Water jet cutting a technology on the rise october 2010 page 5 fig. It is one of the most famous nontraditional machining process because it is environment friendly. It is similar to abrasive jet machining ajm in water jet machining, high velocity water jet is allowed to strike a given workpiece. Water jet and abrasive water jet machining youtube.
The filtered gas at a pressure of 2 to 8 kgfcm 2 is supplied to the mixing chamber containing the abrasive powder and. Abrasive water jet machine awjm can be used for machining wide range of softer as well as harder materials of large thickness for different applications. The smaller size particles are used for obtaining good surface finish and precision. Ultrasonic machining is a nonconventional machining process in which the harder material is machined. 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. The process makes use of an abrasive jet with high velocity, to remove material and provide smooth surface finish to hard metallic workpieces. The smaller size particles are used for obtaining good surface finish and. It uses water jet working as a tool to cut the metal. An abrasive is small, hard particle having sharp edges and an irregular shape. Since the process is non thermal, nonchemical and nonelectrical it creates no.
Part 2 deals with thermal machining processes for example, electric discharge machining, laser beam machining, electron beam machining, etc. This is a whole working process of waterjet machining. Principle and basic process parameters of water jet machining. Plasma arc machining is a metal removal process in which the metal is removed by focusing a highvelocity jet of high temperature 11,000c to 30,000c ionized gas on the workpiece. Specifically it is used to cut intricate shapes or form. 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. Aug 19, 20 introduction to abrasive jet machining process duration. In essence it induces material removal by the erosive action of a highvelocity. In this ajm system, a focused stream of abrasive grains of al2o3 or sic carried by high pressure gas or air at a high velocity is made to impinge on the work surface through a nozzle of 0. In this video we have explained working of arasive jet machining process, we have seen the working principle, equipments used. Ultrasonic machining is mechanical machining methods. High velocity jet is aimed at a surface under controller condition.
Water jet machining an overview sciencedirect topics. The abrasive particles are held in a suitable holding device, like a tank and fed into the mixing chamber. Abrasive water jet turning awjt method also becomes very popular for hybrid machining of metals as well as nonmetals 70. Abrasive jet machining working, advantages, disadvantages. The use of abrasives to shape parts is probably the oldest material removal process. Working, advantages, limitations, applications,laser projects, pdf. When an abrasive material is used in the water for the machining process than it is called abrasive water jet machining awjm.
Research and development on abrasive water jet machining has been made to apply awjm as hybrid machining method for polishing and cleaning with high pressure abrasive water jet for better surface finish 69. During this process, its kinetic energy is converted to pressure energy. Principle of water jet machinethis process works on the basic principle of water erosion. Awjm combines abrasive jet machining with water jet machining wjm to create a unique process which overcomes their individual limitations and enhances the machining capabilities of wjm for cutting, drilling, and general cleaning of hard andor strong materials. It consists of a mixing chamber, gas filter, pressure gauge, regulator, and the nozzle. It took less than 20 minutes to make with an abrasive jet, including setup and cleanup time. Abrasives used are aluminium oxide, silicon carbide, glass powder and sodium carbonate.
A typical material removal rate for abrasive jet machining is 16 mmmin in cutting glass. Mar 29, 2017 abrasive jet machining is a nontraditional machining process which is mostly used in machining of hardened metals. The material is placed on a grid above the water tank, which serves the purpose of disbursing and capturing the energy of the. Types of unconventional machining process manufacturing working. Abrasive jet machining working, advantages, disadvantages and applications construction in abrasive jet machining, the gases employed are usually air and nitrogen.
Ajm has been applied to rough working such as deburring and rough finishing. Abrasive jet machining ajm utilizes a high velocity jet of abrasives to remove material from work surface by impact erosion. Thin jets of high pressure and high velocity have been used to cut materials such wood, coal, textiles, rocks, concrete, asbestos. 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. As abrasive jet machining ajm is similar to sand blasting and effectively removes hard and brittle materials. In the last class, we had discussed about electrical discharge machining, ultrasonic machining etc.
Abrasive water jet machiningbasic terms and working duration. Working principle of abrasive jet machining ajm process. Applications of abrasive jet machining ajm process abrasive jet machining ajm is one of the modern machining processes where high velocity jet of abrasives mixed with dehumidified pressurized gas is made to impinge the work surface, which in turn removes material by mechanical 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. These techniques utilize the abrasion power of the cutting media i. Now these high velocity abrasive particles impinge on work piece. Nov 23, 2018 electrochemical machiningecm, laser beam machininglbm. 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. It uses the kinetic energy of water particle to erode metal at the contact surface. As the tool vibrates over the work piece, abrasive particles acts. It is a non conventional machining process that performs machining without any contact between tool and work piece.
Abrasive machining involves material removal by the action of hard, abrasive particles. In order to cut harder materials like metals or granite, an abrasive material is mixed in the water. 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. Abrasive water jet machiningwjm mohit ostwal assistant professor department of mechanical engineering jodhpur institute of engineering and technology, coed, jodhpur 2122016 mohitostwal,asst. Abrasive water jet machining if there is an abrasive added it is normally. Abrasive water jet machining if there is an abrasive added it is normally added at the nozzle which has shown in below figure. In order to cut harder materials like metals or granite, an abrasive material is. It involves the use of high velocity water jet to smoothly cut a soft workpiece.
Abrasive machining techniques for biomedical device applications. A machinability study of mild steel using abrasive water. Sep 01, 2015 working principle of ultrasonic machining. The abrasive jet machining is the process of impinging the highspeed stream of abrasive particles by highpressure gas or air on the work surface through a nozzle and metal removal occurs due to erosion caused by highspeed abrasive particles. Ultrasonic machining is a mechanical type nontraditional machining process. When a highvelocity jet of water strikes the surface, the removal of material takes place.
