The use of abrasives to shape parts is probably the oldest material removal process. In water jet machining, high velocity water jet is allowed to strike a given workpiece. Fabrication of optimal abrasive water jet machining using. Water jet machining wjm is a mechanical energy based nontraditional machining process used to cut and machine soft and nonmetallic materials it involves the use of high velocity water jet to smoothly cut a soft workpiece. Jun 29, 2017 cutting of hard materials have been overcome by introducing abrasives in water in wjm also called abrasive water jet machining awjm. Introduction and abrasive jet machining notes, mechanical engineeirng, semester notes edurev is made by best teachers of. It also includes micronanofinishing processes viz, abrasive flow finishing, magnetic abrasive finishing, etc. High velocity impact of an abrasive particle causes a tiny brittle fracture on the work surface and the flowing gases carries away the dislodged small workpiece particle. The process makes use of an abrasive jet with high velocity, to remove material and provide smooth surface finish to hard metallic workpieces. Lecture 14 abrasive jet machining ajm lecture 15 abrasive water jet machining awjm lecture 16 ultrasonic machining usm lecture 17 edm, wireedm, edg, eddg, awedg lecture 18 elastic emission machining lecture 19 pmedm and ecd and elid, ech lecture 20 abrasive flow finishing. How an abrasive jet machining works engineers academy. Abrasive jet machining engineering360 engineering search.
Abrasive water jet machining awjm, an important nonconventionaltype machining, is capable to overcome the limitations as regards to the machining of composites and therefore widely employed to. It uses the kinetic energy of water particle to erode metal at the contact surface. It is similar to abrasive jet machining ajm in water jet machining, high velocity water jet is allowed to strike a given workpiece. Abrasive jet machining free download as powerpoint presentation. Lbm is one of the amps which is used for shaping almost whole range of engineering materials. In this process, a highspeed wellconcentrated water jet is used to cut the metal.
Introduction plasmaarc machining pam employs a highvelocity jet of hightemperature gas to melt and displace material in its path. Plasma arc machining process, diagram, advantages and. The torch produces a highvelocity jet of hightemperature ionized gas called plasma that cuts by melting and. In order to meet these challenges, a number of newer material. Abrasive jet machining ajm, also known as abrasive blasting, is a mechanical energy based non traditional machining process used to remove unwanted material from a given work piece. Abrasive jet machining ppt pdf seminar seminar on abrasive waterjet machiningnonpollution machining machining of eccentric sheave on cnc complete project report ebook free download doc. Abrasive water jet cutting is an extended version of water jet cutting. Abrasive jet machining ajm by nishtha chouksey 0201ip121045 introduction abrasive jet machining is the material removal process where the material is removed by high velocity stream of airgas or water and abrasive mixture. Abrasive jet machining working, advantages, disadvantages. Mechanical processes like ultrasonic machining, abrasive jet machining, water jet machining, abrasive water jet machining, etc. Paul,department of mechanical engineering, iit kharagpur. We even have lectures for advanced rocket propulsion which will have to do with a great deal of different complex calculations. Mechanical engineering 155 courses linuxpert systems. Abrasive jet machining research abrasive jet, abrasive waterjet, and abrasive slurry jet micro machining are nontraditional microfabrication technologies that utilize high speed jets of microscopic particles to mechanically etch a wide variety of materials without generating heat or otherwise affecting material properties.
Non traditional abrasive machining processes ultrasonic, abrasive jet abrasive water jet machining. High velocity jet is aimed at a surface under controller condition. Shantanu bhattacharya, department of mechanical engineering, iit. In his work wet abrasive jet machining with a robot guided system allows to prepare local tool areas and to realize a specific design of the cutting edge, as well as advantageous surface qualities. Abrasive jet and waterjet cutting machines are available as complete systems with all of the components required for the blasting or jet machining applications such as pressure generation intensification, cabinets, nozzles or wheels, and dust collectors. Abrasive flow machining afm, also known as abrasive flow deburring or extrude honing, is an interior surface finishing process characterized by flowing an.
