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    Wyświetlanie 1-8 z 8
    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 influence of drying parameters on wood properties
    Wpływ parametrów suszenia na właściwości drewna
    Autorzy:
    Baranski, J.
    Chuchala, D.
    Orlowski, K.
    Muzinski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/8980.pdf
    Data publikacji:
    2014
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    wood
    drying parameter
    wood property
    cutting power
    fracture property
    drying condition
    sawing process
    Źródło:
    Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2014, 86
    1898-5912
    Pojawia się w:
    Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental study of mild steel cutting process by using the plasma arc method
    Autorzy:
    Magid, H.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2055758.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    cutting power
    edge roughness
    mild steel
    plasma arc cutting
    scanning speed
    moc skrawania
    chropowatość
    stal miękka
    cięcie plazmowe
    prędkość skanowania
    Opis:
    Purpose: In this study, plasma arc cutting (PAC) is an industrial process widely used for cutting various away types of metals in several operating conditions. Design/methodology/approach: It is carried out a systematic or an authoritative inquiry to discover and examine the fact, the plasma cutting process is to establish the accuracy and the quality of the cut in this current paper assessed a good away to better the cutting process. Findings: It found that the effect of parameters on the cutting quality than on the results performed to accomplish by statistical analysis. Research limitations/implications: The objective of the present work paper is to achieve cutting parameters, thus the quality of the cutting process depends upon the plasma gas pressure, scanning speed, cutting power, and cutting height. Practical implications: The product of the plasma cutting process experimentally has been the quality of the cutting equipment that was installed to monitor kerf width quality by exam the edge roughness, kerf width, and the size of the heat-affected zone (HAZ). Originality/value: The results reveal that were technically possessed of including all the relevant characteristics, then a quality control for the cutting and describe the consequence of the process parameters.
    Źródło:
    Journal of Achievements in Materials and Manufacturing Engineering; 2021, 108, 2; 75--85
    1734-8412
    Pojawia się w:
    Journal of Achievements in Materials and Manufacturing Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Heat Treatment on Machining Properties of the AlSi9Cu3(Fe) Alloy
    Autorzy:
    Wieroński, W.
    Pezda, J.
    Ponikwia, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/379474.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    silumin
    heat treatment
    machinability
    refining
    mechanical properties
    cutting power
    aluminum alloys
    obróbka cieplna
    obróbka mechaniczna
    rafinacja
    właściwości mechaniczne
    cięcie
    stopy aluminium
    Opis:
    Automation of machining operations, being result of mass volume production of components, imposes more restrictive requirements concerning mechanical properties of starting materials, inclusive of machinability mainly. In stage of preparation of material, the machinability is influenced by such factors as chemical composition, structure, mechanical properties, plastic working and heat treatment, as well as a factors present during machining operations, as machining type, cutting parameters, material and geometry of cutting tools, stiffness of the system: workpiece – machine tool – fixture and cutting tool. In the paper are presented investigations concerning machinability of the EN AC-AlSi9Cu3(Fe) silumin put to refining, modification and heat treatment. As the parameter to describe starting condition of the alloy was used its tensile strength Rm. Measurement of the machining properties of the investigated alloy was performed using a reboring method with measurement of cutting force, cutting torque and cutting power. It has been determined an effect of the starting condition of the alloy on its machining properties in terms of the cutting power, being indication of machinability of the investigated alloy. The best machining properties (minimal cutting power - Pc=48,3W) were obtained for the refined alloy, without heat treatment, for which the tensile strength Rm=250 MPa. The worst machinability (maximal cutting power Pc=89,0W) was obtained for the alloy after refining, solutioning at temperature 510 oC for 1,5 hour and aged for 5 hours at temperature 175 oC. A further investigations should be connected with selection of optimal parameters of solutioning and ageing treatments, and with their effect on the starting condition of the alloy in terms of improvement of both mechanical properties of the alloy and its machining properties, taking into consideration obtained surface roughness.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 3; 137-140
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new aspects of hard machining using CBN tools with variable tool corner radius and tool wear effect
    Nowe aspekty skrawania na twardo narzędziami z CBN ze zmiennym promieniem naroża i efektem zużycia ostrza
    Autorzy:
    Grzesik, W.
