Improving lathe dynamics by workpiece -support subsystem control

Abstract

The article discusses the design of the lathe, the peculiarity of which is the equipment of it with three automatic control systems (ACS) of the workpiece-support subsystem. The first ACS ensures the stability of the workpiece axis during machining by controlling the self-centering supports (SCS). The second ACS controls the dynamics of the spindle assembly. The third ACS controls the axial clamping of the rear center, which enables machining low rigid small, long shaft-type workpieces for turning, grinding and milling spline slots. The use of ACS increases the accuracy, quality of machining and vibration resistance of the Lathe -Device -Tool -Workpiece (LDTW) system, which is achieved in all operations through automatic control of tool positions and the workpiece. In addition, the residual stress on the machined surfaces is reduced by introducing high-frequency vibrations into the cutting area at all operations.