Senthil kumar, ars publications the book unconventional machining processes for engineering and technology studies. 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. The machining medium is solid grains suspended in an abrasive slurry in the former,while a fluid is employed in the wjm process. Types of unconventional machining process manufacturing. Differentiate the conventional and unconventional machining processes in terms of principles. Pdf me6004 unconventional machining processes lecture notes. 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. Pdf unconventional machining processes local author by. 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.
The role of nonconventional machining processes ncmps in todays manufacturing. Introduction we all know that the term machinability refers to the case with which a metal can be machined to an acceptable surface finish. Brief introduction of nonconventional machining processes. Nontraditional machining processes semantic scholar.
Difference between conventional and nonconventional machining processes are. 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. Materials are removed by traversing in a direction parallel to the axis of. 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. Non traditional machining ntm or non conventional machining ncm, is a kind of machining technology which is different from traditional machining process and equipment. Ramkumar department of mechanical engineering iit kanpur march 26, 2018. The machining can be performed on various components in the form of either conventional or unconventional processes. Pdf nontraditional machining ntm processes are now being widely.
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. Pdf me6004 unconventional machining processes lecture. Nonconventional process promoted longer tool life because no direct contact is. Situations where traditional machining processes are. There is no physical contact between the tool and work piece, in some non.
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. Unconventional machining process need classification brief overview. Pdf nonconventional machining processes selection using multi. In the convention machining processes, tool is in direct contact with work piece. I the machining medium is solid grains suspended in an abrasive slurry. Abrasive jet machining water jet machining abrasive water jet machining ultrasonic machining. To classify non traditional machining processes ntm, one needs to understand and analyse the differences and similar characteristics between conventional.
Conventional machining processes and machine tools moduleiv. Conventional machining methods always produce some stress in the metal being cut. Pdf unconventional machining processes local author by dr. Comparison between conventional and non conventional machining. Introduction to nontraditional machining iit kanpur.
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. It combines the physical energy electricity, magnetism, sound, light and heat, chemical energy and even mechanical energy to applied on the machining position. However, in nonconventional machining ncm process, tool need not be harder than the workpiece, so hardness of workpiece is not a problem. 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. No conventional non conventional 1 direct contact of tool and workpiece. 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. 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. Nontraditional machining the definitive guide machinemfg. Conventional machining in addition to modern cnc machines, we also have machines for conventional machining which are indispensable for our production. 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. Tools are non conventional technique like laser beam, electric arc etc.
Nontraditional manufacturing processes is defined as a group of processes that remove. 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. In conventional machining process a tool, which is harder than the work piece is forced on the work piece. 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. Pdf nonconventional machining processes selection using.
Analytic hierarchy process, analytic network process. A decision guidance framework for nontraditional machining. A new nontraditional machining method using cavitation. Non conventional machining process book pdf youtube. This is not true when it comes to non conventional machining processes. Comparison between conventional and nonconventional machining. Mechanical machining i jet machining and ultrasonic machining usm are typical examples of single action, mechanical non traditional machining processes. In unconventional machining, a form of energy is used to remove unwanted material from a. 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. One needs to use nontraditional or advanced manufacturing techniques in general and advanced machining processes in particular 1. Understand the compare traditional and nontraditional machining process and recognize the need for nontraditional machining process. The main reasons for choosing non traditional machining processes are.
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. What are the various types of energy sources used in nontraditional machining techniques. 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 processes prof.
Unconventional machining process linkedin slideshare. 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. Unconventional machining processes introduction and. Dec 29, 2012 difference between conventional and non conventional machining processes are. The applications of machining process are as follows. Tools are nonconventional technique like laser beam, electric arc etc. Nonconventional machining processes selection using multiobjective 1449 journal of engineering science and technology november 2015, vol. Conventional machining process involved tool wearing as there is a physical contact between the tool and the work piece. Conventional machining an overview sciencedirect topics.
