Device and method for contacting a welding rod and contact shell

A contact shell for contacting a welding wire in a welding torch, the contact shell comprising at one end thereof a contact area for the welding wire and an opposite holding section for fastening in the welding torch, wherein an elevation is defined at a front face of the holding section, wherein an axial pressure is adapted to be exerted via the elevation for achieving a movement about a rotational axis being parallel to the elevation and the conversion of the pressure into a radial contact force in the contact area, wherein furthermore two opposite contact points are formed in the holding section at the ends of the rotational axis for contacting with a holding device, wherein a recess from the contact area to the holding section is arranged for receiving a further contact shell, which is restricted laterally and at the front side by walls and extends to a level for the guidance of the welding wire, and wherein an opening for the welding wire is arranged in the front-side wall.

A contact shell for contacting a welding wire in a welding torch, the contact shell comprising at one end thereof a contact area for the welding wire and an opposite holding section for fastening in the welding torch, wherein an elevation is defined at a front face of the holding section, wherein an axial pressure is adapted to be exerted via the elevation for achieving a movement about a rotational axis being parallel to the elevation and the conversion of the pressure into a radial contact force in the contact area, wherein furthermore two opposite contact points are formed in the holding section at the ends of the rotational axis for contacting with a holding device, wherein the width of the contact shell substantially corresponds to the width of the contact area, and wherein the contact shell is designed for being received in a recess of a further contact shell for defining a multi-part contact pipe.

A contact shell for contacting a welding wire in a welding torch, the contact shell comprising at one end thereof a contact area for the welding wire and an opposite holding section for fastening in the welding torch, wherein an elevation is defined at a front face of the holding section, wherein an axial pressure is adapted to be exerted via the elevation for achieving a movement about a rotational axis being parallel to the elevation and the conversion of the pressure into a radial contact force in the contact area, wherein furthermore two opposite contact points are formed in the holding section at the ends of the rotational axis for contacting with a holding device, wherein at least two opposite projections are arranged at the front face for defining the rotational axis, wherein the elevation is positioned between the projections, and wherein the elevation and the rotational axis are positioned approximately on one level.