ABRASIVE JET MACHINING AND OPTIMIZATION OF PROCESS PARAMETERS

2021 ◽  
Vol 9 (5) ◽  
pp. 607-616
Author(s):  
Sachin Vinay ◽  
◽  
Sachin Bhanwal ◽  
Sahil Yadav ◽  
◽  
...  
Keyword(s):  
High Velocity ◽  
Mechanical Energy ◽  
Machining Process ◽  
Metallic Materials ◽  
Abrasive Particles ◽  
Work Surface ◽  
Abrasive Jet Machining ◽  
Optimization Of Process Parameters ◽  
Silicon Carbides ◽  
High Degree

Abrasive Jet Machining also known as micro-abrasive blasting or pencil blasting is one of the mechanical energy based economical non-traditional machining process for cutting, deburring, polishing, drilling, etching and cleaning of alloys, brittle metals and non-metallic materials due to its high degree of flexibility and low stress forces with less heat generation.In AJM process, fine abrasive grits (silicon carbides, Aluminium oxides, Sodium bicarbonate, Boron Carbides, Crushed glass and Dolomite etc.) of typically ~0.025 mm are accelerated in a high velocity (150-300 m/s) jet of gas stream or air which is generated by converting pressure energy of carrier gas or air to its Kinetic energy and hence high velocity jet and nozzle directs abrasive jet in a controlled manner towards the work surface. Small fractures are created after impacting abrasive particles on the work surface.

Design and Fabrication of Abrasive Jet Machine (AJM) & Analyzing its Performance

2019 ◽  
Vol 1 (1) ◽  
pp. 49-55
Author(s):  
Mahesh Reddy Vaddhi ◽  
M. Leela Ramesh ◽  
B Malsoor ◽  
Sai Teja
Keyword(s):  
Material Removal ◽  
High Speed ◽  
Brittle Materials ◽  
Glass Ceramics ◽  
Machining Process ◽  
Work Piece ◽  
Abrasive Particles ◽  
High Speed Stream ◽  
Abrasive Jet Machining ◽  
Gas Medium

Abrasive Jet Machining (AJM) is the process of material removal from a work piece by the application of a high speed stream of abrasive particles carried in a gas medium from a nozzle. The material removal process is mainly by erosion. The AJM can principally be wont to cut shapes in arduous and brittle materials like glass, ceramics etc. In this concept, a model of the Abrasive Jet Machine is proposed to design by taking into consideration of commercially available components. Care will be taken to use less fabricated components rather than directly procuring them, because, the lack of accuracy in fabricated components would lead to a diminished performance of the machine. To analyse its performance, Drilling of glass sheets with different abrasives and different nozzles will be carried out by Abrasive Jet Machining process (AJM) in order to determine its machinability.

scholarly journals Nonconventional Machining and Materials Processing: Proposed Design for Abrasive Jet Machining (AJM)

2021 ◽  
pp. 1-10
Author(s):  
Laura Schaefer
Keyword(s):  
Kinetic Energy ◽  
Materials Processing ◽  
Impingement Angle ◽  
Design Assessment ◽  
Abrasive Particles ◽  
Abrasive Jet Machining ◽  
Assessment Procedures ◽  
High Degree ◽  
The Impact ◽  
Impact Erosion

High degree Abrasive Jet (AJ) is applied in Abrasive Jet Machining (AJM) as a process that is based of Machine-driven Energy (MDE). The abrasives are applied in the removal of resources from work surfaces based on impact erosion. AJ is generated through the acceleration of very fine abrasive particles in considerably gas that has been pressurizes i.e. carrier gas. In this case, jets are utilized to transform this pressurized energy into kinetic energy, which is also directs jets to the work surfaces at an impingement angle. During the impact, rigid abrasive particles are used to slowly remove resources through erosion and with the assistance of brittle fracture. This paper evaluates and recommends a design for AJM. The various components have also been chosen after the relevant design assessment procedures have been done. The AJM model has been design with reference to the present components.

Grey Relation Approach in Abrasive Jet Machining Process

2019 ◽  
Author(s):  
Lijo Paul ◽  
J. Babu
Keyword(s):  
Removal Rate ◽  
Brittle Materials ◽  
Soda Lime ◽  
Machining Process ◽  
Soda Lime Glass ◽  
Abrasive Particles ◽  
Abrasive Jet Machining ◽  
Conducting Materials ◽  
Hard And Brittle Materials ◽  
Relation Approach

Abstract Micro machining of conducting and non-conducting materials with high accuracy has great demand in industries especially in machining of ceramic, brittle materials. Abrasive Jet Machining (AJM) has shown tremendous application especially in machining of hard and brittle materials. In the present paper drilling of soda lime glass has been carried out to determine the machinability under different controlling parameters. A set of L9 series experiments were carried out by varying process parameters such as Stand Off Distance (SOD), Silicon carbide abrasive particles mesh sizes and jet pressure. Material Removal Rate (MRR) and Radial Over Cut (ROC), were taken as the output responses and are optimised with multi objective optimisation.

