Vibration Characteristic Analysis And Structure Optimization Of Winding Machine For Direct Drive Motor

With the continuous development and progress of science and technology,direct drive motor has been applied to the drum washing machine,this kind of motor compared with the traditional indirect drive motor has high precision,low noise and other obvious advantages,by the majority of consumers favor,also become the first choice of drum washing machine manufacturers.Due to the high precision of direct drive motor control,higher requirements are put forward for the machining precision of motor manufacturing.The vibration characteristics of the winding machine of direct drive motor directly affect the machining precision of the machine,so it is very important to study the vibration characteristics of the whole machine and its main parts.This paper takes the winding machine of direct-drive motor developed by a company as the research object,analyzes the vibration characteristics of the whole machine and the main components,and puts forward the optimization scheme for the key components,so as to reduce vibration and noise.Firstly,the LMS vibration test system is used to collect and process the vibration output signal of the winding processing equipment of direct-drive motor,and the modal test of the whole machine is carried out in combination with the motion-shifting hammer method.Through the analysis of the frequency response function,the modal parameters of the equipment are obtained.At the same time,the vibration response of the winding processing equipment under working condition is tested.Through the analysis of the experimental data,the main peak frequency and vibration response amplitude of the vibration produced by the processing equipment are obtained.The vibration characteristics of the equipment are obtained and the experimental basis is provided for the simulation analysis.Then,on the basis of the theory of vibration characteristics,combined with the experimental data repeated trial,precise winding processing equipment of the finite element model is established,and based on the dynamic characteristics of the equipment,by defining the unit features and finite element simulation is carried out in combination with surface simulation,effective pretreatment,equipments for the modal analysis and vibration response analysis,get the coiling processing equipment before six order natural frequency,vibration mode and vibration response amplitude curves,further access to the vibration characteristic of the equipment.The accuracy of the simulation analysis is verified by comparing the simulation results with the experimental data.On this basis,the dynamic characteristics of the main components of winding machining equipment are simulated.Through the analysis of simulation results,the weak links of machining equipment are identified,and the headstock and column are determined to be the main components of the following optimization.Finally,aiming at the weak links,the effective headstock finite element model is used for the multi-objective optimization of the structure,the response surface model is established and the genetic algorithm is used for the optimization calculation,and the optimal design variable value satisfying the component performance index is obtained.At the same time,the variable density method is used to optimize the topological optimization of the column in the design area with the maximum of the low order natural frequency.After comparison,the weak links of the optimized structure are improved,the static and dynamic performance of the components are improved,and the performance and winding precision of the equipment are improved,which provides a valuable reference for the design of the winding processing equipment.