Veränderung der Federdrahtparameter im Federherstellprozess. - In: Kaltgeformte Federn, (2008), insges. 15 S.
Grundlagen der Lebensdauerberechnung. - In: Kaltgeformte Federn, (2008), insges. 28 S.
Optimization of strength and forming behavior of SiCr-alloyed oil-hardened spring steel wire. - In: Wire journal international, ISSN 0277-4275, Bd. 41 (2008), 5, S. 95-101
Improving the control of the quenching and tempering process parameters can enable manufacturers to use a higher line speed in the tempering stage and save energy costs by use of lower austenizing temperatures.
Important wire parameters for producing highly loaded helical springs. - In: Wire forming technology international, Bd. 11 (2008), 3, S. 36-39
As specifications become ever more sophisticated, there is a need to improve the precision of helical compression springs. Therefore it is important to know which wire parameter(s) (material properties) matter for manufacturing and using helical springs and how can you measure them.
Federn-Vielfalt : die Vorgehensweise bei der Auswahl von Metallfedern. - In: Konstruktionspraxis, ISSN 0937-4167, Bd. 19 (2008), 3, S. 34-37
Federn werden als Maschinenelemente in allen Bereichen der Technik zur Erfüllung unterschiedlichster Aufgaben eingesetzt. Hauptsächlich angewendet werden Metallfedern, die im Wesentlichen aus Halbzeugen, wie Draht-, Band- und Stabmaterial hergestellt werden. Ihre Gestalten sind ebenso vielfältig wie ihre Einsatzmöglichkeiten.
150 Jahre Konstruktion und Berechnung von Metallfedern in Deutschland. - In: VDI-Z integrierte Produktion, ISSN 0042-1766, Bd. 150 (2008), 7/8, S. 12-14
Ermittlung von Federdrahtkennwerten. - In: Draht, ISSN 0012-5911, Bd. 59 (2008), 2, S. 72-77, insges. 4 S.
Optimization of strength and forming behavior of SiCr-alloyed oil hardened spring steel wire. - In: International Wire & Cable Conference, Bologna, Italy, November 2007, (2007), S. 1-13
The need to improve the precision of helical compression springs involves evaluating and optimizing the entire production process of the raw material (spring steel wire), with regard to strength and forming behavior. In the case of oil-hardened and tempered spring steel wire, improving the adjustment of the different quenching and tempering process parameters will help meet the need. This paper describes a systematic investigation and the results achieved, as well as the properties of helical compression springs produced with various types of hardened and tempered spring steel wire.
State of the art methodologies for numerical spring design. - 3 S. = 471,2 KB, TextPubl. entstand im Rahmen der Veranst.: Proceedings of Advanced Spring Technology - JSSE 60th Anniversary International Symposium, 2nd November 2007 at Fukiage Hall, Nagoya, Japan, S. 63-65
Springs have a complex geometry. In operation, large elastic deformations occur. Contacts within the spring, e.g. contacts of coils, and contacts to bordering components have to be taken into account. They all lead to great nonlinearities. Further difficulties are caused by spring natural oscillations in dynamic operations such as higher stress levels, friction, noises as well as lateral movements. The experimental analysis of springs is time-consuming. Therefore numerical simulation programs have been used more and more often. These programs are only usable by calculation engineers, specialy trained in the utilized numeric method and in spring technology. Therefore, with the FEM-spring-processor (FEM=Finite-Element-Method) and the MBS-spring-processor (MBS=Multi-Body Systems) two powerful object-oriented programs were developed, both usable without special knowledge of the numeric methods, with an easy-to-use graphical user-interface. The FEM-spring-processor includes modules for different helical springs, torsion springs, Belleville springs and a feature based branch for easy modelling of complex shaped springs made of wire or strip. Nonlinearities can be computed, results are load curves, stresses and natural frequencies. For the analysis of highly dynamic applications, the additional use of MBS is advised. The MBS-spring-processor includes models for helical compression springs. The paper describes the programs and examples of use.
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Einfluss der Prozessparameter beim Vergüten von Federstahldrähten auf ihr Festigkeits- und Umformverhalten. - In: Innovation Draht, ISBN 978-3-86012-300-3, (2007), S. 263-278
Um den ständig wachsenden Anforderungen an Schraubenfedern bzgl. Genauigkeit der Einhaltung ihrer Funktion und Gestalt gerecht zu werden, ist es notwendig, das Ausgangsmaterial Federstahldraht hinsichtlich seines Festigkeits- und Umformverhaltens zu optimieren. Für ölschlussvergütete Federstahldrähte kann dies durch eine verbesserte Abstimmung der verschiedenen Prozessparameter bei der Drahtvergütung erreicht werden. Der Beitrag stellt hierzu durchgeführte systematische Untersuchungen und die erzielten Ergebnisse vor. Dazu zählen auch die Eigenschaften von Schraubenfedern, hergestellt aus unterschiedlich vergüteten Drähten.