Synthesis of a system for stabilizing the total cutting force of a metalworking lathe
A mathematical model for calculating the value of workpiece deviation is developed. Diagrams of transverse forces and bending moments in workpieces made of different materials under different cutting conditions is constructed. The influence of the cutting depth and longitudinal feed rate of a lathe on the workpiece axis deviation is analyzed. A structural diagram for calculating the cutting depth is synthesized taking into account workpiece bending in the transverse feed drive control system. A functional diagram of cutting force is considered. A mathematical description of the main motion drive is provided based on the elasticity of belt transmission, the transverse feed drive taking workpiece bending into account, and the longitudinal feed drive with elastic connections. A structural diagram for stabilization of the total cutting force, constructed in the MatLab and Simulink environments, is synthesized. This diagram includes the main motion drive taking belt transmission stretching into account and a neural controller with a reference model, the transverse feed drive taking workpiece bending into account, and the longitudinal feed drive with a neural controller with a reference model. Graphs of transient processes of the stabilization systems and cutting force are presented and analyzed. The structural diagram of cutting force stabilization, including the main motion drive taking into account belt transmission stretching and a neural controller with a reference model, the transverse feed drive taking workpiece bending into account, as well as the longitudinal feed drive with a neural controller with a reference model, ensures high static and dynamic characteristics of the drives.
Authors: M. P. Belov, O. A. Kundyukov, V. I. Korolev
Direction: Electrical Engineering
Keywords: dual-mass system, elastic drive belt, workpiece bending, elastic vibrations, subordinate control, neurocontroller
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