The influence of pressure on the welding efficiency of ultrasonic welding machines

The influence of pressure on the welding efficiency of ultrasonic welding machines

During the operation of the ultrasonic welding machine, the pressure not only controls the action, but also completes the fusion of the workpiece. And different materials will determine the amount of pressure required during the welding process, so choosing an appropriate pressure value plays a crucial role in the welding results. The pressure of the ultrasonic welding machine is displayed on a digital display (adjustable from 0.1 to 0.8 MPa), and whether the pressure is too low or too high can affect the welding effect.

The influence of pressure on the welding efficiency of ultrasonic welding machines (Figure 1)

If the pressure value is too low, it will cause ultrasonic vibration to be unable to be effectively transmitted to the welded part, resulting in insufficient friction between the welded part and the welding surface, and a large amount of energy will be consumed on the surface, causing ineffective welding.

If the pressure value is too high, it will cause the energy of vibration to be improperly applied, resulting in excessive friction, weakened frictional motion between welded parts, and even affecting the amplitude. The ultimate result is a reduction in the connection area between welded parts and a decrease in the strength of the welded joints.

Therefore, selecting an appropriate pressure value can achieve the ideal effect of ultrasonic welding. Just like the selection of amplitude, the higher the air pressure value, the shorter the welding time required during the welding process, and it can also ensure that the strength of the welding point remains unchanged. Therefore, in the actual operation of the ultrasonic welding machine, we hope that everyone can choose a higher pressure value. When welding some relatively small workpieces or plastic parts with high precision requirements, the pressure value can be slightly lower.

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