DefinePK

Abstract

Forming spiral steel pipes with roll bending is metal forming process which sheet metal become tube, cylinder and others. To get certain curvature radius and efficient phase roll bending is hence needed by a good planning and as accurately as in order to got the product which with quality. Roll bending planning that is roll diameter 164 mm, two roll of under diameter 150 mm of second roll distance of under 203 mm, and upright 159 mm hence can be searched of curvature with decrease upper roll ?h. To get certain curvature radius, used the formula relation its is roll for with curvature radius that happened. The formula result for the curvature radius equal to 2,585.,5 mm needed of step roll bending 4 times, that is decrease upper roll ?hin mm respectively is 15; 30; 45 and 70.Bending radius in mm is 12,366.69 ; 6,099.59; 4,045.5; and 2,585.5. Bending force in kg respectively is 1,831.58; 6,836.27; 17,400.58; and 41, 890., 87. From four times of roll bending process, the bending power is 2013, 64 kW.