Modeling of electromagnet for application in nano-finishing of internal tubular surfaces using ferrofluid and rotating magnetic...

This paper presents data on the modeling of an electromagnet for the finishing equipment, which provides flexible and effective work. The modeling was performed by using Finite Element Method Magnetics (FEMM) software intended for solving 2D planar and axisymmetric problems in low frequency magnetics. The modeling data demonstrates the best shape, shape-and-size-ratio of electromagnet, which would ensure maximum efficiency when using the aforementioned device. An electromagnetic field generator, consisting of four electromagnets, was constructed. Subsequently it was determined that generated magnetic field was far smaller than in the mode

Modeling of electromagnet for application in nano-finishing of internal tubular surfaces using ferrofluid and rotating magnetic...

This paper presents data on the modeling of an electromagnet for the finishing equipment, which provides flexible and effective work. The modeling was performed by using Finite Element Method Magnetics (FEMM) software intended for solving 2D planar and axisymmetric problems in low frequency magnetics. The modeling data demonstrates the best shape, shape-and-size-ratio of electromagnet, which would ensure maximum efficiency when using the aforementioned device. An electromagnetic field generator, consisting of four electromagnets, was constructed. Subsequently it was determined that generated magnetic field was far smaller than in the mode

R&D of the device for blind to conceive 2D graphical information

Miniature piezoelectric thimble is described and investigated, based on friction control between PC screen and thimble’s contacting surface. The contours of the image on PC screen switch on and off harmonic or non-harmonic electric signals, connected to the electrodes of bimorph piezoelectric transducer, generating bending deformations, affecting friction coefficient. While scanning the PC screen in two directions, these periodic variations of friction coefficient result in oscillations of the fingertip, related to the color or intensity of the image components on the screen. Another three cases of pin’s oscillations normal to finger contacting surface are described

R&D of the device for blind to conceive 2D graphical information

Miniature piezoelectric thimble is described and investigated, based on friction control between PC screen and thimble’s contacting surface. The contours of the image on PC screen switch on and off harmonic or non-harmonic electric signals, connected to the electrodes of bimorph piezoelectric transducer, generating bending deformations, affecting friction coefficient. While scanning the PC screen in two directions, these periodic variations of friction coefficient result in oscillations of the fingertip, related to the color or intensity of the image components on the screen. Another three cases of pin’s oscillations normal to finger contacting surface are described

Tool edge geometry’ and wear’ recognition by using contact method

The aim of this paper is to present a device to measure non-destructively the geometry of cutting edges as well as to detect the wear. This might sound easy. One might propose a usual optical way where an edge is illuminated by an inclined beam and observed from the top. Another might try to use a surface roughness measurement device. However, those were all tested in the past and ended up with a total failure or severe limitation in application. The major reason consists in the size of roundness. For the case of a lancet or shaving knife the roundness is of the order of 2 – 5 µm and varies along the periphery covering over 300 degrees. This paper presents a non-destructive method, which consists of a mechanical device and software package for performing reading and mathematical calculations as well as obtaining practical knowledge on the relationship between the sharpness and performance of various sharp edges according to their purpose

Tool edge geometry’ and wear’ recognition by using contact method

The aim of this paper is to present a device to measure non-destructively the geometry of cutting edges as well as to detect the wear. This might sound easy. One might propose a usual optical way where an edge is illuminated by an inclined beam and observed from the top. Another might try to use a surface roughness measurement device. However, those were all tested in the past and ended up with a total failure or severe limitation in application. The major reason consists in the size of roundness. For the case of a lancet or shaving knife the roundness is of the order of 2 – 5 µm and varies along the periphery covering over 300 degrees. This paper presents a non-destructive method, which consists of a mechanical device and software package for performing reading and mathematical calculations as well as obtaining practical knowledge on the relationship between the sharpness and performance of various sharp edges according to their purpose