact of free abrasive particles on the work surface. Machined surfaces are stress and burr free having good surface finish 5. Ultrasonic machining usm and waterjet machining wjm are typical examples of. 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. Mechanical machining ultrasonic machining usm and waterjet machining wjm are typical examples of single action, mechanical non traditional machining processes. Ultrasonic machining, water jet machining, abrasive water jet machining.
Jun 03, 2014 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. It is also known as ultrasonic impact grinding is an operation that involves a vibrating tool fluctuating the ultrasonic frequencies in order to remove. It is done by selective or overall removal of material by a controlled chemical. It includes detailed information to gain insight into the manufacturing processes. 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. 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. Apr 15, 20 ultrasonic machining introduction ultrasonic machining is a nontraditionalmechanical means of uniform stock materialremoval processit is applicable to both conductive andnonconductive materials. Basic mechanical engineering covers a wide range of topics and engineering concepts that are required to be learnt as in any undergraduate engineering course. Introduction to nontraditional machining iit kanpur. 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.
Wallace says the typical use of this machine would be conventional metalcutting most of the. Ultrasonic machining usm is the removal of material by the abrading action of gritloaded liquid slurry circulating between the workpiece and a. This chapter presents usm and rotary ultrasonic machining rum, including definitions, machine elements, input variables and their effects, applications, and advantages and disadvantages. Nptel video lecture topics for mechanical engineering new no.
Parts are burr free with no residual stresses or thermal effects. Chemical machining for some special purposes can also be achieved by using a jet of reactive gas, e. Schematic of ultrasonic machine tool usm is primarily targeted for the machining of hard and brittle materials dielectric or. Paul,department of mechanical engineering, iit kharagpur. Even the more sophisticated methods require a visual test to be performed. Smart material, adaptive structures and intelligent mechanical systems iitk. Unit ii mechanical energy based processes 10 abrasive jet machining water jet machining abrasive water jet machining ultrasonic machining. Material removal processes categories of machining cutting involve single or multipoint cutting tools and processes turning, boring, drilling, tapping, milling. This is known as gaseous chemical machining or hot chlorine machining and can be used for deburring of metal parts. Chemical machining working principle, application, advantages. Machining a material removal process in which a sharp cutting tool is used to mechanically cut away material so that the desired part geometry remains most common application. Called pam, this is a method of cutting metal with a plasmaarc, or tungsten inertgasarc, torch.
For the love of physics walter lewin may 16, 2011 duration. 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. Part 2 deals with thermal machining processes for example, electric discharge machining, laser beam machining, electron beam machining, etc. References module 9 nonconventional machining iit kharagpur. Ultrasonic machining,direct impact,abrasive grains,material removal rate.
Unconventional machining process need classification brief overview. Hot sale 500w mini ultrasonic spot welding machine, hand held spot welder duration. Ultrasonic machining usm is a nontraditional mechanical machining process and can be used in many applications. The ultrasonic vibrations are transmitted directly on cutting tools, respectively directly to a cutting process. In the paper, the material structure deformation under abrasive impacting is simulated by the lsdyna3d software, and the stresses occurring are analyzed numerically.
Singh, balbir singh modern machining processes presents unconventional machining methods which are gradually commercial acceptance. It yields low scrap, almost automatic operation, low overall machining time, and reduced inventory expenses. Usm is a versatile machining process as far as properties of materials are concerned. Unlike other nontraditional processes such as laser beam, and electrical discharge machining, etc. The conventional hydroelectric power stations are usually located overground at the foot of a dam or a hill slope on the banks of a river. It is employed to machine hard and brittle materials both electrically conductive and.
In the process of the ultrasonic machining, the machining efficiency is affected directly by material removal rate. Manufacturing processes i nptel online videos, courses. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. Miyan ram 1709653 1 introduction ultrasonic machining usm is the removal of hard and brittle materials using an axially oscillating tool at. Ultrasonic technology poised for advance into general machining.
An introduction to ndt common methods 5 this process is called accommodation and gives us very fast continuous focusing. 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. Ultrasonic machining basic terms and working youtube. Wallace says the typical use of this machine would be conventional metalcutting most of the time, with the ultrasonic head loaded into the spindle for the parts and operations benefitting most from this capability. An introduction to ndt common methods 3 section 2 visual and optical testing visual testing is the most widely used method of nondestructive testing ndt.
Burr free holes and slots in hard, brittle materials. Jain coordinating institute iit kanpur subtitles available unavailable lecture lecture lecture lecture lecture lecture lecture lecture lecture. Ultrasonic machining is a mechanical type nontraditional machining process. All aspects of mechanical, electrochemical and thermal processes are comprehensively covered. Our new crystalgraphics chart and diagram slides for powerpoint is a collection of over impressively designed datadriven chart and editable diagram s guaranteed to impress any audience. The machined surface produced by ultrasonic machining is found to be free from any surface defects heat affected zone, cracks, recast layer, etc. The use of ultrasonic for machining processes of hard and brittle. Unlike other nontraditional processes such as laser. Ultrasonic technology poised for advance into general. 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. The machining medium is solid grains suspended in an abrasive slurry in the former,while a fluid is employed in the wjm process.
A comparative study on ultrasonic machining of hard and. Ultrasonic machining from the technology data exchange linked to trusted tde listed vendors. Pdf nontraditional manufacturing processes by gary f. The ultrasonic machining center is also a fully capable conventional machining center. There is no thermal damage and burr free surface can be produced. Nptel video lecture topic list created by linuxpert systems, chennai nptel video course mechanical engineering advanced machining processes subject coordinator prof. The overall investment of underground machine hall is less than those of the superstructure of a surface power house of similar dimensions. Study of parameters of ultrasonic machining ethesis. Mechanism analysis of ultrasonic machining based on finite. Lecture series on manufacturing processes ii by prof. The most important is labelled ultrasonic machining, by which is meant conventional ultrasonic machining, that is, the use of hammeraction tools with abrasive for cutting brittle materials. Chemical machining is the material removal process for the production of desired shapes and dimensions. Ultrasonic machining national institute of technology. Photochemical machining suron precision technology.
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