Roll forming method and device
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United States of America Patent
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Jan 27, 1998
Grant Date -
N/A
app pub date -
Jul 16, 1996
filing date -
Jul 20, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A roll forming method is used for forming an annular product with a radially outwardly extending flange portion at an end and includes steps of holding a center portion of a work for forming the annular product by a holding device, rotating the work, contacting a circumferential end portion of the rotating work with a forming roller to be pressed to form the flange portion while retaining a circumferential outer end of the work. The present invention is advantageous in that the resultant product has a good quality without deficiency, such as underfill of the material and has an improved toughness unlike a cast product, a product made by welding and the like of the same structure.
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