Classification of non-traditional machining is based on following factors The application of heat is very focused in case of LBM as compared to EDM. How it works? Modification of this process are used for turning, slotting, trepanning, and profiling operation in which the electrode becomes the cutting tool. It is suitable for both conducting and non-conducting materials. The unconventional machining use for the machine the hard and brittle materials such as carbides, stainless steel, Hastelloy, nitralloy, waspalloy, and any other that cannot be machined by a conventional process using the conventional machines such as lathe , milling , shaper , planer etc. Nontraditional 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. In this process, high velocity water jet strikes at working surface and metal removed due to erosion by water particle. the workpiece is fixed in the tank containing the dielectric fluid. 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. Non-Traditional machining can also be called as _____ a) Contact Machining b) Non-contact machining c) Partial contact machining d) Half contact machining View Answer. The laser being coherent or consistent in nature a specific property to generate high power density. The slurry may have to be replaced frequently. The LDM setup consists of a laser tube, a pair of reflectors, one at each end of the tube, a flash tube or lamp, an amplification source, a power supply unit and a cooling system. non - traditional machining can also be called as : answer : option c : non - contact machining explanati view the full answer Workpiece after machining is free any stress. So, fragile and brittle materials can also be processed. The unconventional machining is also called as non-traditional machining. Recommended for some specific operations only, as production rate is very slow. 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. The complex shapes can be easily machined. Non-Traditional machining can also be called as? For example, abrasive water jet operations use mechanical energy, but material is removed by erosion. It is mostly used to machining soft materials. Basic principles: Laser machiningis to use the energy of light to reach high energy density at the focal point after being focused by the lens, to melt or vaporize the material and remove it in a very short time to realize the machining. The anode which is in the form of a beam attracts the electron beam and gradually gets accelerated. Redressing of the tool is required for deep holes. Ability to cut the heat sensitive materials. Unconventional or nontraditional machining processes are used when one or more of the following occur: ... Electrical-Discharge Machining (EDM) is also called. The tool and workpiece should be chemically still with the electrolyte solution. Mechanical Machining I Jet Machining and Ultrasonic Machining (USM) are typical examples of single action, mechanical non traditional machining processes. By using the conventional machining the time taken for machining is more and the fewer surface finishes, as well as no accuracy. 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. It has the ability to cut hard materials such as composites, ceramics, and glass. A machining process is called non-traditional if its material removal mechanism is basically different than those in the traditional processes, i.e. The present trend is the use of clear low viscosity fluids. Several types of non-traditional machining processes have developed to better machining condition. Heat affected zone in EBM is less due to shorter pulse. If you like our article then please share it with your friends. Conventional machining can be defined as a process using mechanical (motion) energy. The complex shape can be produced in the hard and brittle material. Non-conventional machining utilises other forms of energy. which were presented in this article in a detailed way. 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. 14 Types of Washers & How They Use? EBM provides very high drilling rates when small holes with large aspect ratio are to be drilled. In this article, we will discuss what is unconventional machining process and its 9 Types of unconventional machining processes. Industry professionals and materials engineers will also find Nontraditional Machining Processes to be a source of ideas and processes for development and industrial application. 4 0 obj This process not suitable for mass production because of the high maintenance requirement. Universiti Malaysia Perlis. It is the reverse of electroplating. Cannot be used for high light reflecting materials. Saif M. is a Mechanical Engineer by profession. Initial cost and cost of the tool is very high, frequency tool replacement is required as a tool wear takes place in this operation. electrodischarge or spark-erosion machining. Non-conventional machining processes may use chemical or thermal means of removing material. Save my name, email, and website in this browser for the next time I comment. It can machine almost any material irrespective of their mechanical properties. 