Laser-beam operated machining apparatus

摘要

A laser-beam operated machining apparatus capable of performing machining operations on a high-reflectivity material such as aluminum or copper. A nozzle is provided for applying a focused laser beam together with an assist gas to a surface of a workpiece to be machined. An annular electrode is provided on the end of the nozzle confronting the workpiece with the electrode being coaxial with the laser beam. An arc discharge is created between the annular electrode and the workpiece by applying a voltage between the annular electrode and the workpiece so as to cause an arc discharge therebetween.