Abstract
The correlation between the service characteristics of the working surfaces of car parts belonging to the rotary body class, and quality parameters—in particular, the height-related roughness parameter Ra—was estimated. Low values of Ra were found to be unable to guarantee an optimal microrelief geometry and, accordingly, high-performance characteristics of the working surface. The oil-accumulation power of the parts was investigated as a primary characteristic of sliding friction using the group of Rk parameters in the Abbott–Firestone diagram, based on the profilogram of the test specimen’s surfaces. The oil-absorption power of the surfaces formed by different technological operations was compared with different microgeometric quality parameter values.
Highlights
One of the significant part classes in the machine-building industry nomenclature is the “rotary body” class
We considered the relationships between surface quality parameters and service characteristics during the performance of basic process operations of manufacturing for a hydraulic cylinder liner (Figure 3)
Based on the profilogram analysis of the surfaces studied, an Abbott–Firestone diagram (ISO 4287 1997) was constructed for the surfaces obtained after the finishing operation of burnishing (Figure 7), with the formation of a regular microrelief
Summary
One of the significant part classes in the machine-building industry nomenclature is the “rotary body” class. Parts belonging to this class (such as hydraulic cylinder liners of truck cranes, hydraulic cylinders of clutch control mechanisms, cylinders of car-turning mechanisms, cylinder liners of internal combustion engines, cones of variator transmissions, etc.) mainly work in conjunction with other parts and provide for the transmission of motion from one moving object to another [1,2,3]. Algorithms that help attain these predetermined service characteristics are proposed in [8,9] These algorithms can select the conditions and structures of the technological operations used in the machining of working surfaces of car parts
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