Abstract
Crossed helical gears are used in cars and many household appliances. The trend towards increased comfort in motor vehicles has led to the utilization of more than a hundred servo-drives in luxury class automobiles. Important advantages of crossed helical gears are their easy and inexpensive design, good noise performance and high ratio that can be realized in one step. Sintered steel is a very favorable material for wheels in crossed helical gears. The hardening obtained after the sinter process will affect the microstructure of the sintered steel, so that the wear load capacity can increase to higher values. This report shows results of iron-based sintered material Fe1.5Cr0.2Mo in the case of crossed helical gears concerning wear resistance and other damage types under different speed, torque and lubricants. As material variants, samples with additional treatment, such as pyrohydrolysis, case hardening, shot peening, sinter-hardening, and 2 % copper addition, are used. The calculation method is given for the determination of wear load capacity of the worm with a helical gear made of Fe1.5Cr0.2Mo sintered steel with sinter-hardening treatment. These results provide product developers with the first important clues for indicators for calculation of the worm with a helical gear. The paper also presents an analytical and FEA procedure for determination of coefficient of friction in meshing zone of crossed helical gears. Obtained results from numerical simulation were compared with experimentally obtained results.
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Miltenović, A. (2016). Damage Types, Load Capacity and Efficiency of Crossed Helical Gears with Wheels from Sintered Steel. In: Goldfarb, V., Barmina, N. (eds) Theory and Practice of Gearing and Transmissions. Mechanisms and Machine Science, vol 34. Springer, Cham. https://doi.org/10.1007/978-3-319-19740-1_10
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DOI: https://doi.org/10.1007/978-3-319-19740-1_10
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