Double Wobble Blue Light Hybrid Welding Head 70% Absorption Spatter Free Seam for Copper

This double wobble blue light hybrid welding head couples a blue laser with a fiber laser. A dual-axis wobble scanning unit moves both beams across the joint, so the energy that reaches the workpiece is spread evenly instead of being concentrated in one spot. The result is a head that is easier to parameterise, more forgiving on real production parts, and considerably less demanding on the laser source behind it.

Copper, copper alloys and other high-reflective metals absorb blue light at roughly 70%, a level infrared wavelengths cannot reach at room temperature. Because the material accepts energy instead of reflecting it away, a stable molten pool forms at a much lower power setting. Integrators can therefore specify a smaller blue or fiber source for the same joint, which directly lowers laser source cost, chiller load, power consumption and cabinet footprint. The lower power ceiling also reduces thermal distortion on thin sections and shortens the ramp-up time at the start of each seam.

The wobble motion keeps the keyhole open and the melt flow continuous, which suppresses the droplet ejection that normally causes spatter. Parts come out of the fixture clean, so there is no spatter to grind off, no protective lens contamination and far less downtime for cleaning. Weld seams stay smooth and uniform along their full length, with consistent penetration from the start to the end of the run. Reduced lens soiling also extends consumable life in multi-shift production.

Full penetration is achieved from one accessible side only, while the root on the reverse side forms cleanly without a backing bar. Closed profiles, tubes, battery housings and sealed enclosures can therefore be welded without turning the part or adding a second pass. This removes a handling step from the process, shortens cycle time and avoids the re-clamping error that a two-sided operation introduces.

Oscillating both axes enlarges the effective melt pool and bridges fit-up variation that a static beam would fail on. Stamped parts, laser-cut blanks and formed profiles with inconsistent gaps can be welded with the same program, which reduces fixture precision requirements and scrap rate. The adjustable beam pattern can be matched to butt, lap, corner and fillet joints, and parameters for different jobs can be stored in the controller for fast changeover.

• Copper and copper alloy busbars, tabs and connectors
• New energy battery modules, packs and cell interconnects
• Aluminium and stainless steel enclosures, cabinets and housings
• Thin sheet welding where spatter and post-grinding must be avoided
• Automated and robotic welding cells requiring repeatable gap bridging
• Motor, heat exchanger and electrical component assembly