Abstract
Modeling and Dynamic Characteristic Analysis of a Ball Screw Feed Drive System Based on Receptance Coupling
Highlights
A ball screw feed drive system is extensively used in machine tools
A self-developed ball screw feed drive system is selected to study the influence of worktable position, worktable mass, and screw lead on the dynamic characteristics of the ball screw feed drive system
In order to solve the problem that the existing receptance coupling method cannot model the worktable of single-axis feed drive system, we proposed a new substructure division method according to the application of lumped parameter model in the ball screw feed system
Summary
A ball screw feed drive system is extensively used in machine tools. Reliable theoretical modeling and dynamic characteristic analysis of such a system are vital for the performance research and subsequent design of machine tools [1, 2]. In the modal shape analysis of the abovementioned research, the modal shape of the feed drive system is reflected as the modal shape of the axial and torsional vibrations of the ball screw. The vibration mode of the ball screw through the modal shape curve of axial or torsional vibration is difficult to determine. Research on the modeling and dynamic characteristic analysis of ball screw feed drive systems by receptance coupling is scarce. A modeling method based on a new substructure division method is proposed for the problem that the single-axis feed drive system cannot be modeled by the existing receptance coupling. Given that the vibration modes cannot be determined using the modal shape curve of ball screw feed drive systems, the modal analysis method based on the assembly state is proposed. This study uses a test bench for a ball screw feed drive system as an example to study and analyze the first four vibration modes of the feed drive system through the proposed method
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