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 finish requirements. This site is like a library, use search box in the widget to get ebook that you want. Each process has distinct capabilities and is suitable for specific purposes. Non traditional machining is also called advance manufacturing process. Pdf selection of the most suitable nonconventional machining process ncmp for a given machining application can be viewed as.
Pdf unconventional machining processes local author by. 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. They are used for the production of spare parts and smaller series of products even just 1 piece which are just as necessary in different productions. What is the difference between conventional and non conventional machining processes or how the non conventional machining process differs. Material removal processes once again can be divided into mainly two groups and theyare conventional machining processes and nontraditional manufacturingprocesses. The cutting tool and work piece are always in physical contact with relative motion with each other, which results in friction and tool wear. Non conventional machining free download as powerpoint presentation. Nontraditional machining, utilizing electrical, chemical, and optical sources of energy. 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.
Introduction to nontraditional machining iit kanpur. Difference between conventional and nonconventional. Differences between conventional and non conventional machining processes. This process cannot be applied to the largesized workpiece, as size for the workpiece is helpless by the size of setup. Tool may not be harder and it may not be physical presence. Nontraditional machining, also known as nonconventional machining or modern machining method, generally refers to the machining method of removing or adding materials with energy of electricity, heat energy, light energy, electrochemical energy, chemical energy, sound energy and special mechanical energy, so as to realize materials being removed, deformed, changing properties or being plated. Material removal processes are mainly thesecondary manufacturing processes. Several types of nontraditional machining processes have been developed to meet. Nonconventional machining processes free download as powerpoint presentation. Classification of non traditional machining is based on following factors. Both are machining processes and thus used for removing excess material. Introduction, equipment and material process, effect of process parameters.
Conventional machining processes are often placed in three categories single point cutting, multipoint cutting, and abrasive machining. This book is written to serve the needs of under graduate students embarking introductory course in unconventional machining processes. Difference between conventional and nonconventional machining processes are. Learn different types of unconventional machining process and advance machines.
Mechanical machining ultrasonic machining usm and waterjet machining wjm are typical examples of single action, mechanical non traditional machining processes. Abstract the modern machining methods also known as nontraditional machining ntm processes utilize sources of energies like mechanical, thermal. Similarities between conventional machining and ntm. Subscribe our channel for more interesting articles. The adequate form of the high value of mrr can be achieved as compared to other nonconventional machining processes. Tools are nonconventional technique like laser beam, electric arc etc. Various similarities and differences between conventional machining and non traditional machining ntm processes are given below in table format.
What is the difference between conventional and non. The advent of hard materials for aerospace applications have made the machining process by conventional methods very difficult and time consuming. 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. This is all about non traditional machining process, requirements, types, advantages and disadvantages. 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. Materials are removed by traversing in a direction parallel to the axis of.
Nontraditional machining the definitive guide machinemfg. Non conventional machining non conventional 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. Non conventional manufacturing process conventional manufacturing. In conventional machining process a tool, which is harder than the work piece is forced on the work piece. Modern machining processes download ebook pdf, epub. No conventional nonconventional 1 direct contact of tool and workpiece. There is no physical contact between the tool and work piece, in some non. In view of these limitations, many nontraditional machining ntm methods h been developed since world war. Ultrasonic machining usm and waterjet machining wjm are typical examples of single action, mechanical non traditional machining processes. Pdf unconventional machining processes senthil kumar. These processes are generally used when traditional methods are not technically or economically feasible. Electrical discharge machining edm is one of the most widely used non traditional.
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. Nadcap nonconventional machining ac7116 expert resource. All questions carry equal marks 1 how will you analyze the applicability of different processes to different types of materials, namely metals, alloys, and non metals. Machining processes, which include cutting, grinding, and various non mechanical chipless processes, are desirable or even necessary for the following basic reasons. 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. This paper gives an introduction and a brief overview of various unconventional processes that are in practice nowadays. Unconventional machining processes introduction and. The aim of the mtcs nonconventional 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. If you have any query regarding this article, ask by commenting. Pdf nonconventional machining processes selection using multi. Non conventional machining processes may use chemical or thermal means of removing material. Nonconventional tools are more accurate and precise than the conventional tool. Module 2 machining processes engineering laboratory ee100. All subtractive type manufacturing process are conventional manufacturing process in which w.
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. Pdf the role of nonconventional machining processes ncmps in todays manufacturing environment has been well acknowledged. Several types of non traditional machining processes have developed to better machining condition. The machining medium is solid grains suspended in an abrasive slurry in the former,while a fluid is employed in the wjm process. Conventional machining in addition to modern cnc machines, we also have machines for conventional machining which are indispensable for our production. Each process in these categories is uniquely defined by the type of cutting tool used and the general motion of. 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. Machining is any of various processes in which a piece of raw material is cut into a desired final shape and size by a controlled materialremoval process. Examples of conventional machining processes are turning, boring, milling, shaping, broaching, slotting, grinding etc. In conventional metal machining, oxygen is usually used, taking advantage of an exothermic chemical reaction to enhance the machining process, but argon or nitrogen are also used with cmcs. Nonconventional machining processes machining electrochemistry. The conventional machining processes are not capable of machining hard and heat resisting materials into complex shape.
Some of the processes employed for hole making are electrodischarge machining, laser beam machining, electron beam machining, shaped tube electro. 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. For composites with dissimilar reinforcing phase and matrix e. And, metal removal takes place due to shearing action. Conventional machining processes and machine tools module. Conventional machining an overview sciencedirect topics. Secondarymanufacturing processes provide the final shape and size with tighter control ondimension, surface characteristics etc. Hence the machining process which utilizes other machining methods are termed as unconventional. This is not true when it comes to non conventional machining processes. Click download or read online button to get modern machining processes book now. Electrically nonconducting materials cannot be processed by edm. High speed machining and assembly high speed machined aluminum parts are replacing builtup parts made by forming and assembly riveting in the aerospace industry. Note for unconventional machining process ump by jntu. Pdf selection of nonconventional machining processes using the.
On successful completion of this module, the student should understand the fundamental concepts of non conventional manufacturing technologies and the differences with the conventional processes. In unconventional machining, a form of energy is used to remove unwanted material from. An object is created by laying down successive layers of. How is classification of nontraditional machining done. Non traditional manufacturing processes an overview. Note for unconventional machining process ump by jntu heroes. Senthil kumar, ars publications the book unconventional machining processes for engineering and technology studies. When these machines are employed, they are many advantages over the traditional machining process. The processes described in this chapter are often called nontraditional machining ntm. The processes that have this common theme, controlled material removal, are today collectively known as subtractive manufacturing, in distinction from processes of controlled material addition, which are known as additive manufacturing.
Conventional machining process involved tool wearing as there is a physical contact between the tool and the work piece. Non conventional tools are more accurate and precise than the conventional tool. Non conventional process promoted longer tool life because no. This is due to material removal rate mrr decreases with increased hardness of the work material. 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. If you like this article, dont forget to share it on your social networks. Finally, some geometries are too delicate to machine while others are too complex. In conventional machining processes, there is a risk of tool wearing since physical contact is required to perform the job. Difference between conventional and non conventional machining processes are.
153 988 666 890 358 227 1047 316 136 349 514 1283 282 163 1023 484 236 1354 824 204 1305 837 1389 836 677 170 1252 293