Semiconductor Hybrid Laser Welding Machine for High-Reflectivity Aluminium Plates

The machine combines a semiconductor diode beam with a fiber beam in one optical path. The diode beam preheats the workpiece surface, while the fiber beam delivers deep penetration. This hybrid architecture is purpose-built for high-reflectivity aluminium plates, where single-source fiber welding struggles with back reflection and unstable keyholes.

Aluminium reflects roughly 90% of 1064nm laser energy at room temperature. The result is weak coupling, arc-like spatter and unstable penetration. Our hybrid head raises surface absorptivity before the fiber beam arrives, so the same nominal power produces a far deeper and cleaner weld on aluminium plate.

• Reliable welding on high-reflectivity aluminium - the diode preheat stage lifts absorption, so back reflection into the delivery fiber stays low and the process window stays wide on bare, anodised and brushed surfaces.
• Fewer internal pores - concentric ring beam stirring keeps the keyhole open and lets hydrogen escape before solidification.
• Higher welding speed
• Stable spot energy at high speed - seam width and penetration depth stay constant from the first metre to the last, even during rapid acceleration on gantry and robot systems.

New energy battery trays and busbar-to-cell joints, aluminium heat exchangers, EV motor housings, 5G cavity filters, aluminium doors and frames, and any production line where reflective aluminium sheet or extrusion must be welded without filler wire and without post-weld porosity repair.