Abrasive jet and waterjet cutting machines selection guide. Water jet machining working principle, advantages and. 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 air gas or water and abrasive mixture. Ultrasonic machining national institute of technology. Develop mathematical model relating mrr with abrasive jet machining parameters xv. In an abrasive jet machine, material is being removed where mrr is given by.
Garnet angular shape was chosen as an abrasive material. This abrasive jet machining project is used for cutting any integrated shapes on brittle materials like glass. The high velocity stream of abrasives is generated by converting pressure energy of carrier gas or air to its kinetic energy and hence high velocity jet. Progress in the modeling of abrasive jet machining. An abrasive is small, hard particle having sharp edges and an irregular shape. The developed abrasive jet system is efficient to cut and drill brittle materials, to clean surface, to test erosion resistance of coatings, and others. It involves the use of high velocity water jet to smoothly cut a soft workpiece. The jet of abrasive particles is carried by carrier gas or air. According to nature of energy employed in machining, nontraditional machining processes are further classified into the following groups. In abrasive jet machining, abrasive particles are made to effect on work material at high velocity. Sand blasting sand blasting is a general term used to describe the act of propelling very fine bits of material at highvelocity to clean or etch a surface. Awjm is a nonconventional machining process where material is removed by impact erosion of high pressure high velocity of water and entrained high velocity of grit abrasives on a work piece 5. The high speed stream of abrasives is ed by converting the pressure energy of carrier gas produc or air to its. The high velocity abrasive particles impact on the kerf face and do the actual cutting.
Nocnon traditional abrasive machining processes ultrasonic, abrasive jet abrasive water jet machining nocoperations management nocphase equilibria in materials nature and properties of materialsii. 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. Design and fabrication of abrasive jet machine semantic scholar. The machining medium is solid grains suspended in an abrasive slurry in the former,while a fluid is employed in the wjm process. The process makes use of an abrasive jet with high velocity, to remove material and provide smooth surface finish on hard work pieces. In order to cut harder materials like metals or granite, an abrasive material is mixed in the water. Mechanical processes like ultrasonic machining, abrasive jet machining, water jet machining, abrasive water jet machining, etc. In abrasive jet machining, a high velocity jet of abrasives is made to strike the work surface for removal of material by impact erosion. 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. They may use pressurized water or compressed air as the driving fluid to propel the abrasive particles. Waterjet weaving machines are not used as frequently as air jets, but they are preferred for some types of fabrics. Abrasive water jet machiningwjm mohit ostwal assistant professor department of mechanical engineering jodhpur institute of engineering and technology, coed, jodhpur 2122016 mohitostwal,asst. Mar 29, 2017 abrasive jet machining is a nontraditional machining process which is mostly used in machining of hardened metals.
Studies on recharging of abrasives in abrasive water jet. The versatility of the abrasive water jet in cutting almost any engineering material is a very special feature of this technology. This classification imposes some limitations, because most materials are neither absolutely ductile nor absolutely brittle, but lay within the continuous spectrum between those two idealizations. Sapphire was chosen as primary nozzle water jet and tungsten carbide was selected as secondary nozzle water abrasive jet. Effect of process parameter in abrasive water jet cutting. Waterjet machining is an innovative cutting method, and one of the fastestgrowing processes for machining today, thanks to its ease of use and versatility. The highvelocity stream of abrasives is generated by converting pressure. Abrasive cutting aluminium for more information, please visit. It is found that the aspect ratio increases with an increase in air pressure. Abrasive jet machining ajm is a nontraditional machining process that can machine material without generating heat and. A jet of abrasive particle is passed by carrier gas or air. Nptel provides elearning through online web and video courses various streams.
In case, the stream of a fine grained abrasive mixed with air or some other. 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. During this process, its kinetic energy is converted to pressure energy. Similar case happens when ice particles are introduced as in ice jet machining. The right abrasive delivery system can increase efficiency. Wjm can be used to cut softer materials like plastic, rubber or wood. It consists of a mixing chamber, gas filter, pressure gauge, regulator, and the nozzle. The stream exits the nozzle as a three phase mixture of air, water and abrasive particles with a cutting diameter of 0. Abrasive cutter was employed for machining the composites.
Since the process is non thermal, nonchemical and nonelectrical it creates no. A focused stream of abrasive particles, carried by high pressure air or gas is made to impinge on the work surface through a control nozzle. The depth of penetration of the jet erosion in a standard period of time is used to determine equivalent wheel hardness. 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. A compressor is used which is connected through pu pipe to control valve. Study on erosion wear of steels under varying abrasive jet. Specifically it is used to cut intricate shapes or form specific edge. Non traditional abrasive machining processes ultrasonic, abrasive jet and abrasive water jet machining video. A highvelocity jet of dry air, nitrogen, or carbon dioxide containing abrasive particles is aimed at the workpiece surface. Typical abrasive jet nozzle the typical orifice diameter for an abrasive jet nozzle is 0. 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.
A jet of abrasive particles is carried by carrier gas or air. Abrasive jet machining process, parameters, equipment, mrr. Abrasive jet machining pptpdfseminar faadooengineers. The process makes use of an abrasive jet with high velocity, to remove material and provide smooth surface finish to hard metallic workpieces. 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. The figure shown is the above abrasive jet machining. Nocnon traditional abrasive machining processes ultrasonic, abrasive jet abrasive water jet machining nocoperations management nocphase equilibria in materials. Abrasive jet machining ajm utilizes a high velocity jet of abrasives to remove material from work surface by impact erosion. A study of effect of various process parameters on.
