Design On Ultrasonic Ellipse Vibration Working Head And Experiment

In recent years,Chinese scientific development is very rapid,technological progress is very big.Country's socialist modernization construction is becoming more and more quickly,thus puts forward the corresponding requirements to machining manufacturing is becoming more and more high.The raise of ultrasonic vibration cutting(UVC)technology can solve this problem very well,compared with the traditional cutting technology,the separation feature in the process of UVC makes the ultrasonic vibration cutting technology has advantages in many aspects.The simulation results show that the UVC can reduce the cutting force,stress value and cutting temperature,it's beneficial to enhance the life of the cutting tool and improve the machining accuracy.In reference to a large number of domestic and foreign study on ultrasonic vibration cutting technology,on the basis of this topic has designed a new kind of two-dimensional elliptic head ultrasonic vibration cutting work.The main research content is as follows:Firstly,the developed history,the research status at domestic and abroad of UVC have been systematically summarized in this thesis.It also analyzes the developing trend of the technology of ultrasonic vibration cutting and illustrates the research purpose and meaning of this paper.Secondly,this paper introduces the basic knowledge of the transducer and the piezoelectric ceramic,makes further research into the the theories of the UVC technology,analyzes the forming mechanism of elliptical orbit and summarizes the characteristics of vibration cutting.The design ideas of working head was described,and then the structural designs of working head were finished,at last the 3D model has been built.Thirdly,The dynamics analysis for working head are finished by the finite element analysis software ABAQUS,extract the natural frequency and vibration mode of the working head.Research on the factors which influence the natural frequency of the structure,based on the results of the analysis,the optimization design of working head was carried out.Finally,ABAQUS software is used to establish the thermal stress of the austenitic stainless steel coupling three-dimensional cutting model,finite element simulation and cutting,the cutting force,cutting temperature,ultrasonic elliptical vibration cutting and common cutting are analyzed in comparison.At the same time,also has carried on the actual processing.The actual test results,were compared.