Traditional machining methods are often ineffective in machining hard materials like ceramics and composites or machining under very tight tolerances as in micromachined components. Nontraditional machining the definitive guide machinemfg. Nontraditional machining processes are widely used to manufacture geometrically complex and precision parts for aerospace, electronics and automotive industries. Among the major nonconventional fabrication techniques are electrochemical fabrication also called electrochemical machining or ecm, electrical discharge machining or edm, water jet cutting, abrasive water jet cutting wj, awj, laser beam mach.
Machining is one of the most important process of metal forming and shaping. Conventional machining process involved tool wearing as there is a physical contact between the tool and the work piece. Mechanical machining i jet machining and ultrasonic machining usm are typical examples of single action, mechanical non traditional machining processes. Nontraditional machining processes are widely used to manufacture geometrically complex and precision parts for aerospace, electronics and automotive. Jun 20, 2016 hence the machining process which utilizes other machining methods are termed as unconventional machining or non traditional machining or advanced machining processes or modern machining processes. Pdf nonconventional machining processes selection using.
What is the limitation of conventional machining processes. Pdf nontraditional machining ntm processes are now being widely. They are classified under the domain of non traditional. Conventional machining in addition to modern cnc machines, we also have machines for conventional machining which are indispensable for our production. The machining medium is solid grains suspended in an abrasive slurry in the former,while a fluid is employed in the wjm process. This is not true when it comes to non conventional machining processes. These processes are generally used when traditional methods are not technically or economically feasible. Today we will learn about nontraditional machining processes requirement, types, advantages and disadvantages. Ramkumar department of mechanical engineering iit kanpur march 26, 2018. I the machining medium is solid grains suspended in an abrasive slurry. Me6004 unconventional machining processes ump syllabus. Abrasive jet machining water jet machining abrasive water jet machining. Nontraditional machining processes semantic scholar.
Nonconventional tools are more accurate and precise than the conventional tool. Pdf me6004 unconventional machining processes lecture notes. Nonconventional machining processes selection using multiobjective 1449 journal of engineering science and technology november 2015, vol. Difference between conventional machining and nontraditional machining ntm pintu 27042019 ntm by definition, machining is one of the secondary manufacturing processes by which excess material is gradually removed by shearing from a preformed blank in the form of solid chips using a wedge shaped cutting tool in order to get desired shape. Materials are removed by traversing in a direction parallel to the axis of. The applications of machining process are as follows. Selection of nontraditional machining process ijert. 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. Abrasive jet machining water jet machining abrasive water jet machining ultrasonic machining.
Analytic hierarchy process, analytic network process. Brief introduction of nonconventional machining processes. Nontraditional machining processes, also called advanced manufacturing processes, are employed where traditional machining processes are not feasible, satisfactory or economical due to special reasons as outlined below. Abrasion and shear when small and hard metallic particles are made vibrating against the workpiece to be machined, the material is removed by shear action and abrasion. Nonconventional process promoted longer tool life because no direct contact is. Nov 15, 2017 this channel is formed by faculty from bit to enhance the knowledge of students towards technical and fundamentals. Unconventional machining process linkedin slideshare. The cutting tool and work piece are always in physical contact with relative motion with each other, which results in friction and tool wear. Unconventional machining process sasurie college of engineering. There is no physical contact between the tool and work piece, in some non. The main reasons for choosing non traditional machining processes are. Difference between conventional and nonconventional machining processes are. In the convention machining processes, tool is in direct contact with work piece.
They are used for the production of spare parts and smaller series of products even just 1 piece which are just as necessary in different productions. Pdf nonconventional machining processes selection using multi. However, machining processes inevitably waste material in the form of chips, production rates may be low, and unless carried out properly, the processes can have detrimental effects on the surface properties and performance of parts. Conventional machining an overview sciencedirect topics. Pdf unconventional machining processes local author by dr.
Senthil kumar, ars publications the book unconventional machining processes for engineering and technology studies. Pdf unconventional machining processes local author by. Several types of nontraditional machining processes have been developed to. Differences between conventional and non conventional machining processes. Comparison between conventional and nonconventional machining. With ever increasing demand for manufactured goods of hard alloys and metals, such as inconel 718 or titanium, more interest has gravitated to nonconventional machining methods. The role of nonconventional machining processes ncmps in todays manufacturing.
