The common non traditional machining processes are described in this section. This group includes chemical milling, photochemical machining, and thermo chemical machining. That has all been changed, since the publishing of carl sommer s latest book, the non traditional machining handbook. Advanced nontraditional machining processes 303 work. Sharma, department of mechanical engineering, iit roorkee. 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. Traditional edged cutting toolbased machining processes are now being continuously replaced by nontraditional machining ntm processes so as to generate complex and intricate shapes on advanced and harder materials, like titanium, stainless steel, highstrength temperatureresistant alloys, fiberreinforced composites, and engineering ceramics. Review of basic machining processes and the mechanics of chip formation duration. 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. For example, abrasive water jet operations use mechanical energy, but material is removed by erosion. Electrolysis is based on faraday laws of electrolysis which is stated as.
Principles of nontraditional machining processes machining. Jain advanced machining processes allied publishers pvt. Abrasive particles in the fluid contact raised features on the surface of the workpiece and remove them. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. If you like this article, dont forget to share it on your social networks. The lectures would introduce the basic principles of material removal by impact erosion by use of abrasives against hard and brittle materials. Advantages and limitation of non traditional machining. Electrical discharge machining edm has emerged as an outstanding approach for cutting conductive metals that are otherwise difficult or impossible to be cut with traditional machining 1. Now everyone can become knowledgeable as to what these processes are capable of, how they work, and the advantages they offer over the more traditional machining technologies. Paul,department of mechanical engineering, iit kharagpur. Jun 20, 2016 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. 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. Nontraditional machining processes flashcards quizlet.
The former onesprovide basic shape and size to the material as per designers requirement. Manufacturing processes can be broadly divided into two groups and they are primarymanufacturing processes and secondary manufacturing processes. 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. Difference between conventional machining and nontraditional. Med, national institute of technology, calicut machining chamber it is well closed so that concentration of abrasive particles around the working chamber does not reach to the harmful limits. Nontraditional machining processes selection using evaluation. What is hybrid manufacturing and classification of hybrid machining process technological improvement of machining processes can be achieved by combining different machining actions or phases to be used on the material being removed. 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 introduction and.
New and novel materials because of their greatly improved chemical, mechanical and thermal properties are sometimes impossible to machine using traditional machining processes. The lectures would introduce to the students the basic principles of material removal by impact erosion by use of abrasives against hard and the brittle materials. The chemical machining processes include those wherein material removal is accomplished by a chemical reaction, sometimes assisted by electrical or thermal energy applications. Modern machining processes tata mcgrawhill, new delhi, 2007. Non traditional machining jagadeesha t, assistant professor. Advanced machining processes nptel online videos, courses.
Conventional machining processes and machine tools pdf plz post vijay. Introduction to nontraditional machining iit kanpur. The non traditional machining methods include, ultrasonic machining, laser beam machining, water jet machining, abrasive water jet machining, electron beam machining, etc. A new nontraditional machining method using cavitation process. 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.
Electrochemical machining ecm is a non traditional machining process uses the principle of faraday to remove metal from the workpiece. Brief introduction of nonconventional machining processes. Modern machining methods are also named as non conventional machining methods. Electrochemical machining, electroplating or electro discharge machining are the examples work on this principle. Mar 18, 20 the economics of precision machining can be understood with just 4 factors machining cost, material cost, tool cost, and cost of non productive time setup costs. If you have any query regarding this article, ask by commenting. Machining processes have existed for a long time but it was only after the scientific study of these processes which started some fifty years ago that major improvements in tool design, tool materials and machining techniques where brought about. I high mrr i high production rate while processing di cult to machine.
Particularly suited for very hard andorbrittle materials such asgraphite, glass, carbide, and ceramics. It is similar to abrasive jet machining ajm in water jet machining, high velocity water jet is allowed to strike a given workpiece. Ultrasonic machining is a mechanical type non traditional machining process. May 19, 2014 nontraditional machining can be thought of as operations that do not use shear as their primary source of energy. The technology of the manufacturing processes will be explained in detail. Conventional machining also costs in terms of tool wear and in loss of quality in the product owing to induced residual stresses during manufacture. Nonconventional machining processes as viable alternatives. Nocphase equilibria in materials nature and properties of materialsii. Me 338 manufacturing processes ii department academic.
Non traditional machining processes linkedin slideshare. I high surface nish nanolevel ra value i miniaturization of products examples. Download nontraditional manufacturing processes by gary f. Brief overview and introduction to electrochemical machining, electrode discharge machining, ultrasonic machining, abrasive jet machining, material removal r. New and novel materials because of their greatly improved chemical, mechanical and thermal properties are sometimes impossible to machine using traditional. Waterjet machining hydrodynamic machining pressure. Manufacturing processes i nptel online videos, courses. Classification of nontraditional machining is based on following factors. 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. Non traditional machining is also called advance manufacturing process.
This book is an attempt to consolidate the basic scientific studies in the machining area so that fundamental. Jul 21, 2012 the most typical electrolyte is an ionic solution, but molten electrolytes and solid electrolytes are also possible. Non traditional manufacturing processes an overview. Lecture series on manufacturing processes i by prof. Electric discharge machining is a thermoelectric non traditional machining process. With ever increasing demand for manufactured goods of hard alloys and metals, such as inconel 718 or titanium, more interest has gravitated to non conventional machining methods. High speed machining and assembly high speed machined aluminum parts are replacing builtup parts made by forming and assembly riveting in the aerospace industry. In addition, non traditional manufacturing processes, like electrodischarge machining edm, laser beam machining, plasma cutting etc are also a part of this course. Nontraditional machining processes selection using data envelopment analysis dea article pdf available in expert systems with applications 387. Non traditional machining is recommended when we need which of the following features. In the process, workpiece is taken as anode and tool is taken as cathode. 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.
