Abstract
Cross wedge rolling is a forming technology that offers a lot of advantages: No flash occurs, cycle times are low, lubricants are not necessary and the machines are easy to automate. Currently, cross wedge rolling is applied at hot temperatures only. An adaption of this technology to warm temperatures (about 500–950 °C) can increase the geometrical spectrum of warm forgings. The advantages of warm forged parts in comparison to hot forged parts are closer tolerances, reduced surface roughness, no scale and reduced decarburization. To apply cross wedge rolling at warm temperatures, the possibilities of defects e. g. internal voids and improper formed work pieces must be analysed. This paper describes the development of a warm cross wedge rolling process with one area reduction. The paper also includes results of finite element analysis (FEA), experimental trials with a downsized work piece and the adaption to the industrial work piece in original size. In the FEA simulations tools with serrations on the side have been used. The downsizing method is explained and the difference between FEA, downsized and originally sized work piece with the focus on forming forces, temperature distribution and defects are presented.
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References
Müller S, Lau P, Nickel R (2008) Influence of the process parameters on the multi-directional forging operation of a two cylinder crankshaft. In: TMS 2008 137th annual meeting and exhibition: proceedings of the ninth global innovations symposium, 9–13 March 2008, New Orleans, LA, USA, pp 121–127
N N (1998) Kaltmassivumformen von Stählen—Anwendung, Arbeitsbeispiele, Wirtschaftlichkeitsbetrachtungen für das Kaltfließpressen. In: VDI-Richtlinie 3138, VDI-Gesellschaft Produktionstechnik, Düsseldorf, Germany
International Cold Forging Group (2001) ICFG Document, No. 12/01, Erlangen, Germany
Geiger M, Neugebauer R (2003) Process basics of warm forging for shaft-shaped parts (Prozessgrundlagen für die Halbwarmumformung wellenförmiger Teile mit weit auskragenden Formelementen). Studiengesellschaft Stahlanwendung, Report P 452, Düsseldorf, Germany
Hustedt P, Kohlstette J (2003) Warm precision forging of long part (Präzisionsschmieden von Langteilen—jetzt auch im Halbwarmbereich). Schmiedejournal 3:24–26
Behrens B-A, Suchmann P, Schott A (2008) Warm forging: new forming sequence for the manufacturing of long flat parts. In: Production engineering, Springer Verlag, Berlin, 2–3, pp 261–268
Li Q, Lovell M (2008) Cross wedge rolling failure mechanisms and industrial application. Int J Adv Manuf Technol 37(3–4):265–278
Pater Z (2003) Tools optimization in cross wedge rolling. J Mater Process Technol 139(1–3):153–159
Herbertz R, Hermanns H (1997) Querkeilwalzen. Ein wirtschaftliches und flexibles Vorformverfahren für die Großserienfertigung. Schmiede-Journal, Industrieverband Massivumformung e 2:20–21
Wang B (2006) Roller type wedge cross-rolling process of shaping eccentric stepped shaft, Patent: CN000001810407A, WANG BAOYU HU
Johnson W, Mamalis AG (1977) A survey of some physical defects arising in metal working processes. In: 17th international MTDR conference, IFC, Ltd., eds., London, pp 607–621
Li Q et al (2002) Investigation of the morphology of internal defects in cross wedge rolling. J Mater Process Technol, no. 125–126:248–257
Lange K (1988) Umformtechnik Band 2: Massivumformung. Springer-Verlag, Berlin u.a
Xiong Y et al (2006) Effect of warm cross-wedge rolling on microstructure and mechanical property of high carbon steel rods. Mater Sci Eng A 431:152–157
Spies K (1959) Die-preforming and production using rolling (Die Zwischenformen beim Gesenkschmieden und ihre Herstellung durch Formwalzen). Westdeutscher Verlag, Köln, Germany
Taca M, Vasile E, Alexandrescu E (2011) Influence of forging temperature on the mechanical properties of micro alloyed steels. In: The eighth international congress in materials science and engineering Iasi, Romania, 6–29 May 2011
Acknowledgments
The authors thank the European Commission for the funding of this project (project number: 221967) within the 7th Framework Programme (Research for the Benefits of SMEs; Call identifier: FP7-SME-2007-1).
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Kache, H., Stonis, M. & Behrens, BA. Development of a warm cross wedge rolling process using FEA and downsized experimental trials. Prod. Eng. Res. Devel. 6, 339–348 (2012). https://doi.org/10.1007/s11740-012-0379-5
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DOI: https://doi.org/10.1007/s11740-012-0379-5