Temat: Coordinate Measuring Machine

Skocz do pozycji: 1.

Tytuł:: Identification and correction of coordinate measuring machine geometrical errors using lasertracer systems
Autorzy:: Gąska, A.
Gruza, M.
Gąska, P.
Karpiuk, M.
Sładek, J.
Tematy:: LaserTracer
coordinate measuring machine
geometrical error; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/103146.pdf Link otwiera się w nowym oknie
Opis:: LaserTracer (LT) systems are the most sophisticated and accurate laser tracking devices. They are mainly used for correction of geometrical errors of machine tools and coordinate measuring machines. This process is about four times faster than standard methods based on usage of laser interferometers. The methodology of LaserTracer usage to correction of geometrical errors, including presentation of this system, multilateration method and software that was used are described in details in this paper.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 2.

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
Tematy:: coordinate measuring machine
device
interim check; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/2051859.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Modernizacja współrzędnościowej maszyny pomiarowej typu MORA 3D
Modernisation of the MORA 3D coordinate measuring machine
Autorzy:: Praszkiewicz, M.
Rysiński, J.
Sidzina, M.
Tematy:: maszyna współrzędnościowa
pomiar
coordinate measuring machine
measurement; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/157368.pdf Link otwiera się w nowym oknie
Opis:: W ramach pracy wykonano modernizację maszyny pomiarowej typu MORA 3D, przystosowując ją do szybkiego pomiaru sprawdzianów kształtu. W tym celu wykonano interfejs komunikacyjny pomiędzy maszyną a komputerem oraz opracowano program komputerowy rejestrujący i obrabiający wyniki pomiarów. Oprogramowanie zawiera bazę obiektów mierzonych, co pozwala na szybkie wskazywanie punktów pomiarowych. Na tej podstawie automatyczne wyznaczane są osie mierzonych walców i punkty ich przecięcia. Otrzymane wyniki porównywane są z dokumentacją techniczną i przedstawiane w postaci raportu z pomiaru. Rozwiązanie takie pozwoliło na znaczne skrócenie czasu pomiaru oraz ograniczenie błędów powodowanych przez pracownika wykonującego pomiar. Dodatkowo, system umożliwia kalibrowanie końcówki pomiarowej na wzorcu kulistym.
The purpose of the work was modernisation of the MORA 3D coordinate measuring machine. The machine was adapted to fast measurements of shape. A communications interface enabling efficient connection between the machine and a computer was worked out. Moreover, a computer program recording and processing the measurement results was developed. The software contains a database of the measured objects, which allows for fast and precise choice of the measurement points. Based upon these points, the axes of the measured cylinders as well as their cross-section points are automatically determined. The obtained results are compared with the technical specifications and presented as a written report describing the measurements. The proposed solution shortens significantly the measurement time as well as reduces errors made by a personnel taking the measurements. Additionally, the system allows for calibration of a measurement tip on the ball-shaped contour master.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

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.
Tematy:: multivariate regression models
coordinate measuring machine
drift behaviour
calibration; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/221090.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 5.

Tytuł:: Improved calibration uncertainty assessment technique in coordinate metrology considering thermal influences
Autorzy:: Mussatayev, Meirbek
Huang, Meifa
Nurtas, Marat
Arynov, Azamat
Tematy:: coordinate measuring machine
coordinate metrology
uncertainty
quality control
thermal influence; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/2052177.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Coordinate measuring technology XXL
Autorzy:: Balle, B.
Tematy:: coordinate measuring machine
six-meter X and Y axis; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/132146.pdf Link otwiera się w nowym oknie
Opis:: The gap is increasing: ThyssenKrupp Rothe Erde manufactures increasingly large workpieces with ever smaller tolerances on behalf of its customers. Quality Assurance in Lippstadt, Germany, therefore sought out a precise system to measure the several-meter large components for offshore technology, large gears and tunneling machines – and convinced ZEISS to design a coordinate measuring machine with a six-meter X axis.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 7.

Tytuł:: Probe radius correction methods - review and comparison of existing methods
Autorzy:: Rak, A.
Woźniak, A.
Tematy:: coordinate measuring machine (CMM)
scanning probe
probe tip radius correction; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Powiązania:: https://bibliotekanauki.pl/articles/385250.pdf Link otwiera się w nowym oknie
Opis:: Scanning technology has been becoming more common then ever. Scanning offers new and effective possibilities of measurement. Nowadays planning, production and assembling without high accurate metrology is impossible. Measurement of small, curved elements became much easier with great development of mechanical components of measure machines, such as: guideways, transducers, bearings, servomechanisms. All this improvement made possible to collect with good accuracy points in high density. Algorithms, and computer software were greatly improved as well. Especially, many efforts were put on probe radius correction algorithms development. In this paper a review and a comparison of probe radius correction methods are shown.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 8.