The abrasive jet inclination angle of erosion rate was measured. In abrasivejet machining ajm material is removed by the impact of a high velocity stream of gases and abrasive mixture focused on to the workpiece. In this machining process a focus stream of abrasive particles are forces to impinge on work piece at high velocity. Abrasive jet machining ajm utilizes a high velocity jet of abrasives to remove material from work surface by impact erosion. May 20, 2017 water jet machining wjm also called water jet cutting, is a nontraditional machining process in which highvelocity jet of water is used to remove materials from the surface of the workpiece. The process makes use of an abrasive jet with high velocity, to remove material and provide smooth surface finish on hard work pieces. Ajm is considered as a mechanical energy based nontraditional machining process that utilizes a jet of gasabrasive mixture for removing material.
These high velocity abrasive particles remove metal by brittle fracture or erosion from work piece. In order to cut harder materials like metals or granite, an abrasive material is. A study of effect of various process parameters on. Part 2 deals with thermal machining processes for example, electric discharge machining, laser beam machining, electron beam machining, etc. Sep 11, 2015 abrasive jet machining effect of exit gas velocity and abrasive particle density. Called pam, this is a method of cutting metal with a plasmaarc, or tungsten inertgasarc, torch. An overview of abrasive waterjet machining awjm the following limitations are relevant to abrasive waterjet machining 1,5. Ultrasonic machining, water jet machining, abrasive water jet machining.
Nptel video lecture topics for mechanical engineering new no. Lecture 37 water jet machining and abrasive water jet youtube. Cutting of hard materials have been overcome by introducing abrasives in water in wjm also called abrasive water jet machining awjm. Abrasive jet machining machining abrasive free 30day. It consists of a mixing chamber, gas filter, pressure gauge, regulator, and the nozzle. One of the strategic areas where robotic awjm is finding critical application is dismantling of nuclear plants. In this video we have explained working of arasive jet machining process, we have seen the working principle, equipments used.
Gotawala 1pg student, 2associate professor, 3assistant professor 1mechanical department. The filtered gas at a pressure of 2 to 8 kgfcm 2 is supplied to the mixing chamber containing the abrasive powder and. Abrasive jet system and its various applications in abrasive. Mar 29, 2017 abrasive jet machining is a nontraditional machining process which is mostly used in machining of hardened metals. Common uses include cutting heatsensitive, brittle, thin, or hard materials.
The ajm process differs from conventional sand blasting in that the abrasive is much finer and the process parameters and cutting action are carefully controlled. The accustream abrasive pots are a cost effective solution for adding waterjet cutting capacity and replacing existing waterjet cutting machines. All aspects of mechanical, electrochemical and thermal processes are comprehensively covered. Principle of water jet machinethis process works on the basic principle of water erosion.
It is the material removal process where the material is removed by high velocity stream of airgas or water and abrasive mixture. Almost any type of material ranging from hard brittle materials such as ceramics, metals and glass. Abrasive jet machining is a nontraditional machining process which is mostly used in machining of hardened metals. Mechanical engineering online courses with video lectures. Non traditional abrasive machining processes ultrasonic, abrasive jet and abrasive water jet machining. The versatility of the abrasive water jet in cutting almost any engineering material is a very special feature of this technology. Advanced machining processes video course course outline there is a need for machine tools and processes which can accurately and easily machine the most difficulttomachine materials and workpieces with intricate and accurate shapes. This document is highly rated by students and has been viewed 450 times.
