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Method for Three-dimensional Evaluation of Surface Form of Metal Rings for CVT Metal Pushing V-belts

Article of Honda R&D Technical Review Vol.21 No.1


In order to respond to the increased amounts of torque being transmitted by the metal pushing V-belts in CVTs, it was necessary to increase precision in the formation of the metal rings employed in the belts. This necessitated the achievement of a higher level of precision in the surface forms of the rings, a requirement that demanded the development of a three-dimensional surface form measurement technology enabling quantitative evaluation of the manufacturing processes and manufacturing history of the rings. While there is a standard method of evaluating the precision of the surface form of the rings in the direction of width, no integrated method of evaluating the continuous sectional form in the direction of the circumference has been available. The developed method uses general purpose laser sensors to gather continuous data on the sectional form of the rings, enabling reproduction of the three-dimensional surface form of the rings around the entire circumference. This has enabled quantification of the cyclic deviations in surface form that occur during the manufacturing process.


(1) Arikawa, M., Shima, H.: The Configuration Evaluation Technique for CVT Steel Belt Rings, Honda R&D Technical Review, Vol. 14, No. 2, p. 57-62
(2) Yagasaki, T., Aoyama, H., Harada, M., Harue, K., Umetsu, K.: Metal Pushing V-belt for Torque Convertertype CVT for 1.5-Litter Class Vehicles, Honda R&D Technical Review, April, 2008, p. 15-19
(3) Geometrical Product Specifications (GPS) –Surface texture : Profile method– Metrological characteristics of phase correct filters, JIS B0632
(4) Whitehouse, D. J.: Handbook of Surface and Nanometrology, Institute of Physics Publishing, p. 751-752 (2003)

Author (organization or company)

Kenta UMETSU(Automobile R&D Center)、Hiroyoshi MIKOGAI(Automobile R&D Center)

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