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. However, in nonconventional machining ncm process, tool need not be harder than the workpiece, so hardness of workpiece is not a problem. Tools are non conventional technique like laser beam, electric arc etc. In conventional metal machining, oxygen is usually used, taking advantage of an exothermic chemical reaction to enhance the machining process, but argon or nitrogen are also used with cmcs. A new nontraditional machining method using cavitation. Nontraditional 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. Jain department of mechanical engineering, indian institute of technology kanpur, kanpur208016, india. Tool may not be harder and it may not be physical presence. Tools are nonconventional technique like laser beam, electric arc etc.
The processes are non traditional or nonconventional in the sense that they dont employ a conventional or traditional tool for material removal, instead, they directly utilize some form of energy for metal machining. In conventional machining process a tool, which is harder than the work piece is forced on the work piece. Understand the compare traditional and nontraditional machining process and recognize the need for nontraditional machining process. Difference between conventional and nonconventional. Why nontraditional processes are important need to machine newly developed metals and nonmetals with special properties that make them difficult or impossible to machine by conventional methods need for unusual andor complex part geometries that cannot easily be accomplished by conventional machining need to avoid surface damage that. Introduction to nontraditional machining iit kanpur. For composites with dissimilar reinforcing phase and matrix e. Nontraditional 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. Unconventional machining processes introduction and. Non traditional machining ntm or non conventional machining ncm, is a kind of machining technology which is different from traditional machining process and equipment.
Conventional machining processes and machine tools moduleiv. What is the need for unconventional machining processes. All questions carry equal marks 1 explain the need for the development of unconventional machining process by considering any four simple cases of. I cuts can be started at any location without the need for predrilled holes. In conventional machining processes, there is a risk of tool wearing since physical contact is required to perform the job. Several types of nontraditional machining processes have been developed to meet extra. The need to a avoid surface damage that often accompanies the stresses created. Jan 09, 2018 among the major non conventional fabrication techniques are electrochemical fabrication also called electrochemical machining or ecm, electrical discharge machining or edm, water jet cutting, abrasive water jet cutting wj, awj, laser beam mach.
Nontraditional manufacturing processes is defined as a group of processes that remove. In unconventional machining, a form of energy is used to remove unwanted material from a. Regarding these, nontraditional machining ntm processes have been developed since the world war ii largely in. I the machining medium is solid grains suspended in an. In order to realize the manufacturing machining demands thrived by newer, hard and difficulttomachine materials being utilized in the present day industries, an assortment of non traditional machining ntm processes has been developed over the past few decades. The main reasons for choosing nontraditional machining processes are.
On successful completion of this module, the student should understand the fundamental concepts of nonconventional manufacturing technologies and the differences with the conventional processes. Conventional machining also costs in terms of tool wear and in loss of quality in the product owing to induced residual stresses during manufacture. Nonconventional machining processes, multi criteria decision making, selection, moora method. Introduction as a result of the advances in machine tools and cutting tool technology in recent decades, many of the conventional machining processes such as turning, milling and drilling have become costeffective, flexible and highthroughput manufacturing processes for producing high precision and high. In recent years there has been a massive growth in the usage of the non traditional machining process. The need to a avoid surface damage that often accompanies the stresses created by conventional. In order to realize the manufacturingmachining demands thrived by newer, hard and difficulttomachine materials being utilized in the present day industries, an assortment of nontraditional machining ntm processes has been developed over the past few decades. This book is written to serve the needs of under graduate students embarking introductory course in.
To aid these selection processes, different mcdm methods have. This book is written to serve the needs of under graduate students embarking introductory course in unconventional machining processes. These nonconventional machining processes can be categorized in reference to type of machining actions involved in. Apr 02, 2017 today we will learn about non traditional machining processes requirement, types, advantages and disadvantages.
