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