Method of producing a sheet metal pulley for a V belt
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jan 11, 2000
Grant Date -
N/A
app pub date -
Mar 17, 1998
filing date -
Aug 5, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to a method of producing a sheet metal pulley for a V belt without cutting which may impair the environment of a factory. A sheet metal pulley for a V belt which is obtained by the production method of the present invention has plural valley portions around which V belts are to be wound. In the production method, an annular first valley portion which is opened in a V-like shape is formed by slitting a root portion of a cylindrical portion of a sheet metal cylindrical member and an outer periphery of a base plate portion continuous to the root portion. A cylindrical portion continuous to the first valley portion is elongated in the axial direction while being thinned, thereby forming an intermediate shaped member, and, while applying a pressing force in the axial direction to the cylindrical portion of the intermediate shaped member, an intermediate portion in the axial direction of the cylindrical portion is pressed in a radial direction to be inwardly bent, thereby shaping the pressed place into an annular second valley portion. When the cylindrical portion of the sheet metal cylindrical member is sufficiently long, the elongation of the cylindrical portion is not required.
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