Metal deforming – By twisting axially moving work
Patent
1987-04-09
1988-08-30
Jones, David
Metal deforming
By twisting axially moving work
72371, 72299, 72181, 72 65, B21B 1502
Patent
active
047667516
ABSTRACT:
An apparatus for continuously producing a tube having helical grooves in its surface comprises a first drum, a flier having an axis intersecting the axis of the first drum at right angles therewith and rotatable around the first drum, and a second drum. One of the two drums serves as a pay-off drum for paying off a tube having straight grooves in its inner surface, while the other drum serves as a take-up drum for winding thereon the helically grooved tube obtained. At one side of the pay-off drum where the paid-off straight-grooved tube is to be transferred to the flier, a device is provided for preventing the torsion of the tube produced by the rotation of the flier from being transmitted toward the pay-off drum. A correcting device is provided between the flier and the take-up drum for remedying deformation of the helically grooved tube. With the rotation of the flier, the straight-grooved tube is twisted, whereby the straight grooves are deformed to helical grooves to afford a helically grooved tube.
REFERENCES:
patent: 1740612 (1929-12-01), Lowe
patent: 1998582 (1935-04-01), Jensen
patent: 2250610 (1941-07-01), Simons
patent: 2289398 (1942-07-01), Whist
patent: 3375690 (1968-04-01), Fink
patent: 4367641 (1983-01-01), Mitzutani
Hamana Iron Works Co., Ltd.
Jones David
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