Among nontraditional machining processes, edm is considered to be one of the most. Non traditional manufacturing processes an overview introduction 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. 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. Ashish umarkar advanced manufacturing processes amp12154 unit no. Processes likeabrasive jet machining water jet machininglaser beam machininghot machiningplasma arc machininghave also been included. When do we need nontraditional processes very high hardness and the strength of the material. Nontraditional manufacturing nontraditional manufacturing ntm processes refer to processes in which nontraditional energy transfer mechanism andor nontraditional media for energy transfer are involved. A typical nonconventional process is the machining of abrasive discs using diamond adopted in 1955 or synthetic tools cubic boron carbide 1970. Pdf nonconventional machining processes selection using.
Non traditional machining processes linkedin slideshare. Many advanced finishing processes have been employed to make circular andor noncircular cavities and holes in difficulttomachine materials. 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. 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 limitations of conventional machining processes engineering essay. Some of the processes employed for hole making are electrodischarge machining, laser beam machining, electron beam machining, shaped tube electrochemical machining and electrochemical spark machining. This is not an example of the work produced by our essay writing service.
Motivation of the project combined research and curriculum development. Material removal may occur with chip formation or even no chip formation may take place. The main reasons for choosing nontraditional machining processes are. 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.
It also includes chapters on outsourcing, purchasing equipment, building a successful business, and closes with a chapter on the future revolutionary nontraditional machine. Jain advanced machining processes allied publishers pvt. The processes described in this chapter are often called nontraditional machining ntm processes, and have the following advantages. Introduction of laser machining processes aml home. The course takes us through the fundamentals of different machining processes, and optimization of a chain of processes through which a part undergoes. Nonconventional machining processes as viable alternatives for production with. Brief introduction of nonconventional machining processes. Waterjet machining a schematic illustration of waterjet machining. 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.
Development development of harder and difficult to machine materials such as hastalloy, nitra alloy, waspalloy, nimonics, carbides, stainless steel, heat resisting steels and many other hstr alloys used in aerospace. Nontraditional machining can be thought of as operations that do not use shear as their primary source of energy. I the machining medium is solid grains suspended in an abrasive slurry in the former, while a. Conventional machining uses tools, such as lathes, milling machines, boring machines, drill presses, or. Nontraditional machining processes covers recent research and development in techniques and processes which focus on achieving high accuracies and good surface finishes, parts machined without burrs or residual stresses especially with materials that cannot be machined by conventional methods. These methods form a group of processes which removes excess material by various. Nontraditional machining processes flashcards quizlet. Basics of fixturing and metrology are also covered in this course. Yet, there are very few really good text books covering fundamentals, mathematical concepts and numerical problems. Nontraditional processes ntp nontraditional cutting. 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. All aspects of mechanical, electrochemical and thermal processes are comprehensively covered. Many material removal processes have been developed since world war ii to address problems that cant be handled with conventional, that is, traditional chipforming machining processes. The limitations of conventional machining processes.
Modern machining processes tata mcgrawhill, new delhi, 2007. In some applications these processes replaced almost completely the aluminium oxide processes 1893 and the green silicon carbide processes 1891. High cuttingclamping forces create problems in regard to. Unconventional machining processes introduction and. The introduction of abrasives to the fluid jet enhances the machining efficiency and is known as abrasive water jet machining.
Electrochemical machining works on the principles of electrolysis. 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. As contrasted to the additivejoining processes covered in the course manufacturing processes 1viz. 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. The machining medium is solid grains suspended in an abrasive slurry in the former,while a fluid is employed in the wjm process. For example, abrasive water jet operations use mechanical energy, but material is removed by erosion. Nontraditional manufacturing processes linkedin slideshare. Intended as a guide for working with some of the most difficulttomachine materials such as superalloys, ceramics, and composites, advanced machining is a definitive reference for both nontraditional and hybrid machining processes. Carl sommer, author of over 50 books, is uniquely qualified to author this book on nontraditional machining. Dynamic development in aircraft, automotive, chemical and medical industry is strictly connected with application of advanced engineering materials. 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. Advanced machining processes nontraditional and hybrid. Review of basic machining processes and the mechanics of chip formation. On account of the importance of these production methods in modern manufacturing systems, non traditional machining processes are now included in curriculum of the most graduate and undergraduate engineering courses.
Gate 2019 mechanical engineering syllabus contains engineering mechanics, mechanics of materials, theory of machines, vibrations, machine design, fluid mechanics, heattransfer, thermodynamics, engineering materials, casting, forming and joining processes, machining and machine tool operations, metrology and inspection, computer integrated manufacturing. Chemical milling, used for pockets, contours and overall metal removal, 2. Nonconventional machining processes selection using multiobjective 1449 journal of engineering science and technology november 2015, vol. In order to achieve higher dimensional accuracy along with better surface quality, the conventional machining processes have nowadays being replaced by nontraditional machining ntm processes. Photochemical machining photosensitive resists are used for masks, 4. Non traditional unconventional machining process advance machining processes 4. 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.
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. Thermal energy processes very high local temperatures material is removed by fusion or vaporization physical and metallurgical damage to the new work surface in some cases, resulting finish is so poor that subsequent processing is required thermal energy processes electric discharge machining electric discharge wire cutting electron beam. Conventional machining processes and machine tools pdf plz post vijay. A new nontraditional machining method using cavitation. Me 338 manufacturing processes ii department academic. These processes are generally used when traditional methods are not technically or economically feasible. This course deals with non traditional machining processes, we will discuss about advantage and disadvantages, instrument used for machining, applications of various processes and all numericals from gate. Regarding these, nontraditional machining ntm processes have been developed since the world war ii largely in response. Within the covers of this book, you will find expert coverage of both electrical discharge machining as well as. These nonconventional machining processes can be categorized in reference to type of machining actions involved in removal of material from the workpiece surface. Advanced nontraditional machining processes springerlink. Modern machining processes presents unconventional machining methods which are gradually commercial acceptance. 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.
1457 1240 586 658 390 10 366 796 1317 1225 154 1587 762 605 744 529 978 832 968 607 1002 1146 451 1094 1034 301 484 1409 1290 581 1026 255 785 1120 842 842 370 382