METHOD OF MANUFACTURING OF SEAMLESS CORRUGATED CONES OUT OF SHEET BLANK, AND DEVICE FOR THIS METHOD IMPLEMENTATION Russian patent published in 2016 - IPC B21D13/00 

FIELD: metallurgy.

SUBSTANCE: from sheet a ring is cut out, it is free concentrically to the central axis is laid on the lower forming elements, then on the blank top forming elements are lowered, and forming is performed by bending simultaneously with change of the conicity angle by means of the forming elements pressing in vertical direction. Wherein the forming assembly is used, its top and lower forming elements are installed in alternating sequence along the circle, and one their end is secured on central axis of the forming assembly, and another end is secured with possibility of movement in radial guides, that are arranged with same spacing along the circle with axis of symmetry coinciding with the central axis of the forming assembly, and top forming elements are fixed in vertical position, for the initial blank manufacturing the ring is but out the sheet. Position change of the forming elements is ensured using position change means.

EFFECT: process capabilities and increased accuracy of corrugations manufacturing.

5 cl, 7 dwg