A rigid-flexible multi-point support head driven by voice coil motors is designed and developed in response to the characteristics of aerospace large thin-walled parts that are prone to deformation and chat-tering during machining. The support head can ensure the wall thickness error while suppressing vibration. Firstly,ANSYS was used to carry out modal analysis and dynamics analysis on the thin-walled part and de-termine the optimal pre-push displacement,and then the optimal pre-push displacement and the vibration suppression effect was verified through the modal experiments as well as the milling experiments. Mean-while,the active disturbance rejection controller ( ADRC) was employed in the milling tests to control the real-time axial displacements of the two motors,ensuring consistent axial cutting depth throughout the ma-chining process. The results indicate that the support head effectively suppresses vibration in thin-walled parts with an optimal pre-push displacement of 1 mm. The support head demonstrates excellent control effect over maintaining consistent axial cutting depth throughout the machining process,while also suppress-ing the vibration within the range of±5 μm.
关键词
音圈电机/薄壁件/颤振抑制/机器人加工/支撑头
Key words
voice coil motor/thin-walled parts/chatter suppression/robotic machining/follow-up support head
维普
万方数据