7th May, 2014. The most common material removal processes, sometimes referred to as conventional or traditional machining, are those that mechanically cut away small chips of material using a sharp tool. Machining is a part of the manufacture of many metal products, but it can also be used on materials such as wood, plastic, ceramic, and composites. 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. It consists of an electromechanical transducer which is connected to an AC supply. The accurate feed rate of the tool is required. The so-called non-conventional machining techniques can no longer be called 'non traditional', si nce they have wide range of applications. He completed his engineering studies in 2014 and is currently working in a large firm as Mechanical Engineer. Also the selection process becomes more important as all the machining processes cannot be done by using a single method we need to choose an efficient method for different machining processes. When the metal is removed by erosion caused by rapidly recurring spark discharges between the … 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. Abrasive Water Jet Machining Electro Discharge Machining Laser Beam Machining Nontraditional Machining Ultrasonic Machining .  Very hard fragile materials difficult to clamp for traditional machining  When the workpiece is too flexible or slender  When the shape of the part is too complex He is also an author and editor at theengineerspost.com. The electrical discharge machining is also called as electro-discharge or spark erosion machining based on the erosion of metal by spark discharges. The non-conventional machining process also called as the non-traditional machining process works on energies like mechanical, electrical, thermal, chemical, electrochemical and more. Due to above reason, EDM replacing conventional machining. Laser stands for “light amplification by stimulated emission of radiation”. The spark gap normally varies from 0.005mm to 0.50mm. The tool has the same shape as the cavity to be machined. <>/ExtGState<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S>> It consists of a mixing chamber in which abrasive particle such as aluminium oxide, silicon carbide, diamond powder, glass particles are used. [1] The mechanical process is based on the machining done using the high velocity of particle to strike the work piece for the machining. It is different from traditional processing methods that use tools, abrasives, etc. The electrolyte is a highly conductive inorganic salt solution, such as sodium chloride mixed with water or sodium nitrate. WJM can be used to cut softer materials like plastic, rubber or wood. No use of heat, so mechanical and thermal remaining stresses are absent in the workpiece. Electro Chemical Grinding (ECG) Electro chemical grinding is also called electrolytic grinding. The EDM process can be used on any materials that are an electrical conductor. Fine holes can be drilled easily and accurately. non traditional machining 1. PLAY. The equipment has a There is no use of force, no direct contact between tool and workpiece. The unconventional machining it uses some form of energy for metal removal there is no direct contact between the tool and workpiece. A person who specializes in machining is called a machinist.A room, building, or company where machining is done is called a machine shop.Much of modern-day machining is carried out by computer numerical control (CNC), in which computers are … LBM uses the light energy of a laser beam to remove material by vaporization and ablation. 3. Machining of hard and brittle material is possible with good quality of surface finish and accuracy. <> Cite. Water jet machining is an environment friendly, non-traditional machining process. 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 … • Ultrasonic Machining (USM) and Waterjet Machining (WJM) are typical examples of single action, mechanical non traditional machining processes. Also, machining can be performed on any existing part, like forging or casting. Highly critical sections and weak materials can also be processed without any risk of their deformation because in this process applies direct pressure on the workpiece. In this process, the coherent or consistent light beam is focused optically for a particular period of time. Designing and making tool is difficult but its life is long recommended only for mass production. 2. So now, we hope that we have clear all your doubts about Unconventional Machining Process. The electron beam machining arrangement is made as shown in the figure. Non-Traditional Machining. Work holding and fixturing cost is very less because of the absence of mechanical cutting force. The tool is made up of brass, copper, bronze, or stainless steel. When these machines are employed, they are many advantages over the traditional machining process. Bhuvenesh Rajamony. A) Automobile B) Aerospace C) Medical D) All of the mentioned Answer: D. 4. This site uses Akismet to reduce spam. In fact, such processes don’t even utilize a so called cutting tool. That’s it thanks for reading. 