Pdf multiresponses optimization of ultrasonic machining. Nptel mechanical engineering video lecture online study. 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. The torch produces a highvelocity jet of hightemperature ionized gas called plasma that cuts by melting and. The electrolyte in ecm should have high electrical conductivity, low viscosity, high specific heat, chemical stability, resistance to form a passivating film on the workpiece surface, non. Particularly suited for very hard andorbrittle materials such asgraphite, glass, carbide, and ceramics. Nptel provides elearning through online web and video courses. Unit ii mechanical energy based processes 10 abrasive jet machining water jet machining abrasive water jet machining ultrasonic machining. Note that there is an optimum cutting speed for both cost and time, respectively.
Manufacturing processes i nptel online videos, courses. It is also known as ultrasonic impact grinding is an operation that involves a vibrating tool fluctuating the ultrasonic frequencies in order to. Ultrasonic machining usm and waterjet machining wjm are typical examples of single action, mechanical non traditional machining processes. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. Air, nitrogen and carbon dioxide to propel the abrasive particles. Mechanical engineering manufacturing processes ii nptel. Apr 15, 20 ultrasonic machining introduction ultrasonic machining is a nontraditionalmechanical means of uniform stock materialremoval processit is applicable to both conductive andnonconductive materials. Ultrasonic machining is a mechanical type nontraditional machining process. 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.
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. Jun 10, 2017 electro chemical machining consists of following basic elements. Mechanism analysis of ultrasonic machining based on finite. Mechanics of ultrasonic machining usm effect of process parameters of usm ultrasonic machining unit electrochemical machining processes ecm. 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. The machining medium is solid grains suspended in an abrasive slurry in the former,while a fluid is employed in the wjm process. The range between the two optimum speeds is known as the highef. Classification of metal removal processes and machine tools. Paul,department of mechanical engineering, iit kharagpur.
Singh, balbir singh modern machining processes presents unconventional machining methods which are gradually commercial acceptance. Learn for free, pay a small fee for exam and get a certificate. All aspects of mechanical, electrochemical and thermal processes are comprehensively covered. So, due to this, edm is particularly useful in machining of small holes, orifices, slots in diesel fuel injection nozzles, airbrake valves and aircraft engines etc. I the machining medium is solid grains suspended in an abrasive slurry. Schematic of ultrasonic machine tool usm is primarily targeted for the machining of hard and brittle materials dielectric or.
Oct 22, 2008 lecture series on manufacturing processes ii by prof. The present work deals with multiresponses optimization of ultrasonic machining process using the imperialist competitive algorithm ica. 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. Basic working principle, configuration, specification. In the process of the ultrasonic machining, the machining efficiency is affected directly by material removal rate. Mechanical machining i jet machining and ultrasonic machining usm are typical examples of single action, mechanical non traditional machining processes.
Download link is provided and students can download the anna university me6004 unconventional machining processes ump syllabus question bank lecture notes syllabus part a 2 marks with answers part b 16 marks question bank with answer, all the materials are listed below for the students to make use of it and score good maximum marks with our study materials. In order to meet these challenges, a number of newer material. Even the more sophisticated methods require a visual test to be performed. Part 2 deals with thermal machining processes for example, electric discharge machining, laser beam machining, electron beam machining, etc. Ultrasonic machining, water jet machining, abrasive water jet machining. Usm is a versatile machining process as far as properties of materials are concerned. Nptel provides elearning through online web and video courses various streams. Nocnon traditional abrasive machining processes ultrasonic, abrasive. 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. 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.
Gas may be supplied either from a compressor or a cylinder. In ultrasonic machining, tool of desired shape vibrates at ultrasonic frequency 19. Unconventional machining process need classification brief overview. Instructional objectives i manufacturing process ii. Here, the process inputs were tool material, grit size.
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. Abrasives gas propulsion system supplies clean and dry air. Nptel mechanical engineering advanced machining processes. 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. The overall investment of underground machine hall is less than those of the superstructure of a surface power house of similar dimensions.
Introduction to nontraditional machining iit kanpur. Introduction plasmaarc machining pam employs a highvelocity jet of hightemperature gas to melt and displace material in its path. Metal casting processes indian institute of technology guwahati. Nptel mechanical engineering video lecture online study material. Ultrasonic machining national institute of technology. Ultrasonic machining introduction ultrasonic machining is a nontraditionalmechanical means of uniform stock materialremoval processit is applicable to both conductive andnonconductive materials. Mar 11, 2016 applications of electric discharge machining process. In the paper, the material structure deformation under abrasive impacting is simulated by the lsdyna3d software, and the stresses occurring are analyzed numerically.
The introduction of abrasives to the fluid jet enhances the. Plasma arc machining process, diagram, advantages and. Module 3 selection of manufacturing processes nptel. Metal casting is a labour intensive process automation. Non traditional abrasive machining processes ultrasonic, abrasive jet and abrasive water jet. 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. 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. These methods form a group of processes which removes excess material by. Nptel, online courses and certification, learn for free. Mechanical measurements and metrology nptel online videos.
The machining medium is solid particles suspended in abrasive media abrasive slurry in the former while high pressure fluid jet is employed in latter. Non traditional abrasive machining processes ultrasonic, abrasive jet and. Lecture series on manufacturing processes ii by prof. Ultrasonic machining usm and waterjet machining wjm are typical. In electro chemical machining an electrolyte acts as a current carrier. 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. In ultrasonic machining usm and water jet machining wjm machining, material removal occurs due to mechanicalabrasion ma action.