Evaluation of bending limit curves of aluminium alloy AA6014-T4 and dual phase steel DP600 at ambient temperature

Saxena, Krishna Kumar; Das, Ipsita; Mukhopadhyay, J.

doi:10.1007/s12289-015-1271-6

Cited by 10 publications

(5 citation statements)

References 17 publications

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“…The square shape workpiece (60 x 60 mm) with the thickness of 1.0 mm was prepared using shearing machine. The three-point bending tests according to VDA 238-100 (Saxenal et al, 2017;Panich, 2017) were conducted with varying punch plate radii (0.4, 1, and 2 mm) due to obtaining the sufficient difference of bendability levels ( Figure 3). The testing apparatus was set up on a 25 tons universal testing machine.…”

Section: Materials and Methods Testpiece Material Test Rig And Testmentioning

confidence: 99%

“…The classical material properties commonly used to assess the deep-drawing process can be used to describe the material failure in bending process although they have different failure mechanisms. However, the Bending Limit Curve (BLC) based on the assessment of deformation changes at the bending edge, is often used as mentioned in Panich (2017) and Saxenal et al (2017).…”

Section: Introductionmentioning

confidence: 99%

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Bendability evaluation of sheet metals in three-point bending test by using acoustic emission features

Seemuang¹,

Panich²,

Slatter³

2017

j.appsci

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In this work, bendability evaluation of three sheet metals, a galvanized steel (JAC780Y), a stainless steel (SUS304) and a cold rolled steel (SPCC) was precisely investigated using an acoustic emission (AE) technique. A three-point bending test, with three different punch plate radii, was performed to evaluate the formability of the metal sheets in bending and hemming processes. Bending force-displacement curves were derived from the results of the tests and were correlated with AE features (Root Mean Square and Peak-to-Peak) that were extracted from data obtained during those tests. These correlations showed for the first time that AE techniques could be used to detect an intercrystalline fracture from bending behavior and also to evaluate the bendability of the given materials.

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Section: Materials and Methods Testpiece Material Test Rig And Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bendability evaluation of sheet metals in three-point bending test by using acoustic emission features

Seemuang¹,

Panich²,

Slatter³

2017

j.appsci

View full text Add to dashboard Cite

show abstract

“…O. Senol et al performed a spring-back analysis in the air bending process through experiment-based artificial neural networks (Ozgu et al, 2014). Many studies have also examined the effects of material properties, tool shapes and bending Sutasn THIPPRAKMAS* and Arkarapon SONTAMINO** temperatures on the spring-back characteristics and precision of bent parts constructed with difficult-to-form materials, such as aluminum alloy sheets (Thipprakmas and Boochakul, 2015), (Adnan et al, 2017), (Ren et al, 2017), , (Wang et al, 2017), (Thipprakmas, 2013); high-strength low-alloy (HSLA) sheets (Ghaei et al, 2015), (Leu, 2017), (Zajkani and Hajbarati, 2017), (Saxena et al, 2017), (Jiang and Dai, 2015); and magnesium alloy sheets (Xie et al, 2015), (Duc-Toan et al, 2012). The effects of the bend angle and tool radius on the spring-back characteristics of aluminum alloy sheets (A1100-O, (JIS)) in the U-bending process were studied (Thipprakmas and Boochakul, 2015).…”

Section: Introductionmentioning

confidence: 99%

Wiping Z-bending die design for precise part fabrication

Thipprakmas

Sontamino

2021

JAMDSM

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The use of Z-bent parts is increasing in many industrial fields. Moreover, the precision requirements for Z-bent part dimensions are becoming more stringent. Z-bent parts are commonly fabricated by two L-or V-bending processes, which cannot provide satisfactory precision. Therefore, a Z-bending process is needed. However, there are few studies on such processes, especially for asymmetrical Z-bent parts. In the present research, which is focused on the wiping Z-bending process, asymmetrical Z-bending die designs with asymmetrical bend radii and bend angles were investigated by using finite element method (FEM) simulations and laboratory experiments. The results showed that when fabricating the same Z-bent parts, different Z-bending die designs produced different stress distributions and different Z-bent part dimensions. Based upon the obtained results, the following die design recommendations were given. To fabricate asymmetrical bend radius Z-bent parts, the Zbending die should be designed with the larger bend radius on the punch side; however, the larger bend radius should be set on the die side when the accuracy of the large bend radius is of paramount importance. To fabricate asymmetrical bend angle Z-bent parts, the Z-bending die should be designed with the larger bend angle on the die side to provide better overall precision for the Z-bent part dimensions. To fabricate asymmetrical bend radius and bend angle Z-bent parts, the Z-bending die should be designed with the larger bend angle on the die side to provide better overall precision for the Z-bent part dimensions. This study confirmed that selecting a suitable Zbending die design is essential to fabricating precise Z-bent parts.

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“…The reduction was also linear connected to the pre-stretching level. Saxena et al [14] evaluated bending limit curves for AA6014 and stated that they were at a higher level compared to conventional FLC. This is also important when using drawbeads with its bending component.…”

Section: Introductionmentioning

confidence: 99%

Study of the mechanical properties of sheet metals drawn through drawbeads

Schmid

Merklein

2019

Manufacturing Rev.

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The use of modern materials leads to a need for detailed knowledge of the material flow. Drawbeads are one common way to control serial forming processes. Although they are already well investigated, the effect on the resulting mechanical properties after a drawbead passage is not analysed in detail yet. This work is showing the influence of a drawbead geometry used in deep drawing on typical mechanical properties. Therefore, different sheet metal materials are preloaded in a modified strip drawing test with commonly used drawbeads. In testing, three different levels of pressure between 2.5 MPa and 7.5 MPa and of drawing speed between 10 mm/s and 50 mm/s are combined to nine variations and are examined. Afterwards, specimens are cut out by a laser cutting machine of the drawn strips. Those specimens are then tested with the use of an optical measurement system. Results are discussed in relation to blankholder pressure, drawing velocity and drawbead geometry to work out the main effects. Overall it can be stated, that variations of blank holder pressure and drawbead height lead to significant changes for the material properties. A variation of the drawing velocity in the observed range does not show significant effects.

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Evaluation of bending limit curves of aluminium alloy AA6014-T4 and dual phase steel DP600 at ambient temperature

Cited by 10 publications

References 17 publications

Bendability evaluation of sheet metals in three-point bending test by using acoustic emission features

Bendability evaluation of sheet metals in three-point bending test by using acoustic emission features

Wiping Z-bending die design for precise part fabrication

Study of the mechanical properties of sheet metals drawn through drawbeads

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