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. In which of the following industries, Non-traditional machining methods play an important role? óéãíÍçà1œ¥jÃÿ²ùßoo>À©?ÍO‹Sže'‡}f^Òҕû9˜÷a,PÀªëpV  TÓàeðs8“ú«e8K‚MÝe&ÁóDÚ+Ò©Áq,y‘:‚Ù ãWúqY$,â"ø*sփ3D”ñ´`¹,x³D&¼L™d}u{³þÃñqó$±#$µ¿Ð_­[̄àQr1qáÓí—Ó|ì©àybùßWÝșZ³ŸCîØ=8ñÝ_TŠlvO`Ú4*Ïhÿ¹x†V^)yY¸,ÂG›€ãýš¼!NYÂó(ñÆ)“0%ˆ•,Rdžÿñ øÑãXF. EDM refers to a non-traditional machining method, which removes a workpiece with the use of thermal energy. Notify me of follow-up comments by email. EDM process is not capable to produce sharp corners. <> Maintain the high degree of dimensional accuracy, so it is recommended for tool and die making. This process cannot be applied to the large-sized workpiece, as size for the workpiece is helpless by the size of setup. The process is environmentally friendly as it is noiseless without any chemical reactions and heating. A hole shape is affected by the depth of the workpiece. 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. The adequate form of the high value of MRR can be achieved as compared to other non-conventional machining processes. Nontraditional machining can be thought of as operations that do not use shear as their primary source of energy. Keywords. Subsequently many non-traditional machining (NTM) or unconventional machining processes have emerged that to cater the need of market. 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. From the mixing chamber, the mixture is supplied to the nozzle which is the high strength of a material i.e., tungsten carbide. 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? 3 0 obj • Very hard fragile materials difficult to clamp for traditional machining Not for soft and ductile material due to their ductility. If you want, you can join our community, here is the link to our Facebook group. 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 used for traditional manufacturing processes. Air or gas may be nitrogen or carbon dioxide is used to mix with the abrasive particles. Basic principle: Laser machining technology has the advantages of less waste o… 90% of metal is removed by electro chemical action and 10% of metal is removed by the abrasive action of the grinding wheel. stream his process is also uneconomical, time-consuming and sometimes impossible to machine complex shapes. You have entered an incorrect email address! ... includes torch cutting, electrical discharge machining or EDM, and high-energy beam machining. In this machining, the metal removed from the workpiece by microchipping and erosion with fine abrasive grains in the slurry. Electrically non-conducting materials cannot be processed by EDM. The unconventional machining use for the machine the hard and brittle materials such as carbides, stainless steel, Hastelloy, nitralloy, waspalloy, and any other that cannot be machined by a conventional process using the conventional machines such as lathe, milling, shaper, planer etc. [Short and Complete Guide], Heat Treatment Processes: Types, Methods, Procedure, Applications (PDF), What is Shaper Machine and The 4 Major Types of Shaper Machines, Cams and Followers: How they Work? 2 0 obj Application of heat is focused, so rest of the workpiece is latest affected by the heat. %µµµµ endobj Non-traditional machining is also called advance manufacturing process. The most common electric fluid are minerals oil such as kerosene and distilled & deionised water is used in special applications. If you have still any doubts about the “Types of Unconventional Machining Process” you can contact us or ask in the comments. This whole setup is fitted inside an enclosure, which carries good quality reflecting surface inside. 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. In this process the voltage between 50V and 980V and currents from 0.1A to 500A. In NTM processes, neither shearing occurs nor chips form. Chemical energy based unconventional machining, The electrochemical-based unconventional machining process, Thermo-electric energy based unconventional machining. A valuable amount of non-productive pump down period for attaining the desired vacuum. • The machining medium is solid grains suspended in an abrasive slurry in the former,while a fluid is employed in the WJM process. Good for materials that cannot withstand high temperature. Non-Traditional Machining method is an … 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. The tip of the tool vibrates at a frequency of 20kHz and low amplitude (0.0125mm – 0.075mm). An abrasive gun is used to supply an abrasive slurry, which is a mixture of abrasive grains and the water in between tool and workpiece interface under a pressure. • Very hard fragile materials difficult to clamp for traditional machining It is pumped at a high rate through the passage in the tool. 3. When the potential difference between the tool and workpiece is high, spark discharges through the fluid, removing a very small amount of metal from the work surface. Extremely hard and brittle materials can be easily machined. <> 1 0 obj The beam is pulsed so that the released energy results in an impulse against the work surface that does melting and evaporation. endobj Subscribe to our newsletter to get notified when we upload new posts. The cathode is made of tungsten or tantalum. Special processing is a new process developed in recent decades. Learn how your comment data is processed. 