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What effect does air pressure have on ultrasonic metal welding?

Ultrasonic metal welding technology is now one of the commonly used welding methods. During the welding process, different pressures of air pressure will be generated. The air pressure will transmit ultrasonic oscillations to the weldment through the sonotrode, so the choice of air pressure will affect To the effect of welding.

Air pressure directly affects the dynamic mechanical impedance of the oscillating system and an important factor in the degree of weldment deformation. The pressure function is to directly transmit ultrasonic energy to the weldment. If the pressure is zero, the weldment will not receive ultrasonic energy.

If the air pressure is too small, the ultrasonic oscillation will not be well transmitted to the weldment, resulting in a lack of conflict between the weldment and the welding surface, and a large part of the energy will be consumed in the external sliding. Above, it is bound to be unable to form an effective welding connection, and only when the pressure is increased to make the material form plastic activity, the weld zone can be formed.

If the air pressure is too high, it will cause the oscillating energy to be unreasonably used, which will cause the welding materials to collapse and weaken the cross section, and the welding strength will be weakened. Affect the amplitude of the situation, so that the connection area between the weldments does not increase but decreases, and the strength of the solder joints will also decrease.