Water jet and abrasive water jet machining youtube. Abrasive jet machining process, parameters, equipment, mrr. A abrasive second pot can be added to avoid long downtimes between. Abrasive processes grinding super finishing processes production of screw threads gear manufacturing jigs and fixtures for machine shops design and applications of jigs and fixtures non traditional manufacturing ultrasonic machining water jet machining and abrasive water jet electro chemical machining electro discharge machining ebm and lbm. They are important because introduction they can be used on all types of materials ranging from soft metals to hardened steels and hard nonmetallic materials such as. Apr 17, 2020 a method to radius difficult to reach. In order to cut harder materials like metals or granite, an abrasive material is mixed in the water. The process is associated with the process is associated with erosion, in which the surface profiles changes with deformation, fracture and material removal at collision of the particles.
Matsumura19, examined the stagnation effect during abrasive water jet machining of glass. Introduction to abrasive machining and finishing processes grinding process grinding. Lecture 10 introduction to abrasive jet machining process. The variables that influence the rate of metal removal and accuracy of machining in this process is.
Water jet machining wjm also called water jet cutting, is a nontraditional machining process in which highvelocity jet of water is used to remove materials from the surface of the workpiece. Abrasive jet machining working, advantages, disadvantages and applications construction in abrasive jet machining, the gases employed are usually air and nitrogen. Abrasive jet machining ajm is non conventional machining the removal of material from a workpiece by the application of a high speed stream of abrasive particles carried in gas medium from a nozzle. Abrasive machining involves material removal by the action of hard, abrasive particles. Get an overview of ajm process, mechanism, parameters, equipment, mrr, accuracy, capability, pros and cons, applications, controlling, etc. Abrasive jet system and its various applications in. Machining awjm through the ieg in amperes, t is time of current flow or ecm, e.
His work concentrates on the requirements and challenges in preparing and designing the cutting edge micro shape using wet abrasive jet machining. Apr 06, 2016 in abrasive jet machining ajm material is removed by the impact of a high velocity stream of gases and abrasive mixture focused on to the workpiece. We have a separate course for mathematics model in engineering and science. Abrasives used are aluminium oxide, silicon carbide, glass powder and sodium carbonate. Jun 07, 2018 hello everyone welcome to engineers academy topics covered. Singh, balbir singh modern machining processes presents unconventional machining methods which are gradually commercial acceptance. Abrasive jet machining ajm, also known as abrasive microblasting, pencil blasting and micro abrasive blasting, is an abrasive blasting machining process that uses abrasives propelled by a high velocity gas to erode material from the workpiece. Abrasivejet machining ajm modern machining process. Abrasive jet machining effect of mixing ratio on material removal ratemrr. The figure shown is the above abrasive jet machining.
Specifically it is used to cut intricate shapes or form specific edge. Increased mass flow rate of abrasive will result in a decreased velocity of fluid and there by decreases the available energy for erosion and ultimately the mrr. During this process, its kinetic energy is converted to pressure energy. Search by nptel course id, course name, lecture title, coordinator. Abrasive jet machining ajm, also known as microabrasive blasting, is a mechanical energy based unconventional machining process used to remove unwanted material from a given workpiece the process makes use of an abrasive jet with high velocity, to remove material and provide smooth surface finish to hard metallic workpieces. Abrasive jet machining ajm, also known as micro abrasive blasting, is a mechanical energy based unconventional machining process used to remove unwanted material from a given workpiece. Those who are interested to know more about welding engineering and the way it functions can learn about the same with our tutorials.
Hello everyone welcome to engineers academy topics covered. The right abrasive delivery system can increase efficiency. Ijedr1602152 international journal of engineering development and research. The developed abrasive jet system is efficient to cut and drill brittle materials, to clean surface, to test erosion resistance of coatings, and others. Usm, and jet machining processes abrasive jet machining, water jet machining, abrasive water jet machining, but these processes have their own limitations regarding workpiece material, shapes, etc. Abrasive jet machining effect of exit gas velocity and abrasive particle density. A study of effect of various process parameters on abrasive. In abrasive waterjet micromachining awjm, high pressure 100400 mpa water is pumped through a small orifice, and mixed with 30200.
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