The processes described in this chapter are often called nontraditional machining ntm. Several types of non traditional machining processes have been developed to meet extra required machining conditions. The machining medium is solid grains suspended in an abrasive slurry in the former,while a fluid is employed in the wjm process. 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. Common non traditional machining methods electrical discharge machining edm. Introduction to nontraditional machining slideshare. Non conventional machining processes enable us to get consistency and accuracy in our desired manufacturing techniques.
Electrical discharge machine the traditional machining processes rely on harder tool or abrasive material to remove the softer material whereas nontraditional machining processes such as edm uses electrical spark or thermal energy to erode unwanted material in order to create desired shape. They generally have low densities and low rigidity. Principles, tools, and methods 7 naturally, during the average work shift, additional parts will be required for the workcell. Difference between conventional and non conventional machining processes are. Non traditional machining traditional machining is mostly based on removal of materials using tools that are harder than the materials themselves. Nontraditional manufacturing processes introduction 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. Mechanical machining ultrasonic machining usm and waterjet machining wjm are typical examples of single action, mechanical non traditional machining processes. New and novel materials because of their greatly improved chemical, mechanical and thermal properties are sometimes impossible to machine using traditional machining processes. 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. Ramkumar department of mechanical engineering iit kanpur march 26, 2018. Nontraditional manufacturing processes is defined as a group of processes that remove excess material by. These include mechanical, electrical, thermal, and chemical methods. Unconventional machining processes introduction and.
This process uses thermal energy to remove material from metallic or nonmetallic surfaces. Advanced non traditional machining processes 315 this equation can be used to calculate the linear material removal rate mrr l by dividing it by cross sectional a rea a r of the tool or. Most polymers are non crystalline, but some consist of mixtures of both crystalline and non crystalline regions. Very hard fragile materials difficult to clamp for traditional machining when the workpiece is too flexible or slender. The common non traditional machining processes are described in. Non traditional machining non traditional machining.
Water jet machining wjm is a mechanical energy based non traditional machining process used to cut and machine soft and non metallic materials it involves the use of high velocity water jet to smoothly cut a soft workpiece. These involve electrolyte type, rate of electrolyte flow, and some other process conditions. These methods form a group of processes which removes excess material by various techniques involving mechanical, thermal, electrical chemical energy or combination of these energies. Primary manufacturing processes this provide basic shape and size to the material as per designer. Nontraditional machining ntm lecture notes, ebook for final. Introduction to nontraditional machining processes machining. Introduction to ntm, edm, usm, ajm, non conventional machining techniques.
The lesson introduced to the manufacturing methods available for making a component. Non traditional machining ntm or non conventional machining ncm, is a kind of machining technology which is different from traditional machining process and equipment. The part below was machined on a 5axis makino a77 at boeing using a 815k rpm spindle speed, and a feed of 240 ipm vs 60 ipm conventional machining. The main reasons for choosing non traditional machining processes are. Traditional methods of resupplying workstations are not useful in a lean workcell. In unconventional machining, a form of energy is used to remove unwanted material from a. The traditional machining methods, even with added cnc features, are unable to meet such stringent demands of various industries such as aerospace, electronics, automobiles, etc.
This article discusses the various categories of nontraditional machining processes that are subdivided according to the form of energy being harness. Manufacturing processes can be broadly divided into two groups 1. Non traditional machining techniques introduction to non traditional machiniing techniques by mr. This ppt gives brief introduction on various nontraditional machining techniques.
It is a material cutting process that engages an abrasive tool whose cutting elements are grains of. Introduction to non traditional manufacturing unacademy. Pdf nontraditional machining processes selection using. Humans have been using machines for centuries, starting with primitive techniques and moving forward to the level of technology, precision, and efficiency that we experience today. The working principles and the applications of some of these processes are discussed in this chapter. Non traditional manufacturing processes an overview introduction non traditional 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. The country has greater confidence to take on the competition from. Introduction to computer integrated manufacturing cim. Non traditional manufacturing processes an overview. Metal matrix composite, surface analysis, machining introduction aluminum metal matrix composites ammcs are making in roads in various engineering applications requiring higher strength and stiffness than those offered by conventional aluminum alloys. This article discusses the various categories of nontraditional machining processes that are subdivided according to the form of energy being harnessed. Carl sommer, author of over 50 books, is uniquely qualified to author this book on non traditional machining. As a result, a new class of machining processes has evolved over a period of time to meet such demands, named non traditional, unconventional, modern or advanced.
