Plasma cutting system
US4670640A · kind A · utility
Inventors
Key dates
| Filing date | Dec 16, 1985 |
| Grant date | Jun 2, 1987 |
| Priority date | — |
| Expiry date | Dec 16, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K10/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Apparatus for cutting a metallic body in a predetermined and repeating pattern. A plasma torch and the metallic body are moved relative to each other. The relative movement includes a cutting relative movement in accordance with the predetermined pattern and a return relative movement in accordance with a repeat of the predetermined pattern. The metallic body serves as an operating anode during the cutting relative movement while a holding anode is provided for use during the return relative movement. The plasma torch is positioned in plasma retaining relation with the holding anode during the return relative movement. In a preferred embodiment, the power to the plasma torch is reduced during the return relative movement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.