The Experts below are selected from a list of 100704 Experts worldwide ranked by ideXlab platform
Hoshiun Lee - One of the best experts on this subject based on the ideXlab platform.
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optimization of machining parameters in Magnetic Force assisted edm based on taguchi method
Journal of Materials Processing Technology, 2009Co-Authors: Yancherng Lin, Yuanfeng Chen, Deran Wang, Hoshiun LeeAbstract:Abstract A versatile process of electrical discharge machining (EDM) using Magnetic Force assisted standard EDM machine has been developed. The effects of Magnetic Force on EDM machining characteristics were explored. Moreover, this work adopted an L18 orthogonal array based on Taguchi method to conduct a series of experiments, and statistically evaluated the experimental data by analysis of variance (ANOVA). The main machining parameters such as machining polarity ( P ), peak current ( I p ), pulse duration ( τ p ), high-voltage auxiliary current ( I H ), no-load voltage ( V ) and servo reference voltage ( S v ) were chosen to determine the EDM machining characteristics such as material removal rate (MRR) and surface roughness (SR). The benefits of Magnetic Force assisted EDM were confirmed from the analysis of discharge waveforms and from the micrograph observation of surface integrity. The experimental results show that the Magnetic Force assisted EDM has a higher MRR, a lower relative electrode wear ratio (REWR), and a smaller SR as compared with standard EDM. In addition, the significant machining parameters, and the optimal combination levels of machining parameters associated with MRR as well as SR were also drawn. Moreover, the contribution for expelling machining debris using the Magnetic Force assisted EDM would be proven to attain a high efficiency and high quality of surface integrity to meet the demand of modern industrial applications.
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machining characteristics of Magnetic Force assisted edm
International Journal of Machine Tools & Manufacture, 2008Co-Authors: Yancherng Lin, Hoshiun LeeAbstract:The gap conditions of electrical discharge machining (EDM) would significantly affect the stability of machining progress. Thus, the machining performance would be improved by expelling debris from the machining gap fast and easily. In this investigation, Magnetic Force was added to a conventional EDM machine to form a novel process of Magnetic Force-assisted EDM. The beneficial effects of this process were evaluated. The main machining parameters such as peak current and pulse duration were chosen to determine the effects on the machining characteristics in terms of material removal rate (MRR), electrode wear rate (EWR), and surface roughness. The surface integrity was also explored by a scanning electron microscope (SEM) to evaluate the effects of the Magnetic Force-assisted EDM. As the experimental results suggested that the Magnetic Force-assisted EDM facilitated the process stability. Moreover, a pertinent EDM process with high efficiency and high quality of machined surface could be accomplished to satisfy modern industrial applications.
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Optimization of machining parameters using Magnetic-Force-assisted EDM based on gray relational analysis
The International Journal of Advanced Manufacturing Technology, 2008Co-Authors: Yancherng Lin, Hoshiun LeeAbstract:This work developed a novel process of Magnetic-Force-assisted electrical discharge machining (EDM) and conducted an experimental investigation to optimize the machining parameters associated with multiple performance characteristics using gray relational analysis. The main machining parameters such as machining polarity ( P ), peak current ( I _P), pulse duration ( τ _P), high-voltage auxiliary current ( I _H), no-load voltage ( V ), and servo reference voltage ( S _V) were selected to explore the effects of multiple performance characteristics on the material removal rate, electrode wear rate, and surface roughness. The experiments were conducted according to an orthogonal array L18 based on Taguchi method, and the significant process parameters that affected the multiple performance characteristics of Magnetic-Force-assisted EDM were also determined form the analysis of variance. Moreover, the optimal combination levels of machining parameters were also determined from the response graph and then verified experimentally. The multiple performance characteristics of the Magnetic-Force-assisted EDM were improved, and the EDM technique with high efficiency, high precision, and high-quality surface were established to meet the demand of modern industrial applications.
Yancherng Lin - One of the best experts on this subject based on the ideXlab platform.
