ARC PLASMA GENERATOR AND A PLASMA ARC APPARATUS FOR TREATING THE SURFACES OF WORK-PIECES INCORPORATING THE SAME ARC PLASMA GENERATOR

摘要

ABSTRACT OF THE DISCLOSUREAn arc plasma generator comprises a consumablecathode, a cylindrical anode, and a focusing solenoid arrangedcoaxially with the consumable cathode. A power unit formaintaining the arc is electrically connected to the con-sumable cathode and the anode. In accordance with the in-vention the arc plasma generator further comprises a tubularplasma guide connected to an end face of the anode and anelectromagnet. The electromagnet is arranged in the tubularplasma guide on the axis thereof and is enclosed in a housingmade of a nonmagnetic material and having a cross-sectionalarea sufficient to conceal the cathode from the viewer'ssight, looking in the direction of the cathode through theplasma guide. Also, the focusing solenoid is arranged onthe tubular plasma guide and is connected in opposition withthe coil of the electromagnet. A plasma arc apparatus fortreating the surfaces of work-pieces comprises an arc plasmagenerator of the invention and an assembly for holding thework-piece to be treated. The assembly is a cover having acentrally-disposed opening. The cover is fixed on the endface of the plasma guide. The apparatus is also providedwith a disk coil attached to the cover and connected in anaiding manner with the focusing solenoid. The inventionprovides for an effective removal of macroparticles fromthe plasma flow to improve the treatment of the surfaces ofwork-pieces.