Investigation of the key process parameters in the hot forming of a shackle

  • J. Cochet
  • S. Thuillier
  • N. Decultot
  • P. Y. ManachEmail author


To investigate the impact of the variations of different input parameters in the multi-stage hot forging process of a shackle, an analysis is carried out through numerical simulations of the whole manufacturing process. Due to the complexity of the process and the large number of factors influencing the thermo-mechanical forming process, the investigation is focused on the workpiece positioning, the temperature of the tools, the transportation time and the contact-friction conditions. The analysis is narrowed down to the key stages of the process that are closed-die forging and ram bending. Coupled with experimental measurements, a comparison of forging loads, functional dimensions and shackle geometry is presented. It is shown that the conformation of shackle geometry to the industrial specifications depends mainly on the workpiece positioning and the transportation time. The dispersion measured in the forging load and in the main dimensions can thus be explained and these observations can be used to improve the manufacturing process for shackles.


Hot forming Process parameter variation Shackle Forging Ram bending 


Funding information

The authors gratefully acknowledge the financial support of the Brittany Region (France).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Springer-Verlag London Ltd., part of Springer Nature 2019

Authors and Affiliations

  • J. Cochet
    • 1
  • S. Thuillier
    • 1
  • N. Decultot
    • 2
  • P. Y. Manach
    • 1
    Email author
  1. 1.Université Bretagne Sud, UMR CNRS 6027, IRDLLorientFrance
  2. 2.Le Béon ManufacturingLorientFrance

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