Method of forming a circular sheet-metal blank

B - Operations – Transporting – 21 – D

Patent

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Details

B21D 22/14 (2006.01) B21H 1/02 (2006.01) B21K 1/28 (2006.01)

Patent

CA 2614931

A method of forming a circular sheet-metal blank (1), which has a central hole (2) and rests on a tool (4) rotating about an axis (3) and has a thickness al and a diameter dl which is less than the diameter of the tool (4) is distinguished by the fact that one or more pressure rollers are preferably plunged axially into the material of the circular sheet-metal blank and are moved radially outwards, so that the area of the sheet-metal blank (1) is enlarged radially in all directions, so that a preferably rotationally symmetrical part, in particular a further circular sheet-metal blank having a larger diameter d2 and a thickness a2 reduced at least in sections or throughout, is formed from the circular sheet-metal blank having the initial diameter dl and the thickness al.

L'invention concerne un procédé de mise en forme d'une tôle ronde (1) dotée d'un trou central (2). Cette tôle ronde qui repose sur un outil (4) tournant autour d'un axe (3) et a une épaisseur al et un diamètre dl qui est inférieur au diamètre de l'outil (4). L'invention est caractérisée en ce qu'au moins un rouleau de repoussage pénètre dans le matériau de la tôle ronde, de préférence, axialement et se déplace radialement vers l'extérieur, de telle façon que la surface de la tôle ronde (1) s'agrandisse radialement dans toutes les directions de manière à obtenir à partir de la tôle ronde d'un diamètre initial dl et d'une épaisseur al un élément, de préférence, à symétrie de rotation, notamment une autre tôle ronde ayant diamètre d2 plus grand et une épaisseur a2 réduite au moins par sections ou en continu.

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