The Computer-Aided Design of Pass for the High Extremely Thin Wall Elliptical Welded Pipe

The beam-to-depth ratio of high extremely thin wall elliptical welded pipe´s is bigger, the diameter-thickness ratio is bigger, wall thickness is thinner, so it is difficulty to design the roll pass. In this paper, the specification and the difficult of the high extremely thin wall elliptical welded pipe is analyzed, the design method of roll pass is introduced. After the first round by into design, calculation of the variation of the pipe after each change ellipse dimensions are introduced, the ellipse sorties roller diameter of computer aided groove design, and introduced the roller structure design method.