Abstract
Interference joint is one of the most advanced assembly methods for camshaft. The joining force in the assembly process and the connection strength after assembly are the key aspects of the camshaft assembly system. In this paper, the mechanism of joining force and connection strength are analyzed from two aspects of elasticity and plasticity using thick-wall cylinder model. Joining and torsion experiments are done to determine the joining force and connection strength. Joining forces fluctuating increase in the joining process, which is composed by friction force Fs and shearing force Ff. Fs is 0.87 KN, and Ff is 6.23 KN when the assembly interference is 0.15mm. Joining force linear increases with the interference, and torque exponential increases with it. The empirical formulas between the torque capacity, joining force, and interference of the camshaft are provided by the experiment results. The assembly interference limit of 0.3mm is estimated for the case of this paper. Metallographic observation reveals the changes of metal flow line of the knurled tube. The top of knurled tooth turns over and an inverted triangle formed after joining process.
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The datasets used or analyzed during the current study are available from the corresponding author on reasonable request.
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This work was funded by the Natural Science Foundation of Shandong Province (No. ZR2016EEP04).
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The author contributions are as follows: Xiaoming Huang was in charge of the whole trial and designed the study; Xiaoming Huang and Wentao You wrote and edited the manuscript; Weitao Sun and Yuqian Wang assisted with sampling and laboratory analyses; Xiaoliang Liu and Yucan Wang provided guidance and discussion in theory; Jin Xing and Hailin Bi performed the experiments. All authors read and approved the final manuscript.
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Huang, X., Sun, W., Liu, X. et al. Analysis on the interference assembly of camshaft with knurled tube and cam. Int J Adv Manuf Technol 117, 961–969 (2021). https://doi.org/10.1007/s00170-021-07783-z
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DOI: https://doi.org/10.1007/s00170-021-07783-z