Formation of fibrous macrostructure in a bearing ring at stamping and rolling

Authors

DOI:

https://doi.org/10.15587/1729-4061.2017.101289

Keywords:

bearing ring, fibrous structure, viscous plasticity, stamping, unrolling, method of finite elements

Abstract

The numerical modeling of the technological process of stamping and unrolling of a bearing ring is carried out. By using the method of finite elements, we obtained a numerical solution of the problem on thermal conductivity and the contact problem on thermo-viscous-plasticity for determining the shape-changing of the billet of a bearing ring in the process of stamping and unrolling. When modeling, at each subsequent step of the solution of a boundary problem, we assign as the initial state a distribution of the temperature field of the billet of a bearing ring, which was established at the end of each technological operation. An analysis of distribution of the Lagrange lines revealed changes in the distribution of fibrous structure of the billet material of a bearing ring at sequential technological operations of die forging and unrolling. It is proposed to use double-pass molding and, additionally, unrolling for displacing the exit of fibers from the raceway to the surface of board and forming the rational fibrous macrostructure of the bearing ring billet. Results of numerical simulation with an accuracy of 4.7 % coincided with the distribution of fibrous macrostructure of material during metallographic analysis of the experimental sample of a bearing ring billet.

Author Biographies

Ludmila Avtonomova, National Technical University “Kharkiv Polytechnic Institute” Kyrpychova str., 2, Kharkiv, Ukraine, 61002

PhD

Department of solid state mechanics and strength of materials

Ievgen Grozenok, National Technical University “Kharkiv Polytechnic Institute” Kyrpychova str., 2, Kharkiv, Ukraine, 61002

Postgraduate student

Department of solid state mechanics and strength of materials

Valery Konkin, National Technical University “Kharkiv Polytechnic Institute” Kyrpychova str., 2, Kharkiv, Ukraine, 61002

PhD, Assistant Professor

Department of solid state mechanics and strength of materials

Eduard Simson, National Technical University “Kharkiv Polytechnic Institute” Kyrpychova str., 2, Kharkiv, Ukraine, 61002

Doctor of Technical Sciences, Professor

Department of solid state mechanics and strength of materials

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Published

2017-06-08

How to Cite

Avtonomova, L., Grozenok, I., Konkin, V., & Simson, E. (2017). Formation of fibrous macrostructure in a bearing ring at stamping and rolling. Eastern-European Journal of Enterprise Technologies, 3(1 (87), 63–68. https://doi.org/10.15587/1729-4061.2017.101289

Issue

Vol. 3 No. 1 (87) (2017): Engineering technological systems

Section

Engineering technological systems

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Copyright (c) 2017 Ludmila Avtonomova, Ievgen Grozenok, Valery Konkin, Eduard Simson

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