Investigation on wear-induced edge passivation of fine-blanking punch

Zheng, Qide; Zhuang, Xincun; Gao, Zhisheng; Guan, Mingwen; Ding, Zhao; Hong, Yongfang; Zhao, Zhen

doi:10.1007/s00170-019-04140-z

Cited by 8 publications

(6 citation statements)

References 20 publications

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“…Prior publications indicates a suitable clearance for HSIC between 2 to 4 % of the sheet thickness [8]. This clearance is significantly higher compared to fine blanking (∼ 0.5 %), but lower compared to conventional blanking (5 -15 %) [18]. For the sheet thickness of 1.8 mm, cutting energies of 1.7, 2.5 and 3.5 kJ were performed.…”

Section: High Speed Impact Cutting Experimentsmentioning

confidence: 99%

High speed impact cutting (HSIC) of advanced high strength steel 42SiCr under exploitation of adiabatic shear bands

Birnbaum,

Kunke,

Kräusel

2024

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

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Shear Cutting of Advanced High-Strength Steels poses technological challenges due to the substantial mechanical loads imposed on cutting tools, leading to elevated wear rates. A strategy for cutting high-strength materials involves the utilization of high-speed impact cutting (HSIC), wherein component separation occurs along a locally adiabatically heated shear band, resulting in reduced cutting forces. The steel alloy 42SiCr undergoes heat treatments involving Quenching+Tempering (Q+T) as well as Quenching+Partitioning (Q+P) for two sheet thicknesses. This results in the formation of martensitic microstructures with varying retained austenite content, as determined through X-ray Diffraction (XRD). Subsequently, the heat-treated steel samples are subjected to tensile testing for mechanical property evaluation, revealing ultimate tensile strengths exceeding 1500 MPa and fracture elongations ranging from 2 % to 12 %. Following this, the material is subjected to HSIC using the AdiaPress Adia 7 machine, employing predefined cutting energies. It is observed that both Q+T and Q+P-treated materials can be successfully cut using HSIC, although distinct cutting edge morphologies are evident. Optical examinations of the cut edges, conducted through top-view and cross-sectional analysis using Scanning Electron Microscopy and 3D laser scanning microscopy, confirm the presence of adiabatic shear bands and discrete zones.

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Section: High Speed Impact Cutting Experimentsmentioning

confidence: 99%

High speed impact cutting (HSIC) of advanced high strength steel 42SiCr under exploitation of adiabatic shear bands

Birnbaum,

Kunke,

Kräusel

2024

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

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“…The burnished surface obtained from this approach can nearly achieve the complete thickness of the blank in one operation, suggesting that the fracture zone can be nearly eliminated [20]. Zheng et al (2019) were investegated on wear-induced edge passivation of fine-blanking punch. They shows that reducing the length of straight lines and radius of arcs results in a large relative sliding distance of material at the punch edge [21].…”

Section: Introductionmentioning

confidence: 97%

“…Zheng et al (2019) were investegated on wear-induced edge passivation of fine-blanking punch. They shows that reducing the length of straight lines and radius of arcs results in a large relative sliding distance of material at the punch edge [21].…”

Section: Introductionmentioning

confidence: 99%

Finite element simulation and experimental investigation of the effect of clearance on the forming quality in the fine blanking process

et al. 2020

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The general concept of blanking seems a simple one but governing parameters are many and have a complex relationship , which directly affect the quality of the produced parts. These parameters are assessed using three main criterions: the burr amount, the appearance of the cut edge and dimensional accuracy. However, the optimization of these parts produced depends on full understanding of the fine blanking process. The aim of our work is to develop the numerical computations in order to investigated the influence of selected parameter of the cutting process on the stress state of cold-rolled steel sheets being cut. The material testing and the characterization are carried out in order to fit the constitutive model parameters to the experimental data and to establish the sheet metal constitutive law. The identified model is, then, used for numerical simulations which are performed using LsDyna/Explicit software of various blanking tests. During of numerical simulations of the fine blanking process was observed elongation in shear surface and simultaneous reduction in fracture zone versus clearance punch/die and also that punch is be considered deformable or not. The numerical results of the validation simulations were in agreement with the experimental data. Response to Reviewers: Response to Editor and Reviewer Comments: Ref. No.: MITE-D-20-00578 Title: Finite element simulation and experimental investigation of the effect of clearance on the forming quality in the fine blanking process We greatly appreciate the work of the editor and reviewer in evaluating this manuscript. All remarks and comments from the reviewer have been considered in the revised version of the manuscript.

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“…Under severe shearing conditions, the abrasive wear of the blanking punch became an issue [6]. When fine blanking ductile materials such as austenitic stainless steels or titanium alloys, the fine-blanking punch often suffered from adhesive wear, where the fresh work fragments and their oxide debris particles adhered onto the punch surfaces [7]. The punch and die were easily damaged when fine blanking difficult-to-form work materials without pretreatment.…”

Section: Introductionmentioning

confidence: 99%

Fine Blanking of Austenitic Stainless Steel Gears Using Carbon-Supersaturated High-Speed Steel Tools

Aizawa,

Fuchiwaki

2023

Machines

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Austenitic stainless steel gears were fabricated via the fine blanking process that can be used for mass production. A carbon-supersaturated (CS)-matrix high-speed steel punch was prepared to minimize the adhesive and abrasive wear damage. Its edge profile was tailored and finished to control the local metal flow around the punch edges and edge corners. This CS punch was utilized in fine blanking the AISI304 austenitic stainless steel gears. Ball-on-disc (BOD) testing was first employed to describe the frictional behavior of the CS tool steel disc against the AISI304 stainless steel balls. SEM-EDX analysis on the wear track revealed that a free-carbon tribofilm was formed in situ in the wear track to prevent adhesive wear via galling on the tool steel disc. No significant adhesive or abrasive wear was detected on the punch edges and punch edge corners after continuously fine blanking with 50 strokes. AISI304 gears were produced to have fully burnished surfaces. Their pitches, widths and circles were measured to evaluate their gear-grade balancing during the fine blanking process. The stabilized gear-grade balancing in JIS-9 to JIS-10 grades was attained for these as-blanked AISI304 gears without finishing processes.

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Investigation on wear-induced edge passivation of fine-blanking punch

Cited by 8 publications

References 20 publications

High speed impact cutting (HSIC) of advanced high strength steel 42SiCr under exploitation of adiabatic shear bands

High speed impact cutting (HSIC) of advanced high strength steel 42SiCr under exploitation of adiabatic shear bands

Finite element simulation and experimental investigation of the effect of clearance on the forming quality in the fine blanking process

Fine Blanking of Austenitic Stainless Steel Gears Using Carbon-Supersaturated High-Speed Steel Tools

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