DOI: 10.18503/1995-2732-2025-23-3-79-86
Abstract
Problem Statement (Relevance of the Work). The production of cold-drawn capillary-sized tubes employs the long mandrel drawing process. After drawing, the mandrel is extracted from the tube. To ensure efficient process execution and subsequent extraction, it is necessary to substantiate the extraction parameters for the long mandrel upon completion of the process. Selecting the settings for known extraction mechanisms is challenging due to insufficient research on the process, which in practice leads to surface defects during mandrel extraction or reduced process effi-ciency during setup. Objective. It is to simulate the long mandrel drawing process using a small-sized tube as an exam-ple, taking into account the elastic and plastic properties of the components in the system. This will allow for an as-sessment of the stress distribution between the tube and the mandrel after drawing, as well as the required load levels to reduce interference during mandrel extraction. Methods Used. For the volumetric formulation of the problem concern-ing the stress-strain state of the tube and mandrel material in the deformation zone, the DEFORM 3D simulation soft-ware is used. This software is based on the finite element method (FEM) for elastoplastic flow problems with passive unloading. Graph processing employs methods of mathematical statistics and linear approximation. Novelty. Develop-ment of a mathematical model for the drawing process of small-sized tubes on a mandrel, which accounts for the geo-metric features of the tool and blank, the elastoplastic properties of the blank, and the elastic properties of the mandrel, and also allows for variation in drawing parameters. Results. For the first time, data on the distribution of residual stresses and normal pressures between the drawn tube and the long mandrel have been obtained. Practical Signifi-cance. The model can be used to acquire new data on the tube rolling process after drawing.
Keywords
cold-drawn tubes, tube rolling mill, reeling machine, thin-walled tubes, longitudinal defects
For citation
Fedulov A.A., Kamenechki V., Bulganina M.Y. Modeling the Process of Long Mandrel Drawing for Capillary Tubes to Assess the Stress-Strain State Before the Mandrel Extraction. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2025, vol. 23, no. 3, pp. 79-86. https://doi.org/10.18503/1995-2732-2025-23-3-79-86
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