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optimization of machining parameters in Magnetic Force assisted edm based on taguchi method
Journal of Materials Processing Technology, 2009Co-Authors: Yancherng Lin, Yuanfeng Chen, Deran Wang, Hoshiun LeeAbstract:Abstract A versatile process of electrical discharge machining (EDM) using Magnetic Force assisted standard EDM machine has been developed. The effects of Magnetic Force on EDM machining characteristics were explored. Moreover, this work adopted an L18 orthogonal array based on Taguchi method to conduct a series of experiments, and statistically evaluated the experimental data by analysis of variance (ANOVA). The main machining parameters such as machining polarity ( P ), peak current ( I p ), pulse duration ( τ p ), high-voltage auxiliary current ( I H ), no-load voltage ( V ) and servo reference voltage ( S v ) were chosen to determine the EDM machining characteristics such as material removal rate (MRR) and surface roughness (SR). The benefits of Magnetic Force assisted EDM were confirmed from the analysis of discharge waveforms and from the micrograph observation of surface integrity. The experimental results show that the Magnetic Force assisted EDM has a higher MRR, a lower relative electrode wear ratio (REWR), and a smaller SR as compared with standard EDM. In addition, the significant machining parameters, and the optimal combination levels of machining parameters associated with MRR as well as SR were also drawn. Moreover, the contribution for expelling machining debris using the Magnetic Force assisted EDM would be proven to attain a high efficiency and high quality of surface integrity to meet the demand of modern industrial applications.
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machining characteristics of Magnetic Force assisted edm
International Journal of Machine Tools & Manufacture, 2008Co-Authors: Yancherng Lin, Hoshiun LeeAbstract:The gap conditions of electrical discharge machining (EDM) would significantly affect the stability of machining progress. Thus, the machining performance would be improved by expelling debris from the machining gap fast and easily. In this investigation, Magnetic Force was added to a conventional EDM machine to form a novel process of Magnetic Force-assisted EDM. The beneficial effects of this process were evaluated. The main machining parameters such as peak current and pulse duration were chosen to determine the effects on the machining characteristics in terms of material removal rate (MRR), electrode wear rate (EWR), and surface roughness. The surface integrity was also explored by a scanning electron microscope (SEM) to evaluate the effects of the Magnetic Force-assisted EDM. As the experimental results suggested that the Magnetic Force-assisted EDM facilitated the process stability. Moreover, a pertinent EDM process with high efficiency and high quality of machined surface could be accomplished to satisfy modern industrial applications.
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Optimization of machining parameters using Magnetic-Force-assisted EDM based on gray relational analysis
The International Journal of Advanced Manufacturing Technology, 2008Co-Authors: Yancherng Lin, Hoshiun LeeAbstract:This work developed a novel process of Magnetic-Force-assisted electrical discharge machining (EDM) and conducted an experimental investigation to optimize the machining parameters associated with multiple performance characteristics using gray relational analysis. The main machining parameters such as machining polarity ( P ), peak current ( I _P), pulse duration ( τ _P), high-voltage auxiliary current ( I _H), no-load voltage ( V ), and servo reference voltage ( S _V) were selected to explore the effects of multiple performance characteristics on the material removal rate, electrode wear rate, and surface roughness. The experiments were conducted according to an orthogonal array L18 based on Taguchi method, and the significant process parameters that affected the multiple performance characteristics of Magnetic-Force-assisted EDM were also determined form the analysis of variance. Moreover, the optimal combination levels of machining parameters were also determined from the response graph and then verified experimentally. The multiple performance characteristics of the Magnetic-Force-assisted EDM were improved, and the EDM technique with high efficiency, high precision, and high-quality surface were established to meet the demand of modern industrial applications.
J C Lodder - One of the best experts on this subject based on the ideXlab platform.
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high resolution Magnetic Force microscopy using focused ion beam modified tips
Applied Physics Letters, 2002Co-Authors: G N Phillips, Leon Abelmann, Martin Herman Siekman, J C LodderAbstract:Atomic Force microscope tips coated by the thermal evaporation of a Magnetic 30 nm thick Co film have been modified by focused ion beam milling with Ga+ ions to produce tips suitable for Magnetic Force microscopy. Such tips possess a planar Magnetic element with high Magnetic shape anisotropy, an extremely high aspect ratio of greater than 30:1, and an end radius of less than 25 nm. These tips have been used in a commercial atomic Force microscope under ambient conditions to obtain 30 nm resolution Magnetic images of an established CoNi/Pt multilayer reference sample.
