| 摘要 |
In an apparatus for machining by the means of a plasma beam a workpiece made of a material of high softening or melting point, especially quartz, glass or a metal, comprising at least three electrodes (7, 8, 9) connected to a current supply of a least three phases (R, S, T) and nozzles (1, 2, 3) transporting by their outlets gas for creating a plasma beam into a field of the electrodes (7, 8, 9), the nozzles (1, 2, 3) receiving in a coaxial arrangement the electrodes (7, 8, 9), the novelty lies in applying the nozzles (1, 2, 3) containing the field creating electrodes (7, 8, 9) in an arrangement characterized by rotational symmetry around a symmetry axis (19) wherein the outlets of the nozzles (1, 2, 3) are placed equidistantly from the symmetry axis (19) of the rotational symmetry, the symmetry axis (19) forming a line within a workpiece (20) to be machined, and the longitudinal axes (13, 14, 15) of the nozzles (1, 2, 3) and electrodes (7, 8, 9) are arranged in an angular range determined with respect to the symmetry axis (19) by maximal inclination +/-15 DEG from a plane perpendicular to the symmetry axis (19). |
