Optimization of EDM process parameters for Al-SiC reinforced metal matrix composite

Volume 8 Issue 2 (February 201

Optimization of Process Parameters for CNC Turning using Taguchi Methods for EN24 Alloy Steel with Coated/Uncoated Tool Inserts

Coated and uncoated tool inserts offers certain degrees of control on the desired rate of tool wear and surface roughness to an extent. This work pursues the quest for realizing the optimal values for the significant process parameters that bears an influence on the response parameters. Experiments were conducted on the samples of EN 24 alloy steel material with the help of PVD coated TiAlN insert and uncoated carbide insert. The experimental runs carried out with proper variation in the levels. Levels are selected with the help of manufacturing catalogue and by pilot experimentation and results are recorded for further analysis. For this study, 9 runs designed using L9 orthogonal array of Taguchi Design of Experiment. Surface roughness was measured using a Mitutoyo surface tester at test lab and material removal rate is calculated by mathematical equation. The data was compiled into Minitab 17 software for analysis. The relationship between the machining parameters and the response variables were analyzed using the Taguchi Method. Optimization of process parameters is carried out by Grey Relational Analysis method (GRA). GRA method is a powerful and most versatile tool which can manipulate the input data as per requirement and comes with results that can be used to have best multi-objective in respective concerns

Laser dimpling process parameters selection and optimization using surrogate-driven process capability space

Remote laser welding technology offers opportunities for high production throughput at a competitive cost. However, the remote laser welding process of zinc-coated sheet metal parts in lap joint configuration poses a challenge due to the difference between the melting temperature of the steel (∼1500 C) and the vaporizing temperature of the zinc (~907 C). In fact, the zinc layer at the faying surface is vaporized and the vapour might be trapped within the melting pool leading to weld defects. Various solutions have been proposed to overcome this problem over the years. Among them, laser dimpling has been adopted by manufacturers because of its flexibility and effectiveness along with its cost advantages. In essence, the dimple works as a spacer between the two sheets in lap joint and allows the zinc vapour escape during welding process, thereby preventing weld defects. However, there is a lack of comprehensive characterization of dimpling process for effective implementation in real manufacturing system taking into consideration inherent changes in variability of process parameters. This paper introduces a methodology to develop (i) surrogate model for dimpling process characterization considering multiple–inputs (i.e. key control characteristics) and multiple–outputs (i.e. key performance indicators) system by conducting physical experimentation and using multivariate adaptive regression splines; (ii) process capability space (Cp–Space) based on the developed surrogate model that allows the estimation of a desired process fallout rate in the case of violation of process requirements in the presence of stochastic variation; and, (iii) selection and optimization of the process parameters based on the process capability space. The proposed methodology provides a unique capability to: (i) simulate the effect of process variation as generated by manufacturing process; (ii) model quality requirements with multiple and coupled quality requirements; and (iii) optimize process parameters under competing quality requirements such as maximizing the dimple height while minimizing the dimple lower surface area

Optimization Of Process Parameters On Tensile Shear Load Of Friction Stir Spot Welded Aluminum Alloy (Aa5052-h112)

Optimization of the process was still the issue in manufacturing. Investigation on the process parameters that effects to the property of welded structure were necessary. In this study, the AA5052-H32 sheets of 2 mm thick were welded using friction stir spot welding (FSSW) and tested via tensile shear load test to investigate the influence of spindle speed, tool depth, and dwell time to the tensile shear load of the joints. The result shows that in every set of parameter combination, exhibit interesting influence to the tensile shear load. The effect of spindle speed of 1000 rpm shown the good property in average 18.33 KN especially at tool depth of 3.5 mm. Furthermore, the effect of tool depth brought significant effect to the tensile shear load especially at 3.5 mm for each set of spindle speed and dwell time. The set of dwell time to parameter combination had no significant effect to the tensile shear load. The good tensile shear load could be achieved in the range of 17.7-19.3 KN at 3.5 mm of plunge depth and 1000 rpm of spindle speed, where the best one was 19.3 KN at 7s of dwell time

Determination of Terminal Sterilization Process Parameters

Time, temperature, and microbial effects on terminal heat sterilization of spacecraf

Sensitivity Analysis of Process Parameters in Laser Deposition

In laser cladding with powder injection process, process output parameters, including melt pool temperature and melt pool dimensions, are critical for part quality. This paper uses simulation and experiments to investigate the effect of the process input parameters: laser power, powder mass flow rate, and scanning speed on the output parameters. Numerical simulations and experiments are conducted using a factorial design. The results are statistically analyzed to determine the significant factors and their interactions. The simulation results are compared to experimental results. The quantitative agreement/disagreement is discussed and further research is outlined.Mechanical Engineerin

Analysis of Process Parameters in Wire EDM on D2 Tool Steel using Taguchi Method

This paper focuses on the effect of input parameters like pulse on time, pulse off time, servo voltage, and kerf width on the output characteristics of CNC wire EDM process such as material removal rate (MRR), surface roughness (SR), and kerf width (KW). The optimum process parameters and corresponding output responses are found out using Taguchi Method. In this research, High carbon high chromium D2 tool steel is used as the work piece with 0.25mm brass wire as tool

Estimating parameters for a k-GIGARCH process

Some crucial time series of market data, such as electricity spot prices, exhibit long memory, in the sense of slowly-decaying correlations combined with heteroscedasticity. To e able to model such a behaviour, we consider the k-factor GIGARCH process and we propose two methods to address the related parameter estimation problem. For each method, we develop the asymptotic theory for this estimation.GIGARCH process – estimation theory – Electricity spot prices

Effect of Process Parameters on the Single Adsorption of Zinc and Nickel ions Using Activated Carbon from Waste Nigerian Bamboo

The study focused on the effect of process parameters on the single adsorption of Zinc and Nickel ions using activated carbon from waste Nigerian bamboo.nbsp The bamboo was cut into sizes, washed,nbsp dried and carbonized at 300oC-500oC. The carbonized bamboo was then activated at 800oC using nitric acid.nbsp The effect of process parameters such as particle size, carbon dosage, initial concentration of adsorbate on the single adsorption of Zinc and Nickel ions in aqueous solution was also investigated and were found to significantly affect the adsorption capacity of Zinc and Nickelnbsp ions in solution using activated carbon from waste Nigerian bamboo. For optimum adsorption of Zinc and Nickel ions in solution, particle size of Nigerian bamboo activated carbon less than 150 mm should be used for batch operations. The amount of Nickel ions adsorbed at equilibrium within initial adsorbate concentration of 28mg/L - 223mg/L was 28mg/g - 170mg/g, while The amount of Zinc ions adsorbed at equilibrium within initial concentration of 28mg/L - 227mg/L was 26mg/g - 185mg/gnbsp for carbon dosage of 10g/L .nbsp The results obtained showed that Nigerian Bamboo is highly effective in the single adsorption of Zinc and Nickel ions in solution