Metal deforming – By deflecting successively-presented portions of work during... – With cutting of work or product
Reexamination Certificate
2007-12-25
2007-12-25
Crane, Daniel C (Department: 3725)
Metal deforming
By deflecting successively-presented portions of work during...
With cutting of work or product
C072S167000, C072S177000, C083S694000
Reexamination Certificate
active
10550649
ABSTRACT:
A forming apparatus (50) includes a roll former (51) operative to roll form a metal strip (100) to form a profiled metal section (10) of generally C section profile including a pan (12) and a pair of upstanding edge margins (14and16). The section profile incorporates a longitudinal precamber which is introduced by the forming apparatus by incorporating a prestretching apparatus (52) upstream from the roll former (51), and a bending apparatus (53) located downstream of the roll former (51). The prestretching apparatus differentially stretches the metal strip (100) in its longitudinal direction so as to form portions (101, 102), which are more elongated than a laterally adjacent portion (103) of the strip (100). The differential stretching compensates for longitudinal shortening of the metal strip in forming the profiled section in the roll former (51). The bending apparatus (53) uses a (3) point bending process and includes a reaction stage (60), a fulcrum stage (61), and an action stage (62). The action stage (62) which induces loading onto the profiled section (10) so as to bend the section about the fulcrum stage (61) is incorporated with the shearing assembly. A method of forming a metal section from sheet metal strip is also disclosed. In a further aspect a shearing assembly is disclosed which is height adjustable and which also includes a cutting element (77) and shearing block (78) which are pivotally mounted to an assembly frame (74).
REFERENCES:
patent: 3111054 (1963-11-01), Tishken
patent: 3546918 (1970-12-01), Trainer
patent: 4233833 (1980-11-01), Balinski
patent: 4583675 (1986-04-01), Ochiai et al.
patent: 4627254 (1986-12-01), Kitsukawa et al.
patent: 5056348 (1991-10-01), Albrecht et al.
patent: 5253501 (1993-10-01), Spath
patent: 6286352 (2001-09-01), Hackstock
patent: 6820451 (2004-11-01), Renzzulla et al.
patent: 10145/02 (2002-07-01), None
patent: 1297182 (1972-11-01), None
patent: 2045129 (1980-10-01), None
patent: 2039638 (1995-07-01), None
patent: WO 02/22327 (2002-03-01), None
patent: WO 02/38880 (2002-05-01), None
patent: WO 02/38885 (2002-05-01), None
Bluescope Steel Limited
Crane Daniel C
Hahn Loeser & Parks LLP
Minns Michael H.
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