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1	Charakterisierung und Bewertung von Dichtprinzipien für den Einsatzbereich in der Innenhochdruck-Umformung (IHU) von dünnwandigen, rohrförmigen Bauteilen: SFU 2023 Fischer, Pierre, Reuter, Thomas, Güra, Thomas, Grundmann, Andreas 06 March 2024 (has links) Das Innenhochdruck-Umformen (IHU), ein Verfahren der Metallformung zur Herstellung von anspruchsvollen Bauteilen mit komplexer Geometrie aus meist hohlzylindrischen Halbzeugen, wird in einigen Branchen seit mehreren Jahrzehnten mit großem Erfolg angewendet. Insbesondere die vielfältigen Applikationen aus dem Automotivbereich wie z.B. Elemente der Abgasanlage, Strukturbauteile oder auch Antriebselemente können hergestellt werden. Da die Trends der Rohr- und Blechumformung in Richtung Leichtbau, komplexer Bauteile mit geringen Ausbringungsmengen und hoher Genauigkeit gehen, ist perspektivisch mit der Erschließung weiterer Anwendungs-gebiete zu rechnen. Um das Verfahren effizienter zu gestalten, können zusätzliche Prozesse in das IHU-Verfahren integriert werden. Beispiele dafür sind das Lochen sowie das Kragenziehen und weitere Fügeprozesse. Typische Bauteile sind Leicht-baunockenwellen, bei denen die Nocken innerhalb des Umformprozesses auf die Rohre form- und kraftschlüssig gefügt werden. Ungeachtet einer beliebigen dreidimensionalen Formgebung und der hohen Flexibilität unterliegt das IHU-Verfahren gewissen Restriktionen. So werden im industriellen Umfeld generell nur Halbzeuge mit Wanddicken ab 1,5 mm bis maximal 3,5 mm umgeformt. Bei dünnwandigen, rohr-förmigen Bauteilen sind Wanddicken unter 1 mm üblich. Diese erfordern spezielle technologische Maßnahmen im Bereich des Werkzeugbaus insbesondere Anforderungen an Dichtsystem sowie Werkzeuggravur und unterliegen Prozessparametern mit entsprechend kleineren Prozessfenstern.
2	Characterization and evaluation of sealing principles for use in hydroforming (IHU) of thin-walled, tubular components: SFU 2023 Fischer, Pierre, Reuter, Thomas, Güra, Thomas, Grundmann, Andreas 06 March 2024 (has links) Hydroforming, a metal forming process for the production of sophisticated components with complex geometries from mostly tubular semi-finished products, has been successfully applied in some industries for several decades. Particularly, various applications from the automotive sector such as elements of the exhaust system, structural components or drive elements can be manufactured. As trends in tube and sheet metal forming move towards lightweight construction, complex components with low production volumes, and high precision, the prospective expansion into further application areas is anticipated. To enhance the efficiency of the process, additional processes can be integrated into the hydroforming process. Examples of this are punching, collar pulling and other joining processes. Typical components include lightweight camshafts in which the cams are form- and force-fitted onto the tubes within forming process. Despite arbitrary three-dimensional forming and the high degree of flexibility, the hydroforming process is subjected to certain restrictions. Generally, in an industrial environment, only semi-finished products with wall thicknesses from 1.5 mm to a maximum of 3.5 mm are formed. Wall thicknesses of less than 1 mm are common for thin-walled, tubular components. These require special technological measures in the area of toolmaking, particularly regarding sealing system and tool engraving, and are subjected to process parameters with correspondingly smaller process windows
3	Les Prétentions du Violoncelle: The Cello as a Solo Instrument in France in the pre-Duport Era (1700-1760) Yapp, Francis Anthony January 2012 (has links) When Hubert Le Blanc published his Défence de la basse de viole in 1741, the cello had already established itself as a solo instrument in Parisian musical life. Several cellists, both French and foreign, had performed to acclaim at the Concert Spirituel, and the instrument had a rapidly expanding repertoire of published solo sonatas by French composers. Among the most significant of the early French cellist-composers were Jean Barrière (1707-47), François Martin (c. 1727-c. 1757), Jean-Baptiste Masse (c. 1700-1757), and Martin Berteau (1708/9-1771). Their cello sonatas are innovative, experimental, often highly virtuosic, and, in spite of unashamedly Italianate traits, tinged with a uniquely French hue. Yet notwithstanding its repertoire and the skill of its performers, this generation of French cellist-composers has remained undervalued and underexplored. To a large extent, this neglect has arisen because a succeeding generation of French cellists of the late eighteenth century - the Duport brothers, Jean-Pierre (1741-1818) and Jean-Louis (1749-1819), the Janson brothers, Jean-Baptiste-Aimé (1742-1823) and Louis-Auguste-Joseph (1749-1815), and Jean-Baptiste Bréval (1753-1823) - are widely acknowledged as the creators of the modern school of cello playing. This dissertation focuses exclusively on the early French cello school. It seeks to examine the rise of the solo cello in France within its socio- cultural and historical context; to provide biographies of those com- prising the early French cello school; to explore the repertoire with particular emphasis on the growth of technique and idiom, detailing features that may be described as uniquely French, and to assert the importance of and gain recognition for this school, not as a forerunner of the so-called Duport school but as an entity in itself. basse de violon violoncello violoncelle cello cellists eighteenth century concert spirituel salons opéra vingt-quatre violons du roi french france paris louis xv orleans angers stanislas leszczynski stück l'abbé barrière berteau patouart giraud spourny françois martin boismortier corrette masse bowing double stopping double stops thumb position boivin leclerc sonata sonatas baroque

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