Ashish umarkar advanced manufacturing processes amp12154 unit no. Me 338 manufacturing processes ii department academic. 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. Regarding these, nontraditional machining ntm processes have been developed since the world war ii largely in response.
Among nontraditional machining processes, edm is considered to be one of the most. Modern machining processes presents unconventional machining methods which are gradually commercial acceptance. Conventional machining processes and machine tools pdf plz post vijay. A new nontraditional machining method using cavitation. Material removal may occur with chip formation or even no chip formation may take place.
Motivation of the project combined research and curriculum development. Advanced machining processes nontraditional and hybrid. 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. Nontraditional machining can be thought of as operations that do not use shear as their primary source of energy. 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. 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. 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. 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.
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. 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. Dynamic development in aircraft, automotive, chemical and medical industry is strictly connected with application of advanced engineering materials. 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. 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. Within the covers of this book, you will find expert coverage of both electrical discharge machining as well as. Non traditional unconventional machining process advance machining processes 4. In unconventional machining, a form of energy is used to remove unwanted material from. The course takes us through the fundamentals of different machining processes, and optimization of a chain of processes through which a part undergoes.
This is not an example of the work produced by our essay writing service. Review of basic machining processes and the mechanics of chip formation. High cuttingclamping forces create problems in regard to. 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. Many advanced finishing processes have been employed to make circular andor noncircular cavities and holes in difficulttomachine materials. 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. Electrochemical machining works on the principles of electrolysis. It also includes chapters on outsourcing, purchasing equipment, building a successful business, and closes with a chapter on the future revolutionary nontraditional machine. The introduction of abrasives to the fluid jet enhances the machining efficiency and is known as abrasive water jet machining. Non traditional machining processes linkedin slideshare. The processes described in this chapter are often called nontraditional machining ntm processes, and have the following advantages. In some applications these processes replaced almost completely the aluminium oxide processes 1893 and the green silicon carbide processes 1891. The machining medium is solid grains suspended in an abrasive slurry in the former,while a fluid is employed in the wjm process. These nonconventional machining processes can be categorized in reference to type of machining actions involved in removal of material from the workpiece surface.
The limitations of conventional machining processes engineering essay. 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. Yet, there are very few really good text books covering fundamentals, mathematical concepts and numerical problems. Unconventional machining processes introduction and.
Waterjet machining a schematic illustration of waterjet machining. 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. 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. Modern machining processes tata mcgrawhill, new delhi, 2007. Nontraditional manufacturing nontraditional manufacturing ntm processes refer to processes in which nontraditional energy transfer mechanism andor nontraditional media for energy transfer are involved. The limitations of conventional 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. When do we need nontraditional processes very high hardness and the strength of the material. Processes likeabrasive jet machining water jet machininglaser beam machininghot machiningplasma arc machininghave also been included. Basics of fixturing and metrology are also covered in this course. I the machining medium is solid grains suspended in an abrasive slurry in the former, while a. 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.
These methods form a group of processes which removes excess material by various. Nontraditional manufacturing processes linkedin slideshare. Pdf nonconventional machining processes selection using. Conventional machining uses tools, such as lathes, milling machines, boring machines, drill presses, or. Jain advanced machining processes allied publishers pvt. 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. 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. Nonconventional machining processes as viable alternatives for production with. 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. For example, abrasive water jet operations use mechanical energy, but material is removed by erosion. Nontraditional processes ntp nontraditional cutting. Brief introduction of nonconventional machining processes. All aspects of mechanical, electrochemical and thermal processes are comprehensively covered.
These processes are generally used when traditional methods are not technically or economically feasible. Nontraditional machining processes flashcards quizlet. 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 of laser machining processes aml home. Chemical milling, used for pockets, contours and overall metal removal, 2. The main reasons for choosing nontraditional machining processes are. A typical nonconventional process is the machining of abrasive discs using diamond adopted in 1955 or synthetic tools cubic boron carbide 1970. 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. Photochemical machining photosensitive resists are used for masks, 4. Advanced nontraditional machining processes springerlink.