Determining the Influence of Shear Cutting Parameters on the Edge Cracking Susceptibility of High-strength-steels Using the Edge-fracture-tensile-test

Feistle, Martin; Golle, Roland; Volk, Wolfram

doi:10.1016/j.procir.2016.01.007

Cited by 22 publications

(6 citation statements)

References 6 publications

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“…Thinning rate Angle α Evaluated cricital thinning (IFU) Evaluated critical thinning [6] Edge-Fracture-Tensile-Test Reference Test HR660Y760T-CP…”

Section: Methodsmentioning

confidence: 99%

“…To generate an experimental dataset, demonstrating repeatability (intra-institution) and reproducibility (inter-institutions), various institutions took part in performing the same experiments. The special type of specimen for the edge-fracture-tensile-tests was proposed by the Chair of Metal Forming and Casting (UTG) of the Technical University of Munich [6], and these specimens are cut also by UTG for the mentioned VDA-Project using the introduced punching tool setup. In addition, the time-force-strain measurements recorded by all project partners are evaluated for the localized instability (φ 1,Inst ) by UTG using a script based on the method developed collaboratively by Volk and Hora [1] and probably further developed at UTG (see Figure 1).…”

Section: Introductionmentioning

confidence: 99%

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An alternative time-based strategy for the evaluation of forming limits using optical experimental measurements

Karadoğan

Görz

Liewald

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Optical measuring systems allow to observe the sheet metal instability more precisely. The section method was first standardised and made available in commercial measurement systems in order to evaluate the forming limit curves almost automatically. The insignificant contribution of the necking area to the evaluated critical strains compared to the neighbouring volume of material led to alternative approaches such as the time-based evaluation criteria. The majority of these criteria take into account the strain evolution at the material necking location and are also suitable for evaluating other types of limits such as edge-crack sensitivity. Some advanced high-strength steels typically exhibit very short deformation after the onset of instability, which complicates the application of time-based approaches because they require sufficient amount of deformation after necking. The proposed approach is an attempt to reduce the dependence of the time-based approaches on the amount of deformation after necking by taking into account the local characteristics of the measurement curves. The approach is applied to some advanced high-strength steels to evaluate the forming instability and edge-crack sensitivity. The superiority of this identification approach is demonstrated in this paper by comparison with classical time-based approaches.

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“…Thinning rate Angle α Evaluated cricital thinning (IFU) Evaluated critical thinning [6] Edge-Fracture-Tensile-Test Reference Test HR660Y760T-CP…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An alternative time-based strategy for the evaluation of forming limits using optical experimental measurements

Karadoğan

Görz

Liewald

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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“…al. [19] developed methods to measure the formation of edge cracks on shearing blades. It has been found that the forming strength of high strength steels is curtailed due to edge fractures and can be improved by varying process parameters like die clearance, geometry and cutting line.…”

Section: International Journal Of Engineering Research and Technology (Ijert)mentioning

confidence: 99%

Design and Fabrication of Pneumatic Sheet Metal Cutting and Punching Machine

Pratihar¹

2020

IJERT

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Metal in the form of sheets is paramount in the manufacturing industry. Its applications are countless. But metal in the form of sheets cannot be directly used, operations like cutting, punching, blanking, bending, trimming, etc. are needed to be carried out on the metal sheets in order to fully utilize them. For these operations, most large scale manufacturing industries use hydraulically operated machines. But since hydraulic machines are not cost-effective, most small and medium scale industries use hand-operated machines for carrying out sheet metal operation. The problem with hand-operated machines is that they are slow and cannot be automated. This is where the concept of pneumatics will prove itself advantageous. We are developing a pneumatically operated cutting and punching machine which will use the help of compressed air to drive a shearing blade and punch to carry out the operations on a metallic sheet. The machine is designed to cut 1mm thick aluminium sheets and 0.5mm thick copper sheets very easily. The main components of developed pneumatic system are compressor, pipelines, double-acting cylinder, an actuator, and flow control valves. This machine will thus, prove itself cost-effective and also save a lot of time in manufacturing process as two operations can be performed on the same platform.

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“…Owing to these special mechanical properties, however, they prevented many conventional sheet metal forming processes from being suitably applied for high-strength steel sheet to fabricate the automotive part. For example, in terms of blanking process, many researches illustrated that the recommended blanking clearance commonly applied for conventional steel sheet is not suitable for applying in blanking process of high-strength steel sheet [1,2]. It is also suggested that the suitable blanking clearance applied for high-strength steel sheet should be larger, and it was recommended of approximately 10-20% thickness [2].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, most of them were performed on forming process such as bending, flanging, and deep drawing processes [3,5,6]. There are a few researches carried out on precision shearing and blanking processes [1,5,7]. For these reasons, in the present study, the shaving process which is one of the precision sheet metal die cutting processes and which could produce the smooth cut surface overall material thickness was investigated by the experiments to examine the feasibility of this process applied for high-strength steel sheets.…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of the Feasibility of Shaving Process Applied for High-Strength Steel Sheets

Phanitwong

Sontamino

Thipprakmas

2016

Advances in Materials Science and Engineering

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In recent years, the engineered materials were developed to improve their mechanical properties. A high-strength steel sheet is one of them, developed to serve the requirement of reducing weight of vehicles. Therefore, as a new material, many researches have been carried out to examine the use of sheet metal forming process applied for high-strength steel sheet. However, the feasibility of shaving process applied for it has not been investigated yet. In the present study, this feasibility was revealed by using experiments on two types of high-strength steel sheets: SAPH 440 and SPFH 590Y (JIS). The relationship between shaved surface feature and shearing clearance of high-strength steel sheets corresponded well with those of their conventional metal sheets. However, due to the high ultimate strength of these materials, it was revealed in this present study that there were not any suitable conditions of shaving process that could be applied to achieve the requirements of smooth cut surface overall material thickness.

show abstract

Determining the Influence of Shear Cutting Parameters on the Edge Cracking Susceptibility of High-strength-steels Using the Edge-fracture-tensile-test

Cited by 22 publications

References 6 publications

An alternative time-based strategy for the evaluation of forming limits using optical experimental measurements

An alternative time-based strategy for the evaluation of forming limits using optical experimental measurements

Design and Fabrication of Pneumatic Sheet Metal Cutting and Punching Machine

Experimental Analysis of the Feasibility of Shaving Process Applied for High-Strength Steel Sheets

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