A study on the four-section pitch measurement method on the deviation of characteristic parameters of herringbone gears
DOI:
https://doi.org/10.24425/mms.2025.154678Abstract
To enhance measurement efficiency for herringbone gear deviations, this study leverages the fundamental principle of tooth surface generation through helical and involute line families to systematically establish a mathematical model of tooth surface incorporating Herringbone Gear Characteristic Vertex-P (HGCV-P) parametric deviations. Based on this foundation, an innovative four-section tooth pitch method was proposed for HGCV-P deviation measurement, and a corresponding measurement system was developed. First, two cross-sections (within the evaluation range) on the upper gear for tooth pitch measurement should be selected, then the same method applied to measure two cross-sections on the lower gear; finally, the measured points are transformed into a two-dimensional coordinate system through coordinate transformation to calculate the HGCV-P deviation. The experimental results demonstrate the total HGCV-P centring deviation 𝐹𝑝 = 0.0288 and the mean HGCV-P deviation 𝐹𝑝𝑆 = 0.0243, showing fundamental consistency with the results [19]. The research findings elucidate the correlation between HGCV-P deviations and the transmission stability of herringbone gears, providing critical information for gear optimisation design. Furthermore, the proposed HGCV-P measurement protocol significantly enhances the inspection efficiency of herringbone gears, establishing a novel inspection methodology to advance manufacturing precision.References
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