Flexspline Pitch Deviation Rapid Measurement Method Using Offset Point Laser Sensors

• Published in: Machines (Basel) Vol. 12; no. 6; p. 381
• Main Authors: Wang, Xiaoyi, Zheng, Kunlei, Xiao, Longyuan, Zhao, Chengxiang, Liu, Mingkang, Zhu, Dongjie, Yao, Tianyang, Shi, Zhaoyao
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.06.2024
• Subjects: Accuracy; Calibration; Coordinate transformations; Deviation; flexspline; gear rapid measurement; Gear teeth; Lasers; Light; Measurement; Measurement methods; Methods; pitch deviation; point laser sensors; pose calibration; Sensors
• ISSN: 2075-1702; 2075-1702
• DOI: 10.3390/machines12060381

Flexsplines in harmonic gear reducers are usually characterized by a large number of teeth, small modulus, and poor stiffness, which makes them difficult to measure using conventional gear measuring centers. In order to efficiently evaluate the quality of flexsplines in harmonic gear reducers, a rapid measurement method for flexspline pitch using offset point laser sensors (PLS) is proposed. This paper investigates the principle of measuring the tooth flank of the flexspline under the offset of the PLS, establishes a model for collecting and analyzing gear surface data, builds an experimental system, calibrates the six pose parameters of the sensor using the geometric features of the flexspline’s outer circular surface, and completes the reconstruction of the left and right gear surfaces of the flexspline based on the measured data. In the experiment, the gear surface obtained by the proposed method is largely consistent with that measured by the video imaging method, and the repeatability of both single pitch deviation and cumulative pitch deviation is within ±3 µm.