Resulting abrasive water jet is focused to the material through abrasive nozzle. Engineering abrasive jet machining and its appli keywords. Effect of process parameters on abrasive water jet plain. Optimization and effect of controlling parameters on ajm. The accuracy of cutting is hampered by tapering of hole due to unavoidable flaring of abrasive jet. 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. The abrasive jet is obtained by accelerating fine abrasive particles in highly mzchining gas carrier gas. The added abrasives in the water jet increase the range of cutting materials, which can be cut with a water jet drastically. It is an effective machining process for processing a variety of hard and. Abrasive machining involves material removal by the action of hard, abrasive particles. Process capability and average roughness in abrasive water. Optimization of process parameters of abrasive water jet.
Therefore optimum choice of the process parameters is essential for the economic, efficient and. Characterization and optimization of abrasive water jet. Pdf process parameters of abrasive jet machining researchgate. In this thesis, machining over the aluminum 6000 series material is done by cutting the holes with help of abrasive jet machine. In a machining process, metal removal rate mrr is the volume of metal removed from a given work piece in unit time. Gas may be supplied either from a compressor or a cylinder. Higher hydraulic pressure results in greater jet kinetic energy and opens a wider slot on the workpiece on both of the top and bottom widths. 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 work piece. The process parameters which are mainly influence the quality of machining in ajm are airgas pressure, standoff distance, nozzle diameter, traverse speed. Analysis of variance anova is carried out to optimize the awjm process parameters for effective machining.
Abrasive jet micro machining ajmm is a relatively new approach to the fabrication of micro structures. Process parameter optimization of cnc abrasive water jet. Experiments were accomplished in the indigenously built and constructed setup that was developed in the institute. Abrasive jet machine introduction abrasive jet machining ajm is a nontraditional machining process that can machine material without generating heat and shock. Selection of process parameters in abrasive waterjet cutting. 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. Mar 29, 2017 abrasive jet machining is a nontraditional machining process which is mostly used in machining of hardened metals. Taguchis method the awj machining parameters and levels of the experiments were. Experimental investigation were conducted to assess the influence of abrasive water jet machining awjm process parameters on mrr.
This work focuses on which of the process variables affect the plain water jet pwj milling process of pockets. Owing to the irregularities that are typically found on the workpieces cut with higher jet feed rates vf, additional surface finish operations may. Pdf optimization of process parameters of abrasive jet machining. Among this abrasive jet machining ajm is producinghole in low cost as compared to other processes drilling rates up to about 1inch per minute 25 mm min.
Experimental investigation on modified air abrasive jet. In this machining process a focus stream of abrasive particles are forces to impinge on work piece at high velocity. This paper deals with various experiment that were conducted to assess the influence of abrasive jet machining process parameters on material removal. The exit point of the stream jet lags behind the entrance point during cutting of thicker materials. The following are some of the important process parameters of abrasive jet machining. Puranik, 1student me production, 2assistant professor, 1mechanical production, 1aits, rajkot, india abstract abrasive water jet machining awjm is one of. By regulating the control valve, the metal removal rate, surface finish and various other parameters can be controlled. They considered abrasive flow rate, cutting speed and stand of distance as input process parameters. Parametric optimization of abrasive water jet machining of. The super alloys which have high strength and corrosion. Abrasive waterjet cutting is one of the nontraditional machining processes capable of cutting wide range of hardtocut materials. Process parameters of abrasive jet machining ajm are factors that influence its metal removal rate mrr. Taguchis design of experiments and analysis of variance were used to determine the effect of machining parameters on ra and t r. In the focusing, machining process variables such as water jet traverse speed, water jet pressure, standoff distance and.
