Research On Key Techniques Of Ultrasonic Piezoelectric Three-dimensional Force Gauge

Ultrasonic processing is a new type of processing technology in recent years.It has unique processing advantages for difficult-to-be-processed materials and hard-brittle processing.Ultrasonic machining Cutting force is an important parameter that reflects the machining status and machining quality of the machine tool.Due to the high frequency of ultrasonic machining and the characteristics of honeycomb composite materials,the dynamic performance of the existing dynamometer and the size of the mesa installation can not meet the measurement requirements of cutting force in the process of ultrasonic cutting honeycomb composite.In this paper,based on the analysis of cutting force characteristics and processing environment in the process of ultrasonic machining of honeycomb composite materials,the key technologies of ultrasonic machining piezoelectric triaxial dynamometer are studied.The state monitoring and ultrasonic cutting mechanism of ultrasonic machining system Research is of great significance.In this paper,the structural design methods of many three-way dynamometers at home and abroad are analyzed first,and the basic working principle of this dynamometer is obtained.According to the dynamic performance theory of the second-order vibration system,the design standard of the lowest natural frequency of the three-way dynamometer is obtained by analyzing the dynamic frequency of ultrasonic machining cutting force by cutting the honeycomb composite material by ultrasonic machining.Through the study of the key technologies of Dunkerlae 's natural frequency estimation and thin plate theory,the optimal structure size of the three-way dynamometer is determined.The finite element simulation of the structure obtained by the analysis method is used to verify the three Dynamometer structure design to meet the dynamic ultrasonic cutting force measurement.Secondly,in order to obtain the static performance and dynamic performance of the three-way dynamometer,this paper studies and analyzes the key technologies of static and dynamic calibration of three-dimensional dynamometer.In the static calibration of key technologies,ICP piezoelectric force sensor can not do static force measurement This paper presents the use of low-frequency dynamic force of the three-way dynamometer static calibration method,and the design of the use of electromagnetic force as a standard force source Non-contact static calibration bench.The static sensitivity coefficient of the three-way dynamometer and the lateral disturbance error of the system are reduced and the measurement accuracy of the dynamometer is improved.In the research of the key technologies of dynamic calibration,this paper,based on the analysis of the dynamic calibration method and the characteristics of ICP sensors,confirms the dynamic calibration by using the impact response calibration method,Point excitation sampling method to implement a single point,the dynamic calibration results verify the structural design of the three-way dynamometer to meet the ultrasonic machining cutting force measurement.Thirdly,the key technologies of the hardware and software design of ultrasonic processing piezoelectric three-way dynamometer are studied.For the three-way dynamometer acquisition software design key technology research,this article based on Labview12.0 software acquisition PC software design,PC program includes signal acquisition module,data storage module and data analysis module in three parts.Finally,in order to verify the research results of the key technologies of the three-way dynamometer and the acquisition accuracy of the three-way dynamometer,this paper makes use of the standard Kistler 9119 A piezoelectric three-dimensional force measuring system and the three-way dynamometer simultaneously to perform ultrasonic machining Cutting comparison experiments,and data collected from multiple sets of repeated experiments from the cutting force frequency and cutting force amplitude angle of two angles to verify the dynamic and static performance of the three-way dynamometer.