Patent ID: 6279812
Filing Date: 2001-08-28
Classification: B23P,F02K,F05D

Abstract:
A method for producing rotationally-symmetrical sheet metal aarticles having a double-curved shape and varying thickness, particularly conical or bell-shaped articles, in which a number of flat sheet metal part-blanks are cut into a partially circular ring shape, whereupon said sheet metal part-blanks thus cut are bent into a desired curvature about an intended axis of symmetry and welded together to form a blank for final machining, wherein:the sheet metal part-blanks are each formed by welding together a number of strip sheet metal pieces of different thickness along their straight edges in side-by-side relationship to forma sheet metal plate with a width which corresponds to a whole length of one of the articles and having a stepwise decreasing thickness of material from one side to the other side of said sheet metal plate, whereupon said sheet metal plate is cut into a particularly circular ring shape, and then bent along the axis of symmetry of the article, and whereinthe sheet metal part-blanks are welded together along their adjacent straight and non-parallel sides to form the blank for the article.