We are here to provides you the best study notes from best coaching like made easy, ace academy etc and lecture notes from best institutions like mit open course, iit nptel, crec tirupati, washington, middle east technical university etc. The conventional machining process involved tool wearing as there is physical contact between the tool and the work piece. The processes that have this common theme, controlled material removal, are today collectively known as subtractive manufacturing, in distinction from processes of controlled material addition, which are known as additive manufacturing. I rapid improvements in the properties of materials hardness. Materials removed from the workpiece stay in the electrolyte fluid. To define the fundamental parameters of a system, let us consider a linear twoport system with two terminals grounded, as the one shown in. Lbm process has already been discussed in details in previous chapter 4. Thus, lbm can be adapted with automation, and n laser beam machining provides a wide range of material processing techniques ranging from drilling, cutting, grooving, scribing, marking, cleaning and turning etc. Plasma arc machining process pdf plasma arc machining process pdf download. Pam employs a highvelocity jet of hightemperature gas to melt and displace material in its. Non traditional abrasive machining processes ultrasonic, abrasive jet abrasive.
Vibration assisted grinding is a rather new technology where a superposition of conventional grinding and a vibration most often in the ultrasonic range is. Summary electron beam machining is one of the non conventional machining under thermal process category. A mechanical conventional single cutting or ma action process can be combined with the respective machining phases of electrodischarge ed in electrodischarge machining edm or ecd in ecm. Note for unconventional machining process ump lecture notes, notes, pdf free download, engineering notes, university notes, best pdf notes, semester, sem, year. Hybrid machining processes hybrid production manufacturing means the combination of processesmachines in order to produce parts in a more efficient and productive way. Nptel provides elearning through online web and video courses various streams. On this channel you can get education and knowledge for general issues and topics. Introduction to abrasive machining and finishing processes. The lectures would introduce the basic principles of material removal by impact erosion by use of abrasives against hard and brittle materials. Electrochemical grinding is a process that removes electrically conductive material by grinding with a negatively charged abrasive grinding wheel, an electrolyte fluid, and a positively charged workpiece. Difference between conventional and nonconventional.
Jagadeesha t, assistant professor, national institute of technology, calicut. This course will define the areas of application of non traditional abrasive machining processes in the manufacturing industry. In this family of hybrid machining processes, the major material removal phase is either cd or ecd. Objective of presentation at the end of this presentation, audience will be aware of merits of non conventional machining processes over their traditional counterparts. The principle of this method is using high velocity electron beams to induce melting and rapid vaporization of material. One of the first steps in this strategy was the introduction of the hybrid electric vehicle hev, which possesses the advantages of both conventional and electric vehicles evs 1, 2. Conventional and non conventional machining processes. Non traditional machining processes s5me complied by. Introduction electron beam machining is one of the examples of non conventional machining under the thermal process category, along with laser beam machining, electric discharge machining, and.
I tool material hardness should be greater than workpiece hardness. 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. The physical parameters of non conventional machining processes have a direct. Unconventional machining processes, modern machining processes, and.
Advanced machining processes course nptel online courses. Ultrasonic machining usm and waterjet machining wjm are typical examples of single action, mechanical non traditional machining processes. Note unconventional machining process ump by jntu hero. Hybrid machining processes in cutting technology fraunhofer. In the above overview on hybrid processes the processes presented in this brochure are written in blue letters. Lecture 27 hybrid welding, residual stress and distortion lecture 28 cooling and solidification at different casting processes. The following examples are provided where ntm processes are preferred over. Plasma arc machining pam plasma arc machining is a nontraditional thermal process.
Introduction to rapid prototyping, a ghosh, north west publication. Hybrid machining process hybrid machining process hmp. One possibility of vibrationsuperimposed machining is the. Oct 11, 2020 as in conventional machining, micromachining cutting force consists mainly of normal and tangential components, usually called shearingcutting and plowi ngthrust force, respectively. The term plasma, as employed in physics, means ionized particles. Brief overview and introduction to electrochemical machining, electrode discharge machining, ultrasonic machining, abrasive jet machining, material removal r. Ultrasonic, abrasive jet and abrasive water jet machining. Non conventional tools are more accurate and precise than the conventional tool. Oct 22, 2008 lecture series on manufacturing processes ii by prof. 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.
Nptel mechanical engineering manufacturing processes ii. Electro chemical discharge machining ecdm is a hybrid non conventional manufacturing process which combines the features of electro chemical machining ecm and electro discharge machining edm. These manufacturing process som study notes will help you to get conceptual deeply knowledge about it. Jan 01, 1986 machining operations cage of intricate shapes crosssectional area machining etc. Lecture 35 downscaling of conventional manufacturing processes and microtonano manufacturing lecture 36 packaging. Mishra, the institution of engineers india test book series, narosa publishing house 2005. High speed machining and assembly high speed machined aluminum parts are replacing builtup parts made by forming and assembly riveting in the aerospace industry. Laser beam machining is a thermal process having different advantages such as it can. It covers a wide spectrum of manufacturing activities such as machining, sheet metal working, welding, fabricating, scheduling and assembly. Ramkumar department of mechanical engineering iit kanpur march 26, 2018. Plasma is defined as a gas that has been heated to a sufficiently high temperature to become partially ionized and therefore electrically conductive.
