Patent ID: 6176415
Filing Date: 2001-01-23
Classification: B23K

Abstract:
A method of connecting components, including pipes, rods or semi-finished products by friction welding, comprising the steps of using a friction element which is arranged in an abutting position between those ends of the components which are to be connected and is rotated about an axis which is common to the components and to the friction element in order to produce a welding temperature by friction heat with compression forces which at the same time act on contact surfaces between the friction element and the component ends; subjecting the connecting component, for adjoining process, after reaching the welding temperature and stopping the rotary movement of the friction element applying higher oppositely directed pressure forces to the components; removing a burr produced during friction and joining process, after the rotary movement has been stopped to higher compression forces in opposite directions; after reaching the welding temperature and forming a virtually steady-state temperature area at the ends of the components, continuing the friction process until a material of the friction element is completely removed on surfaces which are involved with the friction process and the ends of the components to be joined come into contact with one another; thereafter subjecting the components to an increased contact pressure and welding to one another by upsetting; and reshaping and removing the burr during the friction and upsetting, at the same time.