Metal deforming – By deflecting successively-presented portions of work during... – By use of work-contacting wiper and moving – work-holding form
Patent
1987-03-30
1988-07-05
Combs, E. Michael
Metal deforming
By deflecting successively-presented portions of work during...
By use of work-contacting wiper and moving, work-holding form
B21D 704
Patent
active
047546328
ABSTRACT:
The invention relates to an apparatus for bending structural metal rails, preferably rails for multi-glazed windows, and gives instructions for a bending unit (20) having two wringing heads (6) which can be displaced relative to the width of the rail, for in an open position to allow the infeed of rails (5) having various width, and in an attracted position to clamp a portion of the rail (5) for the bending thereof by turning the wringing heads (6). Since each wringing head (6) is provided with a protrusion (6a) having an edge (6b) serving to position the rail (5) upon the closing of the wringing head (6) and to support the rail (5) during the bending operation, there is also defined a space (6c) between the protrusions (6a), said space (6c) defining an infeed path for further supply of rail (5) immediately after a bending operation and after the opening of the wringing heads (6), so that the infeed of a further length of rail takes place synchronously with the return movement of the wringing heads (6) to the starting position for another bending operation.
REFERENCES:
patent: 1267845 (1918-05-01), Burt
patent: 1520635 (1924-12-01), Evans
patent: 2346468 (1944-04-01), Brickman et al.
patent: 4261145 (1981-04-01), Brocking
patent: 4350033 (1982-09-01), Ishihara
Combs E. Michael
Norvell, Jr. William C.
Rjukan Metall A/S
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