Vaporizing foil actuator used for impulse forming and embossing of titanium and aluminum alloys

Vivek, Anupam; Brune, Ryan; Hansen, S.; Daehn, Glenn S.

doi:10.1016/j.jmatprotec.2013.12.003

Cited by 26 publications

(9 citation statements)

References 11 publications

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“…This is in line with the results of research conducted by [11], which states that the pressure in the workpiece can be reduced and the feature depth can be increased in the embossing process assisted with the high-density electric current. In the other study, Vivek et al stated that the aluminium plate AA2024-T3 could be embossed in a die with different depth [12]. Mai et al presented that an embossing process that can be done in a continuous and discontinuous mode in a roll-to-roll embossing process with micro-pattern replication with feature size up to 0.5 μm [13].…”

Section: Hardness (Hb) Uts (N/mm2)mentioning

confidence: 99%

Investigating the Performance of Embossing on Fins Wheel of Agricultural Tractor

Muhammad¹,

Nur²

2017

Proceedings of the 2nd International Conference on Education, Science, and Technology (ICEST 2017)

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Abstract-The Fins wheel of the tractor was the most important part of a tractor to plough the field. Fins wheel was damaged due to lack of ability fins tractor wheels withstand bending loads as well as influenced by the age of the fin itself. This study was conducted to determine how the effects of embossing on the maximum bending load, deflection, ultimate tensile strength, and hardness which occur by using variations of the embossing number 1 and 2, and high embossing of 4, 5, 6 mm. The type of material used is JIS 3101 SS 400 with a thickness plate of 3.8 mm. This research was conducted by starting the design and press tool manufacture (punch & dies), manufacturing materials to be formed into fins wheel tractor, forming plates become fins wheel tractor, perform bending test to determine the maximum bending load strength and deflection that occurs. The experimental results showed that the finned wheel of the tractor which has two embossing with embossing height 6 mm would generate the smallest deflection of 4.93 mm and the maximum bending load of 4.0 kN. Fin wheel tractor with embossing can hold maximum bending loads greater than the soil pressure of 1.6 kN. Increasing the height of embossing will increase the hardness and ultimate tensile strength. The higher value of hardness and ultimate tensile strength was obtained at embossing height of 6 mm for 167,66 HB and 586,81 N/mm2 respectively.

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Section: Hardness (Hb) Uts (N/mm2)mentioning

confidence: 99%

Investigating the Performance of Embossing on Fins Wheel of Agricultural Tractor

Muhammad¹,

Nur²

2017

Proceedings of the 2nd International Conference on Education, Science, and Technology (ICEST 2017)

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“…From tB on, the intense pressure of the expanding vapor or plasma acts as forming pressure for the flyer plate. As investigated in Vivek et al (2014a), an elastomer plate (e.g. polyurethane) can be put between the foil and the workpiece to serve as an elastic transfer medium for the pressure pulse, which is then spread over an area larger than the actual geometry of the foil.…”

Section: Fundamentals Of Vaporizing Foil Actuators (Vfa)mentioning

confidence: 99%

“…A main factor of influence on achievable pressures, and therefore flyer velocities, is constituted by the amount of electrical energy D that can be deposited into the foil until it bursts. Referring to Vivek et al (2014a), it can be computed as…”

Section: Fundamentals Of Vaporizing Foil Actuators (Vfa)mentioning

confidence: 99%

Vaporizing foil actuator welding as a competing technology to magnetic pulse welding

Hahn

Weddeling

Taber

et al. 2016

Journal of Materials Processing Technology

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Photonic Doppler velocimetry was applied to compare magnetic pulse welding and vaporizing foil actuator welding against each other in the form of lap joints made of 5000 series aluminum alloy sheets under identical experimental conditions which are: charging energies of the pulse generator, specimen geometry, initial distances between flyer and target plate. Impact velocities resulting from rapidly vaporizing aluminum foils were up to three times higher than those of purely electromagnetically accelerated flyer plates. No magnetic pulse welds were achieved, while every vaporizing foil experiment yielded a strong weld in that failure always occurred in the joining partners instead of in the weld seam during tensile tests. An analytical model to calculate the transient flyer velocity is presented and compared to the measurements. The average deviation between model and experiment is about 11 % with regard to the impact velocity. Hence, the model may be used for the process design of collision welds generated by vaporizing foil actuators.

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“…Vivek et al [9] conducted a hybrid experiment by preforming a titanium sheet quasi-statically first, and the final cell case geometry was calibrated by VFAF subsequently to form fine features. The process parameters yielding the best appearing result were found after different experimental tryouts.…”

Section: Introductionmentioning

confidence: 99%

Part-optimized forming by spatially distributed vaporizing foil actuators

Hahn

Tekkaya

2021

Int J Mater Form

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Electrically vaporizing foil actuators are employed as an innovative high speed sheet metal forming technology, which has the potential to lower tool costs. To reduce experimental try-outs, a predictive physics-based process design procedure is developed for the first time. It consists of a mathematical optimization utilizing numerical forming simulations followed by analytical computations for the forming-impulse generation through the rapid Joule heating of the foils. The proposed method is demonstrated for an exemplary steel sheet part. The resulting process design provides a part-specific impulse distribution, corresponding parallel actuator geometries, and the pulse generator’s charging energy, so that all process parameters are available before the first experiment. The experimental validation is then performed for the example part. Formed parts indicate that the introduced method yields a good starting point for actual testing, as it only requires adjustments in the form of a minor charging energy augmentation. This was expectable due to the conservative nature of the underlying modeling. The part geometry obtained with the most suitable charging energy is finally compared to the target geometry.

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Vaporizing foil actuator used for impulse forming and embossing of titanium and aluminum alloys

Cited by 26 publications

References 11 publications

Investigating the Performance of Embossing on Fins Wheel of Agricultural Tractor

Investigating the Performance of Embossing on Fins Wheel of Agricultural Tractor

Vaporizing foil actuator welding as a competing technology to magnetic pulse welding

Part-optimized forming by spatially distributed vaporizing foil actuators

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