Improvement of formability for the incremental sheet metal forming process

Kim, Tae‐Jong; Yang, Dong‐Yol

doi:10.1016/s0020-7403(99)00047-8

Cited by 214 publications

(70 citation statements)

References 3 publications

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“…A double-pass forming method was proposed by Kim and Yang [24] to improve the formability of aluminium sheets in ISF. It was shown that the majority of deformation occurs by shear, which is an important factor to improve the formability.…”

Section: Formability In Spifmentioning

confidence: 99%

Review on the influence of process parameters in incremental sheet forming

Gatea

McCartney

2016

Int J Adv Manuf Technol

151

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Incremental sheet forming (ISF) is a relatively new flexible forming process. ISF has excellent adaptability to conventional milling machines and requires minimum use of complex tooling, dies and forming press, which makes the process cost-effective and easy to automate for various applications. In the past two decades, extensive research on ISF has resulted in significant advances being made in fundamental understanding and development of new processing and tooling solutions. However, ISF has yet to be fully implemented to mainstream high-value manufacturing industries due to a number of technical challenges, all of which are directly related to ISF process parameters. This paper aims to provide a detailed review of the current state-of-the-art of ISF processes in terms of its technological capabilities and specific limitations with discussions on the ISF process parameters and their effects on ISF processes. Particular attention is given to the ISF process parameters on the formability, deformation and failure mechanics, springback and accuracy and surface roughness. This leads to a number of recommendations that are considered essential for future research effort.

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Section: Formability In Spifmentioning

confidence: 99%

Review on the influence of process parameters in incremental sheet forming

Gatea

McCartney

2016

Int J Adv Manuf Technol

151

View full text Add to dashboard Cite

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“…The shear-based modeling for deformation pass design in ISF was first proposed in Kim et al (2000). However, this model is only suitable for double-pass deformation design.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, the proper allocation of materials during forming is important to uniformly distribute the material thickness on the final parts in order to avoid the occurrence of forming failure. Kim et al (2000) proposed a double-pass forming method to improve the formability for the ISF process. This method is based on shear deformation using the predicted thickness strain distribution to design intermediate shapes in order to get a uniform thickness distribution of a final part.…”

Section: Introductionmentioning

confidence: 99%

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Multi-pass deformation design for incremental sheet forming: Analytical modeling, finite element analysis and experimental validation

Liu

Daniel

et al. 2014

Journal of Materials Processing Technology

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Abstract:Incremental sheet forming (ISF) is a promising rapid prototyping technology with high potential to shape complex three-dimensional parts. However, a common technical problem encountered in ISF is the non-uniform thickness distribution of formed parts; particularly excessive thinning on severely sloped regions. This may lead to fracture and limit the process formability. Design of multi-stage deformation passes (intermediate shapes or preforms) before the final part, is a desirable and practical way to control the material flow in order to obtain a more uniform thickness distribution and avoid forming failure. In the present paper, a systematic methodology for designing multi-stage deformation passes considering the predicted thickness strains given the design shape is proposed based on the shear deformation and the strain compensation mechanism. In this methodology, two analytical models (M1 and region used in the forming (M2), respectively. The feasibility of the proposed design methodology is validated by finite element analysis (FEA) and experimental tests using an Amino ISF machine. The results show that a more uniform thickness strain distribution can be derived using M2. The incurrence of the highest strains can be delayed in the intermediate stages and the flow of material is allowed into the deformed region, thereby allowing a compressive stress state to develop and enabling steeper shapes to be formed. Therefore, the process formability can be enhanced via the optimized design of deformation passes.

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“…The largest design draw angle Φ in the part must be less than Φ max which can be considered as a material parameter limit [1]. It is reported however that accuracy of the obtained shape due to springback effect [4], heterogeneous thickness strain distribution [3] and fabrication time are limitations of the process. Furthermore, simulations by Finite Element methods are time-consuming because of the incremental characteristics of the process [1].…”

Section: Introductionmentioning

confidence: 99%

Single point incremental sheet forming investigated by in-process 3D digital image correlation

Decultot

Robert

Velay

et al. 2010

EPJ Web of Conferences

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Abstract. Single Point Incremental Forming (SPIF) is a promising sheet metal forming process for prototyping and small batches, in which the blank is formed in a stepwise fashion by a displacement-controlled small-sized tool. Due to specific strain paths induced by the process and limited plastic zones in the contact region between the tool and the workpiece, forming diagrams and forming strategies are different from the classical stamping processes. One major limitation of SPIF is the lack of accuracy of the obtained final parts because of the poor knowledge of the state of stress during the process that requires a good description of the material models and a right choice of the process parameters. In this paper, the SPIF process is experimentally investigated by the mean of surface 3D digital image correlation during the forming of a AW-5086-H111 grade aluminium alloy. Development of strain fields encountered in incremental forming is reported and material formability is evaluated on several formed shapes, taking into account a wide range of straining conditions of this process.

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Improvement of formability for the incremental sheet metal forming process

Cited by 214 publications

References 3 publications

Review on the influence of process parameters in incremental sheet forming

Review on the influence of process parameters in incremental sheet forming

Multi-pass deformation design for incremental sheet forming: Analytical modeling, finite element analysis and experimental validation

Single point incremental sheet forming investigated by in-process 3D digital image correlation

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