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A new approach to reduce springback in sheet metal bending using digital image correlation

  • Wan Xu , Junrui Li , Boyang Zhang and Lianxiang Yang
Published/Copyright: August 7, 2019
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 110 Issue 8

Abstract

Springback caused by elastic recovery is known to be a major disadvantage in sheet metal forming. Many studies focused on the prediction and compensation of springback in the bending process have used simulation and numerical methods, with experimental tests rarely being reported. A new approach, aimed at decreasing springback, is presented in this paper to solve the springback problem and provide a reference for other researchers. A new edge bending method called “incremental bending” has been developed and implemented on aluminum sheet at room temperature. Using this method, bending strain was lowered, leading to a reduction in springback. 3D Digital Image Correlation, an optical measurement technique, was adopted simultaneously to provide a high accuracy measurement of the full field strain distribution and springback curvature, making it very suitable for springback measurement. The experimental results show an obvious reduction of springback, which agrees well with the theoretical analysis. This work could help to minimize springback in sheet metal bending dramatically and improve formability and productivity, as well as provide a reference for researchers studying cold-bending. Details of the basic bending theory, experimental method, experimental results, and analysis will be demonstrated in the following content.

Keywords: Springback; Bending; Digital image correlation; Aluminum alloy
∗Correspondence address, Professor Lianxiang Yang, Department of Mechanical Engineering, Oakland University, 318 Meadow Brook Rd., Rochester, MI 48309, United States, Tel.: +1 248-370-2015, Fax: +1 248-370-4416, E-mail: , Web: https://www.oakland.edu/secs/directory/yang

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Received: 2018-12-06
Accepted: 2019-03-06
Published Online: 2019-08-07
Published in Print: 2019-08-12

© 2019, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111799
Keywords for this article
Springback; Bending; Digital image correlation; Aluminum alloy

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Dendritic solidification of highly undercooled dilute alloys
  5. Dendritic structure formation of magnesium alloys for the manipulation of corrosion properties: Part 2 – corrosion
  6. Thermodynamic properties of cerium molybdate
  7. A new approach to reduce springback in sheet metal bending using digital image correlation
  8. Effects of minor La and Ce additions on microstructure and mechanical properties of A201 alloy
  9. Strengthening and toughening of laminated TiAl composite sheets by titanium alloy layers and carbide particles
  10. A fractal analysis for the microstructures of β-SiC films
  11. Synthesis of La2(Zr0.7Ce0.3)2O7 nanopowder using a simple chemical precipitation method and heat treatment at high temperature
  12. Optimized microstructure with alumina micropowder and its effects on properties of phosphate-bonded castables
  13. Co-deposition and electrokinetic behavior of TiO2–WO3 nanoparticles under non-uniform AC field
  14. 3D nanoflower-structured TiO2 photoanode for efficient photoelectrochemical water splitting
  15. Short Communications
  16. Investigation of Al2O3/TiB2 ceramic cutting tool materials with the addition of core–shell structured Ni–B coated CaF2
  17. DGM News
  18. DGM News
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