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  1. 12 Mechanik
  2. 4 Journal of Polish CIMAC
  3. 4 Stal, Metale & Nowe Technologie
  4. 3 Advances in Science and Technology. Research Journal
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  1. 6 Stachurski W.
  2. 5 Leppert T.
  3. 4 Rosik R.
  4. 3 Feldshtein Eugene
  5. 3 Leksycki Kamil
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1
Content available remote Obróbka wykończeniowa Inconelu 718 smarowana MQL z elektrycznie naładowanym dwusiarczkiem wolframu
Jemielniak Krzysztof
Mechanik
|
2023
|
R. 96, nr 4
28
PL
Przedstawiono wyniki frezowania czołowego Inconelu 718 z zastosowaniem nowo zaprojektowanego i wykonanego systemu dostarczania minimalnej ilości smaru (MQL) w postaci elektrycznie naładowanej zawiesiny nanocząstek dwusiarczku wolframu (WS2) w oleju roślinnym.
2
Content available Evaluation of the Surface Topography of Ti6Al4V Alloy after the Finish Turning Process under Ecological Conditions
Maruda Radosław W., Leksycki Kamil, Wojciechowski Szymon, Feldshtein Eugene, Łukaszewicz Andrzej
Advances in Science and Technology. Research Journal
|
2023
|
Vol. 17, no 2
63--70
EN
This paper describes findings in the surface topography of Ti6Al4V alloy after finish turning process under dry and MQL (minimum quantity lubrication) machining. The research was fulfilled in the range of variable feeds per revolution of 0.005-0.25 mm/rev and cutting speeds of 40-100 m/min using the depth of cut of 0.25 mm that fits finish processing conditions. The test plan was developed on the way to use the Parameter Space Investigation (PSI) method. The topography features were measured by a Sensofar S Neox optical profilometer using the Imaging Confocal Microscopy technique. Ra parameters and surface roughness profiles as well as 2D images and contour maps were analyzed. Under the studied machining conditions, lower Ra roughness parameters are obtained in the feed rate of 0.005-0.1 mm/rev and cutting speeds of 40-60 m/min. In comparison with dry machining, up to 17% reduction in Ra parameter values was obtained using the MQL method and vc = 70 m/min and f = 0.127 mm/rev as well as vc = 47.5 m/min and f = 0.22 mm/rev. Depending on the machining conditions, peaks and pits as well as feed marks typical for the turning process are observed on the machined surfaces.
3
Content available Analysis of Power Grid Parameters Depending on the Variable Concentration and Size of Copper Nanoparticles and Aerosol Formation Parameters in the Minimum Quantity Lubrication Method During Turning of Ti6Al4V Titanium Alloy
Szczotkarz Natalia, Maruda Radosław, Leksycki Kamil, Feldshtein Eugene, Wojciechowski Szymon, Jurczak Paweł, Waligóra Michał
Advances in Science and Technology. Research Journal
|
2023
|
Vol. 17, no 6
315--324
EN
Titanium alloys belong to the group of difficult-to-cut materials, machining of which leads to a number of challenges including large thermal loads on the cutting inserts and difficulties in obtaining a high quality machined surface. Great cutting forces, in turn, result in increased energy consumption. Therefore, it becomes important to attempt to reduce the amount of power consumed during machining, which can be achieved, among other things, by reducing the value of the coefficient of friction in the cutting zone. This paper presents a study on the influence of the size as well as the Cu nanoparticle concentration added to cutting fluid in MQL method on the power grid parameters while turning of Ti6Al4V titanium alloy. In this research, nanoparticles of 22 nm and 65 nm at concentrations of 0.5 wt% and 0.75 wt% were used. Turning process was carried out with constant cutting parameters and variable aerosol formation parameters, i.e. mass flow rate of nanofluid and volumetric flow rate of air. Based on the study, the use of 22 nm nanoparticles at 0.5 wt% concentration is recommended to achieve the smallest monitored values of the power grid parameters. The statistical analysis revealed that, out of the aerosol formation parameters considered, both the air flow rate and nanofluid flow rate do not significantly affect the values of the analysed power network parameters. However, the most significant factor is the variable nanoparticle size.
