Bending machine to wind a strip or the like into a spiral

Details Bending machine to wind a strip or the like into a spiral Bending machine to wind a strip or the like into a spiral

1999-10-01

2000-10-03

Butler, Rodney A.

Metal deforming

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

To form spiral coil

B21C 4700

Patent

active

061256781

ABSTRACT:
A bending machine to wind a strip or the like into a spiral comprising a mandrel (2), a bending tool (3), including a grip portion (32) of an end (50) of a strip (5) and a supporting, guiding and counteracting element (4) on a table (1) of the bending machine is disclosed. The bending tool (3) further comprises a plurality of modular elements (60, 61, 62, 63, 64 . . . ) consecutively so jointed to be relatively movable according to predetermined plane rotations, connected to the grip portion (32), so that, in the rotation of the mandrel (2), the plurality of modular elements roll up on the grip portion (32), with the strip (5) being interposed, so that the path of radially internal and external surfaces of said modular elements are spiral and continuous. The supporting element (4) includes a friction roller-holder lever (40), which can be operated by a vise.

REFERENCES:
patent: 2929135 (1960-03-01), Cromberg et al.
patent: 3662575 (1972-05-01), Zmuda
patent: 5632174 (1997-05-01), Hunter

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