Metal deforming – By deflecting successively-presented portions of work during... – By use of work-contacting wiper and moving – work-holding form
Patent
1989-12-05
1991-01-01
Combs, E. Michael
Metal deforming
By deflecting successively-presented portions of work during...
By use of work-contacting wiper and moving, work-holding form
72149, B21D 704
Patent
active
049810308
ABSTRACT:
A portable pipe bending machine to bend pipes up to an angle of 180.degree., in the range of outside diameters from about 4 mm to 42 mm, and of thicknesses from about 0.5 mm to 2.5 mm. A main carrying structure (11) of a light alloy in the form of a parallelpiped box has a hollow base (12) and two superposed structural component parts (13, 14) wherein a mechanical transmission and drive system and control system are arranged. A cover (14) of the structure (11) has a protruding part (15) providing a support plane (15') as a supporting and sliding base of a rack (16) between parallel side guides for the positioning of a countermatrix die (31). From the cover emerges a main shaft (50) on which a matrix die (30) is rotatable about an axis perpendicular to the rack, the matrix die (30) having for at least about 180.degree. a pulley shape (30a) with a semicircular groove and a perimetral profile having a tangential extension (30b ) along a feeding direction of a pipe to be bent. The matrix die (30) is assembled for free turning on a cylindrical end (52') of the main shaft (50). The countermatrix die (31) comprises a substantially parallelpipedal body, a side of which has a protruding part (31') provided with a through hole with an axis parallel to that side, for assembling the body on the pin (20) of a slider (19). An opposite side of this parallelepipedal body has a shape for receiving the pipe to be bent.
REFERENCES:
patent: 3921424 (1975-11-01), Pearson
patent: 4201073 (1980-05-01), Eaton
patent: 4355525 (1982-10-01), Carson
patent: 4532787 (1985-08-01), Caporusso et al.
patent: 4546632 (1985-10-01), Van Den Kieboom
patent: 4760727 (1988-08-01), Van Landingham
Caporusso Alessandro
Caporusso Mario
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