4
Content available Influence of Minimum Quantity Lubrication Using Vegetable-Based Cutting Fluids on Surface Topography and Cutting Forces in Finish Turning of Ti-6Al-4V
Lisowicz Joanna, Habrat Witold, Krupa Krzysztof
Advances in Science and Technology. Research Journal
|
2022
|
Vol. 16, no 1
95--103
EN
Titanium alloys are included in the group of difficult-to-cut materials. The use of different methods to reduce the temperature of the machining zone is one of the factors influencing the performance of the machining. The most commonly used method is flood cooling. On the basis of recent research, the conventionally used cutting fluids can cause some health problems for machine operators. Moreover, it was found that they can cause some problems for the environment during storage and disposal. Therefore, in recent years, the aspects of the use of biodegradable fluids and the reduction of the number of metalworking fluids used in machining processes have received much more attention. In this study, the effect of the application of three different vegetable oil-based cutting fluids was evaluated for minimum quantity lubrication (MQL) in finishing the Ti-6Al-4V titanium alloy on surface topography and cutting force components. The same tests were conducted for dry cutting conditions and the results were compared with those after machining with MQL. It was found that the best surface roughness was obtained with the use of the mixture of 50% vegetable oil and 50% diester (1PR20) under all the cutting parameters considered. The biggest differences in the values of the Sa and Sz parameters can be noticed for the lowest feed rate. For the feed rate f = 0.1 mm/rev, the Sa parameter values were approximately 32% and 24% lower for MQL with 1PR20 compared to MQL to LB2000 and dry cutting conditions, respectively. In terms of cutting force components, the lowest values were obtained for the MQL with 1PR20 machining. The values of the main cutting force were about 15% lower compared to the MQL with LB2000 cutting conditions for all the cutting parameters considered.
5
Content available remote Smarowanie MQL w obróbce skrawaniem aluminiowych materiałów kompozytowych
Karolczak Paweł
Stal, Metale & Nowe Technologie
|
2021
|
nr 11-12
23--37
PL
Materiały stosowane w budowie środków transportu, a szczególnie w lotnictwie, muszą wykazywać się zwiększonymi właściwościami, głównie wytrzymałościowymi, w stosunku do materiałów stosowanych w produkcji innych części maszyn. Współczynniki bezpieczeństwa w przypadku takich urządzeń są bardzo wyśrubowane.
EN
Materials used in the construction of means of transport, and especially in aviation, must offer increased properties, mainly strength, in relation to materials used in the manufacture of other parts of machinery. The safety factors for such devices are very high.
6
Content available remote Nowe osiągnięcia w technikach chłodzenia przy obróbce superstopów
Jemielniak Krzysztof
Mechanik
|
2021
|
R. 94, nr 7
6--16
EN
The paper presents an update of the recent literature on advances in cooling techniques for machining of difficult to machine materials such as nickel and titanium-based alloys used in aero-engine and aerostructure applications. The review covers: cryogenic machining, minimum quantity lubrication, the combination of MQL and cryogenic cooling, and high-pressure lubricoolant supply. Examples of applications in industrial processes are also given.
PL
W artykule przedstawiono najnowsze osiągnięcia w technikach chłodzenia przy obróbce materiałów trudnoobialnych, takich jak stopy niklu i stopy tytanu, stosowanych w silnikach i konstrukcjach lotniczych. Przegląd obejmuje: chłodzenie kriogeniczne i minimalne, połączenie tych technik, czyli kriogeniczne chłodzenie minimalne, oraz chłodzenie pod wysokim ciśnieniem. Przedstawiono również przykłady zastosowań przemysłowych.
