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. Review of basic machining processes and the mechanics of chip formation duration. The socalled nonconventional machining techniques can no longer be called non traditional, since they have wide range of applications. Introduction to nontraditional machining iit kanpur. It combines the physical energy electricity, magnetism, sound, light and heat, chemical energy and even mechanical energy to applied on the machining position. 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. 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.
Additionally, conventional processes include turning, milling, drilling, grinding etc. Pdf unconventional machining processes local author by. Several optimization techniques that can be classified as conventional and nonconventional approaches have been introduced to optimize the cutting parameters. Machining is any of various processes in which a piece of raw material is cut into a desired final shape and size by a controlled materialremoval process. Manufacturing processes can be broadly divided into two groups and they are primarymanufacturing processes and secondary manufacturing processes. 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. Pdf nonconventional machining processes selection using. Material removal by mechanical, chemical, thermal and electrochemical processes are described in detail.
The role of nonconventional machining processes ncmps in todays manufacturing. Several types of nontraditional machining processes have been developed to meet. 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. Because of point cutting wjc is able to cut materials almost any pattern.
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. 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. Non conventional approaches for optimizing of cutting. Conventional machining in addition to modern cnc machines, we also have machines for conventional machining which are indispensable for our production. Machining techniques conventional machining principles apply to composites. Aglossary of key concepts is attached at end of the book. Nonconventional machining methods also provide very good quality of surface finish which may also be an encouragement to these methods. Pdf selection of nonconventional machining processes using the. History the early ancestors of modern humans, likely first used a jawbone of bovid animals as a saw. Traditional machining methods are often ineffective in machining hard materials like ceramics and composites or machining under very tight tolerances as in micromachined components. Conventional machining methods always produce some stress in the metal being cut. 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.
In this article we will discuss about the nonconventional methods of machining used in industries. The improved thermal, mechanical and chemical properties of advanced materials super alloys, composites, and ceramics have created impediments in easy machining of such materials by conventional machining processes namely turning, milling and drilling etc. The main reasons for choosing nontraditional machining processes are. Laser beam machining lbm, abrasive water jet machining awjm. 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.
These modern machining methods are also known as nontraditional machining ntm processes, harness unconventional sources of energies for material. Electrical discharge machining edm is one of the most widely used non traditional. The former onesprovide basic shape and size to the material as per designers requirement. Conventional machining uses tools, such as lathes, milling machines, boring machines, drill presses, or. A casebased reasoning approach for nontraditional machining. Given this, nontraditional machining is widely utilized in responding to modern industrial problems.
Understand conventional and nonconventional manufacturing term. Machining is a processes in which a piece of raw material is cut into a desired final shape and size by a controlled materialremoval process. Nontraditional machining the definitive guide machinemfg. Until at least the mid19th century, saws were made laboriously by hand. Consequently, non traditional techniques of machining are providing effective solutions to the problems imposed by the increasing demand for high strength temperature resistant alloys, the requirement of parts with intricate and compacted shapes and materials so hard as to defy machining by conventional methods. 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. Non traditional manufacturing processes an overview.
Pdf me6004 unconventional machining processes lecture. Modern machining processes download ebook pdf, epub. The machining medium is solid grains suspended in an abrasive slurry in the former,while a fluid is employed in the wjm process. Pdf the role of nonconventional machining processes ncmps in todays manufacturing environment has been well acknowledged. 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. For example, abrasive water jet operations use mechanical energy, but material is removed by erosion. Those nonconventional machining methods allow the machining of. This channel is formed by faculty from bit to enhance the knowledge of students towards technical and fundamentals. Tools are nonconventional technique like laser beam, electric arc etc. These methods can be classified as the basis of their base principle of working.
Difference between conventional and nonconventional. Advance non conventional machining methods are following. 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. This book covers the various advanced manufacturing processes employed by manufacturing industries to improve their productivity in terms of socioeconomic development. A comparative study of process parameters in the selection of nontraditional machining ntm processes for optimization 9 process utilizes highly collimated, monochromatic and coherent light beam to melt and evaporate the work material. Ultrasonic machining usm and waterjet machining wjm are typical examples of single action, mechanical non traditional machining processes.
Laser micromachining and laser milling are two different categories of lbm process. Comparison between conventional and nonconventional machining. In 1950, he invented first portable saw which has a. Scribd is the worlds largest social reading and publishing site. In elastic emission machining process, machining is carried. In unconventional machining, a form of energy is used to remove unwanted material from. 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.
A new nontraditional machining method using cavitation. Pdf nonconventional machining processes selection using multi. In 1926, the first saw which worked with electricity was invented by andreas stihl. Download pdf nontraditional machining processes free. Pdf selection of the most suitable nonconventional machining process ncmp for a given machining application can be viewed as. Call us for information on tooling specifications for machining composites. Machining techniques conventional machining principles. Non conventional machining free download as powerpoint presentation. The authors present automated conventional and nonconventional machining techniques as well as virtual machining principles and techniques. The nonconventional manufacturing is designed to prepare interested students for future careers manufacturing industry where nonconventional machines are used. 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. 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. All aspects of mechanical, electrochemical and thermal processes are. This book is written to serve the needs of under graduate students embarking introductory course in.
Automatic tool changer pallet shuttles automatic workpart positioning cnc turning center. What are the advantages of wjc over conventional cutting methods. Machining centers machining center highly automated machine tool capable of performing multiple machining operations under cnc control. Senthil kumar, ars publications the book unconventional machining processes for engineering and technology studies. In 1927, emil lerp invented a saw that works with using oil in germany. No conventional nonconventional 1 direct contact of tool and workpiece. Conventional and non conventional machining processes duration. Unconventional machining processes introduction and. Wjc will not burn surfaces or produces a heat an affected zone. Nontraditional machining can be thought of as operations that do not use shear as their primary source of energy.
Nonconventional manufacturing processes question 1a conventional and wide spread machining processes include. There can be a very long list of nonconventional machining methods. The discussion is then extended to various conventional methods of machining followed by the difficulties in working on these alloy using traditional methods of machining. Non traditional machining processes free download as powerpoint presentation.
This paper presents a new method in machining of materials using cavitation process. The need to a avoid surface damage that often accompanies the stresses created by conventional machining. Brief introduction of nonconventional machining processes. Non traditional machining ntm or non conventional machining ncm, is a kind of machining technology which is different from traditional machining process and equipment. These processes are generally used when traditional methods are not technically or economically feasible.
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