Bending machine and method having positionable drawing rolls and

Details Bending machine and method having positionable drawing rolls and Bending machine and method having positionable drawing rolls and

1998-04-24

1999-10-19

Crane, Daniel C.

Metal deforming

By use of non-deforming work-gripping clamp and relatively...

With cutting

72307, B21D 7024

Patent

active

059669799

ABSTRACT:
Perfected bending system for bending machines including a working plane (19) cooperating with at least a drawing device (12) including one or more pairs of rolls (15), the rolls (15) having at least a working position ("I") wherein they are closed on the round piece (11) in order to feed it forward, the drawing device (12) cooperating with at least one bending assembly (13b) arranged downstream thereof and with at least one shearing assembly (14), the system providing that, at the end of the feeding and positioning step of the round piece (11) in correspondence with the relative bending assembly and before the bend is made, the rolls (15) of the drawing device (12) are temporally arranged in an open position ("II") where they do not interfere laterally and are not in contact with the round piece (11) so as to allow the already bent portion located beyond the bending assembly to fall onto the working plane (19), returning subsequently to the closed working position ("I") before the bending is carried out.

REFERENCES:
patent: 3263471 (1966-08-01), Martin
patent: 3584660 (1971-06-01), Pain
patent: 4590779 (1986-05-01), Stange
patent: 5195348 (1993-03-01), Del Fabro
patent: 5375447 (1994-12-01), Del Fabro
patent: 5511402 (1996-04-01), Kauffman

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