Design and conceptualization of a cutting tool to investigate the influence of the shear cutting process on edge crack sensitivity

Feistle, Martin; Krinninger, Michael; Paetzold, I.; Stahl, Jens; Golle, Roland; Volk, Wolfram

doi:10.1088/1742-6596/896/1/012106

Cited by 6 publications

(3 citation statements)

References 6 publications

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“…The edge crack investigations were performed on two different shear cutting tools, which differ mainly in the cutting line geometry. The one for producing the Edge-Fracture-Tensile-Test (EFTT ) specimen according to [17] is shown in Figure 3 a) and described in detail in [19]. Based on the specimen geometry, both an open and closed cutting line can be realized in the tool.…”

Section: Shear Cutting Tools and Pressesmentioning

confidence: 99%

Blanking of Stainless Steel

Pätzold

Tröber

Welm

et al. 2022

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

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Slug pulling, adhesion formation and edge fracture are major challenges in the sheet metal processing industry. They lead to a strong reduction in part quality, process stability as well as profitability. In this study, investigations are carried out on stainless steel X5CrNi18-10 to address the previous mentioned challenges. While slug pulling and edge fracture strongly depend on the geometric characteristics of active elements as well as the selection of process parameters, adhesion formation is mainly determined by temperature and thermoelectric currents. In this publication, the influence of the die channel geometry on the slug pulling effect and the part quality is investigated. Furthermore, the temperature profile over the shear cutting process as well as the resulting thermoelectric currents are determined for the test material. The relationship between edge crack sensitivity, shear cutting parameters and strategies is examined. These investigations thus form the basis for an improved understanding of the shear cutting of stainless steel.

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Section: Shear Cutting Tools and Pressesmentioning

confidence: 99%

Blanking of Stainless Steel

Pätzold

Tröber

Welm

et al. 2022

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

Self Cite

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“…Since a fatigue crack typically appears on a shear-cut edge in automotive components, Paetzold et al [32] looked into the relationship between the shear-cutting process (die clearance and cutting edge radius) and the fatigue behaviour in cutting of DP800 high strength steel, where the result showed that the shearing technique used has a significant impact on fatigue resistance. Feistle et al [33] reported that different cutting parameters and strategies, including single and multi-stage shear cutting, open and closed cutting lines, die clearance, and cutting-edge geometry, have a significant effect on the edge crack sensitivity. Gläsner et al [34] created a novel two-stage shear-cutting technique (pre-cutting, trimming) that exhibits minimal dimensional tolerance and clean edges in order to minimize the sensitivity of edge cracks.…”

Section: Introductionmentioning

confidence: 99%

Effect of Inclined Angle in Trimming of Ultra-high Strength Steel Sheets Having Inclined and Curved Shapes

Leong,

Jaafar,

Tajul

et al. 2023

IJE

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Trimming the scrap portion of ultra-high strength steel (UHSS) components poses a significant challenge due to the inherent high strength and hardness characteristics of the material. For UHSS components with a higher geometric complexity such consisting of inclined and curved sections, sharp tilt, and small bend radius, the large trimming load results in poor sheared quality and shape defects, which commonly happen in these areas. This research investigated the effects of applying a small inclination angle to the punch in the trimming of the UHSS parts having an inclined and curved shape. The inclined punch was modified to four sets of different degrees of inclination i.e., 1°, 3°, 5°, and 10°. A comparative analysis of the trimming load, trimming energy, sheared edge quality and shape defects was conducted between these modified punches and the normal punch for their effectiveness in the trimming operation. Results showed that the application of inclination angle significantly decreased the trimming load, reduced the trimming energy, and improved the sheared edge surface quality, as well as prevented the shape defects at the inclined and curved zones as compared to the outcomes produced when trimming using the normal punch. The study suggested that the change to the punch geometry is an effective option to improve the performance of the process as well as the quality of the part, particularly in trimming the high-strength components having complex shapes.

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“…[3,7,8] Fig. 2: Selection of process parameters that are most likely to influence the cutting surface parameters The influence of these process parameters, lack of an accurate prediction of material separation and rigidity requirements from the process also complicate the design and dimensioning of the stamping tool [9,8]. Therefore, the tool designs are based on the empiric model in [10].…”

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confidence: 99%

Towards Data Driven Stamping Process Modelling by Optical Inline Monitoring of Cutting Surface Parameters

Lorenz

Menzl

Donhauser

et al. 2021

Preprint

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Stamping is a wide-spread production process, applied when massive amounts of the ever-same cheap parts are needed. For this reason, a highly efficient process is crucial. The cutting process is sensitive to a multitude of parameters. A process that is not correctly adjusted is subject to considerable wear and therefore not efficient. Unfortunately, the precise dependencies are often unknown. A prerequisite for optimal, reproducible and transparent process alignment is the knowledge of how exactly parameters influence the quality of a cutting part, which in turn requires a quantitative description of the quality of a part. A data driven approach allows to meet this challenge and quantify these influences. We developed an optical inline monitoring system, which consists of a image capturing, triangulation and image processing, that is capable of deriving quality metrics from 2D images and triangulation data of the cutting surface, directly inside the machine and without affecting the process. We identify features that can be automatically turned into quality metrics, like fraction of the burnish surface or the cut surface inclination. As an application, we show that the status of tool wear can be inferred by monitoring the burnish surface, with immediate consequences for predictive maintenance. Furthermore, we conclude that connecting machine and process parameters with quality metrics in real time for every single part enables data driven process modelling and ultimately the implementation of intelligent stamping machines.

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Design and conceptualization of a cutting tool to investigate the influence of the shear cutting process on edge crack sensitivity

Cited by 6 publications

References 6 publications

Blanking of Stainless Steel

Blanking of Stainless Steel

Effect of Inclined Angle in Trimming of Ultra-high Strength Steel Sheets Having Inclined and Curved Shapes

Towards Data Driven Stamping Process Modelling by Optical Inline Monitoring of Cutting Surface Parameters

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