METHOD OF MAKING WELDED THIN-WALL CONICAL SHELLS WITH STIFFNESS RIBS

摘要

FIELD: process engineering.SUBSTANCE: this intention is used for making thin-wall conical shells with stiffness ribs by welding. Shell segments are made. Segment lengthwise edges are turned up to make stiffness ribs while segments are placed at detachable support plates arranged on carcass base to make a conical surface with clearance between lateral edges of adjacent support plates. Shell segments are placed at said carcass with turned up edges in clearances between support plates. Segments are subjected to transverse contraction unless edges of adjacent segments are jointed. Then, said segments are locked at said base and welded together along the lengthwise edges from outside. Then, detachable carcass support plates are withdrawn. Produced shell is withdrawn from said carcass together with detachable plates. Produced shell is machined. Welded shell has stiffness ribs made integral with the material of segments to up the strength.EFFECT: higher reliability.7 dwg