Method of bending a sheet metal part with constant curvatures

Abstract

The method of bending a sheet metal part with constant curvature is carried out by determining the radius of curvature and the length of a section of the sheet metal strip (11). Next, the angle of rotation (φ) of the lower roll (1) is determined. For the ratio of the selected offset (f) of the rotation axis of the rolls (1, 2) to the external radius (D) of the upper roll (2), the relationship between the value of the pressing force (P(φ)) of the rolls (1, 2) and the bending curvature is determined, and subsequently, from this relationship, the value of the pressing force (P(φ)) is determined. The pressure in the actuators is set via a hydraulic pressure regulator, and then the controller reads the reading of the position angle sensor of the lower roll (1), and the motor is started, which, through a gear, sets the lower roll in motion and begins bending the sheet metal (11), which is carried out until the radius of curvature is achieved along a specified length of the sheet metal strip (11).The lower roller (1) stops at its current angular position, and the next radius of curvature and the length of the next sheet metal strip (11) are determined to create this new radius of curvature. This process is repeated until constant radii of curvature are achieved, along the specified lengths of the bent sheet metal strip (11).