Various applications of ultrasonic metal welding machine
In recent years, the application of ultrasonic technology has spread in all walks of life, from ultrasonic cleaning to ultrasonic screening, wall breaking to ultrasonic distance measurement, and finally to ultrasonic welding. It can be seen that this technology will usher in a blue ocean. While each industry improves the quality of its own products, it is also indispensable to upgrade and update the manufacturing process. Today we will unveil the mystery of one of the processes "ultrasonic welding"!
Ultrasonic welding uses ultrasonic vibration and frictional heat to melt the workpiece by using the frictional heat energy generated on the contact surface of two workpieces to be welded. Heat energy comes from the reciprocating movement of a workpiece on another surface with a certain displacement or amplitude under a certain pressure. Once the desired degree of heat bonding is reached, the vibration will stop, and at the same time there will still be a certain amount of pressure applied to the two workpieces to cool and solidify the parts that have just been heat-bonded, thereby forming a tight bond.
There are many branches of ultrasonic welding
1. As the nerve center of the automotive electronic and electrical system, the automotive wiring harness is designed and manufactured to directly affect the normal operation of the entire automotive electrical system. The development of electronics and information technology has put forward more and more requirements on the design and manufacturing process of automobile wiring harness, especially the quality of the transmission signal of automobile wiring harness. Therefore, only using shielded wires, twisted-pair wires, gold-plated terminals, etc. in the production of automotive wiring harnesses is far from meeting these requirements. In fact, the ultrasonic welding crimping process is also a major measure to improve the quality of the transmission signal and transmission current of the automobile wiring harness.
Ultrasonic metal welding, compared with plastic welding, the technical requirements of ultrasonic metal welding are much higher, and the workpieces to be welded can only be small. How to make the perfect fusion of two larger metal workpieces is still in the field of ultrasonic metal welding. Constantly overcome problems. Ultrasonic metal welding is currently widely used in automotive wiring harnesses, wiring harness terminal connections, power batteries and other fields. The welded product has the advantages of the lowest electrical resistivity, the best electrical conductivity, and high welding strength. In addition, during the welding process, there will be no sparks, fumes, high brightness, no flux and shielding gas, and it is safe and environmentally friendly.
Tesla, a strong player in the field of new energy vehicles, has applied ultrasonic metal welding technology in automobile manufacturing, and large domestic automobile wiring harness companies are also using it. Due to the high technical requirements of the hardware equipment for ultrasonic metal welding, there are few domestic manufacturers that do well, such as BONNE Bangneng and Foshan Chuxin. Foreign countries are mainly Swiss Tesonco, American Branson, Sono, Germany EURO and so on. However, the price of fully imported equipment is not cheap. For example, the price of equipment for welding 70-95mm square wire harness is as high as one million yuan.
Second, the ultrasonic metal welding equipment is the imported German ultrasonic system and ultrasonic transducer, with the self-developed ultrasonic welding head and frame. While ensuring the stability and uniformity of welding, the equipment cost is greatly reduced so that small and medium-sized enterprises can also use advanced welding technology.
3. Ultrasonic rolling welding is mainly used for the welding of solar heat collecting plates and solar cells. It is suitable for welding the whole circle of aluminum strip to the aluminum-plated glass by ultrasonic rolling welding. The aluminum strip is automatically fed in and automatically cut. Used in the welding of solar panels, solar collectors, solar collectors, aluminum-plastic composite pipes, electric heating appliances (heating pipe aluminum-copper welding), aluminum corrugated board processing, copper-aluminum plate splicing, etc.; generally suitable for aluminum, Silver, silver-copper alloy, copper, phosphor bronze, brass, red copper, bronze, nickel, gold and other high-conductivity metal welding applications are effectively used in solar energy, batteries, and hardware products.
