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    Wyświetlanie 1-9 z 9
    Tytuł:
    Contemporary challenges in tool condition monitoring
    Autorzy:
    Jemielniak, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/99861.pdf
    Data publikacji:
    2019
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    tool wear monitoring
    metal cutting
    signal processing
    signal feature
    Opis:
    Implementation of robust, reliable tool condition monitoring (TCM) systems in one of the preconditions of introducing of Industry 4.0. While there are a huge number of publications on the subject, most of them concern new, sophisticated methods of signal feature extraction and AI based methods of signal feature integration into tool condition information. Some aspects of TCM algorithms, namely signal segmentation, selection of useful signal features, laboratory measured tool wear as reference value of tool condition – are nowadays main obstacles in the broad applicationof TCM systems in the industry. These aspects are discussed in the paper, and some solutions of the problems are proposed.
    Źródło:
    Journal of Machine Engineering; 2019, 19, 1; 48-61
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of Results of Non-Contact Coordinate Measurement of a Cutting Tool Applied for Mould Machining
    Autorzy:
    Bazan, Anna
    Magdziak, Marek
    Jamuła, Barbara
    Powiązania:
    https://bibliotekanauki.pl/articles/11236770.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    cutting tools
    tool wear monitoring
    mould machining
    measuring technique
    non-contact measurements
    accuracy of measurements
    narzędzia skrawające
    zużycie narzędzi
    obróbka form
    technika pomiarowa
    pomiar bezkontaktowy
    dokładność pomiaru
    Opis:
    One of the main problems of machining of moulds is the need for an effective monitoring system of wear of cutting tools. This paper presents the results of coordinate measurements of a cutting tool which were obtained by using the non-contact measuring system based on the ACCURA II coordinate measuring machine equipped with the LineScan laser measuring probe and the Calypso metrology software. Investigations were carried out for several measurement strategies including different measurement resolutions and scanning speeds. The results of the coordinate measurements obtained by using the above-mentioned coordinate measuring system were compared to the reference data measured by means of the InfiniteFocus microscope. The measurement results were analysed by means of two software packages: Focus Inspection and Zeiss Reverse Engineering. The point clouds measured by using the LineScan probe were characterized by the selected deviation statistics equal to 4-6 μm when a good match between measurement points and the reference data was obtained. Moreover, these statistics mainly depend on the measurement resolution. The results of the performed experimental research allowed for drawing conclusions concerning the significance of the effect of the adopted measurement strategies on the results of the non-contact coordinate measurements of the selected cutting tool. The application of the non-contact coordinate measurements to the above-mentioned measurement task may contribute to the development of regeneration methods for cutting tools applied for mould manufacturing.
    Źródło:
    Archives of Foundry Engineering; 2022, 22, 4; 121--127
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tool wear condition monitoring in milling process based on data fusion enhanced long short-term memory network under different cutting conditions
    Autorzy:
    Zheng, Guoxiao
    Sun, Weifang
    Zhang, Hao
    Zhou, Yuqing
    Gao, Chen
    Powiązania:
    https://bibliotekanauki.pl/articles/2038054.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    tool wear condition monitoring
    empirical mode decomposition
    variational mode decomposition
    fourier synchro squeezed transform
    neighborhood component analysis
    long short-term memory network
    Opis:
    Tool wear condition monitoring (TCM) is essential for milling process to ensure the machining quality, and the long short-term memory network (LSTM) is a good choice for predicting tool wear value. However, the robustness of LSTM- based method is poor when cutting condition changes. A novel method based on data fusion enhanced LSTM is proposed to estimate tool wear value under different cutting conditions. Firstly, vibration time series signal collected from milling process are transformed to feature space through empirical mode decomposition, variational mode decomposition and fourier synchro squeezed transform. And then few feature series are selected by neighborhood component analysis to reduce dimension of the signal features. Finally, these selected feature series are input to train the bidirectional LSTM network and estimate tool wear value. Applications of the proposed method to milling TCM experiments demonstrate it outperforms significantly SVR- based and RNN- based methods under different cutting conditions.