7
Content available remote Hybrydowe procesy skrawania wspomagane nanocieczami. Część 2: Przykłady wpływu nanocieczy na proces skrawania
Grzesik Wit
Mechanik
|
2021
|
R. 94, nr 3
7--11
EN
The comprehensive knowledge of the applications of nano-fluids for hybrid machining processes assisted by liquid media, which, in general, are applied in MQL systems is presented. In the first part of the article properties of nano-additives, which are added to base cutting fluids (such as vegetable and mineral oils and emulsion), and their influence on the performance of machining processes were outlined. The tribological mechanisms including rolling and plowing of the nano-particles in the contact zones, as well as resulting thermal influences were characterized. In the second part of the article, some practical examples of the possible influences of different nano-fluids on the cutting temperature, tool wear and tool life, surface roughness and surface quality are provided and discussed. It was concluded that nano-fluids with graphene and carbon nanotubes additives are very effective in improving process behaviour.
PL
Przedstawiono zwięzłe informacje na temat zastosowania nanocieczy do wspomagania hybrydowych procesów skrawania mediami ciekłymi, które zasadniczo znalazły zastosowanie w minimalnym smarowaniu/chłodzeniu MQL. W pierwszej części artykułu omówiono właściwości dodawanych do cieczy bazowych (olejów roślinnych i mineralnych oraz emulsji) nanocząstek i ich wpływ na przebieg procesu skrawania. Scharakteryzowano mechanizmy tribologiczne w strefie kontaktu i pochodne oddziaływania termiczne. W drugiej części artykułu zostaną opisane praktyczne przykłady wpływu nanocieczy na temperaturę skrawania, przebieg zużycia i trwałość ostrza oraz chropowatość i jakość powierzchni. Wykazano dużą efektywność zastosowania nanocieczy z dodatkami grafenu i nanorurek.
8
Content available remote Hybrydowe procesy skrawania wspomagane nanocieczami. Część 1: Właściwości i mechanizmy oddziaływania nanocieczy
Grzesik Wit
Mechanik
|
2021
|
R. 94, nr 2
6--9
EN
The comprehensive knowledge of the applications of nanofluids for hybrid machining processes assisted by liquid media, which, in general, are applied in MQL systems is presented. In the first part of the article properties of nano-additives, which are added to base cutting fluids (such as vegetable and mineral oils and emulsion), and their influence on the performance of machining processes are outlined. The tribological mechanisms including rolling and plowing of the nano-particles in the contact zones, as well as resulting thermal influences are characterized. In the second part of the article, some practical examples of the possible influences of different nano-fluids on the cutting temperature, tool wear and tool life, surface roughness and surface quality will be provided and discussed. It was concluded that nano-fluids with graphene and carbon nanotubes additives are very effective in improving process behaviour.
PL
Przedstawiono zwięzłe informacje na temat zastosowania nanocieczy do wspomagania hybrydowych procesów skrawania mediami ciekłymi, które zasadniczo znalazły zastosowanie w minimalnym smarowaniu/chłodzeniu MQL. W pierwszej części artykułu omówiono właściwości dodawanych do cieczy bazowych (olejów roślinnych i mineralnych oraz emulsji) nanocząstek i ich wpływ na przebieg procesu skrawania. Scharakteryzowano mechanizmy tribologiczne w strefie kontaktu i pochodne oddziaływania termiczne. W drugiej części artykułu zostaną opisane praktyczne przykłady wpływu nanocieczy na temperaturę skrawania, przebieg zużycia i trwałość ostrza oraz chropowatość i jakość powierzchni. Wykazano dużą efektywność zastosowania nanocieczy z dodatkami grafenu i nanorurek.
