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.

Tool Wear and Form Accuracy in Ultrasonic-Assisted Milling of Soda-Lime Glass

2018 ◽  
Vol 786 ◽  
pp. 206-214
Author(s):  
Yasmine El-Taybany ◽  
Mohab Hossam ◽  
Hassan El-Hofy
Keyword(s):  
Tool Wear ◽  
Brittle Materials ◽  
Soda Lime ◽  
Machining Process ◽  
Depth Of Cut ◽  
Soda Lime Glass ◽  
Form Accuracy ◽  
Ultrasonic Assisted ◽  
Hard And Brittle Materials ◽  
Vibration Assistance

Machining of hard and brittle materials is inherently involved with tool wear, which influences the dimensional and form accuracy of the machined product. Ultrasonic-assisted machining process is suitable for hard-to-cut materials such as ceramics, glass, and metal matrix composites, etc. In the current study, the mechanism of tool wear is investigated during ultrasonic-assisted milling of soda-lime glass as one of hard and brittle materials. Ultrasonic-Assisted Milling (UAM) combines the material removal mechanism of grinding and the milling kinematics with ultrasonic assistance. The effect of different process parameters, i.e. feed rate, depth of cut, cutting fluid, and ultrasonic vibration assistance on the tool wear behavior are investigated. Form accuracy of the machined slots is also investigated. The results showed that UAM produces less tool wear than conventional milling (CM). However, CM gives less error in the slot dimensions than UAM.

Modeling and Optimization of Ultrasonic Machining Process Using a Novel Evolutionary Algorithm

2019 ◽  
pp. 153-174
Author(s):  
Mantra Prasad Satpathy ◽  
Bharat Chandra Routara
Keyword(s):  
Evolutionary Algorithm ◽  
Removal Rate ◽  
Ceramic Matrix Composites ◽  
Imperialist Competitive Algorithm ◽  
Soda Lime ◽  
Soda Lime Glass ◽  
Ultrasonic Machining ◽  
Hard And Brittle Materials ◽  
Experimental Values ◽  
Single Response

Ultrasonic machining (USM) is one of the non-conventional techniques for machining of hard and brittle materials like glass, ceramics, and ceramic matrix composites. The objective of the study includes the investigation of material removal rate (MRR), hole oversize (HOS), and circularity of holes (COH) during USM of soda lime glass and finding out the optimal parametric condition by an evolutionary algorithm. Taguchi philosophy was employed to carry out experiments using the process parameters such as power rating, abrasive slurry concentration, and static load. A novel optimization algorithm called imperialist competitive algorithm (ICA) was used to obtain maximum MRR and minimum HOS and COH. This algorithm is inspired by the imperialistic competition and has several advantages over other evolutionary algorithms like its simplicity, less computational time, and accuracy in predicting the results. The Technique for order of preference by similarity to ideal solution (TOPSIS) is utilized to convert these multiple performance characteristics to a single response. Moreover, the prediction outcomes of this TOPSIS integrated ICA methodology demonstrates excellent conformity with the experimental values and can be applied to solve complex problems.

A 3D Spark Model to Evaluate MRR in ECDM

2019 ◽  
Vol 18 (03) ◽  
pp. 435-446 ◽  
Author(s):  
Dilpreet Singh ◽  
Mudimallana Goud
Keyword(s):  
Removal Rate ◽  
Convection Heat Transfer ◽  
Soda Lime ◽  
Spark Discharge ◽  
Machining Process ◽  
Soda Lime Glass ◽  
Chemical Action ◽  
Electrochemical Discharge Machining ◽  
Element Simulation ◽  
Advanced Machining

Electrochemical discharge machining (ECDM) is an advanced machining process which uses both chemical action and spark discharge method for removal of materials. Till date, most of the applications of ECDM are in machining nonconductive materials, although some authors have also tried machining conductive materials. This paper attempts to develop a finite element simulation model based on heat generation in the spark region to evaluate material removal rate (MRR) in case of quartz and soda lime glass. The calculation of MRR is based on melting and evaporation of the material due to high temperature generated due to spark discharge. Convection heat transfer is also considered in the analysis. The results obtained from the simulation are compared with available experimental results and previous simulation results. Although this process is not used in the industry till now, it has a lot of scope for research and development.

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.

