Research on the Finishing Mechanism of Fluid Magnetic Abrasives

2010 ◽  
Vol 455 ◽  
pp. 211-215 ◽  
Author(s):  
H. Zhang ◽  
W.D. Li
Keyword(s):  
Rheological Property ◽  
Micro Structure ◽  
New Type ◽  
Precision Finishing ◽  
Magnetic Abrasives

The fluid magnetic abrasive (FMA) is a new type of precision finishing abrasives. The workpiece can be finished by fluid magnetic abrasive (FMA) because of its rheological property. On base of researching on the micro-structure of fluid magnetic abrasive (FMA), this paper analyzed the finishing mechanism. And the experiments and results are presented as well in this paper.

The Experiment Research on the Fluid Magnetic Abrasives

2012 ◽  
Vol 522 ◽  
pp. 3-7
Author(s):  
Wei Dong Li ◽  
Ming Lv
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Rheological Property ◽  
Strong Magnetic Field ◽  
Micro Structure ◽  
Experiment Research ◽  
Intelligent Material ◽  
New Type ◽  
Magnetic Abrasives

The fluid magnetic abrasive (FMA) is a new type of intelligent material. The fluid magnetic abrasive (FMA) has typical liquid characteristics, when there is no external magnetic field around it. But when a strong magnetic field is applied, the viscosity of it will increase more than 100 times within a few milliseconds, and it will show the characteristics those are resemble to solid's. We call this feature as rheological property, of which because the workpiece can be finished by fluid magnetic abrasive (FMA). On base of researching on the micro-structure of fluid magnetic abrasive (FMA), the experiments and results are presented in this paper.

Fluid Magnetic Abrasives Based on Micron-Sized Carbonyl-Iron Particles and Its Applications in the Precision Finishing Process

2007 ◽  
Author(s):  
Huanwu Sun ◽  
Shichun Yang
Keyword(s):  
Carbonyl Iron ◽  
Magnetic Particles ◽  
Iron Particles ◽  
Typical Size ◽  
Carrier Liquid ◽  
Finishing Process ◽  
New Type ◽  
Preparation Techniques ◽  
Precision Finishing ◽  
Magnetic Abrasives

The fluid magnetic abrasive (FMA) is a new type of precision finishing abrasives, which is typically prepared by dispersing the magnetic particles, nonmagnetic abrasives, surfactants in a non-magnetizable carrier liquid. As the functional particles, the characteristics of magnetic particles have a great impact on the properties of FMA. In our experiment, the micron-sized carbonyl-iron (CI) particles (typical size: 3 μm–5 μm) are found to be ideally suited for the preparation of FMA. In this paper, the selections of micron-sized carbonyl-iron particles suitable for the FMA, the preparation techniques, the finishing mechanism and finishing process are presented. Some key parameters of FMA that may affect the finishing efficiency and the final surface roughness are analyzed theoretically. The experimental results are discussed as well in this paper.

Study on the Rheological Effect Models of Fluid Magnetic Abrasive

2009 ◽  
Vol 416 ◽  
pp. 54-60
Author(s):  
Huan Wu Sun ◽  
Shi Chun Yang
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Surface Roughness ◽  
Experimental Results ◽  
Transition Phenomenon ◽  
New Type ◽  
Rheological Effect ◽  
First Time ◽  
Precision Finishing ◽  
Magnetic Abrasives

The fluid magnetic abrasives (FMA) are a new type of precision finishing abrasives which are developed on the basis of the phase transition phenomenon caused by magnetic field. The rheological effect of FMA is the basis to achieve its finishing function, and has a great impact on the finishing capabilities and the final surface roughness. In order to get a better understanding of FMA finishing mechanism, the rheological effect models of FMA are deduced for the first time, the simulations and the experimental results are discussed as well in this paper.

Improving the Sediment Stability of Fluid Magnetic Abrasives Based on Nanometer SiO2

2010 ◽  
Vol 135 ◽  
pp. 159-163
Author(s):  
Huan Wu Sun ◽  
Wei Yi Chen
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Surface Roughness ◽  
Preparation Method ◽  
Sediment Stability ◽  
New Type ◽  
The Stability ◽  
Nanometer Sio2 ◽  
Precision Finishing ◽  
Magnetic Abrasives

The fluid magnetic abrasives (FMA) are a new type of precision finishing abrasives which are developed on the basis of the phase transition phenomenon caused by magnetic field. The sediment stability and agglomerative stability are significant characteristics of FMA, and have a great impact on the finishing capabilities and the final surface roughness value. In order to improve the stability of FMA, a new ingredient based on nanometer SiO2 is proposed, the preparation method and the experimental results are also discussed in this paper.

