Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Taguchi method

Surface Roughness Evaluation in WEDM Using Taguchi Parameter Design Method

S.H. Aghdeab; V.N. Najm; A.M. Saleh

Engineering and Technology Journal, 2018, Volume 36, Issue 1, Pages 60-64

Machining of hard metal is difficult by conventional method to obtain high accuracy where the dimensional accuracy is the main factor. Wire electrical discharge machining (WEDM) extensively used, which is mostly used in machining of conductive materials by using precisely controlled sparks that occur between a very thin wire and a workpiece in the presence of a dielectric fluid. This study serves in studying surface roughness (SR) of high speed steel (HSS) using taguchi method to design the experiment, this was achieved with utilizing different wire cut machining parameters and study the behavior of these control parameters such as pulse duration (μs), pulse interval (μs), Servo feed and Servo voltage (V) on surface roughness. It can be noticed that when servo voltage and servo feed increase the surface roughness decreases and when pulse duration and pulse interval increase the surface roughness increases too, and It was found with using taguchi parameter design that the best machining variables of combination setting is Servo Voltage (22) volts, Pulse on time (110) μs, servo feed (450) mm/min and Pulse off time (30) μs to reach to the minimum value of surface roughness and hence better surface finish.

Optimization of MRR and Surface Roughness for 7024 AL-alloy in EDM Process

M.M. Abdulrazaq; S.K. Ghazi

Engineering and Technology Journal, 2017, Volume 35, Issue 5, Pages 546-553

Electro discharge machining is major non-traditional operations for cutting the materials due to its suitability and benefits. The experimental work of this paper deals with electrico discharge machining (EDM). A system for machining in this process has been developed. Many parameters are studied such as current, time on and time off. Different current rates are used ranging from (30, 36 and 42) Amp, found that low current gives less material removal rates and good surface roughness. The results showing that maximum MRR is achieved (0.525) mm3/min when machining current (42), time on (150), and time off (50) while good surface roughness (2.11 μm) when machining current (30), time on (50), and time off (25).The level of importance of the machining parameters for surface roughness and material removal rate is determined by using Taguchi design experiments and analysis of variance (ANOVA).

The Effects of Process Parameters on Residual Stresses in Single Point Incremental Forming of A1050 Aluminum Using ANOVA Model

M. Kamal; S. Mohammed; A.S. Bedan

Engineering and Technology Journal, 2017, Volume 35, Issue 1, Pages 41-48

Incremental sheet metal forming is a modern technique of sheet metal forming in which a uniform sheet is locally deformed during the progressive action of a forming tool. The tool movement is governed by a CNC milling machine. The tool locally deforms and by this way the sheet with pure deformation stretching. The aim of the present work is to inspect, experimentally, the state of the residual stresses induced in SPIF parts made by A1050 aluminum. The forming surface was measured at four different angles using a ORIONRKS 6000 test (the X-ray diffraction technology was used to detect the residual stress) measuring instrument with the angles (0o, 15o, 30o and 45o) and the average residual stress value is recorded in (MPa), the residual stress in original blanks is (-6.29MPa). This specialized stress analysis system using the side-inclination method includes stress analysis software, the stress analysis sample stand and X-ray tube. A comparison study is made for tabulated values and experimental values for residual stress by using ANOVA model with the contribution of rotational speed, feed rate and forming depth with respect to residual stress is (63.7, 4.3 and 32)% respectively..

Prediction of Bead Width In Submerged ArcWelding of Low Carbon Steel (AISI 1005)

Husham Jawad Kadhim; Ahmed Ali Akbar Akbar

Engineering and Technology Journal, 2015, Volume 33, Issue 2, Pages 451-462

This paper used Taguchi technique to determine the optimal SAW parameters, an effort has been made to study the effect of SAW process parameters (current I, voltage V, speed S) on the weld bead width (W) of low carbon steel AISI 1005. S/N ratios are computed to determine the optimum parameters. Statistical model was checked by used multiply regression method; the adequacy and significance of the model were checked by using ANOVA technique. The model employed easily in form of executed program designed by using visual basic 6 software, the objective of designed program is to predict and control weld bead width, which enable to put in the desired weld parameters and select the weld bead width. Main and Interaction effects of the process parameters on bead width were presented graphically. The experimental results were analyzed by using Minitab 16 software.

