Balance of stresses and deformations during cold bending of sheet-shipbuilding steel

Abstract

The process of development and implementation by the authors of the guideline document RD 5.05.08.04-20 Methodology for the development of technological instructions for cold bending of parts from sheet shipbuilding steel in the hull production of JSC Vostochnaya Verf (Vladivostok) is described herein. The paper covers the results of theoretical and practical studies of the processes occurring in the structure of shipbuilding steel of ordinary and high-strength during angular and circular bending of hull parts of offshore structures. Calculation formulas are given to properly assign the operating parameters of hydraulic press equipment and technological equipment. The new approach proposed by the authors in the process of technological preparation of production made it possible to simulate the parameters of pressing equipment and tooling for angular bending, with the use of which formation of any defects is excluded. Preliminary calculations of the required power of the press allow using less energy-consuming equipment with a power reduction of 25%. At the same time, the calculated selection of technological equipment allows to reduce the number of working cycles of the bending press in half.