Experimental and numerical study on the deformation mechanism of straight flanging by incremental sheet forming

2019 ◽  
Vol 160 ◽  
pp. 75-89
Author(s):  
Kai Han ◽  
Xiaoqiang Li ◽  
Xingyi Peng ◽  
Haibo Wang ◽  
Dongsheng Li ◽  
...  
Keyword(s):  
Deformation Mechanism ◽  
Numerical Study ◽  
Sheet Forming ◽  
Incremental Sheet Forming

Deformation Analysis of Multi-Stage Incremental Sheet Forming

2010 ◽  
Author(s):  
Zhen Cui ◽  
Feng Ren ◽  
Z. Cedric Xia ◽  
Lin Gao
Keyword(s):  
Incremental Forming ◽  
Numerical Study ◽  
Axial Direction ◽  
Sheet Forming ◽  
Incremental Sheet Forming ◽  
Deformation Analysis ◽  
Conical Part ◽  
Forming Process ◽  
Deformation Kinetics ◽  
Deformation Mechanics

This paper presents an analytical and numerical study of deformation analysis for multistage incremental sheet forming processes, with a truncated conical part is used as an example. Unlike in the single-pass incremental forming where the sheet deformation is dominantly plane strain in the axial direction when forming a conical part, the sheet is also deformed in the circumferential direction when it is incrementally formed subsequently. Ideal deformation kinetics is assumed in the analytical derivations of strain distributions, which should be valid as long as the increment in deformation from one stage to the next is small. Numerical simulations with LS-DYNA are also conducted in an effort to understand the fundamental deformation mechanics of multistage incremental forming. The simulation result for a five-stage incremental forming process is presented. It is also used to correlate the analytical solution. An improved analytical equation for strain distributions is derived, which compares favorably with simulation results.

scholarly journals Numerical Study of Incremental Sheet Forming Processes

2018 ◽  
Vol 1063 ◽  
pp. 012017 ◽  
Author(s):  
H Kim ◽  
T Park ◽  
R Esmaeilpour ◽  
F Pourboghrat
Keyword(s):  
Numerical Study ◽  
Sheet Forming ◽  
Incremental Sheet Forming

Multiobjective optimization of process variables in single-point incremental forming using grey relational analysis coupled with entropy weights

2021 ◽  
pp. 146442072110204
Author(s):  
Abdulmajeed Dabwan ◽  
Adham E Ragab ◽  
Mohamed A Saleh ◽  
Atef M Ghaleb ◽  
Mohamed Z Ramadan ◽  
...  
Keyword(s):  
Grey Relational Analysis ◽  
Incremental Forming ◽  
Single Point ◽  
Sheet Forming ◽  
Incremental Sheet Forming ◽  
Numerical Control ◽  
Single Point Incremental Forming ◽  
Process Variables ◽  
Relational Analysis ◽  
Grey Relational

Incremental sheet forming is a specific group of sheet forming methods that enable the manufacture of complex parts utilizing computer numerical control instead of specialized tools. It is an incredibly adaptable operation that involves minimal usage of sophisticated tools, dies, and forming presses. Besides its main application in the field of rapid prototyping, incremental sheet forming processes can be used for the manufacture of unique parts in small batches. The goal of this study is to broaden the knowledge of the deformation process in single-point incremental forming. This work studies the deformation behavior in single-point incremental forming by experimentally investigating the principal stresses, principal strains, and thinning of single-point incremental forming products. Conical-shaped components are fabricated using AA1050-H14 aluminum alloy at various combinations of fundamental variables. The factorial design is employed to plan the experimental study and analysis of variance is conducted to analyze the results. The grey relational analysis approach coupled with entropy weights is also implemented to identify optimum process variables for single-point incremental forming. The results show that the tool diameter has the greatest effect on the thinning of the SPIF product, followed by the sheet thickness, step size, and feed rate.

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