Abrasive waterjet cutting is one of the nontraditional machining processes capable of cutting wide range of hardtocut materials. Selection of process parameters in abrasive waterjet. Re use of abrasives is not recommended since the cutting ability of abrasive decrease after the usage and also the contamination of wear materials clogging the nozzle and the cutting unit orifice. During abrasive jet machining process, material from a surface of workpiece is removed due to impact erosive action of finegrained abrasive particles impacting at high velocity 200400 ms. The use of abrasives to shape parts is probably the oldest material removal process. To develop a hybrid process of abrasive jet machining ajm and electrical discharge machining edm, the effects of the hybrid process parameters on machining performance were comprehensively. Three process parameters in conventional machining are i cutting speed n or cutting velocity vc, ii feed rate s and iii depth of cut t. Since the process is non thermal, nonchemical and nonelectrical it creates no. During ajm, the influence of process parameters on machining characteristics were studied using taguchi method.
Parametric optimization of abrasive water jet machining of. It is widely used in fabrication industry to machine the materials like aluminum, mild steel, copper, glass, titanium, hard rock material. The introduction of abrasives to the fluid jet enhances the machining efficiency and is known as abrasive water jet machining. This process is mainly employed for such machining works which are otherwise difficult, such as thin sections of hard metals and alloys, cutting of material which is sensitive of heat damage, producing intricate holes, deburring, etching, polishing etc. Abrasive jet machining ajm is the process of material removal from a work piece by the application of a highspeed stream of abrasive particles carried in a gas or air medium from a nozzle. 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. Nikodijevic university of nis, faculty of mechanical engineering university of nis, faculty of. In ajm the abrasive is much finer and the process parameters and cutting action are carefully controlled. Optimization of process parameters in abrasive water jet. The process makes use of an abrasive jet with high velocity, to remove material and provide smooth surface finish on hard work pieces. Investigation of machining parameters in abrasive jet. Optimization of process parameters of abrasive jet machining on.
Hastelloy which is difficult to machine by the conventional processes can be machined by using ajm. Pdf process parameters of abrasive jet machining researchgate. In abrasive jet machining abrasive particles are made to impinge on work material at high velocity. Abrasive jet machining process, parameters, equipment, mrr abrasive jet machining ajm is one of the advanced machining processes mechanical energy based where a high velocity jet of abrasives is utilized to remove material from work surface by impact erosion. 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. A machinability study of mild steel using abrasive water. The traditional methods used for machining processes like cutting and deburring can be efficiently replaced by abrasive jet machine.
An abrasive is small, hard particle having sharp edges and an irregular shape. Abrasive jet machining ajm is the process of material removal from a work piece. Abrasive machining involves material removal by the action of hard, abrasive particles. Various experiments were conducted to assess the influence of abrasive jet machine. Effect of process parameters on abrasive water jet plain. In the focusing, machining process variables such as water jet traverse speed, water jet pressure, standoff distance and abrasive flow rate have been investigated to study the effect of each on the pwj milling process parameters. The high velocity stream of abrasive is generated by converting the pressure energy of the carrier gas or. The values obtained in taguchi analysis was compared with the. Abrasive water jet machining is that manner of machining process which is known as nontraditional type machining and belongs to mechanical group of nontraditional processes. Mechanics of material removal in abrasive jet machining. The chosen process parameters are standoff distance, traverse speed and abrasive flow rate. In abrasive jet machining ajm, abrasive particles are made to impinge on the work material at a high velocity.
Features of cutting parameters and difference from influencing parameters are also discussed here. Pdf abrasive jet machining ajm also known as abrasive microblasting or pencil blasting is an abrasive blasting machining process that uses. The machining medium is solid grains suspended in an abrasive slurry in the former,while a fluid is employed in the wjm process. Design and manufacturing of abrasive jet machine for drilling. Keywords abrasive water jet machining, garnet, mild steel 1. Effects of process parameters on responses during machining ti6al4v alloy using abrasive water jet machining 1dhaval sangani,2 p. Influence of nozzle design and process parameters on. In a machining operation, the output parameter is achieved by controlling various input parameters. A study of effect of various process parameters on. Puranik, 1student me production, 2assistant professor, 1mechanical production, 1aits, rajkot, india abstract abrasive water jet machining awjm is one of. The same problem appears in abrasive water jet awj machining especially in the socalled deformation wear zone or striation zone.
