Temat: roundness - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Assessing the accuracy of a computerized roundness profile measuring instrument used under industrial conditions
Ocena dokładności skomputeryzowanego przyrządu do pomiaru profilu okrągłości w warunkach przemysłowych
Autorzy:: Adamczak, S.
Janusiewicz, A.
Tematy:: metrology
roundness
statistical analysis; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/152552.pdf Link otwiera się w nowym oknie
Opis:: The paper compares the accuracy of a computerized instrument using the CYFORM software with that of a traditional instrument for measuring roundness profiles equipped with an analogue dial gauge. The results for the two instruments were compared with those obtained by a standard Taylor-Hobson TALYROND 73. The work discusses the procedures of the statistical analysis of the experimental method error and the accuracy of the instruments tested.
W niniejszym artykule przedstawiono porównanie wyników uzyskanych za pomocą przyrządu do pomiaru zarysów okraglości w urządzeniach technologicznych w wersji tradycyjnej tj. wyposażonej w analogowy czujnik zegarowy, ze skomputeryzowanym przyrządem pomiarowym działającym przy użciu oprogramowania CYFORM. Porównania dokonano względem urządzenia wzorcowego TALYROND 73 firmy Taylor-Hobson. Przedstawiono procedury testowania statystycznego eksperymentalnego błędu metody. Ustalono i podano dokładność testowanych urządzeń oraz na ich podstawie sformulowano wnioski.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 2.

Tytuł:: Analyzing the variations in roundness profile parameters during the wavelet decomposition process using the MATLAB environment
Autorzy:: Adamczak, S.
Makieła, W.
Tematy:: mother wavelet
Fourier transform
wavelet transform
surface texture
surface roundness
roundness profile parameters; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/221022.pdf Link otwiera się w nowym oknie
Opis:: Signal analysis performed during surface texture measurement frequently involves applying the Fourier transform. The method is particularly useful for assessing roundness and cylindrical profiles. Since the wavelet transform is becoming a common tool for signal analysis in many metrological applications, it is vital to evaluate its suitability for surface texture profiles. The research presented in this paper focused on signal decomposition and reconstruction during roundness profile measurement and the effect of these processes on the changes in selected roundness profile parameters. The calculations were carried out on a sample of 100 roundness profiles for 12 different forms of mother wavelets using MATLAB. The use of Spearman's rank correlation coefficients allowed us to evaluate the relationship between the two chosen criteria for selecting the optimal mother wavelet.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 3.

Tytuł:: New trends in design of instruments for measurements of roundness and cylindricity
Autorzy:: Stępień, K.
Tematy:: roundness
cylindricity
measurement
radial method; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/132109.pdf Link otwiera się w nowym oknie
Opis:: The paper deals with modern systems for roundness and cylindricity measurements. It gives the classification of methods for roundness and cylindricity measurement and it describes more precisely the radial method. Fundamental part of the paper is presentation of measuring abilities of Talyrond 365. In the summary a brief comparison between of and new systems for cylindricity measurements are given.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Measurement System for Assesment of Motor Cylinder Tolerances and Roundness
Autorzy:: Jermak, C. J.
Dereżyński, J.
Rucki, M.
Tematy:: precision
measurement
accuracy
roundness
automation; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/220758.pdf Link otwiera się w nowym oknie
Opis:: The paper describes the concept of a novel measurement system designed for quick and inexpensive measurement of tolerances and assessment of roundness, especially suitable for the motor industry. The structure of measurement system and its algorithm of measurement data analysis are described in detail. The system underwent tests with the setting (master) rings of known tolerances and out-of-roundness. The results were compared with those obtained from the reference device PIK-2. The tested system exhibited a very good accuracy and proved to be a good measurement tool. It was implemented in the industrial enterprise.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 5.

Tytuł:: The effect of shape and roughness on flotation and aggregation of quartz particles
Autorzy:: Guven, Onur
Tematy:: quartz
grinding
abrasion
morphology
roundness; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/2175446.pdf Link otwiera się w nowym oknie
Opis:: A combination of grinding and abrasion processes was applied to control the shape and roughness of quartz particles to investigate their roles in flotation recoveries and aggregation rates at different collector concentrations. The results showed that while the roundness values (Ro) of quartz particles varied in the range of 0.56-0.58 (Ro) at 480 and 1920 sec grinding, the roughness values of particles varied between 3.12-4.02 μm at 60 and 240 min abrasion. The flotation and aggregation tests showed while the flotation recovery increased from 31.3 % to 34.2 % in reverse proportion to their roundness values at 1x10-6 M DAH concentrations, a similar increasing trend from 34.1% to 38.1 % as a function of their roughness value from 3.12 μm to 4.02 μm. On the other hand, in the case of aggregation tests, while the turbidity values decreased from 40.6 NTU to 32.1 NTU at 1x10-6 M DAH concentrations for rounder particles, it was found as 36.2 NTU to 31.8 NTU for rougher ones. The overall results of this study indicated that tuning the morphology of quartz particles may be used to adjust both the flotation and aggregation rate of particles.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 6.

