A Review of Fine Blanking: Influence of Die Design and Process Parameters on Edge Quality

Aravind, Usha K.; Chakkingal, Uday; Venugopal, P.

doi:10.1007/s11665-020-05339-y

Cited by 27 publications

(14 citation statements)

References 101 publications

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“…All 0.X samples exhibit a strong decrease in surface hardness (100-150HV) at the rolled surface (edge 1 and edge 2) to a depth of 0.5-0.7mm. On the other hand, only a minor hardness decrease is observed along the cutting edge (edge 3), where the original rolled surface was removed by fine blanking [10] before Q&T. The type of heat treatment has only limitedly affected the decrease in surface hardness. All 0.X samples are non-compliant even if the component has been Q&T twice (Fig.…”

Section: Resultsmentioning

confidence: 99%

Failure Analysis of Boron Steel Components for Automotive Applications

Boniardi

Casaroli

Sirangelo

et al. 2023

Frattura Ed Integrità Strutturale

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The automotive industry is continuously looking for an innovative mix of new steels and manufacturing techniques in order to improve process chain efficiency and cost reduction. To this aim, boron steels are becoming increasingly popular thanks to their high hardenability and machinability. Due to their reduced finishing steps, boron steels are commonly processed using fine blanking technologies. The success of fine blanking on boron steel components is due to heat treatments which must be carefully designed to avoid precipitation of boron-rich compounds that would lower steel hardenability. At high temperature, boron is very reactive with oxygen and nitrogen. The main focus of this paper is to show some drawbacks that can occur during heat treatments of automotive components. An experimental campaign was performed on two different boron steels, namely EN 34MnB5 and EN 22MnB5. The steel samples were previously spheroidized annealed in a neutral environment (hydrogen/nitrogen atmosphere), and then fine blanked to obtain specific automotive components which were subsequently quenched and tempered. Experimental tests revealed precipitation of nanometric compounds, causing strong grain refinement and localized decrease of steel hardenability. Hardenability problems were brought back to nitrogen pick-up during initial spheroidize annealing treatments.

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Section: Resultsmentioning

confidence: 99%

Failure Analysis of Boron Steel Components for Automotive Applications

Boniardi

Casaroli

Sirangelo

et al. 2023

Frattura Ed Integrità Strutturale

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“…Fine blanking is a sheet metal shearing process. Compared to conventional blanking, fine blanking is characterized by a high geometric accuracy and a smooth shearing surface with only small tear-off (Aravind et al 2021;Bergs et al 2020). Fine blanking is used in mass productions of parts, e.g., for the automotive or aerospace industry (Pennekamp et al 2019).…”

Section: Fine Blankingmentioning

confidence: 99%

Materials in the Drive Chain – Modeling Materials for the Internet of Production

Rajaei

Becker

Deng

et al. 2023

Interdisciplinary Excellence Accelerator Series

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In this chapter, the focus lies on a predictive description of the material response to the thermomechanical loads within different process steps by means of physical and data-driven models. The modeling approaches are demonstrated in examples of innovative production technologies for components of a drive chain: Fine blanking of parts; powder metallurgical (PM) production of gears; open-die forging and machining of drive shafts. In fine blanking, material, process, and quality data are acquired to model interactions between process and material with data-driven methods. Interpretable machine learning is utilized to non-destructively characterize the initial material state, enabling an optimization of process parameters for a given material state in the long-term. The PM process chain of the gear includes sintering, pressing, surface densification, case hardening, and finishing by grinding. Several modeling and characterization approaches are applied to quantitatively describe the microstructure evolutions in terms of porosity during sintering, density profile after cold rolling, hardness and residual stresses after heat treating and grinding and the tooth root load bearing capacity. In the example of the open-die forging, a knowledge-based approach is developed to support the decision-making process regarding the choice of the proper material and optimized pass schedules. Considering the microstructure of the forged shaft, the elastoplastic material behavior is described by a dislocation-based, multiscale modeling approach. On this basis, process simulations could be carried out to predict the process forces, chip form, residual stresses, and the tool life among other output data.

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“…But the rollover height and width have a drastic variation due to the lagrer blanking clearance provides a better space for material flow. Burr is a problem that can not be avoided [23]. But for microparts, smaller burr may be difficult that to be polished clean.…”

Section: Fillet Radiusmentioning

confidence: 99%

Die design for fine micro-blanking process

Liu

Zhang

et al. 2022

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

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As the increase in demand for microparts of metal foil, the micro-blanking process with many advantages of plastic deformation has been widely applied on microparts manufacturing area. But the fracture zone of shearing surface is always present and affects the service life of the part. This paper proposes a new micro-blanking die based on fine blanking technology. In this die, the rubber as the power transmission device is selected to provide a blank holder force and counter force. In the FEM simulation, the influence of a few key die parameters is considered such as punching clearance and fillet radius of female die and punch. And the fine micro-blanking experiments for superalloy foils were conducted to evaluate the feasibility of the die designs. The results had shown the fine micro-blanking die proposed was able to be used for micro-blanking and obtain metal microparts.

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A Review of Fine Blanking: Influence of Die Design and Process Parameters on Edge Quality

Cited by 27 publications

References 101 publications

Failure Analysis of Boron Steel Components for Automotive Applications

Failure Analysis of Boron Steel Components for Automotive Applications

Materials in the Drive Chain – Modeling Materials for the Internet of Production

Die design for fine micro-blanking process

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