Overview
EN ISO 22827-1:2005 - Acceptance tests for Nd:YAG laser beam welding machines (Part 1: Laser assembly) defines basic requirements and test methods for acceptance testing of high‑power Nd:YAG laser welding systems with optical fibre delivery. It applies to lamp‑pumped and laser‑diode‑pumped machines with average power >100 W and covers the beam generating system, optical delivery system, and devices for shielding and assist gases. (The moving mechanism is handled in ISO 22827‑2.)
Key topics and technical requirements
- Scope and applicability: Acceptance testing at delivery and verification after major maintenance or modifications.
- Environmental & operating conditions: Proper installation in welding cells, voltage supply within ±10% of specified value, cooling system water quality/flow/temperature per manufacturer requirements, and control of vibrations/temperature.
- Laser power testing:
- Power and temporal measurements in accordance with ISO 11554.
- Stability classification A–D with quantitative limits:
- Class A/B/C/D stability at max/min rated power: ±1.5% / ±2.5% / ±5% / ±10%.
- Warm‑up period: at least 30 minutes; stability measurements over up to 20 minutes at max and min power.
- Optical delivery & fibre checks:
- Measure beam power before and after the optical system (fibre + final optics) and verify specified power loss.
- Verify optical fibre bending curvature does not exceed specified limits along entire length.
- Optical observation accuracy: Monitor-to-beam alignment requirements (accuracy ranges given in the standard).
- Gas systems: Tests for pressures and flow rates of shielding and assist gases per welding procedure.
- Safety & documentation: Beam safety tests, supply of operating instructions, record keeping and test reports (examples and optional parameters in annexes).
Applications and typical users
This standard is used for:
- Manufacturers and OEMs of Nd:YAG laser welding machines for acceptance testing before delivery.
- System integrators and contract manufacturers validating laser cells with optical fibre delivery.
- Quality managers, plant engineers, and test laboratories performing verification, maintenance checks or after repair acceptance testing.
- Safety engineers ensuring compliance with machine and laser safety (links to IEC 60825‑1 and ISO 11553‑1).
Related standards
Keywords: EN ISO 22827-1:2005, Nd:YAG laser beam welding machines, optical fibre delivery, acceptance tests, laser assembly, laser power stability, welding equipment.