Chinese Journal of Mechanical Engineering >

2021 , Vol. 34 >Issue 4: 43 - 43

DOI: https://doi.org/10.1186/s10033-021-00562-7

Intelligent Manufacturing Technology

Studying Formability Limits By Combining Conventional and Incremental Sheet Forming Process

  • Fabio Andre Lora ,
  • Daniel Fritzen ,
  • Ricardo Alves de Sousa ,
  • Lirio Schafer
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  • 1. Department of Materials Engineering, Federal University of Rec?ncavo da Bahia, Campus CETENS, Feira de Santana, Bahia 44085-132, Brazil;
    2. SATC University, Criciuma, Brazil;
    3. Center of Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal;
    4. Federal University of Rio Grande do Sul, Porto Alegre, Brazil

收稿日期: 2020-03-14

  修回日期: 2021-02-05

  网络出版日期: 2021-12-21

基金资助

This research was support by CNPq/DAAD 2010-Doutorado no Exterior–GDE Grant Number 290096/2010-3 in the form of a scholarship

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Studying Formability Limits By Combining Conventional and Incremental Sheet Forming Process

  • Fabio Andre Lora ,
  • Daniel Fritzen ,
  • Ricardo Alves de Sousa ,
  • Lirio Schafer
Expand
  • 1. Department of Materials Engineering, Federal University of Rec?ncavo da Bahia, Campus CETENS, Feira de Santana, Bahia 44085-132, Brazil;
    2. SATC University, Criciuma, Brazil;
    3. Center of Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal;
    4. Federal University of Rio Grande do Sul, Porto Alegre, Brazil

Received date: 2020-03-14

  Revised date: 2021-02-05

  Online published: 2021-12-21

Supported by

This research was support by CNPq/DAAD 2010-Doutorado no Exterior–GDE Grant Number 290096/2010-3 in the form of a scholarship

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摘要

In this work it is assessed the potential of combining conventional and incremental sheet forming processes in a same sheet of metal. This so-called hybrid forming approach is performed through the manufacture of a pre-forming by conventional forming, followed by incremental sheet forming. The main objective is analyzing strain evolution. The pre-forming induced in the conventional forming stage will determine the strain paths, directly influencing the strains produced by the incremental process. To conduct the study, in the conventional processes, strains were imposed in three different ways with distinct true strains. At the incremental stage, the pyramid strategy was adopted with different wall slopes. From the experiments, the true strains and the final geometries were analyzed. Numerical simulation was also employed for the sake of comparison and correlation with the measured data. It could be observed that single-stretch pre-strain was directly proportional to the maximum incremental strains achieved, whereas samples subjected to biaxial pre-strain influenced the formability according to the degree of pre-strain applied. Pre-strain driven by the prior deep-drawing operation did not result, in this particular geometry, in increased formability.

关键词： Hybrid forming process; Incremental sheet forming; Strain paths; Numerical simulation

本文引用格式

Fabio Andre Lora , Daniel Fritzen , Ricardo Alves de Sousa , Lirio Schafer . Studying Formability Limits By Combining Conventional and Incremental Sheet Forming Process[J]. Chinese Journal of Mechanical Engineering, 2021 , 34(4) : 43 -43 . DOI: 10.1186/s10033-021-00562-7

Abstract

In this work it is assessed the potential of combining conventional and incremental sheet forming processes in a same sheet of metal. This so-called hybrid forming approach is performed through the manufacture of a pre-forming by conventional forming, followed by incremental sheet forming. The main objective is analyzing strain evolution. The pre-forming induced in the conventional forming stage will determine the strain paths, directly influencing the strains produced by the incremental process. To conduct the study, in the conventional processes, strains were imposed in three different ways with distinct true strains. At the incremental stage, the pyramid strategy was adopted with different wall slopes. From the experiments, the true strains and the final geometries were analyzed. Numerical simulation was also employed for the sake of comparison and correlation with the measured data. It could be observed that single-stretch pre-strain was directly proportional to the maximum incremental strains achieved, whereas samples subjected to biaxial pre-strain influenced the formability according to the degree of pre-strain applied. Pre-strain driven by the prior deep-drawing operation did not result, in this particular geometry, in increased formability.

Key words： Hybrid forming process; Incremental sheet forming; Strain paths; Numerical simulation

参考文献

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