Abstract:

Mathematical expressions were given for the part with 3-dimensional curved surface formed by continuous forming process based on the sweep surface method. A circular arc interpolation algorithm to deseribe the geometric shape in longitudinal direction of the formed part and the method to control the longitudinal forming process were presented through the analyses of the deformations in longitudinal and transverse directions of the sheel metal during the continuous forming process. A B-spline interpolation method to describe the shape of the flexible roll axis was proposed, and the method to control the shape of section curve of the formed surface was given. The validity of the presented methods was demonstrated by the continuous forming tests of the typical parts with curved surfaces.

Key words: materials synthesis and processing technology, sheet metal, continuous forming, flexible roll, curved surface, multi-point control