1. What is ultrasonic welding equipment
Ultrasonic metal welding uses high-frequency vibration waves to transmit to two metal surfaces to be welded. The fusion between the molecular layers is formed by rubbing the two metal surfaces against each other. The advantages are fast, energy saving, high fusion strength, good conductivity, no sparks, and close to cold processing; less than or equal to 5mm), the solder joint position should not be too large, and it needs to be pressurized.
2. Types of ultrasonic welding equipment
1. Ultrasonic plastics Welding
A welding method in which two pieces of plastic are fused together due to the friction and heat generated by the surface molecules of thermoplastics under the action of ultrasonic vibration.
2. Ultrasonic metal welding
Ultrasonic metal welding is a mechanical treatment process. During the welding process, no current flows through the weldment. , and there is no welding arc such as electric welding mode. Since ultrasonic welding does not have problems such as heat conduction and resistivity, it is undoubtedly an ideal metal welding equipment system for non-ferrous metal materials. Weld efficiently.
Three, the principle of ultrasonic welding equipment
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 transmits ultrasonic energy to the welding area through the upper weldment. Due to the large acoustic resistance in the welding area, that is, the interface between the two welding, local high temperature will be generated. In addition, due to the poor thermal conductivity of the plastic, it cannot be distributed in time and gathers in the welding area, causing the contact surface of the two plastics to melt rapidly. When the ultrasonic wave stops working, let the pressure continue for a few seconds to make it solidify and form, thus forming a strong molecular chain to achieve the purpose of welding, and the welding strength can be close to the strength of the raw materials.
The quality of ultrasonic plastic welding depends on the amplitude of the transducer welding head, the applied pressure and the welding time. The welding time and welding head pressure can be adjusted, and the amplitude is determined by the transducer. And the horn decides. The interaction of these three quantities has an appropriate value. When the energy exceeds the appropriate value, the melting amount of the plastic will be large, and the welding object will be easily deformed; if the energy is small, it will not be easy to weld firmly, and the applied pressure should not be too large. This optimum pressure is the product of the edge length of the welded part and the optimum pressure per 1mm of the edge.
