DOI: 10.18503/1995-2732-2024-22-3-71-80
Abstract
Relevance. A variety of non-rigid cylindrical parts such as shafts and axles are used to manufacture transport, agricultural, earth-moving and other machines. Manufacturing, repair, operation, and in some cases storage of such parts result in changes in their geometric shape and dimensions, that is, they become bent. Problems associated with bending of non-rigid parts arise already at the stage of their manufacturing. Therefore, in practice, repeated straightening operations are used to achieve the correct geometric shape of machine parts. Irkutsk National Research Technical University developed a method for straightening and strengthening non-rigid parts based on transverse rolling with smooth plates. However, to implement this straightening method, at first it is necessary to straighten a small central section of the workpiece, while maintaining the shape of its cross-section. Objectives. The research is aimed at determining the stress and strain state in a limited area of a cylindrical workpiece to assess the quality of straightening, process parameters and geometric distortion of the cross section of the workpiece. Methods Applied. Using 3D design software (Solidworks 2019) and computational modeling (Ansys Workbench 19.2), the authors built a model of the deformation process of the workpiece central part before straightening and calculated radial force to straighten the curved workpiece in a local area. Results. Having analyzed the results of finite element modeling, the authors established that radial force was 600 N for straightening a cylindrical workpiece made of steel 3 with diameter D of 10 mm, length l of 200 mm at initial deflection fо of 0.5 mm in the central area, 20 mm wide. This value of radial force does not entail defects of the geometric shape of the workpiece cross section and the maximum value of stresses in the cross section is less than yield strength of the material, ensuring the process of its downstream rolling with smooth plates.
Keywords
radial force, curved shaft, deflection, percentage reduction, stress and strain state, stress intensity, elastoplastic deformation, straightening, smooth plates
For citation
Zaides S.A., Bui M.D., Ponomarev B.B. Straightening a Local Area of Cylindrical Parts Before Rolling with Smooth Plates. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2024, vol. 22, no. 3, pp. 71-80. https://doi.org/10.18503/1995-2732-2024-22-3-71-80
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