Views: 89 Author: Site Editor Publish Time: 05-23-2024 Origin: Site
In metal processing and manufacturing, laser welding technology is widely used because of its high precision, high efficiency and low deformation. Many people may have questions about whether laser welding machines use welding wire. This article will explain in detail from many aspects.
The working principle of laser welding machine is not complicated. A laser is used to generate a high-energy laser beam, which is focused and irradiated onto the surface of the material to be welded. The energy of the laser beam causes the metal surface to rapidly heat up and melt, forming a liquid molten pool. Finally, the metal in the liquid molten pool gradually cools and solidifies, thereby realizing the connection between metals.
Welding wire is a filler metal. Added to welds during welding to bridge the distance between the materials being welded. The main function of welding wire is to fill the weld, enhance the mechanical strength of the weld and improve the chemical composition of the weld.
In most cases, laser welding machines do not need the use of welding wire. Because laser welding uses a laser beam to directly act on the metal surface to melt and join them together, no extra filler material is required. Yet, in some cases welding wire may be used as filler material. If it is necessary to increase the mechanical strength of the weld or improve the chemical composition of the weld.
In the laser welding process, whether we need to use welding wire mainly depends on the following conditions:
Strength and sealing requirements of the weld: If the weld needs to bear a large load or needs to maintain sealing, welding wire is also required in this case.
Chemical composition requirements of the material: In some special cases, it may be necessary to change the chemical composition of the weld by adding welding wire to meet specific performance requirements.
Welding process requirements: Some welding processes need the use of welding wire to achieve specific welding effects. Such as laser filler wire welding, etc.
Different materials have different requirements for welding wire. When choosing welding wire, you need to consider the following factors:
The chemical composition of the welding wire should match the chemical composition of the material being welded.
Example: In the manufacture of stainless steel products, it is sometimes necessary to change the chemical composition of the weld to meet specific corrosion resistance requirements. Now, welding wires containing different alloy elements can be used for welding. An alloy layer with a specific chemical composition is formed to improve the corrosion resistance of the workpiece.
The melting point of the welding wire should be lower than the melting point of the material being welded, so that it can fully melt and fill the weld during the laser beam welding working.
Example: Zinc alloys have extremely low melting points, and although fiber optic laser welder can handle low melting point metals, welding wire may be used in certain situations, such as when repairs or to increase the strength of a weld are required.
The mechanical properties of the welding wire should meet the mechanical property requirements of the material being welded to ensure the strength and toughness of the weld.
Example: Cast iron is brittle and easy to crack, and cracks are prone to occur during welding. To improve the quality of the weld and reduce cracks, welding wire needs to be used for filling. Welding wire selection takes into account compatibility with cast iron and ability to reduce crack susceptibility.
In the cnc laser welder process that requires the use of welding wire, the selection of wire feeding equipment is also crucial. The main function of the wire feeding equipment is to accurately deliver the welding wire to the weld. And ensure that the feeding speed and angle of the welding wire match the welding process. When choosing wire feeding
equipment, you need to consider the following factors:
Wire feed speed: The wire feed speed should match the welding speed to ensure that the welding wire can fully melt and fill the weld.
Wire feeding angle: The wire feeding angle should be adjusted according to the requirements of the welding process to ensure that the welding wire can be accurately added to the weld.
Wire feeding accuracy: Wire feeding accuracy directly affects the quality and performance of the weld, so wire feeding equipment with high precision should be selected.
To sum up, laser welding machines do not must the use of welding wire in most cases. Yet, in special cases, welding wire may be used as filler material. When selecting welding wire and wire feeding equipment, comprehensive considerations need to be made to ensure the quality and performance of the weld.
