New Applications of Handhheld Laser Welding Machinery

    With the advantages of high efficiency, high precision, good effect, easy automation and integration, fiber laser handheld welding machines are widely used in various industries, and play a pivotal role in industrial manufacturing, including military, medical, aerospace, and 3C Auto parts, mechanical sheet metal, new energy, bathroom hardware and other industries.

    However, if any processing method does not master its principles and processes, certain defects or defective products will be produced, and laser welding is no exception. Only by having a good understanding of these defects and learning how to avoid them can the value of laser welding be brought into full play and products with exquisite appearance and high quality can be processed. Abedar Laser has focused on laser welding equipment for more than 20 years. Through long-term experience accumulation, application engineers have summarized some common welding defects solutions for users' reference:

1. Crack

The cracks produced in fiber laser welding continuous welding are mainly thermal cracks, such as crystallization cracks, liquefaction cracks, etc. The main cause is the large shrinkage force of the weld before it is completely solidified. Measures such as wire filling and preheating can be reduced Or eliminate cracks

2. Stoma

Porosity is a defect that is more likely to occur in laser welding. The molten pool of laser welding is deep and narrow, and the cooling rate is very fast. The gas generated in the liquid molten pool does not have enough time to escape, which easily leads to the formation of pores. However, laser welding cools quickly, and the pores produced are generally smaller than traditional fusion welding. Cleaning the surface of the workpiece before welding can reduce the tendency of pores, and the blowing direction will also affect the generation of pores.

3. Splash

The spatter produced by laser welding seriously affects the surface quality of the weld seam, and can contaminate and damage the lens. Spatter is directly related to power density. Appropriate reduction of welding energy can reduce spatter. If the penetration is insufficient, the welding speed can be reduced.

4. Undercut

If the welding speed is too fast, the liquid metal at the back of the small hole pointing to the center of the weld will not have time to redistribute, and it will solidify on both sides of the weld to form undercuts. If the joint assembly gap is too large, the molten metal in the joint filling is reduced, and undercut is also easy to occur. At the end of laser welding, if the energy fall time is too fast, the small holes are easy to collapse, causing local undercuts. Controlling the power and speed to match can solve the undercuts.

5.Collapse

If the welding speed is slow, the molten pool is large and wide, the amount of molten metal increases, and the surface tension is difficult to maintain the heavier liquid metal, the center of the weld will sink, forming collapses and pits. At this time, it is necessary to appropriately reduce the energy density to avoid The molten pool collapsed.

A correct understanding of the defects produced in the laser welding process and understanding of the causes of different defects can be more targeted to solve the abnormal weld seam problem of laser welding. 

Therefore,we recommend our hot selling handheld laser welding machine 1000W/1500W power as below:

Please inform the mainly application,such as welding material/thickness/joint or repair,we will provide you full information with best solution!