Research Status Of Foreign Research On Dynamic Characteristics Of Ball Screw Feed System

Due to the blockade of the core technology abroad, there are relatively few research literatures on the ball screw feed system abroad. It mainly includes the following aspects:

In terms of the influencing factors of the kinematic characteristics of the feed system, M. Ebrahimi, R. Whalley analyzed, modeled and simulated the stiffness of the feed system of the machine tool, gave the calculation formula of the stiffness of the feed system, and verified the stiffness of the feed system. The influence of friction, backlash and table quality on the table feed of the feed system.

In terms of finite element modeling, Zaeh, M.F. from the Technical University of Munich in Garching, Germany, analyzed and optimized the dynamic characteristics of the ball screw feed system, and gave a structural modeling method. The finite element modeling of the feed axis is carried out, and the characteristics of the position and velocity loops are simulated at the same time. Zaeh, Michael F. of the University of Stuttgart derived the stiffness matrix of the ball screw feed system to replace the contact stiffness model of the ball and raceway in the contact area of the screw nut, and used the spring model to simulate the interaction between the screw and the nut. , through the centralized finite element model, the joint modeling and vibration analysis of the entire machine tool structure including the ball screw feed system are carried out, and the feed drive test bench is used to verify the correctness of the modeling method.

Choi, Y.H, Changwon University, Korea. et al studied the vibration analysis of the ball screw feed system under the condition of high speed, used the 6-degree-of-freedom lumped parameter model to analyze the plane vibration of the feed system, deduced its motion equation, and analyzed the natural frequency of the system and the speed control of the drive motor. The resulting transient responses were entered and validated through experimental model analysis of a ball screw feed system and using vibration measurements.

Sato, Ryuta describe a new approach to modeling and controller tuning of feed systems. A model of the feed system is established through the two-degree-of-freedom vibration model, and various motions are simulated and verified by experiments. Tsutsumi, Masaomi et al. established a new multi-degree-of-freedom model including a worktable, a ball screw nut pair and a support bearing, and verified it through experiments.

To sum up, the research on the dynamic characteristics of the machine tool feed system abroad mostly focuses on the influencing factors of kinematic characteristics and dynamic modeling. The finite element method is generally used to analyze the dynamic characteristics of the machine tool feed system. Machine tool development and research. However, there are few relevant literatures on considering the influence of the dynamic characteristics of the joint of the feed system.