Effect of the material-hardening mode on the springback simulation accuracy of V-free bending

Li, Xuechun; Yang, Yingping; Wang, Yongzhi; Jin, Bao; Shunping, Li

doi:10.1016/s0924-0136(02)00055-9

Cited by 104 publications

(49 citation statements)

References 3 publications

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“…Zhang et al [6] studied experimentally on the deformation mechanisms of V-bending by deformable punches and dies and concluded that the selection of punch material is of great importance for a given work material. Li et al [7] considered the change of Young's modulus in plastic bending process and confirmed the accuracy of hardening mode and springback precision.…”

Section: Introductionmentioning

confidence: 87%

Study on springback in micro V-bending with consideration of grain heterogeneity

Fang

Jiang

Wei

et al. 2014

Int J Adv Manuf Technol

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With the new development of microforming technology, the demand on the accuracy of the metallic microcomponents is elevating. Springback phenomenon is inevitable during sheet metal forming process and can cause unpredicted dimensional error. The previous research found that the springback value in microforming is difficult to be assessed as the sizes of tools and specimens downsize hundreds even thousands times. This paper focuses on improving the prediction accuracy of springback during micro V-bending. A finite element (FE) model of the micro V-bending has been established via ABAQUS/Standard commercial software where the specimen's microstructure is represented by Voronoi tessellations. With the consideration of the grain heterogeneity, each Voronoi tessellation has been employed with different grain mechanical properties based on experimental results. Corresponding micro V-bending tests have been carried out, and a good agreement between the experimental and simulation results indicates that the developed FE model can accurately predict springback in micro V-bending.

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Section: Introductionmentioning

confidence: 87%

Study on springback in micro V-bending with consideration of grain heterogeneity

Fang

Jiang

Wei

et al. 2014

Int J Adv Manuf Technol

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“…With the thermal process, the sheet will become soft enough without crack, but hard enough not to be stripped off the metal. Also, in this way, the forming force of the metal will decrease especially for high tensile steel forming [3].…”

Section: Introductionmentioning

confidence: 99%

Study of Roll Forming Bending in Different Temperature

Zhang¹

2016

IJMSA

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Abstract:Flexible roll forming is a high efficiency sheet metal forming process for producing variable cross section profiles.Also spring-back is one of the most important problems in flexible roll forming process. Spring-back is severe during the unloading phase of bending and greatly affects the forming accuracy of the bending parts. In this paper, the spring-back of the flexible roll forming in different temperature have been studied using finite element analysis. The simulation is elaborated by using ABAQUS software linked to elastic-plastic modules which we developed taking into account of interactions between these fields. According to finite element analysis results, the bending after roll forming has been analyzed. Therefore, we can make the comparison of the spring-back and forming force under different temperature from the finite element analysis. A flexible roll forming setup was developed and some parameters in the simulation have been discussed. AZ31 magnesium alloys were used in the simulation and assumed the material is isotropic.

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“…It is well known from the tensile test that the elastic part of the total strain, which is recovered if the load is released, is equal to the ratio of the stress before unloading to the Young modulus. The tendency to elastic springback increases at increasing the strain hardening coefficient and at decreasing the elastic stiffness [21][22]. A complete knowledge of the springback phenomenon and its dependence on material and process variables is strongly required in order to develop effective real time process control systems.…”

Section: Introductionmentioning

confidence: 99%

Springback Characteristics of the Tailor-Welded 18g2a-E355 Steel Strips

Froń¹,

Stachowicz²

2013

Acta Metall Slovaca

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Recently many industry companies are trying to form different products by using tailor-welded blanks. A tailor-welded blank consists of two or more sheets that have been welded together in a single plane prior to forming. And the sheets joined by welding can be identical, or they can have different thickness, mechanical properties or surface coatings. Various welding processes, i.e. laser welding, mash welding, electron-beam welding or induction welding, can join them. Many studies presented a wide range of information about the formability and failure patterns of tailor-welded blanks and the springback of non-welded sheet metal parts. However, accurate prediction of the springback remains elusive, especially in the case of thick sheet metal. The purpose of this study was to predict the springback of the tailor-welded 18G2A-E355 steel strips. Especially, it was focused on comparing the differences of the mechanical properties and springback between the tailor-welded strips and non-welded ones under the same experimental conditions. The set-up mounted on the testing machine, instrumentation and process control system allows the rig to operate in displacement as well as load control. The MAG method with the Argon + CO 2 atmosphere was used for strips welding.

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Effect of the material-hardening mode on the springback simulation accuracy of V-free bending

Cited by 104 publications

References 3 publications

Study on springback in micro V-bending with consideration of grain heterogeneity

Study on springback in micro V-bending with consideration of grain heterogeneity

Study of Roll Forming Bending in Different Temperature

Springback Characteristics of the Tailor-Welded 18g2a-E355 Steel Strips

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