In recent years, laser welding has been favored by many people. Many operators do not understand the principle and configuration of CNC laser welder, which will lead to improper operation. These small mistakes may affect the beauty and firmness of welding. CNC laser welder is a precision equipment, in which choosing a suitable machine is an essential step. Today, we will introduce to you what a laser welding machine should know and how to do it.
Laser welding is a hot welding process, which uses laser beam as heat source. The laser pulse heats the material in a small range. Energy diffuses rapidly into the material through heat conduction. Therefore, the machine can complete the welding process of melting, evaporation and solidification in milliseconds. Laser welding can not only spot weld and overlap weld, but also butt weld and seal weld. Its principle mainly includes the following aspects:
1. Optical focusing
CNC laser welder uses the laser beam generated by the laser. The beam is focused by optical elements such as lens or mirror, so that the laser energy is concentrated on the welding point.
2. Heat conduction
When the laser beam irradiates the surface of the workpiece, the laser energy will be absorbed and converted into heat energy. Through heat conduction, heat energy is gradually transferred along the metal conductive part of the welded joint, which increases its temperature.
3. Melting and mixing
When the metal surface is exposed to a high enough temperature, the metal begins to melt and form a molten pool. Under the action of laser beam, the molten pool quickly diffuses and mixes. This process can realize the connection of metal joints.
4. Cooling and solidification
Once the laser beam is stopped, the molten pool will gradually cool down. And a welded joint is formed during solidification. During solidification, metal molecules rearrange and crystallize, forming a firm welding connection.
Choose a suitable CNC laser welder
Considering the power of CNC laser welder
The higher the power of CNC laser welder, the higher the laser and cooling system, and the higher the overall price. Of course, the greater the power of the machine, the deeper the welding depth. Operators had better choose the corresponding power according to their own welding requirements. The power of the machine can be used for daily welding work. Otherwise, if the power is too small, the welding is not firm, and if the power is too large, it is not practical.
Considering the laser type
Common lasers are CO2 laser, Nd:YAG laser and fiber laser.
1. CO2 laser can meet the needs of welding thick and thin materials at the same time.
2. Nd: YAG laser has large spot, narrow pulse and wide processing range.
3. Fiber laser can penetrate thick plate at high speed, with stable performance and accurate welding.
Considering the use of CNC laser welder
There are three types of CNC laser welder: manual, semi-automatic and automatic.
Manual CNC laser welder requires operators to control the welding process. Therefore, it is suitable for processing and manufacturing in smaller enterprises.
Semi-automatic CNC laser welder is slightly larger. It is suitable for large and medium-sized enterprises.
Fully automatic CNC laser welder welding is dominated by computer. This method has high welding efficiency. Therefore, it is suitable for large-scale enterprise production.
Consider the brand and price of CNC laser welder
There are many brands of CNC laser welding machines in the market. Good equipment generally uses well-known components or high-quality components. Domestic CNC laser welder is more affordable. Operators need to make reasonable choices according to the budget.
Considering the strength of manufacturers and after-sales service.
The comprehensive strength of the manufacturer is the premise of production and research and development, and also the guarantee of the quality of CNC laser welder. And after purchase, the manufacturer should solve the after-sales problems in time and provide maximum help.
Laser welding machine recommendation
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High-efficiency
Laser energy density is high, and the welding speed can reach several meters per second. This greatly improves the production efficiency.
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High-precision
The laser beam can be focused to a small welding point. The width of welding seam is small and the welding quality is high.
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Stable
Compared with the traditional welding method, it is not easily influenced by external factors, and the welding result is more reliable.
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Environmental protection
Laser welding does not need to use welding agent, no welding dust is generated, and there is no pollution to the environment.
| Laser power |
1000W, 1500W, 2000W |
| Laser source |
Fiber laser |
| Working mode |
Continuous or modulate |
| Laser wavelength |
1080nm |
| Beam quality |
M2<1.2 |
| Standard output laser power |
±2% |
| Line width |
<5nm |
| Cooling system |
Water cooling |
| Working size |
500x300mm |
- Good welding effect The swing welding method and the width of the welding spot are adjustable, and the welding fault tolerance is large. This makes up for the small shortcomings of the laser welding spot, expands the tolerance range and the width of the welding seam, and obtains a better welding seam forming effect.
- 360 degree micro welding It can be used for welding thin-walled materials and precision parts, and can realize spot welding, butt welding, stitch welding, sealing welding, etc. It has features of small welding seam width, small influence area, and small deformation.
- Flexible and convenient The handheld welding gun replaces the previous fixed optical path, which is more flexible and convenient, realizes remote laser welding, and overcomes the limitation of the travel space of the worktable.
| Machine model |
ELE-1000 |
| Max laser power |
1000W, optional: 1500W, 2000W |
| Laser source |
Fiber laser |
| Beam quality |
1.3m² |
| Laser wavelength |
1080±5nm |
| Welding head |
QBH |
| Water chiller |
1.5P |
| Power required |
220V 50Hz 1PH |
| Fiber optical length |
8m |
Conclusion
All in all, the operator must understand the principle of the machine before operating the CNC laser welder. And we have to choose a suitable machine to ensure smooth production. Special requirements of the material or differences in the welding process may result in improper operation of the equipment. Only in this way can a CNC laser welder maintain a good processing effect. Therefore, this machine can bring us efficient and standardized production.
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