Method of manufacturing an annular member made from a metal sheet having a peripheral wall
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United States of America Patent
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Aug 9, 2005
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N/A
app pub date -
Sep 21, 1998
filing date -
Oct 6, 1997
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Abstract
The present invention relates to a disc-shaped material made from metal sheet, provided for the manufacture of a pulley or the like. According to the present invention, even if the metal sheet is thin and light weight, a peripheral wall of sufficient strength can be formed, by the following steps: rotating the material held between a pair of dies and pressing an outer periphery of the material by means of a forming roller, in a radially inward direction, thereby thickening axially the outer periphery of the material to be extended to both sides of a non-processed portion, thus forming the peripheral wall.
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