The cutting tool and work piece are always in physical contact with relative motion with each other, which results in friction and tool wear. There is no physical contact between the tool and work piece, in some non. Book download link provided by engineering study material esm. 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. Nonconventional machining nm ac7116nadcap audit criteria for nonconventional machining ecm, ecg, edm, lbm, lpm, seg. The wire edm process can cut intricate components for the electric and aerospace industries. Jain department of mechanical engineering, indian institute of technology kanpur, kanpur208016, india. Introduction conventional machining process metal is removed by means of tool which is harder than work piece and they both are in contact with each other demerits of conventional machining process. Senthil kumar, ars publications the book unconventional machining processes for engineering and technology studies. 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. Unconventional machining processes textbook pdf free. Professor elhofy wrote his first book titled advanced machining processes. Nonconventional machining processes selection using multiobjective 1449 journal of engineering science and technology november 2015, vol.
The alternative is such case is application of unconventional manufacturing technologies ump. Comparison between conventional and nonconventional machining. In 1926, the first saw which worked with electricity was invented by andreas stihl. Unconventional machining processes textbook pdf free download unconventional machining processes textbook pdf free download. On the contrary, nonconventional sources of energy are described as the energy sources whose evolution has been done in the recent past and has gain popularity since then. Brief introduction of nonconventional machining processes.
Machining processes produce finished products with a high degree of accuracy and surface quality. A machining process is called non traditional if its material removal mechanism is basically different than those in the traditional processes, i. Completely revised and updated, this second edition of fundamentals of machining processes. The usm process is effectively used to machining conductive and nonconductive materials. Material al2o3 sic glass beads shape irregular spherical size 10 50. 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. Difference between conventional machining and nontraditional machining ntm pintu 27042019 ntm by definition, machining is one of the secondary manufacturing processes by which excess material is gradually removed by shearing from a preformed blank in the form of solid chips using a wedge shaped cutting tool in order to get desired shape. These processes are generally used when traditional methods are not technically or economically feasible. 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. In ecm process the material dissolution occurs when the workpiece is made an anode in an electrolytic cell. The book provides insight into the use of some basic processes existing today in the domain of nonconventional manufacturing machining. Turning is a common operation used for production of these parts where cutting speed, and thus the material removal rate, is limited due to high tool wear rate.
After achieving the merits of nonconventional machining methods, efforts are being made for crossprocess innovations to improve the machining characteristics. Conventional machining uses tools, such as lathes, milling machines, boring machines, drill presses, or. Nonconventional machining involves using various techniques to transform traditional manufacturing from using typical cutting tools to other types of energy or materials to perform the same function. Jan, 2016 manufacturing process technology part i 28,171 views. Introduction to nontraditional machining iit kanpur. Pdf unconventional machining processes local author by. Selection of nonconventional machining processes using the ocra method article pdf available in serbian journal of management 101 september 2014 with 1,732 reads how we measure reads. To learn about various unconventional machining processes, the various process parameters and their influence on performance and their applications. This advanced technological process allows for programming to ensure consistency and repeatability. Difference between conventional machining and non traditional machining ntm pintu 27042019 ntm by definition, machining is one of the secondary manufacturing processes by which excess material is gradually removed by shearing from a preformed blank in the form of solid chips using a wedge shaped cutting tool in order to get desired shape. Manufacturing process technology part i 28,171 views.
Traditional machining processes consist of turning, boring, drilling. In unconventional machining, a form of energy is used to remove unwanted material from a given workpiece. We have courses designed for operators, planners, process owners and internal auditors, targeting the unique needs of each position and their respective roles in successful nadcap certification audits. The difficulty to cut materials encouraged efforts that led to the introduction of the unconventional machining. Some machining processes are combined together for achieving higher machining rates, greater product accuracy, and the best possible surface. Conventional and nonconventional processes written by hassan abdel gawad elhofy covers the fundamentals machining by cutting, abrasion, erosion and combined processes. Non conventional machining processes selection using multiobjective 1449 journal of engineering science and technology november 2015, vol. Pdf the role of nonconventional machining processes ncmps in todays manufacturing environment has been well acknowledged. This book is mainly useful for mechanical engineering students. Manufacturing processes can be broadly divided into two groups and they are primarymanufacturing processes and secondary manufacturing processes. Conventional machining processes and machine tools module. Nonconventional machining processes as viable alternatives for production with. The new edition has been expanded with two additional chapters covering the concept of machinability and the roadmap for selecting machining processes that meet required. Fundamentals of machining processes by hassan abdel contains total 16 chapters, such as cutting tools, maintainability, micro machining, high speed machining, abrasives etc.
The common non traditional machining processes are described in this section. 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. This is due to material removal rate mrr decreases with increased hardness of the work material. Pdf selection of nonconventional machining processes. Unconventional machining process unit 1 introduction prepared by s. What are the design factors to be considered while selecting the machine tool. Hence the machining process which utilizes other machining methods are termed as unconventional. 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. A machining process is called nontraditional if its material removal mechanism is basically different than those in. Conventional and nonconventional processes is the first textbook to collect all of the major methods. Nontraditional and hybrid processes which has been published by mcgraw hill co in march 1, 2005.
His second book titled fundamentals of machining processesconventional and nonconventional processes has been appeared in september 2007 by crc, taylor and francis. Buy nonconventional machining book online at low prices in. Tool may not be harder and it may not be physical presence. Nov 26, 2014 machining of difficulttocut materials such as hightemperature metals is challenging due to their low machinability resulting in reduced productivity and high manufacturing cost. Increasing tool life in machining of difficulttocut. The usm is effective and particular for all brittle materials 11, 5. 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. Its materialremoval mechanism includes impacting and hammering. Unconventional machining processes textbook is one of the famous textbook for engineering students. This textbook is also useful to most of the students who are preparing for competitive exams. The advent of hard materials for aerospace applications have made the machining process by conventional methods very difficult and time consuming. Nonconventional machining by erosion of the workpiece material regardless of their mechanical properties has emerged to tackle problems associated with cutting or abrasion processes.
