초록

A surface of a workpiece is treated by electric discharge. In particular, a concentrated plasma jet is generated through an arc discharge by a non-transferred electric arc while feeding--in a working gas. The surface of the workpiece to be treated is brushed over by the plasma jet.

대표청구항 ▼

[ What is claimed is:] [1.] A jet generator for treating a surface of a workpiece, comprising:an electrically insulative nozzle pipe having an internal diameter forming a flow channel for working gas, the flow channel having a center axis;a pin electrode disposed within the nozzle pipe adjacent a re

[ What is claimed is:] [1.] A jet generator for treating a surface of a workpiece, comprising:an electrically insulative nozzle pipe having an internal diameter forming a flow channel for working gas, the flow channel having a center axis;a pin electrode disposed within the nozzle pipe adjacent a rear end of the flow channel; anda ring electrode extending across a froward end of the flow channel and forming a nozzle opening arranged substantially coaxially with the pin electrode, the nozzle opening being spaced forwardly from a tip of the pin electrode by a distance which is at least two times the internal diameter of the nozzle pipe, the pin electrode and the ring electrode arranged to form an arc within the flow channel;the flow channel being communicable with a source of working gas and configured to cause the gas to flow in a vortex-shaped path through the nozzle pipe and the nozzle opening from an inlet located adjacent the rear of the flow channel, to constrain the arc to extend along the center axis while passing through the nozzle pipe, the arc generating from the working gas a plasma discharge which forms a concentrated jet of a reactive medium extending from the nozzle opening.