Method for manufacturing complex-curvature tubular products, such as elm coils

Abstract

A method for manufacturing a complex-curvature tubular product starting from a metal tube extending along a rectilinear longitudinal axis is provided. The method includes carrying out, by a first bending device, a plurality of first bending operations, each first bending operation being carried out on a respective first straight portion of the metal tube, and in a bending plane passing through the longitudinal axis, so that the metal tube leaving the first bending device has a respective plurality of first curved portions, separated by second straight portions, and carrying out on the metal tube leaving the first bending device, by a second bending device, a plurality of second bending operations, each second bending operation being carried out on one of the second straight portions so that the metal tube leaving the second bending device has, between each pair of consecutive first curved portions, a respective second curved portion, and the tubular product thus obtained has first and second curved portions immediately adjacent to each other.

Dependencies are inferred from the claim text.