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Investigation of the stress state around the forming zone during the flow form process
CEBIROGLU Bugra, OZASLAN Emre, YETGIN Ali, ACAR Bulent
download PDFAbstract. Flow forming process is a cold metal forming process, which has great advantages over conventional forming techniques such as extrusion and tube drawing. Some advantages of the flow forming process are high material utilization, close dimensional tolerances and excellent surface finish. Flow forming finds extensive applications in industries such as aerospace, automotive, and manufacturing, where the demand for lightweight, durable, and intricately shaped components is crucial. Different types of geometries including thin-walled and axisymmetric cylindrical parts can be manufactured by flow form process. In flow forming process, the preform, which is clamped to a rotating mandrel, is formed by the rollers. It involves the incremental shaping of a rotating workpiece by applying axial compressive forces while simultaneously feeding it through a set of rollers. After the process, length of the preform is increased by decreasing the outer diameter. However, one of drawbacks of the process is the complex mechanical behavior around the forming zone. Understanding the material flow and stress state around the forming zone is crucial to perform a successful process. In this study, stress state around the forming zone was investigated numerically. After validating of 3-D explicit finite element model with the measured loads from experiments, a detailed examination of the stress state around the forming zone was performed numerically. Effects of different process parameters such as thickness on the stress state were emphasized. Also, differences between the stress states around the forming zone of the forward and backward flow form processes, which are two different techniques of the flow form process, were stated. It is also shown that different stress states occur at different stages of the process. Finally, the relation between stress state and failure mode was explained.
Keywords
Flow Forming, Finite Element Modeling, Stress State
Published online 4/24/2024, 6 pages
Copyright © 2024 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: CEBIROGLU Bugra, OZASLAN Emre, YETGIN Ali, ACAR Bulent, Investigation of the stress state around the forming zone during the flow form process, Materials Research Proceedings, Vol. 41, pp 1456-1461, 2024
DOI: https://doi.org/10.21741/9781644903131-161
The article was published as article 161 of the book Material Forming
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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