Laser welding is a highly precise and efficient welding process that utilizes the exceptional directional characteristics and high power density of laser beams. This article explores different laser welding techniques.
What are the Types of Laser Welding?
1.Laser Self-Melting Welding
Laser self-melting welding harnesses the excellent directional properties and high power density of laser beams. By focusing the laser beam through an optical system onto a small area, a highly concentrated heat source is generated, rapidly melting the welding material to form robust weld points and seams. Han’s Laser welding offers advantages such as high aspect ratio, high-speed precision, minimal heat input, low deformation, non-contact welding, and immunity to magnetic field interference and vacuum requirements.
2.Laser Wire Filling Welding
Laser wire filling welding involves pre-filling the welding seam with specific welding material, which is then melted through laser irradiation. This method addresses the strict requirements of workpiece processing and assembly, allowing for smaller power welding of thicker and larger components. By adjusting the wire filling composition, control over the organizational performance of the weld seam area is achieved.
3.Laser Flying Welding
Remote laser welding employs high-speed scanning mirror heads for long-distance processing. This method offers high positioning accuracy, short processing time, fast welding speed, and high efficiency. It minimizes interference with welding fixtures, has minimal optical lens contamination, and allows for the customization of weld seams to optimize structural strength. Generally used for thin, high-strength steel plates, galvanized steel plates, and similar products without gas shielding, it tends to produce larger spatters.
4.Laser Brazing Welding
In laser brazing welding, the laser beam emitted by the laser welding machine is focused on the surface of the brazing wire to heat it. The wire is then melted (without melting the base material) to wet the base material, fill the joint gap, and bond with the base material, forming a well-connected weld.
5.Laser Swing Welding
Laser swing welding involves oscillating internal reflective mirrors in the welding head. This controls the laser swing to agitate the welding pool, facilitating gas escape and refining grain size. It also reduces the sensitivity of laser welding to incoming gaps, making it particularly suitable for welding aluminum alloys, copper, and dissimilar materials.
6.Laser-Arc Composite Welding
Laser-arc composite welding combines two distinct heat sources—laser and arc—each with different physical properties and energy transfer mechanisms. This fusion creates a highly efficient heat source. Features of Han’s Laser’s composite welding include enhanced bridging ability compared to laser welding, reduced deformation, high welding speed, and deep melting compared to arc welding. It combines the strengths of both heat sources, creating a synergy that surpasses the individual capabilities of each.
The diverse applications of laser welding techniques across industries demonstrate the versatility and efficiency of this advanced welding technology. From precision welding to long-distance processing, laser welding continues to evolve, offering innovative solutions for various manufacturing challenges.