Introduction

With the progress of science and the continuous development of soldering process, the traditional soldering process based on heat source cannot meet the current and future needs of electronic equipment assembly process, while the laser soldering process provides a new solution. Han’s Laser soldering system enables the tin soldering process with automatic wire feeding and synchronized tin melting. Developed through system integration, the system provides customers with an efficient laser soldering process. After the laser is transmitted and focused through the laser fiber, the continuously fed tin wires are melted and distributed on the workpiece pads, thus realizing high-precision and high-quality soldering of user products.

Understanding the Laser Soldering

Laser soldering uses a laser as a heat source and acts on the surface of the brazed area to form an IMC layer of the brazed joint by melting the brazing material. Laser soldering has the advantages of adapting to a variety of brazing materials, non-contact, flexible and so on. It is widely used in the soldering of printed circuit boards, FPC sockets and mounting components.

Laser Soldering Process

The Features of the Laser Soldering

1.Non-contact heat source, synchronized laser wire feeding, small spot, small heat-affected zone, minimizing the damage around the soldering joint.

Laser welding does not use a soldering iron tip and does not damage the tip, thus reducing production costs. In addition, the temperature and the quality are stable during laser soldering. In laser welding, the laser only heats up the irradiated part, the local temperature rises faster, and the welded joint quickly reaches the temperature required for welding. It has less influence on other originals because the short rapid heating time and the temperature rise area around the welded joint is limited.

2.High precision and flexibility

The system integrates the self-tuning function, through the P, I, D feedback value of the self-tuning system so that the temperature inversion is more accurate, debugging is more convenient. Aiming at the variability of the energy demand of the welding point of the product, the system can edit multiple welding temperature curves, and the same program calls different soldering temperature curves in different soldering points.

3.Good heat dissipation and high protection level.

Non-contact laser brazing reduces the use of rosin and flux residues, as well as the generation of fumes, dross and hazardous waste. Laser soldering machine can accurately control the temperature of solder joints in real time, avoid burning circuit boards, greatly reduce the difficulty of debugging the soldering process and the risk of operator injury.

4.Small size, fewer consumables, easy maintenance, low cost.

Laser soldering consumes less heat due to localized heating and does not generate heat when soldering is not taking place, thus saving electricity and reducing costs.

Conclusion

Laser soldering is a process that utilizes the thermal effect of laser to complete the melting of tin, and other processes. As a new type of soldering process designed to overcome the shortcomings of traditional soldering methods, non-contact laser soldering technology with its high precision, high efficiency, and other advantages, to replace the traditional iron soldering has become an irreversible trend.