L'air Liquide,societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude

Commissariat a L'energie Atomique Et Aux Energies Alternatives

Air Liquide Welding France

Isabelle Debecker

Philippe Lefebvre

Francis Briand

Thomas Jouanneau

Eric Verna

Hakim Maazaoui

Agnès Pailloux

Julien Cousin

Jean-Marc Weulersse

Gaia Ballerini

The invention relates to a laser nozzle that can be used in laser cutting, notably with a fibre or disc laser, comprising a nozzle body comprising an axial housing passing axially through said nozzle body and comprising a first outlet orifice situated at the front face of the nozzle body, and a movable element comprising a skirt-forming front part arranged in the axial housing of the nozzle body, said movable element being capable of translational movement in the axial housing of the nozzle body and comprising an axial passage with a second outlet orifice opening onto the skirt-forming front part.

Laser nozzle with mobile element

Laser nozzle usable for laser cutting, especially with a fiber or disk laser, comprising: a nozzle body comprising an axial housing passing axially through the nozzle body and comprising a first output orifice located in the front side of the nozzle body; a movable element able to move in translation in the axial housing in the direction of the first output orifice under the effect of a gas pressure acting on the movable element; and an elastic element arranged in the axial housing, between the nozzle body and the movable element, the elastic element exercising an elastic return force on the movable element tending to oppose the translation movement in the axial housing in the direction of the first output orifice.

Laser nozzle comprising an element movable in a gas layer

Micro-leaks are detected by means of a sniffer device including, in an original manner, a flat suction capsule () with divergent channels where the flow is regular, a resonant optical cavity () as a means of detection and a pump () with a low flow rate, which is insufficient to create a vacuum which would be required with other means of detection. Much fainter micro-leaks can be detected.

Device for detecting micro-leaks

Growing community of inventors

Paris, France

Isabelle Debecker