    Źródło:
    Eksploatacja i Niezawodność; 2021, 23, 4; 612-618
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Process monitoring in end milling using polar figures
    Autorzy:
    Goetz, Sven
    Schraknepper, Daniel
    Faustini, Gabriel
    Bergs, Thomas
    Powiązania:
    https://bibliotekanauki.pl/articles/100129.pdf
    Data publikacji:
    2020
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    process monitoring
    tool wear
    polar figur
    Opis:
    Knowledge of the tool wear state in machining has become an important issue in research and industrial application. Current systems use the spindle power or cutting force as measured variable and refer it to a taught set point. However, this method lacks the ability to adapt to new work piece geometries. A new approach focusses on the tool instead of the work piece, and uses a sensory tool holder with integrated strain gauges. This tool holder provides polar figures whose shapes relate to the engagement conditions and whose area is a function of the tool load. As the tool load increases with tool wear, the area of the polar figures provides information about the tool wear status, and with knowledge about the engagement conditions, the model can be calibrated.
    Źródło:
    Journal of Machine Engineering; 2020, 20, 3; 95-105
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New method for determining single cutting edge breakage of a multi-tooth milling tool based on acceleration measurements of an instrumented tool holder
    Autorzy:
    Ramsauer, Christoph
    Bleicher, Friedrich
    Powiązania:
    https://bibliotekanauki.pl/articles/1428710.pdf
    Data publikacji:
    2021
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    condition monitoring
    sensors integration
    tool wear
    algorithm
    Opis:
    In machining applications predominantly for automated machining cells, tool life is often not used to its full extend and cutting tools are exchanged prematurely to avoid tool breakage and thus machine downtime or even damage at work piece or machine. Both effective process monitoring and adequate process control require reliable data from sensors and derived indicators that enable meaningful evaluation. Acceleration measurement by the instrumented tool holder provides signals with high quality from close to the cutting zone. Using the monitoring system, the gained data of the instrumented tool holder can be analyzed especially for the use case of unexpected tool wear, chipping of the cutting edge or breakouts at end mills. This paper describes the data analysis based on the rotational sensor and the corresponding effects on the measurement, an advanced assessment of the spectral distribution in the frequency domain and the experimental results of a test series.
    Źródło:
    Journal of Machine Engineering; 2021, 21, 1; 67-77
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of band sawing based on cutting forces
    Autorzy:
    Thaler, T.
    Bric, I.
    Bric, R.
    Potocnik, P.
    Muzic, P.
    Govekar, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/99509.pdf
    Data publikacji:
    2012
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    band sawing
    cutting forces
    condition monitoring
    tool wear
    chatter
    Opis:
    Band sawing is one of the most efficient methods for which in general it is known that uneven tool wear, chatter and cutting blade defects can affect cutting performance significantly. A data acquisition system was arranged on an industrial band saw machine in order to characterize the band sawing process based on measurements of forces. In this paper, the cutting force signals are analyzed in order to demonstrate important relations to workpiece and cutting blade properties. It is shown that cutting forces contain information about in homogeneity of a cut workpiece. Signals of cutting forces also reveal important properties of blade geometry that is related to uneven blade wear. Discontinuities such as blade welding are clearly evident in force signals and it is shown that unevenness of blade backing geometry can cause a significant variation in forces due to wedging between the workpiece and a blade support. An original method for blade shape extraction from force signals is presented in detail. Paper also reports on chatter phenomena observed at specific cutting conditions. Possible solutions to the addressed problems and phenomena are discussed in the conclusion.
    Źródło:
    Journal of Machine Engineering; 2012, 12, 1; 41-54
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of sensor-based condition monitoring methods as in-process tool wear and breakage indices - case study: drilling
    Autorzy:
    Tsanakas, J. A.
    Botsaris, P. N.
    Amirids, I. G.
