Improved Process Efficiency with Microtextured Blanking Punches Using MHP

Abstract:

To reduce emissions in the mobility sector, demand for high-strength and higher-strength steels in the automotive sector is constantly increasing, and with it the demands on the tools of the sheet metal processing industry. One important phenomenon is rapid wear which reduces the service life of blanking tools. Compensating with an increased use of lubricants is not advisable from an ecological point of view. It could be shown in literature that through texturing the lateral surfaces of blanking tools their wear behavior can be improved. In this work, machine hammer peening (MHP) was used to texture the surfaces. Compared to other deterministic texturing methods such as laser texturing, MHP has several beneficial effects. No additional surface finish is required after texturing and the surface structure is not weakened by the thermal influence. MHP machining simultaneously induces residual compressive stresses close to the surface, work-hardens the edge zone and smoothes roughness peaks. Combined with deterministic texturing in the same process step, the tribological behavior of the tool surface can be significantly improved. Based on the tribological investigations of the authors in the strip drawing test on different structuring strategies, the findings from the model test are to be transferred to the real test in this work. For this purpose, rotationally symmetrical blanking punches were textured using a specially developed texturing center. The machine hammer peening center allows surface texturing with positioning accuracies of less than 2% by controlling a rotary and feed axis in combination with frequency control of the machine hammer peening set up. A hammer head with micro-milled micro-tip was used as the texturing tool for the MHP. Different degrees of coverage with the same aspect ratio were applied to the surface. These punches were then tested on various materials on an industrial high-speed stamping press. To evaluate the effectiveness, the force curves for different blanking frequencies were analyzed and the evolution of the textured topography was continuously evaluated. The experiments reveal that the withdraw force could be reduced by 38% due to the micro texturing with a coverage of 18%. Other coverages led to an increase. By texturing the lateral surfaces of blanking punches using MHP the service life could also be significantly improved.

• Periodical: Defect and Diffusion Forum (Volume 441)
• Pages: 19-27
• DOI: https://doi.org/10.4028/p-5ryJnY
• Online since: March 2025
• Authors: Philipp Schumann*, Viktor Arne, Peter Groche
• Keywords: Blanking, Machine Hammer Peening, Micro Texturing, Wear

References

[1] Size, D. I. M., & Growth, D. I. M. S., Share & Trends Analysis Report By Product (Titanium Implants, Zirconium Implants), By Region (North America, Europe, Asia Pacific, Latin America, MEA) …: Personalized Medicine Market Analysis By Product And Segment Forecasts To 2022 (2018), 2018.

[2] J. Cao and M. Banu, "Opportunities and challenges in metal forming for lightweighting: review and future work," Journal of Manufacturing Science and Engineering, vol. 142, no. 11, p.110813, 2020.

DOI: 10.1115/1.4047732

[3] K.-D. Bouzakis et al., "Effect of the cutting edge radius and its manufacturing procedure, on the milling performance of PVD coated cemented carbide inserts," CIRP Annals, vol. 51, no. 1, p.61–64, 2002.

DOI: 10.1016/s0007-8506(07)61466-8

[4] T. Trzepieciński, "Recent developments and trends in sheet metal forming," Metals, vol. 10, no. 6, p.779, 2020.

DOI: 10.3390/met10060779

[5] M. Sigvant et al., "Friction in sheet metal forming: Influence of surface roughness and strain rate on sheet metal forming simulation results," Procedia Manufacturing, vol. 29, p.512–519, 2019.

DOI: 10.1016/j.promfg.2019.02.169

[6] W. Colglazier, "Sustainable development agenda: 2030," Science (New York, N.Y.), vol. 349, no. 6252, p.1048–1050, 2015.

DOI: 10.1126/science.aad2333

[7] N. Bay et al., "Environmentally benign tribo-systems for metal forming," CIRP Annals, vol. 59, no. 2, p.760–780, 2010.

DOI: 10.1016/j.cirp.2010.05.007

[8] Regulation (EC) No 1907/2006 of the European Parliament and of the Council of 18 December 2006 concerning the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH), establishing a European Chemicals Agency: 2006. [Online]. Available: https://​eur-lex.europa.eu​/​legal-​content/​EN/​TXT/​?​uri=​CELEX%3A02006R1907-20230629

DOI: 10.1016/j.fos.2016.03.026

[9] D. Patel, V. K. Jain, and J. Ramkumar, "Micro texturing on metallic surfaces: State of the art," Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, vol. 232, no. 6, p.941–964, 2018.

