Workpiece Damping Technology For Stability Processing Of Thin-walled Parts

With the continuous development of aerospace and other fields,thin-walled parts have been used more and more widely.However,the stiffness of thin-walled parts is relatively low,and the processing technology is poor.Therefore,it will generate vibration during machining process.Compared with the method of reducing cutting depth to control the vibration amplitude,attach a dynamic vibration absorber to the workpiece is not only convenient and economical,but also does not depend on a lot of process experience.Aimed at the machining process of thin-walled parts,a design method of combined dynamic vibration absorber with multiple vibration absorbers was studied in this paper.Firstly,aimed at the complex structure with multi thickness and multi degree of freedom,the mechanical model was set up,and the parameters of the combined vibration absorbers were preliminarily determined.Secondly,the optimization process was established based on the MATLAB software programming,and the optimal parameters of the combined vibration absorber were obtained after iterative operation.Then,further development of ABAQUS was carried out by using Python language.Combined with MATLAB programming,the size parameters of all components of the combined vibration absorbers were determined and optimized.The finite element dynamic simulation and the corresponding experiments were carried out.Took the acceleration frequency response function of a series of key points on the workpiece as a reference,the vibration intensity of each thickness workpiece before and after installation of the combined vibration absorbers was simulated through software ABAQUS,and the location arrangement of the absorbers was optimized.Finally,based on the previous analysis process,the acceleration frequency response function at the key point of the workpiece surface and the vibration response under the excitation condition of the exciter were selected for reference.The experimental results show the effectiveness of the designed combined dynamic vibration absorbers for the vibration control of the workpiece.