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.

Design and Fabrication of Abrasive Jet Machine (AJM)

2020 ◽  
Vol 22 (4) ◽  
pp. 1471-1482
Author(s):  
P. S. V. Ramana Rao ◽  
A. Lakshumu Naidu ◽  
S. Kona
Keyword(s):  
Material Removal ◽  
High Speed ◽  
Pressure Gauge ◽  
Glass Ceramics ◽  
Work Piece ◽  
Abrasive Particles ◽  
Abrasive Jet Machining ◽  
Hard And Brittle Materials ◽  
Dust Filter ◽  
Design Calculations

AbstractAbrasive 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 or air medium from a nozzle. The material removal process is mainly by erosion. The AJM will chiefly be used to cut shapes in hard and brittle materials like glass, ceramics etc. the machine will be automated to have 3 axes travel. The different components of AJM are Compressor, Vibrator, dehumidifier, Pressure Regulator, and Dust filter, Nozzle, Pressure gauge etc. The different components are selected after appropriate design calculations. In paper contains the Abrasive Jet Machine design and fabrication by using available hardware and software etc. taking into consideration of commercially available components. Care has been 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.

Compliant Control at Micro-Displacement in Hydrodynamic Suspension Ultra-Smooth Machining

2008 ◽  
Vol 53-54 ◽  
pp. 33-38
Author(s):  
Jian Ming Zhan ◽  
Zhi Qiang Cao ◽  
Ming Ming Wu ◽  
Jian Bo Zhang
Keyword(s):  
Piezoelectric Ceramic ◽  
High Speed ◽  
Dynamic Pressure ◽  
Brittle Materials ◽  
Machining Process ◽  
Work Piece ◽  
Abrasive Particles ◽  
Machining Quality ◽  
Compliant Control ◽  
Polishing Tool

Hard-brittle materials can be polished by hydrodynamic suspension, which is based on the theory of sound eradiating. Owing to the high-speed rotating of the polishing tool, the polishing slurry would form dynamic pressure in the clearance between the work-piece and the tool. The dynamic pressure supplies abrasive particles the energy needed to impact on the work-piece surface, so the dynamic pressure will directly affect the machining effect. In order to obtain the steady and consistent machining quality, it’s necessary to implement the compliant control in the machining process, and adjust the dynamic pressure when needed. This paper utilizes piezoelectric ceramic micro-displacement actuating to investigate the technique that can achieve the control of micro-displacement between the polishing tool and the work-piece. It provides an effective mean for hydrodynamic slurry pressure in the hydrodynamic suspension ultra-smooth machining.

Analysis and Validation of Erosion Process by Sea Sand as an Abrasive Material by Using Regression Model and Neural Network in Abrasive Jet Machining Process for Alumina

2014 ◽  
Vol 592-594 ◽  
pp. 854-858
Author(s):  
N.S. Pawar ◽  
R.R. Lakhe ◽  
R.L. Shrivastava
Keyword(s):  
Regression Model ◽  
Feed Rate ◽  
Material Removal ◽  
Removal Rate ◽  
Machining Process ◽  
Variable Pressure ◽  
Work Piece ◽  
Abrasive Jet Machining ◽  
Mixing Chamber ◽  
Micro Grooving

According to the most of the studies dealing with micro grooving, cutting, leading to lower material removal Abrasive jet machining is traditional process. Invention was made to create those needs. A number of investigation or researches were carried out by imminent personality but no detailed information and design has provided about cylindrical vibrating chamber or mixing chamber. This change in shape gives better velocity to abrasive particles and non sticking characteristic gives the better effect of erosion of material on work piece and scattering of particle towards objects. The parameter stand off distance, variable pressure, material removal rate used for this experimental study has also moderate. The work carried out with Alumina nozzle. The abrasive powder feed rate is controlled by the amplitude of mixing chamber. The root mean square value is 0.988 in linear regression model. The estimated standard error is 0.00115 which is very less. The performance of sand gives the similar better model result as given by traditional using different parameter. The taper of cut is higher with this mixing particle and better feed rate.

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.