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quantitative Magnetic Force microscopy on perpendicularly magnetized samples
Journal of Applied Physics, 1998Co-Authors: H J Hug, B. Stiefel, S. Martin, H.-j. Güntherodt, S Porthun, Leon Abelmann, P J A Van Schendel, A Moser, R Hofer, J C LodderAbstract:We present a transfer-function approach to calculate the Force on a Magnetic Force microscope tip and the stray field due to a perpendicularly magnetized medium having an arbitrary magnetization pattern. Under certain conditions, it is possible to calculate the magnetization pattern from the measured Force data. We apply this transfer function theory to quantitatively simulate Magnetic Force microscopy data acquired on a CoNi/Pt multilayer and on an epitaxially grown Cu/Ni/Cu/Si(001) Magnetic thin film. The method described here serves as an excellent basis for (i) the definition of the condition for achieving maximum resolution in a specific experiment, (ii) the differences of Force and Force z-derivative imaging, (iii) the artificial distinction between domain and domain wall contrast, and finally (iv) the influence of various tip shapes on image content.
Leon Abelmann - One of the best experts on this subject based on the ideXlab platform.
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high resolution Magnetic Force microscopy using focused ion beam modified tips
Applied Physics Letters, 2002Co-Authors: G N Phillips, Leon Abelmann, Martin Herman Siekman, J C LodderAbstract:Atomic Force microscope tips coated by the thermal evaporation of a Magnetic 30 nm thick Co film have been modified by focused ion beam milling with Ga+ ions to produce tips suitable for Magnetic Force microscopy. Such tips possess a planar Magnetic element with high Magnetic shape anisotropy, an extremely high aspect ratio of greater than 30:1, and an end radius of less than 25 nm. These tips have been used in a commercial atomic Force microscope under ambient conditions to obtain 30 nm resolution Magnetic images of an established CoNi/Pt multilayer reference sample.
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quantitative Magnetic Force microscopy on perpendicularly magnetized samples
Journal of Applied Physics, 1998Co-Authors: H J Hug, B. Stiefel, S. Martin, H.-j. Güntherodt, S Porthun, Leon Abelmann, P J A Van Schendel, A Moser, R Hofer, J C LodderAbstract:We present a transfer-function approach to calculate the Force on a Magnetic Force microscope tip and the stray field due to a perpendicularly magnetized medium having an arbitrary magnetization pattern. Under certain conditions, it is possible to calculate the magnetization pattern from the measured Force data. We apply this transfer function theory to quantitatively simulate Magnetic Force microscopy data acquired on a CoNi/Pt multilayer and on an epitaxially grown Cu/Ni/Cu/Si(001) Magnetic thin film. The method described here serves as an excellent basis for (i) the definition of the condition for achieving maximum resolution in a specific experiment, (ii) the differences of Force and Force z-derivative imaging, (iii) the artificial distinction between domain and domain wall contrast, and finally (iv) the influence of various tip shapes on image content.
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Magnetic Force microscopy of thin film media for high density Magnetic recording
Journal of Magnetism and Magnetic Materials, 1998Co-Authors: S Porthun, Leon Abelmann, Cock LodderAbstract:This paper discusses various aspect of Magnetic Force microscopy (MFM) for use in the field of high density Magnetic recording. After an introduction of the most important Magnetic imaging techniques, an overview is given of the operation and theory of MFM. The developments in instrumentation, MFM tips, quantification of MFM data, high resolution imaging and application of external fields is discussed. Examples are given of the applications of MFM, such as the characterization of heads, Magnetic structures (bits) in longitudinal and perpendicular recording media, bits in magneto-optic films and domain structures in soft Magnetic materials.
Bharat B Pant - One of the best experts on this subject based on the ideXlab platform.
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high frequency Magnetic Force microscopy characterization of Magnetic recording writer poles
Journal of Applied Physics, 2005Co-Authors: Alexey V Nazarov, M L Plumer, Bharat B PantAbstract:Measurements of longitudinal writer poles at the air bearing surface were performed using high-resolution Magnetic-Force microscopy (MFM) with low coercivity tips. Two-dimensional MFM maps were obtained for various write currents. The modeling results indicate that the MFM maps are related more to the field than to its second derivative. Two techniques were used, dc MFM and high-frequency (HF) MFM. The results show that the HF-MFM technique can distinguish between different writer designs. The writers with the best high-frequency performance showed gradual decrease of the maximum MFM signal with frequency up to 1.5GHz.