Non traditional manufacturing processes an overview. An unconventional machining process or non traditional machining process is a special type of machining process in which there is no direct contact between the tool and the workpiece. Find, read and cite all the research you need on researchgate. This is not true when it comes to nonconventional machining processes. Download me6004 unconventional machining processes lecture notes, books, syllabus parta 2 marks with answers me6004 unconventional machining processes important partb 16 marks questions, pdf books, question bank with answers key. Non conventional process promoted longer tool life because no direct contact is made between the tool and the materials.
Pdf me6004 unconventional machining processes ump books. The machining can be performed on various components in the form of either conventional or unconventional processes. Types of unconventional machining process manufacturing. What are the various types of energy sources used in nontraditional machining techniques. The need to a avoid surface damage that often accompanies the stresses created by conventional machining. Differentiate the conventional and unconventional machining processes in terms of principles. Ultrasonic machining usm and waterjet machining wjm are typical examples of single action, mechanical non traditional machining processes. It combines the physical energy electricity, magnetism, sound, light and heat, chemical energy and even mechanical energy to applied on the machining position. Non conventional machining processes selection using multiobjective 1449 journal of engineering science and technology november 2015, vol. No conventional nonconventional 1 direct contact of tool and workpiece. And, metal removal takes place due to shearing action.
Pdf selection of nontraditional machining process researchgate. This channel is formed by faculty from bit to enhance the knowledge of students towards technical and fundamentals. The aim of the mtcs nonconventional machining ncm theme is to provide efficient, costeffective solutions for the manufacture of traditionally difficult to machine materials using stateoftheart spark erosion and laser technologies. The unconventional machining is also called as non traditional machining the unconventional machining use for the machine the hard and brittle materials such as carbides, stainless steel, hastelloy, nitralloy, waspalloy, and any other that cannot be machined by a conventional process using the conventional machines such as lathe, milling, shaper, planer etc. In some alloys, surface roughness is a major issue if machined through conventional machining hence non traditional processes such as lbm, edm, wire edm etc are preferred. Pdf the role of nonconventional machining processes ncmps in todays. In unconventional machining, a form of energy is used to remove unwanted material from a given workpiece. 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 tools are more accurate and precise than the conventional tool.
An unconventional machining process or nontraditional machining process is a special type of machining process in which there is no direct contact between the tool and the workpiece. To classify non traditional machining processes ntm, one needs to understand and analyse the differences and similar characteristics between conventional. The primary limitation is that conventional machining requires that a machinist be trained in the use of the appropriate machine tools to complete the tasks at hand. A decision guidance framework for nontraditional machining. Nonconventional machining processes the complex shapes and fragile components can also be machined with minimum human intervention. No conventional non conventional 1 direct contact of tool and workpiece. While making a part from raw material, one may require bulk removal of material, forming cavitiesholes and finally finishing as per the parts requirements. Unconventional machining process need classification brief overview. Machining processes, which include cutting, grinding, and various non mechanical chipless processes, are desirable or even necessary for the following basic reasons. 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. Introduction to nontraditional machining processes prof. One needs to use nontraditional or advanced manufacturing techniques in general and advanced machining processes in particular 1. Non traditional machining processes, also called advanced manufacturing processes, are employed where traditional machining processes are not feasible, satisfactory or economical due to special reasons as outlined below. 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.
Hence the machining process which utilizes other machining methods are termed as unconventional machining or nontraditional machining or advanced machining processes or modern machining processes. The machining can be performed on a lathe machine, milling machine, ultrasonic machining, etc. Non conventional machining process book pdf youtube. Pdf me6004 unconventional machining processes lecture. Situations where traditional machining processes are. Nontraditional 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 traditional manufacturing processes. In many cases, the engineering materials cannot be machined by traditional machining processes because of their shape and material type and other effective factors 3. With ever increasing demand for manufactured goods of hard alloys and metals, such as inconel 718 or titanium, more interest has gravitated to non conventional machining methods. Comparison between conventional and non conventional machining. Introduction we all know that the term machinability refers to the case with which a metal can be machined to an acceptable surface finish. The aim of the mtcs non conventional machining ncm theme is to provide efficient, costeffective solutions for the manufacture of traditionally difficult to machine materials using state of theart spark erosion and laser technologies. Conventional machining methods always produce some stress in the metal being cut. Dec 29, 2012 difference between conventional and non conventional machining processes are.
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