Method of spinning a pulley from a tubular blank

Details Method of spinning a pulley from a tubular blank Method of spinning a pulley from a tubular blank

B - Operations, Transporting

21

D

B21D 53/26 (2006.01) B21D 22/16 (2006.01)

Patent

CA 2421898

The invention comprises a method of spinning a pulley using a tubular blank. A tubular blank (B) is placed in a spinning machine mandrel (10). The hub (14) is formed by spinning down, or inward, one end of the tubular blank, while leaving the other end as a cup for either spinning a pulley or sprocket profile. This process results in natural thickening of metal at the hub by maintaining a constant volume of metal while reducing the diameter of the tube during the spinning process.

La présente invention concerne un procédé de mise en giration d'une poulie à l'aide d'une ébauche tubulaire. On place une ébauche tubulaire dans le mandrin d'une fileuse. On forme le noyau par la giration vers le bas ou vers l'extérieur d'une extrémité de cette ébauche tubulaire, tout en laissant l'autre extrémité en forme de cuvette de façon à mettre en giration soit une poulie, soit un profil de pignon. Ce processus entraîne un épaississement naturel du métal au niveau du noyau permettant de maintenir un volume de métal constant tout en réduisant le diamètre du tube pendant le processus de giration.

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