Simulation Study On Amplifier Used In Ultrasonic Hot Press Sintering

Ultrasonic horns play an important role in ultrasonic technology,especially in the vibration system of power ultrasonic equipment.The key of the ultrasonic vibration system lies in the horn that amplifies the displacement or velocity of mechanical vibration particles,or concentrates the ultrasonic energy on a small area.The ultrasonic horn with energy gathering function plays an important role in the ultrasonic vibration system.In this system,the transducer can convert electrical energy into mechanical energy.Because the output amplitude of the ultrasonic transducer is only a few microns,in the required amplitude in the field of power ultrasound must reach tens or even hundreds of microns,the transducer must cooperate with the horn to output the required amplitude.The ultrasonic horn can transfer mechanical energy and amplify the amplitude obtained by the transducer.A good horn design can not only meet its own strength requirements,but also improve the working efficiency of the ultrasonic vibration system.The design of traditional ultrasonic horns mainly uses analytical methods to establish dynamic differential equations of horns based on classical theory,and finally obtains the results from the boundary conditions.However,solving differential equations is very difficult and tedious,and can only be solved by regular singular horn.In addition,the traditional law cannot meet some special conditions.In actual working conditions,when the horn is combined with the transducer,it is necessary to open a threaded hole at the end of the ultrasonic horn,or some horns need to add a tool bar or flange,which is calculated by the analytical method and it will be extremely difficult.The ANSYS finite element analysis software is rich in functions,which can not only analyze the dynamics of the ultrasonic horn,but also the parameters of the horn,so ANSYS is used to design and optimize the ultrasonic horn.(1)According to the requirements of the required ultrasonic horn,through the wave equation theory,the design of the conical transition stepped horn is completed.There are three materials used in the horn in this article,which are45 steel,321 stainless steel,and titanium alloy..(2)Three models of ultrasonic horns are established in SolidWorks.The model is imported into ANSYS for dynamic analysis.Modal analysis is used to determine the natural frequency and mode of the ultrasonic horn.Relevant parameters such as stress distribution,displacement nodes,magnification and so on of the horn.An ultrasonic horn dynamic testing system is designed.,(3)The effect of changing the length of the size end of the 321 stainless steel composite horn on the frequency and displacement node of the horn is studied.The frequency and displacement node of the composite horn are simulated,and the correction process is guided by the analysis.The optimization of the frequency of conical transition stepped composite horn provides a new way.At the same time,the parameters of the conical transition stepped composite horn selected from 321 stainless steel are optimized by ANSYS software,which can effectively avoid the tedious calculation process brought by the analytical method and improve the efficiency of solving the resonance length and resonance frequency The parameter optimization design scheme can more efficiently handle the parameter optimization needs of this composite horn.Parametric modeling can closely combine ANSYS parametric design and optimization,greatly improving the efficiency of system optimization.