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    Wyświetlanie 1-11 z 11
    Tytuł:
    Influence of the machining parameters on the geometry of surfaces formed by face-milling with a milling head
    Wpływ parametrów skrawania na strukturę geometryczną powierzchni frezowanej czołowo głowicą frezową
    Autorzy:
    Miko, E.
    Nowakowski, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/152546.pdf
    Data publikacji:
    2008
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    skrawanie
    chropowatość
    falistość
    prostoliniowość powierzchni
    cutting
    roughness
    waviness
    straightness
    face milling
    Opis:
    The process of surface generation is complex and depends on numerous factors. The geometry of a surface is described by the sum of all irregularities of the actual surface, i.e. deviations in form, waviness and roughness. This study focuses on determining the influence of selected cutting parameters on the surface geometry of three materials. The laboratory face milling tests were conducted using a milling head with round-nose tools.
    Proces powstawania struktury geometrycznej powierzchni (SPG) jest bardzo złożony i wpływa na niego wiele czynników. Strukturę geometryczną powierzchni opisuje zbiór wszystkich nierówności powierzchni rzeczywistej tj., odchyłki kształtu, falistości, chropowatości. Podjęto próbę określenia wpływu wybranych parametrów skrawania na strukturę geometryczną powierzchni dla różnych materiałów obrabianych. Przeprowadzono badania laboratoryjne frezowania czołowego głowicą frezową z ostrzami o zaokrąglonym narożu.
    Źródło:
    Pomiary Automatyka Kontrola; 2008, R. 54, nr 5, 5; 266-266
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling of components of resultant force during face milling
    Autorzy:
    Sekulić, M.
    Kovač, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1429406.pdf
    Data publikacji:
    2008
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    face milling
    cutting forces
    Opis:
    Cutting forces during face milling are investigated intensively analytically and experimentally. Some of previous approaches to cutting forces determination consider only main (tangential) cutting force component, and according to this define cutting power. The experimental investigations were performed during face milling with a goal to determine models of cutting force versus cutter revolution. Different models were determined according to the cutter approach to the workpiece during cutting angle of revolution.
    Źródło:
    Journal of Machine Engineering; 2008, 8, 2; 65-72
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of primary contact in process of face milling
    Analiza pierwszego styku ostrza skrawającego z materiałem obrabianym i jego wpływ na proces frezowania czołowego
    Autorzy:
    Czánová, T.
    Pilc, J.
    Szigety, M.
    Bobrovsky, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/175693.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    styk narzędzie-przedmiot
    pierwszy styk
    chropowatość
    siły skrawania
    frezowanie czołowe
    tool-workpiece contact
    primary contact
    roughness
    cutting forces
    face milling
    Opis:
    The article deals with the mathematical model of the primary contact of a milling tool in face milling. When designing the mathematical model, there were taken into consideration positive and negative geometry of the cutting wedge with different angle of taking instrument. Mathematical model is the input for experimental verification of the primary contact of milling tool and is aimed at improving the process of milling.
    W artykule przedstawiono model matematyczny pierwszego styku ostrza skrawającego z materiałem obrabianym w procesie frezowania czołowego. W opracowaniu modelu uwzględniono narzędzia skrawające o ujemnej i dodatniej geometrii ostrza w różnym położeniu. Uzyskane zależności stanowiły podstawę do wykonania doświadczalnej weryfikacji procesu frezowania czołowego z uwzględnieniem wpływu geomertrii pierwszego styku ostrza z materiałem obrabianym na parametry wynikowe procesu w celu poprawy jego efektywności.
    Źródło:
    Advances in Manufacturing Science and Technology; 2012, 36, 4; 45-59
    0137-4478
    Pojawia się w:
    Advances in Manufacturing Science and Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of CNC face milling process of Al-6061-T6 aluminum alloy
    Autorzy:
    Jarosz, K.
    Löschner, P.
    Niesłony, P.
    Krolczyk, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/99717.pdf
    Data publikacji:
    2017
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    aluminum alloys
    CNC
    face milling
    optimization
    Opis:
    In modern machining industry, the use of computer software is an integral element in the design of technological processes. This work aims to present possibilities for optimization of milling operations with the use of commercial software designed especially for that use. A face milling operation of an aluminium flange was chosen for this study. Several different optimization strategies were described and their results shown, analysed and discussed. The effect of variable radial depth of cut on cutting force values in milling processes was reflected upon. Additionally, further research involving comparison of experiment results with simulation was proposed. It was proven that correct optimization strategy can reduce machining time for the analysed face milling operation about 37% without exceeding imposed process parameter constraints.
