Laser welding technology is a high-precision and high-efficiency welding method, which can achieve the effect of seamless weld. The following will describe in detail how the laser welding machine to achieve a seamless weld.
First, laser welding principle
Laser welding is a process that uses the high energy concentration of the laser beam to fuse two or more workpieces together. The specific steps are as follows:
1. Preparation: Select the appropriate welding machine and laser, set the appropriate parameters, and prepare the materials to be welded.
2. Alignment welding position: Place the workpiece on the welding machine, and use the positioning device to align the welding position to ensure the accurate alignment of the weld.
3. Control the welding process: The laser welding machine realizes welding by controlling the size of the laser beam, the focus position and the scanning speed. When the laser beam shines on the workpiece, high energy heat is generated, melting the surface of the workpiece.
4. Cooling and curing: When the laser beam stops irradiating, the molten metal will quickly cool and solidify, forming a weld.
Second, the key technology to achieve seamless weld
1. Selection of laser equipment: Choosing the right laser and welding machine is the key to achieve seamless welding seams. Lasers need to have high beam quality and high power output, so that the laser beam can concentrate energy and quickly melt the welding material.
2. Adjustment of welding parameters: By adjusting welding parameters, such as laser power, laser beam diameter, scanning speed, etc., the energy input and melting area in the welding process can be controlled to achieve fine regulation of the weld. Reasonable parameter Settings can ensure the smooth flow of molten metal liquid during welding, and reduce the defects such as bubbles and pores produced during welding.
3. Substrate surface treatment: Before welding, the surface of the substrate is treated, such as removing the oxide layer, oil, etc., which can improve the welding effect. The surface treatment can increase the absorption rate of the substrate and the laser beam, reduce the influence of energy reflection, and improve the welding quality.
4. Welding head shape optimization: Designing and optimizing the shape of the welding head can improve welding quality. The proper contact Angle and welding head shape can reduce welding defects, such as cracks and penetration, during the welding process.
5. Welding speed control: Controlling the welding speed can control the temperature and cooling speed of the melting area, so as to regulate the formation process of the welded joint. The proper welding speed can keep the melting area in a proper temperature range and avoid welding defects caused by overheating or undercooling.
6. Automatic control: The automatic control system can realize the automatic control and monitoring of the welding process. Through the automatic control of laser welding machine, the consistency and repeatability of welding can be improved to ensure the quality of welding.
Third, the application field of laser welding machine
Laser welding technology has been widely used in the automotive industry, aerospace, electronic equipment, power equipment, medical equipment and other fields. Its advantages include high welding speed, no need to fill materials, and low thermal impact on the workpiece.
In the automotive industry, laser welding machine is widely used in automotive body welding, transmission welding, sheet metal welding and other processes, which can improve welding quality and production efficiency.
In the aerospace field, laser welding machines can be used for the welding of aircraft engines and the connection of spacecraft parts. The characteristics of the seamless weld can ensure the tightness and strength of the welding parts.
In the manufacture of electronic equipment, laser welding machines can be used for battery welding, circuit board welding and other processes to avoid thermal deformation and dirt generated in traditional welding methods.
To sum up, by reasonable selection of laser and welding machine, adjusting welding parameters, controlling welding speed, optimizing welding head shape and other ways, the welding seam can be achieved in the process of laser welding. At present, laser welding technology has been widely used in many fields, which is of great significance to improve welding quality and production efficiency.