Roller hemming method and hemmed member

Details Roller hemming method and hemmed member Roller hemming method and hemmed member

2011-05-03

2011-05-03

Sullivan, Debra M (Department: 3725)

Metal deforming

By use of roller or roller-like tool-element

Comprising tool movable relative to stationary work-portion...

C072S220000, C029S243580

Reexamination Certificate

active

07934408

ABSTRACT:
In a roller hemming method for folding a flange erected from a workpiece by pressing a working roller against the flange and moving the working roller relative to the flange, the flange is folded by: a first temporary bending step of bending a tip-side portion of the flange into a state that the tip-side portion is inclined; a second temporary bending step of bending a remaining, base-side portion of the flange into a state that the base-side portion is inclined; and a full bending step of bending the thus-bent flange into a final shape so that the flange is into contact with a flange-proximate portion.

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