B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
B21D 5/16 (2006.01) B21D 39/02 (2006.01) F16B 5/00 (2006.01)
Patent
CA 2327985
A hemming steel constructed to fold or hem a flange of an outer sheet metal panel onto an inner sheet metal panel has a forming face with a first, generally flat section and a second section inclined to the first section to provide a finished, hemmed flange having an outer portion closed or folded flat onto the inner sheet metal panel and an inner portion adjacent to the fold line which is inclined to the outer portion providing a reduced radius of the fold line bend. The second section of the hemming steel is preferably generally planar such that the inner portion of the hemmed flange is generally flat and provides an outer bend diameter along the fold line of the outer sheet metal panel which is less than three times the thickness of the sheet metal panel and may be approximately equal to or less than the thickness of the outer panel. The reduced bend diameter is believed to provide a smooth and fair fold line which has a more consistent appearance when viewed from different angles to improve the appearance of the panels of the vehicle body in assembly. Further, with the outer portion of the hemmed flange folded flat against the inner sheet metal panel, no sealing operation is required to prevent foreign material from collecting between the flange and inner panel. The angle at which the second section of the forming face is inclined relative to the first section can be changed to allow the location of the peripheral edge of the inner panel to be varied relative to the fold line.
Marks & Clerk
Unova Ip Corp.
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