Introduction

As industrial manufacturing continues to evolve toward higher precision, reliability, and sustainability, welding processes face increasing demands for material versatility and process refinement. Laser welding, a core technology in high-end equipment production, must now address complex material compatibility and ultra-fine processing requirements.

Han’s Laser, leveraging nearly 30 years of expertise in laser source development and interdisciplinary innovation, has introduced the Concave Digital Ring QCW Laser. This advanced system provides strategic industries—such as power batteries, precision electronics, and new energy vehicles—with welding solutions that combine high performance with low environmental impact.

Technology Overview

The Concave Digital Ring QCW Laser integrates an asymmetric concave gradient power distribution with a dual-channel digital arbitrary waveform generator to create a composite energy field control system. By precisely manipulating spatial, temporal, and frequency parameters, it enables multi-dimensional, complex welding processes.

This laser can rapidly deliver extremely high peak power in short bursts, allowing materials to melt smoothly and evenly, achieving the desired weld quality. The laser welding system supports pulse, continuous, and modulated output modes, ensuring flexibility across diverse welding applications.

Core Advantages

1.Power Stability

• Even minor energy fluctuations in spot welding can lead to penetration failure, voids, or weak welds.
• After 10 hours of continuous aging tests, overall power instability remains below ±0.8%, with 24-hour variation under ±1%, ensuring consistent weld quality in high-speed production environments.

2.Programmable Energy Density Distribution

• Unlike traditional QCW lasers with fixed energy distribution, the concave digital ring design allows programmable energy patterns.
• The system adapts to thin plates, thick plates, and high-reflectivity materials such as copper and aluminum, supporting flexible “one machine, multiple applications” manufacturing.

3.Energy Efficiency and Environmental Benefits

• Optical-to-electrical conversion efficiency reaches ~40%, reducing operational costs by 85% compared to high-power YAG lasers.
• Average power consumption is only 10% of conventional ring lasers, with total energy use reduced to 30%, supporting sustainable, low-carbon manufacturing.

4.Compact, Intelligent, and Safe

• Weighing just 150 kg, the system supports rapid deployment and easy repositioning.
• Equipped with tri-color status indicators, hardware laser locks, an integrated touchscreen, and remote control interface, the laser enables immediate operation and full-process monitoring for digital factory integration.

Spot Welding Capabilities

The Concave Digital Ring QCW Laser sets new standards for precision spot welding in critical components:

• Deep penetration with minimal heat-affected zones.
• Narrow welds preserving the base material structure.
• Minimal spatter for improved surface quality.
• Controlled porosity enhancing structural reliability.
• Stable, repeatable processes suitable for long-term, continuous production.

Application Examples

1.Sealing Pin Welding

• Achieves over 99.8% yield while optimizing efficiency and energy consumption.
• Y-shaped weld morphology maximizes fusion area, improving safety and lifecycle in power battery applications.

2.Copper Heat Sink Spot Welding

• High-reflectivity copper components pose challenges for pulse laser welding due to low absorption.
• The concave digital ring QCW laser stabilizes temperature below 70°C, eliminates weld explosions, and maintains micrometer-level dimensional control, meeting stringent precision electronics requirements.

3.Aluminum Alloy Welding

• Cast aluminum often exhibits inconsistent composition and internal porosity, leading to weld quality variability.
• Customized waveform control effectively suppresses porosity, minimizes deformation, and provides reliable connections for aerospace and automotive lightweight structures.

Conclusion

Han’s Laser focuses on laser sources and advanced process development, providing industrial users worldwide with high-quality, versatile laser welding solutions. The Concave Digital Ring QCW Laser exemplifies the company’s commitment to precision, intelligence, and sustainability, enabling manufacturers to meet modern industrial demands while minimizing environmental impact.

The product portfolio includes QCW/CW fiber lasers, semiconductor lasers, YAG lamp-pumped lasers, and short-wavelength high-power green and blue lasers, supported by numerous domestic and international patents and software copyrights. Han’s Laser continues to drive the laser industry toward a more refined, intelligent, and sustainable future.