    Źródło:
    Journal of Machine Engineering; 2017, 17, 1; 69-77
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A comparative study of face milling of D2 steel using AL2O3 based nanofluid minimum quantity lubrication and minimum quantity lubrication
    Autorzy:
    Ahsan Ul Haq, Muhammad
    Khan, Aqib Mashood
    Gong, Le
    Xu, Tao
    Meng, Longhui
    Hussain, Salman
    Powiązania:
    https://bibliotekanauki.pl/articles/103049.pdf
    Data publikacji:
    2018
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    face milling
    temperature
    response surface methodology
    steel
    temperatura
    metodologia powierzchni odpowiedzi
    stal
    Opis:
    This study aims to investigate the effects of process parameters: feed, depth of cut and flow rate, on the temperature during face milling of the D2 tool steel under two different lubricant conditions, Minimum Quantity Lubrication (MQL) and Nano fluid Minimum Quantity Lubrication (NFMQL). Deionized water with the flow rate range 200–400 ml/h was used in MQL. 2% by weight concentration of Al2O3 nano particles with deionized water as a base fluid used as NFMQL with the same flow rate. Response surface methodology RSM central composite design CCD was used to design experiment run, modeling and analysis. ANOVA was used for the adequacy and validation of the system. The comparison shows that NFMQL condition reduced temperature more efficiently during machining.
    Źródło:
    Advances in Science and Technology. Research Journal; 2018, 12, 1; 99-105
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of temperature of heat treatment on energetic intensity of flat milling of picea abies
    Autorzy:
    Koleda, P.
    Korčok, M.
    Barcík, S.
    Iľaš, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/409602.pdf
    Data publikacji:
    2018
    Wydawca:
    STE GROUP
    Tematy:
    ThermoWood
    face milling
    cutting power
    energetic efficiency
    picea abies
    Opis:
    The paper deals with the research of the influence of thermal modification temperature of spruce wood on the electric energy consumption of its face milling. Samples of spruce wood heat treated at temperatures of 160, 180, 200 and 220°C were milled at the cutting speed of 20, 40 and 60 m.s-1, the feed rate of 6, 10 and 15 m.min-1, the rake angle of 15° with the depth of the cut of 1 mm. The energy consumption was evaluated from the cutting power, which was based on the difference during milling and idle cycle. The analysis of variance showed a decrease in cutting power with an increasing temperature of thermal modification. The average cutting power value is 137.7 W at the native sample and 80.8 W at the sample treated at 220°C. The Duncan’s test of statistical significance has shown that the thermal modification has a statistically significant effect on the cutting power values.
    Źródło:
    Management Systems in Production Engineering; 2018, 3 (26); 151-156
    2299-0461
    Pojawia się w:
    Management Systems in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of alternative cutter paths on flatness deviations in the face milling of aluminum plate parts
    Autorzy:
    Dobrzynski, M.
    Chuchala, D.
    Orlowski, K. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/99859.pdf
    Data publikacji:
    2018
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    process precision
    face milling
    radiator
    paths strategies
    flatness deviation
    Opis:
    In this paper the relationships between the alternative machining paths and flatness deviations of the aluminum plate part, were presented. The flatness tolerance of the main surface of the plate part has crucial meaning due to the assembly requirement of piezoelectric elements on the radiator. The aluminum bodies under investigation are the base part of the radiators with crimped feathers for the train industry. The surface of the aluminum plate part was milled using three different milling strategies: along of longer or shorter side of workpiece and at an angle of 45°. The aluminum bodies were machined on milling centre ecoMILL 70 DMG MORI. The flatness deviation measurements were carried out on the Coordinated Measuring Machine Altera 7.5.5 Nikon Metrology NV. These measurements were made during the manufacturing process of the radiator, namely after machining, however, before the process crimping of feathers. The results that were obtained enables the validation of assumed milling path strategies in connection of the subsequent machining and assembly processes.
