Applications of Machining Process: The applications of machining process are as follows. 33 times. In this process, the metal removing is the same as that of the EDM process but the method of generation of heat is different. Conventional Machining Processes 2. Evaluating, Applying 4,5 9 a) Name the unconventional machining processes which are Machining is noted for which of the following characteristics relative to other manufacturing processes (two best answers): (a) creates three-dimensional geometries, (b) good dimensional accuracy, (c) net shape process, (d) poor surface finish, (e) wasteful of energy, (f) wasteful of material? View Answer, 8. Abrasive jet machining (AJM) Ultrasonic machining (USM) Chemical energy based unconventional machining . GATE-2014 The following four unconventional machining processes are available in a shop floor. No cutting forces are involved in ECM process 3. ME1001-UNCONVENTIONAL MACHINING PROCESS KINGS COLLEGE OF ENGINEERING UNCONVENTIONAL MACHINING PROCESS (ME 1001) 2 MARKS Q&A ABRASIVE JET MACHINING 1. ECM process consumes very high power 4. No use of heat, so mechanical and thermal remaining stresses are absent in the workpiece. EBM can provide holes of any shape by combining beam deflection using electromagnetic coils with high accuracy. the tool is never in contact with the job. Non-Traditional machining is recommended when we need which of the following features? Initial cost and cost of the tool is very high, frequency tool replacement is required as a tool wear takes place in this operation. The basic EDM system consists of the shaped tool (electrode) and the workpiece, connected to a DC supply and placed in a dielectric (electrically non-conducting) fluid. View Answer, 2. Application of heat is focused, so rest of the workpiece is latest affected by the heat. The tip of the tool vibrates at a frequency of 20kHz and low amplitude (0.0125mm – 0.075mm). Which of the following is correct about USM? Secondarymanufacturing processes provide the final shape and size with tighter control ondimension, surface characteristics etc. Need for the development of unconventional machining methods Unconventional 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 … Various similarities and differences between conventional machining and non-traditional machining (NTM) processes are given below in table format. These are generally made of... © Copyright 2021 TheEngineersPost.com - All Rights Reserved, Types of Unconventional Machining Process, Advantages of the unconventional machining process, Disadvantages of the unconventional machining process, Mechanical energy based unconventional machining process, Chemical energy based unconventional machining, Thermo-electric energy based unconventional machining, What is TIG & MIG Welding: Difference Between TIG and MIG welding, What is Welding? All Rights Reserved. © 2011-2020 Sanfoundry. 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. c) Metals The tool material need not be harder than the work piece material. Types of Spanners are used more than any other tool for tightening or opening different jobs. The tool is made up of brass, copper, bronze, or stainless steel. EDM process is not capable to produce sharp corners. 2 ratings. is unconventional machining process lecture notes and data analysis of energy sources such as a moulding block in passing any problem in order to the impo. [10] b) Is uncoventional machining process an alternate or complement to conventional machining process?Justify. This mock test of Unconventional Machining Process - 1 for Mechanical Engineering helps you for every Mechanical Engineering entrance exam. The spark gap normally varies from 0.005mm to 0.50mm. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. You can... Spanners and It's Types d) All of the mentioned The beam is pulsed so that the released energy results in an impulse against the work surface that does melting and evaporation. GATE-2014 The following four unconventional machining processes are available in a shop floor. c) Not efficient for brittle material The anode which is in the form of a beam attracts the electron beam and gradually gets accelerated. d) None of the mentioned b) Electron beam machining the workpiece is fixed in the tank containing the dielectric fluid. Conventional Machining Processes 2. (8) (ii) Compare and contrast the various unconventional machining process on the basis of type of energy employed, material removal rate, transfer media and economical aspects. In this type of machining process, a form of energy is used to remove unwanted material from a given workpiece. In this article, we will discuss what is unconventional machining process and its 9 Types of unconventional machining processes. Cite. Need for Unconventional Processes New materials having high strength and hardness, such as nimonic alloys and alloys with alloying elements such as tungsten, molybdenum, and columbium are difficult to machine by the traditional methods. Water jet machining process is more versatile and can be used for the metal as well as non metal. The tool has the same shape as the cavity to be machined. a) Ultrasonic machining. A valuable amount of non-productive pump down period for attaining the desired vacuum. Types, Nomenclature [Diagrams & PDF], 14 Types of Washers & How They Use? In this article, you will learn what are 14 different types of washers and how they work? 1. b) False The complex shape can be produced in the hard and brittle material. Air or gas may be nitrogen or carbon dioxide is used to mix with the abrasive particles. there has to be a relative motion between the tool and workpiece. The most appropriate one to drill a hole of square cross section of 6 mm × 6 mm and 25 mm deep is (A) Abrasive Jet Machining The following are the Types of unconventional machining processes: Mechanical energy based unconventional machining process . View Answer, 6. Presentation Summary : Solar energy is a very environment friendly power source of unconventional energy. Material removal processes are mainly thesecondary manufacturing processes.Material removal processes once again can be divided into mainly two groups and theyare “Conventional Machining Processes” and “Non-Traditional … Household appliances: refrigerators, washing machines, air conditioners, etc. a) True In NTM processes, neither shearing occurs nor chips form. Redressing of the tool is required for deep holes. A laser is an optical transducer which converts the electrical energy into coherent light. It is suitable for both conducting and non-conducting materials. 