Non traditional manufacturing processes an overview. This is not true when it comes to nonconventional machining 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. And, metal removal takes place due to shearing action. Nov 15, 2017 this channel is formed by faculty from bit to enhance the knowledge of students towards technical and fundamentals. In conventional machining processes, there is a risk of tool wearing since physical contact is required to perform the job.
Pdf me6004 unconventional machining processes ump books. This book is written to serve the needs of under graduate students embarking introductory course in. 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. While making a part from raw material, one may require bulk removal of material, forming cavitiesholes and finally finishing as per the parts requirements. 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. What is the need for unconventional machining processes.
Abrasive jet machining water jet machining abrasive water jet machining. 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. In recent years there has been a massive growth in the usage of the non traditional machining process. Pdf selection of nontraditional machining process researchgate. 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. This book is written to serve the needs of under graduate students embarking introductory course in unconventional machining processes. Nonconventional machining processes the complex shapes and fragile components can also be machined with minimum human intervention. Unconventional machining process sasurie college of engineering. I the machining medium is solid grains suspended in an.
Non conventional process promoted longer tool life because no direct contact is made between the tool and the materials. Nonconventional tools are more accurate and precise than the conventional tool. All questions carry equal marks 1 explain the need for the development of unconventional machining process by considering any four simple cases of. Difference between conventional and nonconventional. Machining processes, which include cutting, grinding, and various non mechanical chipless processes, are desirable or even necessary for the following basic reasons.
No conventional nonconventional 1 direct contact of tool and workpiece. What is the limitation of conventional machining processes. Regarding these, nontraditional machining ntm processes have been developed since the world war ii largely in. The cutting tool and work piece are always in physical contact with relative motion with each other, which results in friction and tool wear. Several types of nontraditional machining processes have been developed to. 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. To aid these selection processes, different mcdm methods have. The need to a avoid surface damage that often accompanies the stresses created by conventional machining. 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. Ultrasonic machining usm and waterjet machining wjm 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 industries. Pdf the role of nonconventional machining processes ncmps in todays. Machining is one of the most important process of metal forming and shaping.
The need to a avoid surface damage that often accompanies the stresses created by conventional. In unconventional machining, a form of energy is used to remove unwanted material from a given workpiece. These nonconventional machining processes can be categorized in reference to type of machining actions involved in. I cuts can be started at any location without the need for predrilled holes. Nonconventional machining processes, multi criteria decision making, selection, moora method. This channel is formed by faculty from bit to enhance the knowledge of students towards technical and fundamentals. The need to a avoid surface damage that often accompanies the stresses created. They are classified under the domain of non traditional. Differences between conventional and non conventional machining processes. 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. Non conventional tools are more accurate and precise than the conventional tool. 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. Traditional machining methods are often ineffective in machining hard materials like ceramics and composites or machining under very tight tolerances as in micromachined components.
Several types of nontraditional machining processes have been developed to meet extra. Nontraditional machining processes are widely used to manufacture geometrically complex and precision parts for aerospace, electronics and automotive. 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. Apr 02, 2017 today we will learn about non traditional machining processes requirement, types, advantages and disadvantages. Find, read and cite all the research you need on researchgate. Non conventional machining processes selection using multiobjective 1449 journal of engineering science and technology november 2015, vol. For composites with dissimilar reinforcing phase and matrix e. 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. 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. 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. 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. 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.
The main reasons for choosing nontraditional machining processes are. These processes are generally used when traditional methods are not technically or economically feasible. Me6004 unconventional machining processes ump syllabus. 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. 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.
Tool may not be harder and it may not be physical presence. Selection of nontraditional machining process ijert. On successful completion of this module, the student should understand the fundamental concepts of nonconventional manufacturing technologies and the differences with the conventional processes. 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. The machining can be performed on a lathe machine, milling machine, ultrasonic machining, etc. Jain department of mechanical engineering, indian institute of technology kanpur, kanpur208016, india.
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