Frequency Characteristics Analysis of Ultrasonic Blanking Die Using FEM - Optimal Design for a Stepped Solid Horn -

摘要

In this paper, we describe a design methodfor stepped solid horns using the FEM (Finite ElementMethod) and the experimental evaluation of anultrasonic blanking die. A simulation method for anultrasonic vibration system by FEM is proposed todetermine the optimal size of a stepped solid horn. Inthis simulation method, the forced vibration and thedamping are considered, and the calculation model isnot only applicable to a horn but also to an ultrasonicvibration system comprising a cone, a tool horn, aflange and a vibrator. An ultrasonic tie-bar cuttingdie has been developed based on the FEM optimal design.The effects of ultrasonic vibration on blanking wereexperimentally investigated using this die. Bycomparing the FEM simulation results with experimentalresults on the amplitude of the tool horn and thefrequency characteristics of the ultrasonic vibrationsystem, it is clarified that the proposed simulationmethod is valid for the design of an ultrasonicvibration system. It is also found that the shearingforce is decreased and the clearance is increased by ultrasonic vibration.