. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . ane passing through the axis of the ingot, D, and man-drel, E. Moreover, the angle, e, of the maiulrel is a little more open than that of the roll-ing generatrices of the mushroom-shaped rollers, so that the lamination compresses and re-duces the thickness of the sides of the tubes on the mandrel, while its diameter at the sametime increases. Prom 12 will be seen how a tube may be made by means of two successiveoper
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . ane passing through the axis of the ingot, D, and man-drel, E. Moreover, the angle, e, of the maiulrel is a little more open than that of the roll-ing generatrices of the mushroom-shaped rollers, so that the lamination compresses and re-duces the thickness of the sides of the tubes on the mandrel, while its diameter at the sametime increases. Prom 12 will be seen how a tube may be made by means of two successiveoperations, one of them preparatory, and consisting in tubing the axis of the ingot by thediagonal rolling of the plates, i^/, and the other a finishing operation, consisting in widen-ingthe tube on the mandrel, E. In this ease the rollers, A a, may be given a velocity suchas to make the mandrelled part of the tube rotate more rapidly than that part of the ingotsubmitted to the action of the plates, F f. Diagrams 13 to IS show how it is possible to make a tube directly with but a single pairof rollers, G y. Before approaching the mandrel, E, as shown at 14, the ingot {13), held. Fici. 7.—Manufacture of spirally welded tubing. between the converging generatrices at O g, undergoes a preparation that reduces its dia-meter and hollows its extremity at d {14), so that it can favorably meet the point of themandrel in passing from the converging to the diverging generatrices of the rollers. Thetubular part of the ingot is then, as shown at 15. pushed along and compressed on the man-drel through the gradual action of G g, and converted into a thin-sided tube, until the pos-terior end of the ingot leaves the rollers. When the entire manufacture of the tube iseffected by means of a single pair of cones, it is necessary that the torsion given to the ingotby the converging generatrices during the first part of the operation {13 and 14) shall not bedestroyed during the widening and calibratin
Size: 1626px × 1536px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
