PURPOSE: To make a titled torch small in size, light in weight and easy to handle by disposing a nozzle cap via an insulator on the outside circumferential part of a nozzle, and ejecting mixed fluids of water or steam from cooling water outflow passages directed toward the plasma arc.
CONSTITUTION: A material 18 to be cut is cut at a cutting end 18a by the plasma arc 19 generated in the atmosphere of a working gas 14 supplied into a nozzle 4. At this time, the cooling water 9 supplied to a cooling water flow passage 8a through a water flow pipe 10 is released to the circumference of a nozzle hole 5 via cooling water outflow passages 8b, 8c. When the cooling water flows through the passages 8b, 8c, it is atomized and evaporated by the ultrahigh temp. gaseous flow of the gas 14 and the arc 19, so that the mixed fluids of the water, mists and steam act so as to enclose the circumference of the arc 19. The energy density of the arc 19 is improved by thermal pinch effect, and the cut surfaces are made in high quality.
| WO/2013/139484 | PLASMA ELECTRODE FOR A PLASMA ARC TORCH WITH A REPLACEABLE ELECTRODE TIP |
| WO/1998/039953 | METHOD AND DEVICE FOR PRODUCING PLASMA |
TAGUCHI HIRONARI
HANEDA MITSUAKI
YAMAMOTO KOUTAROU
SHIMADA MINORU
OZAKI KIYOUICHI
HITACHI SEIKO KK
| JPS53123349A | 1978-10-27 |