The Experts below are selected from a list of 17124 Experts worldwide ranked by ideXlab platform

Jowlay Huang - One of the best experts on this subject based on the ideXlab platform.

  • Effect of the Electrical Discharge Machining on strength and reliability of TiN/Si3N4 composites
    Ceramics International, 2003
    Co-Authors: Jowlay Huang
    Abstract:

    Conductive TiN/Si3N4 hot pressed composites were processed by Electrical Discharge Machining (EDM) and their microstructure and conductivity investigated. The dependence of surface texture, surface roughness, and materials removal rate on Electrical Discharge Machining conditions including working voltage and feed rate were also analyzed. The flexural strength and strength reliability in terms of Weibull modulus of TiN/ Si3N4 processed by EDM and conventional cutting and polishing are compared. Higher working voltage and current, as well as higher content of TiN result in greater material removal rate. Comparison of the flexural strength and Weibull modulus of the composites processed by EDM with conventional polished samples revealed that the surface with low roughness lead to an increase in strength and reliability for Electrical Discharge Machining.

  • effect of the Electrical Discharge Machining on strength and reliability of tin si3n4 composites
    Ceramics International, 2003
    Co-Authors: Jowlay Huang
    Abstract:

    Conductive TiN/Si3N4 hot pressed composites were processed by Electrical Discharge Machining (EDM) and their microstructure and conductivity investigated. The dependence of surface texture, surface roughness, and materials removal rate on Electrical Discharge Machining conditions including working voltage and feed rate were also analyzed. The flexural strength and strength reliability in terms of Weibull modulus of TiN/ Si3N4 processed by EDM and conventional cutting and polishing are compared. Higher working voltage and current, as well as higher content of TiN result in greater material removal rate. Comparison of the flexural strength and Weibull modulus of the composites processed by EDM with conventional polished samples revealed that the surface with low roughness lead to an increase in strength and reliability for Electrical Discharge Machining.

Qingsong Zhang - One of the best experts on this subject based on the ideXlab platform.

  • an investigation of ultrasonic assisted Electrical Discharge Machining in gas
    International Journal of Machine Tools & Manufacture, 2006
    Co-Authors: Qinghe Zhang, Ruxu Du, Jiandong Zhang, Qingsong Zhang
    Abstract:

    This study focuses on using ultrasonic to improve the efficiency in Electrical Discharge Machining (EDM) in gas medium. The new method is referred to as ultrasonic-assisted Electrical Discharge Machining (UEDM). In the process of UEDM in gas, the tool electrode is a thin-walled pipe, the high-pressure gas medium is applied from inside, and the ultrasonic actuation is applied onto the workpiece. In our experiment, the workpiece material is AISI 1045 steel and the electrode material is copper. The experiment results indicate that (a) the Material Removal Rate (MRR) is increased with respect to the increase of the open voltage, the pulse duration, the amplitude of ultrasonic actuation, the Discharge current, and the decrease of the wall thickness of electrode pipe; and (b) the surface roughness is increased with respect to the increase of the open voltage, the pulse duration, and the Discharge current. Based on experimental results, a theoretical model to estimate the MRR and the surface roughness is developed.

Qinghe Zhang - One of the best experts on this subject based on the ideXlab platform.

  • an investigation of ultrasonic assisted Electrical Discharge Machining in gas
    International Journal of Machine Tools & Manufacture, 2006
    Co-Authors: Qinghe Zhang, Ruxu Du, Jiandong Zhang, Qingsong Zhang
    Abstract:

    This study focuses on using ultrasonic to improve the efficiency in Electrical Discharge Machining (EDM) in gas medium. The new method is referred to as ultrasonic-assisted Electrical Discharge Machining (UEDM). In the process of UEDM in gas, the tool electrode is a thin-walled pipe, the high-pressure gas medium is applied from inside, and the ultrasonic actuation is applied onto the workpiece. In our experiment, the workpiece material is AISI 1045 steel and the electrode material is copper. The experiment results indicate that (a) the Material Removal Rate (MRR) is increased with respect to the increase of the open voltage, the pulse duration, the amplitude of ultrasonic actuation, the Discharge current, and the decrease of the wall thickness of electrode pipe; and (b) the surface roughness is increased with respect to the increase of the open voltage, the pulse duration, and the Discharge current. Based on experimental results, a theoretical model to estimate the MRR and the surface roughness is developed.

Y.s. Tarng - One of the best experts on this subject based on the ideXlab platform.

  • optimization of the Electrical Discharge Machining process based on the taguchi method with fuzzy logics
    Journal of Materials Processing Technology, 2000
    Co-Authors: J L Lin, Kuanwen Wang, Biinghwa Yan, Y.s. Tarng
    Abstract:

    Abstract In this paper, the application of the Taguchi method with fuzzy logic for optimizing the Electrical Discharge Machining process with multiple performance characteristics has been reported. A multi-response performance index is used to solve the Electrical Discharge Machining process with multiple performance characteristics. The Machining parameters (the workpiece polarity, pulse-on time, duty factor, open Discharge voltage, Discharge current and dielectric fluid) are optimized with considerations of the multiple performance characteristics (electrode wear ratio and material removal rate). Experimental results are presented to demonstrate the effectiveness of this approach.

  • An Investigation into Improving Worn Electrode Reliability in the Electrical Discharge Machining Process
    The International Journal of Advanced Manufacturing Technology, 2000
    Co-Authors: K. S. Wang, Y.s. Tarng
    Abstract:

    In this paper, the use of a strength-stress interference model to study electrode reliability during wear in Electrical Discharge Machining has been reported. In order to improve the electrode reliability, the Taguchi method, which is a powerful tool for parameter design of performance characteristics is used to determine Machining parameters for minimum electrode wear ratio in Electrical Discharge Machining operations. Through this study, not only is the electrode reliability improved, but also the Machining parameters that significantly affect the electrode wear ratio in Electrical Discharge Machining oper- ations are obtained. Experimental results are provided to verify this approach. To estimate the electrode reliability, it is necessary to develop a mathematical model to analyse the mechanism of electrode wear during the Electrical Discharge Machining pro- cess (2-4). In this paper, the use of a strength-stress inter- ference model (5) to study electrode reliability in Electrical Discharge Machining is reported. The effect of Machining time on electrode reliability can be evaluated based on this model. For reliability analysis purposes, how the Machining parameters affect the electrode reliability is a very important research task (6). In order to improve electrode reliability, the Taguchi method (7-9), which is a powerful tool for parametric design of performance characteristics, is used to determine the optimal Machining parameters with the minimum electrode wear ratio in Electrical Discharge Machining operations. It is shown that the Taguchi parameter design can optimise the electrode wear ratio through the settings of Machining parameters and reduce the sensitivity of the system performance to sources of variation in Electrical Discharge Machining. In what follows, the use of a strength-stress interference model to study electrode reliability is introduced first. Then, parametric design using the Taguchi method for improving the electrode wear ratio is discussed. The experimental details when using the Taguchi method of parameter design and the strength-stress interference model are described for determining the optimal Machining parameters for improving electrode reliability. The paper concludes with a summary of this study.

Kang Xinlong - One of the best experts on this subject based on the ideXlab platform.