Plasma arc cutting of conductive and non-conductive materials

Details Plasma arc cutting of conductive and non-conductive materials Plasma arc cutting of conductive and non-conductive materials

1991-09-12

1993-05-04

Paschall, Mark H.

Electric heating

Metal heating

By arc

219121, 219 39, 21912159, B23K 900

Patent

active

052084400

ABSTRACT:
A system and method for cutting insulation and metal using a plasma arc is provided. The system includes a plasma arc cutter for cutting sheets of insulation and metal. The plasma arc cutter has a torch adapted to constantly arc. The sheets of insulation and metal are positioned below the torch. The method of cutting insulation and metal uses the plasma arc cutter system to cut sheets of insulation and metal. In accordance with a preferred embodiment of the method of the invention insulation and metal are cut without vertically moving the torch of the plasma arc cutter system. A rolling table of a plasma cutting system is loaded with a sheet of insulation. The table is rolled to move the sheet of insulation into cutting position below the torch. The sheet of insulation is cut and then removed by rolling table out from under the torch, loading a sheet of metal onto the table and rolling it under the torch. The tip of the torch has an electrical ground. As the torch is moved over the insulation sheet the current transfers to the ground in the tip. As the torch is moved over the metal sheet the current transfers to the metal as ground. As the torch is moved off the metal sheet the current transfers to the ground in the tip.

REFERENCES:
patent: 4194106 (1980-03-01), Rudaz et al.
patent: 4495399 (1985-01-01), Cann
patent: 4691090 (1987-09-01), Garlanov et al.
patent: 4740668 (1988-05-01), Perez
patent: 4792657 (1988-12-01), Conley
patent: 4880958 (1989-11-01), Conley

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