Metal deforming – By relatively movable offset tool-faces – Embodying three or more coacting relatively movable tools
Patent
1981-05-15
1983-09-13
Crosby, Gene
Metal deforming
By relatively movable offset tool-faces
Embodying three or more coacting relatively movable tools
72411, B21D 703
Patent
active
044034954
ABSTRACT:
An apparatus for bending an elongate member with a pair of spaced parallel planar flanges which normally extend from the planar web to form a channel section. The apparatus includes a platen shaped for close fitting engagement with the exterior web and flange faces of the elongate member in a region where the elongate member is bent. The platen also includes a counter-pressure member, one surface of which engages the exterior face of the web of the elongate member in the bending region. The counter-pressure member is capable of being selectively advanced or retracted within the platen. A movable head member shaped for close fitting engagement with the interior web and flange faces of the elongate member in the bending region has projections which apply a force in the bending region acting in the planes of the flanges on longitudinally spaced portions of the elongate member for relative displacement of the portions. During this displacement, the projection is maintained in a close fitting engagement with the interior web and flange faces of the elongate member while the platen and the counter-pressure member are maintained in a closely fitting engagement with the exterior web and flange faces of the elongate member so that the flanges in the bending region of the elongate member are maintained in a planar position.
REFERENCES:
patent: 251003 (1881-12-01), Vanstone
patent: 2947344 (1960-08-01), Springer
patent: 3159198 (1964-12-01), Sutch
patent: 3501941 (1970-03-01), Long
patent: 3898832 (1975-08-01), Eckold
Crosby Gene
Rockwell International Corporation
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