Tytuł:: Nowe ujęcie matematycznego zapisu zarysu okrągłości przy podparciu dwupryzmowym
A new approach to mathematical description of roundness shape by two-prism support
Autorzy:: Nozdrzykowski, K.
Tematy:: pomiary
zarys okrągłości
measurements
roundness shape; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/157956.pdf Link otwiera się w nowym oknie
Opis:: W artykule przedstawiono nowe ujęcie matematycznego zapisu zarysu okrągłości odpowiadające pomiarom cylindrycznych elementów maszyn podpartych w dwóch pryzmach. W oparciu o opracowany schemat pomia-rów odniesieniowych, uwzględniający związki kątowe pomiędzy promie-niem zarysów okrągłości wyprowadzone zostały wzory mające zastoso-wanie w symulacyjnych obliczeniach mierzonej odchyłki okrągłości Dz3 oraz wartości współczynnika wykrywalności kn3.
In the paper was shown a new approach to mathematical description of roundness shape corresponding to measurements of cylindrical machinery parts supported onto two prisms. Basing on reference measurement schema, taking in regard angular relations between radius of roundness shape, the formulae used in simulating computations of measured roundness deviation Dz3 as well as detectability coefficient kn3 were presented.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 7.

Tytuł:: The models for the comparison of roundness profiles
Autorzy:: Tichá, S.
Adamczak, S.
Tematy:: roundness
correlation coefficients
mathematical models
comparison; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Powiązania:: https://bibliotekanauki.pl/articles/384343.pdf Link otwiera się w nowym oknie
Opis:: Roundness is one of the mostly frequently observed geometrical deviations. A profile of a machine part consisting of simple harmonic courses or their sums depends on a number of factors. Modeling of geometrical deviations requires applying the Fourier to extend each periodical function into an infinite series of harmonic components. Using of harmonic analysis we are able to determine the values of amplitudes of single components and their phase shifts. These parameters can be used for example for comparison of roundness profiles by means of correlation coefficients. The obtained correlation coefficients are concrete parameters, on the basis of which it is possible to determine the degree of conformity and unity between the compared profiles. The comparison of evaluated roundness profiles can be represented as mathematical statistical models. In these models is detected sequence of single steps, which are necessary for determination of required correlation coefficients [1, 2] .
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 8.

Tytuł:: Statistical validation of the method for measuring radius variations of components on the machine tool
Autorzy:: Adamczak, S.
Janusiewicz, A.
Makieła, W.
Stępień, K.
Tematy:: roundness
experimental method error
process tool; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/221018.pdf Link otwiera się w nowym oknie
Opis:: This paper deals with the experimental validation of the suitability of the method for measuring radial variations of components on the process tool. The tests were conducted using a computerized PSA6, which was compared to a Talyrond 73. The results of measurement of roundness deviations as well as roundness profiles were analyzed for a sample of 70 shafts. The roundness deviations were assessed by determining the experimental errors, while the profiles obtained with the tested device were compared to those registered by the reference device using three correlation coefficients.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 9.

Tytuł:: Morphological changes of glass bead particles upon an abrasive blasting as characterized by settling and flotation experiments
Autorzy:: Behzad, Vaziri Hassas
Güven, Onur
Baştürkcü, Esra
Çelik, Mehmet S.
Tematy:: roundness
flotation
settling rate
energy barrier; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/1448218.pdf Link otwiera się w nowym oknie
Opis:: The recent developments in mineral processing led researchers to look for alternative methods and propose new mechanisms for enhancing the efficiency of relatively costly processes (e.g., flotation, aggregation), where especially dealing with fine particles. Finer the particles, the higher the role of their surface on their behavior and properties. The importance of particle morphology becomes even clearer when particle-particle and particle-bubble interactions are considered. In this study, the effect of particle shape “roundness” on the surface wettability and flotation response was investigated upon producing fine particles with the “abrasion blasting” method. In order to provide a fundamental perspective, adsorption measurements were also carried out along with the flotation experiments under the same conditions. In addition to these, zeta potential measurements were also carried out with both spherical and blasted particles as a function of collector concentration. The results suggested that the roundness of particles decreased up to a certain nozzle pressure value, which was followed by higher adsorption degrees and consequently higher flotation recoveries. Additionally, settling rate tests were also performed with very fine material to show the effect of particle morphology on particle-particle interactions. The results showed that while lower settling rate values were obtained for spherical ones, higher values were obtained in the case of the ground and blasted samples in the presence of DI water. It was concluded from this study that the “Abrasive blasting method” could be an effective alternative for tuning the surface morphology of particles and their wettability, which in turn can affect the particle interactions in the system.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 10.

Tytuł:: Separation Of Non-Periodic And Periodic 2D Profile Features Using B-Spline Functions
Autorzy:: Janecki, D.
Cedro, L.
Zwierzchowski, J.
Tematy:: profile filtering
B-spline functions
roundness
roughness; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/221820.pdf Link otwiera się w nowym oknie
Opis:: The form, waviness and roughness components of a measured profile are separated by means of digital filters. The aim of analysis was to develop an algorithm for one-dimensional filtering of profiles using approximation by means of B-splines. The theory of B-spline functions introduced by Schoenberg and extended by Unser et al. was used. Unlike the spline filter proposed by Krystek, which is described in ISO standards, the algorithm does not take into account the bending energy of a filtered profile in the functional whose minimization is the principle of the filter. Appropriate smoothness of a filtered profile is achieved by selecting an appropriate distance between nodes of the spline function. In this paper, we determine the Fourier transforms of the filter impulse response at different impulse positions, with respect to the nodes. We show that the filter cutoff length is equal to half of the node-to-node distance. The inclination of the filter frequency characteristic in the transition band can be adjusted by selecting an appropriate degree of the B-spline function. The paper includes examples of separation of 2D roughness, as well as separation of form and waviness of roundness profiles.
Dostawca treści:: Biblioteka Nauki

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