1. The Unconventional machining processes do not empty a conventional or traditional tool for metal removal; instead, they directly utilize some form of energy for metal machinery. Which of the following is a conventional process of machining? A high negative bias is applied to this grid so that the electrons generated by this cathode do not diverge and approach the next element. Unconventional Machining Processes Archives — CIVILDATAS ... civildatas Lathe Machining. Joining is the manufacturing process notes by christian heumann and hard tool materials that in your email address to subscribe this puzzle of Decrease in ratio of work hardness to tool hardness decreases material removal rate. Non – Traditional Machining (NTM) or Non – Conventional Machining (NCM), is a kind of machining technology which is different from traditional machining process and equipment. Heat affected zone in EBM is less due to shorter pulse. the tool material need to be harder than the job material. - The media of energy transfer on which the advanced machining processes are classified, are as follows; 1. [5] Explanation: Electrochemical process, chemical machining and mechanical energy process are all the types of nontraditional machining. The following four unconventional machining processes are available in a shop floor. ASSIGNMENT TOPICS WITH MATERIALS UNIT-I 1. In this machining, the metal removed from the workpiece by microchipping and erosion with fine abrasive grains in the slurry. The following four unconventional machining processes are available in a shop floor. d) None of the mentioned 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. 1. a) increase MRR. The gas supply pressure is of the order of 850kPa and jet velocity can be as high as 300 m/s and is controlled by a valve. Types of Machining Process # 4. Modern Machining UNIT 5 MODERN MACHINING METHOD Method Structure 5.1 Introduction Objectives 5.2 Working Principle of Energy 5.3 Non-conventional Machining Processes 5.4 Electrical Discharge Machining 5.5 Wire Cut Electric Discharge Machining 5.6 Ultrasonic Machining 5.7 Chemical Machining Processes 5.8 Electrochemical Machining No cutting forces are involved in ECM process 3. MRR achieved in EDM process is enough lower than the MRR in case of the conventional machining process, so it cannot be taken as an alternative to conventional machining processes at all. From the mixing chamber, the mixture is supplied to the nozzle which is the high strength of a material i.e., tungsten carbide. Traffic tools, such as cars, trains, planes, etc 3. Ultrasonic Machining can be used for which of the following processes and applications? The most common electric fluid are minerals oil such as kerosene and distilled & deionised water is used in special applications. 14. It consists of an electromechanical transducer which is connected to an AC supply. 2. He completed his engineering studies in 2014 and is currently working in a large firm as Mechanical Engineer. Need for Unconventional Processes New materials having high strength and hardness, such as nimonic alloys and alloys with alloying elements such as tungsten, molybdenum, and columbium are difficult to machine by the traditional methods. The application of heat is very focused in case of LBM as compared to EDM. a) Low cost The accurate feed rate of the tool is required. Electrolyte - Also physical contact, high velocity particles, hot gases, radiation, etc. [8] b) Draw a neat sketch of Electro Chemical Machining process scheme and explain. Chemical energy based unconventional machining, The electrochemical-based unconventional machining process, Thermo-electric energy based unconventional machining. Apart from these, photochemical, chemical milling, ultrasonic machining, laser beam machining etc. ASSIGNMENT TOPICS WITH MATERIALS UNIT-I 1. Chemical machining (CHM) The electrochemical-based unconventional machining process This process not suitable for mass production because of the high maintenance requirement. In this article, you'll learn what is cams and followers and its types, nomenclature, working, application, and more with diagrams. View Answer, 7. INTRODUCTION Abrasive Grinding Non-traditional Machining Processes Ultrasonic Machining Abrasive Water Jet Machining Chemical Machining Electro-chemical Machining Electro-chemical Grinding Electrodischarge Machining Laser Beam Machining Case Studies Overall Process comparisons . b) High cost That’s it thanks for reading. In these machining processes some other unconventional energy sources are used like laser, chemical, electron, hydraulic energy etc. The following are considered a non conventional machining process, EXCEPT... answer choices . The adequate form of the high value of MRR can be achieved as compared to other non-conventional machining processes. MCQ on Mechanical Energy Based Unconventional Machining Process. a) Increase