Research On Vibration Energy Harvesting Technology Of Machine Tool Spindle

In the manufacturing industry,machine tools play a pivotal role.Besides in the entire machine tool system,the spindle is one of the key components,and its vibration becom es a bad factor that affects the quality and accuracy of the final parts.In order to reduce the impact of vibration on the spindle and turn the excess vibration energy into valuable s,the Villari effect of the giant magnetostrictive material Terfenol-D was used to design a nd fabricate an energy harvesting device applied to the spindle of a machine tool.The m ain research content includes:(1)Author analyzed the current research status of vibration at the spindle,and combi ned with this status to further study the existing vibration energy harvesting technology.F inally she got the current main vibration energy harvesting method.According to the appli cation scenarios and advantages and disadvantages of various methods,the giant magnetost rictive type is finally adopted.On the other hand,the current application status of the gia nt magnetostrictive vibration energy harvesting technology in machine tools is introduced.(2)A detailed analysis of the vibration characteristics of the CK6140 machine tool w as carried out,and the basic working parameters of the CK6140 were determined.The vi bration signal of the spindle was simulated by MATLAB,then the vibration mode of the ANSYS finite element analysis was carried out.Finally The result shows that within the selected operating parameters,the spindle will not resonate.(3)The author establishes a magneto-mechanical-thermal coupling model for magnetos trictive materials.First,a good dynamic model needs to be established.On this basis,a magnetic field model is established.Finally,the two combined to calculate the induced el ectromotive force model.Use MATLAB to simulate the calculated mathematical model.T he simulation results show that as the temperature rises,the induced electromotive force o utput by the energy harvesting device will decrease.(4)According to the structural characteristics and vibration characteristics of the mach ine tool spindle,the structure of the energy harvesting device is designed.The structure mainly includes Terfenol-D,an induction coil,and a coil skeleton.The coil bobbin includ es an adjusting support base,a permanent magnet,an ejector rod,and a disc spring.The author considered the installation and disassembly requirements of the energy harvesting d evice in the design.(5)Experimental verification.The experimental platform mainly includes the excitatio n signal part,the force part of the magnetostrictive material and the collected data output part.Experiments show that the amount of temperature change is inversely proportional t o the induced electromotive force output by the vibration energy harvesting device.The er ror between the experimental data and the theoretical model data is less than 5mv,thus c onfirming the validity of the theoretical model.