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Wyszukujesz frazę "coordinate measuring" wg kryterium: Temat

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    Tytuł:
    Device for interim check of coordinate measuring machines
    Autorzy:
    Arenhart, Rodrigo Schons
    Pizzolato, Morgana
    Beuren, Fernanda Hänsch
    Souza, Adriano Mendonça
    Cantorski da Rosa, Leandro
    Powiązania:
    https://bibliotekanauki.pl/articles/2051859.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    coordinate measuring machine
    device
    interim check
    Opis:
    This paper presents a new interim check device for coordinate measuring machines (CMMs) built from an AISI 1020 carbon steel bar with the incorporation of calibrated spheres. This artifact’s construction was made to make the interim checks of machines of this type faster and cheaper. Three devices were designed based on the ISO 10360-2 standard, the good practice guide No. 42 (NPL), and prominent authors’ research on the subject. The three options are presented in detail, but only one was built due to budget, size, and adaptability restrictions. An exploratory study was conducted to verify the device’s usability in two CMMs and concluded that the differences between the measurements are not significant. However, one machine had absolute variation values and a total standard deviation higher than the other, generating a larger expanded uncertainty.
    Źródło:
    Metrology and Measurement Systems; 2022, 29, 1; 143-158
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improved calibration uncertainty assessment technique in coordinate metrology considering thermal influences
    Autorzy:
    Mussatayev, Meirbek
    Huang, Meifa
    Nurtas, Marat
    Arynov, Azamat
    Powiązania:
    https://bibliotekanauki.pl/articles/2052177.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    coordinate measuring machine
    coordinate metrology
    uncertainty
    quality control
    thermal influence
    Opis:
    Reliable measurement uncertainty is a crucial part of the conformance/nonconformance decision-making process in the field of Quality Control in Manufacturing. The conventional GUM-method cannot be applied to CMM measurements primarily because of lack of an analytical relationship between the input quantities and the measurement. This paper presents calibration uncertainty analysis in commercial CMM-based Coordinate Metrology. For the case study, the hole-plate calibrated by the PTB is used as a workpiece. The paper focuses on thermo-mechanical errors which immediately affect the dimensional accuracy of manufactured parts of high-precision manufacturers. Our findings have highlighted some practical issues related to the importance of maintaining thermal equilibrium before the measurement. The authors have concluded that the thermal influence as an uncertainty contributor of CMM measurement result dominates the overall budgets for this example. The improved calibration uncertainty assessment technique considering thermal influence is described in detail for the use of a wide range of CMM users.
    Źródło:
    Metrology and Measurement Systems; 2021, 28, 4; 609--626
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Statistical Approach To Prediction Of The CMM Drift Behaviour Using A Calibrated Mechanical Artefact
    Autorzy:
    Cuesta, E.
    Alvarez, B.
    Sanchez-Lasheras, F.
    Gonzalez-Madruga, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/221090.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    multivariate regression models
    coordinate measuring machine
    drift behaviour
    calibration
    Opis:
    This paper presents a multivariate regression predictive model of drift on the Coordinate Measuring Machine (CMM) behaviour. Evaluation tests on a CMM with a multi-step gauge were carried out following an extended version of an ISO evaluation procedure with a periodicity of at least once a week and during more than five months. This test procedure consists in measuring the gauge for several range volumes, spatial locations, distances and repetitions. The procedure, environment conditions and even the gauge have been kept invariables, so a massive measurement dataset was collected over time under high repeatability conditions. A multivariate regression analysis has revealed the main parameters that could affect the CMM behaviour, and then detected a trend on the CMM performance drift. A performance model that considers both the size of the measured dimension and the elapsed time since the last CMM calibration has been developed. This model can predict the CMM performance and measurement reliability over time and also can estimate an optimized period between calibrations for a specific measurement length or accuracy level.
    Źródło:
    Metrology and Measurement Systems; 2015, 22, 3; 417-428
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of different probing systems used in articulated arm coordinate measuring machines
    Autorzy:
    Brau, A.
    Valenzuela, M.
    Santolaria, J.