Tytuł:: Measurement strategy as a determinant of the measurement uncertainty of an optical scanner
Autorzy:: Koteras, Robert
Wieczorowski, Michał
Znaniecki, Piotr
Swojak, Natalia
Tematy:: coordinate measuring machine
optical scanner
measurement strategy
accuracy of measurement; Pokaż więcej
Wydawca:: Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Powiązania:: https://bibliotekanauki.pl/articles/94194.pdf Link otwiera się w nowym oknie
Opis:: The subject of the article is an attempt to determine the impact of the applied measurement strategy on the accuracy of the measurement result. This problem is particularly crucial when measuring large objects. In these cases, it is not always possible to provide ideal conditions for the submission of particular scans. It is necessary to adjust the strategy to specific imposed conditions defined by the geometry of the object and to the time frame of the measurement itself. With regard to the above, an attempt was made to carry out a series of accuracy studies testing the structural light scanner while measuring elements of overall dimensions greater than the measuring capacity of the scanner. At the same time, various potential measuring strategies were simulated in practical applications. Our studies were conducted using a pre-designed test template with a defined distribution pattern of reference points and geometrical elements. Moreover, in order to make an in-depth investigation of the issue, some trials were undertaken with the use of limiting parameters. That means the scanner had both an excess and shortage of information required for a correct assembly of scans. Those scopes were taken into consideration in the study in order to use the acquired knowledge in practical measuring applications. Furthermore, conclusions from the conducted studies indicate peaks and troughs of respective measuring strategies with special care for determining relationships among the used strategies and the measuring accuracy parameters.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Model kinetyczny przetwornika pasywnych głowic skaningowych CMM
Kinetic model of CMM scanning passive probe transducer
Autorzy:: Krajewski, G.
Woźniak, A.
Tematy:: głowica skanująca
współrzędnościowa maszyna pomiarowa
CMM
scanning probe
coordinate measuring machine; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/155447.pdf Link otwiera się w nowym oknie
Opis:: W artykule przedstawiono analizę teoretyczną budowy przetwornika głowic skaningowych pasywnych stosowanych do pomiarów w technice współrzędnościowej. W efekcie podjętych prac autorzy otrzymali wstępny model dynamiczny pracy głowic, który może posłużć do kompensacji ich błędów powstałych na skutek zwiększenia prędkości pomiarowej.
Scanning probes, also known as measuring probes, are one of the most often used equipment of coordinate measuring machines (CMM) owing to ability of collecting large number of measuring points as well as taking fast measurements. High speed of measurements and high accuracy of the measuring system are two critical parameters deciding about the machine effectiveness. Dynamics is the most significant factor limiting the measurement accuracy. In most investigations of scanning CMM there is not separated the probing system performance from other sources of the machine errors, so the true error influenced by the probing system is not profoundly determined. This paper presents the scanning probe model regardless of the machine links. The worked out model allows for better understanding of the probing process with higher speed and optimising the measuring process. The future works will aim at proposing optimisation algorithms and applying them to the probing system as well as obtaining improvement in the accuracy.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 10.

Tytuł:: Acceptance and reverification of CMM in industrial conditions
Autorzy:: Koteras, Robert
Wieczorowski, Michał
Znaniecki, Piotr
Tematy:: Coordinate Measuring Machine
calibration
reverification
current inspection
współrzędnościowa maszyna pomiarowa
kalibrowanie
rewitalizacja; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/103264.pdf Link otwiera się w nowym oknie
Opis:: Nowadays, coordinate measuring machines (CMM) are featured by a great degree of complexity and high accuracy of manufacturing. During use of a machine, usually after periodical maintenance it is highly recommended to perform a verification test according to the same procedures as a standard verification test, including a difference that performance conformity is checked with user’s declaration. Periodical verification should be performed as often as it comes from a user’s experience and after every interference influencing mechanical and electronic systems of a CMM that could potentially cause a change in its accuracy parameters. The best solution is employing for that purpose an independent accredited laboratory that is featured by high competence and experience. In the paper rules of acceptance and periodical verifications are described, sources of measurement errors resulting from CMM imperfections are presented as well as examples of results for specific measurement devices installed in industry were shown.
Dostawca treści:: Biblioteka Nauki

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