METHOD FOR PRODUCING A SCREW FOUNDATION FOR SECURING ELEMENTS IN THE GROUND

The invention relates to a method for producing a screw foundation (12) for securing elements in the ground, in which a cylindrical tube (1) is provided as an initial form and a conical front portion (10) tapering to an insertion tip (9) is then moulded on to the cylindrical tube (1) by means of a n...

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Bibliographische Detailangaben
Hauptverfasser:	RUDERT, BERND, HECKER, KARL-HEINZ, POTTGUTER, RALF
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BUILDING BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES EMBANKMENTS EXCAVATIONS FENCING FIXED CONSTRUCTIONS FOUNDATIONS HYDRAULIC ENGINEERING MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS,WHEELS, RINGS, BARRELS, BALLS MASTS MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PUNCHING METAL SOIL SHIFTING SWIMMING OR SPLASH BATHS OR POOLS TENTS OR CANOPIES, IN GENERAL TRANSPORTING UNDERGROUND OR UNDERWATER STRUCTURES WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	The invention relates to a method for producing a screw foundation (12) for securing elements in the ground, in which a cylindrical tube (1) is provided as an initial form and a conical front portion (10) tapering to an insertion tip (9) is then moulded on to the cylindrical tube (1) by means of a non-cutting process, the front portion (10) being provided at least in some regions with a thread-like contour (11) for screwing into the ground. According to the invention, an inner contour (2) for a screwing tool is formed integrally in a rear end (1a) of the tube (1) by flow forming, and the front portion (10) and the thread-like contour (11) are formed exclusively by flow forming. L'invention concerne un procédé de production d'une fondation à vis (12) pour la fixation d'éléments dans le sol, dans lequel un tube cylindrique (1) est présenté comme une forme initiale et une partie avant conique (10) se rétrécissant vers une pointe d'insertion (9) est ensuite moulée sur le tube cylindrique (1) au moyen d'un procédé de non-coupe, la partie avant (10) étant pourvue, au moins dans certaines zones, d'un contour filiforme (11) destiné à être vissé dans le sol. Selon l'invention, un contour intérieur (2) pour un outil de vissage est formé d'un seul tenant dans une extrémité arrière (1a) du tube (1) par formation d'écoulement, et la partie avant (10) et le contour filiforme (11) sont formés exclusivement par formation d'écoulement.