Nontraditional machining processes are widely used to manufacture geometrically complex and precision parts for aerospace, electronics and. No conventional nonconventional 1 direct contact of tool and workpiece. High speed machining, hard machining, non conventional processes like beam, mechanical and chemical. In conventional machining process physical contact was made between work piece and took and the metal is removed in the form of chip. Advancedunconventionalnon traditional machining process an. This is due to material removal rate mrr decreases with increased hardness of the work material. 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.
Brief overview and introduction to electrochemical machining, electrode discharge machining, ultrasonic machining, abrasive jet machining, material removal r. 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. Comparison between conventional and nonconventional machining. Generally two broad classification of machining process are there, they are 1. Difference between conventional and nonconventional. 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.
One needs to use nontraditional or advanced manufacturing techniques in general and advanced machining processes in particular 1. Many advanced finishing processes have been employed to make circular andor noncircular cavities and holes in difficulttomachine materials. Need for unconventional processes ynew materials having high strength and hardness, such as nimonic alloys and alloys with alloying elements such as tungsten, molybdenum, and columbium are difficult to machinebythetraditional methods. Technological improvements of nonconventional machining processes can be achieved by combining different physiochemical action on the material being processed. All questions carry equal marks 1 explain the need for the development of unconventional machining process by considering any four simple cases of your own interest. Traditional machining methods are often ineffective in machining hard materials like ceramics and composites or machining under very tight tolerances as in micromachined components. 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. Necessity to use new materials, demanding functional requirements and miniaturization have led to evolution of modern manufacturing processes. In electric discharge machining process an arc is produced when two currentcarrying wires are shortcircuited. Conventional machining also costs in terms of tool wear and in loss of quality in the product owing to induced residual stresses during manufacture.
Pdf me6004 unconventional machining processes lecture. Nonconventional conventional machining process uses a sharp cutting tool to cut the metal. Conventional and non conventional machining processes. In unconventional machining, a form of energy is used to remove unwanted material from a given workpiece. Learn different types of unconventional joining process and advance joining machines.
During this machining process, a small portion of metals is also eroded away, leaving a small cater. 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. A tool with a certain rake angle a positive as shown and relief angle moves along the surface of the workpiece at a depth t 1. Advanced nontraditional machining processes springerlink. Regarding these, nontraditional machining ntm processes have been developed since the world war ii largely in response. Edm machining process is also known as spark erosion machining. If you have any query regarding this article, ask by commenting. Situations where traditional machining processes are unsatisfactory or.
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. This is all about nontraditional machining process, requirements, types, advantages and disadvantages. The machining medium is solid grains suspended in an abrasive slurry in the former,while a fluid is employed in the wjm process. It combines the physical energy electricity, magnetism, sound, light and heat, chemical energy and even mechanical energy to applied on the machining position. Unconventional machining processes introduction and. Tools are nonconventional technique like laser beam, electric arc etc. The machining process so developed is called hybrid machining processes hmps kozak and rajurkar, 2000. Nontraditional machining the definitive guide machinemfg. Tools that belongs to reaming and tapping processes are tend to breakage so machinists should behave carefully not to break tapers and reamers pieces in the hole.
These advanced machining processes amp become still more important when one considers precision and ultraprecision machining. Unconventional machining process unconventional forming process need for unconventional machining process harder and difficult to machine materials, can be machined easily and precisely. It is a process in which a piece of raw material is cut into a desired shape and size by means of sharp cutting tools called a machining process. 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. Me6004 unconventional machining processes ump syllabus. Hence the machining process which utilizes other machining methods are termed as unconventional. What is the need for unconventional machining processes. View unconventional machining process question bank. Abrasive jet machining water jet machining abrasive water jet machining ultrasonic machining. This book is written to serve the needs of under graduate students embarking introductory course in unconventional machining processes. It is similar to abrasive jet machining ajm in water jet machining, high velocity water jet is allowed to strike a given workpiece. The need to a avoid surface damage that often accompanies the stresses created.
Introduction to manufacturing processes introduction. Water jet machining wjm is a mechanical energy based nontraditional machining process used to cut and machine soft and nonmetallic materials it involves the use of high velocity water jet to smoothly cut a soft workpiece. In particular, the unconventional machining actions such as. Pdf unconventional machining processes local author by. Manufacturing process technology part i 28,171 views. Unconentional machining process need for unconventional processes new materials having high strength and hardness, such as nimonic alloys. Senthil kumar, ars publications the book unconventional machining processes for engineering and technology studies. Need for the development of unconventional machining methods unconventional 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. Classification of ucm classification of ucm based on type of energy required to shape the. Laser beam machining lbm is a non conventional machining manufacturing process, a form of machining, in which a laser is directed towards the work piece for machining. Materials are removed by traversing in a direction parallel to the axis of. The advent of hard materials for aerospace applications have made the machining process by conventional methods very difficult and time consuming. Learn different types of unconventional forming process.
Unconventional machining processes, modern machining processes, and new technology. 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. Here we discuss the fundamentals, characteristics, classification and need of modern non traditional 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. In conventional machining cutting tool must be harder than the work piece material. Subscribe our channel for more interesting articles. Download the seminar report, notes, ppt and journals on the topic unconventional manufacturing process. Learn different types of unconventional machining process and advance machines.
Brief introduction of nonconventional 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. It deals with the latest machining processes named as advanced machining processes. Pdf me6004 unconventional machining process researchgate. Need for unconventional machining processes extremely hard and brittle materials or difficult to machine material are difficult to machine by traditional machining processes. The need to a avoid surface damage that often accompanies the stresses created by conventional machining. Introduction to nontraditional machining iit kanpur. In unconventional machining, a form of energy is used to remove unwanted material from. 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. Assessment of research needs for sustainability of. 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. A new nontraditional machining method using cavitation. Lecture on non conventional machining process by mech zone. Unconventional machining process need classification brief overview.
Types, advantages, limitations, machine tool, cutting tool, chips. If you like this article, dont forget to share it on your social networks. Developments are taking place both in the conventional methods and unconventional methods of manufacture. The basic mechanics of chiptype machining processes fig. To classify non traditional machining processes ntm, one needs to understand and analyse the differences and similar characteristics between conventional. Nontraditional machining processes semantic scholar. Part 1 deals with mechanical type advanced machining processes such as ultrasonic machining, water jet machining, abrasive water.
What is the difference between conventional and non. 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. Modern machining method working principle of electric discharge machining electric discharge machining process is carried out in presence of dielectric fluid which creates path for discharge. The introduction of abrasives to the fluid jet enhances the machining efficiency and is known as abrasive water jet machining. This process uses thermal energy to remove material from metallic or nonmetallic surfaces. Non traditional machining ntm or non conventional machining ncm, is a kind of machining technology which is different from traditional machining process and equipment.
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