Method for reshaping flat, plate-like elements into a bi-axially curved shape.

摘要

Method of reshaping flat, plate-like elements into a bi-axially curved shape, the elements being formed of materials having an elastic and plastic reshaping behaviour and the reshaping being effected by means of spherical blasting media acting on the elements under relatively high blasting pressure, and in particular elements having a geometry with a changing thickness or thickness increments according to steps of the method which include the mounting of the element (3) in concave position, a blasting treatment for the concavely arched side of the element by means of blasting media, direction of the jet of blasting media according to predetermined values along lines or tracks (11) which have the same or approximately the same extension, reduction of the blasting energy, starting from the centre or central area (M) towards the outer contour of the element, subsequent treatment of the element by means of impingement of blasting media on the convex side of the element and a separate blasting treatment of the marginal areas of the element. ……