Papers by Keyword: Taguchi Experimental Design

Abstract: The purpose of this study was using a new approach of grey relational analysis based on Taguchi experimental design to employ the magnetic abrasive finishing (MAF) method to process the stainless AISI304 material on surface abrasive operations. The operations were demonstrated in the permanent magnetic polishing mechanism, it was installed in the CNC machining center. The operations of the parameters such as magnetic field, pole revolution, feed rate, working gap, abrasive, and lubricant, were considered. The confirmation experiments showed the optimal operational condition of surface roughness. The collected data were analyzed using a new approach of grey relational analysis to establish of abrasive magnetic finishing parameter and quality characteristic. The optimal parameter condition to process the stainless AISI304 material was conducted using two stage processes; prior to the rough polishing, the Rmax value was equal to 2.572 μm, Rmax value was 0.10 μm after the finished polishing. It could be concluded that magnetic abrasive finishing was one of the excellent technologies of getting good surface roughness with high efficiency.

Abstract: Particle reinforced metal matrix composites (SiCp/Al composites) have proved to be extremely difficult to machine with traditional cutting processes due to serious tool-wear and high machining cost, which lead to the low machining efficiency. This paper presents the results of an experimental research on mill-grinding of SiC particle reinforced aluminum matrix composites. Based on the Taguchi experimental design method, study on the material removal rate was carried out to gain the optimal processing parameters combination by using the analysis of S/N ratio. The detailed effect of wheel speed on material removal rate through single factor experiment was also studied. Though analysis of S/N ratio and variance, the depth of cut has greatest effect on the material removal rate, followed by feed rate. And grinding wheel speed has least effect on it. But the depth of cut and feed rate affect on the material removal rate nonlinearly. In the range of machining parameters applied, the optimal processing parameters combination gained is A2B3C3, namely, v_s=11.77m/s, v_w=100mm/min, a_p=0.8mm. Material removal rate increased at first and then there was a decreasing trend with increasing wheel speed.

Abstract: The wire electrical discharge machining (WEDM) is widely used for machining workpieces having complex geometries. A wire electrode of diameter 0.25 mm is moved coaxially between two guides and electrical energy in the form of electrical pulses is applied to remove material from the workpiece. In this study, the effect of key process parameters on wire wear of shallow cryogenic treated brass wire electrode used in WEDM was investigated experimentally. Five process parameters, namely Type of wire, Pulse width, Time between two pulses, Wire tension and Servo reference voltage have been considered. Taguchi experimental design has been applied to investigate the optimal parameters for minimum wire wear ratio (WWR). The experimental results indicate that Type of wire; Pulse width and Time between two pulses have a significant effect on WWR. The analysis of variance of mean and analysis of variance of S/N ratio on data was performed to identify the significant factors in order to establish the relative significance of parameters for WWR. It is found experimentally that shallow cryogenic treatment decreases the WWR. Increasing pulse width increases the WWR, where as increasing Time between two pulses decreases WWR. The results have been validated by three confirmation runs for optimum WWR.