Gear metrology – An update

Goch, G.; Guenther, Anke; Yue, Peng; Ni, Kang

doi:10.1016/j.cirp.2023.05.008

Cited by 9 publications

(3 citation statements)

References 42 publications

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“…Additionally, during engagement helical gears contact over an entire tooth flank surface with a contact line at an inclination related to the helix angle and it may not be sufficient to use the harmonic content of single traces as a indicator of true performance. Although extension of standard evaluations from traces to areal data has been suggested [4,5] and described in an recent overview of state of the art along with measurement technologies required [6], the harmonic evaluation of gear flank surfaces has not been investigated significantly. Use of point cloud data and the use of the harmonic transforms was investigated in [7], with the inversion method being showcased in more detail in [8].…”

Section: Introductionmentioning

confidence: 99%

Characterisation and evaluation of the harmonic content of involute gear surface deviations

Reavie,

Frazer,

Przyklenk

et al. 2024

Eng. Res. Express

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Gears are fundamental precision components that are crucial to many industries, including the wind energy sector.They are traditionally analysed using profile and helix line measurements but this does not consider the majority of the contacting surface with intricate surface variations that dictate functional performance.Practical measurement and evaluation of involute gear surfaces remain underexplored.This paper uses the Fourier and wavelet transforms to evaluate measured gear surface deviation harmonic content for a single trace, a trace set, and surface analysis and describes the utility of each.The methods are first demonstrated with synthetic data and then with measured data, then the measured data is simulated in a quasi-static FE tooth contact analysis, which yields insights not solely gleaned from harmonic analysis.The uncertainty of harmonic content analysis is to be established in future work, but the uncertainty of the simulated functional performance may be a more useful metric for measurement.

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Section: Introductionmentioning

confidence: 99%

Characterisation and evaluation of the harmonic content of involute gear surface deviations

Reavie,

Frazer,

Przyklenk

et al. 2024

Eng. Res. Express

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“…Fine-pitch gears are both the core parts of major equipment and the basic parts of household products, and are widely used in automotive, aerospace, instrumentation, and other industries [1]. Measurement is an important means to analyze the sources of gear process errors and predict the quality of gear products [2][3][4][5][6]. Although domestic and foreign instrument companies have developed various precision measuring equipment that can be used for fine-pitch gears, the field of fine-pitch gear measurement still faces problems such as high measurement difficulty, low accuracy, low efficiency, and expensive instrument prices due to the small geometric size, high accuracy requirements, poor rigidity, and easy deformation of the fine-pitch gear.…”

Section: Introductionmentioning

confidence: 99%

Calibration Method Based on Virtual Gear Artefact for Computer Vision Measuring Instrument of Fine Pitch Gear

Wang,

Yao,

Shi

2024

Sensors

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The verification of the correctness, adaptability, and robustness of software systems in modern precision measurement instruments is of great significance. Due to the difficulty in processing and calibrating high-precision fine-pitch gear artefacts, the function verification and accuracy calibration of vision measurement instruments for the fine-pitch gear have become a challenge. The calibration method of the gear vision measurement system based on the virtual gear artefact involves two steps, namely obtaining and applying the virtual artefact. The obtained virtual gear artefact has the same geometric features, error features, and image edge features as the real artefact. The calibration method based on the virtual artefact can complete the correctness verification of the gear vision measurement system, and is superior to the traditional methods in adaptability verification, robustness verification, and fault analysis. In a test, the characteristic error of the virtual gear artefact could be reproduced with the original shape in the evaluation results of the computer vision gear measurement (CVGM) system, while the reproduction error did not exceed 1.9 μm. This can meet the requirements of the verification of the gear vision measurement software. The application of the virtual gear artefact can significantly improve the accuracy and robustness of the computer vision measuring instrument of the fine-pitch gear.

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“…Analytical measurement is mainly used to acquire pitch deviations, profile deviations, and helix deviations, which are mainly used to analyze the source of process error. Meanwhile, composite measurement is mainly used to judge whether the product is qualified [ 1 , 2 ].…”

Section: Introductionmentioning

confidence: 99%

Study on the Measurability of Gear Analytical Parameters in Double-Flank Measurement

Wang,

Liu,

Yao

et al. 2023

Sensors

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Double-flank measurement is the most commonly used full inspection method on the shop floor. However, the double-flank measurement method cannot measure analytical parameters such as pitch deviations and profile deviations, and this limitation is a pain point in the field of gear measurement. This paper studies the measurability of the analytical parameters of gears based on the results of double-flank measurement, proposes the definition of measurable area, and gives the relationship between the size of the measurable area and the number of teeth and the pressure angle and the gear error. Digital simulation methods were used to conduct measurement experiments on gear analytical parameters. In the experiments, the measurability of the analytical parameters of gears with various typical profile deviations in the double-flank measurement process was verified and analyzed. The test results show that not all profile deviations are unmeasurable in the process of double-flank measurement, but there exists a profile region in which the analytical parameters of the gear can be measured accurately. The size of the measurable area of the profile is mainly determined by the number of teeth and pressure angle of the gear, while the pitch deviations are always measurable under normal conditions.

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Gear metrology – An update

Cited by 9 publications

References 42 publications

Characterisation and evaluation of the harmonic content of involute gear surface deviations

Characterisation and evaluation of the harmonic content of involute gear surface deviations

Calibration Method Based on Virtual Gear Artefact for Computer Vision Measuring Instrument of Fine Pitch Gear

Study on the Measurability of Gear Analytical Parameters in Double-Flank Measurement

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