Method for producing rolled structural shapes

Details Method for producing rolled structural shapes Method for producing rolled structural shapes

1995-12-04

1997-06-24

Crane, Daniel C.

Metal deforming

By deflecting successively-presented portions of work during...

With cutting of work or product

72181, 225 2, 225 3, B21D 514

Patent

active

056408692

ABSTRACT:
A method for producing a roll forming allows the hemming step and the roll-forming step to be contiguously performed in a single production line. The first ripping step (E) tears off a side edge strip along the first groove formed by the first grooving step (B) to form a first edge portion having a gradually changed sectional shape. At least the first grooving step (B) and the first ripping step (E) are performed contiguously with the roll-forming step (A) by utilizing the sheet or product conveyance force provided in the roll-forming step (A).

REFERENCES:
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patent: 2053375 (1936-09-01), Nicholas
patent: 3768712 (1973-10-01), Imbert
patent: 3841134 (1974-10-01), Falkner
patent: 4109500 (1978-08-01), Franek
patent: 4282996 (1981-08-01), Maeda
patent: 4959986 (1990-10-01), Kranis
patent: 5088309 (1992-02-01), Knudson
patent: 5090227 (1992-02-01), Takeda et al.
patent: 5400631 (1995-03-01), Benedetti

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