    Źródło:
    Journal of Machine Engineering; 2018, 18, 1; 80-87
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Methods of comparison of surface texture based on fractal dimension and Hotelling’s T2 test
    Autorzy:
    Gogolewski, Damian
    Powiązania:
    https://bibliotekanauki.pl/articles/99764.pdf
    Data publikacji:
    2019
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    face milling
    fractal dimension
    surface roughness
    test
    Opis:
    Comparative analysis of the surface texture of machine parts can be successfully carried out using statistical tests. The paper presents a methodology of method used to compare the surface texture by applying Hotelling’s T2 test as well as a method used to evaluate surface topography by applying fractal dimension. The tests were carried out on samples produced with the use of face milling process for four types of materials. The following types of steel were used: 40HM, C45, NC6 and WCL. For each type of material, four areas were machined with the same machining parameters. Based on these results a decision was made whether the surfaces, despite the same machining conditions, were significantly different from each other. Furthermore, the analysis indicated that the fractal dimension enabled to characterise signal irregularities in quantitative and qualitative way.
    Źródło:
    Journal of Machine Engineering; 2019, 19, 4; 82-90
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An assessment of applicability of the two-dimensional wavelet transform to assess the minimum chip thickness determination accuracy
    Autorzy:
    Gogolewski, Damian
    Makieła, Włodzimierz
    Nowakowski, Łukasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1849153.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    wavelet analysis
    face milling
    minimum chip thickness
    surface texture
    Opis:
    The objective of the study was to assess the potential use of optical measuring instruments to determine the minimum chip thickness in face milling. Images of scanned surfaces were analyzed using mother wavelets. Filtration of optical signals helped identify the characteristic zones observed on the workpiece surface at the beginning of the cutting process. The measurement data were analyzed statistically. The results were then used to estimate how accurate each measuring system was to determine the minimum uncut chip thickness. Also, experimental verification was carried out for each mother wavelet to assess their suitability for analyzing surface images.
    Źródło:
    Metrology and Measurement Systems; 2020, 27, 4; 659-672
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Waviness at dry high-speed face milling of some hard steels
    Autorzy:
    Beşliu-Băncescu, Irina
    Slătineanu, Laurenţiu
    Coteaţă, Margareta
    Powiązania:
    https://bibliotekanauki.pl/articles/2052146.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    waviness
    dry high-speed face milling
    hard steels
    milling parameters
    hardness
    empirical mathematical models
    Opis:
    Waviness is a parameter used to complete information on the machined surface state. There is little scientific and technical information on the influence exerted by the cutting conditions and the workpiece material hardness on the values of some parameters that define the waviness of milled surface. No works have been identified to present such information for dry high-speed face milling applied to hard steel workpieces. A factorial experiment with four independent variables at three variation levels was planned to model the influence of milling speed, feed, cutting depth, and steel hardness on the total heights of the profile and surface waviness for dry high-speed face milling. Mathematical processing of experimental results was used to identify the power type function and empirical mathematical models. These models highlight the direction of variation and the intensity of influence exerted by the considered input factors on the values of two waviness parameters in the case of dry high-speed face milling of samples made of four hard steels. It has been observed that the increase in steel hardness increases the total heights of the profile and surface waviness. In the case of two types of steel, a good correlation was identified between the values of the total profile waviness height and the total surface waviness height, respectively, using the Pearson correlation coefficient.
    Źródło:
    Metrology and Measurement Systems; 2021, 28, 4; 735-749
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Friction Machining on Low Carbon Steel with Titanium Traces in terms of Surface Hardening
    Autorzy:
    Sheikh, Ali R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2203931.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    milling machine
    high speed steel
    mild steel
    face milling
    thermomechanical treatment
    frezarka
    stal szybkotnąca
    stal miękka
    frezowanie czołowe
    obróbka termomechaniczna
    Opis:
    This work is an experimental study of thermo-mechanical surface hardening of mild steel with trace elements like titanium in negligible concentrations. This is somewhat an advanced technique used to harden steel surface which can be hardened in many typical ways. The concept is combining the thermal as well as mechanical technique to attain better results. It is quite obvious that mechanical refers to the compressive loading during machining and thermal refers to producing heat on the surface of work piece. The ideal conditions are when the heat produced is enough to achieve austenite and then subsequent quick cooling helps in the formation of marten site, which is metallurgically the most highly strong phase of steel, in terms of hardness. The coolant used preferably is the emulsified oil which flows on the surface during machining with variable rate of flow as the optimum effect is. This process hardens the surface of steel and increases its resistance against wear and abrasion. Preference is to achieve surface hardening using the conventional equipment so that operational cost is kept low and better results are attained. This technique has been quite successful in the laboratory. It can be termed as friction hardening. Some improvements in the process scheme and working environment can be made to get better results.
    Źródło:
    Archives of Foundry Engineering; 2022, 22, 4; 41--46
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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