The process parameters of laser welding of metal wire
Laser welding of metal wires utilizes the process of focused laser pulse irradiation to achieve welding of metal wires. It is an important technology for the automotive industry and other industries, and its welding process parameters are of great significance.
The laser welding of metal wires mainly includes the following process parameters: laser power, laser pulse width, laser pulse number, wire feed speed, wire diameter and workpiece position.
1. Laser power: Laser power is the control element of laser welding of metal wires. It is related to laser type, welding material and thickness, etc. Generally, the welding power should be larger to ensure the welding depth of the weld. The higher the format power is, the heat input is greater, the energy utilization rate is higher, and the welding speed is faster, so it is beneficial to increase the production efficiency.
2. Pulse width: The pulse width of laser power determines the size of the spot to be welded. Generally, the pulse width should be low in order to form a small spot and improve the degree of welding fusion.
3. Number of laser pulses: The number of laser pulses determines the overlap rate of laser beams, which affects the welding quality. Generally, the fewer the number of laser pulses, the greater the overlap rate of laser beams, the faster the welding speed, and the higher the fusion rate of the weld.
4. Wire feed speed: The speed of the wire feed has a great influence on the welding quality. Generally, the wire feed speed should be increased as much as possible, and the welding speed can be increased to a certain extent. However, it should be noted that the wire feed speed should not be too large, otherwise it will cause lack of welding fusion and poor welding quality.
5. Wire diameter: The diameter of the wire should be selected according to the requirements of the welding process. Generally, the smaller the wire diameter is, the higher the concentration and penetration of the laser beam is, but the welding depth is small; on the contrary, the larger the wire diameter is, the lower the laser beam concentration is, but the welding depth is larger.
6. Workpiece position: Proper welding position is the key to good welding quality. Generally, the workpiece needs to be placed firmly in a suitable position to maintain a stable welding state.
In short, laser welding of metal wires is an important technology in many industries. The reasonable process parameters are inseparable from the welding quality. The choice of appropriate process parameters is critical to the success of welding.
