Method of producing a transverse force bolt and transverse...

B - Operations – Transporting – 21 – K

Patent

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B21K 1/44 (2006.01) E01C 11/14 (2006.01)

Patent

CA 2200905

In the course of the production of a transverse force bolt (10) in accordance with the invention, the sheath (2) made of a rod-shaped pipe of stainless steel is drawn on a rod-shaped core (1) of conventional structural steel. In the process the exterior dimension can be simultaneously calibrated (20). The rod-shaped semi-finished product (3) is subsequently cut into rods (4) by means of a saw (30). By means of a hydraulic press the core is pushed out of the rod (4) by a length (a), and the ejected portion (5) is cut off. Subsequently the core (1) is pushed back by half the length (a/2) of the cut-off portion (5), and finally the open ends (6) of the sheath (2) are closed. This results in a transverse force bolt (10) of particularly great strength, which is very precise and extremely low cost.

La présente invention a pour objet un boulon de force transversale (10) dont la fabrication comporte les étapes suivantes : une gaine (2) composée d'un tube en acier inoxydable est étirée sur un noyau (1) en forme de barre en acier de construction ordinaire. Au cours du procédé, les dimensions extérieures peuvent être calibrées simultanément (20). Le produit semi-fini en forme de barre (3) est ensuite coupé en barres (4) au moyen d'une scie (30). € l'aide d'une presse hydraulique, le noyau est chassé à l'extérieur de la barre (4) sur une certaine longueur (a), et la partie éjectée (5) est coupée. Ensuite, le noyau (1) est repoussé vers l'intérieur de la gaine sur une distance (a/2) correspondant à la moitié de la partie éjectée (5); finalement, les extrémités ouvertes (6) de la gaine (2) sont fermées. Le boulon de force transversale (10) résultant de ce procédé de fabrication est produit à un coût extrêmement faible et est caractérisé par une force particulièrement grande et une grande précision.

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