Control of geometry deviation by stiffness variation in polymer deep drawing tools

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Authors

Due to the fact that the automotive industry is increasing the amount of vaiants of cars, the produced parts become more and more less. As a result, the same types of produced parts decrease and therefore the use of tools with a lifetime of nearly 10,000 parts gets a higher attractiveness. For forming operations with a low production volume or even for the design or try out process, deep drawing tools made out of polymers can be used. To enhance the wear behaviour of the tools, it is possible to protect the polymer by a hard metal coating. One of the main advantages of the polymer material in such a tool is the possibility to change or influence the stiffness. By varying the stiffness, the material flow can be controlled. This is useful to influence the geometry deviation and the springback behaviour of deep drawn parts. The use of an elastic tool leads to a broad process wmdow for the forming operation. In the presented research results the possibility of the influence of stuffiness variation in polymer tool is investigated for two forming processes of DP 600 high strength steel. A comparison of the forming behaviour with polymer die and steel die is operated in these investigations. In the polymer die, the stiflhess could be varied by the use of metallic springs and electrical linear actuators. Thereby the stiffness was controlled temporally and locally. The observed results show, that with the use of such functional elements the springback and the geometry deviation could be reduced successfully.
Translated title of the contributionSteuerung der Rückfederung durch Nutzung von Funktionselementen innerhalb eines Tiefziehwerkzeuges aus Kunststoff
Original languageEnglish
Title of host publicationNew Developments in Sheet Metal Forming Technology
EditorsMathias Liewald
Number of pages8
PublisherMAT-INFO Werkstoff-Informationsgesellschaft mbH
Publication date2014
Pages291-298
ISBN (print)978-3-88355-400-6
Publication statusPublished - 2014
Externally publishedYes
EventInternational Conference on "New Developments in Sheet Metal Forming": Effizient formen - Fellbach, Stuttgart, Germany
Duration: 13.05.201414.05.2014
https://www.dynamore.de/de/news/veranstaltungen/2014/forming2014

    Research areas

  • Engineering - Kunstoff, Werkzeugwerkstoff, Polymer, Rückfederung, Hartmetall, Werkzeugstahl, hochfester Stahl, Prototypentwicklung, Steifigkeit, Umformen, Lebensdauer, Automobilindustrie, Verschleißschutzschicht, Linearaktuator, Ziehteil, Funktionsglied, Matrizenwerkstoff, Umformverhalten, Steifigkeitsanpassung, Tiefziehwerkzeug, Funktionselement, stiffness variation, steel die

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