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