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. All non-conducting materials cannot be machined. Very good accuracy and surface finish can be obtained. Further since the machining unit (minimum controllable amount of material that can be removed) in EEM is 0.01 µm or less, it can be called atomic unit material processing. The laser is man-made ruby crystal, containing chromium or Aluminium oxide. to directly remove excess material using mechanical energy. (A) Contact Machining (B) Non-contact machining (C) Partial contact machining (D) Half contact machining Answer B. MCQ No - 4. In this process, a high velocity water jet is used to machining work piece. xœY[sÛº~÷ŒÿɎ…¯Ng|’4u§Çé9Gmrú K”Å E0$%§ÿ¾»@(Ár2IIÜÅÞ¾½A?ÍooþøWÁJ^fl¾¾½,‚?‚‰¨àQÌò$㠛oêão9{no"öLŸ Among them conventional machining processes are age old and at the same time reliable; however, various abrasive cutting processes and so-called non-traditional machining (NTM) processes can also provide similar facility. Special processing refers to those processing methods that are not in the traditional processing technology category. The Non-Traditional Machining methods include, Ultrasonic Machining, Laser Beam Machining, Water Jet Machining, Abrasive Water Jet Machining, Electron Beam Machining, etc. but this is also called non traditional machining. The velocity transformer which holds the tool firmly. The high cost of the equipment and necessary regular maintenance applicable to any equipment using the vacuum system. a different form of energy (other than the excessive forces exercised by a tool, which is in physical with [Pictures &... 12 Types of Spanners and Their Uses [with Pictures] PDF. EBM can provide holes of any shape by combining beam deflection using electromagnetic coils with high accuracy. 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. 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. Just after the cathode, there is a grid. Materials which cannot be machined by conventional methods are machined by LBM. endobj I The machining medium is solid grains suspended in an abrasive slurry in the former, while a uid is employed in the Jet machining process. 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. There is almost negligible tool wear, so the cost of tool making is an only one-time investment for mass production. A laser is an optical transducer which converts the electrical energy into coherent light. If you have any questions about any topic you can ask in the comment section. As particle impact the work surface, they cause small cracks, and the gas stream carries both the abrasive particles and the fractured (wear) particles away. 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. Non-Traditional Machining Method is an advanced method used to overcome the problems of Traditional Machining methods. Metal is removed from the surface of the work piece by electro chemical action and also by abrasive action of a grinding wheel. Costlier for machining very hard material. Therefore by using unconventional machining the time taken is less and the surface finish and accuracy are excellent. In ultrasonic machining, ultrasonic waves are produced by means of magnetostrictive effects which is converted into mechanical vibration. Answer: b Explanation: Tool and work piece are at a distance apart in this type of machining. 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. %PDF-1.5 In this, the metal removal rate is low and cannot be used for large machining cavities. which is used to perform the work on the workpiece. Non-Traditional machining can also be called as _____ A) Contact Machining B) Non-contact machining C) Partial contact machining D) Half contact machining Answer: B. We have also a Facebook community for you guys. Types, Nomenclature [Diagrams & PDF]. The unconventional machining is also called as non-traditional machining. So the newer machining processes developed are often called"Non Traditional machining process " or "Unconventional machining process".In this employs some form of energy like mechanical chemical thermal electro chemical etc.for cutting the material. such as turning, drilling, shaping and milling. In this process, the metal removing is the same as that of the EDM process but the method of generation of heat is different. 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. Depth of Cut - measured along workpiece normal Step over Distance - (also called radial depth of cut)- Measured in tangent plane of workpiece and perpendicular to cutter travel or workpiece feed s is step over distance d is … STUDY.