High speed machining and assembly high speed machined aluminum parts are replacing builtup parts made by forming and assembly riveting in the aerospace industry. Cannot be used for machining castings or hot rolled steel, since hard outer scale will damage the cutter. An introduction and need for non traditional manufacturing is explained along with common principles employed in them. It is similar to abrasive jet machining ajm in water jet machining, high velocity water jet is allowed to strike a given workpiece. Introduction machining processes, which include cutting, grinding, and various non mechanical chipless processes, are desirable or even necessary for the following basic reasons.
Introduction to nontraditional machining process free download as powerpoint presentation. 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. Situations where traditional machining processes are unsatisfactory. Grinding grinding is the most common form of abrasive machining. A brief introduction to machining bp precision machining.
Difference between conventional and nonconventional. Non traditional machining free download as powerpoint presentation. The important feature of this collection is that the questions asked in previous examinations have been included as they were asked in the question papers. Several types of nontraditional machining processes have been developed. It also includes chapters on outsourcing, purchasing equipment, building a successful business, and closes with a chapter on the future revolutionary non traditional machine. Introduction to nontraditional machining processes. Introduction to non traditional machining processes prof. Pdf nontraditional machining nontraditional machining. Most polymers are poor electrical conductors due to the nature of the atomic bonding. Traditional machining processes consist of turning, boring, drilling, reaming, threading, milling, shaping, planing, and. Nontraditional machining, utilizing electrical, chemical, and. This presentation gives an information about introduction to nontraditional machining covering the syllabus of non traditional machining. Pdf selection of nontraditional machining process researchgate.
Any damaged, broken, or unsafe equipment will be reported to lab personnel immediately. Conventional machining uses tools, such as lathes, milling machines, boring machines, drill presses, or. Advanced nontraditional machining processes 321 the magnetic abrasive particles join eac h other magnetically between two mag netic poles s and n along the ma gnetic lines of force, forming. Metal cutting refers to processes in which excess metal is removed by a harder tool, through a process of extensive plastic deformation or controlled fracture.
Lecture notes on modern manufacturing process dr pramod. 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. It combines the physical energy electricity, magnetism, sound, light and heat, chemical energy and even mechanical energy to applied on the machining position. Pdf nontraditional machining ntm processes are now being widely used to generate. Non traditional 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. Nontraditional machining processes selection using data envelopment analysis dea article pdf available in expert systems with applications 387. Examples of conventional machining processes are turning, boring, milling, shaping, broaching, slotting, grinding etc. 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. Nontraditional machining the definitive guide machinemfg. 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. Exercises 6 summary summary the edition addresses issues essential to modern manufacturing, ranging from traditional topics such as casting, forming, machining, and joining, to advanced topics such as the fabrication of nanomaterials. Users are responsible for knowing the correct operating procedures and any associated safety rules for.
Conventional machining process involved tool wearing as there is a physical contact between the tool and the work piece. Introduction to nontraditional machining iit kanpur. Nontraditional machining employs processes that remove material by various methods involving thermal, electrical, chemical and mechanical energy or even. Machining operations are usually divided into two categories. The traditional machining processes rely on harder tool or abrasive material to remove the softer material whereas nontraditional machining processes such as edm uses electrical spark or thermal energy to erode unwanted material in order to create desired shape. When these processes are employed properly, they offer many advantages over non traditional machining processes.
Traditional standalone nc machine tool is characterized as a limitedstorage, automatic tool changer and is traditionally operated on a onetoone machine to operator ratio. Nontraditional machining processes semantic scholar. Each worker should go about his work with the minimum number of interruptions. Non traditional machining jagadeesha t, assistant professor, med, national institute of technology, calicut introduction to ntm types of manufacturing processes. Non conventional tools are more accurate and precise than the conventional tool. New and novel materials because of their greatly improved chemical, mechanical and thermal properties are sometimes impossible to machine using traditional. No non metallic materials will be machined without prior approval. Mechanical, materials and manufacturing engineering. Pdf nontraditional machining introduction riza nur. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Limitations of conventional machining methods i increased workpiece hardness. Advancements in nonconventional machining of aluminum. Edm is a kind of non traditional machining method which is used to etch conductive material by electric erosion which is produced by the pulse discharge between two poles immersed in working liquid, also known as discharge machining or electroerosion machining. Advancements in non conventional machining of aluminum metal matrix.
It makes possible to work with metals for which traditional machining techniques are ineffective. 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. Edm is a machining method typically used for hard metals which are electrically conductive. Hence the machining process which utilizes other machining methods are termed as unconventional machining or non traditional machining or advanced machining processes or modern machining processes. Pdf non traditional manufacturing introduction diki. In many cased, standalone nc machine tools have been grouped together in a conventional part family manufacturing cell. 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. Non traditional 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.
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