Examples of conventional machining processes are turning, boring, milling, shaping, broaching, slotting. This paper descri bes progress with respect to present situation and future trends in nonconventional machining. List down various mechanical energy based unconventional machining processes the various. Please switch to hard cover of fundamentals of machining process. Jun 20, 2016 the advent of hard materials for aerospace applications have made the machining process by conventional methods very difficult and time consuming. The aim of the mtcs non conventional 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. Dec 29, 2015 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. Advancedunconventionalnon traditional machining process an. While making a part from raw material, one may require bulk removal of material, forming cavitiesholes and finally finishing as per the parts requirements. However, machining processes inevitably waste material in the form of chips, production rates may be low, and unless carried out properly, the processes can have detrimental effects on the surface properties and performance of parts. Differences between conventional and non conventional machining processes. This book is written to serve the needs of under graduate students embarking introductory course in.
Nielsen book data summary completely revised and updated, this second edition of fundamentals of machining processes. Me2026 unconventional machining process 10 sce department of mechanical engineering 2. The introduction of abrasives to the fluid jet enhances the machining efficiency and is known as abrasive water jet machining. Difference between conventional and nonconventional.
Unconventional machining processes introduction and. Applications of electric discharge machining process. Mechanical machining ultrasonic machining usm and waterjet machining wjm are typical examples of single action, mechanical non traditional machining processes. The process is actually the reverse of electroplating with some. In 1950, he invented first portable saw which has a motor.
Conventional machining process involved tool wearing as there is a physical contact between the tool and the work piece. After achieving the merits of non conventional machining methods, efforts are being made for cross process innovations to improve the machining characteristics. Fundamentals of machining processes by hassan abdel contains total 16 chapters, such as cutting tools, maintainability, micromachining, high speed machining, abrasives etc. History the early ancestors of modern humans, likely first used a jawbone of bovid animals as a saw.
Therefore, there is a need for alternative techniques. Non traditional manufacturing processes an overview. Machining remains a hugely important process in modern engineering and manufacturing practice, and students need to be aware of the vast host of methods and technologies available to meet all sorts of precision and surface finish requirements. In unconventional machining, a form of energy is used to remove unwanted material from a. Comparison between conventional and non conventional machining. So, due to this, edm is particularly useful in machining of small holes, orifices, slots in diesel fuel injection nozzles, airbrake valves and aircraft engines etc. Conventional machining utilizes cutting tools that must be harder than workpiece material. The new edition has been expanded with two additional chapters covering the concept of machinability and the roadmap for selecting machining processes that meet. Machining of difficulttocut materials such as hightemperature metals is challenging due to their low machinability resulting in reduced productivity and high manufacturing cost. No conventional nonconventional 1 direct contact of tool and workpiece. The former onesprovide basic shape and size to the material as per designers requirement. In elastic emission machining process, machining is carried out by a spinning polyuerathane ball in a suspended liquid medium of fine abrasives 0.
Until at least the mid19th century, saws were made laboriously by hand. Difference between conventional and non conventional machining processes are. Nonconventional machining utilizes other forms of energy. Nonconventional manufacturing processes is defined as a group of processes that remove excess material by various techniques involving mechanical, thermal. All questions carry equal marks 1 a classify unconventional machining processes based on basic mehanism involved in the process and medium for tranfer of enrgies and type of energy. The machining medium is solid grains suspended in an abrasive slurry in the former,while a fluid is employed in the wjm process. Of course, you should know what is nonconventional machining process which is defined as the process in which materials are removed from the workpiece in most accurate and effective mannar. His second book titled fundamentals of machining processes conventional and nonconventional processes has been appeared in september 2007 by crc, taylor and francis. The basic difference between conventional and nonconventional sources of energy is that conventional sources of energy, as the name suggests, are those sources which are widely used all around the world since ages. An unconventional machining process or non traditional machining process is a special type of machining process in which there is no direct contact between the tool and the workpiece. Pdf nonconventional machining processes selection using multi.
In addition to these conventional methods, there is a group of processes that use. The role of nonconventional machining processes ncmps in todays manufacturing environment has been well acknowledged. Pdf nonconventional machining processes selection using. A new nontraditional machining method using cavitation. Conventional and nonconventional processes book pdf by hassan abdelgawad elhofy machining remains a hugely important process in modern engineering and manufacturing practice, and students need to be aware of the vast host of methods and technologies available to meet all sorts of precision and surface. In 1927, emil lerp invented a saw that works with using oil in germany. The usm process is effectively used to machining conductive and non conductive materials. When ball approaches the workpiece surface, collision with abrasive takes place within an area of 12 mm diameter and amount of material removal depends on the machining time.
Nonconventional machining introduction, ajm, wjm, usm. Electrochemical machining is one of the most unconventional machining processes. Tools are nonconventional technique like laser beam, electric arc etc. Process parameters and machining characteristics abrasive. Non conventional tools are more accurate and precise than the conventional tool. No conventional non conventional 1 direct contact of tool and workpiece. Unconventional machining process sasurie college of engineering.
Lecture11nonconventional machiningintroduction, ajm. Conventional and nonconventional processes covers the fundamentals machining by cutting, abrasion, erosion, and combined processes. Tools are non conventional technique like laser beam, electric arc etc. Features such as smooth shiny surfaces, smalldiameter deep holes in a part, threaded section, and threaded holes all require further manufacturing operations. Turning operation is a machining process and is used to produce round parts in shape by a single point cutting tool.