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What to pay attention to when working with hand-held laser

Views:0     Author:hu     Publish Time: 2021-08-28      Origin:dapeng

What to pay attention to when working with hand-held laser welding: the welding seam is yellow, and the air pressure may not be adjusted properly

Laser welding is the second largest laser processing application technology after laser cutting. In recent years, driven by the demand of new energy vehicles, semiconductors, power batteries and other emerging industries, the laser welding market has seen rapid growth. In this process, major manufacturers have sensed new opportunities for future development, and relevant upstream and downstream brands have accelerated their layout in this process, and the industry has gradually shown a scene of fierce cooking oil.


At present, handheld laser welding equipment has begun to enter the workshops of major, medium and small manufacturers, and has become a new outlet for laser welding. More new players want to know the relevant technical parameters of laser welding. We also encountered a lot in the consultation process. For similar issues, for this reason, this article is hereby to resolve questions for some users for reference.


Laser power


Laser power is one of the main parameters of laser welding. The laser power determines the energy density of the laser. For different materials, the threshold is also different. The laser power is not as high as possible. For laser welding, too high laser power may melt through the material; but too low power will not work. If the power is not enough, the material penetration is insufficient, and only the surface is melted. The welding effect.


Carbon steel welding effect

welding: the welding seam is yellow, and the air pressure may not be adjusted properly

Laser focus


Focus adjustment also includes focus size adjustment and focus position adjustment, which is one of the main variables of laser welding. Under different processing environments and processing requirements, facing different weld seams and depths, the required focus size is also different; The relative position change between the focal point and the workpiece processing point directly affects the quality of welding. Generally speaking, the adjustment of focus data needs to be carried out in a targeted manner in accordance with the on-site situation.


Welding speed


In hand-held laser welding operations, the welding speed mainly refers to the speed at which the operator moves the welding head, and this speed is closely related to parameters such as laser power and wire feeding speed. First of all, the welding speed is too fast or too slow. If the welding speed is too fast, the penetration will be insufficient and the welding quality will be poor. If it is too slow, the material may be melted through. The welding power should be compared with the welding power.


Stainless steel welding

welding: the welding seam is yellow, and the air pressure may not be adjusted properly

What can be assured is that although the uniform motion seems to be very demanding, in actual operation, it is easy to find the ideal welding speed after repeated trials. Compared with traditional welding workmanship, handheld laser welding is quick to start and easy to adapt. This is also one of its biggest advantages.


Protective gas


There are two main functions of the shielding gas: 1. Exclude the air in the local area of the welding and avoid the appearance of oxide film on the surface of the material; 2. Suppress the plasma cloud generated during high-power laser welding.


Stainless steel wireless welding

welding: the welding seam is yellow, and the air pressure may not be adjusted properly

In the actual operation process, the most intuitive effect of the shielding gas is the change of the weld color. In the process of stainless steel welding, if the shielding gas pressure is insufficient, or the welding speed is too fast, the gas coverage is not enough, it is easy to cause the welding seam to turn yellow and black, and the aesthetics will be greatly reduced. Similarly, if you want to adjust the shielding gas parameters correctly, basic equipment debugging is indispensable. During the debugging process, you must pay attention to controlling the changes in the welding speed to avoid multiple repetitions of problems.


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Dapeng laser specializing in R&D, manufacturing laser marking, cutting and welding machines, we also provides Laser sources and spare parts to the laser machine manufacturers in China and surrounding countries.
 

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