Structural Kinematics Simulation and Analysis of Surface Grinding Machines

Structural Kinematics Simulation and Analysis of Surface Grinding Machines

This study conducted a rigid body motion analysis of the building of a surface grinding machine using RecurDyn Multibody Dynamics (MBD) simulation software in combination with the equivalent screw and equivalent linear guide models provided by the FBG.MT module. In the simulation, the spindle housing’s vertical motion along the z-axis was examined, as well as the rigid body center of mass of the spindle’s three-axis positional fluctuations. The setup of the machine with buffer control for motion was noticed based on the simulation findings. The spindle continued to vibrate in the x and y axes because a ball screw was used to provide z-axis motion. Throughout the motion from the initial stage to directional changes, the vibrational amplitudes along the x and y axes remained minimal, facilitating smooth transitions without noticeable jerks. Observation reveals that in the absence of buffer control, significant vibrations occur along the x and y axes solely during directional changes. Conversely, with the implementation of buffer control, vibration amplitudes notably decrease, ensuring smoother transitions. Furthermore, analysis of three-axis angular errors under buffer control indicates minimal yaw axis deviations during vertical spindle motion along the z-axis. The results of the study provide guidance on the machine’s accuracy and dynamic behavior under different motion control schemes, which suggest employing buffer control for spindle housing motion in order to satisfy real-world engineering requirements.