Improving the accuracy and quality of mechanical machining with automatic control of the self-centering steady rest.

The paper considers the development that relates to machine-tool industry, in particular, to technological processes of cutting and surface plastic deformation of low-rigid parts with automatic control of a self-centering steady rest. The installation helps to control automatically the position of the shaft-type work piece axis and eliminate self-oscillations that occur when turning low-rigid ax symmetric parts. The paper states a new issue in the turning process. The position of the work piece axis is stabilized in the cutting zone in the ZOY plane, which makes it possible to increase the machining accuracy and cutting conditions. The controlled self-centering steady rest helps to process stepped parts with surface-plastic processing. The axial force is recorded applying a sensor installed on the steady rest lever, and is corrected using information about the opposite cutting zone. The installation is mounted on the machine support from the opposite cutting zone and is equipped with a four-circuit control system with a hydraulic steady feed drive. [ABSTRACT FROM AUTHOR]