    Aguilar, J. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/221100.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    articulated arm coordinate measuring machine
    probing systems
    self-centering active probe
    Opis:
    This paper presents a comparison of different techniques to capture nominal data for its use in later verification and kinematic parameter identification procedures for articulated arm coordinate measuring machines (AACMM). By using four different probing systems (passive spherical probe, active spherical probe, self-centering passive probe and self-centering active probe) the accuracy and repeatability of captured points has been evaluated by comparing these points to nominal points materialized by a ball-bar gauge distributed in several positions of the measurement volume. Then, by comparing these systems it is possible to characterize the influence of the force over the final results for each of the gauge and probing system configurations. The results with each of the systems studied show the advantages and original accuracy obtained by active probes, and thus their suitability in verification (active probes) and kinematic parameter identification (self-centering active probes) procedures.
    Źródło:
    Metrology and Measurement Systems; 2014, 21, 2; 233-246
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Accuracy of the photogrametric measuring system for large size elements
    Autorzy:
    Grzelka, M.
    Budzik, G.
    Marciniak, L.
    Gapiński, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/379891.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    photogrammetry
    coordinate measuring technique
    maximum permissible error
    size measurement
    optical coordinate measuring system
    fotogrametria
    współrzędnościowa technika pomiarowa
    błąd maksymalny dopuszczalny
    pomiar wielkości
    optyczna współrzędnościowa technika pomiarowa
    Opis:
    The aim of this paper is to present methods of estimating and guidelines for verifying the accuracy of optical photogrammetric measuring systems, using for measurement of large size elements. Measuring systems applied to measure workpieces of a large size which often reach more than 10000mm require use of appropriate standards. Those standards provided by the manufacturer of photogrammetric systems are certified and are inspected annually. To make sure that these systems work properly there was developed a special standard VDI / VDE 2634, "Optical 3D measuring systems. Imaging systems with point - by - point probing. " According to recommendations described in this standard research on accuracy of photogrametric measuring system was conducted using K class gauge blocks dedicated to calibrate and test accuracy of classic CMMs. The paper presents results of research of estimation the actual error of indication for size measurement MPEE for photogrammetric coordinate measuring system TRITOP.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 2 spec.; 75-80
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of Free-Form Surfaces’ Reconstruction Accuracy
    Autorzy:
    Wójcik, A.
    Niemczewska-Wójcik, M.
    Sładek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/220773.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    reverse engineering
    accuracy assessment
    free-form surface
    coordinate measuring machine
    radius correction
    Opis:
    The paper presents the problem of assessing the accuracy of reconstructing free-form surfaces in the CMM/CAD/CAM/CNC systems. The system structure comprises a coordinate measuring machine (CMM) PMM 12106 equipped with a contact scanning probe, a 3-axis Arrow 500 Vertical Machining Center, QUINDOS software and Catia software. For the purpose of surface digitalization, a radius correction algorithm was developed. The surface reconstructing errors for the presented system were assessed and analysed with respect to offset points. The accuracy assessment exhibit error values in the reconstruction of a free-form surface in a range of ± 0.02 mm, which, as it is shown by the analysis, result from a systematic error.
    Źródło:
    Metrology and Measurement Systems; 2017, 24, 2; 303-312
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Practical measurement strategies for verification of freeform surfaces using coordinate measuring machines
    Autorzy:
    Rajamohan, G.
    Shunmugam, M. S.
    Samuel, G. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/220456.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    freeform surface
    coordinate measuring machine
    machining errors
    probe size
    sampling strategies
    substitute geometry
    Opis:
    Freeform surfaces have wider engineering applications. Designers use B-splines, Non-Uniform Rational Bsplines, etc. to represent the freeform surfaces in CAD, while the manufacturers employ machines with controllers based on approximating functions or splines. Different errors also creep in during machining operations. Therefore the manufactured freeform surfaces have to be verified for conformance to design specification. Different points on the surface are probed using a coordinate measuring machine and substitute geometry of surface established from the measured points is compared with the design surface. The sampling points are distributed according to different strategies. In the present work, two new strategies of distributing the points on the basis of uniform surface area and dominant points are proposed, considering the geometrical nature of the surfaces. Metrological aspects such as probe contact and margins to be provided along the sides have also been included. The results are discussed in terms of deviation between measured points and substitute surface as well as between design and substitute surfaces, and compared with those obtained with the methods reported in the literature.