Function of electrolyte carrying current between tool and work peice remove products of machining and other insoluble products from cutting region dissipate heat produced in the operation. Pdf nontraditional manufacturing processes by gary f. Lecture series on manufacturing processes ii by prof. Since material costs and nonproductive costs are constant, they are combined into the fixed cost line at the bottom. Several types of non traditional machining processes have been developed to meet extra required machining conditions. Electric sparks are generated between two electrodes when the electrodes are held at a small distance from each other. Electricaldischarge machining is based on the erosion of metals by spark discharge.
How is classification of nontraditional machining done. It includes detailed information to gain insight into the manufacturing processes which are new, unconventional and list out the the. 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. It combines the physical energy electricity, magnetism, sound, light and heat, chemical energy and even mechanical energy to applied on the machining position. The main reasons for choosing non traditional machining processes are. 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. Subscribe our channel for more interesting articles. Processes likeabrasive jet machining water jet machininglaser beam machininghot machiningplasma arc machininghave also been included.
This course will define the areas of application of traditional as well as non traditional nachining finishing processes in the manufacturing industry. Mar 30, 2017 non traditional machining process 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. 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 microns and high frequency 1530 khz. It includes detailed information to gain insight into the manufacturing processes which are new. In unconventional machining, a form of energy is used to remove unwanted material from. Non traditional machining processes s5me complied by. Advanced non traditional machining processes 327 27 komanduri r 1996 on material removal m echanism in. It is an electro deposition process, so there is no formation of burrs, haz or other edge defects. Nontraditional machining processes semantic scholar. There is no cutting of metal with the help of metallic tool having sharp cutting edge.
This is all about non traditional machining process, requirements, types, advantages and disadvantages. Ultrasonic machining is a mechanical type non traditional machining. Chemical machining 632014 hareesha n g, dept of aero engg, dsce 2 3. Synthetic sapphire wear resistant impinging pressure compressive stress soft non metals, plastics, etc. When these machines are employed, they are many advantages over the traditional machining process.
All aspects of mechanical, electrochemical and thermal processes are comprehensively covered. 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. A circular hole of 25 mm diameter and depth of 20 mm is machined by edm process. 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. The two electrodes workpiece and tool is immersed in an electrolyte such as nacl. Regarding these, non traditional machining ntm processes have been developed since the world war ii largely in response to new, challenging, and unusual machining and or shape requirements 4. In this category of non traditional machining electrical energy is used in the form of electrochemical energy or electroheat energy to erode the material or to melt and vapourized it respectively. Nontraditional machining traditional machining is mostly based on removal of materials using tools that are harder than the materials themselves. Nontraditional machining techniques for fabricating metal. A mechanical conventional single cutting or ma action process can be combined with the respective machining phases of electrodischarge. Non traditional machining ntm or non conventional machining ncm, is a kind of machining technology which is different from traditional machining process and equipment.
As the voltage builds up, eventually the fluid breaks down and sparks. This will generate high heat energy and melts and vaporize metal from work piece. Ultrasonic machining national institute of technology. The process of metal removal by electro chemical dissolution was known as. Noc non traditional abrasive machining processes ultrasonic, abrasive jet abrasive water jet machining. This course will define the areas of application of non traditional abrasive machining processes in the manufacturing industry. Non traditional abrasive machining processes ultrasonic.
The tool acts a cathode, and is immersed in a dielectric insulating fluid, and the workpiece acts as an anode. Introduction electrochemical machining ecm is one of the newest and most useful non traditional machining ntm process belonging to electrochemical category. Ultrasonic machining introduction ultrasonic machining is a non traditionalmechanical means of uniform stock materialremoval processit is applicable to both conductive andnonconductive materials. Product requirement i complex shapes i machining in inaccessible areas i low tolerances say, 0. Examples of conventional machining processes are turning, boring, milling, shaping, broaching, slotting, grinding etc. When these processes are employed properly, they offer many advantages over non traditional machining processes. Electrochemical machining ecm is a machining process in which electrochemical process is used to remove materials from the workpiece. Nontraditional machining the definitive guide machinemfg.
The course is aimed at teaching the pros and cons of different processes, so that one can apply this knowledge to the selection of a process for making a part to the required. Jagadeesha t, assistant professor, national institute of technology, calicut. In unconventional machining, a form of energy is used to remove unwanted material from a given workpiece. Non traditional machining traditional machining is mostly based on removal of materials using tools that are harder than the materials themselves. 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. Mechanical machining i jet machining and ultrasonic machining usm are typical examples of single action, mechanical non traditional machining processes. His main research interests are micro fabrication and non traditional machining technologies. What is hybrid manufacturing and classification of hybrid. Several types of non traditional machining processes have developed to better machining condition. Pdf nontraditional machining processes selection using.
Pdf while making a part from raw material, one may require bulk removal of material, forming cavitiesholes and finally finishing as per the. Nontraditional processes ntp nontraditional cutting processes. Material is removed from the workpiece through localized melting and vaporization of material. It is a non traditional machining process in which no physical tool is used.
For the love of physics walter lewin may 16, 2011 duration. Non traditional machining questions and answers sanfoundry. Lecture on non conventional machining process by mech zone. Modern machining processes presents unconventional machining methods which are gradually commercial acceptance. I the machining medium is solid grains suspended in an abrasive slurry. Electron beam machining is same as laser beam machining process in which except laser, high speed electron beam impinges on work piece. Machining chamber is equipped with vacuum dust collector. Nontraditional manufacturing processes is defined as a group of processes that remove. Jan, 2016 lecture 35 non traditional manufacturing duration.
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