company news about The difference between ultrasonic metal welding and ultrasonic plastic welding

1. Ultrasonic plastic welding machine
When the ultrasonic wave acts on the thermoplastic plastic contact surface, it will produce tens of thousands of high-frequency vibrations per second. This kind of high-frequency vibration with a certain amplitude will transmit the ultrasonic energy to the welding area through the upper weldment. Because the welding area is two The acoustic resistance is large at the welding interface, so local high temperature will be generated.
In addition, due to the poor thermal conductivity of the plastic, it cannot be distributed in time for a while, and it gathers in the welding area, causing the contact surface of the two plastics to melt rapidly, and after a certain pressure is applied, they merge into one.

When the ultrasonic stops, let the pressure continue for a few seconds to make it solidify and shape, thus forming a solid molecular chain to achieve the purpose of welding, and the welding strength can be close to the strength of the raw material.
The quality of ultrasonic plastic welding depends on the amplitude of the transducer's welding head, applied pressure and welding time. The welding time and welding head pressure can be adjusted, and the amplitude is determined by the transducer and the horn.
The interaction of these three quantities has a suitable value. When the energy exceeds the suitable value, the melting amount of the plastic is large and the welded material is easy to deform; if the energy is small, it is not easy to weld firmly, and the applied pressure cannot be too large. This optimal pressure is the product of the side length of the welded part and the optimal pressure per 1mm of the edge.

2. Ultrasonic metal welding machine
The principle of ultrasonic metal welding is a special method of connecting the same metal or dissimilar metals by using the mechanical vibration energy of the ultrasonic frequency (over 15KHz).
When metal is ultrasonically welded, it neither delivers current to the workpiece nor applies high temperature heat to the workpiece, but under static pressure, the wire frame vibration energy is transformed into friction work, deformation energy and limited temperature rise between the workpieces. .

The metallurgical bonding between the joints is a solid state welding that is realized without the base material melting. Therefore, it effectively overcomes the spatter and oxidation caused by resistance welding.
Ultrasonic metal welding machine can perform single-point welding, multi-point welding and short strip welding on thin wire or sheet materials of non-ferrous metals such as copper, silver, aluminum, and nickel.
It can be widely used in the welding of SCR leads, fuse pieces, electrical leads, lithium battery pole pieces, and tabs.