QCW Fiber Laser Galvo Scanner Welding Machine 300W Precision Micro Welding Low Heat Affected Zone 1070nm

QCW Fiber Laser Galvo Scanner Welding Machine — 300W Precision Micro Welding Platform

The HL-QCW-300G is a QCW fiber laser galvo scanner welding machine engineered for manufacturers who must join thin, heat-sensitive metal parts without warping them. A high-speed two-axis galvo head replaces the conventional X-Y table, so the focused spot travels between weld points in milliseconds instead of seconds. The result is precision micro welding with a low heat-affected zone, repeatable to the micron, on parts that cannot tolerate thermal distortion.

QCW (quasi-continuous wave) operation delivers a long-pulse, high-peak-power output that melts metal cleanly instead of keyhole-vaporising it. Combined with galvo beam steering, the machine places a controlled energy dose exactly where the joint needs it — and nowhere else.

Why the Galvo Head Changes the Economics of Micro Welding

• Millisecond repositioning: the galvo mirror moves the beam across a 100 × 100 mm field at up to 5,000 mm/s scan speed, so dozens of spot welds on one part are completed in a single optical pass with no stage motion.
• No mechanical inertia: no moving workpiece, no acceleration-induced vibration, no backlash — positional repeatability stays within ±0.01 mm over a full 8-hour shift.
• On-the-fly parameter switching: each weld point in the sequence can carry its own power, pulse width and frequency recipe, so a single fixture can weld dissimilar gauges or dissimilar metals.
• Digital recipe library: qualified recipes are stored by part number and recalled in seconds, removing operator-to-operator variation between shifts and between production lines.

Low Heat-Affected Zone: Measured, Not Claimed

Heat input is the enemy of thin-section welding. The 300W QCW source pairs a short, precisely shaped pulse with a small focused spot (0.2–2.0 mm), so the molten pool is formed and solidified before heat can diffuse into the surrounding metal.

Robust, Load-Bearing Joints

Low heat input does not mean weak joints. The QCW pulse profile produces a fine equiaxed grain structure in the fusion zone, and the galvo head delivers a consistent energy density across every point in the pattern. Typical results on production parts:

• Weld strength: joint tensile strength reaches 90–100% of the annealed base metal on 304 stainless and nickel 200.
• Porosity: below 0.5% area fraction on copper-to-copper lap joints with shield gas.
• Seam integrity: leak-tight joints on 0.3 mm stamped enclosures, verified by helium leak test at 1 × 10^-9 Pa·m³/s.
• Repeatability: CPK > 1.33 on weld nugget diameter across a 10,000-piece validation run.

Typical Applications

• Lithium battery tabs and busbars: nickel, nickel-plated copper, aluminium tab-to-busbar
• Sensor diaphragms, pressure capsules and bellows assemblies
• Relay contacts, micro-motor commutators, connector pins
• Medical device cannulas and thin-wall instrument joints
• Watch and jewellery components requiring an invisible weld
• Fuel cell and heat exchanger micro-channel sealing

Technical Specification

Scope of Supply

• QCW fiber laser source, 300 W, with 5 m delivery fiber
• Two-axis galvo scan head and F-theta focusing lens
• Water chiller, foot-switch, protective eyewear and tool kit
• Recipe commissioning for two part numbers, performed on your samples
• English operation manual, wiring diagram and maintenance schedule

Ordering and Support

Samples are welded and micro-sectioned free of charge before you commit to an order: send us your parts and we return weld cross-sections, hardness data and a recommended recipe. Custom fixtures, additional galvo fields and inline automation interfaces are quoted per project. Payback on this machine is typically 6–10 months against outsourced micro-welding or a rework rate above 3%.

Contact us with your material, thickness and joint geometry to receive a welding feasibility report within three working days.