9
Content available remote Symulacja numeryczna przepływu czynników chłodząco-smarujących w strefie szlifowania
Kieraś Seweryn, Nadolny Krzysztof
Stal, Metale & Nowe Technologie
|
2020
|
nr 9-10
42--50
PL
W artykule przedstawiono krótko wybrane proekologiczne metody chłodzenia i smarowania strefy szlifowania (metodę zminimalizowanego smarowania MQL oraz chłodzenie strumieniem schłodzonego sprężonego powietrza). Opisano istotę hybrydowej metody chłodzenia i smarowania strefy szlifowania otworów, integrującej odśrodkowe podawanie aerozolu powietrzno-olejowego (MQL) przy jednoczesnym podawaniu schłodzonego sprężonego powietrza (SSP).
EN
The article presents briefly selected pro-ecological methods of cooling and lubrication of the grinding zone (minimum quantity lubrication and cooling with a stream of cooled compressed air). The essence of the hybrid method of cooling and lubrication of the grinding zone of internal cylindrical grinding process has been described, which integrates the centrifugal supply of air-oil aerosol (MQL) with a simultaneous supply of cooled compressed air. A numerical simulation model has been characterized. It was used to carry out simulation studies on the flow of cooling and lubricating agents in the grinding zone for conditions corresponding to the assumptions of the proposed hybrid method. The final part of the article presents the results of simulation tests and specifies the most favourable conditions for the application of the hybrid method of cooling and lubricating the grinding zone.
10
Content available remote Możliwości zwiększenia efektywności metod chłodzenia i smarowania strefy obróbki w procesach szlifowania otworów
Nadolny Krzysztof
Stal, Metale & Nowe Technologie
|
2019
|
nr 11-12
69--74
PL
W artykule przedstawiono krótko funkcje mediów chłodząco-smarujących w procesach szlifowania. Opisano najistotniejsze ograniczenia w skutecznym chłodzeniu i smarowaniu strefy obróbki w procesie szlifowania walcowych powierzchni wewnętrznych (głównie otworów). Na podstawie zdefiniowanych ograniczeń scharakteryzowano wybrane innowacyjne metody zapewniające zwiększenie efektywności chłodzenia i smarowania strefy szlifowania i w efekcie umożliwiające ograniczenie ich użycia przy jednoczesnym wydłużeniu okresu trwałości narzędzi.
EN
The article briefly presents the functions of cooling lubricants in grinding processes. The most important limitations of the effective cooling and lubrication of the machining zone in the internal cylindrical grinding process are described. On the basis of the defined limitations, selected innovative methods of increasing the efficiency of the cooling and lubrication of the grinding zone are characterized. These methods enable reducing the use of coolants and at the same time extending the life of tools.
11
Content available On the analysis of chip shaping after finishing turning of Ti6Al4V titanium alloy under dry, wet and MQL conditions
Leksycki Kamil, Feldshtein Eugene
Archives of Mechanical Technology and Materials
|
2019
|
Vol. 39
36--40
EN
The shape and type of chip give general information about the cutting process. This paper presents the results of testing the shape and type of chips of Ti6Al4V titanium alloy after it finishes turning. The process was carried out under dry, wet and MQL (Minimum Quantity Lubrication) conditions at variable cutting speeds and feed rates and a constant depth of cutting. For planning the tests, the PSI (Parameter Space Investigation) method was used, which allows the experiment to be carried out while minimizing the number of experience points. It was found that the cutting speed and feed affect the type and shape of the chip, and clear differences were observed between dry and wet cooling conditions, and MQL conditions. During turning, the intensity of the cutting speed and feed influence on the chip compression ratio was changed. It was similar for dry and wet cooling conditions but smaller for MQL conditions. The purpose of this research is to analyze the chip shaping when Ti6Al4V titanium alloy finishes turning under dry, wet and MQL cooling conditions.
12
Content available Methods of minimalization of coolant flow rate in the grinding processes - the review
Czapiewski W.
