Supplementary comparison EURAMET.L-S24 on involute gear standards

Kniel, Karin; Chanthawong, N; Eastman, N; Frazer, R C; Kupko, V.S.; Osawa, Shuji; Xue, Zhanao

doi:10.1088/0026-1394/51/1a/04001

Cited by 5 publications

(4 citation statements)

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“…The results were accepted as a key comparison and served as a mutual acceptance for the measurands among the national metrological institutes of Germany, USA and UK [23]. During the last few years, the PTB, at the proposal of the European Association of National Metrology Institutes (EURAMET), has led to two new interlaboratory comparisons to try to guarantee the compatibility of profile, helix and pitch measurements at international level [24,25]. Even so, these laboratories can only give limited traceability according to the standard artifacts they have and the usual parameters of gear measurement (profile, helix and pitch), quantifying the measurement uncertainty according to ISO 18653:2003 [17].…”

Section: Calibration and Traceabilitymentioning

confidence: 99%

Measuring Sensors Calibration in Worm Gear Rolling Testers

Pueo

Acero

Gracia

et al. 2020

Sensors

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The ISO standard regulating gear-rolling measurement does not specify in detail the calibration and verification procedures for this type of equipment. This may be one of the reasons for the lack of reproducibility in these rolling tests. The uncertainty budget method, which is the most appropriate way to know the accuracy of this dynamic measurement, shows that the measuring sensors’ accuracy is only a part of the total measurement process uncertainty. In this work, a new calibration and verification procedure for a worm gear rolling tester is presented, based on machine tool, coordinate measuring machine and gear measuring instruments’ calibration techniques. After compensating numerically for the measuring instruments, it has been evaluated how the error components of each movement affect the meshing point, a fundamental factor to ensure a good gear transmission. The study shows that there are unintentional position variations, not detected by the measuring sensors, that have to be identified and quantified in the calibration for their later inclusion in the uncertainty budget. In this way, the measurement uncertainty could be reduced, and thus improve the reproducibility of these testers, as a preliminary stage to the development of optimized rolling measurement equipment to solve current limitations.

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Section: Calibration and Traceabilitymentioning

confidence: 99%

Measuring Sensors Calibration in Worm Gear Rolling Testers

Pueo

Acero

Gracia

et al. 2020

Sensors

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“…To transfer the value of involute more accurately and stably, the GIA is expected to have submicron profile slope deviation and profile form deviation. The profile deviations of GIAs for international measurement comparison used by national institutes of metrology are about 0.5-3.0 µm [1][2][3][4], these GIAs represent the leading level of gear involute machining in various countries.…”

Section: Introductionmentioning

confidence: 99%

Adjustment for profile deviations of gear involute artefacts

Ling¹,

Ling²,

Yu³

et al. 2023

Meas. Sci. Technol.

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Gear involute artifact (GIA) is a kind of measurement standard for calibrating the gear involute measuring instrument. To reduce the profile form deviations and the difference of the profile slope deviations between the opposite flanks (left and right flank) of GIA, the effect of installation eccentricity on the profile deviations is analysed, and an adjustment method for profile deviations of GIA by the eccentric installation is proposed. The difference of profile slope deviations between the opposite flanks of GIA with designed base circle radius r b=100 mm changes from 0.31 μm to 0.1 μm after the adjustment through the eccentricity of the mandrel itself. The difference of profile slope deviations between the opposite flanks of GIA with designed base circle radius r b=60cos20° mm changes from 0.77 μm to 0.12 μm after the adjustment through a kind of rotary stroke bearing with eccentricity, meanwhile, the profile form deviations are reduced from 0.53 μm to 0.34 μm (right flank) and 0.89 μm to 0.46 μm (left flank). This adjustment method could improve the used accuracy of GIA without improving the machining accuracy of the involute and changing the measurement process of the measurement standard of GIA.

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“…25 mm and a profile form deviation of approx. 0.8 μm within an evaluation length of 17 mm in the international comparison project EURAMT.L-S24 [4]. PTB [5,6] has also developed, in cooperation with Hofler and others, a large involute gear segment measurement standard with base radii of approx.…”

Section: Introductionmentioning

confidence: 99%

Gear involute artifacts with sub-micron profile form deviations: manufacture and new design

Ling,

et al. 2023

Metrology and Measurement Systems

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Gear involute artifact (GIA) is a kind of calibration standard used for traceability of involute metrology. To machine GIAs with sub-micron profile form deviations, the effect on the involute profile deviations caused by the geometric deviations and 6-DoF errors of the machining tool based on the double roller-guide involute rolling generation mechanismwas analysed.At the same time, a double roller-guide involute lapping instrument and a lapping method for GIAs was proposed for lapping and in-situ measuring the gear involute artifacts. Moreover, a new GIA with three design base radii (50 mm, 100 mm, and 131 mm) was proposed for more efficient calibration and was machined with profile form deviations of 0.3 μm (within evaluation length of 38 mm, 68 mm, 80 mm, respectively, measured by the Chinese National Institute of Metrology), and the surface roughness Ra of the involute flanks was less than 0.05 μm. The research supports small-batch manufacturing for high-precision GIAs.

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Supplementary comparison EURAMET.L-S24 on involute gear standards

Cited by 5 publications

References 0 publications

Measuring Sensors Calibration in Worm Gear Rolling Testers

Measuring Sensors Calibration in Worm Gear Rolling Testers

Adjustment for profile deviations of gear involute artefacts

Gear involute artifacts with sub-micron profile form deviations: manufacture and new design

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