Incremental sheet forming with active medium

Khalifa, Nooman Ben; Thiery, Sebastian

doi:10.1016/j.cirp.2019.04.043

Cited by 15 publications

(8 citation statements)

References 12 publications

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“…Incremental sheet forming with active medium (IFAM) is a novel manufacturing process to produce concave-convex geometrical parts in small lot sizes [1]. This process an extension of the well-known single point incremental forming (SPIF) by an active medium, which applies pressure on the bottom surface of the blank during the forming process.…”

Section: Introductionmentioning

confidence: 99%

“…The active medium can be gas or liquid. Ben Khalifa and Thiery [1] used pressurized air for convex forming.…”

Section: Introductionmentioning

confidence: 99%

“…For this reason, forming forces and pressure of the active medium are comparatively low. Ben Khalifa and Thiery [1] investigated the minimum pressure that is required to enable convex forming. While machining AA1050A-H14 sheets with a thickness of 1 mm, the relatively low minimum pressure value of 0.35 bar can lead to cracks if the forming operation is repeated multiple times at the same area.…”

Section: Introductionmentioning

confidence: 99%

“…While machining AA1050A-H14 sheets with a thickness of 1 mm, the relatively low minimum pressure value of 0.35 bar can lead to cracks if the forming operation is repeated multiple times at the same area. Cracks are the dominant failure mechanism of IFAM and are reported for both convex and concave forming [1,3,4]. On the one hand, pressure has to be adjusted during the process to avoid cracks and to limit bulging.…”

Section: Introductionmentioning

confidence: 99%

“…In their previous work, Ben Khalifa and Thiery [1] formed concave-convex parts while manually adjusting the pressure. As such, forming parts using constant pressure levels was not investigated.…”

Section: Introductionmentioning

confidence: 99%

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Closed-loop control of product geometry by using an artificial neural network in incremental sheet forming with active medium

et al. 2020

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A strategy to adjust the product geometry autonomously through an online control of the manufacturing process in incremental sheet forming with active medium is presented. An axial force sensor and a laser distance sensor are integrated into the process setup to measure the forming force and the product height, respectively. Experiments are conducted to estimate the bulging behavior for different pre-determined tool paths. An artificial neural network is consequently trained based on the experimental data to continuously predict the pressure levels required to control the final product height. The predicted pressure is part of a closed-loop control to improve the geometrical accuracy of formed parts. Finally, experiments were conducted to verify the results, where truncated cones with different dimensions were formed with and without the closed-loop control. The results indicate that this strategy enhances the geometrical accuracy of the parts and can potentially be expanded to be implemented for different types of material and geometries.

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Section: Introductionmentioning

confidence: 99%

“…The active medium can be gas or liquid. Ben Khalifa and Thiery [1] used pressurized air for convex forming.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Closed-loop control of product geometry by using an artificial neural network in incremental sheet forming with active medium

et al. 2020

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On the Geometrical Accuracy in Incremental Sheet Forming

et al. 2021

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Flexible Manufacturing of Concave–Convex Parts by Incremental Sheet Forming with Active Medium

Thiery

Khalifa

2021

Forming the Future

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show abstract

Incremental sheet forming with active medium

Cited by 15 publications

References 12 publications

Closed-loop control of product geometry by using an artificial neural network in incremental sheet forming with active medium

Closed-loop control of product geometry by using an artificial neural network in incremental sheet forming with active medium

On the Geometrical Accuracy in Incremental Sheet Forming

Flexible Manufacturing of Concave–Convex Parts by Incremental Sheet Forming with Active Medium

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