Due to its high degree of precision, it is a recommended method of machining for critical components. The recent increase in the use of hard, high strength and temperature resistant materials in engineering has necessitated the development of newer machining techniques. Non traditional manufacturing processes an overview. Advancedunconventionalnon traditional machining process an. Laser beam machining is a non conventional machining process in which the workpiece is being holed by the laser machining process. The difference between conventional and nonconventional. Mention the best suited unconventional machining process for the following operations. Now we are moving to construction or main parts, so.
Pdf the role of non conventional machining processes ncmps in todays manufacturing environment has been well acknowledged. I the machining medium is solid grains suspended in an abrasive slurry in the former, while a uid is employed in the wjm process. Mechanical energy processes ultrasonic machining usm. The main attraction of edm over traditional machining processes such as metal cutting using different tools and grinding is that this technique utilises thermoelectric process to erode undesired materials from the work piece by a series of discrete electrical sparks between the work piece and the electrode. 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 processes and machine tools moduleiv. A variety of work materials repeatable regular geometries close tolerance processes such as casting, forging, and bar drawing create the general shape. Edm being a non contact type of machining process, it is very well suited for making fragile parts which cannot take the stress of machining. The need to machine newly developed metals and non. Electrochemical machining ecm electro chemical grinding ecg 3. Materials are removed by traversing in a direction parallel to the axis of. Nontraditional manufacturing processes or nonconventional manufacturing processes. How is classification of nontraditional machining done. Learn different types of unconventional machining process and advance machines. Hence the machining process which utilizes other machining methods are termed as unconventional. Introduction to nontraditional machining for iit kanpur. This is because, in conventional machining, there is a direct contact between the tool and the work piece. 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.
There is no physical contact between the tool and work piece, in some non. The authors present automated conventional and non conventional machining techniques as well as virtual machining principles and techniques. Mechanical machining ultrasonic machining usm and waterjet machining wjm are typical examples of single action, mechanical non traditional machining processes. The course is consists of all nonconventional manufacturing processes. Students will able to model mathematically and analyse various unconventional machining process. Non traditional machining ntm processes are now being widely used to generate intricate and accurate shapes in materials, like titanium, stainless steel, high strength temperature resistant hstr alloys, fiberreinforced composites, ceramics, refractories and other difficulttomachine alloys having higher strength, hardness. A glossary of key concepts is attached at end of the book. The following examples are provided where ntm processes are preferred over. Laser beam machining and drilling lbm, plasma arc machining pam and electron beam. Several types of non traditional machining processes have been developed to meet extra required machining conditions.
Why nontraditional processes are important need to machine newly developed metals and non metals 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. Name the important factors that should be considered during the. The machining medium is solid grains suspended in an abrasive slurry in the former,while a fluid is employed in the wjm process. Singhmelkotecolton orthogonal cutting oblique cutting. Advanced machining and manufacturing processes kaushik. Unconventional machining process need classification brief overview.
Several types of non traditional machining processes have been developed to. Similarly, abrasive jet machining ajm, ultrasonic machining usm, water jet and abrasive water jet machining wjm and awjm, electrodischarge machining edm are some of the non conventional machining processes. The advent of hard materials for aerospace applications have made the machining process by conventional methods very difficult and time consuming. Technological improvement of machining processes can be achieved by combining different machining actions or phases to be used on the material being removed. Non traditional machining processes manufacturing processes can be broadly divided into two groups. In some applications these processes replaced almost completely the aluminium oxide processes 1893 and the green silicon carbide processes 1891. Introduction in todays industry, a number of non conventional machining processes ncmps are increasingly being used for processing of different engineering materials. Let us learn more about the ultrasonic machining process, the working principle, key parts, advantages, and disadvantages in this article. Various nonconventional machining process slideshare. Hello everyone welcome to engineers academy topics covered. Several types of non traditional machining processes have been developed to meet extra. Although the considered ncmp can machine a wide spectrum of. Singhmelkotecolton e segmented chip low thermal conductivity materials f discontinuous chip. Percentages of studies categorized by types of nontraditional machining extracted and summa rized from di erent.