    Żak, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/175910.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hardened steel
    tool corner radius
    cutting force
    specific cutting energy
    cutting power
    surface roughness
    surface material ratio
    stal utwardzona
    promień naroża ostrza
    składowe siły skrawania
    energia właściwa skrawania
    moc skrawania
    chropowatość powierzchni
    udział materiałowy powierzchni
    Opis:
    In this paper some important mechanical cutting characteristics such as cutting forces, specific cutting energy and cutting power were determined when finish turning of hardened 41Cr4 alloy steel and AISI 52100 and JIS-SUJ2 bearing steels using CBN tools with variable tool corner radius based on the experimental study and literature data. The tool corner radius was varied from 400 to 2400 µm and, in addition, flank wear effect was taken into account. Moreover, surface roughness produced by CBN tools with different tool corner radius was compared and surface finish obtained was characterized in terms of potential functional performance. As a result, the changes of Ra and Rz roughness parameters and relevant material distribution curves and bearing parameters in the form of Symmetrical Curve of Geometrical Contact (SCGC) are presented.
    W pracy określono niektóre charakterystyki procesu skrawania m.in. składowe siły, energię właściwą i moc skrawania w wykańczającym toczeniu utwardzonej stali stopowej 41Cr4 oraz stali łożyskowej AISI 52100 i JIS-SUJ2 narzędziami z CBN o zmiennym promieniu naroża. W analizie wyników uwzględniono dane doświadczalne i literaturowe. Stosowano promień naroża w zakresie od 400 do 2400 µm. Ustalono również wpływ zużycia ostrza na powierzchni przyłożenia. Dodatkowo, porównano chropowatość powierzchni generowaną ostrzami z CBN o zmiennym promieniu naroża oraz potencjalne właściwości eksploatacyjne powierzchni. Uzyskano zmianę zależności parametrów chropowatości powierzchni Ra i Rz oraz parametrów udziału materiałowego w postaci symetrycznych krzywych kontaktu geometrycznego (SCGC) powierzchni – krzywych Kaczmarka.
    Źródło:
    Advances in Manufacturing Science and Technology; 2017, 41, 1; 5-20
    0137-4478
    Pojawia się w:
    Advances in Manufacturing Science and Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Laboratory Tests of a Speed Control System for Roadheader Cutting Heads
    Autorzy:
    Joostberens, J.
    Heyduk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2064888.pdf
    Data publikacji:
    2018
    Wydawca:
    STE GROUP
    Tematy:
    speed control
    roadheader
    cutting optimization
    PI controller
    power efficiency
    Opis:
    The paper presents selected results of the laboratory tests of the speed control system for the R-130 roadheader with an inverter-fed cutting heads drive. The results recorded for the variable speed system have been compared with the measurement obtained for the network supplied drive. There have been noticed some oscillations after rapid current overloads. They are due to the operation of the internal current controller of the PWM-inverter, The oscillations are fast decaying - so they prove the results of initial system stability checking. Generally, the automatic speed control, tracking the optimum speed level calculating by supervisory speed adjuster makes possible to better utilize the motor power throughout the whole cutting time. The better operating conditions of the motor cause increase in the whole system power efficiency (even in spite of additional losses in the inverter circuit) Additionally the sped control reduces dynamical overloads. This fact can have a positive influence on the whole system reliability. The speed control subsystem is a part of the whole control system which contains also close-loop boom angular position and velocity control circuits.
    Źródło:
    Multidisciplinary Aspects of Production Engineering; 2018, 1, 1; 153--159
    2545-2827
    Pojawia się w:
    Multidisciplinary Aspects of Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Moisture influence on the unitary energy of a cutting process of selected energy plants
    Wplyw wilgotnosci na energie jednostkowa ciecia wybranych roslin energetycznych
    Autorzy:
    Rode, H.
    Witkowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/793730.pdf
    Data publikacji:
    2011
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    cutting process
    power consumption
    cutting energy
    unitary energy
    energy plant
    moisture
    Salix viminalis
    Sida hermaphrodita
    Reynoutria sachalinensis
    Jerusalem artichoke
    Źródło:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2011, 11
    1641-7739
    Pojawia się w:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling and Designing of Ultrasonic Welding Systems
    Autorzy:
    Milewski, A.
    Kluk, P.
    Kardyś, W.
    Kogut, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/176732.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ultrasonic welding and cutting system
    ultrasonic stack modelling and designing
    digitally controlled ultrasonic power supply
    ultrasonic stack e-diagnosis
    Opis:
    This article presents the main stages and challenges in modelling and designing of modern ultrasonic welding and cutting systems. First, the key components of such a system, such as an ultrasonic stack (consisting of a high power ultrasonic transducer and a sonotrode) and a digitally controlled ultrasonic power supply with precise control of the output power, have been considered. Next, a concept of measurement system for verification and validation of mathematical models of ultrasonic stacks and its components has been presented. Finally, a method of ultrasonic stack e-diagnosis based on ultrasonic transducer electrical impedance measurement during welding and cutting process has been described.
    Źródło:
    Archives of Acoustics; 2015, 40, 1; 93-99
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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