Metal deforming – By deflecting successively-presented portions of work during... – By use of work-contacting wiper and moving – work-holding form
Patent
1991-10-16
1994-08-02
Crane, Daniel C.
Metal deforming
By deflecting successively-presented portions of work during...
By use of work-contacting wiper and moving, work-holding form
72151, B21D 704
Patent
active
053334817
ABSTRACT:
Described is a spatial uncoiling and stretch-bending process in combination with a mandrel bending station and the corresponding apparatus, in which the section being bent is first clamped at either end and prestressed and the section is then bent, with at least one section roller being pressed against the section in the forming zone and three-dimensionally repositioned. To also permit the bending of closed or partially open sections, the invention provides that the mandrel bending station, with the mandrel or mandrels around which the section is bent, move in agreement with the motion of the section rollers, which are pressed from the outside onto the mandrel bending station.
REFERENCES:
patent: 1587931 (1926-06-01), Wolders
patent: 1982164 (1934-11-01), Hoener
patent: 3121538 (1964-02-01), Klingensmith
patent: 3339391 (1967-09-01), Kowalski
patent: 4009601 (1977-03-01), Shimizu
patent: 4236398 (1980-12-01), Schwarze
patent: 4238945 (1980-12-01), Busse
patent: 4941338 (1990-07-01), Spath
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