Estimation of Cutting Tool Wear in Turning using Taguchi Method Depending on Weight of the Removed Tool Metal

Hussam Lefta Alwan; Baraa M.H. Albaghdadi; Mohanned M. H. AL-Khafaji; Asaad Ali Abbas

Engineering and Technology Journal, 2014, Volume 32, Issue 1, Pages 24-33

This paper focuses on using Taguchi method to determine the optimum
turning parameters such as spindle speed, depth of cut, and feed rate, denoted by factor symbols A, B, and C respectively. The effect of cutting parameters on tool wear is depended on the concept of removed weight from the tool metal during machining. The material that has been used as a workpiece is high carbon steel and carbide insert DNMG 443-15 as a cutting tool. Taguchi orthogonal array L9,quality characteristic "smaller is better", and ANOVA were used to achieve the goal of the research. The results obtained showed that spindle speed is the
significant factor of the process followed by the feed rate in terms of their contribution in analysis. The optimum combination of parameters, which was found by applying Taguchi method, is that designated by A2B1C1.

Prediction the Effect of Cutting Parameters on Surface Roughness Using Taguchi Method

Laith A. Mohammed; Ahmed A. Duroobi

Engineering and Technology Journal, 2013, Volume 31, Issue 17, Pages 3334-3342

In this study, the prediction of surface roughness of milled surfaces was carried out
using Taguchi Method with four inputs, namely, cutting direction, stepover, feed per
tooth and workpiece surface geometry. A systematic approach to obtain an optimal
surface roughness was employed to consider the effects of Taguchi method for this
application using CNC milling machine with ball mill cutter. The results show that the
Taguchi method is an effective tool in predicting the optimum factors to obtain
minimum surface roughness, which are stepover, surface type, feed per tooth and
cutting direction respectively.

Taguchi Approach to Optimize Pack Aluminization Parameters in Carbon Steel Using MINITAB13

Abbas Khammas Hussein

Engineering and Technology Journal, 2009, Volume 27, Issue 11, Pages 2259-2272

Pack aluminization has been rapidly developed and widely used in many fields
due to its superior properties of coating. Surface is the only part of the component
which has to coexist with external environment. Majority of engineering failures
originate from the surfaces and components degrade in service leading to failures such
as fatigue, wear, corrosion and oxidation. The present study deals with the surface
modification of steel base through diffusion of aluminium by aluminium pack
cementation for improving wear and corrosion resistance. The material chosen for
study is medium carbon steel. Effect of varying weight percentage (wt.%) of halide
activator (NH4Cl) at different diffusion temperatures and times on the microstructure
and microhardness of aluminized specimens was studied. Taguchi robust design
technique using MINITAB13 was used to rank several factors that may affect the
microhardness and microstructure in order to formulate the optimum conditions. The
Taguchi orthogonal array L9 (33) was used for experimental design with three level of
consideration for each factor. The respone (Microhardness) was analyzed based on the
Taguchi’s signal-to-noise ratio. The use of 4%wt. of (NH4Cl) at 5hr and diffusion
temperature of 700oC seems to be the optimum condition, where the surface hardness
could be increased to 1000Hv when aluminized. X-Ray diffraction studies have been
confirmed the presence of aluminides in the surface layer, which could be instrumental
in the significant increase in the surface hardness.

Using of Taguchi Method to Optimize the Casting of Al–Si /Al2O3 Composites

Osama S. Muhammed; Haitham R. Saleh; Hussam L. Alwan

Engineering and Technology Journal, 2009, Volume 27, Issue 6, Pages 1143-1150

Taguchi method is a problem – solving tool which can improve the performance
of the product, process design and system. This method combines the experimental and
analytical concepts to determine the most influential parameter on the result response for
the significant improvement in the overall performance. In this research Al–Si /Al2O3
composites was prepared by vortex technique using three different parameters, stirring
time, stirring speed, and volume fraction of the reinforcement particles. A tensile and
hardness tests were done for the resulted castings. The primary objective is to use
Taguchi method for predicting the better parameters that give the highest tensile strength
and hardness to the castings, and then preparing composites at these parameters and
comparing them with the randomly used once. The experimental and analytical results
showed that the Taguchi method was successful in predicting the parameters that give
the highest properties and the volume fraction was the most influential parameter on the
tensile strength and hardness results of castings