Study of Effect of Temperature on Forming Diameter and Thinning in Warm Incremental Forming of Aluminum Tubes

Document Type : Original Article

Authors

1 Assistant Professor, Department of Mechanical Engineering, Technical and Vocational University (TVU), Tehran, Iran.

2 Assistant Professor, Department of Mechanical Engineering, Kar Higher Education Institute, Qazvin, Iran.

3 Professor, Mechanical Engineering Department, Engineering Faculty, Shokatabad Campus, University of Birjand, Iran.

10.48301/kssa.2023.381133.2416

Abstract

Incremental forming process has the ability to make sheet parts with different cross-sections and sizes using simple and cheap forming tools. Using this process, it is possible to produce tubular sections, which are usually formed by hydroforming process. In this paper, the incremental forming of aluminum tubes with axisymmetric cross-section was investigated. A forming die setup was designed and manufactured to create symmetrical bulge on aluminum tubes, and the movement of the forming punch was performed by a CNC milling machine. In order to increase the formability of material, temperature of the tube was increased to a maximum of 300 degrees Celsius and the diameter of the formed part studied. Simulation of process was carried out using Abaqus software and ductile fracture criteria was used to find maximum formability. The results showed that the normalized Cockcroft-Latham criterion can be used with a small error to predict the maximum forming diameter. By increasing the process temperature from 100 to 200 °C, the forming diameter increased by 4%. The greatest effect of the forming step was observed at 300 °C, and with the increase of the step from 0.5 to 1.5 mm, the forming diameter decreased by 3.7%. The fracture section of the tubes was also examined by scanning electron microscope (SEM).

Keywords

References

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Karafan Quarterly Scientific Journal
Volume 20, Issue 3
Engineering
December 2024
Pages 129-148

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History

  • Receive Date: 18 January 2023
  • Revise Date: 19 April 2023
  • Accept Date: 11 June 2023

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