Journal of Mechanical and Energy Engineering
|
2017
|
Vol. 1, No 2
117--122
EN
The article describes the role and types of cooling lubricants used in grinding processes. Conventional methods of coolants delivery into the grinding zone were described, such as: flood method, high-pressure jet method, centrifugal coolant provision method as well as methods method to minimize coolant flow rate: minimum quantity lubrication (MQL), minimum quantity cooling (MQC) and minimum quantity cooling lubrication (MQCL). Against this background, a methods were presented to completely eliminate grinding fluid from the grinding process (dry grinding) like: impregnated grinding wheels and cold air guns (CAG).
13
Content available Influence of supplying the vegetable oil with minimal quantity lubrication on wear of the hob during hobbing process of the gears
Stachurski W.
Journal of Mechanical and Energy Engineering
|
2017
|
Vol. 1, No 1
31--35
EN
In the paper, the experimental investigations on hobbing cutting of the gears with the use of cooling fluids with minimal quantity lubrication (MQL) has been presented. The experiments were prepared during milling of 42CrMo4 alloy steel at of 32 ± 2 HRC hardness using high speed steel HS6-5-2 hobs without coating. Gears have been generated made in one single pass, to the full depth of the cut. As a cooling fluid in the MQL method, the vegetable oil and synthetic mineral oil MICRO 3000 was used. During the experiment, the size of the clamping was measured on the worm blade application surface, thus determining the direct VBC wear indicator and the FC cutting force value was recorded. Based on the obtained results, the influence of the type of used oil with MQL on the wear of the tool was assessed. The carried out analysis revealed that the use of vegetable oil in the field of assessed conditions gave better results than dry milling.
14
Content available Application of PIV method to study the speed distribution of oil mist particles in the orthogonal cutting process
Wójcik R., Stachurski W.
Journal of Mechanical and Energy Engineering
|
2017
|
Vol. 1, No 1
51--55
EN
The paper presents the use of the PIV method in experimental studies on the speed distribution of oil particles contained in oil mist delivered into a cutting zone with minimum quantity (MQL). During investigations an orthogonal sample was of an aluminum alloy PA7N was machined using HS18-0-1 high-speed steel cutter. The oil mist was delivered into the cutting zone by a single spray nozzle directed at the tool rake surface. Two angular settings of the spray nozzle were applied in relation to the surface of the machined sample. Based on the images obtained by the PIV method, the distribution of the oil particles in the cutting area was determined according to the setting the spray nozzle. Studies have indicated more favorable conditions for the delivery of oil mist at the angle of spray nozzle at 85°. These conclusions were confirmed by measuring the cutting force in tangential direction to the machined surface.
15
Content available remote Wysoko wydajna obróbka stopów aluminium z wykorzystaniem chłodzenia MQL
Mrugalski R., Osiak P.
Mechanik
|
2016
|
R. 89, nr 10
1380--1381
PL
Przedstawiono wybrane aspekty dotyczące wielkoseryjnej obróbki głowicy silnika spalinowego z wykorzystaniem chłodzenia mgłą olejową MQL. Omówiono wytyczne projektowania narzędzi i oprawek narzędziowych w odniesieniu do zastosowanego systemu chłodzenia i smarowania oraz właściwości materiału obrabianego. Omówiono wyniki uzyskiwane dla wybranych rodzajów obróbki na bazie doświadczeń produkcyjnych zakładu Volkswagen Motor Polska w Polkowicach.
EN
The paper describes aspects occur during mass production of cylinder head of diesel engine with oil mist cooling (MQL). It demonstrate special tool and tool’s chucks design in reference to used coolant system as well as machining material. The paper describes results of selected types of machining based on experience from VWMP plant in Polkowice.
16
Content available remote Wpływ warunków chłodzenia na chropowatość powierzchni po frezowaniu
Leppert T., Paczkowski T., Polasik R.
Mechanik
|
2016
|
R. 89, nr 10
1420--1421
PL
W artykule przedstawiono badania porównawcze chropowatości powierzchni po frezowaniu – na sucho, z MQL i emulsją – stali węglowej C45 i stopu aluminium PA4, w zakresie wysokich prędkości skrawania.
