L'air Liquide, Soci&#xe9;t&#xe9; Anonyme Pour L'etude Et L'exploitation Des Proc&#xe9;d&#xe9;s Georges Claude

Air Liquide Welding France

Thomas Jouanneau

Philippe Lefebvre

Francis Briand

Eric Verna

Isabelle Debecker

Hakim Maazaoui

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

A laser nozzle comprising a nozzle body () comprising a first axial housing () comprising a first outlet orifice () located in a front face () of the nozzle body (); a movable element () arranged in the first axial housing () of the nozzle body (), comprising a front portion () forming a skirt and an axial passage () having a second outlet orifice () emerging from said front portion () forming a skirt; and an elastic element () arranged in the first axial housing (), between the nozzle body () and the movable element (). According to the invention, the movable element () is able to move translationally in the first axial housing () in the direction of the first outlet orifice () under the effect of a gaseous pressure exerted on the movable element (), and the elastic element () exerts an elastic return force on the movable element () tending to oppose the translational movement in the first axial housing () in the direction of the first outlet orifice (). Furthermore, the nozzle furthermore comprises an external cover () forming a sleeve around all or some of the nozzle body (). Focusing head and associated laser cutting apparatus. Laser beam cutting process employing a nozzle according to the invention, a laser focusing head according to the invention or an apparatus according to the invention.

Laser nozzle having an internal mobile element and an external cover

The invention relates to a nozzle for laser cutting comprising a nozzle body () comprising an axial housing () and a first outlet orifice () situated in the region of the front face () of the nozzle body (), a mobile element () arranged in the axial housing () of the nozzle body (), comprising a skirt-forming front part () and comprising a second outlet orifice (), said mobile element () being able to be moved in a translational movement inside the axial housing () toward the first outlet orifice () under the effect of a gas pressure applied to the mobile element () until such time as the skirt-forming front part () of the mobile element () projects out from the axial housing () through the first outlet orifice (), and an elastic element () arranged in the axial housing (), between the nozzle body () and the mobile element (), applying an elastic return force to the mobile element (). According to the invention, the front part () comprises an end portion () the outside diameter of which decreases progressively toward the second outlet orifice (). Focusing head and associated laser cutting installation. Laser-beam cutting method employing a nozzle according to the invention, a laser focusing head according to the invention or an installation according to the invention.

Laser nozzle with mobile element of improved external profile

The invention relates to a nozzle for laser cutting, comprising a nozzle body () comprising a first axial housing (), a movable element () formed from an electrically insulating material and comprising a second axial housing (), said movable element () being arranged in the first axial housing (), and an elastic element () arranged in the first axial housing () between the nozzle body () and the movable element (). According to the invention, the nozzle furthermore comprises an insert () comprising an axial passage () and a front portion () forming a skirt that protrudes out of the second axial housing (), said insert () being arranged in the second axial housing () of the movable element () and formed from an electrically conductive material. Associated laser head and apparatus. Laser cutting process employing such a nozzle.

Laser nozzle having an external mobile element made of electrically insulating material and an insert made of electrically conductive material

The invention relates to a nozzle for laser cutting, comprising a nozzle body () comprising a first axial passage (); an external cover () comprising an axial housing (), the nozzle body () being arranged at least partially in said axial housing (); a movable element () comprising a second axial passage () and a front portion () forming a skirt, said movable element () being arranged between the external cover () and the nozzle body () and being translationally movable in the axial housing () of the external cover (); and an elastic element () arranged in the axial housing (), between the external cover () and the nozzle body (). According to the invention, the movable element () is able and designed to move translationally in the axial housing () in the direction of the first outlet orifice () under the effect of a gaseous pressure of said assistance gas (), said pressure being applied in said axial housing () and exerted on said movable element (), said elastic element () exerting an elastic return force on the movable element () tending to oppose the translational movement of the movable element (). Associated laser head and apparatus. Laser cutting process employing such a nozzle.

Growing community of inventors

Grenoble, France

Thomas Jouanneau