Numerical Simulation of Cutting Force in High Speed Machining of Inconel 718

2020 ◽  
Vol 856 ◽  
pp. 43-49
Author(s):  
Santosh Kumar Tamang ◽  
Nabam Teyi ◽  
Rinchin Tashi Tsumkhapa
Keyword(s):  
Cutting Force ◽  
Inconel 718 ◽  
High Speed ◽  
Experimental Results ◽  
Machining Process ◽  
Experimental Result ◽  
Work Piece ◽  
High Speed Machining ◽  
Numerical Result ◽  
3D Software

Machining is one of the major manufacturing processes that converts a raw work piece of arbitrary size into a finished product of definite shape of predetermined size by suitably controlling the relative motion between the tool and the work. Lately, machining process is shifting towards high speed machining (HSM) from conventional machining to improve and efficiently increase production, and towards dry machining from excessive coolant used wet machining to improve economy of production. And the tools used are mostly hardened alloys to facilitate HSM. The work piece materials are continually improving their properties by emergence and development of newer and high resistive super alloys (HRSA). In this paper an attempt has been made to validate an experimental result of cutting force obtained by performing HSM on an HRSA Inconel 718, by comparing it with the numerical result obtained by simulating the same setting using DEFORM 3D software. Based on the comparison it is found that the simulated results exhibit close proximity with the experimental results validating the experimental results and the effectiveness of the software.

Development of the improved Preston equation for abrasive flow machining of aerofoil structures and components

2018 ◽  
Vol 233 (9) ◽  
pp. 1397-1404 ◽  
Author(s):  
Kai Cheng ◽  
Yizhi Shao ◽  
Mitul Jadva ◽  
Rodrigo Bodenhorst
Keyword(s):  
Surface Roughness ◽  
Material Removal ◽  
Machining Process ◽  
Dynamics Simulation ◽  
Abrasive Machining ◽  
Abrasive Particles ◽  
Abrasive Flow Machining ◽  
Flow Features ◽  
The Media ◽  
Experimental Trials

The paper presents an improved Preston equation, which aims to be part of the industrial application to abrasive flow machining. The equation will aid the engineers to optimise the process for desired surface roughness and edge tolerance characteristics on complex geometries in an intuitive and scientific manner. The methodology presented to derive the equation underpins the fundamental cutting mechanics of abrasive machining or polishing assuming all abrasive particles within the media are spherical as manufacturers defined. Further to derivation, full four factorial experimental trials and computational fluid dynamics simulation are implemented to generate the flow features of media on coupon to evaluate and validate the equation for its competency and accuracy on prediction of material removal. The modified Preston equation can significantly contribute to optimise the abrasive flow machining process, and will advantage the integrated machine design to predict better virtual surface roughness and material removal rates.

Reduction of Vibrations due to Unbalance with Anti-Vibration Clearance Angle in High Speed Milling

2016 ◽  
Vol 836-837 ◽  
pp. 161-167
Author(s):  
Anna Thouvenin ◽  
Xin Li ◽  
Ning He ◽  
Liang Li
Keyword(s):  
Material Removal ◽  
High Speed ◽  
Removal Rate ◽  
Machining Process ◽  
High Speed Machining ◽  
Machining Processes ◽  
High Speed Milling ◽  
Clearance Angle ◽  
Fast Solution ◽  
Considerable Problem

High speed milling is one of the most commonly used machining processes in many fields of the industry. It is regarded as a simple and fast solution to achieve a high material removal rate, which allows an important production of parts. Unbalance is a problem in any machining process but becomes a considerable problem when reaching high speed machining. The vibrations due to an unbalanced tool or tool holder can result in a poor surface quality and a damaged tool. The damping of the vibrations can be achieved with a specially designed tool showing an anti-vibration clearance angle. This paper shows the influence of the anti-vibration clearance angle by a computational model and a set of experiments to see if it can reduce or suppress the vibrations due to unbalance in high speed milling.

