Study on a New Internal Finishing Process by the Application of Magnetic Abrasive Machining. 2nd Report, Effects of Magnetic Field Distribution on Magnetic Force Acting on Magnetic Abrasives.

Recently carbon nanotubes (CNTs) are reported to be able to generate large magnetic field because of their nanometer-size-diameter[2]. The magnetic fields around CNTs current path are investigated by magnetic force microscopy (MFM). Under the consideration of the magnetic properties of magnetically coated tip of MFM, tip heights, current directions, and background magnetic field, etc., the magnetic field distribution are analyzed. The distribution of the magnetic field generated by the CNTs current is found to be asymmetric, and its distribution anomaly is found to be a kind of hysteresis effect of the MFM cantilever materials.

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Mechanism of a Magnetic Field Assisted Finishing Process Using a Magnet Tool and Magnetic Particles

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.339.106 ◽

2007 ◽

Vol 339 ◽

pp. 106-113 ◽

Cited By ~ 4

Author(s):

Yan Hua Zou ◽

Takeo Shinmura

Keyword(s):

Magnetic Field ◽

Magnetic Particles ◽

Magnetic Force ◽

Magnetic Particle ◽

Machining Process ◽

Finishing Process ◽

Magnet Surface ◽

Magnetic Abrasives ◽

Quality Surface ◽

Process Method

This paper describes a new efficient internal finishing process for a thick tubing (10~30mm in thickness), by the application of a magnetic field-assisted machining process using a magnet tool. Because a stronger magnetic force can be generated than conventional magnetic abrasives, it makes the internal finishing of thick non-ferromagnetic tubing possible. Moreover, in order to obtain a high-quality surface, this process method was developed using magnetic particles magnetically attracted on the magnet surface. This paper characterizes the processing principle and advantages of this process. Then, the mechanism of this finishing process was examined by a plane model experiment. It was clarified that the magnetism and shape of a magnetic particle influence realization possibility of this processing method, and it also influence the finishing characteristics.

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Study and Modeling of the Magnetic Field Distribution in the Fricker Hydrocyclone Cylindrical Part

Computation ◽

10.3390/computation8020042 ◽

2020 ◽

Vol 8 (2) ◽

pp. 42 ◽

Cited By ~ 1

Author(s):

Boris Avdeev ◽

Roman Dema ◽

Sergei Chernyi

Keyword(s):

Magnetic Field ◽

Field Strength ◽

Magnetic Field Strength ◽

Field Distribution ◽

Magnetic Force ◽

Cylindrical Part ◽

Magnetic Field Distribution ◽

Radial Magnetic Field ◽

Working Chamber ◽

The Magnetic Field

The magnetic field distribution along the radius and height in the working chamber of a hydrocyclone with a radial magnetic field is studied. One of the most important parameters of magnetic hydrocyclones is the magnetic field distribution along the radius and height of the working chamber. It is necessary for calculating the coagulation forces and the magnetic force affecting the particle or flocculus. The magnetic field strength was calculated through magnetic induction, measured by a teslameter at equal intervals and at different values of the supply DC current. The obtained values for the magnetic field strength are presented in the form of graphs. The field distribution curves produced from the dependences found earlier were constructed. The correlation coefficients were calculated. It was proven that the analyzed dependences could be used in further calculations of coagulation forces and magnetic force, because theoretical and experimental data compared favourably with each other. The distribution along the radius and height in the cylindrical part of the magnetic hydrocyclone was consistent with data published in the scientific literature.

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Magnetic force enhancement in a linear actuator by air-gap magnetic field distribution optimization and design

Finite Elements in Analysis and Design ◽

10.1016/j.finel.2012.04.007 ◽

2012 ◽

Vol 58 ◽

pp. 44-52 ◽

Cited By ~ 23

Author(s):

Jaewook Lee ◽

Ercan M. Dede ◽

Debasish Banerjee ◽

Hideo Iizuka

Keyword(s):

Magnetic Field ◽

Field Distribution ◽

Magnetic Force ◽

Air Gap ◽

Magnetic Field Distribution ◽

Linear Actuator ◽

Force Enhancement ◽

Air Gap Magnetic Field

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Magnetic Force Enhancement Using Air-Gap Magnetic Field Manipulation by Optimized Coil Currents

Applied Sciences ◽

10.3390/app10010104 ◽

2019 ◽

Vol 10 (1) ◽

pp. 104 ◽

Cited By ~ 2

Author(s):

Jaejoon Lee ◽

Jaewook Lee

Keyword(s):

Magnetic Field ◽

Field Distribution ◽

Magnetic Force ◽

Air Gap ◽

Magnetic Field Distribution ◽

Force Enhancement ◽

Coil Current ◽

Design Variables ◽

Air Gap Magnetic Field ◽

The Magnetic Field

This paper presents an air-gap magnetic field manipulation by optimized coil currents for a magnetic force enhancement in electromechanical devices. The external coil is designed near the device air-gap for manipulating the magnetic field distribution. The distribution of external coil currents is then optimized for maximizing the magnetic force in the tangential direction to the air-gap line. For the optimization, the design domain near air-gap is divided into small areas, and design variables are assigned at each small design area. The design variables determines not only the strength of coil current density (i.e., number of coil turns) but also whether the material state is coil or iron. In a benchmark actuator example, it is shown that 11.12% force enhancement is available by manipulating the air-gap magnetic field distribution using the optimized coil current. By investigating the magnetic field distribution, it is confirmed that the optimized coil current manipulated the magnetic field, forwarding a focused and inclined distribution that is an ideal distribution for maximizing the magnetic force.

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