Method for roll forming, capable of preventing wrinkles and...

Details Method for roll forming, capable of preventing wrinkles and... Method for roll forming, capable of preventing wrinkles and...

2006-05-23

2006-05-23

Banks, Derris H. (Department: 3725)

Metal deforming

By use of 'flying tool' engaging moving work

Including orbitally-moving tool-face

C072S076000, C072S176000, C072S182000, C072S184000, C072S190000, C072S193000, C072S194000, C072S196000, C072S197000, C072S198000, C072S192000, C072S465100, C072S466800

Reexamination Certificate

active

07047782

ABSTRACT:
A die roll3comprises a core part3awhich is formed of an elastic material and faces a punch part2aof a punch roll2.The core part3apresses a bottom portion4bof a drawn portion4aof a metal material4and is separate from a surrounding die part3band is provided with a space3cat the whole outer periphery of the core part3a.In accordance with the above configuration, swelling is suppressed at the bottom portion4bof the drawn portion4aand production of large wrinkles, which is a reason for folds, can be prevented by increase of pressing areas for preventing wrinkles at both sides of the drawn portion.

REFERENCES:
patent: 3040799 (1962-06-01), Hanson
patent: 3150707 (1964-09-01), Howell
patent: 3828632 (1974-08-01), Grano
patent: 6339947 (2002-01-01), Bodnar
patent: 62214835 (1987-09-01), None

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