Patent ID: 7759602
Filing Date: 2010-07-20
Classification: B23K

Abstract:
1. A laser processing head comprising: nozzle-holding means for holding a nozzle in which a nozzle hole is formed; condensing optical system-holding means for holding a condensing optical system, said condensing optical system-holding means being slidably arranged in said nozzle-holding means while maintaining sealing; moving means for slide-moving said nozzle-holding means and said condensing optical system-holding means relative to each other; assist-gas feeding means for feeding an assist gas into a laser processing head chamber formed between said condensing optical system of said condensing optical system-holding means and said nozzle hole of said nozzle-holding means; passages formed in said nozzle-holding means to communicate said laser processing head chamber with the exterior of said nozzle-holding means; slide members that slide in said passages while maintaining sealing; and coupling means for coupling said slide members to said condensing optical system-holding means.