Hello everyone welcome to engineers academy topics covered. Get an overview of ajm process, mechanism, parameters, equipment, mrr, accuracy, capability, pros and cons, applications, controlling, etc. The significant benefits of using ice jet machining over other conventional processes as well as some important work done utilising this technology. In this process, a highspeed wellconcentrated water jet is used to cut the metal.
Ultrasonic machining, water jet machining, abrasive water jet machining. This chapter introduces ice jet machining technology and describes its working principle, process parameters, and mechanism. Electrochemical machiningecm, laser beam machininglbm. The figure shown is the above abrasive jet machining. The ajm process differs from conventional sand blasting in that the abrasive is much finer and the process parameters and cutting action are carefully. 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. Working principle of abrasive jet machining ajm process in. In this process chips are not formed like conventional machining processes e. The other mechanical machining method is abrasive jet machining. They can be used on all types of materials ranging from soft metals to hardened steels and hard nonmetallic materials such as ceramics and silicon. Abrasive water jet machining wjm mohit ostwal assistant professor department of mechanical engineering jodhpur institute of engineering and technology, coed, jodhpur 2122016 mohitostwal,asst.
The time spent on ultrasonic machine entirely depends on the frequency of the vibrating tool. Let go to the descriptive details of working principle of abrasive jet machining process. 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. Jun 07, 2018 hello everyone welcome to engineers academy topics covered. Seminar abrasive jet machining full report download. Introduction to abrasive jet machining process duration. Abrasivejet machining ajm modern machining process. A highspeed high pressurize water jet is available at the nozzle exit.
These high velocity abrasive particles remove the material by micro cutting action as well as brittle fracture of the work material. Pdf as abrasive jet machining ajm is similar to sand blasting and effectively removes hard and brittle materials. In water jet machining wjm process, water jets alone without abrasives can be used for cutting. These high velocity abrasive particles remove metal by brittle fracture or erosion from work piece. Abrasive water jet machining is a nontraditional process of removal of material by impact erosion of high pressure, high velocity of water and entrained high velocity of grit abrasives on a. A study of effect of process parameters of abrasive jet. Some of the typical applications 67 are as follows. 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 water jet an overview sciencedirect topics. 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. Common uses include cutting heatsensitive, brittle, thin, or hard materials. Abrasive jet machining process, parameters, equipment, mrr. Ajm is mainly used to machine hard raw material, produce complex shape. Apr 01, 2017 today we will learn about water jet machining and abrasive water jet machining principle, working, equipments, application, advantages and disadvantages with its diagram. Abrasive jet machining is a nontraditional machining process which is mostly used in machining of hardened metals. In water jet machining, high velocity water jet is allowed to strike a given workpiece.
Water jet machining working principle, advantages and. The tool travels vertically or orthogonal to the surface of the part at amplitudes of. Ice jet machining is recognised as a clean, green, and lean technology. 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. Working of abrasive jet machining when the abrasive particles hit the work piece with a high velocity, then this impact causes a fracture. There are many parameters that influence material removal rate. Abrasive water jet cutting machine starts with a water pump. Pdf abrasive jet machining ajm is a manufacturing technology based on erosion localization and intensification. It also includes micronanofinishing processes viz, abrasive flow finishing, magnetic abrasive finishing, etc.
Jet is proud to offer a full line of metal working tools and machinery. Jun 29, 2017 cutting of hard materials have been overcome by introducing abrasives in water in wjm also called abrasive water jet machining awjm. This water jet sends to strike at the work surface. Wjm can be used to cut softer materials like plastic, rubber or wood. Between the tool and work, machining zone is flooded with hard abrasive particles generally in the form of water based slurry. How an abrasive jet machining works engineers academy. 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. Seminar abrasive jet machining full report download introduction to abrasive jet machining abrasive jet machining ajm is nontraditional manufacturing process. Abrasive machining techniques for biomedical device. A machinability study of mild steel using abrasive water jet. Ultrasonic machining, or strictly speaking the ultrasonic vibration machining, is a subtraction manufacturing process that removes material from the surface of a part through high frequency, low amplitude vibrations of a tool against the material surface in the presence of fine abrasive particles. Abrasive jet machining working, advantages, disadvantages and.
The standoff distance between work piece and nozzle is about 2mm. Parts, working principle, advantages, application and more. May 24, 2014 let go to the descriptive details of working principle of abrasive jet machining process. 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. In this machining process a focus stream of abrasive particles are forces to impinge on work piece at high velocity. Today we will learn about water jet machining and abrasive water jet machining principle, working, equipments, application, advantages and disadvantages with its diagram. Pure water jet is used to machine softer materials. A typical setup for abrasive jet machining is shown in the figure. Abrasive jet machine introduction abrasive jet machining ajm is a nontraditional machining process that can machine material without generating heat and shock abrasive jet machining ajm is commonly used for cutting, cleaning, drilling and etching operation. It also depends on the size of grains of the abrasive slurry, the rigidity and the viscosity as well. Waves are generated using magnetostrictive effects which are further converted into mechanical vibration. A study of effect of process parameters of abrasive jet machining. The water pump pressurizes the water and pumps it from a water tank or other water supply to the nozzle.
984 748 296 111 728 1499 343 660 401 594 1529 734 1325 441 329 501 912 324 598 1381 405 1336 1358 142 61 1188 1049 599 647 668 970 1439 1477