Abrasive flow machining afm hacettepe universitesi. Ultrasonic machining is a mechanical type nontraditional machining process. Waterjet weaving machines were first developed in czechoslovakia in the 1950s and subsequently refined by the japanese in the1960s. Abrasive jet machining ajm, also known as abrasive microblasting, pencil blasting and microabrasive blasting, is an abrasive blasting machining process that uses abrasives propelled by a high velocity gas to erode material from the workpiece. In this process, a highspeed wellconcentrated water jet is used to cut the metal.
Sand used to be the most commonly used material, but since the lung disease silicosis is. 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. We can cut any difficult shapes and create holes in glass and brittle material using compressed air and abrasive particles. In abrasive jet machining, a focused stream of abrasive particles, carried by high pressure air or gas is made to impinge on the work surface through a nozzle.
Wit solapur professional learning community 1,073 views. Momentum of the water stream accelerates and entrains abrasive as it passes through the nozzle. Ultrasonic machining is a nontraditional 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. This process is favorable for removing various deposits and coatings on metallic and ceramic surfaces. Abrasive water jet machining is a nontraditional method of evacuation of material by effect disintegration of the pressurised high speed of water and entrained high speed of coarseness abrasives on a work piece. Whats the difference between sand blasting and abrasive jet. 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. Water jet and abrasive water jet machining youtube. In order to cut harder materials like metals or granite, an abrasive material is. Abrasive jet and waterjet cutting machines are used to cut sheet materials or to remove materials from a surface by generating a focused stream of fluid mixed with abrasive particles. In water jet machining, high velocity water jet is allowed to strike a given workpiece. Introduction and abrasive jet machining, nonconventional machining, nptel note, module 9, lesson 35, version 2 me, iit kharagkpur, accessed on 12. Abrasive water jet machining injection type ip23622, ms system woma, austria power 22 kw, 50 hz maximum discharge pressure 360 mpa abrasive feeding system vibratory conveyor with heating facility cnc work table twoaxis control x, y british standard sieves, mesh 30, 36, 44, 52, 60, 72, 80, 100, number 120.
Analysis and modeling of micro abrasive air jet cutting. It is the material removal process where the material is removed by high velocity stream of airgas or water and abrasive mixture. Abrasive jet machining basic terms and working duration. Since the aspect ratio is a major interest characteristics of kerf in micro cutting, an experimental investigation is carried out to study the effect of cutting process parameters on the aspect ratio in this study. In abrasive jet machining, a focused stream of abrasive particles, carried by high pressure air or gas is made to impinge on the work surface through a nozzle and the work material is made to impinge on the work surface through a nozzle and work material is removed by erosion by high velocity abrasive particles. In order to meet these challenges, a number of newer material. Abrasivejet machining ajm modern machining process. While most professionals in the manufacturing industry. Get an overview of ajm process, mechanism, parameters, equipment, mrr, accuracy, capability, pros and cons, applications, controlling, etc. A study of effect of various process parameters on abrasive.
High velocity jet is aimed at a surface under controller condition. The accustream abrasive pots are a cost effective solution for adding waterjet cutting capacity and replacing existing waterjet cutting machines. The introduction of abrasives to the fluid jet enhances the machining efficiency and is known as abrasive water jet machining. Micro abrasive air jet machining technology is being increasingly used in the fields of micro cutting. In abrasive water jet machining awjm, abrasive particles are to prepared invade on the work material at elevated speed. Matsumura19, examined the stagnation effect during abrasive water jet machining of glass.
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 system and its various applications in. Non traditional abrasive machining processes ultrasonic, abrasive jet and abrasive water jet machining. The variables that influence the rate of metal removal and accuracy of machining in this process is.
However as the high velocity water jet is discharged from the orifice, the jet tends to entrain atmospheric air and flares out decreasing its cutting ability. 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. 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. Ajm deburring has the advantage over manual deburring method that generates. Abrasive jet machining ajm is the process of material removal from a work piece by the. Kanzaki, material response to particle impact during abrasive jet machining of alumina ceramics, j mat proc tech, 2003, 2, p. Common uses include cutting heatsensitive, brittle, thin, or hard materials. A abrasive second pot can be added to avoid long downtimes between. Otherwise the quality of the abrasive jet will be diffused, the quality of the cuts it produces will be poor, and the life of the mixing tube will be short. Abrasive flow machining afm semih sancar 20622852 selcuk unal 20622976 yunus kocabozdogan 20519809. Abrasive water jet cutting of material involves the effect of a high pressure velocity jet of water with induced abrasive particle on to. 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. Abrasive jet system and its various applications in abrasive.
Abrasive water jet cutting is an extended version of water jet cutting. This work reports recent progress in the modeling of erosion processes for. Most existing models for abrasive jet machining ajm are based on erosion models for either ductile or brittle materials. It is the material removal process where the material is removed by high velocity stream of air gas or water and abrasive mixture. Abrasive jet machining machining abrasive free 30day. Principle of water jet machinethis process works on the basic principle of water erosion. It uses the kinetic energy of water particle to erode metal at the contact surface. June 16, 2016 mainpath news comments off on waterjets. The high velocity stream of abrasives is generated by converting pressure energy of carrier gas or air to its. Abrasive jet machining ajm is a nonconventional machining process where a high pressure air stream with small abrasive particles to impinge the work surface through a nozzle.
637 650 910 1105 748 583 476 1133 1253 222 1022 597 611 763 1366 231 1035 336 1021 1280 863 137 169 442 1123 780 1535 1454 131 1302 866 1295 1337 615 1394 1414 700 184 1275 508 1098 1399 1280