Inhibition of adhesive wear in tantalum cup deep drawing by ultrasonic vibration-assisted forming technology

Tantalum is widely used in capacitor field in modern times. The tantalum shell of capacitor is usually obtained by deep drawing process, and adhesive wear of the shell is the main hidden danger during its deep drawing process. In this paper, ultrasonic vibration-assisted deep drawing technology is proposed to manufacture tantalum capacitor shell, in order to effectively control the adhesive wear of tantalum capacitor with the assistance of ultrasonic vibration energy. Influence of ultrasonic vibration on deep drawing force and surface forming accuracy of tantalum cup deep drawing is discussed by applying different amplitudes of ultrasonic vibration signals at different time periods. The results reveal that in the amplitude range of 3-7 mu m, the amplitude of 5 mu m has the best inhibition effect on adhesive wear during the deep drawing of tantalum cup, and the effect is especially obvious in the initial stage of the deep drawing process; the reduction of wearing can reach more than 22% comparing with the results without ultrasonic amplitude.

Automated summary

In this paper, ultrasonic vibration-assisted deep drawing technology is proposed to control the adhesive wear of tantalum capacitor shell. The influence of ultrasonic vibration on deep drawing force and surface forming accuracy of tantalum cup deep drawing is discussed. The results reveal that an amplitude of 5 μm has the best inhibition effect on adhesive wear during the deep drawing process, reducing wearing by more than 22%.