Electro Chemical Machining of Aluminum-Boron Carbide-Nanographite Composites

2016 ◽  
Vol 852 ◽  
pp. 136-141 ◽  
Author(s):  
M. Sankar ◽  
A. Gnanavelbabu ◽  
K. Rajkumar ◽  
M. Mariyappan
Keyword(s):  
Boron Carbide ◽  
Process Parameters ◽  
Material Removal ◽  
Solid Lubricant ◽  
Removal Rate ◽  
Electrochemical Machining ◽  
Machining Process ◽  
Abrasive Particles ◽  
Optimization Of Process Parameters ◽  
Machining Optimization

Non-traditional machining process had made possible the machining of hard to cut materials. Among several non-traditional processes electrochemical machining has been given attention since there occurs no burrs or tool wear. Composites with nano reinforcements had outclassed their counterparts in terms of the properties shown by the nano composites. In the present work aluminium matrix has been reinforced with boron carbide and nano graphite which is added as a solid lubricant to improve tribological properties. The composite is subjected to electrochemical machining with a view of optimizing the process parameters. The process involves introducing abrasive particles while machining which aids in machining. Optimization of process parameters was based on the response surface methodology techniques with four independent input parameters such as voltage, current, electrolytic concentration and feed rate and ECM process performance in terms of material removal rate and overcut.

Topological Synthesis of Epicyclic Gear Trains Using Vertex Incidence Polynomial

2017 ◽  
Vol 139 (6) ◽  
Author(s):  
Vinjamuri Venkata Kamesh ◽  
Kuchibhotla Mallikarjuna Rao ◽  
Annambhotla Balaji Srinivasa Rao
Keyword(s):  
High Velocity ◽  
Mechanical Energy ◽  
Gear Train ◽  
Recursive Method ◽  
Gear Pair ◽  
Simple Method ◽  
Epicyclic Gear ◽  
Thick Line ◽  
Gear Trains ◽  
Isomorphic Graphs

Epicyclic gear trains (EGTs) are used in the mechanical energy transmission systems where high velocity ratios are needed in a compact space. It is necessary to eliminate duplicate structures in the initial stages of enumeration. In this paper, a novel and simple method is proposed using a parameter, Vertex Incidence Polynomial (VIP), to synthesize epicyclic gear trains up to six links eliminating all isomorphic gear trains. Each epicyclic gear train is represented as a graph by denoting gear pair with thick line and transfer pair with thin line. All the permissible graphs of epicyclic gear trains from the fundamental principles are generated by the recursive method. Isomorphic graphs are identified by calculating VIP. Another parameter “Rotation Index” (RI) is proposed to detect rotational isomorphism. It is found that there are six nonisomorphic rotation graphs for five-link one degree-of-freedom (1-DOF) and 26 graphs for six-link 1-DOF EGTs from which all the nonisomorphic displacement graphs can be derived by adding the transfer vertices for each combination. The proposed method proved to be successful in clustering all the isomorphic structures into a group, which in turn checked for rotational isomorphism. This method is very easy to understand and allows performing isomorphism test in epicyclic gear trains.

Current Progresses of Laser Assisted Machining of Aerospace Materials for Enhancing Tool Life

2013 ◽  
Vol 690-693 ◽  
pp. 3359-3364
Author(s):  
Shou Jin Sun ◽  
Milan Brandt ◽  
John P.T. Mo
Keyword(s):  
Tool Life ◽  
Cutting Tool ◽  
State Of The Art ◽  
Aerospace Industry ◽  
Cutting Temperature ◽  
Machining Process ◽  
Metallic Materials ◽  
Aerospace Materials ◽  
Beam Position ◽  
Laser Assisted Machining

A higher strength and heat resistance are increasingly demanded from the advanced engineering materials with high temperature applications in the aerospace industry. These properties make machining these materials very difficult because of the high cutting forces, cutting temperature and short tool life present. Laser assisted machining uses a laser beam to heat and soften the workpiece locally in front of the cutting tool. The temperature rise at the shear zone reduces the yield strength and work hardening of the workpiece, which make the plastic deformation of the hard-to-machine materials easier during machining. The state-of-the-art, benefits and challenges in laser assisted machining of metallic materials are summarized in this paper, and the improvement of tool life is discussed in relation to laser power, beam position and machining process parameters.

