Hole flanging with cold extrusion on sheet metals by FE simulation

Lin, Heng-Sheng; Lee, Chien-Yu; Wu, Chia-Chun

doi:10.1016/j.ijmachtools.2006.02.002

Cited by 30 publications

(14 citation statements)

References 3 publications

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“…As through the thickness crack formation is the test stop criterion of the HE process, a fracture-based failure criterion was employed to predict the HER. [4] simulated the hole flanging by cold extrusion. They pointed that such process requires an excessive forming load when the punch directly applies on the top face of the whole blank.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis and Experimental Investigations on Hub Forming in a Sheet by the Hole Expanding Technique

El-Abden

Atef

2020

JES. Journal of Engineering Sciences

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A numerical (finite element) simulation and experiments were carried out to form parts with hubs utilizing the hole expanding (HE) using different punch shapes (conical, flat and spherical) on AISI 1010 steel sheets with varying thickness (0.8, 1.00, 1.5 and 2mm). Five pre-hole diameters (8, 10, 12, 16 and 20 mm) were used. Effects of punch shape, sheet thickness and pre-hole diameter on load/displacement curves and failure modes were investigated. FE-predicted results showed that the punch shape, sheet thickness and pre-hole diameter were the controlling factors of the formability achieved in the process. From the experimental results, it was noticed that the required load was increased by increasing the sheet thickness and decreasing the pre-hole diameter. Effect of sheet thickness on the displacement at which maximum load occurs was not clear. FE simulation results proved to agree with to the experimental results reflecting the effect of controlling parameters and the beginning of damage modes. Limit processing curves, showing safe and unsafe regions could be determined.

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Section: Introductionmentioning

confidence: 99%

Finite Element Analysis and Experimental Investigations on Hub Forming in a Sheet by the Hole Expanding Technique

El-Abden

Atef

2020

JES. Journal of Engineering Sciences

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“…Wu et al (2004) studied the flanging and reshaping processes of a clutch hub and proposed an optimized approach to prevent local cracking. Lin et al (2007) studied the wall height and thickness variation in the flanging process, and designed a special mould to obtain a higher flanged wall. Wang et al (2008) proposed a sheet metal stamping-forging process in which a car fly panel part was formed by firstly drawing and then forging, so as to thicken the wall.…”

Section: Introductionmentioning

confidence: 99%

A single-step hot stamping-forging process for aluminum alloy shell parts with nonuniform thickness

Jin

Wang

Deng

et al. 2016

Journal of Materials Processing Technology

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“…2, are the poor squareness of the flange edge, large die-roll formation, and fracture. Previously, several authors [1][2][3][4][5][6][7][8][9][10][11] have studied the hole flanging process and its associated problems. Chen [1] analyzed the forming limit in the elliptical hole flanging process.…”

Section: Introductionmentioning

confidence: 99%

“…Sartkulvanich et al [3] investigated the effects of blanked edge quality on stretch flanging of advanced high-strength steel using the finite element method (FEM). Lin et al [4] and Cao et al [5] studied hole flanging with cold extrusion on sheet metals by FEM simulation. Cui and Gao [6] studied the hole flanging process using multistage incremental forming.…”

Section: Introductionmentioning

confidence: 99%

Finite element analysis of flange-forming direction in the hole flanging process

Thipprakmas

Phanitwong

2011

Int J Adv Manuf Technol

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The hole flanging process, in which a pre-holed workpiece is expanded by a larger punch, is frequently used in many industries. However, due to the large number of process parameters and their complicated relationships, poor flange edge squareness is commonly generated and results in an increase of secondary operation. In this study, to improve the quality of flange parts, finite element method (FEM) was used to investigate the flange-forming mechanism and effects of upward and downward burr orientation flange-forming directions. Laboratory experiments were performed to validate the accuracy of the FEM simulation results. The FEM simulation results clearly explained the flange-forming mechanism, as well as the effects of flange-forming direction, based on stress distribution analysis. Upward and downward burr orientation flange-forming directions were suitably applied for large and small hole expansion ratios, respectively. In addition, the effects of other process parameters related to the flangeforming direction, including punching clearance, flange thickness, and hole expansion ratios, were also investigated. The FEM simulation results showed good agreement with the laboratory experiments. These results showed that to achieve good squareness at the flange edge, the use of upward and downward burr orientation flange-forming direction and its relation to the other process parameters need to be considered.

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Hole flanging with cold extrusion on sheet metals by FE simulation

Cited by 30 publications

References 3 publications

Finite Element Analysis and Experimental Investigations on Hub Forming in a Sheet by the Hole Expanding Technique

Finite Element Analysis and Experimental Investigations on Hub Forming in a Sheet by the Hole Expanding Technique

A single-step hot stamping-forging process for aluminum alloy shell parts with nonuniform thickness

Finite element analysis of flange-forming direction in the hole flanging process

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