C. Hennigs
M. Hustedt
A. Brode├čer
M. Brose
O. Meier
K. Bescherer-Nachtmann
J. Hermsdorf
S. Kaierle

Realization of laser safety during outdoor laser material processing

Proceedings of the 11th CIRP Conference on Photonic Technologies (LANE 2020)
Type: Zeitschriftenaufsatz (non-reviewed)
Laser safety is of special interest during outdoor material processing using handheld laser devices, e.g. for disassembly tasks or rescue operations. Rough environmental conditions or undesirable bystanders, not familiar with relevant safety rules, reduce the controllability of the working environment. This work presents strategies for the straightforward realization of adequate laser safety for all persons at an outdoor laser-cutting scene. Taking the nominal ocular hazard distance as reference, foreseeable exposure limits are calculated at typical distances from the laser process zone up to 5 m for a fiber-laser power of 2.5 kW. The laser-safety concept developed includes technical-constructive measures, e.g. switches and sensors installed directly at the handheld device, and additional technical measures like specific beam dumps and curtains. Moreover, organizational measures, particularly the allocation of specific safety officers controlling the scene, and personal measures like laser goggles with adapted protection levels are considered. The concept is to be demonstrated under controlled conditions based on accident scenarios.