Because the advantages of laser welding, such as high precision, high efficiency, simple and easy operation, are applied to more and more industries, but there will also be some defects in the welding process, leading to imperfect welding, how to reduce or avoid the emergence of these problems, to see the solution summarized by professional laser welding equipment manufacturers.
Solutions for cracks:
The cracks produced in the welding of laser welding machine are mainly hot cracks, such as crystallization cracks, liquefaction cracks, etc., the reason for this situation is that the weld produces a large shrinkage force before the complete solidification, for this crack can be reduced or eliminated by filling wire, preheating and other measures.
Solutions to air holes:
Most welding is prone to the problem of porosity, this is because the laser welding pool is deep and narrow, the cooling rate is very fast, and the gas generated in the liquid molten pool does not have enough time to escape, resulting in the formation of porosity. However, laser welding cools quickly, and the porosity generated is generally smaller than that of traditional fusion welding. The surface of the workpiece can be cleaned before welding to reduce the tendency of pores, and the direction of blowing will also affect the formation of pores.
Solution to spatter:
The splash produced by laser welding will not only pollute and damage the lens, but also seriously affect the surface quality of the weld. The spatter generation is mainly directly related to the power density, and the appropriate reduction of welding energy can reduce the spatter. If the penetration is insufficient, the welding speed can be reduced.
Solutions for edge biting:
If the welding speed is too fast in welding, the liquid metal behind the small hole pointing to the center of the weld has no time to redistribute, and the solidification on both sides of the weld will form a bite edge. The joint assembly gap is too large, the melting metal of the caulk is reduced, and the edge is easy to be bitten. At the end of laser welding, if the energy decline time is too fast, the small hole is easy to collapse, resulting in local biting, control power and speed matching can be a good solution to the generation of biting.
The solution of five collapses:
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 heavy liquid metal, the weld center will sink, forming collapse and pits. At this time, it is necessary to properly reduce the energy density to avoid the collapse of the molten pool.
The reasons for different laser welding problems are different, and we must first find the reasons for problem analysis in order to find the corresponding treatment. More about the common welding solutions of laser welding machine welcome to visit our website to understand. Our company supply all kinds of laser welding machine, laser cutting machine, laser marking machine equipment, complete models, reliable quality, perfect service, worry free after sale.
Post time: Aug-04-2023