| Citation: | CHEN Hongfang, LIANG Chaowei, LI Baoshan, et al. Working principle of novel double-axis arc-shaped large-size involute artifact[J]. Journal of Beijing University of Aeronautics and Astronautics, 2022, 48(1): 1-7. doi: 10.13700/j.bh.1001-5965.2020.0515(in Chinese)
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Due to the difficulty of machining large-size involute artifact, it is even more difficult to measure, and as a result, the transmission of values in large gears has always been a problem. In this paper, an arc is used instead of involute tooth profile to construct a new type of large-size involute artifact—the double-axis arc-shaped large-size involute artifact. The principle of the new large-size involute artifact is introduced, the design method of the artifact is studied, the principle error model of the artifact is established, the single error of the gear measuring instrument which can be evaluated by the double-axis arc-shaped large-size involute artifact is proposed, and the method of evaluating the tooth surface deviation measuring performance of the gear measuring instrument by using the artifact is presented. In order to verify the feasibility, an artifact for testing principle was processed, and the experimental results show that the measured principle error curve of the processed double-axis arc-shaped large-size involute artifact is consistent with the overall trend of the theoretical principle error curve, which is hump-shaped, proving the accuracy and feasibility of the establishment of the principle error model of the artifact. The magnitude of the entire assessment deviation curve is 45.5 μm within the assessment range, corresponding to a resulting pressure angle error of 1.34 μm /rad. The experimental results also demonstrate the correctness of the arc selection criterion, the design model of center distance and the design model of arc radius for the double-axis arc-shaped large-size involute artifact. The paper provides theoretical support for establishing the value transfer of the large gear.
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