Time Dependent Springback of a Magnesium Alloy

Li, B.; McClelland, Z.; Horstemeyer, S.J.; Aslam, Imran; Wang, P.T.; Horstemeyer, M.F.

doi:10.1002/9781118888179.ch13

Cited by 2 publications

(3 citation statements)

References 21 publications

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“…Cutting, bending and forming operations are widely used to shape these steels. The most serious problem in the press forming of HSLA sheets is their extremely large springback value [26]. Bending is one of the most commonly applied sheet metal forming operations.…”

Section: Introductionmentioning

confidence: 99%

“…In U and V sheet metal bending an algorithm has been developed that can be applied in U and V bending die by using the finite element method.Corner contact between workpiece and punch and the resulting friction effect, punch geometry, gap between punch, bending angle and other parameters, backward/forward stretching amounts have been analyzed by taking into account the amount of springback according to material thickness [18][19][20]. According to the die structure and the springback quantities, the springback amounts of hard-to-bend materials such as aluminum alloy sheets, high-strength low-alloy (HSLA) steel sheets [21][22][23], stainless steel sheets [24], magnesium alloy steel sheets [25][26], titanium alloy materials [27] have also examined. In the L bending process using titanium materials [28][29], it was found that cavity and punch radius decreases, the springback value increases, the strength coefficient (K value) of the material increases and the springback value also increases [30].…”

Section: Introductionmentioning

confidence: 99%

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Yüksek Mukavemetli Çeliklerde Geri Esnemenin Kalınlık Azaltma Yöntemi ile Telafisi

Toroslu

2022

Politeknik Dergisi

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The sheet metal bending process plays an important role in sheet metal production and springback is an unintended consequence of this operation. If the bending die process is performed without knowing the amount of springback, it is difficult to produce parts within acceptable tolerance values. The springback behavior of the part to be bent also affects the size of the bending die. In particular, in the case of a 90° U bend die, the manufacturing cost of the bending die with the springback compensation method is high. Therefore, it is important to estimate the springback value at the design stage. In this work, the estimation of the amount of deformation to avoid springback value was performed using the thickness reduction method for high strength sheet metal. According to this study, the thickness reduction method can be used effectively in springback compensation. The estimation of the measurement accuracy at the design stage reduces the cost of the bending die and it is possible to produce parts within tolerance limits without much experimentation. The results showed that thickness reduction at the 0,2 t value was suitable to eliminate the springback value in the U-bending process. It has been found that experimental, empirical and finite element results are close to each other.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Yüksek Mukavemetli Çeliklerde Geri Esnemenin Kalınlık Azaltma Yöntemi ile Telafisi

Toroslu

2022

Politeknik Dergisi

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“…By using this process, various ranges of parts with complex shapes can be fabricated with an economical setup. In the past, therefore, most research on the V-die bending process has focused on the different ways of developing the process design as well as on achieving precision bent parts via the finite element method (FEM) and experimental analysis (Xie et al, 2015), (Thipprakmas, 2011), (Phanitwong and Thipprakmas, 2014), (Thipprakmas, 2013), (Wang et al, 2015), (Xiong et al, 2015), (Ahmadi et al, 2017), (Thipprakmas, 2010), (Li et al, 2015), (Wang et al, 2013), (Leu, 2013), (Abea et al, 2017), (Hakan and Mustafa, 2013). For example, (Xie et al, 2015) applied the direct-current pulses technique on the V-bending of AZ31B magnesium alloy sheet and investigated the influence of direct-current pulses on the spring-back characteristics during the bending phase.…”

Section: Introductionmentioning

confidence: 99%

Spring-back factor applied for V-bending die design

Thipprakmas

2020

JAMDSM

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To fabricate various parts with complex shapes in the sheet-metal bending industry, the V-die bending process is commonly applied. To achieve precisely bent sheet-metal parts, the design of a proper V-bending die which could prevent the spring-back characteristic and obtain the required bend angle as well as control and maintain the required bend radius is needed. The predicted spring-back and bent radius could be basically calculated by using the spring-back factor. In the present research, therefore, the accuracy of the spring-back factor for bend angle prediction and bend radius calculation in the V-die bending process was examined based on the finite element method (FEM) and laboratory experiments. The two existing spring-back factors, including the conventional and adjusted spring-back factors, were investigated. The results showed that, compared with experimental results, the accuracy of the bend angle prediction and the bend radius calculation obtained using the adjusted spring-back factor were better than those obtained using the conventional spring-back factor. These results were clarified based on the stress distribution analysis of the sheet-metal bent parts. Therefore, the adjusted spring-back factor was recommended over the conventional spring-back factor for V-bending die design applications to achieve a better accuracy bend angle prediction and bend radius calculation.

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Time Dependent Springback of a Magnesium Alloy

Cited by 2 publications

References 21 publications

Yüksek Mukavemetli Çeliklerde Geri Esnemenin Kalınlık Azaltma Yöntemi ile Telafisi

Yüksek Mukavemetli Çeliklerde Geri Esnemenin Kalınlık Azaltma Yöntemi ile Telafisi

Spring-back factor applied for V-bending die design

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