1、 The working principle of ultrasonic soldering iron
The core of an ultrasonic soldering iron consists of a heating system and an ultrasonic vibration system:
1. The heating system uses electric heating elements to bring the soldering iron tip to the required temperature for welding, which is usually adjusted according to the jewelry material.
2. The ultrasonic vibration system consists of transducers, amplitude rods, etc. It can generate high-frequency mechanical vibrations (usually 20-40kHz), which are transmitted to the welding area through the soldering iron tip.
The combined effect of the two is that vibration can break the oxide layer and dirt on the metal surface, while making it easier for the solder to penetrate into the gaps of the parts to be connected, achieving a more firm and precise welding.2、 Application in Jewelry Manufacturing
Fine component welding
Suitable for connecting small or thin-walled components such as necklace links, earring needles, pendant buckles, etc. Traditional soldering irons may cause component deformation due to their large heating area, while the high-frequency vibration of ultrasonic soldering irons can reduce the heat affected zone and ensure component dimensional accuracy.
When making 18K gold thin necklaces, precise welding of chain links with a diameter of less than 0.5mm can be used to prevent chain links from breaking or deforming due to overheating.
1. Complex structure assembly
For complex jewelry with hollow or inlaid features (such as micro inlaid diamonds), ultrasonic soldering iron can complete local welding without damaging the gemstone or hollow structure. Its vibration energy is concentrated, which can reduce heat conduction to the surrounding area.
2. Material adaptability
Suitable for common jewelry metals such as gold, silver, platinum, and K-gold, especially for high hardness alloys (such as platinum alloys), the welding effect is better than traditional tools because vibration can assist the flow of solder on the surface of high melting point metals.
3、 Application in Jewelry Restoration
1. Fracture repair
For problems such as broken rings and necklace links, ultrasonic soldering iron can accurately connect the broken surface, and through vibration, the solder can fully fill the gaps. After repair, the interface is smooth and almost without obvious traces.
For example, when repairing the broken part of a delicate silver bracelet, it can avoid the interface protrusion or discoloration that may be caused by traditional welding.
2. Repair of worn parts
For components such as earring holders and ring claws that have worn out due to long-term use, ultrasonic soldering iron can be used to add a small amount of solder for repair, restoring their original shape and function, and the repaired area is tightly integrated with the original component.
3. Inlay reinforcement
When gemstones (such as diamonds and sapphires) on jewelry become loose due to setting claws, ultrasonic soldering iron can be used to micro weld and reinforce the claws. The local thermal and mechanical forces generated by vibration can make the metal of the claws more tightly wrap around the gemstone, while avoiding damage to the gemstone due to overheating (temperature and vibration time need to be controlled).
Ultrasonic soldering iron, with its advantages of high precision, low heat damage, and strong bonding force, effectively solves the problems of traditional tools in handling fine components, complex structures, and sensitive materials in jewelry manufacturing and repair. It not only improves production and repair efficiency, but also ensures the beauty and durability of jewelry, making it an indispensable advanced tool in the field of modern jewelry processing.