in amplitude Sri Vidya College of Engineering & Technology, Virudhunagar Course Material (lecture notes) ME 6004 - Unconventional Machining Processes - Unit 4. He is also an author and editor at theengineerspost.com. ECM is capable of machining metals and alloys irrespective of their strength and hardness 2. Machining is a manufacturing term encompassing a broad range of technologies and techniques. Which one of the following statements is correct in respect of unconventional machining processes? (a) The cutting tool is in direct contact with the job (b) The tool material needs to be harder than the job material (c) The tool is never in contact with the job (d) There has to be a … It is especially more indispensable for machining the parts without rotational symmetry. Unconventional Machining Process (JNTU) 5. From the nozzle, the abrasive particles with velocity 150 to 300m/min are made impact the workpiece due to the high-velocity metal removed from the workpiece with no contact with the tool. Work holding and fixturing cost is very less because of the absence of mechanical cutting force. If you have any questions about any topic you can ask in the comment section. In fact, such processes don’t even utilize a so called cutting tool. Designing and making tool is difficult but its life is long recommended only for mass production. Which one of the following statements is correct in respect of unconventional machining processes? We have also a Facebook community for you guys. b) Conventional milling. In this machining, an electrolyte acts as a current carrier and high rate of electrolyte movement in the tool and workpiece gas washes the metal ions away from the workpiece before they have to change to plate onto the tool. HMP can be defined as different machining actions or phases to be used on the material being removed. In this process, the coherent or consistent light beam is focused optically for a particular period of time. Abrasive Water Jet Machining. MCQ on Mechanical Energy Based Unconventional Machining Process. 1. of ME, ACE Page 2 Non Traditional Machining (NTM) Processes are characterised as follows: • Material removal may occur with … ; 2. An unconventional (non-traditional) machining process can be defined as a material removal prpcess in which no direct contact between tool and work-piece occurs. The unconventional machining it uses some form of energy for metal removal there is no direct contact between the tool and workpiece. c) Water jet machining process University. d) No residual stress on work piece If you like our article then please share it with your friends. The following are the Types of unconventional machining processes: A high-velocity jet of dry air, nitrogen, or carbon dioxide containing abrasive particles (typically∼0.025mm) is aimed at the workpiece surface under controlled conditions. The EDM process can be used on any materials that are an electrical conductor. The traditional mechanical machining has a long history, it has played a great role in human production and material civilization. View Answer, 10. Consider the following statements in relation to the unconventional machining processes: asked Dec 25, 2017 in production by chandu ( 215k points) ies-objectives-2 Applying, Understanding 1,2 8 a) Differentiate between traditional and nontraditional machining. Save. The laser is man-made ruby crystal, containing chromium or Aluminium oxide. Electron beam machining is a thermal process used for metal removal during the machining process. 2. d) None of the mentioned c) Water jet machining process The electrolyte is a highly conductive inorganic salt solution, such as sodium chloride mixed with water or sodium nitrate. It is especially more indispensable for machining the parts without rotational symmetry. The following four unconventional machining processes are available in a shop floor. The most appropriate one to drill a hole of square cross section of 6 mm 6 mm and 25 mm deep is (a) Abrasive Jet Machining (b) Plasma Arc Machining (c) Laser Beam Machining (d) Electro Discharge Machining b) What are the industrial needs for unconventional machining processes? ECM process consumes very high power 4. To practice all areas of Manufacturing Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers. unconventional machining processes Unconventional Machining Processes (R09 December2014) Powered by Create your own unique website with customizable templates. This process uses thermal energy to remove material from metallic or nonmetallic surfaces. By conventional machining the MRR reduces with an increase in the work material hardness. 1. Cathode filaments are heated to a temperature of around 2500°C, which leads to the thermo-ionic emission of electrons, which is further increased by maintaining a very low vacuum within the chamber. 1. It is pumped at a high rate through the passage in the tool. All kinds of weapons and equipment: guns, canon, tanks, rockets, et… The machining can be performed on various components in the form of either conventional or unconventional processes. are also the type of nontraditional machines. Their superior properties have attracted several industries such as automotive, aerospace, and defence for their wide range of products. In this course, the educator Thejesh Bollineni covers Unconventional Machining Process which is a part of GATE(Mechanical). Non-Traditional Machining Dept. Need Of Unconventional Machining Process Author: projects.post-gazette.com-2020-12-28-00-45-50 Subject: Need Of Unconventional Machining Process Keywords: need,of,unconventional,machining,process Created Date: 12/28/2020 12:45:50 AM a) Electro chemical machining Cannot be used for high light reflecting materials. Download unconventional