A comparative study of various nonconventional machining process and. Sl conventional process non conventional process no. Nontraditional machining alpha college of engineering. Non traditional machining method is an advanced method used to overcome the problems of traditional machining methods.
Non conventional manufacturing muzaffarpur institute of. Selection of nontraditional machining process ijert. As you know that there are various non traditional machining methods and edm is one of them and the rest are presented below. Mechanical processes abrasive jet machining ajm ultrasonic machining usm water jet machining wjm electrochemical processes electrochemical machining ecm electro chemical grinding ecg electro jet drilling ejd electrothermal processes electrodischarge machining edm laser jet machining ljm electron beam machining ebm chemical processes chemical milling chm photochemical milling pcm 14 p a g e. The need to a avoid surface damage that often accompanies the stresses created by conventional machining. In conventional as well as non conventional machining processes, there is a general trend of applying the shaping process first before the finishing process. In sequential machining, one particular process which is used as a finishing process in one combination of sequencing can be used as a shaping process in other combination of sequencing. Material removal by mechanical, chemical, thermal and electrochemical processes are described in detail. The cutting tool and work piece are always in physical contact with relative motion with each other, which results in friction and tool wear.
Differences between conventional and non conventional machining processes. Example of this type of machining is electrochemical machining. Comparison of parameters nonconventional machining process. It is one of the types of nontraditional machining methods. Lecture notes on modern manufacturing process dr pramod. 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. Electrical discharge machining edm is one of the most widely used non traditional machining processes. Non conventional machining processes, multi criteria decision making, selection, moora method. For more information, contact aero spec engineering. Conventional machining an overview sciencedirect topics.
Conventional process mostly uses mechanical energy. Name the unconventional machining processes which produce best surface finish. Analytic hierarchy process, analytic network process. Classify various non traditional machining process based on energy source used with giving suitable examples. The nontraditional processes have been developed since world war ii largely in response to new and unusual machining requirements that could not be satisfied by conventional methods. A typical non conventional process is the machining of abrasive discs using diamond adopted in 1955 or synthetic tools cubic boron carbide 1970. Another type of knee and column milling machine possible is the verticalaxis. The dame principle can also be applied in reversed way in the process of electrochemical plating. Several types of non traditional machining processes have developed to better machining condition. In this process, a high velocity water jet is used to machining work piece.
When these machines are employed, they are many advantages over the traditional machining process. Several types of nontraditional machining processes have been developed to meet extra. Non traditional machining is also called advance manufacturing process. Non conventional machining processes selection using multiobjective 1445 journal of engineering science and technology november 2015, vol. Pdf nonconventional machining processes selection using multi. Students will able to implement water energy, electromagnetic, electrodischarge and explosive energy for forming process. Classification of non traditional machining is based on following factors. Based on the various parameters of machining, compare the conventional and non conventional machining processes.
To remove the material from the workpiece the process used thermal energy. The common non traditional machining processes are described in this section. Why nontraditional processes are important need to machine newly developed metals and non metals 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 often accompanies conventional machining. Material removal process types, advantages, limitations. Unconventional machining process sasurie college of engineering. Several types of nontraditional machining processes have been developed to meet. Ultrasonic machining usm and waterjet machining wjm are typical examples of single action, mechanical non traditional machining processes. Conventional machining processes such as turning, drilling or milling can be applied to composite materials, provided proper tool design and operating conditions are adopted. Several types of nontraditional machining processes have been developed to. Classification of unconventional machining processes was mainly on the basis of the nature of energy employed in machining process. When these processes are employed properly, they offer many advantages over non traditional machining processes.
Apr 02, 2017 water jet machining is an environment friendly, nontraditional machining process. 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. Electrochemical machining ecm in this machining, an electrolyte acts as a current carrier and high rate of electrolyte movement in the tool and. 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. Conventional machining methods always produce some stress in the metal being cut.
