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1

SEM-based imaging and analysis of surface morphology of the Trizact™ advanced structured abrasives

Kapłonek W., Ungureanu M.

Journal of Mechanical and Energy Engineering

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2018

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Vol. 2, No 1

17--26

EN

This paper shows that imaging and analysis of morphological features of the surface of modern structured abrasives in the pre-machining state can be carried out by means of electron microscopy supported by image processing and analysis techniques. The acquisition of SEM micrographs for active surfaces of the four (A6, A30, A65, A160 grades) monolayer abrasive discs 237AA (3M) with Trizact™ abrasive grains was carried out by the use of Quanta 200 Mark II (FEI Company) high-resolution scanning electron microscope. Visual analysis allowed for the observation of abrasive grains mainly in terms of the occurrence on their surface of various defects resulting from the technology of their production. For a parametric analysis, the authors used the Fiji 1.51s software (J. Schindelin et al.) which, in turn, made it possible to determine the values of the basic geometrical parameters characterizing the abrasive grains in the selected area of the active surface of assessed abrasive tool. The observation and measurement instruments used in the experimental studies described in this work and the proposed methodology may present an interesting alternative approach to the assessment of the surface morphology of advanced structured abrasives.

2

Optical profilometer with confocal chromatic sensor for high-accuracy 3D measurements of the uncirculated and circulated coins

Kapłonek W., Sutowska M., Ungureanu M., Çetinkaya K.

Journal of Mechanical and Energy Engineering

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2018

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Vol. 2, No 3

181--192

EN

The term optical profilometry is used in relation to a group of methods used in a rapid, non-destructive, and non-contact assessment of surface topography. Those methods play a significant role in the area of a modern advanced laboratory and industrial 3D measurements. With the development of profilometric methods, a large progress in the construction of optical profilometric instruments and measuring sensors used in them, including confocal sensors based on the chromatic light aberration phenomenon (CLA) has been observed for several years. The paper shows that the Talysurf CLI 2000 multisensory optical profilometer equipped with a CLA sensor can be used in high-accuracy 3D measurements of the uncirculated and circulated coins. The assessment of such type objects characterized by a high variability of altitude can be extremely helpful in analyzing the actual metrological properties of measuring equipment used in their measurements.

3

Contributions regarding, the mining drilling tribo-system

Ungureanu N., Ungureanu M., Cotetiu R., Grozav S., Risteiu M.

Archives of Mining Sciences

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2011

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Vol. 56, no 3

527-535

EN

This paper presents part of a research on the tribological approach of the process of drilling of massive rock mechanics. The general concepts of tribo-systems are presented, then we proceed to customize them. So the following are presented: the tribo-system structure, drilling parameters, the mining tribo-system itself, its implementation in a material plan, and attempts to particularize for roto-percussive perforation.

PL

W artykule przedstawiono badania nad podejściem trybologicznym do procesu wiercenia w górotworze. Przedstawiono ogólne założenia systemu trybologicznego, następnie autorzy dokonują jego adaptacji do określonych warunków. Przedstawiono strukturę układu trybologicznego, parametry wiercenia, pełny system trybologiczny dla górnictwa oraz jego implementację a także procesu wiercenia przy użyciu wiertarek obrotowo- udarowych.