machining process 213758 PPT for free. Very small space is required to set up ECM process The most appropriate one to drill a hole of square cross section of 6 mm × 6 mm and 25 mm deep is (A) Abrasive Jet Machining Join our social networks below and stay updated with latest contests, videos, internships and jobs! Which of the following is correct about USM? One of the research of unconventional technologies is development of hybrid machining process. d) None of the mentioned Laser stands for “light amplification by stimulated emission of radiation”. By using the conventional machining the time taken for machining is more and the fewer surface finishes, as well as no accuracy. Ability to cut the heat sensitive materials. Non-Traditional Machining Process: Some of the major requirements of developing non-tradition machining processes are as follow. CLASSIFICATION OF UCM •Classification of UCM –Based on type of energy required to shape the View Answer, 5. (a) (i) Explain the factors that should be considered during the selection of an appropriate unconventional machining process for a given job. Very good accuracy and surface finish can be obtained. Recommended for some specific operations only, as production rate is very slow. The laser being coherent or consistent in nature a specific property to generate high power density. What are the three variables that are normally controlled in the machining process? casting. 2. LBM uses the light energy of a laser beam to remove material by vaporization and ablation. Good for materials that cannot withstand high temperature. 1.In abrasive jet machining, as the distance between the nozzle tip and the work surface increases, ... 11.Increasing volume concentration of abrasive in slurry (in USM process) would affect MRR in the following manner. Types of Machining Process # 4. The process is environmentally friendly as it is noiseless without any chemical reactions and heating. [8] b) Write about any four UCMP processes. Thejesh Bollineni. c) Drilling So now, we hope that we have clear all your doubts about Unconventional Machining Process. A DC power supply in the range of 5 – 25 V maintains densities, which for most of the application are 1.5 – 8A/mm² of the active machined surface. This contains 10 Multiple Choice Questions for Mechanical Engineering Unconventional Machining Process - 1 (mcq) to … For machining of plastic material which of the unconventional process can be used effectively? In the electrical beam machining, electrical energy is used to generate the electrons with high energy. There is no use of force, no direct contact between tool and workpiece. The gap between the tool and workpiece is important, thus the downward feed of the tool is controlled by the feed mechanism, which automatically maintains the constant gap. Presentation Title: Unconventional Machining Process. There is almost negligible tool wear, so the cost of tool making is an only one-time investment for mass production. 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 material-removal process. Due to the use of very high temperature at the machining zone, there are chances of deformation of the workpiece in case of these sections. b) Electron beam machining A hole shape is affected by the depth of the workpiece. Electrochemical Machining. b) WJM machining? b) List the Unconventional machining process, which uses Electro chemical energy? The present trend is the use of clear low viscosity fluids. Not for soft and ductile material due to their ductility. Machining is a processes in which a piece of raw material is cut into a desired final shape and size by a controlled material-removal process. Maintain the high degree of dimensional accuracy, so it is recommended for tool and die making. Which of the following is not a machining process? 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. Marks: 70 Question paper consists of Part-A and Part-B Answer ALL sub questions from Part-A Answer any THREE questions from Part-B ***** PART-A (22 Marks which is used to perform the work on the workpiece. Material removal rate is defined as _____. These materials are widely used in the field of the nuclear industry, space research, missile technology and in other industries which requires high strength to weight ratio, heat-resisting quality, hardness and toughness. The slurry may have to be replaced frequently. Similarities between conventional machining and NTM. This process is carried out by a automated framing machining. feed rate, depth of cut, and speed. 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. Unconventional machining process basics 1. The electrical discharge machining is also called as electro-discharge or spark erosion machining based on the erosion of metal by spark discharges. All non-conducting materials cannot be machined. and their uses with pictures. b) False Water Jet Machining (WJM) also called water jet cutting, is a non-traditional machining process in which high-velocity jet of water is used to remove materials from the surface of the workpiece.WJM can be used to cut softer materials like plastic, rubber or wood. Manufacturing processes - Mechanical Engineering (MCQ) questions and answers Home >> Category >> Mechanical Engineering (MCQ) questions and answers >> Manufacturing processes 1) Which of the following component(s) is/are manufactured by powder metallurgy processes? This process cannot be applied to the large-sized workpiece, as size for the workpiece is helpless by the size of setup. Define AJM? View Answer, 4. The complex shapes can be easily machined. At present, most of our products are manufactured and assembled by traditional methods, such as: 1. Decrease in viscosity of fluid used decreases material removal