Design And Simulation Analysis Of Dynamic Characteristics Of Bidirectional Vibration Electric Spindle

When faced with the processing of alloy materials,composite materials,hard and brittle materials and other difficult-to-process materials and mechanical parts with poor manufacturability,traditional material processing methods are inefficient,uneconomical,and difficult to meet production needs.These difficult-to-process materials are used in aerospace,high-end Fields such as equipment and biomedicine play an important role,and vibration-assisted cutting processing technology is developing rapidly in this context.Piezoelectric ceramic vibration devices are widely used in the field of mechanical processing,but still have problems such as low power density and complex structure.In contrast,hydraulic vibration devices have large output power,and output amplitude and frequency are easy to adjust.In modern production technology,the high-speed,high-precision,and compact structure of the electric spindle has gradually made it a standard configuration of modern processing machine tools.Therefore,it is very meaningful to study a vibration processing device that integrates electric spindle technology and hydraulic vibration technology.This paper designs a two-way vibrating electric spindle system.The main research contents are as follows:(1)Structural design of vibrating electric spindle.The overall structure of the vibrating electric spindle is designed,and the working principle is briefly described.The vibrating part,the supporting part,the cooling part and the sealing part are designed and selected.(2)Design of hydraulic impulse system.Design a spool rotary directional valve as the power component of the main shaft vibration.The output hydraulic pulse amplitude and frequency are easy to adjust.The key components of the valve core and valve body are designed and calculated and the materials are selected.Support bearings and motors,and other components were selected.(3)Based on the principle of hydraulic system dynamics,by use of AMESim software to build the vibration component model,the rotary valve model,and the proportional relief valve model.According to the product instruction manual,the parameter analysis of the proportional relief valve model is carried out to verify the rationality of the model.And on this basis,the dynamic simulation model of the vibrating spindle system is completed.(4)Based on the established vibrating spindle system model,the dynamic characteristics of the vibrating electric spindle were simulated,and the influence of the excitation frequency,flow,pressure and other parameters in the hydraulic pulse system on the dynamic characteristics of the vibrating spindle system was analyzed.The results showed that: spindle displacement the amplitude decreases with the increase of the excitation frequency.When the excitation frequency is close to the natural frequency of the system,the displacement amplitude will increase and become stable.In addition,as the pressure and flow increase,the spindle displacement amplitude There is a gradual increase trend,which shows that the reasonable combination of various working parameters can obtain the best working effect.