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Four ultrasonic welding

The principle of ultrasonic welding is to convert 20kHz (or 15kHz) high -voltage and high -frequency signals generated by the ultrasonic generator. The conversion system is converted to the high -frequency mechanical vibration to the workpiece. The temperature rises. When the temperature reaches the melting point of the workpiece itself, the interface is quickly melted, and then fills the gap between the interface. When the vibration stops, the workpiece is cooled and fixed under a certain pressure to form perfect welding. Ultrasonic welding is a newer welding process. Because of its many advantages, it has become more widely used in various industrial fields.

1) Weldable materials are widely available, and can be used for the same type of metal materials, especially high -conductive, high -thermal conductivity materials (such as gold, silver, copper, aluminum, etc.) and some difficult melting metal; it can also be used for performance differences in performance differences Displicable heterogeneous metal materials (such as materials such as heat conduction, hardness, melting point and other characteristics), welding of metal and non -metallic, plastic and other materials; welding of special structures such as disparity differences and multi -layer foil can also be achieved.

2) Welded parts do not need to be electric, no need to heating sources, no macro pores such as pores in the joints, no crispy metal compounds, and no phenomenon of melting metal splash like resistance weld.

3) The physical and mechanical properties of the weld metal do not change macro -changes. The static load and fatigue strength of the welding joints are higher than that of the resistance welded, and the stability is good.

4) The welding metal surface oxidation film or coating has a small impact on the welding quality, and the treatment of the surface of the welded parts before welding is simple.

5) For the formation of less electrical energy required for the connector, it is only 5%of the resistance welding; the welded parts are small.

6) No need to add any adhesives, fillers or solvents. It has the advantages of simple operation, fast welding speed, high joint strength, and high production efficiency.

The main disadvantage of ultrasonic welding is that it is limited by the power of the existing equipment. Therefore, the thickness of the weld should not be too thick. The connector can only be connected to the connector, and the welding of the connecting joint cannot be achieved.

In the automotive industry, ultrasonic welding is mainly used for welding of plastic parts and internal and external decorative parts, such as car bumpers, door plates and wire beams. The ultrasonic welding equipment.

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