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Laser welding is an advanced joining technology that combines modern science with traditional techniques, yet offers distinctive advantages over conventional arc welding. It delivers immunity to electromagnetic interference, narrow welds, a small heat-affected zone, smooth and clean weld surfaces, high joint strength, contactless operation, no reflow disturbance, and high machining precision.

The video below from Wikipedia illustrates the advantages and development history of laser welding.

Constrained by equipment costs, laser welding has for a long time been used only in automotive production, aerospace, and high-end manufacturing.

In recent years, however, breakthroughs in domestic laser-welding technology and dramatic equipment-cost reductions have made laser welding accessible across industries. Many traditional welding scenarios, such as argon-arc welding, are being replaced by laser welding.

To help users deploy laser welding more conveniently and efficiently and to broaden the adoption of robotic laser welding, iNexBot has launched a dedicated laser-welding system. By pairing domestic robots with the iNexBot system, a laser-welding process upgrade can be achieved with minimal effort.

The iNexBot laser-welding system provides built-in PWM output, requiring no dedicated PLC or control devices. Compared with conventional welding, it is simpler and cleaner. For previous laser-welding setups, dynamic power, intelligent wire feeding, and PWM high-speed pulse control have been added, making the welding process smarter, faster, and more stable.

System Highlights

Dedicated Laser-Welding Instructions

Traditional robotic laser welding relies on a PLC for control, which inevitably requires extensive PLC programming and a large number of IO calls — extremely complex.

The iNexBot robotic laser-welding system comes with built-in laser-welding-specific instructions, fully replacing PLC programming. With only a few lines of code, the system works out of the box. The interface has been comprehensively optimized to help users build programs quickly, and it also includes spot-welding-specific instructions.

Expert Parameters

After in-depth research on laser welding, iNexBot has distilled the expert parameters required and packaged them into a clean, efficient parameter UI. The parameters are easy to understand; while enabling rapid deployment, complex laser-welding scenarios can also be supported with high customizability.

High-Precision Welding

Benefiting from the iNexBot control system's dynamics-based motion-control algorithm, the robot suppresses vibration and maintains high precision even at high speed. This fully unlocks the potential of high-speed, high-precision laser welding.

Dynamic Laser-Power Adjustment

Laser welding is prone to undercut — where the weld does not bond well with the parent material, producing a slope. Problems such as excessive temperature at the crater and insufficient starting temperature can also appear. These are caused by mismatched welding speed and power during the laser-welding process. The iNexBot laser-welding system has built-in dynamic laser-power adjustment to address these issues completely.

With/without dynamic adjustment comparison

Dynamic Wire-Feeding Speed Control

Some laser-welding scenarios produce hot cracks (such as crystal cracks and liquefaction cracks). In such cases, filler-wire welding is needed to reduce or eliminate the cracks.

With conventional wire feeders, once welding begins, wire-feed speed becomes uncontrollable, easily causing wire buildup. iNexBot has developed real-time controllable wire-feed speed to ensure a clean, aesthetic weld.

Fine Power Control

A major advantage of laser welding is that, by modulating power, the metal surface temperature is kept near the boiling point, avoiding metal spatter and porosity during welding.

The iNexBot laser-welding system supports both analog-quantity and PWM (high-speed pulse) control modes, so the laser power density on the metal surface can be precisely controlled, and laser precision can be conveniently tuned for different parent materials.

Laser Vision Tracking and Positioning

Laser welding is known for high-precision joining, but the higher precision requirements mean that the parent material must also be precisely positioned, which poses significant challenges in real-world manufacturing environments.

The iNexBot laser-welding system has built-in laser vision tracking and positioning. Combined with laser welding, it can automatically locate the seam, automatically compensate for workpiece-positioning deviations, and make the welding process more efficient and the deployment faster.

Dynamic Galvanometer Beam Shaping

The same workpiece may have multiple welds of different sizes, requiring different spot sizes and shapes. To avoid having to manually adjust the galvanometer head after each weld, iNexBot has built-in dynamic galvanometer beam shaping. Combined with dynamic power adjustment, it keeps the power density on the metal surface constant when changing spot area and shape, so weld quality remains consistent across all welds.

Secondary Development System

For users' specific needs, iNexBot provides a laser-welding secondary development kit that contains pre-packaged laser-welding functions. Users can develop their own laser-welding interface to make the laser-welding process their own. iNexBot Open Platform