Miniaturization of injection abrasive water jet machining process

2006 ◽  
Vol 220 (11) ◽  
pp. 1697-1705 ◽  
Author(s):  
H Orbanic ◽  
B Jurisevic ◽  
D Kramar ◽  
M Grah ◽  
M Junkar
Keyword(s):  
Water Jet ◽  
Heat Sinks ◽  
Machining Process ◽  
Process Efficiency ◽  
Abrasive Water Jet ◽  
Element Analysis ◽  
Abrasive Particles ◽  
Cutting Head ◽  
Simulation Based ◽  
Awj Cutting

This contribution presents the possibilities of applying abrasive water jet (AWJ) technology for multi-material micromanufacture. The working principles of injection and suspension AWJ systems are presented. Characteristics of this technology, such as the ability to machine virtually any kind of material and the absence of a relevant heat-affected zone, are given, especially those from which the production of microcomponents can benefit. A few attempts to miniaturize the AWJ machining process are described in the state-of-the-art preview. In order to develop and improve the AWJ as a microtool, a numerical simulation based on the finite element analysis is introduced to evaluate the effect of the size abrasive particles and the process efficiency of microsized AWJ. An ongoing project in which an improved mini AWJ cutting head is being developed, is presented. Finally, the possible fields of application are given, including a case study on the machining of miniaturized heat sinks.

Theoretical Analysis and Experimental Verification of Validity Finished by Abrasive Jet with Grinding Wheel as Restraint

2008 ◽  
Vol 53-54 ◽  
pp. 39-44
Author(s):  
Chang He Li ◽  
Shi Chao Xiu ◽  
Yu Cheng Ding ◽  
Guang Qi Cai
Keyword(s):  
Ground Surface ◽  
Hydrodynamic Pressure ◽  
Machining Process ◽  
Grinding Wheel ◽  
Workpiece Material ◽  
Machined Surface ◽  
Mean Values ◽  
Work Surface ◽  
Geometry Parameter ◽  
Parameter Values

The integration manufacturing technology is a kind of compound precision finishing process that combined grinding with abrasive jet finishing, in which inject slurry of abrasive and liquid solvent into grinding zone between grinding wheel and work surface under no radial feed condition when workpiece grinding were accomplished. The abrasive particles are driven and energized by the rotating grinding wheel and liquid hydrodynamic pressure and increased slurry speed between grinding wheel and work surface to achieve micro removal finishing. In the paper, the machining process validity was verified by experimental investigation. Experiments were performed with plane grinder M7120 and workpiece material 40Cr steel which was ground with the surface roughness mean values of Ra=0.6μm. The machined surface morphology was studied using Scanning Electron Microscope (SEM) and metallography microscope and microcosmic geometry parameters were measured with TALYSURF5 instrument respectively. The experimental results show the novelty process method, not only can obviously diminish longitudinal geometry parameter values of ground surface, but also can attain isotropy surface and uniformity veins at parallel and perpendicular machining direction. Furthermore, the finished surface has little comparability compared to grinding machining surface and the process validity was verified.

A Study of Abrasive Jet Micro-Grooving of Quartz Crystals

2010 ◽  
Vol 443 ◽  
pp. 645-651 ◽  
Author(s):  
Alireza Moridi ◽  
Jun Wang ◽  
Yasser M. Ali ◽  
Philip Mathew ◽  
Xiao Ping Li
Keyword(s):  
Predictive Models ◽  
Deep Understanding ◽  
Machining Process ◽  
Micro Machining ◽  
Machining Performance ◽  
Quartz Crystals ◽  
Abrasive Jet Machining ◽  
Model Predictions ◽  
Micro Grooving ◽  
Good Agreement

Owing to its various distinct advantages over the other machining technologies, abrasive jet machining has become a promising machining technology for brittle and hard-to-machine materials. An experimental study is presented on the micro-grooving of quartz crystals using an abrasive airjet. The effect of the various process parameters on the major machining performance measures are analysed to provide a deep understanding of this micro-machining process. Predictive models are then developed for quantitatively estimating the machining performance. The models are finally verified by an experiment. It shows that the model predictions are in good agreement with the experimental results under the corresponding conditions.

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