DERATECH
The handheld laser welding machine is a highly efficient welding device that operates based on the thermal effect of a laser beam. Below is a detailed explanation:
- Main Components and Functions of the Handheld Laser Welding Machine:
System: Adjusts power, weld seam width, wire feeding, and other functions.
Laser Source: Generates a high-energy laser beam.
Welding Gun: Delivers the laser beam to the welding area.
Water Chiller: Provides circulating cooling water to prevent overheating of the laser source and welding gun.
- Laser Generation and Transmission:
The laser source is the core component of the device. Common fiber lasers use ytterbium-doped (Yb) fibers as the gain medium, offering high electro-optical conversion efficiency with an output wavelength of 1064 nm (near-infrared).
The laser is transmitted to the welding gun head through a flexible optical fiber, typically with a core diameter of 50–200 μm, ensuring efficient energy delivery.
Inside the welding gun, collimating and focusing lenses concentrate the laser beam into a very small spot, achieving an energy density of 10⁶–10⁷ W/cm².
- Welding Process:
When the laser beam irradiates the workpiece surface, the metal absorbs the optical energy and rapidly heats up to its melting point, forming a molten pool.
The high energy density causes partial vaporization of the metal, generating vapor pressure that creates a deep and narrow “keyhole” weld seam, with penetration depths of 0.5–5 mm.
Argon or nitrogen gas is expelled from the welding gun nozzle to shield the molten pool from oxidation and nitridation.
Some models are equipped with an automatic wire feeding mechanism, delivering welding wire into the molten pool to enhance weld strength.
- Control System:
Power Adjustment: Adjusts laser output according to material thickness.
Swing Welding: Uses a galvanometer to control beam oscillation, widening the weld seam.
Human-Machine Interface: Touchscreen for parameter settings.
您好！Please sign in