Genauigkeitssteigerung bei Messungen in Zweiflankenanlage

Wedmann, Achim; Kniel, Karin; Krah, Thomas; Härtig, Frank

doi:10.1515/teme-2014-1034

Cited by 3 publications

(3 citation statements)

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“…One relates to the sophisticated method of self-centering probing in double-flank contact. Although special artifacts have been designed for this type of probe characterization, the reproducibility is still much lower when compared to single-flank probing [33]. The second drawback obviously arises from the fact that the screw threads are only inspected in two axial sections.…”

Section: Classical Screw Thread Metrologymentioning

confidence: 99%

A Unified Theory for 3D Gear and Thread Metrology

2021

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We propose a unified theory for the metrological treatment of helical machine elements such as cylindrical and conical gears, worms, and screw threads. The main idea is to introduce a universal 3D geometry model for threaded components that provides for distinct parameterization using a unique set of geometry parameters and that offers and a functional description of the transverse profile. Using modern 3D coordinate measuring technology, a holistic evaluation algorithm yields the actual geometry as the result of a high dimensional best-fit procedure and form deviations as corresponding residuals. All determinants and evaluation parameters can then be calculated from the set of actual geometry parameters. By applying certain constraints to the model to be fitted, the novel method can be reduced to the established 2D methods and hence meets demands for the comparison of the two procedures. The results of the novel approach have proven to be very stable and they enable the evaluation of areal measurements with no loss of information.

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Section: Classical Screw Thread Metrologymentioning

confidence: 99%

A Unified Theory for 3D Gear and Thread Metrology

2021

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“…The measurement setup differs largely from a conventional setup because it is assembled on a plate. • Profile angle measurement standard, PTB [5]: The focus of this measurement standard is the use of optical sensors for the measurement of microgears. The workpiece features teeth that have different profile angles on a gear rack to ensure accessibility by the optical sensors (0.5 mm module, profile angles ranging from 0°-30°).…”

Section: Measurement Science and Technologymentioning

confidence: 99%

“…Gears with a 0.1 mm module were not measured with the µCMM because the sphere diameter of 125 µm was too large for probing. However, measuring systems with smaller probing sphere diameter [22,23,28,29] or measuring methods like CT [5] are able to characterize the 0.1 mm module. We successfully performed a CT scan of the titanium version yielding gear parameters for all modules.…”

Section: Calibration Process and Parametersmentioning

confidence: 99%

Novel measurement standard for internal involute microgears with modules down to 0.1 mm

Jantzen

Neugebauer

Meeß

et al. 2018

Meas. Sci. Technol.

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Involute microgears are important components used in industrial applications. Quality control benefits from enhanced, monitored measurement processes. Workpiece-like measurement standards help to verify measurements and estimate measurement uncertainties by comparing the geometrical values measured with the calibration values. To address the need for reliable, traceable gear standards on the microscale, Germany’s national metrology institute, the Physikalisch-Technische Bundesanstalt, has developed the first internal involute microgear measurement standard with modules between 0.1 and 1 mm. We manufactured two versions with different materials (titanium and carbide) by means of wire electrical discharge machining. Profile and flank deviations were calibrated with sub-micrometer uncertainty by means of tactile scanning measurements using a micro coordinate measuring machine. This paper features information on the design, manufacturing, and calibration processes, including a detailed measurement uncertainty budget.

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3D Involute gear evaluation – Supplement: Measurements in double-flank contact

Stein

Härtig

2021

Measurement

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Genauigkeitssteigerung bei Messungen in Zweiflankenanlage

Cited by 3 publications

References 0 publications

A Unified Theory for 3D Gear and Thread Metrology

A Unified Theory for 3D Gear and Thread Metrology

Novel measurement standard for internal involute microgears with modules down to 0.1 mm

3D Involute gear evaluation – Supplement: Measurements in double-flank contact

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