rate. with [Pictures & PDF], 12 Types of Spanners and Their Uses [with Pictures] PDF. The most appropriate one to drill a hole of square cross section of 6 mm × 6 mm and 25 mm deep is (A) Abrasive Jet Machining Which of the following is not correct about USM? It consists of a mixing chamber in which abrasive particle such as aluminium oxide, silicon carbide, diamond powder, glass particles are used. EBM provides very high drilling rates when small holes with large aspect ratio are to be drilled. In the Electron Beam Machining process, a high velocity focused beam of electrons are used to remove the metal from the workpiece. b) Process is very loud noise making The machining can be performed on a lathe machine, milling machine, ultrasonic machining… And weight savings in comparison to conventional monolithic materials trains, planes etc. The laser being coherent or consistent in nature a specific property to generate electrons. Used more than any other tool for tightening or opening different jobs supplied to nozzle! Trains, planes, etc 3 electrolyte solution properties have attracted several industries such automotive... High light reflecting materials removing excess material all areas of Manufacturing Engineering Multiple Choice Questions & Answers ( MCQs focuses... Online Study Portal-GATE, SSC JE, IIT JEE, NEET, Board... Beam is pulsed so that the released energy results in an impulse against the work on the being... Of any shape by combining beam deflection using electromagnetic coils with high energy of washers & How they use t... Or nonmetallic surfaces these, photochemical, chemical, electron, hydraulic energy etc machine, milling machine, waves. Have emerged that to cater the need of market removal there is no use clear! Some other unconventional machining process, the metal removed from the workpiece by microchipping erosion! Is recommended when we upload new posts correct about USM metal by spark discharges, slotting,,! Machining based on the workpiece a very environment friendly power source of unconventional.! Some other unconventional machining process 213758 available to View or download can machine almost material... You will learn what are the three variables that are an electrical conductor refrigerators, washing,. Operation in which the advanced machining processes - Unit 4 which of the following is unconventional machining process to conventional machining the parts without rotational.! You can ask in the work piece material that are an electrical conductor so it is suitable for mass.. You want, you can contact us or ask in the electron beam machining is also called non-traditional... Water is used in unconventional machining process and glass because of the following?! Particular period of time following features the final shape and size with control. Or granite, an abrasive material is mixed in the work material hardness uncoventional machining.... High value of MRR can be used effectively amplitude ( 0.0125mm – )... Small holes with large aspect ratio are to be harder than the work material! Given below in table format when small holes with large aspect ratio to., as well as no accuracy a Manufacturing term encompassing a broad range of products Unit! From 0.005mm to 0.50mm transfer on which the advanced machining processes research of unconventional energy machine! Only, as well as no accuracy of plastic material which of the shapes be... And techniques appliances: refrigerators, washing machines, air conditioners, etc AJM ) machining. Is more and the surface finish can be obtained ebm provides very high Drilling rates small... Shearing occurs nor chips form so called cutting tool is required uses some form of is... The anode which is connected to an AC supply most of the following four unconventional machining process #.. About any topic you can contact us or ask in the comments machining it uses some form a... “ USM – applications ” tool wear, so Mechanical and thermal stresses! Stands for “ light amplification by stimulated emission of radiation ”, neither shearing occurs nor chips.. Materials like metals or granite, an abrasive material is possible with good quality of surface finish and.! Arrangement is made up of brass, copper, bronze, or stainless.! Cater the need of market is no use of cookies on this website form of energy is used generate. Velocity focused beam of electrons are used for which of the following not. Of Merit being coherent or consistent in nature a specific property to generate electrons. Brittle materials can also be processed increase in the comments absent in the comment section of either conventional unconventional... ) Explain the Types of washers & How they work used in applications. Used decreases material removal rate is very slow work surface that does and... Of developing non-tradition machining processes are available in a shop floor it with friends! Degree of dimensional accuracy, so it is noiseless without any chemical and. Work on the erosion of metal by spark discharges processes, neither shearing occurs nor chips form ECM is of... The form of either conventional or unconventional processes ) Electrochemical machining ( ECM?! Is long recommended only for mass production because of the following statement is correct in respect unconventional... Is fixed in the electron beam machining process scheme and Explain videos, internships and!... Of work hardness to tool hardness decreases material removal rate is low and can not be than. Work surface that does melting and evaporation the voltage between 50V and 980V currents... Certificate of Merit copper, bronze, or stainless steel chips form for both conducting and materials! Slotting, trepanning, and speed nitrogen or carbon dioxide is used in unconventional,!