Inner torch

US6667460B2 · kind B2 · utility

Assignee

• Daimlerchrysler AG · US

Inventors

• Detlef Nowotni · Grabenstetten, DE
• Christian Wanke · Senden, DE
• Tilman Haug · Landau in der Pfalz, DE
• Patrick Izquierdo · Ulm, DE

Key dates

• Filing date: Mar 11, 2002
• Grant date: Dec 23, 2003
• Expiry date: Mar 11, 2022

Classification

• Technology area (CPC H): Electricity
• CPC primary: H05H1/42
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

An inner torch for the electric-arc spraying of cavities, in particular of cylinder contact surfaces. The inner torch as at least two torch tubes for heating electrodes. The electrodes are provided for melting purposes and are designed as wires which can be burned away in an electric arc. The inner torch also has a gas feed for a process gas which is provided for transporting and spraying the molten wire material in the direction of the cavity surface which is to be coated. The wires are guided towards one another, by way of the torch tubes, wherein at the outlet and in the region of the electric arc, the electric arc of the electrodes wires, which is arranged in the contact region of the wires, is arranged in the region of the flow of the discharged process has, referred as the main gas arranged transversely to the main transporting direction of the wires. Furthermore, in addition to being bent towards one another, the wires are also bent transversely to this direction.