Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Taguchi


Investigation of Material Removal Rate and Surface Roughness for AISI 1015 Steel Rack Gear in Wire EDM Process

Mostafa Adel Abdullah; Safaa Kadhim Ghazi; Mustafa Mohamed

Engineering and Technology Journal, 2016, Volume 34, Issue 12, Pages 2361-2370

In this work an investigation of the effects of various process parameters of Wire-EDM like Servo Feed (SF), pulse off-time (TOFF), pulse on-time (TON), as inputs impact on surface roughness (Ra) and metal removal rate (MRR) as outputs on steel (AISI 1015) utilizing nine specimens. With servo feed (500, 600 and 700)mm/min, pulse-of time (10,30,50) μsec, pulse on-time (20,25,30) μsec.The characteristics of cutting variables were determined by implementing Taguchi experimental design method. The importance level of the cutting variables for metal removal rate and surface roughnessis determined by implementing the analysis of variance (ANOVA).

Modelling of Carburization Parameters Process for Low Carbon Steel

Abbas Khammas Hussein; Laith Kais Abbas; Jamal Jalal Dawood; Nadeen Jaafar Ismae

Engineering and Technology Journal, 2016, Volume 34, Issue 6, Pages 1069-1079

This paper representsthe carburization parameters for steel (1020) using Desirability Function Analysis-DFA. The experiments were conducted using Taguchi (L9) orthogonal array. Carburization parameters such as carburization temperature, carburization time and tempering temperature were optimized by multi - response considerations depending onmicrohardnessand were rate measurements. The optimal carburizing parameters had been determined by composite desirability value obtained from desirability function analysis while significant contribution of parameter was determined by analysis of variance (ANOVA). The analyses results showed that optimal combination for higher hardness and lower wear rate were at (A2=920 oC, B2= 3 hours and C3=120 oC). Confirmation test was also conducted to validate the test results. Mathematical models for composite desirability, microhardness and rate wear were determined. Experimental results showed that the carburization performance can be improved effectively through desirability approach.

Application of Taguchi Approache to Study the Effect of Filler Type on Tribological Behavior of Polymer Composite Under Dry Conditions

Drai Ahmed Smait; Farag Mahel Mohammed; Hussam Lefta Alwan

Engineering and Technology Journal, 2014, Volume 32, Issue 8, Pages 1916-1930

The tribological behaviour of a G-P ( glass-polyester ) composite system and G-P composite systems interfaced with graded fillers were tested. The composite materials of G-P and G-P reinforced with SiC and Graphite particles as secondary fillers were experimentally investigated under varying loads, sliding velocities with dry surfaces by using a Pin-on-Disc test machine. A plan of experiments, based on the techniques of Taguchi, were performed to acquire data in a controlled way. An L9 Orthogonal array was selected for analysis of the data. Investigations to find the influence of additives, applied load, sliding speed on wear rate, wear resistance as well as the coefficient of friction during wearing process were carried out using ANOVA analysis and regression equation for each response. The model was chosen as "smaller is better" characteristics to analyse the dry sliding wear and friction while "larger is better" for sliding wear resistance. Results show that the additives have the highest influence followed by load and sliding speed. Finally, confirmation tests were performed to verify the experimental results foreseen from the mentioned correlations