1. Product Overview

1.1 Summary

Laser welding is a cutting-edge technology in laser material processing, specialized in welding thin-walled components and precision parts. It uses a heat conduction welding method, where laser radiation heats the workpiece surface and thermal energy penetrates the material via conduction.

By precisely controlling parameters such as pulse duration, energy intensity, peak power, and repetition rate, it forms controlled molten pools for:

• Spot welding

• Butt welding

• Lap welding

• Seal welding

Advantages of this process:

• High depth-to-width ratio, narrow weld seams

• Minimal heat-affected zone and deformation

• Fast operation with smooth weld surfaces

• Post-welding maintenance-free or low-maintenance

• Focused light beams and high positioning accuracy

• Seamless integration into automated workflows

1.2 Main Technical Features

• Stable and uniform laser spot after fiber transmission improves weld quality

• Small focused spot with high power density, optimized for mold repair

• Special chiller ensures stable long-term high-power welding

• Gas protection system maintains product color and weld quality with argon protection

• Double-joint boom with swivel casters and three-axis rocker arm allows flexible movement without moving the mold

• 360° laser head rotation and electric lift enable welding on all sides

• Dedicated welding control system with LCD touchscreen: easy to operate and learn

• Expandable system compatible with automation devices such as production lines, photoelectric detectors, and pneumatic fixtures

1.3 Advantages Over Traditional Pulse Mold Welding

1. No consumables (no tubes), maintenance-free

2. Lower average power consumption

3. Wider melting range (e.g., stainless steel 0.1–1.0 mm), laser stable without beam wandering

4. Special chiller ensures long-term high-power welding stability

5. Objective lens water cooling protects optics during extended use

6. Deep, firm welds, fully melted, no air holes or sand holes, aesthetically pleasing repair

1.4 Product Models and Technical Parameters

1.5 Workplace Requirements

1. Ambient temperature: 5–35°C (air conditioning recommended)

2. Humidity: 40–80%, no condensation (dehumidifier recommended)

3. Power supply fluctuation: <5%; use voltage stabilizer if >5%

4. Foundation vibration: amplitude <50 μm, acceleration <0.05 g; avoid large stamping machines

5. Air pressure: 86–106 kPa

6. Avoid strong electromagnetic interference, radio transmitters nearby

7. Workspace: smoke-free and dust-free; avoid environments with metal polishing dust

8. Anti-static measures: optional static shielding, grounded equipment

9. Cooling water: add antifreeze if ambient <0°C; drain water when machine stops

1.6 Machine Structure and Working Principle

The laser welding machine consists of:

• Laser power supply

• Optical system

• Cooling system

• 3D worktable

It emits 1080 nm pulsed laser through fiber optics, which is transmitted, expanded, and focused on the workpiece. Microcontroller-controlled pulse frequency and width regulate laser power and energy delivery.

Advantages of QCW fiber laser:

• High electro-optical conversion efficiency

• Compact structure, maintenance-free

• Flexible fiber output for small diameter soldering

• Simple wiring and operation via LCD

• High-precision QBH fiber; optional 10 m fiber

• External communication for monitoring and centralized management

2. Main Components (Chapter 3 Preview)

• QCW Fiber Laser

• Safety Features: Class IV laser, 1080 nm, OD≥5 protection goggles required

• Operation Tips: check cables, connectors, and grounding before powering on

• Avoid flammable substances and ensure ventilation