Jan 24, 2016 if such materials are machined with the help of conventional machining processes, either the tool undergoes extreme wear while machining hard work piece or the work piece material is damaged while machining brittle work piece. The processes are non traditional or non conventional 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. Nontraditional processes ntp nontraditional cutting processes. In recent years there has been a massive growth in the usage of the non traditional machining process. Analytic hierarchy process, analytic network process introduction. What are nonconventional machining processes engineers. An overview of the various issues involved in the conventional machining of the main types of. Non conventional machining processes, multicriteria decision making, selection, moora method. Non traditional machining processes like usm,ecm,edm,ebm are an. Seminar on non conventional machining report download abstract. Nontraditional machining the definitive guide machinemfg. Machining a shearing process in which excess materials is removed by cutting tools.
Mechanical machining i abrasive jet machining, ultrasonic machining usm and waterjet machining wjm are typical examples of single action, mechanical non traditional machining processes. Cutting involves singlepoint or multipoint cutting tools, each with a clearly defined geometry. Examples of traditional machining processes are turning, boring, milling, shaping, broaching, slotting, grinding etc. These requirements, and the resulting commercial and technological importance of these processes include. The plasma process is equally suited to manual and automatic applications. 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. Students will able to implement explosive energy and high energy beam to welding process. Chip types d continuous chip with large primary shear zone soft metals at low speeds and low rake angles poor surface finish residual stresses me 338. What is hybrid manufacturing and classification of hybrid.
The non traditional machining methods include, ultrasonic machining, laser beam machining, water jet machining, abrasive water jet machining, electron beam machining, etc. Chemical machining cm photochemical machining pcm 2. In this process, high velocity water jet strikes at working surface and metal removed due to erosion by water particle. Innovative geometric design of products and components made of new exotic materials with desired tolerance, surface finish cannot be produced economically by conventional machining. Traditional machining tm introduction in these traditional or conventional machining processes, machine tools, such as lathes, milling machines, drill presses, or others, are used with a sharp cutting tool to remove material to achieve a desired geometry. What are the various mechanical energy methods of ucm. Unit ii mechanical energy based processes 10 abrasive jet machining water jet machining abrasive water jet machining ultrasonic. Jul 25, 2020 chemical energy based unconventional machining. Classification of nontraditional processes by type of energy used mechanical erosion of work material by a high velocity stream of abrasives or fluid or both is the typical form of mechanical action electrical electrochemical energy to remove material reverse of electroplating thermal thermal energy usually applied to small portion of work surface, causing that portion to be removed by fusion andor vaporization chemical chemical etchants selectively remove material from. The introduction of abrasives to the fluid jet enhances the machining. Ultrasonic machining is a non conventional subtractive machining process that is widely used in industries to machine brittle and harder materials. A mechanical conventional single cutting or ma action process can be combined with the respective machining phases of electrodischarge ed in electrodischarge machining edm or ecd in ecm. Seminar on non conventional machining report download.
Non traditional manufacturing processes is defined as a group of processes that remove. Ultrasonic machining is a non traditional process, in which abrasives contained in a slurry are driven against the work by a tool oscillating at low amplitude 25100. This is due to material removal rate mrr decreases with increased hardness of the work material. Provide basic shape and size a free powerpoint ppt presentation displayed as a flash slide show on id. In this video learn about seven non traditional machining process.
The process was first developed in 1950s and was originally used for finishing edm. Non traditional machining ntm processes are now being widely used to generate intricate and accurate shapes in materials, like titanium, stainless steel, high strength temperature resistant. Similarly, abrasive jet machining ajm, ultrasonic machining usm, water jet and abrasive water jet machining wjm and awjm, electrodischarge machining edm are some of the non traditional machining ntm processes. Why conventional mechanical machining process is not so effective on soft metals like aluminium. Nonconventional machining process includes abrasive jet machining ajm, water jet machining. To learn about various unconventional machining processes, the various process. Nontraditional processes ntp nontraditional cutting. The cutting tool and work piece are there is no physical contact between always in physical contact with the tool and work piece, in some non relative motion with each other, traditional process tool wear exists. What and different types of non conventional machining.
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