Characterisation of Micro Channels in Electrochemical Discharge Machining Process

2014 ◽  
Vol 490-491 ◽  
pp. 238-242 ◽  
Author(s):  
Lijo Paul ◽  
Somashekhar S. Hiremath
Keyword(s):  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Soda Lime ◽  
Machining Process ◽  
Soda Lime Glass ◽  
Micro Channels ◽  
Hybrid Machining Process ◽  
Response Surface Modelling ◽  
Experimental Values ◽  
Machining Operations

Micromachining techniques has increased the demand for precise and accurate instruments which are used in many industries. Glass materials offer higher challenges in micro machining as they are tough, non-conducting and difficult to machine with conventional machining operations. Electro Chemical Discharge Machining (ECDM) is a new non-conventional hybrid machining process which combines the features of Electrical Discharge Machining (EDM) and Electro Chemical Machining (ECM) to machine both conducting and nonconducting materials. In the present paper effect of various process parameters like voltage, concentration of electrolyte, duty factor and temperature on ECDM process are studied to obtain desired micro channels in soda lime glass. Design of Experiment (DOE) is used to plan and conduct the experiments. The Response Surface Modelling (RSM) is used for characterising non linear output responses in terms of material removal rate and surface finish. Modeled results are validated with experimental values.

Performance evaluation of newly designed nozzle on abrasive jet machining characteristics of laminated composites

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
M. Balasubramanian ◽  
S. Madhu
Keyword(s):  
Removal Rate ◽  
Dimensional Accuracy ◽  
Machining Process ◽  
Machining Time ◽  
Content Type ◽  
Abrasive Jet Machining ◽  
Glass Fibre Reinforced Polymer ◽  
Challenging Tasks ◽  
Fibre Reinforced Polymer ◽  
Glass Fibre Reinforced

Purpose The purpose of the study is to machine the composites at lower machining time with higher accuracy without causing delamination. Design/methodology/approach Abrasive jet machining is the technology appropriate for machining composite materials to obtain good dimensional accuracy without causing de-lamination. The central composite design was followed in deciding the number of experiments to be carried out. Findings The influence of abrasive jet machining process parameters on machining time, material removal rate (MRR) and kerf characteristics were investigated. The experimental results proved the newly designed internal threaded nozzle increased MRR, thereby reducing the machining time. Originality/value Machining of glass fibre reinforced polymer (GFRP) is one of the challenging tasks given its non-linear and in-homogeneous properties. In this investigation, newly developed threaded and unthreaded nozzles in machining were used for making holes on the GFRP composites.

Study on Fixed Abrasive Lapping Hard and Brittle Materials with Brazed Micro Powder Diamond Disk

2013 ◽  
Vol 589-590 ◽  
pp. 451-456 ◽  
Author(s):  
Quan Cheng Li ◽  
Jian Yun Shen ◽  
Cong Fu Fang ◽  
Xi Peng Xu
Keyword(s):  
Surface Morphology ◽  
Silicon Wafer ◽  
Removal Rate ◽  
Brittle Materials ◽  
Alumina Ceramic ◽  
Diamond Disk ◽  
Hard And Brittle Materials ◽  
Fixed Abrasive

In this study, two different arrangement lapping disks fixed with brazed diamond pellets were used to lap silicon wafer and alumina ceramic. The effects of the surface morphology, roughness, and removal rate of workpiece caused by lapping pressure, lapping time, workpiece velocity, and disc arrangement were operated with serials experiments. The results of the researches provided guidance for fixed abrasive lapping of hard and brittle materials with the brazed micro powder diamond disk.

scholarly journals Abrasive Jet Drilling of Glass using Normal-bed and Fluidized-bed AJM Setup

2020 ◽  
Vol 9 (3) ◽  
pp. 1335-1341
Keyword(s):  
Fluidized Bed ◽  
Machining Process ◽  
Work Piece ◽  
Glass Work ◽  
Fluidised Bed ◽  
Abrasive Jet Machining ◽  
Mixing Chamber ◽  
Hard And Brittle Materials ◽  
Sem Micrograph ◽  
The Impact

Abrasive Jet Machining (AJM) is a promising unconventional modern machining process used to machine hard and brittle materials. This paper focuses on machining of borosilicate-glass work piece with various grits of zircon abrasives using normal and fluidised bed mixing chamber based AJM setups.The normal AJM setup is first designed and fabricated to conduct the experiments according to the Box-Behnken design of response surface methodology. Again, some modifications are made in the existing normal mixed chamber to fabricate the fluidized bed mixing chamber based AJM setup and experiments are carried out with the same input parameters on both the AJM setups. The SEM micrograph analysis is performed to study the impact-mechanism and crack-propagation due to AJM.

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.

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