DOI: 10.1177/0954405416661583

[10] F. Saeidi, M. Parlinska-Wojtan, P. Hoffmann, and K. Wasmer, "Effects of laser surface texturing on the wear and failure mechanism of grey cast iron reciprocating against steel under starved lubrication conditions," Wear, vol. 386, p.29–38, 2017.

DOI: 10.1016/j.wear.2017.05.015

[11] Shimizu, Kobayashi, Vorholt, and Yang, "Lubrication Analysis of Micro-Dimple Textured Die Surface by Direct Observation of Contact Interface in Sheet Metal Forming," Metals, vol. 9, no. 9, p.917, 2019.

DOI: 10.3390/met9090917

[12] K. Kitamura, T. Makino, M. Nawa, and S. Miyata, "Tribological effects of punch with micro-dimples in blanking under high hydrostatic pressure," CIRP Annals, vol. 65, no. 1, p.249–252, 2016.

DOI: 10.1016/j.cirp.2016.04.133

[13] C. Lechner, F. Bleicher, C. Habersohn, C. Bauer, and S. Goessinger, "The use of machine hammer peening technology for smoothening and structuring of surfaces," in Annals of DAAAM for 2012 & Proceeding of the 23rd International DAAAM Symposium, p.331–337.

DOI: 10.2507/23rd.daaam.proceedings.077

[14] J. R. Hönnige, P. Colegrove, and S. Williams, "Improvement of microstructure and mechanical properties in wire+ arc additively manufactured Ti-6Al-4V with machine hammer peening," Procedia Engineering, vol. 216, p.8–17, 2017.

DOI: 10.1016/j.proeng.2018.02.083

[15] B. Adjassoho, E. Kozeschnik, C. Lechner, F. Bleicher, S. Goessinger, and C. Bauer, "Induction of residual stresses and increase of surface hardness by machine hammer peening technology," Annals of DAAAM, vol. 23, no. 1, p.697–702, 2012.

DOI: 10.2507/23rd.daaam.proceedings.163

[16] M. Steitz, P. Stein, and P. Groche, "Influence of Hammer-Peened Surface Textures on Friction Behavior," Tribol Lett, vol. 58, no. 2, 2015.

DOI: 10.1007/s11249-015-0502-9

[17] P. Sticht, J. Hohmann, and P. Groche, "Effects of Machine Hammer Peened Surface Textures on the Tribological Behavior of Stamping Tools," in 2020, p.108–120. [Online]. Available: https://​link.springer.com​/​chapter/​10.1007/​978-​981-​15-​0054-​1_​12

DOI: 10.1007/978-981-15-0054-1_12

[18] P. Schumann, P. Groche, and R. Lindner, "Influence of different determinsistic surface texturing processes on friction and tool life for load collectives in sheet metal forming," Proceedings of the SICT / Plasma Tech / Tribology 2023 International Joint Conferences 2023, 2023, pp.42-47

[19] Y. Uehara, M. Wakuda, Y. Yamauchi, S. Kanzaki, and S. Sakaguchi, "Tribological properties of dimpled silicon nitride under oil lubrication," Journal of the European Ceramic society, vol. 24, no. 2, p.369–373, 2004.

DOI: 10.1016/s0955-2219(03)00220-6

[20] P. Schumann, D. Martin, C. Kubik, and T. Schneider, "Analysis and Evaluation of the Clamping Force on the Tool Surface During the Blanking Process," NUMISHEET 2022: Proceedings of the 12th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes, 2022.

DOI: 10.1007/978-3-031-06212-4_60

[21] P. Schumann and P. Groche, "Ressourceneffiziente Prozesse durch modifizierte Werkzeugoberflächen: Mittels Mikrostrukturierung durch maschinelles Oberflächenhämmern zur nachhaltigen Produktion," Zeitschrift für wirtschaftlichen Fabrikbetrieb, vol. 119, 1-2, p.75–79, 2024.

DOI: 10.1515/zwf-2024-1021

[22] J. Hohmann, T. Schatz, and P. Groche, "Intelligent wear identification based on sensory inline information for a stamping process," in Proceedings of 5th International Conference on Advanced Manufacturing Engineering and Technologies: NEWTECH 2017 5, p.285–295.

DOI: 10.1007/978-3-319-56430-2_21