    Źródło:
    Metrology and Measurement Systems; 2011, 18, 2; 209-222
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analytical evaluation of the uncertainty of coordinate measurements of geometrical deviations. Models based on the distance between point and plane
    Analityczne wyznaczanie niepewności współrzędnościowych pomiarów odchyłek geometrycznych. Modele bazujące na odległości punktu od płaszczyzny
    Autorzy:
    Jakubiec, W.
    Płowucha, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/176011.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    coordinate measuring technique
    measurement uncertainty
    geometrical deviations
    współrzędnościowa technika pomiarowa
    niepewność pomiaru
    odchyłki geometryczne
    Opis:
    In this paper a series discussing the possibility of analytical evaluation of the uncertainty of coordinate measurements is presented. It presents models of evaluation of uncertainty of some geometric deviations (such as flatness, perpendicularity of axes, position of point, axis and plane) based on the formula for the point-plane distance. An important element of the presented methodology for determining the uncertainty of measurement is the use of mathematical minimum number of characteristic points of the measured workpiece and expressing the deviation as a function of coordinates’ differences of the points.
    W artykule omówiono możliwość analitycznego określania niepewności pomiarów współrzędnościowych. Przedstawiono modele wyznaczania niepewności niektórych odchyłek geometrycznych (np. płaskości, prostopadłości osi, pozycji) bazujące na równaniach na odległość punktu od płaszczyzny. Istotnym elementem tej metodyki wyznaczania niepewności pomiaru jest przyjęcie minimalnej liczby charakterystycznych punktów mierzonego przedmiotu oraz wyrażenie odchyłki jako funkcji różnic wartości współrzędnych tych punktów.
    Źródło:
    Advances in Manufacturing Science and Technology; 2013, 37, 3; 5-16
    0137-4478
    Pojawia się w:
    Advances in Manufacturing Science and Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Algorithms for measurement of bended elements by means of measuring arms equipped with contactless probes
    Algorytm pomiaru elementów rurkowych za pomocą ramion pomiarowych z głowicą bezstykową
    Autorzy:
    Jakubiec, W.
    Wojtyła, M.
    Płowucha, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/175747.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    coordinate measuring technique
    measuring arm
    geometrical tolerances
    contactless probe
    uncertainty of measurement
    współrzędnościowa technika pomiarowa
    ramię pomiarowe
    tolerancje geometryczne
    głowica bezstykowa
    niepewność pomiaru
    Opis:
    The paper presents proposals of algorithms for the control software for measuring arms equipped with the contactless probes (so called „V-probes”) as well as algorithms for bended elements' manufacturing-accuracy evaluation. The working principle of the V-probes is described. The critical analysis of the accuracy requirements specification for the bended elements is carried out. The typical measuring errors sources are pointed out.
    W pracy przedstawiono opracowane algorytmy oprogramowania dla ramion pomiarowych wyposażonych w głowice bezstykowe V, także algorytmy prowadzenia analizy wyników pomiarów rurek powyginanych. Omówiono zasadę działania głowic bezstykowych V. Przeprowadzono krytyczną analizę dokładności wykonania elementów rurkowych. Wskazano typowe źródła błędów pomiaru.
    Źródło:
    Advances in Manufacturing Science and Technology; 2013, 37, 1; 119-130
    0137-4478
    Pojawia się w:
    Advances in Manufacturing Science and Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of the R&R method to determine the operator’s influence on measurements made with a coordinate measuring arm
    Autorzy:
    Jurkowski, Sławomir
    Powiązania:
    https://bibliotekanauki.pl/articles/139884.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    R&R
    metrology
    coordinate
    measuring arm
    metrologia
    współrzędna
    ramię pomiarowe
    Opis:
    The article presents the methodology to estimate the operator influence on measurements performed with a coordinate measuring arm. The research was based on the R&R analysis, adapted to the specifics of redundant devices such as ACMM (selection of a test object difficult to measure). The method provides for measurements by three operators, who measure ten parts in two or three samples (measurement data developed in the article relate to the three measurements of holes). The methodology is designed to identify which operator has the best predisposition to perform measurements (generates the smallest measurement errors). Statistica software was used to analyse and visualize measurement data.
    Źródło:
    Archive of Mechanical Engineering; 2019, LXVI, 1; 73-81
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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