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1
Content available remote Sposoby impregnacji narzędzi ściernych ze spoiwem ceramicznym z użyciem stałych środków smarnych
Wojtewicz M., Sienicki W., Nadolny K.
Mechanik
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2016
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R. 89, nr 8-9
1108--1109
PL
Przedstawiono sposoby modyfikacji narzędzi ściernych ze spoiwem ceramicznym przez wprowadzenie do ich objętości substancji smarnych w postaci grafitu i disiarczku molibdenu jako impregnatu. Zbadano możliwości kontroli ilości wprowadzonego impregnatu dla różnych typów ściernic.
EN
In the paper different kinds of vitrified grinding wheels modification methods in the process of treatment with solid lubricants (graphite and molybdenum disulphide) were presented. The possibilities of controlling the quantity of solid lubricant in the various kinds of grinding wheels were investigated.
2
Content available remote Analiza stanu czynnej powierzchni ściernic impregnowanych węglem amorficznym po procesie szlifowania stopu Titanium Grade 2® z użyciem mikroskopii elektronowej i spektroskopii rentgenowskiej (SEM-EDS)
Nadolny K., Sienicki W., Wojtewicz M., Rokosz K., Kapłonek W., Wienecke M., Heeg J.
Mechanik
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2016
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R. 89, nr 8-9
1106--1107
PL
Przedstawiono wybrane rezultaty analizy składu pierwiastkowego na czynnej powierzchni ściernic impregnowanych węglem amorficznym po procesie szlifowania stopu Titanium Grade 2®, wykonanej z zastosowaniem spektroskopii dyspersji energii promieniowania rentgenowskiego (SEM-EDS). Uzyskane wyniki wskazują na skuteczne wprowadzenie impregnatu bezpośrednio do strefy styku aktywnych wierzchołków skrawających z materiałem obrabianym.
EN
In the paper the selected results of analysis of the state of amorphous carbon treated grinding wheel active surface after grinding of Titanium Grade 2® using SEM-EDS technique were presented. The obtained results indicate the effective input of impregnating substance directly into the contact zone between abrasive grains and workpiece surface.
3
Content available remote Analiza stanu wiedzy i techniki w zakresie szlifowalności stopów na bazie niklu
Wojtewicz M., Nadolny K., Sienicki W.
Mechanik
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2015
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R. 88, nr 8-9CD1
330--339
PL
W artykule przedstawiono stan wiedzy i techniki w zakresie szlifowania superstopów niklu. Główny nacisk położono na zjawisko adhezji oraz na defekty szlifierskie jakie towarzyszą obróbce tego typu materiałów. Opisano również metody przeciwdziałania tym niepożądanym zjawiskom potwierdzone własnymi badaniami.
EN
This article describes the state of the art. In grindability of the sickle-based alloys. The main objective of this article is to describe two typical phenomena like adhesion wear and grinding defects in the process of grinding. The methods to counteract of this phenomena concurred with own research were also described.
4
Content available remote The effect upon the grinding wheel active surface condition when impregnating with non-metallic elements during internal cylindrical grinding of titanium
Nadolny K., Sienicki W., Wojtewicz M.
Archives of Civil and Mechanical Engineering
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2015
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Vol. 15, no. 1
71--86
EN
The following article describes the results of experimental works connected with the possibility of limiting the adhesion of grinding products to the grinding wheel active surface, as a result of introducing an impregnate, in the form of sulphur or allotropic carbon variants, into the grinding wheel volume. The methods of sulphurizing, as well as impregnation with graphite and amorphous carbon, were described. The results of experimental tests conducted in the internal cylindrical reciprocal grinding process in Titanium Grade 2® alloy, using impregnated grinding wheels, were presented and compared to the results of grinding with a non-impregnated grinding wheel. What was also determined was the influence of the type of impregnate on the grinding wheel active surface stereometric features after the grinding process, especially the degree to which smearing with machined material chips occurred. Moreover, the influence of impregnation on the machined surface roughness was also estimated. The results of the conducted experiments indicate that application of the impregnate, in the form of graphite, allowed for a 10-fold reduction in the number of smeared areas in comparison with the non-impregnated grinding wheel.
5
Content available remote An analysis of centrifugal MQL supply system potential in the internal cylindrical grinding process
Nadolny K., Wojtewicz M., Sienicki W., Herman D.
Archives of Civil and Mechanical Engineering
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2015
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Vol. 15, no. 3
639--649
EN
In the article the state of knowledge regarding the functions and supply methods of the cooling liquid into the grinding zone were presented. The new system for centrifugal supply of oil mist was described. The results of experimental investigations conducted into the internal cylindrical grinding process were given. The life of the wheel, machined surface roughness, grinding power and temperature in the machining zone were analyzed. Experimental results showed that compared to flood cooling, this new system provides double the lifespan of the wheel, significantly reducing the volume of wheel wear and enabling the slightly reduced roughness of machined surface and grinding power. Using a new coolant supply method caused an increase in the workpiece temperature, compared to the flood cooling.
6
Content available remote Wpływ impregnacji ściernicy pierwiastkami niemetalicznymi na intensywność zalepiania jej czynnej powierzchni
Nadolny K., Sienicki W., Wojtewicz M.
Mechanik
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2012
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R. 85, nr 8-9CD (NSOŚ)
55--70
7
Content available Chemically modified polymethyl methacrylate in a magnesium-polymer cell
Sienicki W., Wojtewicz M.
International Letters of Chemistry, Physics and Astronomy
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2012
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Vol. 4
76-81
EN
As a result of the electrophilic protonation of a carboxyl group of di electric polymethylmethacrylate (PMMA) with trifluoromethanesulfonic acid (CF3SO3H), a modified conducting polymer material was produced in the shape of a thin elastic lamina and a dense conductive gel, whose density was 1.26 g/cm3. These polymers conduct electricity, do not dissolve In either cold or warm water and are also resistant to weather conditions. Their conductivity in room temperature is 7.5ź10-3 Scm-1 and it greatly increases above 154 K. Activation energy Ea decreases with increasing temperature in the range 154 K - 300 K from 1.47 eV to 0.69 eV. The magnesiumpolymer (Mg-Poly) cell is constructed with magnesium as the anode and conductive PMMA as the cathode and both electrodes are electrically connected with a polymer gel electrolyte. The ratek voltage of this cell is 2.4 V.
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