EN
The article presents a comparative study of surface roughness after dry milling, with the MQL and emulsion of C45 carbon steel and aluminum alloy PA4 at high cutting speeds.
17
Content available remote Smarowanie strefy szlifowania za pomocą metody MQL wspomagane sprężonym schłodzonym powietrzem jako alternatywa dla metody zalewowej
Świerczyński J.
Mechanik
|
2016
|
R. 89, nr 10
1360-1361
PL
W niniejszym artykule przedstawiona została nowa metoda chłodząco-smarująca strefę szlifowania jako alternatywa dla tradycyjnie używanej metody zalewowej. Przedstawiono porównanie topografii powierzchni uzyskanej po obróbce z hybrydową metodą smarowania strefy szlifowania (MQL + SSP) z topografią powierzchni uzyskanej po smarowaniu tradycyjną metodą zalewową.
EN
In this article presented is a new method of cooling and lubricating the grinding zone as an alternative to the traditionally used flood method. It presents a comparison of surface topography obtained after treatment with the hybrid method of lubrication grinding zone (MQL + SSP) to the surface topography obtained after lubrication by traditional flood method.
18
Content available remote Obróbka stopu miedzi CuZn40Pb2 w warunkach minimalnego smarowania
Karolczak P., Waszczuk K.
Mechanik
|
2016
|
R. 89, nr 8-9
1062--1063
PL
Zaprezentowano wyniki badań toczenia stopu miedzi o oznaczeniu CuZn40Pb2 z wykorzystaniem minimalnego smarowania. Ukazują one wpływ zastosowania MQL na chropowatość powierzchni stopu miedzi przy obróbce rombowymi płytkami powlekanymi i niepowlekanymi. Ponadto określono efektywne zakresy stosowania MQL w toczeniu wzdłużnym stopu miedzi ze względu na otrzymaną chropowatość powierzchni.
EN
The article presents the results of use the minimum quantity lubrication in the copper alloy turning. The results show the effects of applying an MQL on the surface roughness CuZn40Pb2 material with the use of the uncoated and coated diamond cutting edge. In addition, the article sets the effective fields of application MQL in longitudinal turning of a copper alloy, due to the resulting of surface roughness.
19
Content available Mathematical model describing the course of the process of wear of a hob cutter for various methods of cutting fluid supply
Stachurski W., Midera S., Kruszyński B.
Eksploatacja i Niezawodność
|
2016
|
Vol. 18, no. 1
123--127
EN
In the paper the method of determining the mathematical relationship for calculating the flank wear VBc of the most worn hob tooth is discussed. The relationship, in the form of a multiple regression function, was determined based on the acceptance and rejection method. The data for the calculations was obtained from experiments carried out for hobbing of carbon steel C45 with the use of a cutting fluid supplied in flood mode (WM) and with a minimum quantity lubrication mode (MQL). Based on the developed equations the impact of the selected machining parameters the course of the hob wear was assessed. In the final part of the paper, the obtained mathematical relationships were analysed and verified.
PL
W artykule omówiono metodę wyznaczania zależności matematycznej do obliczania wielkości starcia VBc najbardziej zużytego ostrza frezu ślimakowego. Zależność w postaci funkcji regresji wielorakiej wyznaczono metodą dołączania i odrzucania. Dane do obliczeń uzyskano przeprowadzając badania eksperymentalne frezowania stali węglowej C45 z udziałem cieczy obróbkowej podawanej w trybie obfitym oraz z minimalnym wydatkiem (MQL). W oparciu o wyznaczone równania dokonano oceny wpływu wybranych warunków obróbki na przebieg zużycia frezów ślimakowych. W końcowej części artykułu dokonano analizy uzyskanych zależności matematycznych oraz przeprowadzono ich weryfikację.
20
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
|
2015
|
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.
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