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. 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. Optimization of process parameters of abrasive water jet. Process parameters of abrasive jet machining ajm are factors that influence its metal. The selected responses are material removal rate mrr and surface roughness sr. Martins engineering college, secunderabad, india 2 department of mechanical engineering, jnt university, hyderabad, india corresponding author. In the area of grit blasting, it is well known that microscopically small abrasive debris gets trapped on the surface, and due to impact the grits might cause the surface to fracture and a fraction of it to be embedded. Process parameter optimization of cnc abrasive water jet machine for titanium ti 6al 4v. The figure shown is the above abrasive jet machining. Puranik 1student me production, 2assistant professor, 1mechanical production, 1aits, rajkot, india abstract abrasive water jet machining awjm is one of the recent nontraditional methods that have been used in. This process incurs relatively higher initial investment, maintenance and operating costs. Abrasive jet machining on aluminum material youtube. Seminar abrasive jet machining full report download.
Awjm combines abrasive jet machining with water jet machining wjm to create. Pdf a study of effect of process parameters of abrasive. Therefore optimum choice of the process parameters is essential for. The metal removal rate for this type of process is usually 16mm3 min in cutting glass and the velocity of the jet ranges from 150 to 300 meters per minute. It is similar to abrasive jet machining ajm in water jet machining, high velocity water jet is allowed to strike a given workpiece. A machining operation is basically termed a material removal process, where material is removed in the form of chips. The jet of abrasive particles is carried by carrier gas or air.
Material removal processes machining is the broad term used to describe removal of material from a workpiece includes cutting, abrasive processes grinding, advanced machining processes electrical, chemical, thermal, hydrodynamic, lasers automation began when lathes were introduced in 1700s. 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. 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. Similar case happens when ice particles are introduced as in ice jet machining. Abrasive jet machining working, advantages, disadvantages. Student production mechanical, ldrpitr, gujarat, india 2lecturer, mechanical engineering, ldrpitr, gujarat, india abstract abrasive water jet machining awjm is the nontraditional material removal process. 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. Effect of process parameters on abrasive contamination. Jet of abrasive particles is carried by carrier gas or air. High velocity jet is aimed at a surface under controller condition. Optimization of process parameter in abrasive water jet machining for machining harsh a.
As the abrasive particle impacts on the surface, it causes a tiny fracture, and the gas stream carries both the abrasive particles and the fractured wear particles away. Process parameter optimization of cnc abrasive water jet. The high velocity stream of abrasive is generated by converting the pressure energy of the carrier gas or air to its kinetic energy and hence high velocity jet. Optimization of abrasive water jet machining process parameters using taguchi grey relational analysis tgra 83 conclude that the performance characteristics of the awjm process namely hydraulic pressure, abrasive mass flow rate, standoff distance and traverse rate are improved together by using gra. Schematic of abrasive jet machining 2 satyanarayana et al.
Water jet machining an overview sciencedirect topics. Optimization of process parameters of abrasive jet. The filtered gas at a pressure of 2 to 8 kgfcm 2 is supplied to the mixing chamber containing the abrasive powder and. Keywords abrasive jet machining, drilling, process parameters, kerf taper. Various abrasive particles used for machining in abrasive jet machining. Metal removal and kerf analysis in abrasive jet drilling of. The abrasive gas mixture, jet pressure, abrasive particle size and hardness are mainly responsible for the metal removal rate. Process characteristics of abrasive jet machining ijert. Optimization of process parameters in abrasive jet. Abrasive jet machining and study of process parameters.
It consists of a mixing chamber, gas filter, pressure gauge, regulator, and the nozzle. Introduction abrasive water jet machining is accepted effective technology for cutting various material as of. List of process parameters in machining cutting velocity. Sreenivasa rao2 1department of mechanical engineering, st.
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