MACHINING HEAD OF LASER BEAM MACHINE

摘要

PROBLEM TO BE SOLVED: To surely prevent spatter and dust from sticking to a surface of a condensing lens. SOLUTION: The machining head is arranged with a condensing lens 12 in a lens holder 11 and a guide ring 17 near the condensing lens 12. A gas introducing port 19 introducing assist gas is formed to the lens holder 11 at an outer periphery of the guide ring 17. A guide part 20, by which assist gas is blown from a whole outer periphery of the guide ring 17 to the condensing lens 12 surface, is formed to a tip part of the guide ring holder 14.