    Galeridis, G. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/329544.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    tool condition monitoring
    vibration signals
    thermal signatures
    spindle motor current
    tool wear
    statistical analysis
    frequency domain analysis
    Opis:
    Today, effective unmanned machining operations and automated manufacturing are unthinkable without tool condition monitoring (TCM). Undoubtedly, the implementation of an adaptable, reliable TCM and its successful employment in industry, emerge as major instigations over the recent years. In this work, a sensor-based approach was deployed for the in-process monitoring and detection of tool wear and breakage in drilling. In particular, four widely reported indirect methods for tool wear monitoring, i.e. vibration signals together with thermal signatures, spindle motor and feed motor current measurements were obtained during numerous drillings, under fixed conditions. The acquired raw data was, then, processed both statistically and in the frequency domain, in order to distinguish the meaningful information. The study of the latter is influential in identifying the trend of specific signals toward tool wear mechanism. The efficiency of this information as a tool wear and/or breakage index is the feature that determines the effectiveness and reliability of a potential indirect TCM approach based on a multisensor integration. The paper concludes with a discussion of both advantages and limitations of this effort, stressing the necessity to develop simple, fast condition monitoring methods which are, generally, less likely to fail.
    Źródło:
    Diagnostyka; 2012, 2(62); 3-13
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of a computer tool monitoring system in CNC machining centres
    Autorzy:
    Kolny, D.
    Więcek, D.
    Ziobro, P.
    Krajčovič, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/117808.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Promocji Wiedzy
    Tematy:
    current process control
    tool wear
    monitoring system
    process optimization
    kontrola procesu
    zużycie narzędzia
    system monitorujący
    optymalizacja procesu
    Opis:
    The article presents practical knowledge about production process optimisation as a result of implementing a specialized system monitoring the work of machining tools. It features complex results of the conducted research with use of dedicated equipment and software, whose unconventional application may appear to be an effective IT tool for taking operational and strategic decisions in the machining area. This results from the possibility of analysing the obtained data in both current and long-term perspective, and taking decisions on this basis, which significantly conditions the rationality of using this type of solutions.
    Źródło:
    Applied Computer Science; 2017, 13, 4; 7-19
    1895-3735
    Pojawia się w:
    Applied Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie zaawansowanego systemu kontroli pracy narzędzi celem doskonalenia funkcjonowania procesu obróbki skrawaniem
    Autorzy:
    Kolny, D.
    Więcek, D.
    Ziobro, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/118576.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    bieżąca kontrola procesu
    zużycie narzędzia
    systemy monitorowania uszkodzeń
    optymalizacja procesu
    current process control
    tool wear
    damage monitoring system
    process optimalization
    Opis:
    W niniejszym artykule została zawarta wiedza teoretyczna i praktyczna z zakresu optymalizacji procesu produkcyjnego, poprzez zaimplementowanie w nim specjalistycznego systemu monitorowania pracy narzędzi na obrabiarkach. Zamieszczone treści są kompleksowym zestawieniem wyników przeprowadzonych badań z wykorzystaniem dedykowanego sprzętu i oprogramowania. Przedstawiona w tym tekście problematyka jest aktualnym odzwierciedleniem jednego z wielu wyzwań stojących przed przedsiębiorstwami branży motoryzacyjnej, w których ciągle poszukiwane są innowacyjne rozwiązania napotykanych problemów, a przedstawione wyniki badań są jednym z takich przykładów.
    This article includes theoretical and practical knowledge of improvement of the manufacturing process by implementing tool monitoring system on the machine tool. The paper describes an issue, which is the actual reflection of one from many challenges which automotive companies have to face. Innovative solutions are constantly sought for and the article presents results of research done in this area with the use of dedicated equipment and software.
    Źródło:
    Zeszyty Naukowe Wydziału Elektroniki i Informatyki Politechniki Koszalińskiej; 2017, 11; 11-28
    1897-7421
    Pojawia się w:
    Zeszyty Naukowe Wydziału Elektroniki i Informatyki Politechniki Koszalińskiej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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