Investigation of the required clamping force at multidirectional undercut-forging

verfasst von: Jonathan Ross, Jan Langner, Malte Stonis, Bernd Arno Behrens
Abstract: A hot forging process allows to produce parts of excellent quality and technical properties. Nevertheless, it is not possible to forge undercut geometries like piston pin bores, it is usually necessary to manufacture them in subsequent processes. Thus, an undercut-forging process was newly developed. Such a process requires a multidirectional forming tool, which is challenging due to a high clamping force of the tool during the process. With the research results, the requirements to the crucial tool components of heavy springs diminish, allowing using standard spring devices instead of large and expensive custom designed devices. The aim of this study is to analyze the clamping force, its origin, and influencing factors in order to facilitate the tool design. Therefore, in forming simulations the input parameters press velocity, initial temperature, and punch shape were investigated, and their effect on the clamping force was statistically evaluated. The press velocity has the major impact on the resulting clamping force. The initial part temperature and the shape of the punch tool showed minor but still significant effects. This combination of input parameters reduces the load and the stress on the tool, enabling to perform the process on smaller forging presses. Eventually, forging trials validated the results.
Externe Organisation(en): Institut für integrierte Produktion Hannover (IPH) gGmbH
Typ: Artikel
Journal: Production Engineering
Band: 12
Seiten: 501-515
Anzahl der Seiten: 15
ISSN: 0944-6524
Publikationsdatum: 27.04.2018
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Maschinenbau, Wirtschaftsingenieurwesen und Fertigungstechnik
Elektronische Version(en): https://doi.org/10.1007/s11740-018-0830-3 (Zugang: Geschlossen)

BibTeX

@article{9c022356284b471d8a9d488a0e83fa43,
title = "Investigation of the required clamping force at multidirectional undercut-forging",
abstract = "A hot forging process allows to produce parts of excellent quality and technical properties. Nevertheless, it is not possible to forge undercut geometries like piston pin bores, it is usually necessary to manufacture them in subsequent processes. Thus, an undercut-forging process was newly developed. Such a process requires a multidirectional forming tool, which is challenging due to a high clamping force of the tool during the process. With the research results, the requirements to the crucial tool components of heavy springs diminish, allowing using standard spring devices instead of large and expensive custom designed devices. The aim of this study is to analyze the clamping force, its origin, and influencing factors in order to facilitate the tool design. Therefore, in forming simulations the input parameters press velocity, initial temperature, and punch shape were investigated, and their effect on the clamping force was statistically evaluated. The press velocity has the major impact on the resulting clamping force. The initial part temperature and the shape of the punch tool showed minor but still significant effects. This combination of input parameters reduces the load and the stress on the tool, enabling to perform the process on smaller forging presses. Eventually, forging trials validated the results.",
keywords = "Clamping force, FEA, Forging, Multidirectional, Tool design, Undercut",
author = "Jonathan Ross and Jan Langner and Malte Stonis and Behrens, {Bernd Arno}",
note = "Funding information: ported by the IGF project 18162 N of the Forschungsvereinigung Stahlanwendung e.V. (FOSTA) through a resolution of the German Bundestag. The authors would like to thank the German Federation of Industrial Research Associations “Otto von Guericke” e.V. (AiF) for the financial and organisational support of this project.",
year = "2018",
month = apr,
day = "27",
doi = "10.1007/s11740-018-0830-3",
language = "English",
volume = "12",
pages = "501--515",
journal = "Production Engineering",
issn = "0944-6524",
publisher = "Springer Verlag",
number = "3-4",
}