Investigation of formability of HC380LA material via the TPIF-RL incremental forming method

Şen, Nuri̇; Taşdemir, Vedat; Seçgin, Ömer

doi:10.1080/03019233.2019.1711351

Cited by 9 publications

(8 citation statements)

References 21 publications

(26 reference statements)

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“…22 The positive effect of the clamping pressure on the wall thickness is compatible with previous studies. 15,23 The R 2 values of variance analysis for forming force, surface roughness, and sheet thickness are 99.31%, 98.96%, and 95.87%, respectively (Table 4). Adjusted determination coefficients (adj R 2 ) is above 95%.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

Optimization of Titanium Grade 2 sheet forming by roller blank holder method

Seçgin

Özsert

2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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Incremental forming is a rapid prototype production method, which can be used in different industrial applications. In this context, it can be used especially in forming of Titanium Grade 2 sheet as depending on the types of manufacture. The main problem of the incremental forming method is that the wall thickness of the piece obtained after the process is not homogeneous. In this study, Titanium Grade 2 sheet was formed 60° axially symmetrical cone geometry using the roller blank holder method (TPIF-RL), which is a new approach. This method provides bigger wall thickness than the conventional incremental forming method considering its results. In this study, it was aimed to investigate the effectiveness of the new roller blank holder method on titanium material. In the experiments, the axisymmetrical piece with a height of 40 mm was formed (the forming angle is 60° with the horizontal). Feedrate, clamping pressure, increment, and forming tool diameter were used as parameters. Forming force, surface roughness, and wall thickness distributions obtained as a result of experimental studies were examined statistically. The interactions of the parameters were evaluated, and optimum levels of forming parameters were determined for the roller blank holder method. In addition, by using gray relational analysis, parameter levels of three dependent variables (forming force, surface roughness, and sheet thickness) were defined to optimize at the same time. As a result, bigger wall thickness was obtained with a low clamping force considering roller blank holder method. It was determined the levels that optimize the three parameters together were 2 bar pressure, 500 mm/min feed rate, 0.25 mm increment, and 5 mm forming tool diameter. Bigger wall thickness was obtained with a low clamping force considering roller blank holder method.

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Section: Discussion Of Resultsmentioning

confidence: 99%

Optimization of Titanium Grade 2 sheet forming by roller blank holder method

Seçgin

Özsert

2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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“…As the increase in the holding pressure prevented the material from flowing into the mold, further thinning of the wall occurred. Şen et al [ 26 ] determined that the wall thickness of the material decreased with the increase in holding pressure.…”

Section: Resultsmentioning

confidence: 99%

Optimization of Incremental Forming of Low‐Alloy High‐Yield‐Strength HC300LA Sheet Using a Rolling Blank Holder Method

Taşdemir

2020

steel research int.

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Incremental sheet metal forming is a method that enables the fast and flexible production of complex geometric parts using a very simple set of forms. However, this method presents some problems including wall thickness and spring‐back. Different methods are developed to solve these problems. One of these, the rolling blank holder method, is applied in this study using a 1 mm‐thick HC300LA sheet. The effects of holding pressure, increment size, forming tool diameter, and feed rate parameters on spring‐back, wall thickness, surface roughness, and forming force are investigated in the experiments conducted using the two‐point incremental forming‐rolling blank holder (TPIF‐RL) sheet‐forming method. The effects of the selected parameters are optimized using response surface methodology. As a result of the study, it is determined that the most important parameter for surface quality and wall thickness is the forming tool diameter, the most effective parameters for forming force are the forming tool diameter and increment size, and for spring‐back the dominant parameters are forming tool diameter, holding pressure, and increment size. The spring‐back angle increases with increasing forming tool diameter, holding pressure, and feed rate. In addition, both spring‐forward and spring‐back are observed in the formed parts.

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“…Bu çalışma kapsamındaki geri esneme ölçümleri daha önce yayımlanan "Investigation of formability of HC380LA material via the TPIF-RL incremental forming method" (https://doi.org/10.1080/03019233.2019.1711351) isimli çalışma [23] kapsamında elde edilen numuneler kullanılarak yapılmıştır. Daha önce yayımlanan çalışmada geri esneme ölçümleri çeşitli sebeplerden ötürü yapılamamış, bu çalışma kapsamında yapma imkânı bulunmuştur.…”

Section: Teşekkürunclassified

“…Experimental factors and levels[23].Şekillendirme sonrası parçalarda oluşan geri esneme açıları Şekil 3'te görülen Kreon ACE-6-20 CMM (Coordinate Measuring Machine) koordinat ölçüm cihazı ile 7-10 noktadan ölçüm yapılarak belirlenmiştir. Yapılan ölçümler Autodesk Powerinspect yazılımına alınarak CAD görüntü resmi oluşturulmuş ve ölçüm değerleri CAD dosyası üzerinden elde edilmiştir.…”

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Investigation of the springback behavior of Erdemir 7136 sheet formed by rolling blank holder incremental sheet forming method

Taşdemir¹,

Şen²,

Seçgin³

2021

Pamukkale J Eng Sci

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Artımlı şekillendirme yöntemi ile kalıp imalatına ihtiyaç duyulmadan hızlı ve düşük maliyetli prototip parça üretimi yapılabilmektedir. Ancak bu yöntemdeki en önemli sorunlardan bir tanesi üretilen parçaların geometrik doğruluğudur. Geometriksel hatanın en büyük kaynağı ise geri esneme olayıdır. Bu çalışmada, kayar baskı plakalı artımlı sac şekillendirme metodu kullanılarak 1 mm kalınlığındaki Erdemir 7136 sacı şekillendirilmiştir. Klemp sıkma (sacı tutma) basıncı, artım miktarı, form takım çapı ve ilerleme hızı parametrelerinin geri esnemeye olan etkileri araştırılmıştır. Araştırma neticesinde geri esneme açısının takım çapı arttıkça büyüdüğü, ilerleme hızı ve artım miktarının artması ile düştüğü tespit edilmiştir. Çalışma kapsamında optimum parametre değerleri 5.8776 bar klemp sıkma basıncı, 1500 mm/dk. ilerleme hızı, 0.75 mm artım miktarı ve 5 mm takım çapı olarak belirlenmiştir. Rapid and low-cost prototype parts can be produced without the need for mold production with incremental forming method. One of the most important problems in this method is the geometry accuracy of the products produced. The biggest source of the geometric error is the springback event. In this study, Erdemir 7136 sheet with a thickness of 1 mm was formed by using rolling blank holder incremental sheet forming method. The effects of holding pressure, increment, tool diameter and feedrate parameters on springback were investigated. As a result of the research, it was found that the springback angle increased with increasing of form tool diameter and decreased with increasing of feedrate and increment. The optimal conditions for springback are determined as 5.8776 bar holding pressure, 1500.0 mm/min feedrate, 0.75 mm increment and 5 mm tool diameter.

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Investigation of formability of HC380LA material via the TPIF-RL incremental forming method

Cited by 9 publications

References 21 publications

Optimization of Titanium Grade 2 sheet forming by roller blank holder method

Optimization of Titanium Grade 2 sheet forming by roller blank holder method

Optimization of Incremental Forming of Low‐Alloy High‐Yield‐Strength HC300LA Sheet Using a Rolling Blank Holder Method

Investigation of the springback behavior of Erdemir 7136 sheet formed by rolling blank holder incremental sheet forming method

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