What is ultrasonic, what is ultrasonic welding machine?

Ultrasound is a sound wave with a frequency higher than 20,000 Hz. It has good directionality and strong penetrating ability. It is easy to obtain concentrated sound energy and has a long distance in water. It can be used for distance measurement, speed measurement, cleaning, welding, and stone breaking. , Sterilization, etc. There are many applications in medicine, military, industry, and agriculture. Ultrasound is named for its lower frequency limit greater than the upper limit of human hearing. Scientists call the number of vibrations per second the frequency of sound, and its unit is Hertz (Hz). The frequency of sound waves that our human ears can hear is 20Hz-20000Hz. Therefore, we call sound waves with a frequency higher than 20,000 Hz "ultrasonic". Ultrasonic frequencies commonly used in medical diagnosis range from 1 MHz to 30 MHz.

Theoretical research shows that under the condition of the same amplitude, the vibration energy of an object is proportional to the vibration frequency. When the ultrasonic wave propagates in the medium, the vibration frequency of the medium particles is very high, so the energy is very large. In the dry winter in northern China, if the ultrasonic wave is passed into the water tank, the severe vibration will break the water in the tank into many small mist droplets, and then use a small fan to blow the mist droplets into the room, which can increase the indoor air humidity. This is the principle of ultrasonic humidifier. For diseases such as pharyngitis and tracheitis, it is difficult to use the blood flow to make the medicine reach the affected part. Using the principle of a humidifier to atomize the medicine liquid and let the patient inhale it can improve the curative effect. Utilizing the huge energy of ultrasound can also make the stones in the human body undergo violent forced vibration and shatter, thereby alleviating the pain and achieving the purpose of healing. Ultrasound is widely used in medicine and can sterilize items.

Ultrasonic welding machine is a machine that uses the principle of frictional heat generation to generate a large amount of heat to achieve the purpose of welding and welding. Ultrasonic welding machines are divided into ultrasonic plastic welding machines and ultrasonic metal welding machines.

Ultrasonic plastic welding machine

1. Welding method: Ultrasonic vibration transmits ultrasonic waves to the weldment along with the welding head. Due to the large sound resistance at the two weldments, local high temperature is generated to melt the interface of the weldment. Under a certain pressure, the two weldments can achieve a beautiful, fast and strong welding effect.

2. Implantation (insertion) method: Nuts or other metals are inserted into plastic workpieces. First, the ultrasonic wave is transmitted to the metal, and through high-speed vibration, the metal object is directly embedded in the molded plastic, and the plastic is melted at the same time, and the embedding is completed after it solidifies.

3. Riveting method: If you want to join metal and plastic or two plastics with different properties, you can use ultrasonic riveting method to make the weldment not easy to be brittle, beautiful and strong.

4. Spot welding method: Use a small welding head to weld two large plastic products in points, or directly press the entire row of toothed welding heads on two plastic workpieces, so as to achieve the effect of spot welding.

5. Molding method: Ultrasonic waves are used to instantly melt the plastic workpiece into shape, and when the plastic solidifies, it can make metal or other plastics firm.

6. Cutting method: Using the special design method of the welding head and the base, when the plastic workpiece is just shot out, it is directly pressed on the plastic branch, and the cutting effect is achieved through ultrasonic transmission.

Ultrasonic metal welding machine

According to the internationally accepted purposes, ultrasonic metal welding has four series: spot welding, roll welding, sealing and cutting, and wire harness, which are widely used in various fields such as automobiles, refrigeration, solar energy, batteries, and electronics.

Ultrasonic metal welding applicable products:

A. Power battery multi-layer positive and negative electrode welding; Ni-MH battery nickel mesh and nickel sheet welding

B. Lithium battery, polymer battery copper foil and nickel sheet welding; aluminum foil and aluminum sheet welding; aluminum sheet and nickel sheet welding

C. Automobile wiring harness; forming of wire heads; welding of wires; welding of multiple wires into knots; conversion of copper and aluminum wires

D. Welding wires, cables and various electronic components, contacts, connectors and terminals

E. Solar cells, flat solar heat absorbing panels, aluminum-plastic composite pipe roll welding, copper and aluminum plate splicing

F. Welding of high-current contacts, contacts, and dissimilar metal sheets such as electromagnetic switches and no-fuse switches

G. Copper pipe sealing for refrigerators, air conditioners and other industries; water and airtight sealing and cutting of copper and aluminum pipes for vacuum devices

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