Material Removal Model and Numerical Analysis of Fluid Magnetic Abrasives Finishing

2008 ◽  
Vol 392-394 ◽  
pp. 45-49
Author(s):  
Huan Wu Sun ◽  
Shi Chun Yang
Keyword(s):  
Surface Roughness ◽  
Material Removal ◽  
Complex Shape ◽  
Removal Rate ◽  
New Type ◽  
Material Removal Model ◽  
Removal Model ◽  
Precision Finishing ◽  
Magnetic Abrasives ◽  
Key Parameter

The fluid magnetic abrasives (FMA) are a new type of precision finishing abrasives, which can be used to finish the work-pieces with intricate or complex shape to a quite low surface roughness value. As a key parameter, the material removal rate has a great impact on the finishing capabilities and the final surface roughness. In order to get a better understand of FMA removal mechanism, the numerical analyses was used to simulate the shearing stress field and velocity distribution. The experimental results are discussed as well in this paper.

Macro Finite Element for Analysis of Textile Composites

1994 ◽  
Vol 28 (7) ◽  
pp. 607-618 ◽  
Author(s):  
John Whitcomb ◽  
Kyeongsik Woo ◽  
Sitaram Gundapaneni
Keyword(s):  
Finite Element ◽  
Finite Elements ◽  
Textile Composites ◽  
Single Element ◽  
Micro Structure ◽  
Macro Elements ◽  
New Type

The analysis of textile composites is complicated by the complex micro-structure. It is not practical to account for this microstructure directly using traditional finite elements. A new type of finite element was developed to efficiently account for microstructure within a single element. These new elements, which are referred to herein as macro elements, performed well in initial tests.

Study on the Magnetic Saturation Flux Density Measurement of Fluid Magnetic Abrasives

2007 ◽  
Vol 24-25 ◽  
pp. 273-278 ◽  
Author(s):  
Huan Wu Sun ◽  
Shi Chun Yang
Keyword(s):  
Flux Density ◽  
Density Measurement ◽  
Magnetic Flux Density ◽  
Magnetic Saturation ◽  
Finishing Process ◽  
Experimental Apparatus ◽  
New Apparatus ◽  
New Type ◽  
Flux Density Measurement ◽  
Magnetic Abrasives

The fluid magnetic abrasives (FMA) are a new type of precision finishing abrasives, which can be used to finish the parts with intricate or complex shape to a quite low surface roughness value. As a key parameter, the magnetic saturation flux density has a great impact on the design of finishing devices and the control of finishing process. In order to measure the magnetic flux density and determine the magnetization curve of FMA, a new apparatus has been developed. The measuring mechanism and the experimental apparatus are presented. The experimental results are discussed as well in this paper.

Study of CaCO3 Whiskers: Preparation and Applicability in Construction Materials

2011 ◽  
Vol 250-253 ◽  
pp. 649-656
Author(s):  
Jian Qiang Wei ◽  
Ming Li Cao
Keyword(s):  
Mechanical Properties ◽  
Fibrous Material ◽  
Construction Materials ◽  
Micro Structure ◽  
Preparation Methods ◽  
Artificial Bones ◽  
New Type

As a new type of fibrous material, CaCO3whisker has played an increasingly important role in the fields of instrumentation, polymerscience and artificial bones. In order to give full play to CaCO3whisker’s novel micro structure, excellent mechanical properties and stability, we initially applies it to advanced cement based construction materials. The preparation methods, characterization of CaCO3whisker and its applicability in advanced construction materials were studied thoroughly, based on the latest literatures and our newest research works.

Rheological Property of Sodium Alginate-Agar-Montmorillonite Ternary Solution

2014 ◽  
Vol 900 ◽  
pp. 357-360
Author(s):  
Nan Song Ma ◽  
Su Juan Pang ◽  
Nai Xu ◽  
Li Sha Pan ◽  
Guang Mao Li ◽  
...  
Keyword(s):  
Rheological Property ◽  
Rheological Properties ◽  
Sodium Alginate ◽  
Apparent Viscosity ◽  
Rotation Speed ◽  
Solution Temperature ◽  
Ternary Solution ◽  
Micro Structure ◽  
Rotational Viscometer

The rheological properties of sodium alginate (SA)/agar (AR)/montmorillonite (MMT) solutions were investigated using a rotational viscometer. The dependence of solution apparent viscosity on rotation speed, MMT proportion and solution temperature were researched systematically. Furthermore, the relation of apparent viscosity and micro-structure of the ternary solution was also discussed.

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