초록 ▼

The invention relates to a contact tube (29) for a welding torch (10), having a longitudinal axis (31) along which a through-opening (30) for guiding a welding wire (13) from an inlet region (37) to an outlet region (35) and from an outlet opening (39) towards a workpiece (16) is provided, wherein a

The invention relates to a contact tube (29) for a welding torch (10), having a longitudinal axis (31) along which a through-opening (30) for guiding a welding wire (13) from an inlet region (37) to an outlet region (35) and from an outlet opening (39) towards a workpiece (16) is provided, wherein at least one slot (34) is provided in the outlet region (35) for making contact with the welding wire (13). A contact tube (29) with improved contacting of the welding wire (13) is obtained by providing at least one further slot (36) in the inlet region (37) of the contact tube (29), wherein the slot (36) in the inlet region (37) is arranged in line with the slot (34) in the outlet region (35), and a web (38), which serves as a pivot point, is formed between the slot (34) in the outlet region (35) and the at least one slot (36) in the inlet region (37).

대표청구항 ▼

1. A contact tube for a welding torch, having a longitudinal axis, along which a continuous opening is provided for guiding a welding wire from an inlet area to an outlet area and from an outlet opening in the direction of a workpiece, at least one outlet slot extending in a longitudinal direction a

1. A contact tube for a welding torch, having a longitudinal axis, along which a continuous opening is provided for guiding a welding wire from an inlet area to an outlet area and from an outlet opening in the direction of a workpiece, at least one outlet slot extending in a longitudinal direction and being provided for contacting the welding wire in the outlet area, wherein at least one inlet slot is provided in the inlet area of the contact tube, which is implemented in one piece, the at least one inlet slot in the inlet area and the at least one outlet slot in the outlet area being situated aligned, and a web, which is used as a pivot point, being formed between the at least one outlet slot in the outlet area and the at least one inlet slot in the inlet area, around which pivot point a movement of the parts of the contact tube situated on both sides of the at least one outlet slot and the at least one inlet slot is made possible so that two outlet parts positioned in the outlet area and separated by the at least one outlet slot move toward each other while two inlet parts positioned in the inlet area and separated by the at least one inlet slot move away from each other, when the contact tube is mounted to a torch body. 2. The contact tube according to claim 1, wherein the at least one outlet slot in the outlet area is situated running along the longitudinal axis up to before the outlet opening of the contact tube and subsequently diagonally to the longitudinal axis, so that two jaws which differ in their shape are formed on both sides of the at least one outlet slot. 3. The contact tube according to claim 2, wherein one jaw is implemented as essentially L-shaped and encloses the outlet opening for the welding wire. 4. The contact tube according to claim 1, wherein a contact area is provided for contacting the welding wire in the outlet area, which contact area is adaptable to the diameter of the welding wire, and the opening is implemented up to the contact area in such a manner that the welding wire can be guided essentially free running from the inlet area up to the contact area in the outlet area. 5. The contact tube according to claim 1, wherein a ring-shaped expansion having an external diameter greater than the remaining external diameter of the contact tube is provided in the inlet area, and a stop surface is implemented on the side of the expansion oriented toward the outlet opening. 6. The contact tube according to claim 5, wherein the inner surface of the ring-shaped expansion is implemented as tapering conically toward the opening to receive a corresponding conical adapter part for fastening on the welding torch. 7. The contact tube according to claim 6, wherein the inner surface of the ring-shaped expansion is implemented as curved. 8. The contact tube according to claim 6, wherein a union nut is provided for fastening the adapter part, so that the inlet area is spread apart by the conical adapter part and as a result of the jaws in the outlet area are moved toward one another. 9. The contact tube according to claim 8, wherein the union nut is situated as a protective envelope over the outlet area. 10. The contact tube according to claim 1, wherein the outlet area is implemented as conically tapering toward the outlet opening. 11. The contact tube according to claim 6, wherein the adapter part has a hole for the welding wire, a cone on one side for use on the conical inner surface, and an external thread on the side diametrically opposite to the cone for connection to the welding torch. 12. The contact tube according to claim 11, wherein an external thread for connection to a corresponding internal thread of the union nut is situated on the side of the cone of the adapter part.