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The rigid-flexible coupled kinematics analysis model of the five-axis high-speed gantry machining center with a flexible beam is established. The mean deviation of the tool nose, the standard deviation of the vibration in the course of the movement, the maximum deviation and the final positioning accuracy are taken as the evaluation criteria. The influence of the beam on the process of the movement is analyzed. It’s found that the structure of the beam affects the movement in the X-axis and Z-axis directions. The sensitivity analysis and orthogonal test method are used to optimize the static and dynamic stiffness of the beam. Eventually, the mean deviation in the X-axis and Z-axis direction of the tool nose is reduced by 19.35% and 18%, the standards deviation is decreased by 44.34% and 64.43%. The overall movement performance of the machining center improves significantly.

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The Optimization Design of Machine Tool Beam Based on Kinematics Simulation

  • 会议论文

  • 发表日期：

    2026年

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  • Xi Lu,
  • Jianrun Zhang,
  • Beibei Sun

摘要

The rigid-flexible coupled kinematics analysis model of the five-axis high-speed gantry machining center with a flexible beam is established. The mean deviation of the tool nose, the standard deviation of the vibration in the course of the movement, the maximum deviation and the final positioning accuracy are taken as the evaluation criteria. The influence of the beam on the process of the movement is analyzed. It’s found that the structure of the beam affects the movement in the X-axis and Z-axis directions. The sensitivity analysis and orthogonal test method are used to optimize the static and dynamic stiffness of the beam. Eventually, the mean deviation in the X-axis and Z-axis direction of the tool nose is reduced by 19.35% and 18%, the standards deviation is decreased by 44.34% and 64.43%. The overall movement performance of the machining center improves significantly.