The roughness of the varied surface through the cut depth was also measured and determined as a process capability index of 3 zones machined surface. Level 1 level 2 level 3 machining parameters nozzle diameter mm 3 4 5 pressure kgfcm2 4 5 6 stand of distancemm 20 30 40 the material removal rate was calculated by weighing the ceramic specimen prior to performing the. In this cutting process, a thin, high velocity water jet accelerates abrasive particles that are directed through an abrasive water jet nozzle at the material to be cut. Abrasive jet machining ajm utilizes a high velocity jet of abrasives to remove material from work surface by impact erosion. Process characteristics of abrasive jet machining ijert.
The ajm process is different from conventional sand blasting by the way that the abrasive is much finer and the process parameters. Optimisation of process parameters of abrasive waterjet machining process for carbidic austempered ductile iron cadi s. These results suggest that the taper reduces with an increase in the abrasive water jet kinetic energy and this can be achieved at optimum levels of machining parameters as shown in fig. 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. 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. Abrasives gas propulsion system supplies clean and dry air. Abrasive jet machining ajm is commonly used for cutting, cleaning, drilling and etching operation. The machining procedure is displayed in brief below. Selection of process parameters in abrasive waterjet. Abrasive jet machining ajm is a process that removes material by directing a high velocity stream of abrasive particles onto a workpiece. The removal occurs due to the erosive action of the particles striking the workpiece surface. Abrasive jet machining principle abrasive jet machining ajm is the removal of material from a work piece by the application of a highspeed stream of abrasive particles carried in gas medium from a nozzle. Optimizing the machining parameters of abrasive water jet.
The abrasive water jet shaping of materials has various variables and parameters. Most researchers identified abrasive water jet machining process parameters that greatly affect response parameter. In response portion, we followed a treatment response surface to analysis and chart the experiments. The paper presents the experimental results obtained on a specially designed abrasive jet machining setup. Abrasive water jet machining awjm is a modern trend of cutting solution that is largely implemented in the machining of difficulttocut materials such as nickel. In abrasive jet machining ajm, highly pressurized carrier gas mainly air mixed with abrasive particles is impinged on workpiece through nozzle with high velocity. During the machining process various machining parameters are considered and their affect over the machining process are observed and noted. Abrasive water jet machining awjm is an advanced nontraditional. Experimental investigation were conducted to assess the influence of abrasive water jet machining awjm process parameters on mrr of.
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. Therefore optimum choice of the process parameters is essential for. Hence in the existing work an effort has been made to optimize the cutting parameters in the awjm of ti 6al 4v alloy using gra method. Abrasive jet machining is a material removal process with the help of concentrated abrasive grains enclosed in a nozzle that removes by the action of impact erosion. Figure 2 demonstrates the factors influencing awj machining process. Abrasive jet machining ajm process, parameters, equipment. Mar 01, 2018 the present study aims to optimize the abrasive water jet machining parameters while machining aluminiumtungsten carbide composites. Ajmm is a promising technique to threedimensional machining of glass and silicon in order to realize economically viable microelectromechanical systems mems it employs a mixture of a fluid air or gas with abrasive particles. He considered the process parameters like abrasive water pressure, transvers speed and standoff distance for his studies. The paper presents an experimentalbased study of abrasive jet machining ajm considering the effect of changing process parameters. 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. Then, solid abrasive particles are added and mixed with the water jet. Effect of process parameters on abrasive water jet plain milling.
Pdf effect of abrasive water jet machining parameters on. It was equipped with kmt jetline50, 550000psi, ultrahigh pressure pump. The aim of this article is to set a solid background on awjm machining in hybrid structures and on the influence of cutting parameters on. 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 variables that influence the rate of metal removal and accuracy of machining in this process is. A dust collection system is a basic requirement to prevent atmospheric pollution and health hazards. The objective of this study was to examine the effects of abrasive water jet machining variables like cutting speed of the stainless steel material.
