When an object vibrates, it makes a sound. Scientists refer to the number of vibrations per second as sound frequency, in Hertz. When the vibration of the object exceeds a certain frequency, that is, higher than the upper limit of the hearing threshold of the human ear, the human can not hear it. This kind of sound wave is called "ultrasonic." With the emergence of ultrasonic welding machine, using the principle of ultrasonic, let us understand the welding method of ultrasonic welding machine.

1. Welding method: Under moderate pressure, the welded joint will generate frictional heat at the joint surface of the two pieces of plastic and the instantaneous weld under the action of ultrasonic high-frequency vibration. The welding strength can be equivalent to that of the main body. The use of suitable workpieces and reasonable interface design can achieve watertightness and airtightness, avoid the inconvenience caused by the use of auxiliary products, and realize efficient and clean welding.

2. Riveting welding method: pressing the welding head of ultrasonic high frequency vibration on the protruding pin of the plastic product, instantaneous heat melting into a rivet shape, and mechanically riveting materials of different materials together.

3. Embedding: With the help of the channel of the welding head and appropriate pressure, metal parts (such as nuts, screws, etc.) are instantly squeezed into the reserved plastic holes and fixed to a certain depth. The tensile force and torsion force after molding are comparable to the strength of traditional mold molding, avoiding the defects of injection mold damage and slow injection speed.

4. Forming: This method is similar to the riveting method. The concave welding head is pressed on the outer ring of the plastic product. After the welding head is subjected to ultrasonic and high-frequency vibration, the plastic is melted and formed, and then coated on a metal object to be fixed, and the appearance is smooth and beautiful. This method is mainly used to fix electronic products, speakers and cosmetics.

5. Spot welding: welding can be achieved without designing the welding seam in advance. For large workpieces, spot welding is not easy to design welds. In order to achieve the welding effect, multiple points can be spot welded at the same time. According to the degree of automation, ultrasonic welding machines can be divided into automatic welding machines, semi-automatic ultrasonic welding machines and manual welding machines. For modern enterprises, the higher the degree of automation, the more conducive to the production of the production line, so the use of automatic welding machines is the future trend.