Electro-thermal-based finite element simulation and experimental validation of material removal in static gap single-spark die-sinking electro-discharge machining process

2016 ◽  
Vol 231 (1) ◽  
pp. 28-47 ◽  
Author(s):  
Saeed Assarzadeh ◽  
Majid Ghoreishi
Keyword(s):  
Material Removal ◽  
Thermal Flux ◽  
Machining Process ◽  
Work Piece ◽  
Discharge Time ◽  
Materials Properties ◽  
Element Simulation ◽  
Single Discharge ◽  
Plasma Radius ◽  
Set Up

Existing single spark models are subjected to too simplistic assumptions such as uniform or point heat source, constant plasma radius, invariable materials properties and constant surface temperature during discharge making them far from reality. In this study, more realistic assumptions including Gaussian type distribution of spark heat flux, temperature dependent materials properties, latent heat of melting and expanding plasma channel with pulse current and time have been made to establish a comprehensive modeling platform. The ABAQUS FEM software has been used to simulate the mechanism of crater formation due to a single discharge. The non-uniform thermal flux was programmed through the DFLUX subroutine. The simulation results show that the temperature of work piece decreases as the discharge time increases while the volume of melted and evaporated material increases. A specially designed single spark experimental set-up was developed in laboratory to carry out a few single spark tests for verification purposes. The obtained craters morphologies were examined by optical microscopy and scanning profilometer. It has been shown that the present approach outperforms other previously developed thermal models with respect to cavity outline and size possessing the maximum confirmation errors of 18.1% and 14.1% in predicting crater radius and depth, respectively. Parametric analysis reveals that the melting boundary moves onward by increasing discharge current, whereas it moves back prolonging discharge time. Finally, a closer proximity to experimental material removal rates than those predicted by analytical approach has been recognized which confirms its more precise generalization capabilities towards the real state EDM process.

Magnetic Field Assisted Electrical Discharge Machining of AISI 4140

2014 ◽  
Vol 592-594 ◽  
pp. 479-483 ◽  
Author(s):  
Hemant Walkar ◽  
Vijaykumar S. Jatti ◽  
T.P. Singh
Keyword(s):  
Magnetic Field ◽  
Material Removal ◽  
High Efficiency ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Tool Material ◽  
Machining Process ◽  
Work Piece ◽  
Electrical Parameters ◽  
Machining Performance

Electric discharge machining (EDM) is a non-conventional machining process in which material removal take place by a series of electric spark generated between the small gap of both electrode and both immersed in dielectric medium. The gap conditions of EDM significntly affect the stability of machining process. Thus, the machining performance would be improved by removing the debris from the machining gap fastly. In view of this, the objective of present work was to investigate the effect of magnetic field on the material removal rate (MRR) and surface roughness (SR), in conjunction with the variation of electrical parameters like pulse on-off times and gap current, while keeping other electrical parameters and work piece/ tool material constant. Experimental results showed that the magnetic field assisted EDM improves the process stability. Moreover, the EDM process with high efficiency and quality of machined parts could fulfill the requirements of modern manufacturing industries.

scholarly journals Research into the Disintegration of Abrasive Materials in the Abrasive Water Jet Machining Process

2021 ◽  
Author(s):  
Andrzej Perec
Keyword(s):  
Method Of Moments ◽  
High Speed ◽  
Water Jet ◽  
Machining Process ◽  
Abrasive Water Jet ◽  
Abrasive Particles ◽  
Cutting Head ◽  
Grain Distribution ◽  
Awj Cutting ◽  
Ward Method

The size and distribution of abrasive particles have a significant influence on the effectiveness of the cutting process by the high-speed abrasive water jet (AWJ). The paper deal with the abrasive materials disintegration intensity in AWJ cutting during the creation of the abrasive jet. An evaluation of the abrasive materials grabbed after forming in the cutting head was carried out and its grain distribution was evaluated. Used here the arithmetic, geometric and logarithmic method of moments and Folk and Ward method. The influence of abrasive concentration of abrasive materials as alluvial garnet, recycled garnet, corundum, and olivine on grain distribution was studied. A recovery analysis was also carried out and the recycling coefficient for each tested abrasive material was determined.

Sign in / Sign up

Export Citation Format

Share Document