Abstract
The springback phenomenon occurring during cold forming is the main problem affecting the dimensional accuracy of bent products, especially when bending thin-walled profiles, where there are significant changes in the cross-section geometry. This article presents the results of the analysis of the springback phenomenon occurring during shaping with a pure bending moment of square tubes with the cross-sectional dimensions of 21.5 × 21.5 × 1.8 mm and 25 × 25 × 2.5 mm made of aluminum alloy 6060. The springback characteristics were determined by defining the dependence of the springback coefficient on the set bending radius of the band. The values of the springback coefficient were provided by means of analytical calculations and numerical modeling, which considered changes in the moment of inertia caused by deformation of the cross-section occurring during bending of the pipes. A good agreement of the calculation results with the results of experimental tests was obtained. In addition, the stress state and the state of deformation, as well as the springback characteristics of square-section pipes were compared with the results obtained during bending of a solid bar with the cross-sectional dimensions of 21.5 × 21.5 mm.
Highlights
The size of the2.5 given andaluminum the shapealloy of thetype bent stripThe mmbending extrudedradius from the samples cut f. When it comes to the analysis of the springback phenomenon during the bending process the profile wall were tested under uniaxial tensile tension
This work presents the results of the analysis of the springback phenomenon observed during elastic-plastic cold shaping of profiles loaded with a pure bending moment, with particular emphasis on changes in the cross-sectional geometry of square tubes bent
The results of analytical calculations and numerical modeling were in good agreement with the results of experimental tests
Summary
During cold plastic forming of bent products, two main phases can be distinguished: Academic Editor: Bolv Xiao. The springback characteristics of the pipe qualitative and quantitative description of the springback phenomenon was and still iswill thebe compa with the springback characteristics of a solid profile with the same external dimension subject of many scientific, theoretical and experimental studies. In the case of bending into large curves, or during bending processes involving axial forces, when analyzing the state of deformation on the cross-section of
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