The abrasive water jet deflects as it enters into the workpiece. The abrasive water jet machining process is characterized by large number of process parameters that determine efficiency, economy and quality of the whole process. Get an overview of ajm process, mechanism, parameters, equipment, mrr, accuracy, capability, pros and cons, applications, controlling, etc. These high velocity abrasive particles remove metal by brittle fracture or erosion from work piece. The exit point of the stream jet lags behind the entrance. Abrasive jet machining construction, working and uses with pdf. Abrasive jet machining ajm is the removal of material from a work piece by the application of a high speed stream of abrasive particles carried in gas medium from a nozzle. A study of effect of various process parameters on abrasive. The effects of various input parameters such as standoff distance, mixture ratio. Investigations were carried on 2, 4, 6, 8 and 10 wt% tungsten carbide reinforced composite specimens fabricated by stir casting technique. In response portion, we followed a treatment response surface to.
Abrasive water jet machining awjm process has many advantages for potential applications but it has some limitations such as stream lag, cone, and taper effect 67. The use of abrasives to shape parts is probably the oldest material removal process. Abrasive water jet machining awjm is the nontraditional material removal process. Process parameter optimization for abrasive water jet machining of. Bijoy bhattacharyya, biswanath doloi, in modern machining technology, 2020. Hence in the existing work an effort has been made to optimize the cutting parameters in the. Machining parameters level 1 level 2 level 3 pressure in mpa 8 207 276 standoff distance in mm 1. Optimisation of process parameters of abrasive waterjet. Abrasive jet machining ajm is a nonconventional machining process where a highpressure air stream with small abrasive particles to impinge the work surface. Experiments are conducted to study the influence of various process parameters of abrasive water jet machining on material removal rate mrr and surface roughness ra of inconel718. This process incurs relatively higher initial investment, maintenance and operating costs. Abrasive jet machining construction, working and uses.
Abstract abrasive waterjet cutting is one of the nontraditional. Analyzing and optimizing the process parameters, thus one can find optimized parameters for this process. An empirical study of parameters in abrasive jet machining. The demand for micro products is rapidly increasing in chemical, marine and aerospace industries. Many works have been reported on the modifying setup in di. The highvelocity jet of gas takes away with it the abrasive particles and the eroded workpiece material. This jet is used to remove unwanted material from the workpiece. Pdf abrasive jet machining ajm also known as abrasive microblasting or pencil blasting is an abrasive blasting machining process that. Air, nitrogen and carbon dioxide to propel the abrasive particles. Selection of abrasives depends on mrr, type of work material, machining accuracy. The process parameter like standoff distance, impact angle, traverse rate, number of passes, abrasive material, abrasive particle size, abrasive shape, and abrasive mass flow rate, focusing.
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. Greyfuzzy methodbased parametric analysis of abrasive water jet. The effect of abrasive waterjet machining parameters on the. No ajm parameter condition 1 type of abrasive silicion carbide 2 abrasive size 80 3 jet pressure 512 kgcm2 4 standoff distance 812. They have been used numerical optimization technique to determine optimum process parameters for minimization of kerf width and anova is used to. Optimization of machining parameters of abrasive jet. The abrasive jet erodes the workpiece material thus machining the workpiece. Patil2 1pg student, government college of engineering, aurangabad, maharas htra. In abrasive jet machining, a highvelocity jet containing abrasive particles is aimed at the workpiece surface under controlled conditions. A study of effect of various process parameters on. This paper gives an overview of previously carried research on process parameters and development of abrasive jet machining and abrasive water jet machining. Seminar abrasive jet machining full report download. Abrasive jet water machining of ti 6al 4v was prevailing optimization of machining parameters did not receive much consideration. Factors affecting surface finish of abrasive water jet.
Introductionabrasive jet machining is a machining process used for cutting parts in manufacturing industries. Aug 07, 20 abrasive jet machining ajm, also called abrasive micro blasting, is a manufacturing process that utilizes a highpressure air stream carrying small particles to impinge the workpiece surface for material removal and shape generation. Mar 01, 2021 abrasive jet machining ajm process, parameters, equipment, mrr. Abrasive water jet machining an overview sciencedirect. The result is a very thin, extremely high velocity approx.
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