Welding burner comprises a feed unit with one end facing a contact pipe having a conical tip having a slope gradient corresponding to the slope gradient of the conical extension in the bore of the contact pipe

摘要

Welding burner comprises a base body (2) containing a feed unit (19) for a welding wire (9) and connected with a connecting piece for receiving a contact pipe. The end (22) of the feed unit facing the contact pipe has a conical tip (23) having a slope gradient corresponding to the slope gradient of the conical extension (24) in the bore (14) of the contact pipe. An Independent claim is also included for a process for fixing a contact pipe in a welding burner. Preferred Features: The ratio between the bore diameter of the contact pipe and the outer diameter of the welding wire is 1.03: 1.10. The welding wire is made from aluminum. The feed unit is formed by a spiral spring (20) made from bronze or brass.