Machining with a difference thats what non conventional machining is all about. Non traditional 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. The need to a avoid surface damage that often accompanies the stresses created by conventional machining. The process of nonconventional machining, on the other hand, employs modern and latest technology in processing. Difference between conventional and non conventional machining processes are. Pdf electron beam machining yunitha ratnadilla academia. Processes likeabrasive jet machining water jet machininglaser beam machininghot machiningplasma arc machininghave also been included. For materials with hardness greater than 65 hrc, ecg can have a material removal rate 10 times that of conventional machining. Ultrasonic machining is a non traditional 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. Non traditional machining processes pk mishra pdf download 22fda1de22. Non conventional machining methods also provide very good quality of surface finish which may also be an encouragement to these methods. The versatility of the opamp will be evident at the end of this chapter. These methods can be classified as the basis of their base principle of working. Hello everyone welcome to engineers academy topics covered.
Innovative geometric design of products and components made of new exotic materials with desired tolerance, surface finish cannot be produced economically by conventional machining. A flexible manufacturing system fms has four or more processing workstations connected mechanically by a common part handling system and electronically by a distributed computer system. This process involves no contact between the machine tools and material. Technological improvement of machining processes can be achieved by combining different machining actions or phases to be used on the material being removed. Laser beam machining is highly flexible machining system when it combines with multiaxis work positioning system or robot. Use of non corrosive and electrically non conducting material for making fixtures is recommended. Materials are removed by traversing in a direction parallel to the axis of rotation of axis or along a specified path to form a complex rotational shape. Introduction to non traditional machining processes prof.
Lecture series on manufacturing processes ii by prof. Non conventional machining iit notes free download as pdf file. The book provides insight into the use of some basic processes existing today in the domain of nonconventional manufacturing machining. Yunitha ratnadilla tri adhi kusuma 1560tk37951 electron beam machining a. Lecture on non conventional machining process by mech zone. In other words, the introduction of the mechanical abrasion action assists the ecd machining phase during electrochemical grinding ecg and. What are nonconventional machining processes engineers. The physical parameters of nonconventional machining processes have a direct. Samuel is associate professor at manufacturing engineering section at indian institute of technology iit, madras. Machining is a process in which a material often metal is cut into a desired final shape and size by a controlled materialremoval process. My areas of specialization are conventional and non conventional machining, automatic control, hydraulic control, machine tools and manufacturing automation. His publications include 42 international journal papers and 45 nationalinternational conference papers.
Plasma arc machining or laser beam machining is that which is the last point. Limitations of conventional machining methods i increased workpiece hardness. Manufacturing process study notes handwritten free pdf. Laser beam machining lbm is one of the most popular non conventional machining processes used in the area of advanced machining. Using hybrid processes, existing technological process limits can be extended by combining additional sources of energy and conventional existing machining processes. Modern machining processes presents unconventional machining methods which are gradually commercial acceptance. Modern or non traditional manufacturing processes modern or non traditional 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 used for. Materials are removed by traversing in a direction parallel to the axis of. Honing ech is one of the most potential hybrid electrochemicalmechanical process. His research area include micro machining, conventional and non conventional manufacturing, metrology and computer aided inspection. Chapter iiia the operational amplifier and applications. Conventional machining processes and machine tools moduleiv turning turning operation is a machining process and is used to produce round parts in shape by a single point cutting tool.
Situations where traditional machining processes are. Nonconventional machining iit notes machining composite. Non conventional manufacturing muzaffarpur institute of. Electrochemical grinding is often used for hard materials where conventional machining is difficult and timeconsuming, such as stainless steel and some exotic metals. Non traditional manufacturing processes an overview.
Electrochemical grinding is similar to electrochemical machining but uses a wheel instead of a tool shaped like the contour. Plasma arc machining process pdf 10 plasma arc machining. Introduction to nontraditional machining for iit kanpur. There can be a very long list of non conventional machining methods. Non traditional manufacturing processes or unconventional machining processes conventional machining processes mostly remove material in the form of chips by applying forces on the work material with a wedge shaped cutting tool that is harder than the work material under machining condition. Non conventional 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 used for. Request pdf non conventional and hybrid methods of bone machining having explored the basics of important fundamental contact mechanical and non contact thermal operations involved in. The dietorsion of the surface layer due to mechanical or thermal action may be another reaeon to call upon some of the same non conventional machining techniques. Also, the fixtures and tools should be rigid enough to avoid vibration or deflection under the high hydraulic forces to which they are subjected. Ultrasonic machining feed mechanism, head design and other aspects. All aspects of mechanical, electrochemical and thermal processes are comprehensively covered. Nptel mechanical engineering advanced machining processes.
Current trends in nonconventional material removal processes. I rapid improvements in the properties of materials hardness, strength, etc i requires much superior quality of tool materials. These newer methods are also called unconventional in the sense that. The part below was machined on a 5axis makino a77 at boeing using a 815k rpm spindle speed, and a feed of 240 ipm vs 60 ipm conventional machining. Inhouse machining of complex and less machinable jobs. In the non conventional process, this is not the case. From 1986 i am involved in teaching and research in the mechanical engineering department of indian institute of technology kanpur. Noc non traditional abrasive machining processes ultrasonic, abrasive jet abrasive water jet machining nocoperations management nocphase equilibria in materials nature and properties of materialsii. Conventional and non conventional manufacturing, metrology and computer aided inspection. It is employed to machine hard and brittle materials both electrically conductive and non conductive material having hardness usually greater than 40 hrc. This book describes various hybrid machining and finishing processes. Mathematical modeling of manufacturing processes usb. Laser beam machining lbm is one of the most widely used thermal energy based non contact type advance machining process which can be applied for almost whole range of materials. Lecture 8 hybrid epc processes and vacuum epc process.
Nonconventional and hybrid methods of bone machining. What is hybrid manufacturing and classification of hybrid. Bijoy bhattacharyya, biswanath doloi, in modern machining technology, 2020. Paul,department of mechanical engineering, iit kharagpur. They are classified under the domain of non traditional. Conventional machining processes and machine tools moduleiv.
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