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1

Simplifications of the volumetric error model because of the structural loop of machine tools

Majda Paweł, Jastrzębska Joanna

Archives of Mechanical Technology and Materials

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2019

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Vol. 39

11--15

EN

After many years of intensive work the international experts from ISO TC 39 published the technical report called ISO TR 16907 "Machine tools - numerical compensation of geometric errors". This document defines the terminology, presents benefits and limitations of numerical compensation of machine tools' and measuring machines' errors. It gives machines manufacturers and users vital information about how to use numerical compensation. In the context of those types of compensation defined in ISO TR 16907, this article shows rules of selecting models of Volumetric Error for three-axis machine tools. What is more, this paper presents some principles of reduction of these proposed models because of the functional tasks for machine tools. One of the obtained results is an array of reduced models for three-axis machine tools. This array determines the degree of detail of the model and the experimental research program that needs to be carried out in order to determine the Volumetric Error distribution.

2

Praktyczne aspekty doboru modelu numerycznej kompensacji błędów geometrycznych obrabiarek

Majda P., Jastrzębska J.

Mechanik

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2018

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R. 91, nr 11

980--983

PL

Po wielu latach intensywnej pracy międzynarodowi eksperci z ISO TC 39 opublikowali raport techniczny ISO TR 16907 “Machine tools – numerical compensation of geometric errors”. Dokument ten definiuje terminologię oraz przedstawia korzyści i ograniczenia dotyczące numerycznej kompensacji błędów obrabiarek i maszyn pomiarowych. Producenci i użytkownicy maszyn uzyskali więc ważne informacje na temat zastosowania kompensacji numerycznej. W kontekście zdefiniowanych w ISO TR 16907 typów kompensacji w tym artykule przedstawiono zasady doboru modeli błędów przestrzennego pozycjonowania dla trójosiowych obrabiarek skrawających. Omówiono też zasady redukcji tych modeli ze względu na zadania funkcjonalne stawiane obrabiarkom. Zaprezentowano tablicę modeli zredukowanych dla trójosiowych obrabiarek. Determinuje ona stopień szczegółowości modelu i programu badań doświadczalnych, jakie należy przeprowadzić w celu wyznaczenia przestrzennego rozkładu błędu pozycjonowania.

EN

After many years of intensive work, experts from ISO TC 39 have published the technical report ISO TR 16907 “Machine tools – numerical compensation of geometric errors”. This document defines the terminology, presents advantages and limitations of numerical compensation of machine tool and measuring machine. This gives machine manufacturers and users important information on the application of numerical compensation. In the context of the compensation types defined in ISO TR 16907, presented principles of selecting volumetric error models for three-axis machine tools. The principles of reducing these models due to the functional tasks of machine tools were also presented. The final result is a table of reduced models for three-axis machine tools. It determines the degree of the model and the experimental test program, which should be done to determine volumetric error.

3

Numerical Compensation of Air Absorption of Sound in Scale Model Measurements

Ćirić D. G., Pantić A.

Archives of Acoustics

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2012

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Vol. 37, No. 2

219-225

EN

The absorption of sound in air represents one of the main problems of the scale model measurements. This absorption, especially at higher frequencies, is considerably greater than the value determined by the law of acoustical similarity between the full scale and the scale model. Different alternatives are applied for compensation of the excess air absorption including a numerical compensation. In this paper, a modified approach to numerical compensation is proposed. It is based on compensation of the sound decay only, and not background noise. As a consequence, there is no an increase of background noise in the compensated impulse response. The results obtained by the proposed procedure are compared to the corresponding ones obtained by the other procedures.