ISO 22827-2:2005

Overview

ISO 22827-2:2005 - Acceptance tests for Nd:YAG laser beam welding machines (machines with optical fibre delivery) - Part 2: Moving mechanism defines acceptance and verification tests for the moving/mechanized positioning systems of Nd:YAG laser welding machines. It covers 2D manipulation and limited Z-axis movement, specifies two optional test methods (Type 1 and Type 2) for assessing positioning accuracy, trajectory accuracy, and travel speed, and excludes manually positioned or fixed‑position welding systems.

Key topics and technical requirements

• Two test methods
  • Type 1 test: Rigorous classification and measurement of positioning and dynamic trajectory accuracy; suitable where precise quantification is required.
  • Type 2 test: Simpler marking/inspection method (pattern marking, tape/steel-wire checks) recommended for large-size machines (e.g., 2D moving optics, X–Y tables).
• Classification of moving mechanism into four accuracy classes: A (very high), B (high), C (ordinary), D (low).
• Positioning repeatability and accuracy (examples from standard):
  • Unidirectional repeatability: A/B ±0.01 mm, C ±0.02 mm, D ±0.2 mm
  • Bidirectional repeatability: A ±0.02 mm up to D ±0.4 mm
  • Positioning accuracy per metre: A ±0.05 mm/m up to D ±0.4 mm/m
• Travelling speed accuracy requirements at maximum, minimum and preferred speeds (class-dependent tolerances, e.g., max speed ±2% for A/B).
• Trajectory accuracy tests (rectangles, circles, 45° bevels) with maximum error limits per class; Type 2 uses marking patterns (square + inscribed circle) and measures intersection deviation, meandering, and arc deviation.
• Test conditions and equipment: Measurements made at specified travel speeds, over full travel ranges (sampling every 1 m for long tables), using calibrated instruments (dial gauges, laser measurers, tape, steel wire).

Applications

• Acceptance testing at machine delivery and verification after repairs or modifications that affect motion performance.
• Factory acceptance tests (FAT) and site acceptance tests (SAT) for Nd:YAG laser welding lines using optical fibre delivery.
• Quality assurance for welding procedures that require specific positional and dynamic accuracy (automotive, aerospace, precision fabrication).

Who uses this standard

• Manufacturers and integrators of Nd:YAG laser welding machines
• QA/QC engineers performing FAT/SAT and maintenance verification
• Production engineers specifying welding-procedure requirements that depend on motion accuracy
• Test laboratories and procurement teams evaluating laser welding equipment

Related standards

• ISO 22827-1 (Laser assembly)
• ISO 230-2 (Test code for machine tools - positioning accuracy)
• ISO 15616-2:2003 and ISO/TS 17477:2003 (related laser machine acceptance and trajectory tests)
• ISO 9283 (robot performance - for 3D manipulators)

Keywords: ISO 22827-2:2005, Nd:YAG laser beam welding, moving mechanism, acceptance tests, optical fibre delivery, positioning accuracy, trajectory accuracy, Type 1 test, Type 2 test.